JP2584867Y2 - Through anchor for seat belt - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a seat belt through anchor provided with an elongated hole for changing the direction of a webbing for guiding the webbing to a predetermined position.

[0002]

2. Description of the Related Art Conventionally, as a seat belt device for holding a vehicle occupant or the like safely in a seat, there is a three-point seat belt device using continuous webbing.

In this type of seat belt device, as shown in FIG. 3, one end of a webbing 10 is locked by a retractor (winding device) 20, and the other end thereof passes through a through anchor 21 and a center pillar 22. Is fixed to an anchor plate 27 supported by bolts 23 at the lower end of
The occupant is restrained by the seat 26 by engaging a slut tongue 24 provided at an intermediate portion of the webbing between the anchor plate 27 and the through anchor 21 with a buckle 25 provided upright at a substantially central portion of the vehicle body.

As shown in FIG. 4, for example, the through anchor 21 has a through hole at the upper end through which the bolt 11 penetrates, and a slot forming a belt slot 18 through which the webbing 10 is inserted at the free end side. Metal plate 1 provided
The outer surface on the free end side of the metal plate 14 is covered with a resin coating 15 integrally molded. That is, by forming the lower edge side sliding surface 17 of the belt slot 18 through which the webbing 10 is inserted with the resin coating 15, the webbing 10 slides smoothly, and the through anchor is pulled out when the webbing is pulled out and when the webbing is wound up. The sliding resistance of the webbing 10 at 21 is reduced.

[0005] The through anchor 21 is pivotally supported by the center pillar 22 by the bolt 11.

[0006]

However, since the through anchor 21 must securely support the webbing tension to the vehicle body via the metal plate 14 in the event of a vehicle emergency, the through-anchor 21 is made of resin on the lower edge side sliding surface 17. A high load acts on the coating 15. The resin coating 15 covers the edge 16 of the metal plate 14 on the lower edge side of the belt slot 18, thereby increasing the folding angle of the webbing 10 at the webbing folded portion, and thereby increasing the edge of the webbing 10 with the metal plate 14. Since it is necessary to prevent hitting, it is necessary to use a resin having sufficient mechanical strength so as not to be deformed when a load is applied, as a synthetic resin used for such a resin coating.

However, resins having high mechanical strength generally do not have good slidability, and resins having low friction coefficient and good slidability have low strength. I was

[0008] For this reason, conventionally, the slidability of the webbing 10 cannot be said to be good, and there has been a problem that the winding property when winding the webbing and the operational feeling when pulling out the webbing are not good.

That is, an object of the present invention is to solve the above-mentioned problems. By applying a resin coating having good slidability of the webbing and high mechanical strength, the winding property at the time of winding the webbing and the webbing pull-out are provided. An object of the present invention is to provide a good seat belt through anchor with improved operational feeling at the time.

[0010]

SUMMARY OF THE INVENTION The object of the present invention is to
Webbing to guide webbing into place
A long hole that changes the direction is provided, and it is swingably fixed to the vehicle body.
Anchor for seatbelt with broken metal plate
Wherein at least the lower edge of the slotAnd both sides
Is molded in one piece with resin with high mechanical strength.
The lower layer with a resin having a low coefficient of friction
Coating consisting of an upper layer integrally molded to cover
Seat bell covered with resin
This is achieved by a through anchor for

As the resin having a high mechanical strength as described above, it is preferable to use a polyamide-based resin, a polyacetal or a resin obtained by adding a reinforcing material to polypropylene, a polycarbonate or the like, and a resin having a small friction coefficient and good slidability. Preferred are polyolefin resins such as polyethylene and polypropylene, and fluororesins.

[0012]

[Function] The load due to the webbing tension is applied to the lower edge of the slot.
And when acting on both side edges, the lower layer formed of resin having strong mechanical strength supports this load without deformation, and prevents the edge of the webbing from hitting the metal plate with the metal plate at the webbing folded portion. So
For the upper layer that slides on the webbing, a resin having low strength but good slidability can be used.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the accompanying drawings. The through anchor 1 for a seat belt shown in FIGS. 1 and 2 is provided with a through hole 7 through which a bolt 11 penetrates at an upper end, and a slot which forms a belt slot 5 through which a webbing 10 is inserted at a free end side. The outer surface of the free end side of the metal plate 2 is covered with a resin coating 8 integrally molded. The resin coating 8 has a two-layer structure including a lower layer 3 made of a resin having high mechanical strength, and an upper layer 4 made of a resin which covers the lower layer 3 and has a small frictional resistance and good slidability.

First, as shown in the right half of FIG. 1, at least the edge 9 of the metal plate 2 on the lower edge side of the belt slot 5 does not come into contact with the webbing 10, so that a resin having high mechanical strength is used. Are integrally molded to form the lower layer 3. The lower layer 3 covers the edge 9 of the metal plate 2 on which the webbing tension is applied with a resin having a high mechanical strength, thereby increasing the folding angle of the webbing 10 at the webbing folded portion to form the webbing 10 with the edge 9. Edge contact is prevented.

Next, as shown in the left half of FIG.
On the free end side of the metal plate 2 including the peripheral edge of the belt slot 5, a resin having low frictional resistance and good slidability is integrally molded to cover the lower layer 3 and the upper layer 4 is formed.
Is configured. The upper layer 4 comprises a lower edge 6 of a belt slot 5.
In addition , the sliding resistance of the webbing 10 at the side edges is reduced, the sliding of the webbing 10 is smooth, and the edge of the metal plate 2 on the upper edge side of the belt slot 5 is not in contact with the webbing 10. These are coated.

As shown in FIG. 2, the seat belt through anchor 1 is pivotally supported by a bolt 11 that penetrates a through hole 7 provided at the upper end. Then, the through anchor 1 is connected to the retractor 20 at one end of the webbing 10 and the other end passes through the through anchor 1 to the lower end of the center pillar 22 in the same manner as in the prior art.
The slutung 24 disposed at a webbing intermediate portion between the anchor plate 27 and the through anchor 21 is engaged with a buckle 25 erected substantially at the center of the vehicle body. When used in a three-point seat belt device in which an occupant is restrained by a seat by joining together, as shown in FIG. After that, the webbing 10b becomes the outlet webbing 10b.

That is, the webbing 10 is connected to the belt slot 5
Folded by the lower edge 6, the lower edge 6 and both side edges
Slides longitudinally along the part but lower edge 6 and two sides
Since the edge portion is covered with the upper layer 4 made of a resin having good slidability such as a polyolefin resin such as polyethylene and polypropylene, or a fluororesin, the belt slot 5 is formed.
The operability at the time of pulling out the webbing and at the time of winding the webbing can be improved by smoothing the sliding at the webbing folded portion.

Further, when a tension is applied to the webbing 10 in a vehicle emergency or the like and a load is applied to the lower edge 6 of the belt slot 5, a resin such as polyamide, polyacetal or polypropylene containing a reinforcing material, polycarbonate or the like is used. The lower layer 3 made of a resin having high mechanical strength supports the load acting on the lower edge portion 6 without deforming it, and prevents the edge of the webbing 10 from coming into contact with the metal plate 2 at the webbing folded portion. .

Therefore, the resin coating 8 having good slidability of the webbing 10 and sufficient mechanical strength is applied, so that the webbing for winding the webbing and the operability at the time of pulling out the webbing have a good operation feeling. Could be an anchor.

Incidentally, the through anchor for the seat belt of the present invention is not limited to the above-mentioned embodiment, and it is needless to say that various shapes can be adopted. For example, in the seat belt through anchor in the above embodiment, the entire free end side surface of the metal plate is coated with resin. However, according to the gist of the present invention, only the peripheral portion of the elongated hole is coated with resin. It is also applicable to anchors.

Further, the through anchor for a seat belt of the present invention is not limited to the one provided on the center pillar as in the above-described embodiment, and is not limited to the location for guiding the webbing wound by the retractor. Of course.

[0022]

According to the seat belt through anchor of the present invention, when the load due to the webbing tension acts on the lower edge and both side edges of the belt slot, it is formed of a resin having strong mechanical strength. The lower layer supports this load without deformation and prevents the webbing from hitting the edge of the webbing with the metal plate at the folded back portion of the webbing. Good resin can be used.

Therefore, it is possible to provide a good seat belt through anchor with improved winding property when winding up the webbing and operation feeling when pulling out the webbing.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of a seat belt through anchor according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of the seat belt through anchor shown in FIG. 1;

FIG. 3 is an explanatory diagram illustrating a configuration of a three-point seat belt device.

FIG. 4 is a longitudinal sectional view of a conventional through anchor for a seat belt.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Through anchor for seat belt 2 Metal plate 3 Lower layer 4 Upper layer 5 Belt slot 6 Lower edge 7 Through hole 8 Resin coating 9 Edge 10 Webbing 11 Bolt 14 Metal plate 15 Resin coating 16 Edge 17 Lower edge side sliding surface 18 Belt Slot 20 Retractor 21 Through anchor 22 Center pillar 23 Bolt 24 Slutung 25 Buckle 26 Seat 27 Anchor plate

Claims (1)

(57) [Scope of request for utility model registration] 1. A seat belt through anchor having a metal plate fixed to a vehicle body and provided with a slot for changing the direction of the webbing for guiding the webbing to a predetermined position. The lower edge and both side edges of the long hole are formed of a lower layer integrally molded with a resin having high mechanical strength, and an upper layer integrally molded so as to cover the lower layer with a resin having a small coefficient of friction. A through anchor for a seat belt, which is covered with a resin.