JP3341508B2 - Temporary fastening structure for seat belt retractor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temporary fixing structure for a seat belt retractor mounted on a vehicle such as an automobile.

[0002]

2. Description of the Related Art FIGS. 5 to 7 show a temporary fixing structure of a conventional seat belt retractor. Reference numeral 1 denotes an anchor bracket on a vehicle body side for fixing a seat belt retractor 5, and a back surface thereof is concentric with a bolt insertion hole 2. A weld nut 3 is provided.

A pair of inverted L-shaped engaging claws 4 projecting forward from the anchor bracket 1 are provided on the upper edge of the anchor bracket 1 at right and left sides of a center line passing through the center of the bolt insertion hole 2. The projections are provided symmetrically with respect to each other at an appropriate opening angle in opposite directions.

On the other hand, a bracket 7 is extended below the retractor housing 6 of the seat belt retractor 5 on which the seat belt 8 is wound, and the bracket 7 is provided above the bolt insertion hole 9 of the bracket 7. An elongated hole 10 in the vertical direction slightly wider than the locking claw 4 to be inserted and engaged with the claw 4 is substantially symmetrical with the locking claw 4 symmetrically with respect to a center line passing through the center of the bolt insertion hole 9. They are formed so as to be inclined in opposite directions at the same opening angle.

In the seat belt retractor 5, the bracket 7 is overlapped on the front surface of the anchor bracket 1, a bolt 11 is inserted into bolt insertion holes 2, 9, and the bolt 11 is screwed into the weld nut 3 on the back surface of the anchor bracket 1. At the time of this attachment, the slot 10 of the bracket 7 is inserted into the locking claw 4 of the anchor bracket 1, and the seat belt retractor 5 is moved down by its own weight. By locking the upper side edge of the long hole 10 to the side edge, the seat belt retractor 5 can be temporarily fixed to the anchor bracket 1, and the pair of locking claws 4 and the long hole 10 can be fixed as described above. Since the locking claw 4 and the upper side edge of the elongated hole 10 are tightly engaged with each other at the time of temporary fixing, rattling can be avoided. It is intended.

This similar structure is disclosed, for example, in Japanese Utility Model Application Laid-Open No. 63-13 / 1988.
No. 7059.

[0007]

When the seat belt retractor 5 is temporarily fixed to the locking claws 4 of the anchor bracket 1, the seat belt winding portion 8a faces the rear RR of the anchor bracket 1, and the seat belt retractor 5 The center of gravity of the seatbelt retractor 5 is located at a position obliquely above and rearward of the locking point between the locking claw 4 and the elongated hole 10. Tend to rotate in the direction of falling to the rear RR side about the line L (FIG. 6) connecting the locking points.

For this reason, when the worker releases the seat belt retractor 5 after temporarily fixing it to take out the bolt 11 or a tool (not shown), the seat belt retractor 5 rotates to the rear RR side, and 6 moves toward the front FR side of the locking claw 4, that is, the free end side, and the elongated hole 10 is disengaged from the locking claw 4 and is shown by a two-dot chain line in FIG. Thus, there is a possibility that it will come off from the temporary fixing.

In view of the above, the present invention enables the seat belt retractor to be temporarily temporarily fixed to the locking claw of the anchor bracket, so that the seat belt retractor can be released from the locking claw even if the hand is released from the seat belt retractor during mounting. An object of the present invention is to provide a temporary fixing structure of a seat belt retractor which does not come off.

[0010]

According to the first aspect of the present invention, a pair of inverted L-shaped engaging claws are inclined at opposite angles to the upper edge of the anchor bracket on the vehicle body side at an appropriate angle to be symmetrical left and right. On the other hand, a long slot in the vertical direction which is inserted into and engaged with the locking claw on a bracket provided on the lower portion of the retractor housing is inclined in opposite directions at substantially the same angle as the locking claw and is symmetrical left and right. And the upper side edge of the elongated hole is locked and temporarily fixed to the upper side edge of the locking claw by the weight of the seat belt retractor, and the lower side edge of the locking claw is formed. In addition, when the seat belt retractor is rotated by its own weight around a line connecting the locking point with the upper side edge of the locking claw, the notch portion engaging the lower side edge of the long hole is formed. It is characterized by having been provided.

According to a second aspect of the present invention, a slope portion for guiding the notch portion according to the first aspect to a lower side edge of the long hole, and a locking edge where the lower side edge of the long hole abuts. It is characterized by comprising.

According to a third aspect of the present invention, the restriction angle of the self-weight rotation of the seat belt retractor by the notch portion according to the first and second aspects is set to a maximum of 13 degrees.

[0013]

According to the first aspect, the seat belt retractor is manually stopped in a state where the elongated hole of the bracket on the lower side of the retractor housing is inserted and engaged with the locking claw on the upper edge of the anchor bracket to temporarily fix the seat belt retractor. When the seat belt retractor is released, the seat belt retractor is rotated by its own weight around a line connecting the locking point between the upper side edge of the long hole and the upper side edge of the locking claw, but the lower side of the long hole is The rim enters and engages with a notch provided on the lower side edge of the locking claw, and the rotation of the seat belt retractor by its own weight is restricted, so that separation from the locking claw is prevented.

According to the second aspect, when the seat belt retractor rotates by its own weight in a temporarily fixed state, the lower side edge of the long hole is guided to the slope portion of the notch at the lower edge of the locking claw, and the notch is inserted into the notch. Since it enters properly and abuts and engages with the locking edge, the lower side edge of the long hole may shift due to interference with the lower edge of the locking claw, and the engagement with the notch may become unstable. Therefore, the seat belt retractor can be more reliably prevented from coming off from the locking claws.

According to the third aspect of the present invention, since the restriction angle of the self-weight rotation of the seat belt retractor by the notch is set to a maximum of 13 degrees, the lower portion of the retractor housing is temporarily stopped when the rotation of the seat belt retractor is restricted. The bracket does not separate greatly from the anchor bracket,
The work of fastening the bracket to the anchor bracket can be easily performed.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings, in which the same reference numerals are given to the same parts as in the above-mentioned conventional construction.

In FIGS. 1 to 3, a pair of inverted L-shaped locking claws 4 projecting from the front side of the anchor bracket 1 pass through the center of the bolt insertion hole 2 on the upper edge of the anchor bracket 1 on the vehicle body side. The projections are provided symmetrically with respect to the center line and inclined in opposite directions at an appropriate opening angle.

On the other hand, a bracket 7 provided on the lower side of the retractor housing 6 of the seat belt retractor 5 includes:
An elongated hole 10 in the vertical direction slightly wider than the locking claw 4 to be inserted into and engaged with the locking claw 4 is provided above the bolt insertion hole 9 with a center line passing through the center of the bolt insertion hole 9 as a right and left line. The elongated holes 10 are inserted symmetrically in the opposite directions at substantially the same opening angle as the locking claws 4. The elongated holes 10 are inserted into the locking claws 4, and due to the weight of the seat belt retractor 5, these elongated holes 10 are formed.
The upper side edges of the locking claws 4 are engaged with each other so that the seat belt retractor 5 can be temporarily fixed.

These basic structures are the same as those of the conventional structure, except that a seat belt retractor 5 is temporarily fixed to the lower edge of the locking claw 4 by its own weight and is located on the upper side of the locking claw 4. A notch that engages with a lower side edge of the long hole 10 when rotated about a line L (see FIG. 7) connecting the locking point between the edge and the upper side edge of the long hole 10. 12 are provided.

In the present embodiment, the notch 12 is provided with a slope portion 12a for guiding the lower side edge of the long hole 10;
The lower side edge of the locking claw 4 is formed substantially at a right angle to the lower side edge, and the lower side edge of the long hole 10 is configured to be in contact with the locking edge 12b.

According to the above embodiment, when the seat belt retractor 5 is fixed to the anchor bracket 1, the long hole 10 of the bracket 7 below the retractor housing 6 is extended to the front FR side of the anchor bracket 1. The seat belt retractor 5 is inserted into the pawl 4 and lowered by its own weight to lock the upper side edge of the elongated hole 10 on the upper side edge of the locking claw 4, so that the seat belt retractor 5 Temporarily fixed to 1.

When the worker releases his / her hand from the seat belt retractor 5 in such a temporarily fixed state, the seat belt retractor 5 is moved by its own weight to the upper side edge of the elongated hole 10 and the upper side edge of the locking claw 4. With the rotation centered on the line L connecting the locking points with the locking claw 4, the lower side edge of the elongated hole 10 is provided on the lower side edge of the locking claw 4 by this rotation. The seat belt retractor 5 enters and engages with the notch 12, whereby the rotation of the seat belt retractor 5 by its own weight is restricted, and the seat belt retractor 5 is prevented from coming off from the locking claw 4.

Particularly, in this embodiment, the notch 12
A slope portion 12a for guiding the lower side edge of the long hole 10.
And the locking edge 12b with which the lower side edge of the long hole 10 abuts.
During rotation of its own weight, the lower side edge of the long hole 10 is
a to properly enter the notch portion 12 and engage with the locking edge 12.
b, and the lower side edge of the long hole 10 is displaced by interference with the lower side edge of the locking claw 4, and the engagement with the notch 12 becomes unstable. Thus, the seat belt retractor 5 can be more reliably prevented from coming off from the locking claws 4.

Here, the seat belt retractor 5 is temporarily fixed to the anchor bracket 1 by restricting its own weight rotation by the notch 12 as described above, and is fastened and fixed by the bolt 11 and the weld nut 3, as shown in FIG. As shown in the figure, if the restriction angle a of the self-weight rotation of the seat belt retractor 5 is large, the bracket 7 is too far from the front surface of the anchor bracket 1 and the insertion of the bolt 11 into the bolt insertion holes 2 and 9 is only deteriorated. In addition, when the bolt 11 is screwed into the weld nut 3, the load of the seat belt retractor 5 acts on the bolt 11 in the direction in which the bolt 11 comes off, increasing the bolt fastening torque and deteriorating the workability.

Therefore, the restriction angle a of the self-weight rotation of the seat belt retractor 5 is set to a maximum of 13 degrees, which is empirically confirmed, and the distance between the bracket 7 and the front surface of the anchor bracket 1 is determined by this angle setting. Is shortened as much as possible to improve the insertability of the bolt 11 into the bolt insertion holes 2 and 9 and to reduce the bolt fastening torque to improve workability.

In the above embodiment, the locking claws 4 and the elongated holes 12 are provided symmetrically with respect to the left and right sides with the opening angle upward and inclined in the opposite directions at an angle. On the contrary, as shown in FIG. The claw 4 and the long hole 12 may be provided with a downward opening angle.

[0027]

As described above, according to the present invention, the following effects can be obtained.

According to the first aspect, a notch portion is formed at the lower side edge of the locking claw with which the lower side edge of the long hole engages when the seat belt retractor rotates by its own weight in a temporarily fixed state. Therefore, even if the hand is released in the temporarily fixed state, the seat belt retractor does not detach from the locking claw, and therefore, the work of fixing the seat belt retractor to the anchor belt can be further improved.

According to the second aspect, when the seat belt retractor rotates by its own weight in the temporarily fixed state, the lower side edge of the long hole is guided to the slope of the notch at the lower edge of the locking claw. Since it enters properly and abuts and engages with the locking edge, the lower side edge of the long hole may shift due to interference with the lower edge of the locking claw, and the engagement with the notch may become unstable. Therefore, the seat belt retractor can be more reliably prevented from coming off from the locking claws.

According to the third aspect, the restricting angle of the self-weight rotation of the seat belt retractor by the notch portion is set at a maximum of 13 degrees, and the bracket below the retractor housing is temporarily stopped in a state where the rotation of the seat belt retractor is restricted. Since the bracket is not largely separated from the anchor bracket, the work of fastening the bracket to the anchor bracket can be easily performed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a side view showing a temporarily fixed state of the seat belt retractor according to the first embodiment of the present invention.

FIG. 3 is a plan view showing a cutout portion of the locking claw according to the first embodiment of the present invention.

FIG. 4 is a front view showing an arrangement state of a locking claw and a long hole according to a second embodiment of the present invention.

FIG. 5 is an exploded perspective view showing a conventional structure.

FIG. 6 is a side view showing a seat belt retractor temporarily fixed state of a conventional structure.

FIG. 7 is a front view showing an arrangement state of a locking claw and a long hole having a conventional structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Anchor bracket 4 Locking claw 5 Seat belt retractor 6 Retractor housing 7 Bracket 10 Long hole 12 Notch

Claims (3)

(57) [Claims] 1. An inverted L is provided on an upper edge of an anchor bracket on a vehicle body side.
A pair of U-shaped engaging claws are inclined in opposite directions at an appropriate angle and project symmetrically, while the brackets provided on the lower side of the retractor housing are inserted and engaged with the engaging claws. Are formed at right angles to each other at substantially the same angle as the locking claw, and the upper side edge of the long hole is engaged with the upper side edge of the locking claw by the weight of the seat belt retractor. In the structure in which the locking pawl is temporarily stopped, the seat belt retractor rotates a line connecting the locking point with the upper side edge of the locking claw by its own weight on the lower side edge of the locking claw. A temporary fixing structure for a seat belt retractor, wherein a notch portion is provided for engaging a lower side edge of a long hole when rotating about a center. 2. A notch portion comprising a slope portion for guiding a lower side edge of a long hole and a locking edge on which the lower side edge of the long hole abuts. A temporary fixing structure of the seat belt retractor described in the above. 3. The temporary fixing structure for a seat belt retractor according to claim 1, wherein a restriction angle of the self-weight rotation of the seat belt retractor by the cutout portion is set to a maximum of 13 degrees.