JPS6234850Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a seat belt device for protecting occupants in a vehicle emergency, and particularly to a seat belt device equipped with a mechanism for automatically moving a tongue plate.

[Conventional technology]

The seat belt device has an occupant wearing webbing for restraining the occupant, and in the event of a vehicle emergency, the webbing reliably restrains the occupant and prevents the occupant from colliding with objects. In addition, the seat belt device applies tension to the webbing with a predetermined take-up force in order to make the webbing tightly attached to the occupant, and after the occupant releases the webbing, the webbing automatically tightens due to this take-up force. It is then taken up by a winding device and stored.

In such a conventional technique, the middle part of the webbing is folded back by a through ring pivotally supported by the sidewall of the vehicle, and one end is wound up by a winding device attached to the sidewall. In addition, the other end of the webbing is locked to an anchor plate attached below the sidewall, and a tongue plate that can be moved in the longitudinal direction of the webbing when necessary is attached between the anchor plate and the through ring. ing. Therefore, the occupant sitting in the seat sometimes looks back or gropes to engage the tongue plate with the buckle to fasten the seat belt. (See Japanese Utility Model Application No. 55-125345 as an example.) [Problem to be solved by the invention] However, in the above-mentioned conventional technology, even when the door is opened, the anchor plate remains in the horizontal position. Since the tongue plate is located behind the passenger, the passenger must turn around or grope to pull the tongue plate toward the passenger, and then hold it again to engage and attach it to the buckle device, making it cumbersome to install. There were flaws.
The purpose of the present invention was made in view of the above-mentioned drawbacks, and is to make it easier to draw the tongue plate and to make it easier to attach the webbing.

[Means for solving problems]

However, in conventional seat belt devices, the webbing, tongue plate, etc. are attached to the side of the seat or pillar so that they do not get in the way when getting on and off the vehicle. It is necessary to pull the plate to the hand, hold it again, and engage and attach it to the buckle device, which has the disadvantage of being cumbersome to attach.

The object of the present invention was made in view of the above-mentioned drawbacks, and it is to provide a seat belt device that makes it easy to pull the tongue plate to the webbing.

In order to achieve this purpose, the present invention
a first biasing shaft that urges the take-up shaft in the webbing winding direction;
Due to the relationship between the second elastic body and the elastic body that biases the webbing boot in a direction that always tilts the webbing boot at a predetermined angle, the webbing boot is positioned on the side of the seat or pillar when the vehicle door is opened, and when the vehicle door is closed. The configuration is such that the webbing boot is tilted and the tongue plate is positioned near the passenger's hand.

〔Example〕

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

In FIG. 1, an occupant 12 seated on a seat 10 in a vehicle is designed to be fitted with a three-point seat belt by an occupant restraining webbing 14. That is, one end of the occupant restraint webbing 14 is attached to an anchor plate 20 (second
(see Figures 1 and 3), the middle part is folded back by a through ring 22 fixed to the upper part of the center pillar 16, and the other end is a winding device attached to the inside of the center pillar 16. 24
It is wound up. Furthermore, a tongue plate 26 is provided in the middle of the webbing 14.
4 is attached movably in the longitudinal direction,
After sitting on the seat 10, the occupant engages the tongue plate 26 through the seat 10 with a buckle device (not shown) that is installed upright from the floor 28 on the opposite side of the winding device 24, thereby removing the anchor plate 2.
Webbing 14 between 0 and tongue plate 26
The webbing 14 between the tongue plate 26 and the through ring 22 is attached to the waist of the occupant 12, and is attached to the shoulder of the occupant, resulting in a three-point seatbelt wearing state.

Next, the winding device 24 will be explained with reference to FIGS. 4 to 7. The frame 32 of the winding device 24
is attached to the center pillar 1 by multiple mounting bolts 34.
The legs 36, 3 are fixed to the inner plate 17 of No. 6, and stand upright from both sides of the frame 32.
A winding shaft 40 is rotatably supported at 8 and winds one end of the webbing 14 in a layered manner.

The axis of this winding shaft 40 is attached to the webbing 14 to the passenger.
It is attached to the center pillar at a predetermined angle to ensure proper placement.

A ratchet wheel 42 is fixed to the winding shaft 40 so as to rotate together with the winding shaft 40, and corresponds to a pawl 44 pivotally supported on the frame 32. A pendulum 48 is suspended from a bracket 46 protruding from the frame 32, and the pole 44 is placed on the pendulum 48 via a lever 49 pivotally supported by the bracket 46. This pendulum 4
As shown in FIG. 7, the axis of the lever 8 is vertical under the normal running condition of the vehicle, but when the vehicle is accelerated, it swings and pushes up the lever 49, so the pawl 44 rotates and the ratchet wheel 42, and the unwinding rotation of the winding shaft 40 (arrow A in Fig. 6)
direction) is now stopped.

As shown in FIG. 7, the legs 3 of the frame 32
A slit 5 is provided at the end of the winding shaft 40 protruding from the winding shaft 8.
0 is formed, and the inner end of the first mainspring spring 52 is locked. This first mainspring spring 52
The outer end of is locked inside the ratchet foil 54.

This ratchet wheel 54 has a boss portion 56 rotatably supported by the end of the winding shaft 40, and a plurality of ratchet gears 58 are carved on the outer circumference. The inner end of a second mainspring spring 60 is secured to the outer periphery of the boss portion 56 of the ratchet wheel 54. The second mainspring spring 60 is designed to have a larger biasing force than the first mainspring spring 52, and its outer end is locked to the inner circumference of a spring cover 62 attached to the outside of the leg 36. There is.

These first and second mainspring springs 52 and 60 are connected in series via the ratchet wheel 54, and urge the take-up shaft 40 in the webbing winding direction (opposite to the direction of arrow A). There is.

A support shaft 64 passes through the lower portions of the legs 36 and 38 of the frame 32, and a lever 66 is pivotally supported on the outside of the leg 38 of the support shaft 64. This lever 66 is bent into an L-shape, with its tip facing toward the front of the vehicle as shown in FIG.
It corresponds to

The lever 68 is fixed to a rotating shaft 72 that is rotatably supported by a bearing 70 fixed to the center pillar 16, so that the lever 68 rotates together with the rotating shaft 72.
A force receiving lever 74 is fixed to the other end of the rotating shaft 72 and projects into a vehicle door opening 76 as shown in FIGS. 4 and 5. Therefore, this force-receiving lever 74 is disposed within the movement locus of the vehicle door 75, and when the door is closed, the lever 68 rotates the lever 66 by rotating to the position indicated by the two-dot chain line in FIG. It's designed to move.

On the other hand, as shown in FIG. 8, on a support shaft 64 that is rotatably supported on the frame 32, a cam 78 is biased counterclockwise by a torsion coil spring 77 near the leg portion 38.
is fixed thereto and corresponds to the ratchet arm 80. This ratchet arm 80 has a pin 82
It is pivotally supported by the leg part 38, and is rotated clockwise in FIG. 8 by the biasing force of a torsion coil spring 84 interposed between the leg part 38 and approaches the cam 78. , a part of which comes into contact with the spring cover 62 and is separated from the cam 78 .

A small pawl 86 is pivotally supported at the tip of the ratchet arm 80 by a pin 88, and is biased to rotate counterclockwise in FIG. ing. This ratchet arm 80 is rotated by the cam 78 so that the small pawl 86 meshes with the ratchet gear 58 and the ratchet wheel 54 is rotated to the eighth position.
Although the small pawl 86 is designed to prevent rotation in the clockwise direction in the figure, since the small pawl 86 can be rotated clockwise around the pin 88, the ratchet wheel 54 rotates the small pawl 86 clockwise around the pin 88. It can be rotated counterclockwise while rotating.

The feature of this embodiment is that, in the above-described configuration, the webbing 14 is formed to cover the periphery of the webbing 14, extends a predetermined distance in the longitudinal direction of the webbing 14, and has a lower end rotatable to the bolt 18. A webbing boot 92 supported by the webbing boot 92 is provided, and as shown in FIGS. 3 and 9, the lower end of the webbing boot 92
A distinctive feature is that a coil spring 96 is suspended between the webbing boot 92 and a support plate 94 fixed to the support plate 94, which always biases the webbing boot 92 in the direction shown by the solid line in FIG. The biasing force of this coil spring 96 against the webbing boot 92 is greater than the biasing force of the first mainspring spring 52 against the winding shaft 40, but the biasing force of the second mainspring spring 52
The urging force applied to the winding shaft 40 of No. 2 is set to be smaller than the urging force applied to the winding shaft 40 of No. 2.

[Effect of idea]

Therefore, in the device configured in this way, when the vehicle door 75 is closed, the vehicle door 75 closes.
The lever 68 rotates the lever 66 clockwise in FIG. 6, and as a result, the cam 78 rotates the ratchet arm 80 counterclockwise in FIG. 8. The small pawl 86 meshes with the ratchet wheel 54 by moving it.

As a result, the connecting portions of the mainspring springs 52 and 60 connected in series are locked, so that the biasing force of the second mainspring spring 60 does not act on the winding shaft 40. Only the biasing force of the first mainspring spring 52, which has a weak biasing force, acts. Therefore, in this case, the biasing force acting in the direction to tilt the webbing boot 92 becomes larger than the biasing force acting on the winding shaft 40,
Therefore, the webbing boots 92 are tilted to the position of the occupant's waist, as shown by the solid line in FIG. This makes it easier to pull the tongue plate 26 toward the user's hand, thereby improving the ease of attaching the webbing.

On the other hand, when the vehicle door 75 is opened, the ratchet arm 80 is separated from the ratchet wheel 54 due to the opposite effect to that described above, so that the strong biasing force of the second mainspring spring 60 acts on the winding shaft 40 again. In this case, the biasing force acting on the take-up shaft 40 is greater than the biasing force acting in the direction to tilt the webbing boot 92.
The webbing 14 is reliably wound onto the winding shaft 40, and the webbing boot 92 is attached to a sheet (or pillar) as shown by a two-dot chain line 92' in FIG.
Stand up to the sides.

In addition, by applying a friction reducing member such as Teflon tape to the sliding portion of the through ring 22, the sliding resistance with the webbing 14 can be reduced, which has the effect of allowing smooth operation. .

As set forth above, according to the seat belt device according to the present invention, there is provided a first and a second belt which urges the take-up shaft of the webbing for occupant restraint in the wind-up direction of the webbing and which are connected in series. a locking device that locks a connecting portion between the second elastic body and the first and second elastic bodies to prevent the biasing force of the second elastic body from acting on the winding shaft when the vehicle door is closed; and a webbing having a lower end rotatably supported by a bolt that fixes an anchor plate, to which one end of the webbing is locked, to a center pillar and extending a predetermined distance in the longitudinal direction of the webbing. Suspended between the boot, the lower end of the webbing boot and the bolt, and biasing the webbing boot in a direction that always tilts the webbing boot at a predetermined angle;
Since the configuration includes an elastic body whose biasing force is set to be larger than the biasing force of the first elastic body and smaller than the biasing force of the second elastic body, the webbing boot is attached when the vehicle door is opened. By positioning the tongue plate on the side of the seat or pillar, and by tilting the webbing boot when the vehicle door is closed, the tongue plate can be positioned within the passenger's hand.This prevents the tongue plate, webbing, etc. from getting in the way when ascending and descending. This has the effect of making it easier to pull the tongue plate closer to the user's hand and improving the ease of wearing the webbing.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of the seat belt device according to the present invention as seen from outside the vehicle, FIGS. 2 and 3 are enlarged sectional views of the main parts of the seat belt device shown in the previous figure, and FIG. Partially enlarged view of Figure 1, Figure 5 is the 4th
Figure 6 is a front view of the winding device corresponding to the cross section taken along line - in Figure 5, Figure 7 is a left side view of figure 6, and Figure 8 is an enlarged sectional view taken along line - in figure 7. , No. 9
The figure is an enlarged perspective view of the main parts of the seat belt device. 14... Webbing, 16... Center pillar, 18... Bolt, 20... Anchor plate, 24... Winding device, 26... Tongue plate, 40... Winding shaft, 52... First mainspring spring, 54... Ratchet wheel, 60... Second
Mainspring spring, 66, 68... Lever, 75...
Vehicle door, 92...Webbing boots, 96...
coil spring.

Claims (1)

[Scope of utility model registration request] A take-up shaft for occupant restraint webbing, first and second elastic bodies that urge the take-up shaft in the webbing take-up direction and are connected in series, and when the vehicle door is closed, the first and second elastic bodies Lock the connection part of the elastic body and
a webbing take-up device having a locking device that prevents the biasing force of an elastic body from acting on the take-up shaft; A webbing boot is rotatably supported and extends a predetermined distance in the longitudinal direction of the webbing, and the webbing boot is suspended between the lower end of the webbing boot and the bolt, and the webbing boot is tilted toward the front of the vehicle. The present invention is characterized by comprising an elastic body configured to bias the elastic body so as to set the biasing force to be larger than the biasing force of the first elastic body and smaller than the biasing force of the second elastic body. Seat belt device.