JP3372888B2 - Vehicle seat belt device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention operates a pretensioner for retracting a seat belt for a driver when a rear collision predicting means detects that a rear collision may occur in a vehicle. The present invention relates to a vehicle seatbelt device including a control unit that controls the above-described manner.

[0002]

2. Description of the Related Art Conventionally, as disclosed in, for example, Japanese Unexamined Patent Publication No. 6-286581, a seat belt that can be worn by an occupant seated on a seat and the seat belt is wound from an initial position by inputting an operation signal. The first pretensioner mechanism that generates the tension of 1 and restrains the occupant within the range in which the operation for avoiding the vehicle collision can be performed, and the seat belt in the first tension state is wound by the actuation signal input to wind the first pretensioner mechanism. A second pretensioner mechanism that generates a tension of 2 and restrains an occupant against a vehicle collision, and a first command that predicts a collision of the vehicle and outputs an operation command signal to the first pretensioner mechanism. There is known a vehicle seatbelt device including a means and a second command means for determining a collision of the vehicle and outputting an operation command signal to the second pretensioner mechanism.

[0003]

In the case where the first pretensioner is actuated to wind up the seat belt at the time when the collision of the vehicle is predicted as described above, the occupant and the seat are separated. By minimizing the distance, it has the advantage of protecting the occupants, but on the other hand, when the host vehicle is running, there is a possibility that a rear collision will occur in the host vehicle due to the presence of obstacles behind the host vehicle. Is judged,
There is a problem in that the first pretensioner is activated and the body of the occupant is unnecessarily restrained and the occupant is likely to feel uncomfortable.

That is, when the host vehicle is running, there is a possibility that the host vehicle can be operated to avoid a rear collision even if there is an obstacle behind the host vehicle. When the driver's seat belt is wound up by operating the pretensioner according to the detection signal of the obstacle sensor that detects the obstacle located on the rear side of the host vehicle, the driver's body becomes unnecessary. You will be restrained and feel uncomfortable. Moreover, it is known that a rear collision that needs to protect an occupant often occurs when the host vehicle is stopped.

In view of such circumstances, the present invention is necessary without giving a feeling of discomfort to the driver when the rear-collision predicting means detects that a rear-collision may occur in the vehicle. (EN) A vehicle seat belt device capable of effectively protecting a driver at times.

[0006]

The invention according to claim 1 is
For vehicles equipped with control means for controlling to operate the pretensioner for retracting the seat belt for the driver when the rear collision prediction means detects that a rear collision may occur in the vehicle. A seat belt device,
Vehicle speed detecting means for detecting the traveling speed of the own vehicle, and regulation for restricting the operation of the pretensioner when the vehicle speed detecting means detects that the traveling speed of the own vehicle is equal to or higher than a preset reference vehicle speed. And means.

With the above arrangement, when the rear-collision predicting means detects that there is a possibility of a rear-collision occurring in the own-vehicle, the traveling speed of the own-vehicle is previously determined according to the detection signal from the vehicle-speed detecting means. When it is determined whether or not the vehicle speed is equal to or higher than the set reference vehicle speed, and it is confirmed that the vehicle is traveling at the reference vehicle speed or higher, the operation of the pretensioner is restricted by the restricting means, so that it is installed in the driver's seat. The winding of the seat belt thus restrained is suppressed.

According to a second aspect of the invention, in the vehicle seat belt device according to the first aspect, the regulating means is
The operation of the pretensioner is restricted on the condition that the host vehicle is in the forward traveling state.

According to the above configuration, when the rear collision predicting means detects that a rear collision may occur in the own vehicle during forward traveling of the own vehicle, the vehicle speed detecting means responds to the detection signal. It is determined whether or not the traveling speed of the host vehicle is equal to or higher than a preset reference vehicle speed, and when it is confirmed that the traveling speed is equal to or higher than the reference vehicle speed, the operation of the pretensioner provided in the driver's seat is controlled by the regulation means. The restraint of the driver restrains the posture of the driver from being unnecessarily restrained by the seat belt.

According to a third aspect of the present invention, in the vehicle seat belt device according to the first or second aspect, the restricting means sets the traveling speed of the host vehicle equal to or higher than the reference vehicle speed preset by the vehicle speed detecting means. Is detected,
The seat belt retracting force by the pretensioner is reduced.

According to the above configuration, when the rear-collision predicting means detects that a rear-collision may occur in the own-vehicle, the traveling speed of the own-vehicle is determined according to the detection signal from the vehicle-speed detecting means. When it is determined whether or not the vehicle speed is equal to or higher than a preset reference vehicle speed, and it is confirmed that the vehicle is running at a speed equal to or higher than the reference vehicle speed, the winding force of the pretensioner is reduced by the restricting means, The seat belt will be rolled up with less force than when.

According to a fourth aspect of the present invention, in the vehicle seat belt device according to the first or second aspect, the restricting means sets the traveling speed of the own vehicle equal to or higher than the reference vehicle speed preset by the vehicle speed detecting means. Is detected,
The operation of the pretensioner is prohibited.

According to the above structure, when the rear-collision predicting means detects that a rear-collision may occur in the own-vehicle, the traveling speed of the own-vehicle is determined according to the detection signal from the vehicle-speed detecting means. If it is determined whether or not the vehicle speed is equal to or higher than a preset reference vehicle speed, and it is confirmed that the vehicle is traveling at a speed equal to or higher than the reference vehicle speed, the restricting means prohibits the pretensioner from being wound up, so Is restrained by the seat belt.

According to a fifth aspect of the present invention, in the vehicle seat belt device according to the first or second aspect, the control means operates the pretensioner based on the rear collision occurrence probability detected by the collision prediction means. In addition to determining whether the pretensioner is actuated, the vehicle speed detection unit detects whether the traveling speed of the host vehicle is equal to or higher than a preset reference vehicle speed. The reference value of the rear-end collision occurrence probability, which is the reference, is increased and corrected.

According to the above construction, it is determined whether or not the traveling speed of the host vehicle is equal to or higher than the preset reference vehicle speed according to the detection signal of the vehicle speed detecting means, and the vehicle is in a traveling state equal to or higher than the reference vehicle speed. When it is confirmed that the reference value of the rear collision occurrence probability is increased and corrected by the restricting means. Then, the operation of the pretensioner is regulated and the winding of the seat belt is suppressed until the probability of occurrence of a rear collision detected by the rear collision predicting means exceeds the reference value that has been increased and corrected.

The invention according to claim 6 is the above-mentioned claims 1 to 4.
In the vehicle seat belt device according to any one of items 1 to 5, the restriction means is configured to increase the degree of operation restriction of the pretensioner as the traveling speed of the host vehicle detected by the vehicle speed detection means increases. Is.

According to the above configuration, at the time when the rear-collision predicting means detects that a rear-collision may occur in the own-vehicle, the traveling speed of the own-vehicle is previously determined according to the detection signal from the vehicle-speed detecting means. If it is determined whether the vehicle speed is equal to or higher than the set reference vehicle speed, and it is confirmed that the vehicle is running at the reference vehicle speed or higher, the pretensioner operation restriction corresponding to the traveling speed of the host vehicle is executed, When the traveling speed is high, the winding force of the seat belt is greatly reduced as compared with the case where the traveling speed is low.

The invention according to claim 7 is the above-mentioned claims 1 to 6.
In the vehicle seat belt device according to any one of the above, a front-collision predicting unit that outputs a front-collision predicting signal by detecting that a front-collision may occur in the host vehicle is provided, and from the front-collision predicting unit, When the pre-collision prediction signal is output, without restricting the operation of the pretensioner by the restriction means,
The pretensioner is operated by the control means.

According to the above construction, when it is detected by the front collision prediction means that a front collision may occur in the host vehicle, the pretensioner operation is not restricted by the restriction means. When the front collision prediction signal is output from the front collision prediction means, the pretensioner is activated and the seat belt is wound up with a predetermined winding force.

According to the eighth aspect of the present invention, the pretensioner for retracting the seat belt for the driver is operated at the time when the rear collision predicting means detects that a rear collision may occur in the vehicle. A vehicle seatbelt device having control means for controlling the vehicle, wherein the vehicle is in a turning state according to a turning detection means for detecting a turning state of the host vehicle and a detection signal of the turning detection means. In this case, a regulating means for regulating the operation of the pretensioner is provided.

According to the above construction, when the rear-collision predicting means detects that there is a possibility of a rear-collision occurring in the own-vehicle, the own-vehicle is in a predetermined turning state in accordance with the detection signal from the turning detection means. If it is confirmed that the above condition is satisfied, the operation of the pretensioner is restricted by the restricting means, so that the winding of the seat belt provided in the driver's seat is suppressed.

According to a ninth aspect of the invention, in the vehicle seat belt device according to the eighth aspect, the regulating means is
The seat belt retracting force by the pretensioner is set according to the turning state detected by the turning detection means.

According to the above construction, at the time when the rear collision predicting means detects that a rear collision may occur in the vehicle, the rear collision detecting means detects the turning state of the own vehicle according to the turning state. The operating state of the pretensioner is controlled so that the seat belt is wound by the winding force set by the restricting means.

According to the tenth aspect of the present invention, the pretensioner for retracting the seat belt for the driver is operated at the time when the rear collision predicting means detects that a rear collision may occur in the host vehicle. A vehicle seatbelt device including control means for controlling the vehicle speed, the vehicle speed detecting means for detecting a traveling speed of the own vehicle, the turning detecting means for detecting a turning state of the own vehicle, the vehicle speed detecting means and the turning. And a restricting unit that restricts the seat belt retracting force of the pretensioner according to a detection signal from the detecting unit.

According to the above construction, when the rear-collision predicting means detects that a rear-collision may occur in the own-vehicle, the traveling speed of the own-vehicle and the turning detection means detected by the vehicle-speed detecting means. The control of restricting the retracting force of the seat belt according to the turning state of the vehicle detected by the control means executes the restricting means, thereby suppressing the retracting of the seat belt provided in the driver's seat. become.

The invention according to claim 11 is the above-mentioned claim 1
10. The vehicle seat belt device according to any one of 10), further comprising operation control means for restricting the operation of the driving operation means by the driver when the pretensioner is activated and maintaining the current operation state. It is a thing.

With the above arrangement, when the rear-collision predicting means detects that a rear-collision may occur in the vehicle, the pretensioner is activated to wind the seat belt. In this case, the operation control means limits the operation of the driving operation means by the driver, so that a sudden change in the operating state of the driving operation means is prevented.

[0028]

1 and 2 show an embodiment of a vehicle seat belt device according to the present invention. This vehicle seat belt device includes a driver's seat 4 having a seat cushion 1, a seat back 2, and a headrest 3, a seat belt 5 for restraining the body of a driver seated on the seat 4, and a seat belt 5 The pretensioner 6 that drives the seat belt 5 in a direction in which the driver is held by winding up the vehicle, and an obstacle behind the vehicle is detected to detect that a rear collision may occur in the vehicle. It is output from the rear-end collision predicting means 7, the front-end collision predicting means 8 that detects an obstacle in front of the own-vehicle and detects that a front-end collision may occur in the own-vehicle, and the rear-end collision predicting means 7. A control means 9 for controlling the pretensioner 6 to operate in response to a rear collision prediction signal, and a vehicle speed detection means 10 for detecting the traveling speed of the vehicle.

As shown in FIG. 3, the pretensioner 6 has a take-up reel 11 for winding the seat belt 5 with a predetermined spring force, a pinion gear 12 connected to a drive shaft of the take-up reel 11, A rack gear 13 that rotationally drives the pinion gear 12 and a gas generator 14 that drives the rack gear 13 are provided, and the gas generator is generated according to a control signal output from the control means 9 when a vehicle rear collision is predicted. 1
4 is configured to operate. Thereby, a gas pressure for moving the rack gear 13 from the lower standby position to the upper drive position is generated, and the pinion gear 12 is generated.
When the seat belt 5 is wound by the winding reel 11 by rotating the seat belt 5, a predetermined tension is applied to the seat bell 5.

The gas generating means 14 of the pretensioner 6 is constructed so that the winding force of the seat belt 5 can be adjusted by dividing the gas generating means 14 into two parts, and a part of the gas generating means 14 operates. Thus, the seat belt 5 is wound with a small torque, and the seat belt 5 is wound with a large torque by operating all of the gas generating means 14. The above rack gear 1
3 and the gas generator 14 and the like, the take-up reel 11 is driven to rotate by an electric motor to wind up the seat belt 5, thereby giving a predetermined tension to the seat belt 5 and driving torque of the electric motor. The winding force may be adjusted by controlling or the like.

The rear-end collision predicting means 7 detects whether or not there is an obstacle causing a rear-end collision on the rear side of the vehicle in accordance with the output data from the ultrasonic sensor, the infrared sensor, the video camera or the like. When it is confirmed that the obstacle exists, the distance and the relative speed to the obstacle are measured, it is determined that the possibility of collision is high, and the rear collision prediction signal is sent to the control means 9. It is configured to output. For example, when it is detected that another vehicle or the like is approaching to the rear side of the vehicle when the vehicle is moving forward, or when a vehicle is moving backward, a fixed object or a moving object such as another vehicle or the like is approached to the rear side of the vehicle. The rear collision prediction signal is output to the control means 9 when it is detected that the vehicle is starting.

The front collision predicting means 8 is an ultrasonic sensor,
It detects whether or not there is an obstacle that causes a frontal collision in front of the host vehicle according to the detection signal from the infrared sensor or radar, and if it is confirmed that this obstacle is present, the obstacle is detected. The distance to the object and the relative speed are measured, it is judged that the possibility of collision is high, and the front collision prediction signal is sent to the restriction means 15 for restricting the operation of the pretensioner 6 as shown in FIG. It is configured to output. For example,
When it is detected that another vehicle or the like is approaching the front side of the vehicle when the vehicle is stopped, or when the vehicle is moving forward, a fixed object or a moving object such as another vehicle or the like is approached to the front side of the vehicle. When it is detected that the collision is occurring, the preceding collision prediction signal is output to the regulation means 15.

Further, the control means 9 is the rear collision prediction means 7 described above.
When the rear collision prediction signal is output from the vehicle, a command signal for operating the pretensioner 6 is output to wind up the seat belt 5. Further, the control means 9 sets the pretensioner 6 to set the seat belt retracting torque to a small value when the regulation signal is output from the regulation means 15.
Is configured to control the operating state of the.

When it is confirmed that the host vehicle is in the forward traveling state according to the detection signal of the forward traveling detecting means 16 which detects that the vehicle is in the forward traveling state according to the operation position of the shift lever. Further, it is determined whether or not the traveling speed of the own vehicle is in a traveling state equal to or higher than a preset reference vehicle speed according to the detection signal of the vehicle speed detecting means 10, and the traveling speed of the own vehicle is equal to or greater than the reference vehicle speed. When it is confirmed that the vehicle is not in the state, that is, in the stopped state or the retreat state, the regulation signal is output to the control means 9 to regulate the operation of the pretensioner 6.

The regulating means 15 confirms that the traveling speed of the host vehicle is equal to or higher than the preset reference vehicle speed based on the detection signal of the vehicle speed detecting means 10, that is, the host vehicle is in a forward traveling state at a predetermined speed. Even in such a case, when the front collision prediction signal is output from the front collision prediction means 8, the output of the restriction signal is stopped. As a result, at the time of predicting the frontal collision, the control means 9 executes the operation control of the pretensioner 6 that makes the winding torque of the seat belt a large value.

Control means 9 for the vehicle seat belt device
The control operation executed in the above will be described based on the flowchart shown in FIG. When the control operation starts, it is first determined whether or not a rear collision prediction signal is output from the rear collision prediction means 7 (step S1), and when YES is determined, control for activating an alarm means (not shown) is performed. By outputting a signal and activating the alarm means, the driver is informed that a rear collision may occur (step S).
2).

Then, it is determined whether or not the host vehicle is in the forward traveling state according to the detection signal of the forward traveling detecting means 16 (step S3), and it is determined to be NO and it is confirmed that the own vehicle is not in the forward traveling state. If so, the winding torque of the seat belt 5 is set to a large torque and a control signal for operating the pretensioner 6 is output (step S4).

On the other hand, if it is determined YES in step S3 and it is confirmed that the host vehicle is in the forward traveling state, the traveling speed V of the host vehicle is preset according to the detection signal of the vehicle speed detection means 10. It is determined whether the vehicle speed is equal to or higher than the reference vehicle speed R (step S5). N in this step S5
When it is determined to be O and it is confirmed that the host vehicle is in the stopped state or in the extremely low speed traveling state, the process proceeds to step S4, and the control for retracting the seat belt 5 with a large torque by the pretensioner 6 is executed. .

When it is judged YES in step S5 and it is confirmed that the host vehicle is in the forward traveling state at the predetermined speed, it is judged whether or not the front collision prediction signal is output from the front collision prediction means 8. If YES is determined (step S6), the process proceeds to step S4, and the pretensioner 6 controls to wind the seat belt 5 with a large torque.

When it is judged NO in step S6 and it is confirmed that the front collision prediction signal is not output from the front collision prediction means 8, the winding torque of the seat belt 5 wound by the pretensioner 6 is determined. Is set to a small torque and a control signal for operating the pretensioner 6 is output (step S7), and then a collision such as a rear collision or a front collision occurs in the host vehicle in accordance with a detection signal from a collision detection means (not shown). If YES is determined (YES in step S8), the process proceeds to step S4, and the pretensioner 6 controls to retract the seat belt 5 with a large torque.

If it is determined NO in step S8 and it is confirmed that there is no rear-end collision or front-end collision in the vehicle, the process does not proceed to step S4.
It returns as it is. As a result, when it is confirmed that the host vehicle is not in the forward traveling state at the predetermined speed, the pretensioner 6 causes the pretensioner 6 to lift the seat belt 5 at the time when the rear collision prediction signal is output from the rear collision prediction means 7. When it is confirmed that the vehicle is being wound up with torque and the vehicle is in a forward traveling state at a predetermined speed, the pretensioner 6
Is restricted, and the winding torque of the seat belt 5 is set to a small value.

As described above, the control means for controlling the pretensioner 6 for retracting the seat belt 5 to operate when the rear collision predicting means 7 detects that a rear collision may occur in the vehicle. In the vehicle seatbelt device including the vehicle speed detector 9, the vehicle speed detecting means 10 for detecting the traveling speed of the own vehicle, and the vehicle speed detecting means 10 detect that the traveling speed of the own vehicle is equal to or higher than a preset reference vehicle speed. In this case, since the restriction means 15 for restricting the operation of the pretensioner 6 is provided, even when the rear collision prediction means 7 detects that a rear collision may occur in the host vehicle, When it is confirmed that the traveling speed of the host vehicle is equal to or higher than the reference vehicle speed according to the detection signal of the vehicle speed detecting means 10, the pretensioner 6 is controlled by the restricting means 15. By operation is regulated, the seat belt 5 is prevented from being wound on a large torque.

Therefore, since the host vehicle is traveling at the predetermined speed, the rear collision can be avoided in accordance with the operation of the steering wheel by the driver, etc.
When the rear-collision prediction means 7 outputs the rear-collision prediction signal, the pretensioner 6 winds the seat belt 5 with a large torque to unnecessarily restrain the driver's body. It is possible to prevent the driver from feeling uncomfortable or hindering the driving operation.

Then, when it is confirmed that the traveling speed of the host vehicle is lower than the reference vehicle speed according to the detection signal of the vehicle speed detecting means 10, that is, the vehicle is in a stopped state or an extremely low speed running state close to the stopped state. Therefore, when it is confirmed that there is a high possibility that the rear collision cannot be avoided in response to the operation of the steering wheel by the driver, the above-mentioned restricting means 1
Since the operation of the pretensioner 6 is not restricted by 5 and the seat belt 5 is wound up with a large torque, the occupant can be effectively protected from the impact at the time of a rear collision.

In particular, in the above-described embodiment, since the operation of the pretensioner 6 is restricted by the restriction means 15 on the condition that the rearward side of the host vehicle is in a low degree of attention, the vehicle is predetermined. When the vehicle is moving backward at a speed, when the rear-collision prediction means 7 outputs the rear-collision prediction signal, the driver's driving posture is unexpectedly restrained by the seat belt 5 and the driver feels uncomfortable. It can be effectively prevented.

Instead of the above-described embodiment, when the vehicle speed detecting means detects that the traveling speed of the host vehicle is equal to or higher than a preset reference vehicle speed, the restricting means 15 causes the seat belt 5 by the pretensioner 6 to travel. Although it may be configured to prohibit the winding of the seat belt 5, as shown in the above embodiment, the seat belt 5 is prevented by the restricting means 15.
If it is configured to reduce the winding force of the vehicle, the driver's body is unnecessarily restrained at the time when the rear collision predicting means 7 confirms that a rear collision of the host vehicle will occur. While preventing the above, the driver can be effectively protected by winding the seat belt 5 with an appropriate torque.

Further, in the vehicle seat belt device having the control means 9 for judging whether or not the pretensioner 6 is operated based on the rear collision occurrence probability detected by the collision predicting means 7, the vehicle speed detecting means is provided. When the traveling speed of the host vehicle is detected to be equal to or higher than the preset reference vehicle speed, the regulating means 15 determines whether or not the pretensioner 6 is actuated. The operation of the pretensioner 6 may be restricted by increasing and correcting the reference value.

In the case of the above construction, when it is confirmed that the traveling speed of the host vehicle is equal to or higher than the reference value in accordance with the detection signal of the vehicle speed detecting means 10, the rear collision predicting means 7 is used. Until the detected rear collision occurrence probability exceeds the reference value corrected to a large value, the operation of the pretensioner 6 is restricted and the winding of the seat belt 5 is suppressed, so that the driver's body is restrained. Unnecessarily restrained by 5 can be effectively prevented. In addition, when the reference value of the rear collision occurrence probability is increased and corrected, in order to respond to this, the seat belt 5 is promptly actuated.
It is desirable to increase the operating speed of the pretensioner 6.

Instead of the above embodiment, the higher the traveling speed of the host vehicle detected by the vehicle speed detecting means 10,
The regulation degree of the pretensioner 6 by the regulation means 15 may be increased. With such a configuration, at the time when the rear-end collision predicting means 7 detects that a rear-end collision may occur in the own-vehicle, the traveling speed of the own-vehicle in accordance with the detection signal of the vehicle-speed detecting means 10. Is determined to be equal to or higher than a preset reference vehicle speed, and it is confirmed that the vehicle is in a traveling state equal to or higher than the reference vehicle speed,
The pretensioner operation regulation corresponding to the traveling speed of the host vehicle is executed, and when the traveling speed is high, the winding force of the seat belt 5 is greatly reduced as compared with the case where the traveling speed is low. Is large, it is possible to effectively prevent the driver from feeling uncomfortable due to being restrained by the seat bell 5 with a large force.

Further, in the above-described embodiment, the front collision predicting means 8 for detecting the possibility of a front collision occurring in the own vehicle and outputting the front collision predicting signal is provided. When the collision prediction signal is output, the control means 9 operates the pretensioner 6 without restricting the operation of the pretensioner 6 by the restriction means 15. Therefore, the host vehicle is in a traveling state at a predetermined speed. In the case of, the pre-tensioner 6 is actuated with a normal driving force to wind the seat belt 5 at the time when it is confirmed by the front-collision predicting means 8 that a front collision may occur. As a result, the driver can be effectively protected from the impact of a frontal collision.

As shown in FIG. 5, turning detection means 17 including a lateral G sensor or a steering angle sensor for detecting the turning state of the vehicle is provided, and the vehicle is detected according to the detection signal from the turning detection means 17. When it is confirmed that the pretensioner 6 is in the turning state, the regulating means 15 may regulate the operation of the pretensioner 6. With such a configuration, at the time when the rear collision prediction means 7 detects that a rear collision may occur in the own vehicle, the own vehicle is predetermined according to the detection signal of the turning detection means 17. If it is confirmed that the vehicle is in the turning state, the operation of the pretensioner 6 is restricted by the restricting means 15, so that the winding of the seat belt 5 provided in the driver's seat is suppressed.

For example, as shown in FIG. 6, it is judged whether or not a rear collision prediction signal is output from the rear collision prediction means 7 (step S11), and when YES is judged, an alarm means (not shown) is activated. After outputting the control signal to operate and activating the alarm means (step S12), it is determined whether the lateral G detected by the turning detection means 17 is equal to or more than a preset first reference value A1. (Step S13). In step S3, it is determined to be NO and the lateral G is the first reference value A.
If it is confirmed that the vehicle is in a gentle turning state of less than 1 or in a straight traveling state, the winding torque of the seat belt 5 is set to a large torque and a control signal for operating the pretensioner 6 is output (step S14). .

When it is determined YES in step S13 and it is confirmed that the lateral G is the first reference value A1 or more, the lateral G detected by the turning detection means 17 is detected.
Is greater than or equal to the second reference value A2 set to a value greater than the first reference value A1 (step S
15). When it is determined NO in step S15 and it is confirmed that the lateral G is in the intermediate turning state of the first reference value A1 or more and less than the second reference value A2, the seat belt 5 is wound up. A control signal for setting the torque to medium torque and operating the pretensioner 6 is output (step S16).

When it is determined YES in step S15 and it is confirmed that the lateral G is in the sudden turning state of the second reference value A1 or more, the winding torque of the seat belt 5 is set to a small torque. Then, a control signal for operating the pretensioner 6 is output (step S17). As a result, when it is confirmed that the host vehicle is in the gentle turning state or the straight traveling state, the seat belt 5 is moved by the pretensioner 6 at the time when the rear collision predicting means 7 outputs the rear collision predicting signal. When it is confirmed that the host vehicle is wound with a large torque and the vehicle is in a predetermined turning state, the operation of the pretensioner 6 is restricted and the winding force of the seat belt 5 becomes a medium torque or a small torque. Will be set.

In this way, when it is confirmed that the vehicle is in the turning state according to the detection signal of the turning detection means 17,
When the operation of the pretensioner 6 is restricted by the restriction means 15, the host vehicle is in a predetermined turning state and the rear collision is being avoided according to the operation of the steering wheel by the driver or the like. Nevertheless, at the time when the rear-collision prediction means 7 outputs the rear-collision prediction signal, the pretensioner 6 winds up the seat belt 5 with a large torque, and the driver's body is unnecessarily restrained. Can be effectively prevented.

In particular, as shown in the above embodiment, the retracting force of the seat belt 5 by the pretensioner 6 is adjusted according to the turning state detected by the turning detecting means 17, that is, the lateral G or the steering angle. When configured to, while effectively preventing the driver from feeling uncomfortable or hindering the driving operation when turning the vehicle,
There is an advantage that the driver can be appropriately protected by winding the seat belt 5 with an appropriate torque.

Further, when the rear-collision predicting means 7 detects that a rear-collision may occur in the host vehicle, the pre-tensioner 6 for retracting the driver's seat belt is controlled to operate. In the vehicle seat belt device including the control means 9 for controlling the vehicle speed, the vehicle speed detecting means 10 for detecting the traveling speed of the own vehicle, and the turning detecting means 17 for detecting the turning state of the own vehicle, for example, as shown in FIG. Based on a map in which the vehicle speed and the steering angle of the host vehicle are set as parameters, the regulation means 15 detects the winding force of the seat belt 5 by the pretensioner 6 by the vehicle speed detection means 10 and the turning detection means 17. It may be configured to set according to the signal.

The above map shows that the higher the vehicle speed is,
The winding torque of the seat belt 5 is set to a small value so that the pretensioner 6 is remarkably restricted by the restricting means 15. For example, the winding torque is set to a minimum value of 1 when traveling at high speed, and the winding torque is set to a maximum value of 10 when the vehicle is stopped. Further, the map is such that the winding torque of the seat belt 5 is set to a smaller value so that the pretensioner 6 is significantly restricted by the restricting means 15 as the steering angle of the host vehicle is larger. There is.

According to the above-mentioned structure, the traveling speed and the turning of the own vehicle detected by the vehicle speed detecting means 10 are detected at the time when the rear collision predicting means 7 detects that the rear collision may occur in the own vehicle. By controlling the operating state of the pretensioner 6 so that the seat belt 5 is wound up by the winding force set by the regulating means 15 according to the turning state of the vehicle detected by the detecting means 17, While effectively preventing the driver from feeling uncomfortable or hindering the driving operation when turning the vehicle, the pretensioner 6 winds the seat belt 5 with an appropriate torque to optimize the driver. Can be protected.

Further, when the pretensioner 6 is operated, the operation of the driving operation means operated by the driver, for example, the driving operation means comprising a steering wheel, a brake pedal, an accelerator pedal or the like is restricted, and the current operation state is maintained. It may be a structure provided with operation control means for controlling so as to perform. With such a configuration, the pretensioner 6 is activated at the time when the rear collision prediction means 7 detects that a rear collision may occur in the host vehicle. When the operation is performed, the operation of the driving operation means by the driver is restricted by the operation control means, whereby it is possible to effectively prevent a sudden change in the operating state of the driving operation means.

[0061]

As described above, according to the present invention, when the rear collision predicting means detects that there is a possibility of a rear collision occurring in the host vehicle, the seat belt for the driver is retracted. In a vehicle seat belt device having a control means for controlling the tensioner to operate, a vehicle speed detecting means for detecting a traveling speed of the own vehicle, and a reference vehicle speed for which the traveling speed of the own vehicle is preset by the vehicle speed detecting means. When it is detected that it is above, since the restriction means for restricting the operation of the pretensioner is provided, since the host vehicle is in a traveling state at a predetermined speed, depending on the operation of the steering wheel by the driver, etc. Although the rear collision can be avoided, when the rear collision prediction signal is output from the rear collision prediction means, the pretensioner causes the seat belt to move to a large position. The advantage of effectively preventing the situation in which the driver's body is unnecessarily restrained by being wound up by the brakes and suppressing the driver from feeling uncomfortable or hindering the driving operation There is.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of a vehicle seat belt device according to the invention.

FIG. 2 is a block diagram showing a specific configuration of the vehicle seat belt device.

FIG. 3 is a cross-sectional view showing a specific configuration of a pretensioner.

FIG. 4 is a flowchart showing a control operation of the vehicle seat belt device.

FIG. 5 is a block diagram showing another specific configuration of the vehicle seat belt device.

FIG. 6 is a flowchart showing a control operation of the vehicle seat belt device.

FIG. 7 is a map of the winding torque with the vehicle speed and the steering angle of the host vehicle as parameters.

[Explanation of symbols]

5 seat belts 6 pretensioner 7 Post-collision predicting means 8 Prediction means 9 Control means 10 Vehicle speed detection means 15 Regulation means 16 Forward detection means 17 Turning detection means

Claims (11)

(57) [Claims] 1. A control means for controlling to operate a pretensioner for retracting a seat belt for a driver when a rear collision predicting means detects that a rear collision may occur in the vehicle. A vehicle seat belt device having a vehicle speed detecting means for detecting a traveling speed of the own vehicle, and the traveling speed of the own vehicle is detected by the vehicle speed detecting means to be equal to or higher than a preset reference vehicle speed. In this case, a vehicle seat belt device comprising: a restricting unit that restricts the operation of the pretensioner. 2. The vehicle seat belt device according to claim 1, wherein the restriction means restricts the operation of the pretensioner on condition that the host vehicle is in a forward traveling state. Seat belt device. 3. The vehicle seat belt device according to claim 1 or 2, wherein the restricting means detects that the traveling speed of the host vehicle is equal to or higher than a preset reference vehicle speed by the vehicle speed detecting means. A seat belt device for a vehicle, wherein a seat belt retracting force by a pretensioner is reduced. 4. The vehicle seat belt device according to claim 1 or 2, wherein the restricting means detects the traveling speed of the host vehicle is equal to or higher than a preset reference vehicle speed by the vehicle speed detecting means. A vehicle seatbelt device, which prohibits the operation of the pretensioner. 5. The vehicle seat belt device according to claim 1 or 2, wherein the control means determines whether or not to operate the pretensioner based on the rear collision occurrence probability detected by the collision prediction means. When the vehicle speed detection means detects that the traveling speed of the host vehicle is equal to or higher than a preset reference vehicle speed, the regulation means is a rear collision occurrence probability that serves as a criterion for activating the pretensioner. A vehicle seat belt device characterized by increasing and correcting the reference value of. 6. The vehicle seat belt device according to any one of claims 1 to 4, wherein the restricting means restricts the operation of the pretensioner as the traveling speed of the host vehicle detected by the vehicle speed detecting means increases. A vehicle seat belt device, characterized in that it is configured to have a higher degree. 7. The vehicle seat belt device according to any one of claims 1 to 6, wherein a front collision prediction signal is output which detects that a front collision may occur in the host vehicle and outputs a front collision prediction signal. And a means for operating the pretensioner by the control means without restricting the operation of the pretensioner by the restriction means when the front collision prediction signal is output from the front collision prediction means. Characteristic vehicle seatbelt device. 8. A control means for controlling to operate a pretensioner for retracting a seat belt for a driver when a rear collision predicting means detects that a rear collision may occur in the vehicle. A vehicle seat belt device comprising: a turning detection means for detecting a turning state of the host vehicle; and when it is confirmed that the vehicle is in a turning state according to a detection signal of the turning detection means, A vehicle seat belt device, comprising: a restricting unit that restricts the operation of the pretensioner. 9. The vehicle seat belt device according to claim 8, wherein the restricting means sets the seat belt retracting force by the pretensioner in accordance with the turning state detected by the turning detection means. A vehicle seat belt device characterized by: 10. A control means for controlling to operate a pretensioner for retracting a seat belt for a driver when the rear collision predicting means detects that a rear collision may occur in the vehicle. A vehicle seat belt device comprising: a vehicle speed detecting means for detecting a traveling speed of the own vehicle; a turning detecting means for detecting a turning state of the own vehicle;
A seat belt device for a vehicle, comprising: a restricting unit that restricts a seat belt retracting force by the pretensioner according to detection signals of the vehicle speed detecting unit and the turning detecting unit. 11. The vehicle seat belt device according to claim 1, wherein a direction in which a driver's operation of a driving operation means is restricted when the pretensioner is operated to maintain a current operation state. A vehicle seatbelt device comprising: an operation control unit for controlling the vehicle seatbelt.