JP2021120261A - Seat belt attachment structure - Google Patents

Abstract

To provide a seat belt attachment structure which stabilizes a support state of an auxiliary seat to enable improvement of occupant protection performance.SOLUTION: In an attachment structure of a seat belt which is used when a folded auxiliary seat 1 provided in a passage of a vehicle cabin is deployed and an occupant is seated thereon, a buckle fixing member 10 and a projection member 16 are provided. The buckle fixing member 10 has a buckle 11, into which a tongue of the seat belt is inserted, at one end part, has a hook-shaped hook 13 at the other end part, and is pivotally supported so as to be rotatable relative to the auxiliary seat 1. The projection member 16 is fixed to a seat 2 located adjacent to the auxiliary seat 1 at a position, which faces the buckle fixing member 10 of the deployed auxiliary seat 1 and the deployed auxiliary seat 1 is placed thereon. Further, the projection member 16 engages with the hook 13 when the seat belt is used.SELECTED DRAWING: Figure 3

Description

The present invention relates to a seatbelt attachment structure in a foldable auxiliary seat.

Conventionally, in a seat belt for an occupant seating on a foldable auxiliary seat (auxiliary seat) provided in an aisle in a vehicle interior, a structure in which an end portion of the seat belt is installed on a floor surface (floor) is known. Such an auxiliary seat is rotatably supported with respect to a seat or a vehicle body adjacent to the aisle in the vehicle interior. When the auxiliary seat is not in use (normal time), it is in a folded state so as not to obstruct the passage of occupants. On the other hand, when there is an occupant who wants to sit on the auxiliary seat, the folded auxiliary seat is expanded and used toward the aisle side in the vehicle interior (see Patent Document 1).

Japanese Patent No. 3107744

The support state when the auxiliary sheet is used is often so-called "cantilever support (a state in which only one of the left and right ends is supported)". Therefore, it is desirable to sufficiently increase the overall rigidity of the auxiliary sheet, and there is a problem that it is difficult to avoid a decrease in productivity due to an increase in weight due to the reinforcing member and an increase in the number of parts. On the other hand, if the number of reinforcing members is easily reduced, the rigidity of the auxiliary seat becomes insufficient, and it is difficult to obtain good occupant protection performance.

The present invention has been devised in view of such a problem, and one of the objects of the present invention is to stabilize the supporting state of the auxiliary seat and improve the occupant protection performance. The present invention solves at least a part of the above problems, and is realized as the following aspects or application examples.

(1) It is a seatbelt attachment structure used when a occupant sits by deploying a foldable auxiliary seat provided in an aisle in the vehicle interior, and includes a buckle fixing member and a protrusion member. The buckle fixing member has a buckle into which a seatbelt tongue is inserted at one end, a hook-shaped hook at the other end, and is rotatably pivotally supported with respect to an auxiliary seat. The protruding member is fixed to the seat adjacent to the auxiliary seat at a position facing the buckle fixing member of the deployed auxiliary seat, and the deployed auxiliary seat is placed and engaged with the hook when the seat belt is used. ..

When the occupant deploys the auxiliary seat to sit on the auxiliary seat, the auxiliary seat is placed on the protrusion member, and a part of the load of the auxiliary seat is borne by the adjacent seat. As a result, the stability of the auxiliary seat is improved, and the seating posture of the occupant is easily stabilized. Further, the buckle fixing member is fixed by engaging the protruding member with the hook of the buckle fixing member. As a result, the load acting on the seat belt is applied to both the auxiliary seat and the adjacent seat, and the fixed state of the occupant by the seat belt is stabilized. Further, by engaging the hook on the auxiliary seat side with the protrusion member on the seat side adjacent to the auxiliary seat, it becomes easy to secure the rigidity of the auxiliary seat.

According to the present invention, the rigidity of the auxiliary seat can be easily ensured, and the occupant protection performance can be improved.

It is a perspective view of the vehicle seat to which the seatbelt mounting structure as an embodiment is applied, (A) is a view showing the unfolded state (when unfolded, when used) of the auxiliary seat, and (B) is the storage of the auxiliary seat. It is a figure which shows the state (normal state, when not in use). (A) is a top view of the vehicle seat of FIG. 1, and (B) is a front view thereof. It is a perspective view which shows the mounting structure of the seat belt of FIG. 1 in an enlarged manner. It is a perspective view of the protrusion member provided in the adjacent sheet shown in FIG. It is a side view of the seat belt mounting structure of FIG.

A seatbelt mounting structure as an embodiment will be described with reference to FIGS. 1 to 5. The front, rear, up, down, left, and right directions in the figure represent the directions determined with respect to the vehicle. It should be noted that the examples shown below are merely examples, and there is no intention of excluding the application of various modifications and techniques not specified in the following examples. Each configuration of this embodiment can be variously modified and implemented without departing from the purpose thereof. In addition, it can be selected as needed, or can be combined as appropriate.

[1. composition]
This structure is a seatbelt mounting structure used when the occupant sits on the auxiliary seat 1, and is applied to the vehicle seats shown in FIGS. 1A and 1B. FIG. 1 (A) shows the unfolded state (when unfolded and used) of the auxiliary sheet 1, and FIG. 1 (B) shows the retracted state (normal time and when not used) of the auxiliary sheet 1. The vehicle to which this structure can be applied is a vehicle in which a foldable auxiliary seat 1 is provided at least in the vehicle interior passage 4, and examples thereof include a minibus and a wagon vehicle.

This vehicle has a pair of left and right seats (general seats) arranged so as to sandwich the aisle 4 in the vehicle width direction, and an auxiliary seat 1 for temporarily utilizing the aisle 4 in the vehicle interior as a seating space. It will be provided. As shown in FIGS. 1A and 1B, the width of the auxiliary seat 1 is the width dimension of the vehicle interior aisle 4 (the dimension between the adjacent seat 2 located on the left side of the vehicle interior aisle 4 and the support seat 3). ) Is set. Hereinafter, the seat arranged on the left side of the aisle 4 in the passenger compartment is referred to as an adjacent seat 2, and the seat arranged on the right side of the aisle 4 in the passenger compartment is referred to as a support seat 3. The auxiliary seat 1 is rotatably installed via a folding device 8 fixed to the feet of the support seat 3.

As shown in FIG. 1A, the unfolded auxiliary sheet 1 is arranged so as to close the gap between the adjacent sheet 2 and the support sheet 3. By deploying the auxiliary seat 1 in this way, the occupant can be seated between the adjacent seat 2 and the support seat 3. On the other hand, as shown in FIG. 1 (B), the retracted auxiliary seat 1 is arranged on the left side of the support seat 3 (on the right side of the vehicle interior aisle 4) in a compactly folded state. By folding the auxiliary seat 1 in this way, the gap between the adjacent seat 2 and the support seat 3 is opened, and the occupant can pass through the vehicle interior passage 4.

The auxiliary seat 1 shown in FIGS. 1 (A) and 1 (B) includes a seat surface 5 (seat cushion) that supports the occupant's buttocks from below, and a backrest portion 7 (seat back) that supports the occupant's back from behind. Is provided. The seat surface 5 is pivotally attached to the support seat 3 via a folding device 8 arranged on the lower right side thereof. The folding device 8 has a function of rotating the seat surface 5 around a rotation axis extending in the vehicle length direction (front-rear direction). Further, the backrest portion 7 is pivotally attached to the rear end portion of the seat surface 5 via a hinge having a rotation axis extending in the vehicle width direction, for example, in the state shown in FIG. 1 (A).

The seat belt for the occupant seated on the auxiliary seat 1 is built in the auxiliary seat 1, the support seat 3, the vehicle body, and the like. For example, a seatbelt belt assembly (for example, a collective part including a seatbelt tongue 9, a belt, a retractor, etc.) is incorporated in the seat cushion of the support seat 3 as shown in FIG. 1 (A), and is incorporated in the seat cushion of the support seat 3. It is pulled out from the left side and used. Alternatively, the belt assembly is built in the seat surface 5 of the auxiliary seat 1 and is pulled out from the right side surface of the auxiliary seat 1 for use. The belt assembly can also be incorporated in the floor surface or ceiling surface in the vicinity of the auxiliary sheet 1. Further, the type of seat belt may be a two-point type or a three-point type.

As shown in FIG. 3, the left end portion of the seat surface 5 of the auxiliary seat 1 is provided with a recess 6 formed by inwardly recessing a corner portion sandwiched between the upper surface and the left side surface of the seat surface 5. The recess 6 is provided with, for example, a surface in which the upper surface of the seat surface 5 is recessed downward and a surface in which the left side surface of the seat surface 5 is recessed inward (right side), and is formed in a substantially cubic cavity shape. .. A buckle fixing member 10 is arranged inside the recess 6.

As shown in FIG. 3, the buckle fixing member 10 is provided with a buckle 11, a tubular portion 12, and a hook 13. The buckle 11 is a member in which an insertion hole 14 into which the tongue 9 of the seat belt is inserted is formed, and is provided at one end (front end) of the buckle fixing member 10. The tubular portion 12 is a tubular portion formed integrally with the buckle 11 behind the buckle 11, and is rotatable with respect to a frame (not shown) built in the seat surface 5 of the auxiliary seat 1. It is pivotally supported.

As shown in FIG. 3, the buckle fixing member 10 is provided so as to be able to be manually swung around the rotation shaft C extending in the vehicle width direction. The swing range of the buckle fixing member 10 is a range from the position shown by the solid line (buckle storage position) in FIG. 5 to the position shown by the broken line (buckle use position). Further, behind the tubular portion 12, a hook-shaped hook 13 integrally formed with the tubular portion 12 is provided. The hook 13 is provided with a pin receiving portion 15 that engages with the protrusion member 16 described later when the buckle fixing member 10 is in the buckle use position.

As shown in FIG. 4, the protrusion member 16 is a member fixed to the adjacent sheet 2. The protrusion member 16 has a function of supporting the seat surface 5 of the deployed auxiliary seat 1 from below and fixing the posture of the buckle fixing member 10 to the buckle use position. The protrusion member 16 is provided with a pin portion 17 and a handle portion 18. The steering wheel portion 18 has a pair of shaft-shaped members projecting from the side surface of the adjacent seat 2 toward the vehicle interior aisle 4 and a second shaft-shaped member for connecting the tip thereof in the front-rear direction. It is formed in a character shape.

The pin portion 17 is formed in a shaft shape that connects the side surface of the adjacent seat 2 and the second shaft-shaped member in the vehicle width direction. As shown in FIG. 5, the shaft diameter (diameter) of the pin portion 17 is set to a size that engages with the inside of the pin receiving portion 15. The engagement between the pin receiving portion 15 and the pin portion 17 prevents the buckle fixing member 10 from unintentionally swinging. Further, even if a load acts in the direction in which the tongue 9 of the seat belt is pulled out from the buckle 11, the load is transmitted to the adjacent seat 2 via the pin receiving portion 15 and the pin portion 17.

Further, in the present embodiment, the pin portion 17 and the handle portion 18 are integrally formed, and the shape in the top view is a horizontal shape. A resin cover 19 is placed on the peripheral surfaces of the pin portion 17 and the handle portion 18. The protrusion member 16 can be used as a handrail for a occupant seated on the adjacent seat 2 to stand up when the auxiliary seat 1 is not used, for example.

[2. effect]
In the above embodiment, as shown in FIG. 2B, the lower right side of the auxiliary sheet 1 in the unfolded state is supported by the folding device 8, and the lower left side of the auxiliary sheet 1 is supported by the protrusion member 16. That is, the auxiliary sheet 1 in the unfolded state is placed on the protrusion member 16, and a part of the load of the auxiliary sheet 1 is borne by the adjacent sheet 2. As a result, the stability of the auxiliary seat 1 is improved as compared with the so-called "cantilever support" structure, and the seating posture of the occupant is easily stabilized.

Further, by engaging the protrusion member 16 with the hook 13 of the buckle fixing member 10, the buckle fixing member 10 is stably fixed. As a result, the load acting on the seat belt is applied to both the auxiliary seat 1 and the adjacent seat 2, and the fixed state of the occupant by the seat belt is stabilized. Further, by engaging the hook 13 on the auxiliary seat 1 side with the protrusion member 16 on the adjacent seat 2 side, it becomes easy to secure the rigidity of the auxiliary seat 1. Therefore, according to the above embodiment, it is possible to improve the occupant protection performance while avoiding an increase in weight due to the reinforcing member and a decrease in productivity due to an increase in the number of parts. Further, it becomes easy to simplify the structure of the auxiliary sheet 1, and the weight of the auxiliary sheet 1 can be reduced.

1 Auxiliary seat 2 Adjacent seat 3 Support seat 4 Vehicle interior aisle 5 Seat surface 6 Recession 7 Backrest part 8 Folding device 9 Tongue 10 Buckle fixing member 11 Buckle 12 Cylindrical part 13 Hook 14 Insert hole 15 Pin receiving part 16 Protruding member 17 pin Part 18 Handle part 19 Cover C Rotating shaft

Claims (1)

It is a seatbelt attachment structure used when the occupants are seated by deploying the foldable auxiliary seats provided in the aisle inside the vehicle.
A buckle fixing member having a buckle into which the tongue of the seat belt is inserted at one end, a hook-shaped hook at the other end, and a buckle fixing member rotatably supported with respect to the auxiliary seat.
The deployed auxiliary seat is fixed to a seat adjacent to the auxiliary seat at a position facing the buckle fixing member, and the deployed auxiliary seat is placed and engaged with the hook when the seat belt is used. A seatbelt mounting structure comprising a matching protruding member.

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