JPH0534286Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a seat belt device equipped with webbing for restraining an occupant of a vehicle or the like in an emergency.

[Prior Art] There are various types of seat belt devices, such as those equipped with lap webbing that restrains the waist of the occupant, those equipped with shoulder webbing that restrains the upper body of the occupant, and those equipped with both of these. There is something like that.

Among these, there is a continuous webbing type seat belt in which a tongue plate slidably attached to the middle part of the occupant restraint webbing is engaged with a buckle device arranged on the widthwise inward side of the occupant seating seat. The device is widely available.

Incidentally, in a vehicle emergency, a phenomenon in which an occupant restrained by webbing changes from a normal sitting position to a position in which the passenger crawls downward is known as a submarine phenomenon. It is known that this phenomenon is likely to occur when the seat cushion of the passenger seating seat has a relatively low rigidity and therefore the seat cushion sinks relatively large.

Therefore, it is necessary for the seat cushion to have a predetermined rigidity regardless of the ride comfort during normal vehicle operation.

[Problems to be solved by the invention] Taking the above facts into consideration, the invention provides a seat that can prevent the occupant from sinking deeply into the seat cushion in the event of a vehicle emergency, even when the stiffness of the seat cushion is reduced. The purpose is to provide a belt device.

[Means for Solving the Problems] In the seat belt device according to the present invention, the seat belt device is arranged at the center below the seat cushion of the passenger seat, and one end is rotatably supported on the rear bottom surface of the seat cushion. A plate-shaped seat cushion reinforcing member whose other end is located near the front bottom surface of the seat cushion, and a shaft provided below the seat cushion reinforcing member and rotatably supported on the vehicle floor. A branch, a push-up part located under the other end of the seat cushion reinforcing member and pushing up the other end of the seat cushion reinforcing member by rotating around the pivot part, and a webbing for restraining an occupant, which is connected to the webbing for use in case of a vehicle emergency. The vehicle is characterized by having a push-up means including a connecting portion that is pulled by the occupant restraining webbing and rotates the push-up portion.

[Function] According to the above configuration, when a vehicle emergency occurs, a predetermined tension is applied to the occupant restraining webbing. Therefore, the connecting portion of the push-up means is pulled by the occupant restraining webbing. As a result, the push-up part of the push-up means is rotated around the pivot support. Here, the push-up portion is located below the other end of the plate-shaped seat cushion reinforcing member disposed below the seat cushion. Therefore, when the push-up part is rotated,
The other end of the seat cushion reinforcing member is rotated around the one end and pushed up. Therefore, the seat cushion is pressed from the bottom surface by the other end of the seat cushion reinforcing member. As a result, the amount of downward depression of the seat cushion is regulated, the rigidity of the seat cushion is increased, and the depth of depression of the occupant into the seat cushion is regulated.

[Embodiment] FIGS. 1 to 3 show a first embodiment of a seat belt device according to the present invention applied to an automobile.

As shown in FIG. 1, the webbing 10 for restraining an occupant is wound up by a biasing force onto a winding device 14 whose one end is attached to a side wall 12 of the vehicle body. The winding device 14 is provided with an inertia lock mechanism that instantly stops unwinding the webbing 10 as the occupant restraining webbing in the event of a vehicle emergency. Webbing 10 extending from take-up device 14
is folded back at a slip joint 16 attached to the side wall 12 of the vehicle body above the winding device 14, and the extending end is attached to the anchor plate 20 at the outer side in the width direction of the seat 18 for seating the passenger. It is latched to an arm 22 as a push-up means via the arm 22.

Slip joint 16 and anchor plate 20
A tongue plate 24 is slidably engaged with the webbing 10 located at an intermediate portion between the webbing 10 and the webbing 10 in the longitudinal direction of the webbing. The tongue plate 24 includes a buckle device 28 located on the inner side of the seat 18 in the width direction and erected on a floor 26 serving as a vehicle floor.
It is said that it can be engaged with.

As shown in FIG. 3, the arm 22 has a middle part (corresponding to the push-up part in the present invention) that is curved upward in a convex manner, and an end part on the side where the anchor plate 20 is locked (corresponding to the push-up part in the present invention). There is a cylindrical mounting part 30 at the end opposite to the connecting part in the invention.
(corresponding to the pivot support in the present invention) is formed. The arm 22 is disposed below the seat cushion 32 of the seat 18. The arm 22 is
A shaft 34 is rotatably inserted through the mounting portion 30. The shaft 34 is supported by a pair of brackets 36 fixed to the floor 26 along the longitudinal direction of the vehicle body, as shown in FIG.

One end of a tension coil spring 38 is locked to the arm 22, and the other end of this tension coil spring 38 is locked to the floor 26. As a result, the arm 22 is urged to swing counterclockwise in FIG. 1 about the shaft 34.

Above the arm 22 is a seat cushion 32.
A reinforcing plate 40 (corresponding to the seat cushion reinforcing member in the present invention) is provided. As shown in FIG. 3, the reinforcing plate 40 has a flat plate shape, and has a pair of cylindrical attachment parts 42 (seat cushions in the present invention) at the end located on the rear side of the seat cushion 32. (equivalent to one end of the reinforcing member)
is formed. In the reinforcing plate 40, a shaft 44 is rotatably inserted through a pair of attachment parts 42. The shaft 44 is supported by a pair of brackets 46 fixed to the back surface of the seat cushion 32 along the width direction of the seat cushion 32.

Further, the end of the reinforcing plate 40 opposite to the attachment part 42 (corresponding to the other end of the seat cushion reinforcing member in the present invention) is a free end and is located near the front bottom surface of the seat cushion 32. It is located.

As a result, the reinforcing plate 40 lifts the shaft 4 under its own weight.
4 as an axis in the counterclockwise direction in FIG. 2, but it comes into contact with the arm 22 (the upwardly curved portion) and is prevented from further swinging.

Next, the operation of this embodiment will be explained.

After the occupant 48 is seated on the seat 18, the webbing 10 is unwound from the take-up device 14 and the tongue plate 24 is engaged with the buckle device 28.
8 is in a state where the webbing is attached. Webbing 10
The slip joint 16 and tongue plate 2
The tongue plate 2 extends diagonally across the upper body of the occupant 48 and acts as a shoulder webbing.
4 and the anchor plate 20 acts as a wrap webbing across the waist of the occupant.

When the occupant 48 is wearing the webbing 10, the arm 22 is pulled by the webbing 10 and is swung slightly clockwise in FIG. 1 against the biasing force of the tension coil spring 38. The intermediate portion of the arm 22 presses against the reinforcing plate 40 and presses against the reinforcing plate 40.
is swung clockwise in Figure 2.

In the normal state of the vehicle, only the weight of the occupant 48 acts statically on the seat cushion 32, so the amount of compression of the seat cushion 32 is relatively small even if the pad material is flexible.

In the unlikely event that the vehicle falls into an emergency situation, the winding device 1
The inertia lock mechanism disposed at 4 is activated to instantly stop the unwinding of the webbing 10. At the same time, the relative acceleration acting on the occupant 48 applies tension to the webbing 10, and this tension causes the arm 22 to swing further clockwise from the position shown in FIG. As the arm 22 swings, the reinforcing plate 40 is further swung clockwise from the position shown in FIG. 2, and the seat cushion 32 is directed upward from below as shown in FIG. 2A. It acts like a push up.

In an emergency state of the vehicle, the weight of the occupant 48 acts dynamically on the seat cushion 32, so that the seat cushion 32 is compressed to a greater extent than when the vehicle is in normal conditions. However, seat cushion 3
2 is pushed up by the reinforcing plate 40 as described above, and its downward displacement is regulated by the reinforcing plate 40.
The downward displacement of the seat surface against which the occupant 48 is in contact is not large. Therefore, the seat cushion 32 is prevented from sinking significantly.

In this way, in this embodiment, the seat cushion 3
An arm 22 is disposed below 2 so as to be able to swing to the floor 26, and the reinforcing plate 4 is brought into contact with the arm 22.
0 is swingably arranged on the back side of the seat cushion 32, and furthermore, a webbing 1 is provided on the swinging end of the arm 22.
Since one end of 0 is locked, the reinforcing plate 40 pushes up the seat cushion 32 and prevents the seat cushion 32 from sinking significantly in the event of a vehicle emergency.

A second embodiment of the present invention is shown in FIGS. 4-5. In this example, seat cushion 3
Reinforcing plate 5 as a seat cushion reinforcing member of No. 2
A shaft rod 52 (corresponding to one end of the seat cushion reinforcing member in the present invention), which is bent in a dogleg shape and protrudes from both side surfaces of one end side, extends along the width direction of the seat cushion 32. A pair of brackets 54 fixed to the back side of the seat cushion 32
It is rotatably supported on the shaft. In addition, the reinforcing plate 50
The end opposite to the shaft rod 52 (corresponding to the other end of the seat cushion reinforcing member in the present invention)
is a free end similarly to the reinforcing plate 40 described above.

A shaft member 58 (corresponding to a shaft support in the present invention) is disposed below the reinforcing plate 50, with both ends rotatably supported by a pair of brackets 56 fixed to the floor 26 along the width direction of the vehicle body. It is set up. Shaft member 5
8, a cam plate 60 (corresponding to the pushing part in the present invention) is fixed to the center part, and an arm 62 (corresponding to the connecting part in the present invention) to the end on the inner side in the width direction of the vehicle body.
One end of is fixed.

The arm 62 has a tension coil spring 38 in the middle part.
One end is locked, and one end of a connecting fitting 64 is rotatably supported on the other end. The other end of the tension coil spring 38 is secured to the floor 26. A buckle device 28 is locked to the end of the connecting fitting 46. The basic system of the seat belt device including this buckle device 28 is the same as that of the first embodiment, but the anchor plate 20 located on the outer side in the width direction of the seat 18 is locked to the side wall 12 of the vehicle body.

In this embodiment, when the vehicle is in an emergency state, the buckle device 28 is pulled by the webbing 10 via the tongue plate 24, so the arm 62 swings counterclockwise in FIG. 4 against the biasing force of the tension coil spring 38. When the shaft member 58 is moved, the shaft member 58 is rotated and the cam plate 60 is swung. As the cam plate 60 swings, the reinforcing plate 50 swings. Since the seat cushion 32 is pushed up by the reinforcing plate 50, the same effect as in the first embodiment can be obtained.

Further, in this embodiment, since tension is applied directly from both the shoulder webbing portion and the lap webbing portion, an additional effect is added that the rocking reaction of the reinforcing plate 50 is quick.

FIG. 6 shows a modification of the second embodiment, which differs in that the arm 62 is fixed to the vehicle body via a pin 66 and that the tension coil spring 38 is eliminated. There is. In this case,
In the normal state of the vehicle, the arm 62 is fixed by the pin 66 and does not swing; however, in the emergency state of the vehicle, a large shearing load is applied to the pin 66 and the pin 66 is sheared, and the rest is the same as in the second embodiment. act.

In each of the first to third embodiments described above, either the anchor plate 20 or the buckle device 28 is fixed, and the other is fixed to the webbing 10.
Although only one embodiment has been shown in which the anchor plate 20 and the buckle device 28 are movable by being pulled by the anchor plate 20, it is also possible to implement an embodiment in which the fixed/movable relationship between the anchor plate 20 and the buckle device 28 in each embodiment is reversed.

[Effects of the invention] As explained above, the seat belt device according to the invention is arranged at the center below the seat cushion of the passenger seating seat, and one end is rotatably supported on the rear bottom surface of the seat cushion. A plate-shaped seat cushion reinforcing member whose other end is located near the front bottom surface of the seat cushion, and a shaft provided below the seat cushion reinforcing member and rotatably supported on the vehicle floor. a branch, a push-up part that is located under the other end of the seat cushion reinforcing member and pushes up the other end of the seat cushion reinforcing member by rotating around the pivot branch, and a webbing for restraining an occupant, which is connected in case of a vehicle emergency. Since it has a connection part that rotates the push-up part by being pulled by this occupant restraint webbing, and a push-up means including It has the excellent effect of preventing the sink from sinking deeply into the sink.

[Brief explanation of the drawing]

1 to 3 show a first embodiment of the seat belt device according to the present invention, FIG. 1 is a front view of the seat cushion in cross section, FIG. 2 and FIG.
The figure is a side view of the seat cushion when it is cut away, Figure 3 is an exploded perspective view of the main parts, and Figures 4 to 5 are
The figure shows the second embodiment, FIGS. 4 and 4A are side views of the seat cushion after being cut away, FIG. 5 is an exploded perspective view of the main parts, and FIG. 6 is the second embodiment. FIG. 6 is an exploded perspective view corresponding to FIG. 5 showing a modification of FIG. 10...Webbing (webbing for occupant restraint),
18... Seat (passenger seating seat), 22...
Arm (push-up means), 26...floor (vehicle floor),
30... Attachment part (shaft support of push-up means), 32...
Seat cushion, 40... Reinforcement plate (seat cushion reinforcing member), 42... Mounting portion (one end of the seat cushion reinforcing member), 50... Reinforcement plate (seat cushion reinforcing member), 52... Shaft Rod (one end of the seat cushion reinforcing member), 58... shaft member (shaft support of the pushing up means), 60... cam plate (boosting part of the pushing up means), 62... arm (connection part of the pushing up means).

Claims (1)

[Scope of Claim for Utility Model Registration] Disposed at the center below the seat cushion of a passenger seating seat, one end of which is rotatably supported on the rear bottom surface of the seat cushion, and the other end of which is rotatably supported on the front bottom surface of the seat cushion. A plate-shaped seat cushion reinforcing member located nearby; a shaft support provided below the seat cushion reinforcing member and rotatably supported on the vehicle floor; and the other end of the seat cushion reinforcing member. A push-up part located on the lower side that pushes up the other end of the seat cushion reinforcing member by rotating around the shaft support is connected to the occupant restraint webbing and is towed by the occupant restraint webbing in the event of a vehicle emergency. A seatbelt device comprising: a connection portion for rotating the push-up portion; and push-up means.