JPH042112Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement in a seat belt device applied to a suspension seat.

(Prior Art) In order to improve riding comfort in large vehicles, etc., a suspension seat is used in which a driver's seat is supported on the floor of a vehicle interior via a floating support mechanism consisting of springs, links, and the like.

For vehicles equipped with this suspension seat,
In order to ensure the safety of passengers, seats 1 and cabin floor 2 are installed as shown in Figures 3 and 4.
Seat belt anchor parts 3 and 4 are provided on each of the seat belt anchor parts 3 and 4, and the occupant P is held in the seat 1 via the seat belt 5 connected to the left and right seat anchor parts 3.
The movement of the seat in an emergency is restricted through the intermediate webbing 6 connected to the seat.

(Problem to be solved by the invention) By the way, the seat anchor part 3 needs to be provided at the rear end of the seat 1. For example, in the above seat belt device, a metal anchor part 3 fixedly installed along the rear edge of the seat 1 is used. The seat anchor portions 3 are provided at both ends of the seat belt bar 7, and the structure in which the seat anchor portions 3 are shared with the seat belt 5 as the connection point on the seat side of the intermediate webbing 6 is such that the seat anchor portions 3 and the floor This cannot be used unless there is a sufficient distance L between the anchor portion 4 and the anchor portion 4.

This is because, due to the sewing of the belt and the dimensions of the metal fittings, it is necessary to ensure the connection point spacing L is at least 100 mm.For this reason, this seat belt is not suitable for vehicles that have a floor that rises immediately after the seat. Structures may not be applicable.

On the other hand, as a way to avoid such inconveniences, the part corresponding to the intermediate webbing 6 is formed in a series as a seat belt, and the middle part is attached to a part next to the seat so that it comes off when a load exceeding a predetermined limit is applied. There is one that is temporarily fixed, but it is difficult to set the detachment load of the temporarily fixed part, and there is a risk that the belt will come off even under normal conditions, so there is some concern in terms of ensuring safety. (Known documents regarding this type of seat belt device include, for example, Utility Model Application Publication No. 49-79921
See USP No. 3890002. ) The present invention aims to solve these conventional problems.

(Means for Solving the Problem) In order to achieve the above object, the present invention provides a seatbelt anchor portion that is attached to the rear end of the suspension seat that is floatingly supported on the vehicle interior floor and on the floor behind it. The seatbelt is branched into two directions rearward at a portion in front of the anchor portion at the rear end of the seat, one end of which is connected to the anchor portion at the rear end of the seat, and the other end is branched into two directions. The ends of each were connected to the anchors on the floor.

(Function) Based on the above structure, the occupant is held in the seat by the belt section connected to the seat-side anchor section, and movement of the occupant and the seat relative to the cabin is restrained by the belt section connected to the floor anchor section. .

The belt part on the floor anchor side branches from the seat belt in front of the anchor part at the rear end of the seat, so the belt length from this branch part to the floor anchor part is the same as the belt length from the rear end of the seat to the back of the seat belt. It is larger than the distance to the floor. Therefore, even in a vehicle cabin structure in which the distance between the rear end of the seat and the floor anchor portion is extremely narrow, the seat belt can be easily connected to the floor.

(Example) Next, an example of the present invention will be described based on the accompanying drawings.

In Figure 1 or Figure 2, 11 is a seat;
2 is the backrest, 13 is the cabin floor, 14 is a suspension mechanism that supports the seat 11 in a floating manner with respect to the floor 13, 15 is a seat belt bar fixed to the lower part of the rear end of the seat 11, and 16 is a seat belt. Seat anchor parts provided at both ends of the bar 15, 1
7 is a floor anchor part provided on the floor 13, 1
8 is a seat belt.

The seat belt 18 has a left-right split structure, and can be connected or disconnected via a buckle 19 located in front of the occupant P. The left and right seat belts 18 each extend from the buckle 19 toward the rear and sideways to the seat anchor portion 16, and the first belt 1 is connected to the seat anchor portion 16.
8A, and a second belt portion 18B connected to the floor anchor portion 17.

This branched belt 18 can be constructed by, for example, forming one of the first belt part 18A and the second belt part 18B in series with the part leading to the buckle 19, and then sewing the other one together at a branch part 20 in the middle. Alternatively, it can be formed by forming both in series, bending the part corresponding to the branch part 20, and sewing it to the end of the belt from the buckle 19.

On the other hand, the seat anchor part 16 and the floor anchor part 17
are arranged so that, when the passenger P is wearing the belt 18, they are located in a straight line when viewed from the side as shown in FIG.

Further, the length L1 of the second belt portion 18B extending to the floor anchor portion 17 is set such that the seat belt 18 is tensioned when the seat 11, which is floatingly supported via the suspension mechanism 14, is raised to the maximum relative to the floor 13. is set to . Note that the length of the belt portion that restrains the occupant P using the seat anchor portion 16 as a fulcrum can be arbitrarily adjusted via the buckle 19 or an adjustment mechanism (not shown).

Based on the above configuration, the movement of the occupant P forward or upward in the event of a collision is restrained by the seat belt 18. Specifically, the first belt portion connected to the anchor portion 16 at the rear end of the seat 11 is restrained by the seat belt 18. 18A, and the vehicle interior is restrained by the tension of the second belt portion 18B connected to the anchor portion 17 of the floor 13. Therefore, even though the seat 11 is movable via its suspension mechanism 14, the movement of the occupant P within the vehicle interior is suppressed, and his/her safety is reliably maintained.

On the other hand, focusing on the structure of the seat belt device, in the second belt section 18B connected to the floor anchor section 17, the branch section 20 on the seat belt 18 is located forward of the seat anchor section 16. Therefore, the mounting position of the seat anchor portion 16 does not impose any restrictions on its length L1, and therefore, it can be easily applied to vehicles that do not have sufficient space between the seat 11 and the cabin floor 13. can do.

Further, as described above, the seat belt 18 can be made by simple operations such as sewing, and there is no need to manufacture new parts in addition to existing parts, which increases the cost of the seat belt device. Moreover, since the structure is simple, the reliability is high.

Incidentally, due to the floor structure, etc., the floor anchor portion 17 may be provided at a position separated laterally from the seat 11 as shown in FIG. 2, but in this case, the conventional example shown in FIG. In order to ensure strength, it is necessary to position the seat anchor part 3 on the outside of the seat 1 so that the belts 5 and 6 are tensioned along the straight line connecting the point of contact with the occupant P and the floor anchor part 4. Therefore, there was a problem in that a large bending load was applied to the seat belt bar 7 supporting the seat anchor part 3. In contrast, in this invention,
Since the seat belt 18 branches in the middle, it is possible to set the positions of the floor anchor part 17 and the seat anchor part 16 individually. Therefore, as shown in FIG.
This has the advantage that the strength load on the seat belt bar 15 is reduced accordingly, and the seat belt bar 15 can be made smaller and lighter.

Although the embodiment has been described assuming a two-point seatbelt, it goes without saying that the present invention can also be configured as a three-point seatbelt device.

(Effects of the invention) As described above, according to the invention, even in vehicles where there is not enough space between the seat and the floor behind it, the seatbelt can be placed at the appropriate position relative to the seat and the floor. can be concatenated,
The movement of the suspension seat and occupant can be reliably restrained in an emergency.

Furthermore, the present invention has a simple structure and high reliability, and also has the advantage that it does not require any new additional parts and can be easily realized using conventional manufacturing equipment.

[Brief explanation of the drawing]

FIG. 1 is a side view of an embodiment of the present invention, and FIG. 2 is a plan view of the same. Figure 3 is a side view of the conventional example.
FIG. 4 is also a plan view. 11...seat, 12...backrest, 13...
Vehicle interior floor, 14... Suspension mechanism, 15
...Seat belt bar, 16...Seat anchor part,
17... Floor anchor part, 18... Seat belt, 19... Buckle, 20... Seat belt branch part.

Claims (1)

[Scope of utility model registration request] In a seatbelt device, a seatbelt anchor is provided at the rear end of a suspension seat that is floatingly supported on the vehicle interior floor, and on the floor behind the seatbelt, and the seatbelt is placed in front of the anchor at the rear end of the seat. Branches backward in two directions at the part,
A seat belt device for a suspension seat, characterized in that one end of the belt is connected to an anchor portion at the rear end of the seat, and the other end thereof is connected to an anchor portion on the floor.