JPS5830179B2 - Drive device for safety belt guide mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive device for a belt guide mechanism that guides a safety belt between an occupant restraint position and a release position in response to opening and closing of a door.

Various belt guide mechanisms for passive belt devices that automatically attach and release the belt are known, such as guides provided on the inside surface of the roof side, the inside surface of the door, the outside door frame, the front pillar, the center pillar, etc. A rail, a slider or belt anchor that is guided along the guide rail and inserts or holds the belt, and rigging such as a rope, wire, or geared wire that drives the slider or belt anchor along the guide rail; It consists of a drive device etc. that drive this rigging.

Furthermore, this drive device can be of an electric type or a mechanical type, and this mechanical drive device is used by increasing the opening/closing stroke of the door. are categorized.

In the case of this mechanical drive, the belt moves from the occupant restraint position to the occupant release position when the door is only opened half way, to enable entry and exit even in places where the door is only slightly opened, such as in a narrow parking lot. It should be done as follows.

The belt guide mechanism should not operate from when the door is half open to when the door is fully opened.

Furthermore, the belt guide mechanism may become inoperable due to deformation of the vehicle body or the door due to an accident, so the door must be able to be opened even in such a case.

A first object of the present invention is to provide a mechanical drive device for a belt guide mechanism that can move a belt from an occupant restraint position to an occupant release position simply by opening the door halfway.

A second object of the present invention is to provide a mechanical drive device that allows the user to open the door and escape from the vehicle even when the belt guide mechanism becomes inoperable due to an accident or the like.

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an example of a safety belt device equipped with a drive device for a belt guide mechanism according to an embodiment of the present invention.

This safety belt device itself is well known, so to briefly explain, 1 is a shoulder belt extending obliquely above the seat 2, 3 is a shoulder belt disposed below the seat 2, and one end of the shoulder belt 1 is disposed below the seat 2. 4 is a buckle attached to the inner surface of the roof side; 5 is a tongue that is locked to this buckle and fixed to the other end of the shoulder belt 1; 6 is a lower part of the front panel. with a kneebar attached to the
It protects the lower body of the occupant.

A belt guide mechanism that automatically attaches and releases the shoulder belt 1 by guiding the shoulder belt 1 between the occupant restraint position and the illustrated release position in accordance with the opening and closing of the door 7 is installed on the inside surface of the roof side and the front. Guide rail 8 attached to the pillar
It consists of a slider 9 through which the shoulder belt 1 is inserted and guided, a geared wire 10 connected to this slider, and a drive device 11 that moves the slider 9 along the guide rail 8 via this geared wire. There is.

FIG. 2 shows a drive device according to an embodiment of the present invention, which is equipped with a rack and pinion type door opening/closing stroke width increasing means 12. As shown in FIG.

This rack and pinion type door opening/closing stroke width increasing means 1
2 is a rack 1 provided reciprocably within the door 7;
3, a pinion 14 meshing with the rack, a large gear 15 supported coaxially with the pinion, a small gear 16 meshing with the large gear, and a geared wire 10 supported coaxially with the small gear. 1 a driven gear 17, and an energizing spring 1 provided coaxially with the gear and the small gear 16;
It consists of 8.

A roller 19 is rotatably supported at the tip of the rack 13 of the door opening/closing stroke width increasing means 12, and the roller is engageable with a hook 21 fixed to the vehicle body 20.

The shaft 22 of the roller 19 is held in the recess 24 of the rack 13 by a compressible member 23, as shown in FIG.

Therefore, normally it is rotatably held in the recess 24 of the rack 13, but when the rack 13 is fixed and the shaft 22 is pulled with strong force, the member 23 is compressed and the recess 24 of the rack 13
The shaft 22 can be removed from 4.

The roller 19 further includes a side plate 25 to prevent the roller 19 from falling off the hook 21 when the rack 13 and the shaft 22 are disconnected.

The drive device configured as described above operates as follows.

First, the normal operation when the door is opened will be explained based on FIG. 4.

In this FIG. 4 and later-described FIGS. 5 and 6, the side plate 25 of the roller 19 is omitted for clarity.

When the door 7 is closed, the roller 19 held at the tip of the rack 13 runs into the notch 26 of the hook 21 and engages with it, as shown by the solid line in FIG. .

In this case, a distance a exists between the center of the roller 19 and the edge of the door 7.

Now, when the door 7 is opened by rotating it around the hinge 27 of the door 7, the distance between the center of the roller 19 and the end of the door 7 increases, and when the door is half open as shown by the dashed line, b becomes.

This distance difference (ba) is the door release stroke.

This door release stroke (b-a) is transmitted from the roller 19 to the rack 13 and is increased in width by the width increasing means 12.

The increased door opening/closing stroke is transmitted from the gear 17 to the slider 9 via the geared wire 10, and drives and guides the slider 9 along the guide rail 8, moving the shoulder belt 1 from the occupant restraint position to the release position ( 1).

In this case, the width ratio of the door opening/closing stroke is selected so that the shoulder belt 1 completely reaches the release position when the door is partially opened.

As described above, the door opening stroke is transmitted to the width increasing means 12 until the door is half opened, which is indicated by the dashed line.

That is, the roller 19 is engaged with the notch 26 of the hook 21.

In this case, the roller 19 is guided along the inner surface 26' of the recess 26.

When the door 7 is further opened from the half-open position, the roller 19 moves to the surface 26'.
It slides down and moves along the trajectory shown by the arrow in FIG. 4, and reaches the position shown by the two-dot chain line when the door is fully opened.

Normal door closing is performed as follows.

When the door is closed, the roller 19 moves in the direction opposite to the arrow from the fully open position shown in FIG. 4, and comes into contact with the outer surface 26'' of the notch 26 when the door is half open.

This condition is shown in solid lines in FIG.

Upon further closing of the door, the roller 19 is guided along the plane 26'' until it reaches the door closing position, which is shown in solid lines in FIG.

In the course of the roller 19 being guided along the plane 26'', the door closing stroke is transmitted from the rack 13 to the widening means 12, which actuate in the opposite direction to that of the previously described door opening process, and the shoulder Move the belt 1 to the occupant restraint position.

Next, the operation of the drive device when the vehicle body or door is deformed due to an accident or the like and the slider of the belt guide mechanism, the width increasing means, etc. cease to operate will be explained based on FIG.

In this case, the rack 13 remains in the door closed state shown in solid lines and does not move relative to the door 7.

Now, when force is applied to the door 7 in an attempt to open it, a door opening stroke occurs, and the rack 13 tries to separate from the hook 21 together with the door 7.

In this case, since the roller 19 remains engaged in the notch 26, the shaft 22 of the roller 19 compresses the member 23 and comes out of the recess 24 of the rack 13.

Therefore, the connection between the rack 13 and the hook 21 is released,
The door 7 can be opened freely, and the tip of the rack 13 moves along the arrow.

At that time, the roller 19 is attached to the hook 2 by the side plate 25.
It is held at 1.

By configuring the shaft 22 of the roller 19 to be detached from the rack 13 as described above, the door can be opened easily even in an emergency.

FIG. 7 shows another way of connecting the rollers 19 and the rack 13.

In this embodiment, a scissors-like object 27 is attached to the tip of the rack 13, and the scissors-like object 27 is urged by a spring 28 in the closing direction.

The shaft 22 of the roller 19 is held elastically between the scissors 27.

As explained above, in the present invention, a hook with a notch is fixed to the vehicle body or the door, and a roller that engages with the notch of the hook is rotatably attached to the door opening/closing stroke width increasing means, and the roller is rotatably attached to the door opening/closing stroke width increasing means. The direction and length of the notch are determined so that the roller engages with the notch between when the door is half open and the notch is disengaged between when the door is half open and when the door is fully opened. By simply opening the door halfway, the belt can be guided from the occupant restraint position to the occupant release position.

Therefore, it is easy to get on and off the vehicle in narrow spaces.

Additionally, the door opens and closes easily and smoothly.

Further, in the present invention, the roller is attached to the door opening/closing stroke width increasing means via the elastic retaining means so that it can be removed from the door opening/closing stroke width increasing means in an emergency, so that the belt guide mechanism becomes inoperable. You can also open the door when it is safe.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of a safety belt device equipped with one drive device for a belt guide mechanism according to an embodiment of the present invention, FIG. 2 is a diagram showing one drive device according to an embodiment of the present invention, and FIG. A diagram is shown in FIG. Figures 4 to 6 are diagrams showing how the drive device according to Figures 2 and 3 are connected, and Figure 7 is a diagram showing how the roller shaft and the width increasing means are connected in the drive device. It is a figure which shows the other connection aspect of width means. Symbols in the figure: 7...Door, 12...Door opening/closing stroke width increasing means, 19...Roller, 2
0...Vehicle body, 21...Hook, 22.
...Shaft, 23... Compressible member, 24...
...Concavity, 26...Notch, 26', 26
“...Guidance surface, 27... Scissors-like object, 28
...Spring.

Claims (1)

[Scope of Claims] 1. A driving device for a belt guide mechanism that guides a safety belt between an occupant restraint position and a release position in response to opening and closing of a door, which is a driving device for opening and closing a door or a door disposed in a vehicle body. In a mechanical drive device that is equipped with a stroke width increaser and responds to the door opening/closing stroke, a hook 21 with a notch 26 is fixed to the vehicle body 20 or the door 7, and a roller 19 that engages with the notch of this hook is fixed to the vehicle body 20 or the door 7. It is rotatably attached to the door opening/closing stroke width increasing means 12, and the roller 19 engages with the notch 26 between when the door is closed and half-opened, and the engagement between the roller and the notch is released between when the door is half-opened and fully opened. A driving device characterized in that the direction and length of the notch 26 are determined. 2. A belt guide mechanism that guides a safety belt between an occupant restraint position and a release position in response to the opening and closing of a door, and is a door opening/closing slot provided in the door or the vehicle body.
The mechanical drive device is equipped with a hook width increasing means and responds to the door opening/closing stroke, and a hook with a notch is fixed to the vehicle body or the door, and a roller that engages with the notch of the hook increases the door opening/closing stroke. The notch is rotatably attached to the width means so that the roller engages the notch between when the door is closed and half-open, and the engagement between the roller and the notch is released between when the door is half-open and when the door is fully opened. In a drive device in which the direction and length are determined, the roller 19 is attached to the door opening/closing stroke width increasing means 12 via elastic retaining means 23 and 27 so that it can be removed from the door opening/closing stroke width increasing means 12 in an emergency. A drive device characterized by: 3 The elastic holding means is the door opening/closing stroke width increasing means 12
3. The drive device according to claim 2, further comprising a compressible member 23 for elastically holding the shaft 22 of the roller 19, which is attached to the recess 24 of the roller 19. 4. The elastic holding means is a scissors-like object 27 attached to the door opening/closing stroke means 12 for elastically holding the shaft 22 of the roller 19, and this scissors-like object is biased by a spring 28 in the direction of closing it. A patented/operated device characterized by: