JPS5810669Y2 - Passive belt emergency release device - Google Patents

Description

[Detailed description of the invention] This invention is a passive bell for releasing occupant restraint in a passive belt device in an emergency.) Emergency! .

This relates to a removal device.

It is well known that seat belts are widely used to ensure the safety of vehicle occupants.

Recently, in order to make it easier to attach and detach a belt, a passive belt device that automatically attaches and detaches a belt in response to the opening and closing of a door has been proposed, and efforts are being made to put it into practical use.

Passive belts usually have a belt that restrains five occupants, and a system that pulls out the belt and maintains it so that it can be retracted, or that responds to the opening and closing of a tractor and door by shifting the seat belt between a restraining position and a release position within the vehicle. The retractor is equipped with an emergency lock mechanism that prevents the belt from unwinding in the event of an emergency such as a vehicle collision.

However, since this passive belt is attached or detached regardless of the occupant's will, it is extremely difficult for the occupant to release the seatbelt in the event of an emergency. Making escape impossible.

For this reason, many studies have been conducted to release the restraints of passengers and ensure their freedom of movement in such emergencies.
JP-A-51-55525, JP-A-51-5552
Publication No. 6 has been proposed.

However, the means described in each of these publications are linked to the seatbelt tension to release the seatbelt restraint or detach the retractor from the vehicle body, and only when the vehicle is in a relatively flat state. It is easy to detect belt tension, but when the vehicle is tilted and the passenger's load is applying tension to the belt, it becomes difficult to release the pawl that is engaged with the ratchet wheel, and in reality, emergency release is not achieved. There is no denying that it is impossible to do so.

or. If the tractor is detached from the vehicle body, the tractor may hit the passenger's body, which is dangerous.

In view of this situation, the present invention was devised for the purpose of disengaging the pawl and the ratchet wheel directly in order to ensure emergency release under any circumstances.

Provided with a means for suddenly releasing the lock, and also provided with a means for fixing the disengaged position between the pawl and the ratchet wheel,
The feature is that unlocking is ensured.

The specific configuration of the present invention will be described below in detail based on the attached drawings. Figures 1 to 3 show an example of a shear tractor used in the passive belt device of the present invention and which form the main parts of the present invention. 1 shows the normal state, FIG. 2 shows the locked state in an emergency, and FIG. 3 shows the emergency unlocked state.

Although 1 is not shown in these figures, the U-shaped frame substrates 2 and 3 surrounding the belt wound around the take-up reel are each fixed coaxially with the take-up reel (not shown) and rotate together with the take-up reel 1. The moving first and second ratchet wheels 4 are engaged with the first ratchet wheel 2, and the lock pawl 5, which is separated from the first ratchet wheel 2, moves up and down in response to the displacement of a vehicle body displacement sensing member 8 such as a pendulum. It is a stopper for locking the locking part provided on the second ratchet wheel 3 and engaging the pawl 4 with the first ratchet wheel 2, and has a pressure receiving part 5b in part that receives pressure from the displacement of the vehicle body. The retractor is composed of a reverse retractor configured to move up and down by engagement with the pin 7 and the elongated hole 6, and each of these elements is the same as the configuration of each part of a conventionally known emergency locking retractor. .

Note that the retractor includes other members such as a coil spring, but these are not particularly relevant here and will therefore be omitted.

In the retractor as described above, reference numeral 12 is a manual lever for unlocking which is a feature of the present invention, and a mounting plate 16 is provided on the inner surface of one frame side plate of the U-shaped board 1.
One end is supported 17 on the other side of the frame, and a manual operation part is inserted into the horizontally elongated hole 11 provided in the upper part of the frame side plate on the other side to extend outward from the side plate.
It is configured to be movable by rotation around 7.

This manual lever 12 is integrally equipped with a release plate 13 which is supported by a support shaft 14 on the inner surface of a side plate having a long hole 11, is biased toward the normal position of the manual lever 12, and is brought into elastic contact with an elastic spring 15. Installed with 1 manual lever 1
2 to the unlocking side, that is, to the right in the figure, the lower end of the release plate 13 comes into contact with the teeth of the first ratchet wheel 2, and the first ratchet wheel 2 is rotated in the winding direction. to release the lock engagement.

On the other hand, at the end of the elongated hole 11, the stopper presser 9 that presses the upper end of the stopper 5 comes into elastic contact with the tension spring 10, and when the manual lever 12 moves to the far right in the figure, it resists the elasticity of the tension spring 10. Press the stopper foot to push the stopper 5 downward.

5, and a manual lever 12 is installed in the elongated hole 11 corresponding to the position where the stopper presser 9 is pressed.
A wide locking portion 11a for locking the stopper 50 is formed, and by positioning the manual lever 12, the stopper 50 locking portion 5
The second ratchet wheel 3 and the pawl 4 are reliably placed in the non-engaging position, respectively.

Further, although it is not essential in the device of the present invention, a switch 18 is arranged on the mounting plate 16 behind the manual lever 12, and when it is in contact with the manual lever 12 in the normal state, it is in the open state. Cuts off the current, but closes the circuit when the manual lever is released to release the emergency lock.
It communicates with an alarm device 19 through wiring 20 and is designed to issue an alarm.

The present invention is constructed as described above, and when the vehicle is in a normal state, the manual lever 1 is operated in the state shown in FIG.
2. is in contact with the switch 18, and the stopper 5 and pawl 4 are not engaged with the ratchet wheel 2°3, respectively.
Therefore, the belt B is in a free state with the drawer 1 winding and performs the prescribed passive belt operation, but when a change occurs in the vehicle body due to a collision or the like, the displacement detects the vehicle body displacement sensing member 8 as is known in the art. Due to the inclination of the stopper 5, the stopper 5 is raised and engaged with the second ratchet wheel 3, and then the pawl 4 is engaged with the first ratchet wheel 2, thereby establishing an emergency lock.

FIG. 2 shows such a state, in which the drawer of Bell) B is closed and the occupant is restrained and unable to escape from the vehicle.

Therefore. When the manual lever 12 is operated and moved along the horizontally elongated hole 11, the release plate 13, which is integrated with the manual lever 12, comes into contact with the first ratchet wheel 2 at the beginning of the movement. Rotate the wheel 2 in the belt winding direction, that is, clockwise in the figure, to release the engagement between the pawl 4 and the first ratchet wheel 2 as shown in FIG. 5a and the second ratchet wheel 3 are released.

In this way, the belt B can be freely pulled out again, allowing the restraining belt to become loose and allowing the patient to escape.

Then, in order to set the pawl and the ratchet wheel in a disengaged state, the manual lever 12 is locked in the locking enlarged portion at the end of the elongated hole 11.

FIG. 4 shows an example in which the above retractor is actually used in a passive belt device, in which the retractor R is attached to the center side of the vehicle body 21 of the seat 23.

A structure is shown in which the end of the pulled out belt B is fixed to a movable anchor 24 that moves along a guide rail 25 provided on the roof above the door 2.

This passive belt system is a diagonal belt and is equipped with a knee pad 26 in front of the seat 23.
The use of the retractor is in addition to the system shown in FIG.
Of course, it can be applied to various passive belt systems.

This makes it possible to make the function of the passive belt even more effective.

As described above, according to the device of the present invention, the emergency lock can be directly released by operating one manual lever, regardless of the condition of the vehicle, or even when the passenger's load is exerting tension on the belt. The lock can be surely released, the belt can be easily pulled out from the reel, the restraint-fitting belt can be greatly slackened, and an emergency escape can be attempted, which has an excellent effect of making the function of the passive belt device more effective.

[Brief explanation of the drawing]

1 to 3 are perspective views showing an example of a tractor that constitutes the essential parts of the device of the present invention, in which FIG. 1 shows the tractor in a normal state, FIG. 2 shows it in a locked state, and FIG. 3 shows it in an unlocked state. Moreover, FIG. 4 is a perspective overview view showing an example of a passive belt device. 1... U-shaped frame board, 2, 3...
・Ratchet wheel, 4... Paul, 5...
... Stopper 8 ... Vehicle body displacement sensing member,
9...stopper presser, 11...horizontal hole, 12...manual lever, 13...release plate, 18...switch, 19・・・・・・Alarm device.

Claims (1)

[Scope of utility model registration request] 1. A belt take-up reel, a ratchet wheel that rotates together with the take-up reel; a pawl that engages and separates from the ratchet wheel; in an emergency, the pawl engages with the ratchet wheel in response to the displacement of the vehicle body to unwind the belt; In a passive belt device that is equipped with an emergency locking mechanism to prevent this, or that includes a tractor and is configured to automatically load and unload the belt in response to the opening and closing of a door, the ratchet wheel is moved in the belt winding direction by a manual lever on the retractor. A passive belt emergency release device characterized by having a means for rotating to release the lock and a means for fixing a pawl and a ratchet wheel in a non-engaging position. 2. The passive belt emergency release device according to claim 1, wherein the manual lever is connected to an alarm device via a switch that is open when normal and closed when locked.