JP4141658B2 - Seat belt device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a so-called seat belt device attached to, for example, an auxiliary seat of a one-box vehicle.
[0002]
[Prior art]
As is well known, a two-point seat belt device is attached to an emergency auxiliary seat provided on the side of, for example, a central seat of a one-box vehicle in order to ensure the safety of the passenger at the time of a collision. ing. One example is shown in FIGS. 3 to 5.
[0003]
Briefly, this conventional two-point seat belt device is provided on an auxiliary seat 1 including a seat cushion 3 and a seat back 4 on a seat leg 2 fixed to a vehicle body floor. A belt buckle 5 fixed to the side, a retractor 6 fixed to the seat leg 2 on the other side of the seat cushion 3, and a seat belt 7 wound around the retractor 6 so as to be freely drawn out are provided. . A tongue 8 detachably attached to the belt buckle 5 is attached to the front end of the seat belt 7.
[0004]
Therefore, in order to attach this seat belt, first, the seat belt 7 is pulled out from the reflector 6 by holding the tongue 8 of the seat belt 7, and as shown in FIG. If the tongue 8 is passed through the leg of the person H who is seated through from the lateral direction and the tongue 8 is locked to the belt buckle 5 as shown in FIG.
[0005]
[Problems to be solved by the invention]
[0006]
However, in the conventional seat belt device, the retractor 6 is fixed to the seat leg 2, and the belt buckle 5 is also simply fixed to one side of the seat cushion 3. When a large impact load is applied forward at the time of a collision and the seat belt 7 is suddenly pulled forward, the seat cushion 3 may be pulled by the seat belt 7 and lifted.
[0007]
Moreover, since the retractor 6 is only fixed to the seat leg 2, there is a possibility that the coupling rigidity thereof cannot be sufficiently obtained.
[0008]
Therefore, the present invention provides a seatbelt device that can sufficiently withstand sudden pulling by a seatbelt and that can regulate the lifting of a seat cushion and that has high safety.
[0009]
[Means for Solving the Problems]
[0010]
The invention according to claim 1 is fixed to an engagement member attached to one side portion of a seat cushion supported on a vehicle body floor via a seat leg, and to a vehicle compartment side wall on the other side portion of the seat cushion. A first seat belt having a first retractor, a first seat belt wound around the first retractor and having a locking member that can be engaged with and disengaged from the engaging member at a distal end, and a vehicle body floor below the seat cushion. A second retractor and a second seat belt wound around the second retractor and having a distal end portion fixed in the vicinity of the engaging member are provided.
[0013]
According to a second aspect of the present invention, the engaging member is formed by a first tongue or a first buckle, while the engaging member is engaged with and disengaged corresponding to the first tongue or the first buckle, respectively. Alternatively, the second buckle is used.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
[0015]
Hereinafter, an embodiment in which a seat belt device according to the present invention is applied to an auxiliary seat will be described in detail with reference to the drawings.
[0016]
That is, as shown in FIGS. 1 and 2, the auxiliary seat 11 includes a seat leg 12 fixed on the vehicle body floor 10 and a seat provided on the seat leg 12 so as to be foldable in the right rotation direction of FIG. 1. The cushion 13 and the seat back 4 provided at the rear portion of the seat cushion 13 and foldable forward are configured.
[0017]
The seat leg 12 has a bracket 12a fixed on the vehicle body floor 10, and a support portion 12b integrally fixed to a side portion of the bracket 12a and having an upper end bent upward. The seat cushion 13 is mounted and fixed to the support portion 12b of the seat leg 12 on the other side of the lower portion, that is, the lower left side.
[0018]
The seat belt device includes a belt tongue 14 that is an engaging member attached to one side portion of the seat cushion 13 and a first retractor provided on a vehicle compartment side wall 15 on the other side portion of the seat cushion 13. 16, a first seat belt 17 wound around the first retractor 16, a second retractor 18 fixed to the vehicle body floor 10 in the vicinity of the seat leg 12, and a second retractor 18 wound around the second retractor 18. And a second seat belt 19.
[0019]
The first seat belt 17 is provided with a buckle 20 which can be engaged with and disengaged from the belt tongue 14 at the front end portion thereof, while the second seat belt 19 has a front end portion 19a attached to a base portion 14a of the belt tongue 14. It is fixed to the lower part of the seat cushion 13 through a fixed anchor 21 fixed together with bolts or the like.
The second retractor 18 is fixed on the vehicle body floor 10 located inside the bracket 12a of the seat leg 12 via a bracket 22 bent in a substantially L shape.
[0021]
Therefore, in order to wear the first seat belt 17 of the two-point seat belt apparatus, first, for example, a person seated on the seat cushion 13 has a buckle of the first seat belt 17 with, for example, the left hand as shown in FIG. 20 is pulled upward from the first retractor 16, and is wound around the waist of a seated person, and the buckle 20 is locked to the belt tongue 14 held in the right hand. Thereby, the mounting of the first seat belt 20 is easily completed.
[0022]
In this two-point seat belt device, the distal end portion 19a of the second seat belt 19 wound around the second retractor 18 has an anchor portion 21 on one side of the seat cushion 13, that is, on the belt tongue 14 side lower portion. Therefore, even when a sudden impact load is applied to the seat cushion 13 via the first seat belt 17 in the event of a vehicle collision, the load is supported by the second seat belt 19. Therefore, it is possible to reliably prevent the seat cushion 13 from being lifted.
[0023]
In addition, since the first retractor 16 is fixed to the vehicle interior side wall 15 instead of the seat leg as in the prior art, the coupling rigidity of the first retractor 16 is increased, and the seat cushion 13 is further lifted via the first seat belt 17. Can be suppressed.
[0024]
As a result, the seat belts 17 and 19 can sufficiently withstand a sudden forward load, and high safety can be ensured.
[0025]
Further, since the anchor portion 21 is provided at a position opposite to the support portion 12b of the seat leg 12 with respect to the lower portion of the seat cushion 13, the seat cushion 13 can be more effectively prevented from being lifted.
[0026]
When the seat cushion 13 is folded up while standing in the left direction in FIG. 1 via the hinge at the upper end of the support portion 12b, the second seat belt 19 is pulled out from the second retractor 18, but the pulling speed is sufficiently slow. Therefore, the stopper mechanism of the second retractor 18 does not work and can be folded without any resistance.
[0027]
Further, the closer the position of the second retractor 18 is to the position immediately below the anchor portion 21, the greater the effect of preventing the seat cushion 13 from being lifted. It is desirable to set the position close to the part 21.
[0028]
The present invention is not limited to the configuration of the above-described embodiment. For example, the buckle 20 of the first seat belt 17 can be changed to a tongue, and at the same time, the belt tongue 14 can be changed to a buckle.
[0029]
【The invention's effect】
[0030]
As apparent from the above description, according to the seat belt device of the first aspect, the second retractor is fixed to the predetermined position of the vehicle body on the engagement member side, and the second retractor is wound around the second retractor. 2 Since the front end of the seat belt is fixed in the vicinity of the engaging member, the load is supported by the second seat belt even when a sudden impact load is applied to the seat cushion in the event of a vehicle collision. Therefore, it is possible to reliably prevent the seat cushion from being lifted.
[0031]
Further, the first retractor, rather than traditional seat leg as, because fixed to the cabin side wall of the other side portion of the seat cushion, the coupling rigidity is increased, further suppressing the floating of the seat cushion be able to. As a result, each seat belt can sufficiently withstand a sudden forward load, and high safety can be ensured.
[0032]
Further, since the second retractor is fixed to the vehicle body floor, the coupling rigidity is increased, and in this respect as well, it is possible to increase the seat cushion lifting restraining force.
[0033]
According to invention of Claim 2 , the freedom degree of selection of a locking member or an engagement member improves.
[Brief description of the drawings]
FIG. 1 is a rear perspective view showing an embodiment of a seat belt device according to the present invention.
FIG. 2 is a schematic perspective view of the embodiment.
FIG. 3 is a perspective view partially showing a conventional two-point seat belt device.
FIG. 4 is an explanatory view showing the operation of the conventional seat belt device.
FIG. 5 is a view taken in the direction of arrow A in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Vehicle body panel 11 Auxiliary seat 12 Seat leg 13 Seat cushion 14 Belt tongue 15 Cabin side wall 16 First retractor 17 First seat belt 18 Second retractor 19 Second seat belt 20 Buckle 21 Anchor part

Claims (2)

An engagement member attached to one side of a seat cushion supported on the vehicle body floor via seat legs;
A first retractor fixed to a passenger compartment side wall on the other side of the seat cushion;
A first seat belt that is wound around the first retractor and has a locking member that can be engaged with and disengaged from the engaging member at a distal end portion;
A second retractor fixed to the vehicle body floor below the seat cushion;
A seat belt device comprising: a second seat belt wound around the second retractor and having a distal end portion fixed in the vicinity of the engaging member.   The engaging member is formed by a first tongue or a first buckle, while the locking member is formed by a second tongue or a second buckle that engages and disengages corresponding to the first tongue or the first buckle, respectively. 2. The seat belt device according to claim 1, wherein

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