JP2533148Y2 - Shoulder anchor height adjustment device - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention adjusts the height of a shoulder anchor by moving a shoulder anchor, which is inserted in the middle part in the longitudinal direction of the webbing and is disposed at the upper part of the side wall of the vehicle, in the vertical direction of the vehicle. The present invention relates to a shoulder anchor height adjusting device.

[0002]

2. Description of the Related Art In a three-point seat belt device for restraining an occupant, a tongue plate slidably inserted into an intermediate portion of a webbing is engaged with a buckle device so that the intermediate portion of the webbing is inserted into the buckle device. In this state, the webbing from the shoulder anchor to the tongue plate to be supported is the webbing on the shoulder side, and the webbing from the tongue plate to the anchor plate is the webbing on the lap side.

[0003] The shoulder anchor is arranged at the upper part of the side wall of the vehicle, and a shoulder anchor height adjusting device for adjusting the height according to the physique of the occupant has been conventionally used. The shoulder anchor height adjusting device includes a manually operated type in which the occupant adjusts the height by selectively engaging the shoulder anchor with the frame side as appropriate, and adjusting the height of the shoulder anchor using a motor. Some are electrically operated.

[0004] Among them, in the electrically operated shoulder anchor height adjusting device, the driving force of the motor is generally applied to a feed screw which is arranged in the vehicle vertical direction and whose both ends in the axial direction are supported by the frame. The transmission and rotation of the feed screw move the shoulder anchor screwed with the feed screw in the vertical direction of the vehicle.

[0005]

However, according to this structure, when the vehicle suddenly decelerates, the feed screw receives the load applied to the webbing due to the inertial movement of the occupant, and is supported by the feed screw. It had to be made of metal to ensure rigidity. For this reason, there arises a problem that the weight of the feed screw and, consequently, the height of the shoulder anchor height adjusting device is increased, and the cost is increased.

The present invention has been made in view of the above-described circumstances, and has as its object to obtain a shoulder anchor height adjusting device which can achieve weight reduction and cost reduction.

[0007]

According to the present invention, an intermediate portion in the longitudinal direction of a webbing, one end of which is wound by a winding device and the other end of which is locked by an anchor plate, is inserted and disposed above a side wall of a vehicle. A shoulder anchor height adjustment device that adjusts the height of the shoulder anchor by moving the shoulder anchor along the vehicle up-down direction, wherein the base of the shoulder anchor is screwed and rotated about an axis. A feed screw for moving the shoulder anchor in the vertical direction of the vehicle, support means attached to the upper part of the side wall of the vehicle, for supporting both ends of the feed screw in the axial direction, and a hook provided at the base of the shoulder anchor The feed screw or the shoulder having an engagement portion and an engaged portion provided at a position facing the engagement portion of the support means and capable of engaging with the engagement portion. The base of the anchor is normally in a non-deflected state and is also in a deflected state when the vehicle is suddenly decelerated. When the feed screw or the base of the shoulder anchor is in a non-deflected state, the engaging portion is engaged with the engaged portion. The engaging portion and the engaged portion are engaged when the feed screw or the base of the shoulder anchor is in a bent state. .

[0008]

In the shoulder anchor height adjusting device according to the present invention, the feed screw or the base of the shoulder anchor is normally in a non-deflected state. For this reason, the engaging portion provided at the base of the shoulder anchor and the engaged portion provided at a position facing the engaging portion of the support means are maintained in a non-engaged state.

In this state, when the occupant adjusts the height of the shoulder anchor, the feed screw is rotated around the axis. For this reason, the shoulder anchor is moved in the vertical direction of the vehicle, and the shoulder anchor is set at a desired height. As a result, the height of the webbing inserted into the shoulder anchor with respect to the occupant changes, so that the mounting height of the webbing of the occupant is adjusted.

On the other hand, when the vehicle suddenly decelerates, the occupant tries to move inertially while being restrained by the webbing.
The load applied to the webbing acts on the shoulder anchor and the feed screw. Therefore, the feed screw or the base of the shoulder anchor is bent, so that the engaging portion and the engaged portion are engaged. Therefore, the load acting on the shoulder anchor via the webbing is supported by the support means since the engaging portion and the engaged portion are in the engaged state. Since the supporting means is mounted on the upper side wall of the vehicle, the load is supported by the upper side wall of the vehicle.

As a result, it is not necessary to support the load by the feed screw itself, so that the strength and weight of the feed screw can be reduced.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A shoulder anchor height adjusting device 10 according to an embodiment of the present invention will be described below with reference to FIGS. In these figures, the vehicle F shown as appropriate
R indicates the vehicle front side, arrow UP indicates the vehicle upper side, and arrow IN indicates the vehicle interior.

As shown in FIG. 3, a winding device 14 is provided below the side wall 12 of the vehicle.
One end of 6 is wound up in layers on a winding shaft (not shown).
An anchor plate 18 is fixed to a lower portion of the side wall 12 of the vehicle, and the other end of the webbing 16 is wound and locked. Further, an intermediate portion of the webbing 16 is inserted into a shoulder anchor 20 of the shoulder anchor height adjusting device 10 provided on an upper portion of the side wall 12 of the vehicle, and is folded. Further, a tongue plate 22 is inserted through an intermediate portion of the webbing 16, and the seat 2 in the driver's seat is provided.
4 can be engaged with and disengaged from a buckle device 26 erected at the center of the vehicle cabin.

The occupant grasps the tongue plate 22 and engages it with the buckle device 26, thereby changing the webbing 16 from the shoulder anchor 20 to the tongue plate 22 to the shoulder side webbing 16A and the webbing 16 from the tongue plate 22 to the anchor plate 18. A three-point seat belt device 2 in which the webbing 16 is a webbing 16B on the lap side.
8 can be set. When the occupant releases the webbing mounted state, the buckle device 2
When the release button 26A of No. 6 is pressed, the tongue plate 22 is detached from the buckle device 26, and the webbing 16 is wound on the winding device 14 by the urging force.

As shown in FIG. 2, the shoulder anchor height adjusting device 10 has a frame body 30 as a support means fixed to an upper portion of the side wall 12 of the vehicle. The frame main body 30 includes a pair of support walls 36 and 38 having an L-shaped cross section and having a longitudinal direction along the vehicle vertical direction,
Rectangular flat plate-like bearing walls 36, 38 fixed to both ends of the support walls 36, 38 in the vehicle vertical direction;
Mounting flanges 76, 78 secured to both sides of the 6, 38
And consisting of

The mounting flanges 76 and 78 are mounted on the upper part of the side wall 12 of the vehicle by bolts (not shown). A single slit 40 is formed between the support walls 36 and 38 along the vertical direction of the vehicle, and the mounting bolt 42 of the shoulder anchor 20 penetrates the slit 40. The mounting bolt 42 is screwed to a block 44 as a base of a substantially rectangular parallelepiped shoulder anchor disposed in the frame main body 30. A feed screw 4 arranged in the center of the block 44 with the vehicle vertical direction as the longitudinal direction.
6 is screwed. Each side surface of the block 44 on the vehicle front-rear direction side is in contact with the inner side surface of each of the support walls 36 and 38. Therefore, when the feed screw 46 rotates,
The block 44 moves up and down while being guided by the inner surfaces of the pair of support walls 36 and 38.

A lock tooth 48 is formed on the surface of the block 44 on the vehicle interior side as an engaging portion whose teeth are directed downward in the vehicle. In addition, a pair of support walls 36, 3
On the surface of the side 8 facing the lock teeth 48, meshing teeth 50 are formed that are engaged with the lock teeth 48 and whose teeth are directed toward the upper side of the vehicle.

One end (the upper end of the vehicle) 46A of the feed screw 46 in the axial direction is supported by a bearing wall 36 located on the upper side of the vehicle. The other end of the feed screw 46 in the axial direction (the end on the lower side of the vehicle) 46B is connected to a rotating shaft 62 of a motor 64, which will be described later, which is supported via a bearing 90 on the bearing wall 36 located on the lower side of the vehicle. Are linked.

That is, the other end 46B of the feed screw 46 in the axial direction (the side of the bearing wall 38 located on the lower side of the vehicle) is formed in a hollow cylindrical shape, and has a negative keyway as viewed in the axial direction. 60 are formed. A rotary shaft 62 having a substantially cylindrical shape is inserted into a hollow portion of the other end 46 </ b> B of the feed screw 46 in the axial direction. The rotating shaft 62 is formed integrally with a minus-shaped projection 62A that is fitted into the key groove 60. This rotating shaft 62
Are connected to the motor 64 and rotate forward or backward by receiving the driving force of the motor 64. In addition,
The motor 64 is driven (forward rotation, reverse rotation) by operating an operation switch provided on an armrest or the like (not shown).
And stop.

The above-described feed screw 46 is formed smaller in diameter, that is, thinner than the conventional one, so that the weight is reduced and the rigidity is relatively low. For this reason, as shown in FIG. 1, when a load equal to or more than a predetermined value acts via the shoulder anchor 20 during rapid deceleration of the vehicle, the feed screw 46 changes from the non-deflection state shown by the solid line in FIG. The flexed state shown is reached. When the feed screw 46 is in the non-deflected state, the lock teeth 48 and the meshing teeth 50 are in the non-engaged state, but when the feed screw 46 is in the bent state,
The locking teeth 48 and the meshing teeth 50 are in the engaged state.

The operation of this embodiment will be described below. In order to mount the webbing 16 after the occupant sits on the seat 24, the tongue plate 22 may be engaged with the buckle device 26. Thus, the occupant can use the three-point seat belt device 28 with the webbing 16 from the shoulder anchor 20 to the tongue plate 22 as the webbing 16A on the shoulder side and the webbing 16 from the tongue plate 22 to the anchor plate 18 as the webbing 16B on the lap side. Of the webbing is mounted.

In the state after the mounting of the webbing, the physique of the occupant and the mounting position of the webbing 16 on the shoulder side may be inappropriate. In this case, by operating an operation switch (not shown), the motor 64 is driven to move the block 44 upward or downward. As a result, the height of the shoulder anchor 20 relative to the occupant is changed and adjusted to a desired height. In this state, the feed screw 46 maintains the non-deflection state shown by the solid line in FIG. Therefore, the lock teeth 48 and the meshing teeth 50 are not engaged.

Next, when the vehicle suddenly decelerates from this state, the occupant tries to inertially move toward the front of the vehicle while being restrained by the webbing 16. At this time, a pressing force from an occupant acts on the webbing 16, and this pressing force is transmitted to the shoulder anchor 20 as webbing tension. Then, the feed screw 46 bends toward the vehicle interior via the shoulder anchor 20 as shown by a two-dot chain line in FIG. Therefore, the lock teeth 48 mesh with the meshing teeth 50, that is, the locking teeth 48 are engaged. Therefore, the feed screw 4 via the shoulder anchor 20
The load acting on 6 is transmitted to the frame body 30 and is supported by the side wall 12 of the vehicle to which the frame body 30 is attached.

As described above, in this embodiment, when the vehicle suddenly decelerates, the lock teeth 48 formed on the block 44 integrally attached to the shoulder anchor 20 are formed on the pair of support walls 36, 38 of the frame body 30. By engaging with the engaged meshing teeth 50 and being in the engaged state, the load from the webbing 16 can be received by the frame main body 30 without being received by the feed screw 46, and thus the load is supported by the side wall 12 of the vehicle. be able to. For this reason,
The feed screw 46 bends when a load equal to or more than a predetermined value acts thereon and has only the function of moving the block 44 up and down. Therefore, the feed screw 46 can be made thinner and lighter. Rigidity can be reduced. Therefore, for example, the feed screw 46 can be made of resin. As a result, the weight and cost of the shoulder anchor height adjusting device 10 can be reduced.

In this embodiment, since the feed screw 46 is bent, the material of the feed screw 46 can be changed.
The load at the time of bending can be easily adjusted, and it has resilience to a certain load.

In the present embodiment, the feed screw 46 itself is configured to be bent. However, the present invention is not limited to this. As shown in FIGS. 4 and 5, the block 80 with which the shoulder anchor 20 is screwed is bent. You may comprise so that it may not be. In this configuration, the cross section of the block 80 along the axial direction of the feed screw 82 has a U-shape, and the middle portion of the block 80 is normally in a non-deflected state as shown in FIG.
When the vehicle suddenly decelerates, the middle portion of the block 80 is pulled by the shoulder anchor 20 to be bent as shown in FIG. According to this configuration, in order to deflect the block 80, the feed screw 82 needs to have a certain strength. However, since the load applied at the time of rapid deceleration of the vehicle is received by the frame body 30 as in the above-described embodiment, The weight and rigidity of the feed screw 80 can be reduced to some extent.

[0027]

As described above, the shoulder anchor height adjusting device according to the present invention has an excellent effect that the weight and cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view taken along line 1-1 of FIG. 2 showing a main part of a feed screw and the like of a shoulder anchor height adjusting device according to the present embodiment.

FIG. 2 is a perspective view showing the shoulder anchor height adjusting device of FIG. 1;

FIG. 3 is a schematic side view of a vehicle equipped with the shoulder anchor height adjusting device of FIG.

FIG. 4 is a cross-sectional view corresponding to FIG. 1 and showing a main part of a block, a feed screw, and the like in a state where the block is not bent, according to a modification in which the block is bent instead of bending the feed screw.

5 is a cross-sectional view corresponding to FIG. 4 and showing a state where the block of FIG. 4 is bent.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Shoulder anchor height adjustment device 12 Vehicle side wall 14 Winding device 16 Webbing 18 Anchor plate 20 Shoulder anchor 30 Frame body (supporting means) 44 Block (base of shoulder anchor) 46 Feed screw 46A One end 46B The other end Part 48 Lock tooth (engagement part) 50 Mesh tooth (engaged part) 80 Block (base of shoulder anchor) 82 Feed screw

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 2-114559 (JP, U) JP-A 2-11732 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] 1. A shoulder anchor disposed at an upper portion of a side wall of a vehicle through which an intermediate portion in a longitudinal direction of a webbing, one end of which is wound by a winding device and the other end is locked by an anchor plate, is inserted along a vertical direction of the vehicle. A shoulder anchor height adjusting device that adjusts the height of the shoulder anchor by moving the shoulder anchor in a vertical direction of the vehicle by rotating the base of the shoulder anchor around an axis. A feed screw to be moved; support means attached to an upper portion of the side wall of the vehicle to support both axial ends of the feed screw; an engaging portion provided at a base of the shoulder anchor; An engaged portion provided at a position facing the engaging portion and engageable with the engaging portion, wherein the base of the feed screw or the shoulder anchor is in a normal state. When the vehicle is suddenly decelerated, the vehicle is in a flexed state.When the feed screw or the base of the shoulder anchor is in a non-bent state, the engaging portion and the engaged portion are not flexed. A shoulder anchor height, wherein the engaging portion and the engaged portion are engaged when the feed screw or the base of the shoulder anchor is in a bent state. Adjustment device.