JPS5854278Y2 - Passive belt belt winding force adjustment device - Google Patents

Description

[Detailed description of the invention] The present invention is an improvement of the passive belt device.The passive belt is designed to be able to open and close the door with ease, and to ensure that the belt winding force of the winding device has the required strength when the occupant is restrained. The present invention relates to a belt winding force adjusting device.

In order to ensure the safety of vehicle occupants, many passive belt devices have recently been proposed and put into practical use that automatically retract the seat belt in response to the opening and closing of a door. The belt winding device usually uses a spiral spring that has one end fixed to a belt winding shaft and the other end fixed to a spring case, and uses its unwinding elasticity to rotate the winding shaft and wind the belt around the winding shaft. Since the spring case is fixed, when the belt is pulled out from the take-up device when the door is opened, the unwinding force of the belt gradually increases as the spring tightens. However, there is a problem in that the pull-out resistance of the belt increases and the force required to open the door increases, which is a problem in passive belt devices. Focusing on the problem, we weakened the belt winding force of the spiral spring of the winding device when the door was opened, in conjunction with the opening and closing of the door.
The purpose is to apply the necessary belt winding force to the spiral spring of the winding device when the door is closed, making it easier to open and close the door and restrain and release the occupant, thereby improving the function of the belt as a passive belt device. The spring case that houses the spiral spring is rotatable, and the spring case is rotated by the reciprocating movement of a drive member that is reciprocated by a response amplification mechanism that responds to the opening and closing of the door. do.

Hereinafter, specific details of the device of the present invention will be further explained based on embodiments shown in the accompanying drawings.

Fig. 1 shows an example of a passive belt device to which the device of the present invention is applied, and in the figure, 1 is a vehicle body, 2 is a door, 3 is a shoulder bell) 3a and a waist belt 3b connected thereto are formed in a continuous belt shape. It is a continuous belt, and one end of the continuous belt 3 on the shoulder belt side is urged toward the retracting side and stored around an emergency lock retractor 5 attached near the upper part of the center pillar 4 in the center of the vehicle body 1. The other end of the roof side 6 is inserted into a guide link 9' attached to a slider 9 that slides along a guide rail 8 extending behind the front pillar γ, and lowers diagonally over the seat 10, thereby lowering the seat. Buckle stalk 11 stuck on the center side of 100 vehicles
It is inserted through a tongue 12 that is removably attached to the belt, is folded back, becomes a waist belt 3b, crosses the seat 10 again, and runs along a guide rail 13 that is diagonally installed upward from the lower part of the open side inside the door 2. The emergency lock retractor 15VC is wound and housed in a guide ring 14' attached to a slider 14 which slides on the door 2, and is provided at the lower part of the open side of the door 2.

Note that both retractor 5 and retractor 15 normally wrap the belt around so that it can be pulled out freely so as not to impede the movement of the occupant, but in the event of a collision where sudden acceleration or deceleration occurs. The vehicle is equipped with a well-known emergency locking mechanism that automatically locks the belt and restrains the occupant when the vehicle tilts, using the inertia of the belt to pull out or the vehicle's body response.

In addition, when the door 2 is opened, the emergency locking mechanism becomes inactive and the emergency locking mechanism becomes inactive when the contact tool 16 provided on the vehicle body 1 side and the operating pin 17 provided on the door 2 side separate when the door 2 is opened. ) A configuration in which the 3b can be freely drawn out and rolled in is preferably and generally adopted.

Furthermore, in the figure, reference numeral 18 denotes a response amplification mechanism that is built into the inside of the hinge side of the door 2 and responds to the degree of opening of the door 2.
-63961 (see Utility Model Application Publication No. 54166614).

), which has a mechanism as described in the specification of
A drive wheel 20 consisting of two large and small drive gears 20 a and 20 b is rotated in conjunction with the opening degree of the door 2 through a series of mechanisms connected to a connecting rod 19 whose one end is attached to the vehicle body 1 side. It looks like this.

And these two large and small drive gears 20a 520bV
C is two driving members 21 each made of a flexible wire with rack teeth formed on the periphery, that is, a racked wire.
．． 22 are engaged with each other (and the drive member 2L22 is rotated by the guide rail 8 due to the rotation of the drive gears 20a and 20b).
Slider 9 slides inside ゜13 and is fixed in the middle part.
, 14 between the occupant restraint position and the release position (
・Ru.

Further, a portion of the driving members 21, 220 extending from the slider 9, 14 attachment portion includes a spiral spring 5b having one end fixed to the retractor 5, 150 heald winding shaft 5a, 15a, as shown in FIG. It is attached to the other end of 15b,
The spring cases 5c and 15c are rotatably provided, and are engaged with engagement teeth carved around the periphery of the spring cases 5c and 15c. 5c and 15c are rotated in both the predetermined forward and reverse directions, and the belt winding shafts 5a and 15a are accordingly rotated in the same direction as the spring case both in the forward and reverse directions, thereby exerting the required rewinding force on the belt. I have to.

Next, to explain the operation of the passive belt device constructed as described above, first, when the door 2 is closed, the slider 9 is located at the rear end side of the guide rail 8 and the retractor 5 is located at the rear end side of the guide rail 8. The spiral spring 5b is in a tightly wound state, while the slider 14 is located at the rear lower end side of the guide rail 13, and the spiral spring 15b of the retractor 15 is also in a tightly wound state.

Therefore, shoulder bell of continuous belt 3) 3a beam tractor 5V
Also, the contact belt 3b is caught in the IJ rafter 15 at the bottom of the open side of the door 2.

When the door 2 is opened in this state, the connecting rod 19 in the response amplification mechanism 18 is pulled in response to the opening of the door 2, and each member of the response amplification mechanism 18 is actuated.
Rotate counterclockwise.

Therefore, the racked wires 21 and 22 meshing with the large drive gear 20a and the small drive gear 20b of the drive wheel 20 are pulled and slid, and the slider 9 fixed at the intermediate portion thereof
, 14 move to the forward avoidance position along the guide rails 8, 13VC.

This allows the shoulder belt 3 to be inserted through the guide link 9'.
While being let out from the retractor 5, it is avoided along the guide rail 8 to the vicinity of the front pillar 7, and the belt 3b inserted through the guide ring 14' is being let out from the tractor 15 and guided from the lower part of the open side of the door 2. The first
As a result, the gap between the seat 10 and the continuous belt 3 widens, allowing the occupant to easily get on and off the vehicle without feeling any resistance.

At this time, as the driving members 21 and 220 slide forward, the spring cases 5c and 15c of the retractor 5 and the retractor 15 rotate in the unwinding direction of the internal spiral springs 5a and 15a, and together with this, each retractor -5,1
The winding force of the belt 5 is reduced, and the occupant can easily open the door 2.

Next, in the process of closing the door 2 from the open state after the passenger gets on the vehicle, the connecting rod 1 in the response amplification mechanism 18
9 is pushed toward the opening side of the door 2, acting force is transmitted to each member of the response amplification mechanism 18, causing the drive wheel 20 to rotate clockwise.

Therefore, the racked wire 21 meshed with the large drive gear 20aK of the drive wheel 20 and the racked wire 22 meshed with the small drive gear 20b are pushed out from the response amplification mechanism 18 and slide within the guide rails 8, 13, respectively. Sliders 9, 14 fixed to each racked wire 21, 22
is moved to the restraint position at the rear of the vehicle body 1.

As the sliders 9 and 14 move rearward, the shoulder bell) 3a inserted through the guide ring 9' gets caught up in the tractor 5, and at the same time, the manufactured bell) 3b inserted through the guide link 14' also gets caught up in the tractor 5. It is rolled up and stored in the retractor 15.

At this time, as the driving members 21 and 220 slide rearward, the spring cases 5c and 15c of the retractor 5 and the retractor 15 release the spiral spring 5a inside.

The retractors 5 and 150 rotate in the same direction as the tightening direction of the retractors 15a, so that the winding force of each retractor 5, 150 becomes a predetermined strength necessary to restrain the occupant, and the occupant tightens the shoulder belt 3).
The continuous belt 3 consisting of a belt (a) and a waist belt (3b) restrains the passenger in a good condition, ensuring safety while riding.

As described above, the present invention relates a drive member driven by a response amplification mechanism that operates in response to opening and closing of a door to a spring case rotatably mounted on a winding shaft of a belt winding device via a spiral spring. When the door is opened, the spring case is rotated in the direction in which the spiral spring winds back, and when the door is closed, the spring case is rotated in the direction in which the spiral spring is wound tightly. When the door is opened, the spring rotates in the same direction as the belt is pulled out, which alleviates the tendency of the spring to tighten, allowing the door to open extremely smoothly. The spring is rotated to assist the winding, and the effect of stable and reliable restraint is achieved by eliminating the delay in belt attachment and making the restraint state by Sihert no different from the conventional one.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of the device of the present invention, and FIG. 2 is a side view of a belt winding device used in the device. 2...Door, 3...Belt, 5,15
... Winding device, 5a, 15a... Winding shaft, 5b, 15b... Spiral spring, 5c
, 15c...Spring case, 9°14...
...Slider, 9', 14'...Guide ring, 18...Response amplification mechanism, 20...
... Drive wheel, 21°22... Drive member.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A response in which a driving member slides in response to the opening and closing of a door, and a belt is transferred between an occupant release position and a restraint position by a guide ring with a slider connected to the driving member. In a passive belt device equipped with an amplification mechanism, a spiral spring is attached to a belt winding shaft of a belt winding device by fixing one end thereof, and the other end is connected to a rotatable spring case. A belt winding force adjusting device for a passive belt, characterized in that the spring case is engaged with the driving member so that the spring case rotates in the belt pulling direction when the door is opened and in the belt winding direction when the door is closed. 2. The belt winding of the passive belt according to claim 1, wherein the driving member is a rugged wire, and on the other hand, engagement teeth are provided around the spring case so that the two mesh and engage with each other. Loading force adjustment device.