JP4233188B2 - Seat belt device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seat belt device that restrains the body of an occupant seated on a seat of an automobile or an aircraft, for example, in an emergency, and more particularly to a structure for obtaining good sliding contact between a webbing and a webbing guide.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a seat belt device for restraining a vehicle occupant or the like to a seat, there is a three-point seat belt device using continuous webbing (hereinafter referred to as “seat belt device”).
[0003]
Referring to FIG. 4, in the seat belt device 20, the webbing 21 is wound around one end of the webbing 21 so that it can be pulled out, and the other end is anchored to the lower part of the center pillar 23. 24 is locked through a through anchor 25 which is a webbing guide. The webbing 21 is engaged with a buckle 28 erected in the vicinity of the seat 27 in the vehicle body, with a sluting 26 disposed between the anchor plate 24 and the through anchor 25. As a result, the webbing 21 restrains the occupant (not shown) to the seat 27.
[0004]
The seat belt device 20 is provided with a through belt (not shown), a webbing guide at the outlet of the retractor, and the like as the webbing guide for guiding the webbing 21 in addition to the through anchor 25 and the sluting 26. Each of the webbing guides is provided with an elongated belt slot (webbing insertion gap), and the belt slot guides the inserted webbing 21 by sliding contact.
[0005]
[Problems to be solved by the invention]
By the way, in order to secure a good winding property of the webbing 21 and a good operational feeling when the webbing 21 is pulled out, it is necessary to keep the frictional resistance at the sliding contact portion between the belt slot and the webbing 21 as low as possible. is there. Therefore, the surface shape is smoothed by a coating resin, or surface treatment is performed by applying a low friction material as described in, for example, US Pat. No. 4,582,340.
[0006]
On the other hand, with a through anchor formed by molding a coating resin on the insert metal fitting, the friction resistance between the through anchor and webbing increases while the user repeatedly uses it depending on the molding material. There is a possibility of affecting the webbing winding property to the take-up device.
[0007]
In view of such circumstances, an object of the present invention is to provide a seat belt device capable of maintaining good sliding contact between a webbing guide and a webbing while having a simple structure.
[0008]
[Means for Solving the Problems]
The above object of the present invention is to provide webbing for restraining the occupant's body to the seat;
In a seat belt apparatus comprising a webbing guide that slides into contact with the webbing and guides the webbing,
The webbing guide is formed by molding a coating resin on an insert metal fitting, and a plated resin cover is fitted to a portion of the coating resin that comes into sliding contact with the webbing, and the resin cover This is achieved by providing a seat belt device characterized in that the surface is a webbing sliding contact surface.
[0009]
According to the above configuration of the present invention, the webbing guided in sliding contact with the webbing guide restrains the occupant's body to the seat. A plated resin cover is fitted to a portion of the webbing guide that is in sliding contact with the webbing, and the surface of the resin cover becomes the webbing sliding contact surface.
Therefore, since the adhesion of dust and the like is suppressed by plating the resin cover, the sliding contact with the webbing is less likely to deteriorate with time, and good sliding contact can be maintained.
[0010]
Here, specific materials for the resin cover include POM, nylon, ABS and the like. In any case, it is preferable to use a plating grade product. Representative examples of the plating grade products include Reny E40 polyamide resin manufactured by Mitsubishi Engineering Plastics Co., Ltd. and Toyobo Nylon-6 manufactured by Toyobo Co., Ltd. (T-777-02, T-779), which are nylon plating grade products.
As the type of plating treatment, hard chrome plating is preferable, but other plating treatments such as chrome plating, nickel plating, electroless plating, cobalt plating, tin cobalt plating, etc. may be used.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to illustrated embodiments.
1 is a front view showing a through anchor of a seat belt apparatus according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the through anchor of FIG. 1, and FIG. 3 is a through anchor of FIG. It is a perspective view which shows the resin-made covers.
[0012]
In the seat belt device, the webbing is wound at one end so that it can be pulled out by a retractor, and the other end is anchored to a lower part of the center pillar of the vehicle and a through anchor as a webbing guide. It is locked through. The webbing restrains the occupant to the seat by engaging the sluting disposed between the anchor plate and the through anchor with a buckle installed in the vicinity of the seat in the vehicle body.
[0013]
Referring to FIGS. 1 to 3, the through anchor 10 is configured by integrating a covering resin 13 by molding into an insert fitting 11 formed by processing a single metal plate 12 into a required shape. A resin cover 16 is fitted into a portion of the through anchor 10 that is in sliding contact with the webbing.
[0014]
That is, in the through anchor 10, the periphery of the opening 14 formed in the insert fitting 11 is covered with a coating resin 13 that is molded into a required shape. The through anchor 10 has a resin cover 16 fitted to a coating resin 13 around the lower edge portion of the opening 14, whereby a sliding contact surface 15 (hereinafter referred to as “webbing slide”) with the webbing is formed on the surface of the resin cover 16. Contact surface 15 ").
[0015]
A bolt insertion hole 12a for inserting a bolt or the like (not shown) for rotatably supporting the through anchor 10 on the center pillar is formed in the upper part of the insert fitting 11 in FIG.
The insert fitting 11 is formed into a required shape by punching a metal plate 12 such as a steel plate, for example, and ensures the load bearing performance of the through anchor 10. Examples of the material of the metal plate 12 include a carbon steel material (JIS SC material) having a predetermined plate thickness so as to withstand a predetermined load. Moreover, you may comprise so that it can endure a predetermined load by heat-processing this insert metal fitting 11. FIG.
[0016]
The covering resin 13 is molded around the opening 14 of the insert fitting 11 so as to have a required shape. The coating resin 13 is made of a resin having high mechanical strength. Specific examples of the coating resin 13 include polyamide resins such as polyamide 6, resins obtained by adding a reinforcing agent to polyacetal and polypropylene, or polycarbonate.
[0017]
The resin cover 16 is formed in a required shape close to a cylindrical shape, and has a notch 17 along the longitudinal direction. The resin cover 16 is inserted into the webbing insertion gap 18 of the through anchor 10 in which the coating resin 13 is molded, and is elastically deformed so as to expand the notch 17, while the lower edge of the opening 14. The both ends 16 a in the width direction are fitted into the mounting grooves 13 a formed in the coating resin 13 and fitted in the surrounding coating resin 13. The resin cover 16 is made of a plating grade product such as POM, nylon, ABS, and the surface is plated.
[0018]
That is, due to the plating treatment on the surface of the resin cover 16, adhesion of dust or the like to the surface is suppressed, and good sliding contact with the webbing as the webbing sliding contact surface 15 is maintained. Here, as representative examples of plating grade products, Reny E40 polyamide resin manufactured by Mitsubishi Engineering Plastics Co., Ltd., Toyobo Nylon-6 manufactured by Toyobo Co., Ltd. (plating grades T-777-02, T-779), and the like can be given. . Further, as the type of plating treatment, hard chrome plating is optimal, but any of chrome plating, nickel plating, electroless plating, cobalt plating, and tin cobalt plating may be used.
[0019]
For example, Japanese Patent Application No. 11-256260 previously filed by the present applicant discloses data that proves that the resin cover 16 having a plated surface can maintain good sliding contact with the webbing. Data can be used.
That is, the data disclosed in Japanese Patent Application No. 11-256260 proves that the plated metal surface can maintain good sliding contact with the webbing. This can also be achieved by replacing the surface with the surface of the resin cover 16.
[0020]
The operation of this embodiment will be described.
In the seat belt device, the webbing that restrains the occupant to the seat is inserted into the webbing insertion gap 18 of the through anchor 10 and is slidably contacted with the webbing sliding contact surface 15 of the resin cover 16, whereby the through anchor 10. Be guided to. The through anchor 10 slidably contacts the webbing with excellent slidability with the webbing slidable contact surface 15 on which the resin cover 16 is plated, and guides the webbing.
[0021]
As described above, according to the above embodiment, the surface of the resin cover 16 fitted to the coating resin 13 around the lower edge of the opening 14 is plated to form the webbing sliding contact surface 15. Further, it is possible to reliably suppress the adhesion of dust or the like to the webbing sliding contact surface 15.
Therefore, excellent sliding contact between the through anchor 10 and the webbing can be ensured, and good sliding contact with the webbing can be maintained over a long period of time.
[0022]
【The invention's effect】
As described above, according to the present invention, the webbing guide is formed by molding the coating resin on the insert metal fitting, and the plated resin cover is fitted to the portion of the coating resin that is in sliding contact with the webbing. The surface of the resin cover is the webbing sliding contact surface.
Therefore, since the adhesion of dust and the like is suppressed by plating the resin cover, the sliding contact with the webbing is less likely to deteriorate with time, and good sliding contact can be maintained.
[Brief description of the drawings]
FIG. 1 is a front view showing a through anchor of a seat belt device according to a first embodiment of the present invention.
2 is a cross-sectional view of the through anchor of FIG.
3 is a perspective view showing a resin cover of the through anchor of FIG. 1. FIG.
FIG. 4 is a perspective view showing a conventional seat belt device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Through anchor 11 Insert metal fitting 12 Metal plate 13 Cover resin 13a Mounting groove 14 Opening part 15 Webbing sliding contact surface 16 Resin cover 16a Both ends 17 Notch part 18 Webbing penetration gap

Claims (1)

Webbing that restrains the occupant's body to the seat;
In a seat belt apparatus comprising a webbing guide that slides into contact with the webbing and guides the webbing,
The webbing guide is formed by molding a coating resin on an insert metal fitting, and a plated resin cover is fitted to a portion of the coating resin that comes into sliding contact with the webbing, and the resin cover The surface of the seat belt device is a webbing sliding contact surface.

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