JPS6020520Y2 - Buffer device in seat belt device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a shock absorbing device used in seat belt devices and the like.

2. Description of the Related Art Conventionally, a three-point seatbelt device is shown in FIG. 1, for example.

One end of the occupant restraint webbing 1 is secured to a rocker panel 3 of the vehicle body by an anchor plate 2.
The other end is similarly wound up on a winding device 4 attached to the rocker panel 3.

This winding device 4 has a built-in inertia lock mechanism that abruptly stops unwinding the webbing 1 in case of a vehicle emergency.

The middle portion of this webbing 1 is folded back at a slip anchor 5, and this slip anchor 5 is locked to an anchor device 7 attached to a center pillar 6 of a vehicle body via a mounting bolt.

Further, a tongue plate 8 is attached to the middle part of the webbing 1 so as to be movable in the longitudinal direction of the webbing 1, and this tank plate 8 can be engaged with a buckle device 9 that is erected from approximately the center of the vehicle body. This restrains the occupant seated on the seat 10.

In this seat belt device, the webbing 1 can be unwound from the winding device 4 under normal vehicle running conditions, but the occupant can freely change the driving posture by wearing the webbing 1. It is something.

In this seat belt device, when the vehicle is in an emergency situation such as a collision, the inertia lock mechanism in the winding device 4 is activated to abruptly stop the unwinding of the webbing 1. This allows for a more reliable restraint state.

However, seatbelt devices configured in this manner do not have a shock absorbing device that absorbs and cushions the impact load when it becomes significantly large, so if the impact load increases significantly due to a collision, etc. In this case, all of the force is applied to the occupant on the seat who is restrained by the webbing, and the part that is in contact with the webbing is put under considerable pressure, which has the disadvantage of causing harm to the occupant.

This idea was made based on the above circumstances,
When an impact force exceeding a predetermined value is applied, this product can absorb this impact force and ensure the safety of passengers, and also provides a highly reliable product with an extremely simple configuration at a low price. It is an object of the present invention to provide a shock absorbing device for a seat belt device that can be used in a seat belt device.

This invention will be explained with reference to an embodiment shown in the drawings.

Fig. 2 is a perspective view showing an embodiment of the shock absorber in the seat belt device of this invention, Fig. 3 is a sectional view showing the state of the shock absorber before use, and Fig. 4 shows the state of the shock absorber after use. 5 is a sectional view showing the webbing, and FIG. 5 is a perspective view showing the base end of the webbing.

In each figure, 12 is a shock absorber in a seat belt device, and this shock absorber 12 is made of a metal material.
The main body 13 has a U-shaped cross section.

Shock-absorbing holes 15 are formed in opposing positions of side plates 14A and 14B of the main body 13, respectively.

The shock absorbing hole 15 is formed as a long hole, and protrusions 16A and recesses 16B are alternately formed on opposing sides thereof.

The projecting pieces 16A and the recesses 16B are configured so that they are offset from each other when they face each other, and are alternately crushed by a moving rod 21, which will be described later.

Note that the protruding piece 16A and the recess 16B may be arranged to face each other, and in this case, the protruding piece 16A is connected to the moving rod 2.
1 will be crushed at the same time.

Further, holding holes 18A and 18B for holding a moving rod 21, which will be described later, are formed at both ends of the shock absorbing elongated hole 15, respectively.

The diameters of the holding holes 18A and 18B are larger than the distance between the projecting pieces 16A and 16A, so that the moving rod 21 does not move during normal operation.

Furthermore, a side plate 14A of the main body 13. A holding rod 20 for holding the base end of the webbing 19 is provided in the through hole 17 provided at opposite positions of the webbing 14B.

It is being constructed.

Furthermore, a movable rod 21 for changing the direction of the webbing 19 and detouring the webbing 19 is installed in the holding hole 18A of the shock absorbing hole 15 at a position away from the holding rod 20 (upper position in the figure).

When an impact force of more than a predetermined value is applied to the webbing 1-9, the movable rod 21 moves to the protrusion 16A in the impact-absorbing elongated hole 15.
Move in the direction of arrow B while crushing the webbing 1
9 to protect the occupants by alleviating the impact force.

On the other hand, a through hole 22 for attachment is bored in one end of the intermediate plate 14C of the main body 13, and it can be rotatably attached to an appropriate location on the vehicle body, seat, etc. through this through hole 22. Become.

Furthermore, protective members 23A and 23B made of synthetic resin are attached to the inner surfaces of the side plates 14A and 14B of the main body 13 by appropriate means (in the figure, protective members 23A,
It is attached by locking pieces 24A, 24B of 23B and screws 25A, 25B.

This protective part; materials 23A and 23B have long holes 15 for shock absorption.
A guide groove 27 having a diameter larger than that of the guide groove 27 is formed.

Further, a cover (not shown) is attached to the main body 13 as necessary, so that the inside cannot be seen.

In this case, a display section 26 (which may be a picture, etc.) consisting of characters such as "unusable" is provided in a portion adjacent to the base end of the webbing 19 to confirm whether or not the webbing 19 has been used. If the display section 26 is configured to protrude from inside the cover when the movable rod 21 moves through the shock absorbing elongated hole 15 due to an impact force, the state before and after use can be accurately confirmed.

(See Figure 5). This display section 26 may be displayed directly on the webbing 19, but as shown in the figure, the display section 26
6 may be formed into another member and this may be attached by appropriate means.

The shock absorbing device 12 configured in this manner has the end portion of the webbing 19 of the seat belt device attached, and the intermediate plate 1
It will be pivotally supported at an appropriate position on the vehicle body, seat, etc. via the 4G through hole 22.

And, under normal vehicle driving conditions, Uni Pink 1
9 will be kept as is.

Furthermore, the same applies to the case where an impact force is generated below a predetermined position (see FIG. 3).

On the other hand, impact force exceeding a predetermined value (for example, 500 to 800 kg)
) occurs, and if the impact force is applied to the occupant,
The webbing 19 is pulled out in the direction of arrow A by the occupant sitting on the seat.

As a result, the webbing 19 is connected to the side plate 14A of the main body 13,
The movable rod 21 installed in the shock absorbing long hole 15 between 14B is pressed, and the movable rod 21
The webbing 19 is moved to the lower holding hole 18B while crushing the protruding piece 16A inside the webbing 5, and the webbing 19 is pulled out only for moving the movable rod 21, thereby absorbing the impact force of the occupant who is in contact with the webbing 19.

In addition, since the movable rod 21 that moves within the shock absorbing elongated hole 15 is formed by shifting the positions of the protrusions 16A provided on opposing surfaces, the movable rod 21 moves while rotating and the protrusions 1
6A will be crushed alternately, so the movement will be smooth (see Figure 4).

Moreover, the moving rod 21 does not necessarily move to the end of the impact absorbing elongated hole 15, but will stop at an appropriate position depending on the magnitude of the impact force.

In this way, when the webbing 19 is extended and absorbs the impact force, the display section 26 consisting of letters and the like provided at a position adjacent to the base end of the webbing 19 is pulled out from the cover so that the occupant etc. can check it. In this case, the shock absorbing device 12 is removed at an appropriate location and replaced with a new one.

It should be noted that the above embodiment is merely an example, and it goes without saying that each member can be replaced with another member having the same function.

For example, it goes without saying that the applied device can be applied to any appropriate device capable of protecting an occupant other than a seat belt device.

Further, the protrusion 16A and the recess 16B formed at opposite positions of the shock absorbing elongated hole 15 are not limited to this, and are broken by the moving rod 21 when an impact force of a predetermined value or more is applied. Any configuration may be used as long as the movable rod 21 is movable and the webbing 19 is extended.

For example, the shock absorbing elongated hole 15 may be formed by appropriately arranging a plurality of circular, triangular, or rectangular holes.

Furthermore, the size and length of the shock absorbing elongated hole 15 are determined by the material of the side plates 14A and 14B of the main body 13, and the material of the moving rod 21.
It is determined as appropriate depending on conditions such as the diameter of the hole and the value of impact force.

Since this device is constructed as described above, when an impact force of more than a predetermined value is applied, the movable rod is moved along the impact-absorbing elongated hole to pull out the detouring webbing and come into contact with the webbing. The safety of the occupants can be ensured by absorbing the impact force exerted by the occupants.

Further, the movement of the moving rod is smooth and no vibration occurs during movement.

Moreover, it has excellent effects such as being able to supply a highly reliable product with an extremely simple structure at a low cost.

Furthermore, by forming a display section on the base end of the webbing, it is possible to directly check the condition of the shock absorber before and after use, allowing for proper management without leaving it in the same state after use. It is something that can be done.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of a seat belt device, Fig. 2 is a perspective view showing an embodiment of a shock absorber in the seat belt device of this invention, and Fig. 3 shows the state of the shock absorber before use. 4 is a sectional view showing the state of the shock absorber after use, and FIG. 5 is a perspective view showing the base end of the webbing. 12...Buffer device, 13...Body, 1
4A, 14B...Side plate, 15...Elongated hole for shock absorption, 16A...Protrusion piece, 16B...
... Recessed portion, 17... Through hole, 18A, 18B.
...Retaining hole, 19...Webbing, 20
...Holding rod, 21...Moving rod, 22.
...Through hole, 23A, 23B...Protection member, 24A, 24B...Locking piece, 26...
...Display section.

Claims (1)

[Scope of utility model registration request] U-shaped main body 1 that is attached to a vehicle and supports webbing
3 and the impact-absorbing elongated holes 15 provided in the opposing side plates 14A and 14B of the main body, and are placed at a position away from the holding rod 20 that normally holds the base end of the webbing 19 to detour the webbing. A shock absorbing device comprising a movable rod 21, which moves the movable rod 21 along the shock absorbing elongated hole 15 to pull out the detoured webbing inside the cover when an impact force of a predetermined value or more is applied. 12, the webbing 19 has a display portion 26 formed in a position close to the holding rod 20, and the movable rod 21 is connected to the shock absorbing elongated hole 15.
A shock absorbing device for a seat belt device, characterized in that the display portion 26 is configured to protrude from a detour portion when the display portion 26 moves along the detour portion.