JPS6234851Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a seat belt device that restrains and protects an occupant in the event of a vehicle emergency, and particularly considers the possibility of automatically attaching the restraint webbing after the occupant gets into the vehicle. The present invention relates to a seat belt device.

[Conventional technology]

2. Description of the Related Art A seatbelt device has been proposed in which an end portion of a webbing for restraining an occupant is moved by a driving means after the occupant gets on the vehicle to automatically set the webbing in a state in which the webbing is attached.

This seatbelt device automatically puts the webbing on the occupant after the occupant gets into the vehicle by moving the webbing end using the driving force of a motor, or by attaching the webbing end to the door and using the door as a driving means. As a result, the occupant is always wearing the webbing while driving, improving the safety of the occupant.

[Problem that the invention attempts to solve]

However, in this automatic seat belt device, the webbing moves significantly from the state in which the occupant wears the webbing to the state in which it is released, so the amount of winding by the winding device that winds up the end of the webbing tends to increase. . Therefore, when a large tension is applied to the webbing during a vehicle emergency, the webbing wound around the take-up shaft becomes tightly wound, causing problems such as the webbing being stretched out from the take-up shaft by a corresponding length. become. Further, although the operating conditions for the preloader means are set so that they operate in the event of a high-speed collision, it is necessary to ensure safety by ensuring that the occupant is restrained by the webbing even in a low-speed collision in which the preloader means does not operate.

The present invention has been developed in consideration of the above facts, and without impairing the function of an automatically installed seatbelt device, the webbing end can be properly engaged with the end of the webbing as it moves as the occupant gets on and off the vehicle. In an emergency (high-speed collision), this webbing end can be moved to apply a preload to the restraint webbing to tightly restrain the occupant, and in the case of a low-speed collision when the preloader does not work, the webbing tension is supported by the center pillar. It is an object of the present invention to provide a seat belt device that is designed to ensure that the occupant is restrained by the webbing.

[Means for solving problems]

In order to achieve the above object, the seat belt device according to the present invention includes an anchor plate attached to the end of the webbing for restraining an occupant, and an anchor plate that is driven in the direction of attaching the webbing after the occupant gets on the vehicle, and an anchor plate when the occupant gets off the vehicle. The anchor plate includes a drive means for driving the plate in the webbing release direction, and a preloader means for driving the connecting rod in case of a vehicle emergency, and an insertion portion provided on the anchor plate is provided between the anchor plate and the preloader means. When the webbing is moved in the webbing mounting direction, the connecting rod is inserted into a loop portion provided at the tip of the connecting rod, and when the connecting rod is driven, the loop portion engages with the insertion portion to transmit the moving force of the connecting rod to the anchor plate. The vehicle is further provided with a locking means that supports the anchor plate to the center pillar and allows the anchor plate and the loop portion to move only toward the rear of the vehicle when the preloader means is activated. .

[Effect]

In such a configuration, the anchor plate and the preloader means are connected via the coupling means consisting of a combination of the insertion portion provided on the anchor plate and the loop portion provided at the tip of the connecting rod, and further, the A locking means is provided that supports the anchor plate to the center pillar and allows the anchor plate and the loop portion to move only toward the rear of the vehicle when the preloader means is activated.
Therefore, in the event of a high-speed collision in which the connecting rod is driven by the driving force of the preloader, the loop portion engages with the insertion portion, transmitting the moving force of the connecting rod to the anchor plate, and generating a preload on the webbing. Even in a low-speed collision in which the preloader does not act, the webbing tension is reliably supported to the vehicle body by the locking means that locks the anchor plate to the center pillar, and the restraint of the occupant by the webbing is ensured.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

In the first embodiment of the present invention shown in FIG.
2 and lap webbing 14, the seat belt is configured to be in a three-point seatbelt wearing state.

The outer end of the shoulder webbing 12 is connected to the vehicle rear end of the door 16 and near the upper end via the anchor plate 18 and to the lap webbing 1.
The outer ends of No. 4 are attached to the rear end of the vehicle and near the lower end of the door 16 via anchor plates 20, respectively.

Further, the inner end of the lap webbing 14 is sewn to the middle part of the shoulder webbing 12, and the inner end of the shoulder webbing 12 is wound up on a winding device 22 provided at approximately the center of the vehicle. This winding device 22 winds up the shoulder webbing 12 with a biasing force and always applies a predetermined tension to the shoulder webbing 12, but in the event of a vehicle emergency, the unwinding of the shoulder webbing 12 is stopped by the operation of the acceleration sensor. Built-in inertia lock mechanism.

Therefore, in this embodiment, the door 16 serves as a webbing driving means, and when the door 16 is opened as shown in the driver's seat in FIG. Accordingly, the seat 10 is moved toward the front of the vehicle to form a riding space for the occupant between the seat 10 and the seat 10. Furthermore, if the door 16 is closed after the occupant has taken a seat on the seat 10, the outer ends of the webbings 12 and 14 will move toward the rear of the vehicle in accordance with the circular arc movement of the door 16, as shown in the passenger seat of FIG. The intermediate portions of the webbings 12 and 14 can be automatically attached.

Next, the anchor plate 18 attached to the outer end of the shoulder webbing 12 and the door 1
6 will be explained with reference to FIGS. 2 to 4. As shown in detail in FIGS. 3 and 4, a pair of bolts 26 are attached to the window frame 24 of the door 16.
One side of the L-shaped anchor plate 28 is fixed. To attach the bolt 26 to the window frame 24, the bolt 26 passes through the L-shaped anchor plate 28 and the window frame 24 from the rear of the vehicle and is screwed into the nut 30 welded to the front side of the vehicle (in the direction of arrow A) of the window frame 24. This is done by combining the Therefore, the axes of the pair of bolts 26 are both horizontal and oriented in the longitudinal direction of the vehicle.

On the other hand, the other side of the L-shaped anchor plate 28 extends along the longitudinal direction of the vehicle, and its tip is inverted to form a bent portion 31, forming a locking means between the L-shaped anchor plate 28 and the anchor plate 18. This bent portion 31
A cut-and-raised portion 18A formed on the anchor plate 18 is inserted between the L-shaped anchor plate 28 and the L-shaped anchor plate 28 and the bent portion 31 sandwich the cut-and-raised portion 18A with a predetermined pressure. The cut-and-raised portion 18A and the anchor plate 18 sandwich the bent portion 31 with a predetermined pressure. Therefore, the anchor plate 18 does not move relative to the L-shaped anchor plate 28 when the vehicle is normally running, and the anchor plate 18 does not move relative to the shoulder webbing 12 in the event of a vehicle emergency.
When a load is generated that moves toward the front of the vehicle under tension, this load is transmitted to the L-shaped anchor plate 28 via the bent portion 31. However, when the anchor plate 18 is subjected to an external force toward the rear of the vehicle, the cut-and-raised portion 18A connects to the bent portion 31 and the L-shaped anchor plate 28.
It is now possible to slip out between the two and move to the rear of the vehicle.

As shown in FIG. 5, the enlarged head 32 of the bolt 26 corresponds to the holder 34. This holder 34 has a substantially U-shaped planar shape, and when the door is closed, the bolt 26 is inserted into a pair of U-shaped grooves 36 formed on one side of the holder 34, and the enlarged head 32 is housed in the holder 34. It's becoming like that.

This holder 34 is fixed to the front side of the vehicle center pillar 40 with bolts 38. Therefore, when the enlarged head 32 moves toward the front of the vehicle in a vehicle emergency, it engages with the holder 34 to limit the amount of deformation of the window frame 24 to a predetermined value or less, and to support the tension of the shoulder webbing 12 to the center pillar 40. It's getting old.

Next, as shown in FIG. 2, a preloader device 46 is provided inside the vehicle body roof side member 44, so that a preload can be applied to the shoulder webbing 12 in the event of a vehicle emergency.

As shown in FIG. 6, this preloader device 4
6, a cylinder 48 which is open at the front of the vehicle is fixed to the roof side member 44 by a pair of brackets 50, and its axis is directed in the longitudinal direction of the vehicle. A cylinder head 52 that is screwed into the front end of the cylinder 48 contains gunpowder 54, and this gunpowder 54 is connected to an acceleration sensor (not shown) and explodes when the vehicle collides with the vehicle at a relatively high speed. This explosive force is applied to the piston 56 in the cylinder to move the piston 56 toward the rear of the vehicle.

A shaft 58 is loosely fitted into the axial center of the piston 56 and is capable of relative rotation and relative movement in the axial direction, and a coil spring 60 housed in the cylinder 48 is fitted into the axial center of the shaft 58. The extension portion 62 is threadedly engaged to move together with the shaft 58.

A cylindrical member 64 is fitted into the extended end 62 of the coil spring 60, and a shear pin 66 is interposed between the cylindrical member 64 and the piston 56. This shear pin 66
is formed on the outer periphery of the cylindrical member 64 and is sheared when a vehicle longitudinal direction load of a predetermined value or more is applied between the cylindrical member 64 and the piston 56, allowing the cylindrical member 64 to move forward of the vehicle relative to the piston 56. The tapered portion 68 allows the pin 70 to protrude in the radial direction of the piston 56. Therefore, the tip of the pin 70 bites into the inner peripheral surface of the cylinder 48 to stop the movement of the piston 56.

A circular hole 72 is bored in the other end of the shaft 58 that is fixed to the piston 56, and extends through the cylinder head 52 and projects toward the front of the vehicle. After one end of a connecting rod 74 made of a flexible wire is inserted into the circular hole 72, pressure is applied in the radial direction to force the connecting rod 74 into the shaft 58.

As shown in FIGS. 2 and 3, the intermediate portion of the connecting rod 74 extends downward in front of the vehicle and connects to the shear pin 7.
6 is guided into the recess 80 through an opening 79 of a guide 78 attached to the center pillar 40. Within this recess 80, the connecting rod 74 is connected to the loop portion 82.
The tip of the connecting rod 74 passes through the opening 79 and exits the guide 78.
It is fixed together with the intermediate portion of the connecting rod 74 by a block 84.

As shown in FIG. 3, the loop portion 82 in the guide 78 has its axis horizontal and facing toward the vehicle, and when the door 16 is closed, the insertion portion 86 of the anchor plate 18 that protrudes toward the inside of the vehicle is inserted. It is now being inserted. As shown in FIG. 4, the tip of this insertion portion 86 is a hook portion 88 bent toward the front of the vehicle, and the loop portion 82 is bent toward the front of the vehicle in case of a vehicle emergency.
This ensures reliable engagement.

The recessed portion 80 of the guide 78 is a tapered portion 9 whose inner diameter is gradually reduced toward the preloader device 46.
0 is set. A reinforcing member 92 made of thin-walled steel is attached to the surfaces of the tapered portion 90 and the opening 79 so as to correspond to the outer periphery of the loop portion 82 . The loop portion 82 is engaged with the outer periphery, and the loop portion 82 is contracted and deformed to be engaged with the horizontal shaft portion 86 .

The operation of this embodiment configured in this way will be explained.

As shown in the driver's seat in Figure 1, the occupant
When the door is opened, the shoulder webbing 12 and the lap webbing 14 move toward the front of the vehicle in accordance with the circular arc movement of the door, and a riding space is formed between them and the seat 10. Passengers sit in seat 10 and then open door 1.
6 is closed, the webbings 12 and 14 will again move toward the rear of the vehicle in accordance with the closing arc movement of the door, so that the webbings 12 and 14 will be attached to the passenger seated on the seat 10 as shown in the passenger seat in FIG. can automatically put on a three-point seat belt. When the door is closed, the insertion portion 86 of the anchor plate 18 is inserted into the loop portion 82 as shown in FIGS. 3 and 4.

When the vehicle is in a collision at a relatively low speed, the acceleration sensor that activates the preloader device 46 does not operate, but the occupant moves in the direction of the collision due to inertia. Therefore, due to this inertial force, shoulder webbing 1
A large tension is generated in the webbing 2, but this webbing tension is caused by the cut-out portion 18A of the anchor plate 18.
and is transmitted to the L-shaped anchor plate 28 via the bent portion 31. Therefore, the window frame 24 to which the L-shaped anchor plate 28 is attached deforms toward the front of the vehicle, but after a slight deformation, the window frame 24
Since the enlarged head 32 of the bolt 26 fixed to the seat engages with the holder 34, the webbing tension is reliably supported to the center pillar 40 via the holder 34, ensuring the occupant's restraint and safety.

When the vehicle is in a relatively high-speed collision, an acceleration sensor (not shown) activates the preloader device 4.
Gunpowder 54 in 6 explodes. This causes the piston 56 to move toward the rear of the vehicle, causing the shaft 58 to drive the connecting rod 74 toward the rear of the vehicle, and the loop portion 82 engages with the insertion portion 86 in response.

In this case, the loop portion 82 engages with the tapered portion 90 through the reinforcing plate 92 during movement, so its inner diameter is reduced, and the loop portion 82 reliably engages with the insertion portion 86 to transfer the driving force of the preloader device 46 through the insertion portion 86. and is transmitted to the anchor plate 18.

As a result, the cut-out portion 1 of the anchor plate 18
8A is the L-shaped anchor plate 28 and the bent part 31
Escape from between the guide 7 and move to the rear of the vehicle.
8 shears the shear pin 76. Therefore, the outer end of the shoulder webbing 12 moves toward the rear of the vehicle, eliminating the slack between the webbing and the occupant, allowing the occupant to tightly fit the webbing.

At the same time, the take-up device 22 suddenly stops unwinding the shoulder webbing 12 due to the activation of the inertia lock mechanism, so that the occupant who is wearing the webbing tightly is securely restrained by the shoulder webbing 12 and the wrap webbing 14. safety is guaranteed.

When the driving force of the preloader device 46 described above, that is, the explosive force of the gunpowder 54 is large, the relative moving force between the piston 56 and the cylindrical member 64 becomes large as shown in FIG. 6, so that the shear pin 66 is sheared. ,
The tapered portion 68 of the cylindrical member 64 pushes the pin 70 radially into engagement with the inner circumferential surface of the cylinder 48 . Therefore, it is possible to eliminate the possibility that the piston 56 will stop moving and apply an abnormal compressive force to the occupant. Further, when a large tension is generated in the shoulder webbing 12 due to the inertia of the occupant, this tension is transferred to the coil spring 60 via the connecting rod 74 and the shaft 58.
As the coil spring 60 passes through the cylindrical member 64 while being deformed, the kinetic energy of the occupant is absorbed.

Next, FIGS. 7 and 8 show a second embodiment of the present invention. In this embodiment, the anchor plate 18
is locked to the L-shaped anchor plate 28 via an anchor pin 94. This anchor pin 94
As shown in FIG. 9, the cross section perpendicular to the axis of the anchor plate 28 has an oval shape and passes through the L-shaped anchor plate 28, and an elongated hole 96 is bored in the anchor plate 18 corresponding to this shaft portion. ing. Therefore, the anchor plate 18 is configured not to rotate relative to the anchor pin 64 and the L-shaped anchor plate 28, but the anchor plate 18 moves relative to the shaft of the anchor pin 94 and communicates with the end of the elongated hole 96. When the circular hole 98 corresponds to the shaft portion of the anchor pin 94, the anchor plate 18 can rotate relative to the L-shaped anchor plate 28. Further, this circular hole 98 has a larger diameter than the head of the anchor pin 94, and the anchor pin 94 can pass through this circular hole 98, so that the anchor plate 18 can move relative to the L-shaped anchor plate 28. It is designed so that it can fall off from the L-shaped anchor plate 28.

In addition, in this embodiment, an insertion shaft portion 100 is formed in place of the insertion portion 86 in the previous embodiment,
The distal end of the insertion shaft 100 has an enlarged head 102.
is formed and has the same role as the previous embodiment.

Even in the second embodiment of the present invention constructed in this way, the anchor plate 1 is
8 is engaged with the anchor pin 94 and is prevented from moving forward of the vehicle, and the anchor plate 18
Since it is also impossible to rotate the webbing 12, the occupant can automatically attach and release the webbing 12 by opening and closing the door 16.

Furthermore, in a low-speed vehicle collision, the tension acting on the shoulder webbing 12 is transmitted to the holder 34 via the anchor plate 18, anchor pin 94, L-shaped anchor plate 28, and bolt 26, so that the webbing tension is reliably maintained. It is transmitted to the center pillar 40, and the restraint state of the occupant can be maintained.

Furthermore, in a high-speed collision state of the vehicle, the connecting rod 74 driven by the preloader engages with the insertion shaft 100 and moves the anchor plate 18 toward the rear of the vehicle, so that the enlarged head 102 of the anchor plate 18 corresponds to the anchor pin 94. As the anchor pin 94 passes through the circular hole 98, the anchor plate 18 falls off from the L-shaped anchor plate 28 and is driven toward the rear of the vehicle, and the webbing 12 comes into close contact with the occupant, ensuring a tight restraint of the occupant. can do.

Next, FIGS. 10 and 11 show a third embodiment of the present invention.

In this embodiment, the anchor plate 18 is locked to the L-shaped anchor plate 28 via a shear pin 104, unlike the previous embodiment. This shear pin 104 locks the anchor plate 18 to the L-shaped anchor plate 28 so that it does not move or rotate relative to the L-shaped anchor plate 28 when the vehicle is normally running, but if a large relative movement force is generated between the two in the longitudinal direction of the vehicle, the shear pin 104 will shear. The anchor plate 18 is made to fall off from the L-shaped anchor plate 28.

Also, in this embodiment, unlike the previous embodiments, the L-shaped anchor plate 28 is not provided with a means for supporting the anchor plate 18 to the center pillar 40, but instead is fixed to the intermediate portion of the connecting rod 74. A block 108 projects from the block 106 towards the front of the vehicle. This hook 108
is the cut hole 1 drilled in the center pillar 40
It has been inserted into 10.

Therefore, in this embodiment, when the vehicle is in a low-speed collision state, the webbing tension shears the shear pin 104, the anchor plate 18 moves forward of the vehicle and engages the loop portion 82, and the webbing tension passes through the block 106 to the center pillar 40. is gaining support.

In addition, in a high-speed collision state, the hook 108 slips out of the cut-out hole 110 and moves toward the rear of the vehicle by the driving force of the connecting rod 74, so the loop portion 82 engages with the insertion shaft portion 100 and moves the anchor plate 18 toward the rear of the vehicle. The webbing 12 is moved to generate a preload on the webbing 12.

Although each of the above-mentioned embodiments has been described as an example in which a preload is generated on the shoulder webbing, the present invention is not limited to these embodiments, but can be applied to a device that generates a preload on other restraint webbing such as a lap webbing. Needless to say. Furthermore, in each of the above embodiments, a seat belt device was described in which one end of the webbing is attached to a door and the webbing is automatically attached to the occupant using the opening/closing force of the door, but a driving force from a motor or the like is applied to one end of the webbing. Naturally, the present invention can also be applied to a seat belt device that forcibly moves the webbing to make the occupant wear the webbing.

[Effect of idea]

According to the present invention, between the anchor plate attached to the end of the webbing for occupant restraint and the preloader means for driving the connecting rod in case of a vehicle emergency, the insertion portion provided on the anchor plate and the preloader means provided at the tip of the connecting rod are provided. Since the coupling means is provided in combination with the loop part, when the preloader means is activated (during high-speed collision), the loop part is engaged with the insertion part to transmit the moving force of the connecting rod to the anchor plate and to the webbing. In addition to being able to generate preload, even in low-speed collision situations where the preloader does not operate, the locking means that locks the anchor plate to the center pillar ensures that the webbing tension is supported to the vehicle body, preventing the webbing from restraining the occupant. can be secured.

[Brief explanation of drawings]

Figure 1 shows the first seatbelt device according to the present invention.
FIG. 2 is a side view of the driver's seat side viewed from inside the vehicle; FIG. 3 is a partially enlarged view of FIG. 2; FIG. 5 is an exploded perspective view showing the relationship between the holder 34 and the bolt 38, FIG. 6 is a sectional view of the preloader device, FIG. 7 is a sectional view corresponding to FIG. 3 showing the second embodiment of the present invention, and FIG. 8 is a cross-sectional view taken along the line shown in FIG. 7, FIG. 9 is a cross-sectional view taken along the line taken from FIG. 8, FIG. 10 is a cross-sectional view corresponding to FIG. 3 showing the third embodiment of the present invention, and FIG. FIG. 10 is a sectional view taken along the line XI-XI. 12... Shoulder webbing, 14... Lap webbing, 16... Door, 18... Anchor plate, 18A... Cut-and-raised portion, 28... L-shaped anchor plate, 31... Bending portion, 40...
...Center pillar, 46...Preloader device, 5
4... Gunpowder, 74... Connecting rod, 82... Loop part, 86... Insertion part, 100... Insertion shaft part, 10
6...Block, 108...Hook, 110...
Cut hole.

Claims (1)

[Scope of utility model registration request] An anchor plate attached to an end of the webbing for restraining an occupant; a driving means for driving the anchor plate in the webbing attaching direction after the occupant gets on the vehicle; and driving the anchor plate in the webbing unattaching direction when the occupant gets off the vehicle; and a preloader means for driving a connecting rod, wherein an insertion portion provided on the anchor plate is provided between the anchor plate and the preloader means, and a loop provided at the tip of the connecting rod when the anchor plate moves in the webbing attaching direction. a coupling means for engaging the insertion portion and transmitting the moving force of the connecting rod to the anchor plate when the connecting rod is driven by the connecting rod, and further supporting the anchor plate to the center pillar; A seat belt device comprising a locking means that allows the anchor plate and the loop portion to move only toward the rear of the vehicle when the preloader means is activated.