JPH10329646A - Safety device of seat belt device with pretensioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the release of a safety device from being forgotten after mounted on a car body in a seat belt device with pretensioner in which the safety device is laid in operating state so that a pretensioner is not faultily operated until the mounting on the car body is ended. SOLUTION: This seat belt device comprises a belt winding device 1 having a belt tensioner and a belt 2 to be drawn from the belt winding device 1. The safety lever 6 of a safety device for preventing the faulty explosion of a pretensioner has a belt constraining part 62 for pressing the belt 2 to the peripheral part of the belt leading port 1a of the belt winding device 1 to constrain the belt 2 so as not to be drawable. Thus, the safety lever 6 is rotated and laid in the safety device releasing state after the belt winding device 1 is mounted on the body, whereby the belt 2 can be drawn from the belt winding device 1 and drawn around along a center pillar.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for a seat belt device with a pretensioner in a vehicle.

[0002]

2. Description of the Related Art A belt winding device (emergency lock retractor) having a function of detecting an impact generated at the time of a collision and locking the movement of the belt in a pull-out direction with a seat belt device of a vehicle, and the belt Conventionally, a pretensioner that rotates a winding device in a winding direction and forcibly tightens a belt is provided to enhance restraint of an occupant.

[0003] The pretensioner is usually mounted integrally with the belt winding device, and when a sensor detects a collision, explosives are exploded and the explosive gas activates an actuator to force the belt winding mechanism in the winding direction. The pre-tensioner is an electric actuation mechanism that operates by the electric signal of the sensor, and the mechanical actuation mechanism that mechanically operates by sensing the impact at the time of collision with the inertial body. It is roughly divided into pretensioners.

[0004] Among the above, the electric actuating mechanism has no danger of erroneous explosion unless the electric circuit is connected, but the pretensioner of the mechanical actuating mechanism has a vibration or the like during the transfer of parts or the mounting work. There is a risk of accidental explosion, and a safety device is conventionally provided to prevent such an accidental explosion.
Then, after the seat belt device having the pretensioner of the mechanical operating mechanism is attached to the vehicle body, the safety device is released.

However, there is a concern that the operator may forget to release the safety device only by instructing that the safety device must be released after the mounting. As a countermeasure, after attaching the belt take-up device with the pretensioner to the vehicle body, use a trim (interior material) attached to the vehicle body so as to cover them, and the safety device of the pretensioner must be released unless the safety device of the pretensioner is released. A type in which the lever interferes to hinder installation of the trim has been conventionally developed.
No. 3 has been published.

[0006]

As described above, if the safety device is not released, the lever of the safety device protrudes toward the interior of the vehicle cabin, and the end of the lever hits the trim (interior material) itself to hinder the installation of the trim. The related art has a problem that if the trim is erroneously pressed without releasing the safety device, the trim may be damaged at the tip of the lever and may not be used. Also, a plurality of abutting plates protruding in the form of ribs are integrally provided on the back surface of the trim so that unless the safety device is released, the lever interferes with the abutting plate and the mounting of the trim is hindered. In addition to the complicated trim forming, this not only increases the cost, but also causes the seat belt to interfere with the corresponding contact plate due to the protrusion of the plurality of contact plates, and may be damaged. There is a problem that it cannot be applied when there is not enough space.

An object of the present invention is to provide a configuration that solves the above-mentioned problems.

[0008]

According to the present invention, there is provided a belt winding device equipped with a pretensioner, a belt winding device which is pulled out from the belt winding device, is drawn upward, and is drawn downward through a belt turning member. A seat belt device with a pretensioner comprising a belt, wherein a safety device is provided for preventing erroneous explosion of the pretensioner, and a safety lever for switching between an operation state of the safety device and a release state of the safety device is provided. In the safety lever, the safety lever is provided with a belt restraining portion for restraining the belt from being pulled out from the belt winding device in an operating state of the safety device, and after attaching the belt winding device to the vehicle body, By rotating the safety lever to release the safety device, the restraint on the belt by the safety lever is released, and the belt is pulled out and pulled. To be able to perform the work, thereby releasing forgetting safety device after attaching the seat belt device to the vehicle body can be reliably prevented.

[0009]

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

In FIG. 1, reference numeral 1 denotes a belt winding device (emergency lock retractor) integrated with a pretensioner. As shown in FIG. 2, the belt winding device 1 is a lower part of a vehicle body such as a center pillar 4 or the like. The belt 2 pulled out upward from the belt outlet 1a of the belt winding device 1 passes downward through a belt folding member (belt through) 3 provided at a predetermined height position of the center pillar 4. It is pulled around and fixed to the lower part of the vehicle body such as a side sill at its lower end. Then, the belt 2 drawn upward
a, and an interior material such as a pillar trim 5 is attached to the inside of the vehicle body such as the center pillar 4 between the belt winding device 1 and the belt 2b drawn downward. The structure of the vehicle seatbelt device, which is configured to cover a part of the belt 2a thus formed, is more general than before.

The pretensioner integrated with the belt winding device 1 is of a mechanical operation mechanism and is not shown in the drawings. , A primer, a gas generator, and an actuator such as a cylinder mechanism. The G sensor moves at the collision acceleration, and the tip of the sensor strikes the primer. The gas generated by the explosion moves the piston of the actuator, and the movement forcibly rotates the belt winding drum of the belt winding device 1 in the belt winding direction.

[0012] The pretensioner is provided with a safety device. The safety device can be switched between an operating state of the safety device in which the movement of the G sensor is locked and a safety device releasing state (standby state) in which the movement of the G sensor is not locked by rotating the safety lever 6. Until the belt winding device 1 is attached to the vehicle body, the safety device is kept in an operating state so that the pretensioner does not explode during handling such as transporting and attaching work. ,
When the attachment of the belt winding device 1 to the vehicle body is completed, the safety lever 6 is turned by 90 ° to release the safety device, and then the pillar trim 5 is attached to the pillar 4.

When the safety device is in the operating state, the safety lever 6 of the safety device is adapted to pull the belt 2 pulled out from the belt outlet 1a of the belt winding device 1 as shown in FIGS. 1 (A) and 1 (B). The belt 2 is configured to be pressed against the peripheral edge of the belt outlet 1a and to function to restrain the belt 2 from being further pulled out.

That is, the safety lever 6 is connected to the belt outlet 1.
1A has an engaging portion 61 for engaging with the frame side edge portion, and as shown in FIGS. 1A and 1B, the engaging portion 61 is connected to the frame side edge portion of the belt outlet 1a. In a state in which the belt 2 is engaged (safety device operating state), the belt restraining portion 62 presses the belt 2 against the peripheral portion of the belt outlet 1a, and the belt 2
Is not held out of the belt winding device 1. Then, the engaging portion 61 is removed from the frame side edge of the belt outlet 1a, and as shown in FIG.
By rotating the safety lever 6 by 90 ° to release the safety device, the belt restraining portion 61 separates from the belt 2,
The belt 2 is configured to be able to be pulled out freely from the belt winding device 1.

Until the belt winding device 1 is attached to the vehicle body, the belt 2 is held in the wound state by the urging force of the belt winding direction of the belt winding device 1, and the belt winding device After the belt 1 is mounted on the vehicle body, the belt 2 is pulled out from the belt winding device 1 and pulled around as shown in FIG. 2. The belt winding device 1 has a lock mechanism for locking the movement in the belt pulling direction in an emergency. If the belt is once locked, the belt is returned slightly in the winding direction to release the lock, and then the belt is pulled out. Therefore, before attaching the belt winding device 1 to the vehicle body, the belt winding device If the belt 2 has been wound up to the full capacity of 1, the lock cannot be released if the movement in the belt withdrawal direction is locked. Therefore, conventionally, as shown in FIG. 3, a belt stopper 10 configured as a single dedicated component is inserted into the belt,
In general, the belt stopper 10 prevents the belt 2 from being overwound, so that the belt is not locked up due to overwinding.

According to the present invention, the belt restraining portion 62 of the safety lever 6 is
Is pressed against the peripheral portion of the belt pull-out opening 1a to hold the belt 2 so as not to be pulled out from the belt winding device 1, prevent the belt 2 from being excessively wound, and attach the belt winding device 1 to the vehicle body. After the attachment, the safety lever 6 is rotated to make the safety device released, whereby the belt 2 is pulled out from the belt outlet 1a, and the belt 2 is drawn around the center pillar 4 as shown in FIG. Can be performed.

As described above, after the belt winding device 1 is attached to the vehicle body, the belt 2 cannot be pulled out and turned around unless the safety lever 6 is rotated to release the safety device. Thus, it is possible to reliably prevent forgetting to release the safety device after the seat belt device is attached.

[0018]

As described above, according to the present invention, in a seat belt device with a pretensioner including a belt winding device provided with a pretensioner and a belt pulled out from the belt winding device, the safety of the pretensioner is improved. A safety lever for switching the device between the safety device operating state and the safety device releasing state is provided with a function of restraining the belt from being pulled out from the belt winding device in the safety device operating state. After attaching the device to the vehicle body, the belt must not be pulled out from the belt winding device and pulled along the vehicle body (pillar) unless the safety lever is rotated to release the safety device. As a result, it has been confirmed that the safety device must not be released after the seat belt device with pretensioner has been attached to the vehicle body pillar. In which it is possible to prevent the.

Further, the safety lever has a function as a belt stopper for preventing the belt from being excessively wound on the belt winding device in the safety device operating position. This eliminates the need for a belt stopper used as a dedicated part, and can reduce the number of parts, and can have a great effect in practical use, coupled with a simple structure and low cost. .

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, in which (A) is a perspective view showing an example of a belt winding device, and shows a safety device operating state. (B) is an enlarged view of the belt outlet around the (A), and (C) is a perspective view of the belt outlet around the safety device released state.

FIG. 2 is a perspective view showing an example of a state in which a seat belt device is attached to a vehicle body.

3A and 3B show a belt overwinding prevention means of a conventional belt winding device, wherein FIG. 3A is a perspective view of a belt stopper,
(B) is a perspective view showing a state in which a belt stopper is inserted into the belt to prevent overwinding of the belt.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Belt winding device 1a Belt outlet 2 Belt 2a Belt pulled up 2b Belt pulled down 3 Belt folding member 4 Center pillar 5 Pillar trim 6 Safety lever of safety device 61 Engagement unit 62 Belt restraint unit

Claims (2)

[Claims] 1. A seat belt device with a pre-tensioner, comprising: a belt winding device having a pre-tensioner; and a belt pulled out from the belt winding device.
A safety device for preventing accidental explosion of the pretensioner is provided, and a safety lever for switching between an operation state of the safety device and a release state of the safety device is provided. A safety device for a seat belt device with a pretensioner, comprising a belt restraining portion for restraining a belt from being pulled out from a belt winding device in an operating state. 2. The safety device for a seat belt device with a pretensioner according to claim 1, wherein an engagement portion is formed at a tip of a safety lever of the safety device, and the engagement portion is formed when the safety device is in an operating state. The belt engaging portion of the belt retractor engages the side of the belt with the frame, so that the belt restraining portion of the safety lever presses the belt against the peripheral portion of the belt withdrawing opening, thereby restraining the belt from being pulled out and preventing the belt from being pulled out. A safety device for a seat belt device with a pretensioner, wherein the safety device is configured to prevent winding.