JP2000247211A - Seat belt device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively protect a driver when necessary without physical disorder when the possibility of the rear end collision on a self-vehicle is detected by a rear end collision predicting means. SOLUTION: A seat belt device for vehicle comprising a control means 9 for controlling a pretensioner 6 to be operated for taking-up a seat belt when the possibility of the rear end collision on the self-vehicle is detected by a rear end collision predicting means 7, further comprises a speed detecting means 10 for detecting a speed of the self-vehicle, and a restricting means 15 for restricting the operation of the pretensioner 6 when it is detected that the speed of the self-vehicle is not less than a predetermined reference speed by the speed detecting means 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention activates a pretensioner for winding a driver's seat belt when a rear collision predicting means detects that a rear collision may occur in the vehicle. The present invention relates to a vehicle seatbelt device provided with a control means for performing such control.

[0002]

2. Description of the Related Art Conventionally, as shown in, for example, JP-A-6-286581, a seat belt that can be worn by an occupant seated on a seat, and the above-mentioned seat belt wound up from an initial position by inputting an operation signal, have been described. A first pretensioner mechanism for generating a tension of 1 and restraining the occupant in a range where an operation for avoiding a vehicle collision is possible, and winding up the seatbelt in the first tension state by inputting an operation signal. A second pretensioner mechanism for generating a tension of 2 and restraining an occupant against a vehicle collision; and a first command for predicting the collision of the vehicle and outputting an operation command signal to the first pretensioner mechanism. 2. Description of the Related Art There is known a vehicle seatbelt device including means and a second commanding means for judging a collision of a vehicle and outputting an operation command signal to the second pretensioner mechanism.

[0003]

When the first pretensioner is operated 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 may not be connected to each other. By minimizing the distance, there is an advantage that the occupant can be protected, but on the other hand, when the vehicle is running, a rear collision may occur due to an obstacle behind the vehicle. Is determined,
There is a problem that the first pretensioner is activated and the occupant's body is unnecessarily restrained and the occupant is likely to feel uncomfortable.

[0004] 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. If the seat belt for the driver is wound up by operating the pretensioner in response to a detection signal of an obstacle sensor that detects an obstacle located behind 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 the occupant often occurs when the vehicle stops.

[0005] In view of such circumstances, the present invention provides a driver without giving a sense of incongruity to a driver when, for example, the rear collision predicting means detects that a rear collision may occur in the host vehicle. An object of the present invention is to provide a vehicle seatbelt device that can effectively protect a driver at times.

[0006]

The invention according to claim 1 is
When the rear collision prediction unit detects that a rear collision is likely to occur in the host vehicle, the vehicle includes a control unit that controls a pretensioner that winds a seat belt for a driver to operate. A seat belt device,
Vehicle speed detecting means for detecting the running speed of the host vehicle; and regulation for restricting the operation of the pretensioner when the running speed of the host vehicle is detected to be equal to or higher than a preset reference vehicle speed. Means.

According to the above arrangement, 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 set in advance in accordance with the detection signal of the vehicle speed detecting means. It is determined whether or not the vehicle speed is equal to or higher than the set reference vehicle speed. When it is confirmed that the vehicle is in a running state higher than the reference vehicle speed, the operation of the pretensioner is restricted by the restricting means, so that the vehicle is provided in the driver's seat. Thus, the winding of the seat belt is suppressed.

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

According to the above configuration, when the rear collision predicting unit detects that there is a possibility that a rear collision may occur in the own vehicle during the forward traveling of the vehicle, the rear collision prediction unit responds to the detection signal of the vehicle speed detecting unit. It is determined whether or not the traveling speed of the host vehicle is equal to or higher than a predetermined reference vehicle speed. When it is confirmed that the driving 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 restricting means. As a result, unnecessary restraint of the driver's posture by the seat belt is suppressed.

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 is configured such that a traveling speed of the own vehicle is equal to or higher than a reference vehicle speed set by a vehicle speed detecting means. Is detected,
This is to reduce the seat belt winding force by the pretensioner.

According to the above arrangement, when the rear collision predicting means detects that there is a possibility that a rear collision will occur in the own vehicle, the traveling speed of the own vehicle is changed according to the detection signal of the vehicle speed detecting means. It is determined whether or not the vehicle speed is equal to or higher than a predetermined reference vehicle speed, and if it is confirmed that the vehicle is in a running state higher than the reference vehicle speed, the winding force of the pretensioner is reduced by the regulating means. The seat belt will be wound up with less force than at the time.

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 is configured such that a traveling speed of the own vehicle is equal to or higher than a reference vehicle speed set by a vehicle speed detecting means. Is detected,
The operation of the pretensioner is prohibited.

According to the above construction, when the rear collision predicting means detects that there is a possibility that a rear collision will occur in the own vehicle, the traveling speed of the own vehicle is changed according to the detection signal of the vehicle speed detecting means. It is determined whether or not the vehicle speed is equal to or higher than a predetermined reference vehicle speed, and when it is confirmed that the vehicle is in a running state higher than the reference vehicle speed, the winding of the pretensioner is prohibited by the restricting means. Is prevented from being 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 a rear collision occurrence probability detected by the collision prediction means. The restriction means determines whether to activate the pretensioner when the vehicle speed detection means detects that the traveling speed of the own vehicle is equal to or higher than a predetermined reference vehicle speed. The reference value of the rear collision occurrence probability serving as a reference is increased and corrected.

According to the above configuration, it is determined whether or not the traveling speed of the own vehicle is equal to or higher than a predetermined reference vehicle speed in accordance with the detection signal of the vehicle speed detecting means. Is confirmed, the regulation value increases and corrects the reference value of the rear collision occurrence probability. Until the rear collision occurrence probability detected by the rear collision prediction means exceeds the reference value corrected for increase, the operation of the pretensioner is restricted, and the winding of the seat belt is suppressed.

[0016] The invention according to claim 6 is the above-mentioned claims 1-4.
In the vehicle seat belt device according to any one of the above, the restricting means is configured to increase the degree of operation restriction of the pretensioner as the traveling speed of the own vehicle detected by the vehicle speed detecting means increases. It is.

According to the above configuration, when the rear collision predicting means detects that there is a possibility that a rear collision may occur in the own vehicle, the traveling speed of the own vehicle is set in advance according to the detection signal of the vehicle speed detecting means. It is determined whether or not the speed is equal to or higher than the set reference vehicle speed, and when it is confirmed that the vehicle is in a running state higher than the reference vehicle speed, the operation of the pretensioner corresponding to the running speed of the host vehicle is restricted, and When the traveling speed is high, the winding force of the seat belt is significantly reduced as compared with the case where the traveling speed is low.

According to a seventh aspect of the present invention, there is provided the above-described first to sixth aspects.
The vehicle seatbelt device according to any one of the preceding claims, further comprising a front collision prediction unit that detects that a front collision may occur in the vehicle and outputs a front collision prediction signal. When the front collision prediction signal is output, without restricting the operation of the pretensioner by the restricting means,
The pretensioner is operated by the control means.

According to the above construction, when the front collision predicting means detects that there is a possibility of a front collision occurring in the vehicle, the operation of the pretensioner is not restricted by the restricting means. When the front collision prediction signal is output from the front collision prediction unit, the pretensioner is activated, and the seat belt is wound with a predetermined winding force.

The invention according to claim 8 operates the pretensioner for winding the driver's seat belt when the rear collision predicting means detects that there is a possibility of rear collision of the host vehicle. Vehicle seat belt device provided with control means for controlling the vehicle in such a manner that the vehicle is in a turning state according to a detection signal of the turning detection means for detecting a turning state of the own vehicle. And a restricting means for restricting the operation of the pretensioner when the operation is performed.

According to the above configuration, when the rear collision predicting means detects that there is a possibility that a rear collision will occur in the own vehicle, the own vehicle turns into a predetermined turning state in accordance with the detection signal of the turning detecting means. When it is confirmed that the operation of the pretensioner is restricted by the restricting means, the winding of the seat belt provided in the driver's seat is suppressed.

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

According to the above arrangement, at the time when the rear collision predicting means detects that there is a possibility that a rear collision may occur in the own vehicle, the rear collision detecting means detects the turning state of the own vehicle according to the turning state of the own vehicle. The operation state of the pretensioner is controlled such that the seat belt is wound up by the winding force set by the regulating means.

According to a tenth aspect of the present invention, the pretensioner for winding the driver's seat belt is activated when the rear collision predicting means detects that a rear collision may occur in the vehicle. Speed control means for detecting the running speed of the host vehicle, turning detection means for detecting the turning state of the host vehicle, the vehicle speed detecting means, and turning Regulating means for regulating the force of winding the seat belt by the pretensioner according to the detection signal of the detecting means.

According to the above configuration, at the time when the rear collision predicting means detects that there is a possibility of a rear collision occurring in the own vehicle, the traveling speed and the turning detecting means of the own vehicle detected by the vehicle speed detecting means are detected. The control for restricting the winding force of the seat belt in accordance with the turning state of the vehicle detected by the control means is executed by the restricting means, whereby the winding of the seat belt provided in the driver's seat is suppressed. become.

[0026] The invention according to claim 11 is the above-mentioned claim 1-
10. The vehicle seatbelt device according to any one of claims 10 to 10, further comprising an operation control means for restricting a driver's operation of the driving operation means and controlling in a direction to maintain a current operation state when the pretensioner is operated. Things.

According to the above construction, when the rear collision predicting means detects that a rear collision is likely to occur in the own vehicle, the pretensioner is activated and the seat belt is wound up. In this case, the operation of the driving operation means by the driver is restricted by the operation control means, thereby preventing a sudden change in the operation state of the driving operation means.

[0028]

1 and 2 show an embodiment of a vehicle seat belt device according to the present invention. The vehicle seatbelt device includes a driver's seat 4 having a seat cushion 1, a seatback 2 and a headrest 3, a seatbelt 5 for restraining a driver's body sitting on the seat 4, and a seatbelt 5 for the driver. And a pretensioner 6 that drives the seat belt 5 in a direction to hold the driver by winding the vehicle, and detects an obstacle behind the host vehicle to detect a possibility that a rear collision may occur in the host vehicle. Rear collision prediction means 7, front collision prediction means 8 for detecting an obstacle in front of the vehicle and detecting that a front collision may occur in the vehicle, and output from rear collision prediction means 7. The vehicle includes a control unit 9 for controlling the pretensioner 6 to operate in response to a rear collision prediction signal, and a vehicle speed detection unit 10 for detecting a traveling speed of the own vehicle.

As shown in FIG. 3, the pretensioner 6 includes 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, and It has a rack gear 13 for driving the pinion gear 12 to rotate, and a gas generator 14 for driving the rack gear 13. The gas generator 14 according to a control signal output from the control means 9 at the time of predicting a rear collision of the vehicle. 1
4 is configured to operate. This generates a gas pressure that moves the rack gear 13 from the lower standby position to the upper drive position, and
Is rotated to take up the seat belt 5 by the take-up reel 11, whereby a predetermined tension is applied to the seat bell 5.

The gas generating means 14 of the pretensioner 6 is configured so that the winding force of the seat belt 5 can be adjusted by, for example, being divided into two parts, and a part of the gas generating means 14 operates. Thus, the seat belt 5 is wound up with a small torque, and the entire gas generating means 14 is operated to wind up the seat belt 5 with a large torque. The rack gear 1
In place of the gas generator 14 and the gas generator 14, the take-up reel 11 is rotated by an electric motor to wind up the seat belt 5, thereby applying a predetermined tension to the seat belt 5 and reducing the driving torque of the electric motor. The winding force may be adjusted by controlling or the like.

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

The front collision prediction means 8 includes an ultrasonic sensor,
It detects whether there is an obstacle that causes a front collision in front of the host vehicle according to a detection signal from an infrared sensor or radar, etc., and if it is confirmed that this obstacle exists, The distance and relative speed between the object and the object are measured, and it is determined that there is a high possibility of a collision, and a front collision prediction signal is transmitted to the regulating means 15 for regulating 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 in front of the host vehicle when it stops, or when it approaches a fixed object or a moving object such as another vehicle in front of the host vehicle when the host vehicle advances. When it is detected that the vehicle is approaching, the front collision prediction signal is output to the restricting means 15.

The control means 9 includes the rear collision prediction means 7
When the rear-end collision prediction signal is output from, a command signal for operating the pretensioner 6 is output, and the seat belt 5 is wound up. Further, the control means 9 controls the pretensioner 6 to set the seat belt winding torque by the pretensioner 6 to a small value when the control signal is output from the control means 15.
It is configured to control the operation state of.

The restricting means 15 determines that the vehicle is in the forward state according to a detection signal of the forward detecting means 16 for detecting that the vehicle is in the forward state according to the operating position of the shift lever. In addition, it is determined whether or not the traveling speed of the own vehicle is higher than a predetermined reference vehicle speed in accordance with the detection signal of the vehicle speed detecting means 10, and the traveling speed of the own vehicle is higher than the reference vehicle speed. When it is confirmed that the vehicle is not in the vehicle stop state or the reverse state, the control signal is outputted to the control means 9 to restrict the operation of the pretensioner 6.

The restricting means 15 confirms from the detection signal of the vehicle speed detecting means 10 that the running speed of the own vehicle is equal to or higher than a preset reference vehicle speed, that is, that the own vehicle is in a forward state at a predetermined speed. Even in this case, when the front collision prediction signal is output from the front collision prediction means 8, the output of the regulation signal is stopped. Thus, at the time of the front collision prediction, the control means 9 executes the operation control of the pretensioner 6 for increasing the seat belt winding torque to a large value.

Control means 9 for the above-mentioned vehicle seat belt device
Will be described with reference to the flowchart shown in FIG. When the control operation is started, it is first determined whether or not a rear collision prediction signal has been output from the rear collision prediction unit 7 (step S1). When YES is determined, control for activating an alarm unit (not shown) is performed. By outputting a signal to activate the alarm means, the driver is notified that there is a possibility of a rear collision (step S).
2).

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

On the other hand, if the result of the determination in step S3 is YES and it is confirmed that the own vehicle is in a forward state, the running speed V of the own vehicle is set in advance in accordance with the detection signal of the vehicle speed detecting means 10. It is determined whether the speed is equal to or higher than the reference vehicle speed R (step S5). In this step S5, N
When it is determined as O and it is confirmed that the own vehicle is in the stopped state or the extremely low-speed running state, the process proceeds to step S4, and the pretensioner 6 executes control to wind the seat belt 5 with a large torque. .

If it is determined YES in step S5 and it is confirmed that the vehicle is in the forward traveling state at a predetermined speed, it is determined whether the front collision prediction means 8 has output a front collision prediction signal. Then, if it is determined to be YES (step S6), the process proceeds to step S4, and the pretensioner 6 executes control to wind the seat belt 5 with a large torque.

If NO is determined 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 on the host vehicle according to a detection signal of a collision detection unit (not shown). It is determined whether or not the operation has been performed (step S8). If the determination is YES, the process proceeds to step S4, and the pretensioner 6 executes control to wind the seat belt 5 with a large torque.

If NO is determined in step S8 and it is confirmed that no rear collision or front collision has occurred in the host vehicle, the process does not proceed to step S4.
Return 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 seat belt 5 is enlarged by the pretensioner 6 when the rear collision prediction signal is output from the rear collision prediction means 7. If it is confirmed that the vehicle is in the forward state at a predetermined speed while being wound up by the torque, the pretensioner 6
Is regulated, and the winding torque of the seat belt 5 is set to a small value.

Control means for controlling the pretensioner 6 for winding the seat belt 5 to operate when the rear collision predicting means 7 detects that a rear collision is likely to occur in the vehicle. 9, a vehicle speed detecting means 10 for detecting the running speed of the own vehicle, and the vehicle speed detecting means 10 detecting that the running speed of the own vehicle is equal to or higher than a preset reference vehicle speed. In this case, since the regulating means 15 for regulating the operation of the pretensioner 6 is provided, even when the rear collision predicting means 7 detects that a rear collision may occur in the own vehicle, When it is confirmed that the traveling speed of the own vehicle is equal to or higher than the reference vehicle speed according to the detection signal of the vehicle speed detecting means 10, the regulating means 15 controls the pretensioner 6 By operation is regulated, the seat belt 5 is prevented from being wound on a large torque.

Therefore, despite the fact that the host vehicle is in a running state at a predetermined speed, the rear collision can be avoided in accordance with the driver's operation of the steering wheel or the like.
At the time when the rear collision prediction signal is output from the rear collision prediction means 7, the occurrence of a situation in which the pretensioner 6 winds the seat belt 5 with a large torque and the driver's body is unnecessarily restrained is produced. It is possible to prevent the driver from feeling uncomfortable or hindering the driving operation.

When it is confirmed that the running speed of the own 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 in an extremely low speed running state close to the stopped state. Therefore, if it is confirmed that there is a high possibility that a rear collision cannot be avoided in accordance with the operation of the steering wheel by the driver or the like, the restricting means 1
5, the seat belt 5 is wound up with a large torque without restricting the operation of the pretensioner 6, so that the occupant can be effectively protected from a shock at the time of a rear collision.

In particular, in the above embodiment, the operation of the pretensioner 6 is restricted by the restricting means 15 as a condition that the vehicle is in a forward traveling state where the degree of attention to the rear side of the vehicle is low. When the vehicle is moving backward at a speed, when the rear-end collision prediction signal is output from the rear-end collision prediction means 7, the driver's driving posture is unexpectedly restrained by the seat belt 5 to prevent the driver from feeling uncomfortable. It can be effectively prevented.

Instead of the above embodiment, when the vehicle speed detecting means detects that the traveling speed of the own vehicle is higher than a preset reference vehicle speed, the regulating means 15 controls the seat belt 5 by the pretensioner 6. Can be configured to prohibit winding of the seat belt 5 as described in the above embodiment.
When the rear collision predicting means 7 confirms that the rear collision of the vehicle will occur, the driver's body is unnecessarily restrained. By winding the seat belt 5 with an appropriate torque while preventing the above, the driver can be effectively protected.

Further, in the vehicle seat belt device provided with control means 9 for determining whether or not to activate the pretensioner 6 based on the rear collision occurrence probability detected by the collision prediction means 7, the vehicle speed detection means When it is detected by 10 that the traveling speed of the own vehicle is equal to or higher than a preset reference vehicle speed, the control means 15 determines the rear collision occurrence probability as a criterion for determining whether or not to operate the pretensioner 6. The operation of the pretensioner 6 may be regulated by increasing and correcting the reference value.

In the above configuration, when it is confirmed that the running speed of the own vehicle is equal to or higher than the reference value according to the detection signal of the vehicle speed detecting means 10, the rear collision predicting means 7 Until the detected rear-end collision 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 becomes 5 can be effectively prevented from being unnecessarily restricted. In addition, when the reference value of the rear collision occurrence probability is increased and corrected, the seat belt 5 is quickly operated in accordance with the correction.
It is desirable to increase the operation speed of the pretensioner 6.

It should be noted that, instead of the above embodiment, the higher the traveling speed of the own vehicle detected by the vehicle speed detecting means 10 is,
The degree of restriction of the operation of the pretensioner 6 by the restriction means 15 may be increased. In the case of such a configuration, when the rear collision predicting means 7 detects that a rear collision may occur in the own vehicle, the traveling speed of the own vehicle is determined in accordance with the detection signal of the vehicle speed detecting means 10. It is determined whether or not the vehicle speed is equal to or higher than a preset reference vehicle speed, and when it is confirmed that the vehicle is in a running state equal to or higher than the reference vehicle speed,
The regulation of the operation of the pretensioner corresponding to the running speed of the host vehicle is executed. When the running speed is high, the winding force of the seat belt 5 is greatly reduced as compared with the case where the running speed is low. Is large, there is an advantage that the driver can be effectively prevented from being restrained by the seat bell 5 with a large force and feeling uncomfortable.

Further, in the above-described embodiment, there is provided front collision prediction means 8 for detecting that there is a possibility of front collision of the host vehicle and outputting a front collision prediction signal. When the collision prediction signal is output, the pretensioner 6 is operated by the control means 9 without restricting the operation of the pretensioner 6 by the restricting means 15, so that the own vehicle can travel at a predetermined speed. When the front collision predicting means 8 confirms that a front collision is likely to occur, the pretensioner 6 is operated with a normal driving force to wind up the seat belt 5. Accordingly, the driver can be effectively protected from the impact at the time of a front collision.

As shown in FIG. 5, a turning detecting means 17 comprising a lateral G sensor or a steering angle sensor for detecting the turning state of the host vehicle is provided. When it is confirmed that the vehicle is in the turning state, the operation of the pretensioner 6 may be restricted by the restricting means 15. In such a configuration, when the rear collision prediction means 7 detects that a rear collision is likely to occur in the own vehicle, the own vehicle is determined in accordance with a detection signal of the turning detection means 17. When it is confirmed that the vehicle is in the turning state, the operation of the pretensioner 6 is restricted by the restricting means 15, whereby the winding of the seat belt 5 provided in the driver's seat is suppressed.

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

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

If YES is determined in the step S15 and it is confirmed that the lateral G is in a sharp turning state equal to or more than the second reference value A1, the winding torque of the seat belt 5 is set to a small torque. Thus, a control signal for operating the pretensioner 6 is output (step S17). As a result, when it is confirmed that the own vehicle is in a gentle turning state or a straight traveling state, at the time when the rear collision prediction signal is output from the rear collision prediction means 7, the seat belt 5 is moved by the pretensioner 6. When it is confirmed that the vehicle is in a predetermined turning state while being wound with a large torque, the operation of the pretensioner 6 is regulated, and the winding force of the seat belt 5 is reduced to a medium torque or a small torque. Will be set.

As described above, when it is confirmed that the vehicle is in a turning state according to the detection signal of the turning detecting means 17,
In a case where the operation of the pretensioner 6 is restricted by the restricting means 15, the own vehicle is in a predetermined turning state, and the rear collision is being avoided in accordance with the operation of the steering wheel by the driver or the like. Nevertheless, when the rear collision prediction signal is output from the rear collision prediction means 7, the pretensioner 6 winds 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 winding 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. In the case of the configuration, when turning the own vehicle, while effectively preventing the driver from feeling uncomfortable or hindering the driving operation,
There is an advantage that the seat belt 5 can be wound up with an appropriate torque to appropriately protect the driver.

When the rear collision predicting means 7 detects that a rear collision is likely to occur in the host vehicle, the pre-tensioner 6 for winding the driver's seat belt is controlled to operate. As shown in FIG. 7, for example, as shown in FIG. 7, in a vehicle seatbelt device provided with a control means 9 for performing a turning operation, On the basis of a map in which the vehicle speed and the steering angle of the own vehicle are set as parameters, the winding force of the seat belt 5 by the pretensioner 6 is detected by the regulating unit 15 by the vehicle speed detecting unit 10 and the turning detecting unit 17. You may comprise so that it may be set according to a 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 operation of the pretensioner 6 is significantly restricted by the restricting means 15. For example, during high-speed running, the winding torque is set to 1, which is the minimum value, and when the vehicle is stopped, the winding torque is set to 10, which is the maximum value. The map also shows that the larger the steering angle of the host vehicle, the smaller the winding torque of the seat belt 5 is set so that the operation of the pretensioner 6 is more markedly restricted by the restricting means 15. I have.

According to the above configuration, when the rear collision predicting means 7 detects that a rear collision is likely to occur in the own vehicle, the traveling speed and turning of the own vehicle detected by the vehicle speed detecting means 10 are detected. 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 in accordance with the turning state of the vehicle detected by the detecting means 17, When the vehicle turns, the pretensioner 6 winds the seat belt 5 with an appropriate torque while appropriately preventing the driver from feeling uncomfortable or hindering the driving operation. Can be protected.

When the pretensioner 6 is operated, the operation of the driving operation means operated by the driver, for example, the driving operation means including a steering wheel, a brake pedal or an accelerator pedal, is restricted, and the current operation state is maintained. May be provided with operation control means for controlling the operation. In such a configuration, when the rear collision predicting means 7 detects that a rear collision is likely to occur in the host vehicle, the pretensioner 6 is activated and the seat belt 5 is wound. When the operation is performed, the operation of the driving operation unit by the driver is restricted by the operation control unit, so that it is possible to effectively prevent the operation state of the driving operation unit from suddenly changing.

[0061]

As described above, according to the present invention, when the rear collision prediction means detects that a rear collision is likely to occur in the host vehicle, the pre-winding belt for winding the driver's seat belt is used. In a vehicle seatbelt device provided with control means for controlling the tensioner to operate, a vehicle speed detecting means for detecting a running speed of the own vehicle, and a reference vehicle speed which is set in advance by the vehicle speed detecting means. When it is detected that the above is detected, a regulating means for regulating the operation of the pretensioner is provided, so that the own vehicle is in a running state at a predetermined speed. Although the rear collision prediction signal is output from the rear collision prediction means in spite of the state in which a rear collision can be avoided, the pretensioner causes the seat belt to This effectively prevents the situation in which the driver's body is unnecessarily restrained by being wound up by a shock, and can suppress the driver from feeling uncomfortable or hindering the driving operation. There is.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an embodiment of a vehicle seatbelt device according to the present 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 a winding torque using a vehicle speed and a steering angle of the host vehicle as parameters.

[Explanation of symbols]

 Reference Signs List 5 seat belt 6 pretensioner 7 rear collision predicting means 8 front collision predicting means 9 control means 10 vehicle speed detecting means 15 regulating means 16 forward detecting means 17 turning detecting means

Claims (11)

[Claims] 1. A control means for controlling a pretensioner for winding a seat belt for a driver to be activated when a rear collision predicting means detects that a rear collision may occur in the host vehicle. A vehicle speed detecting means for detecting a running speed of the own vehicle, and the running speed of the own vehicle is detected to be equal to or higher than a preset reference vehicle speed by the vehicle speed detecting means. And a regulating means for regulating the operation of the pretensioner. 2. The vehicle seat belt device according to claim 1, wherein the restricting means controls the operation of the pretensioner on condition that the host vehicle is in a forward running state. Seat belt device. 3. The vehicle seatbelt device according to claim 1, wherein the restricting means detects that the traveling speed of the own 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 the seat belt winding force of the pre-tensioner is reduced. 4. The vehicle seat belt device according to claim 1, wherein the restricting unit detects that the traveling speed of the own vehicle is equal to or higher than a preset reference vehicle speed by the vehicle speed detecting unit. A vehicle seat belt device for prohibiting the operation of the pretensioner. 5. The vehicle seat belt device according to claim 1, wherein the control means determines whether to activate the pretensioner based on a rear collision occurrence probability detected by the collision prediction means. When the vehicle speed detection unit detects that the traveling speed of the own vehicle is equal to or higher than a predetermined reference vehicle speed, the restriction unit determines whether or not to operate the pretensioner. A vehicle seat belt device for increasing and correcting the reference value. 6. The vehicle seat belt device according to claim 1, wherein the restricting means restricts the operation of the pretensioner as the traveling speed of the vehicle detected by the vehicle speed detecting means increases. A vehicle seat belt device configured to increase the degree. 7. The vehicle seat belt device according to claim 1, wherein a front collision detection signal is output by detecting that a front collision is likely to occur in the own vehicle. Means for controlling the pretensioner by the control means without restricting the operation of the pretensioner by the restricting means when a front collision prediction signal is output from the front collision prediction means. A seat belt device for a vehicle, characterized by: 8. A control means for controlling to activate a pretensioner for winding a driver's seat belt when the rear collision prediction means detects that a rear collision may occur in the own vehicle. A vehicle seatbelt device comprising: a turning detecting means for detecting a turning state of the own vehicle; and when it is confirmed that the vehicle is in a turning state according to a detection signal of the turning detecting means, A seat belt device for a vehicle, comprising: a regulating unit that regulates operation of the pretensioner. 9. The vehicle seat belt device according to claim 8, wherein the restricting means sets a winding force of the seat belt by the pretensioner according to a turning state detected by the turning detecting means. A seat belt device for a vehicle, comprising: 10. A control means for controlling a pretensioner for winding a driver's seat belt to operate when a rear collision prediction 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 regulating unit that regulates a winding force of the seat belt by the pretensioner according to detection signals of the vehicle speed detecting unit and the turning detecting unit. 11. The vehicle seatbelt device according to claim 1, wherein when the pretensioner is operated, a driver's operation of driving operation means is restricted to maintain a current operation state. A seat belt device for a vehicle, comprising an operation control means for controlling the vehicle.