JP2001171482A - Seat belt device with through anchor, and method of manufacturing through anchor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate manufacture and-reduce cost without being restricted by an obtained shape while securing an excellent webbing winding property and durability. SOLUTION: A metal plate 15 is inserted in a webbing insert opening 12 of an insert fitting 11 along a webbing insert-through direction, and protruding parts 21 protrusively provided at jigs 20 are fittingly inserted in guide holes 18 respectively provided at both end parts 17 along the webbing insert-through direction of the metal plate 15. In this state, both end parts 17 of the metal plate 15 are pressed toward fit-in grooves 13a of a coating resin 13 by the jigs 20. The metal plate 15 is thereby inserted in the webbing insert-through opening 12 along the outer surface of the coating resin 13 around a lower edge part 11a, and both end parts 17 of the metal plate 15 are fitted into the respective fit-in grooves 13a of the coating resin 13 to fix the metal plate 15 to the outer surface of the coating resin 13. The outer surface of the metal plate 15 thereby constitutes a webbing sliding contact surface 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat belt device having a through anchor having a webbing sliding surface made of a metal surface and a method of manufacturing the through anchor.
Specifically, it is for facilitating manufacture.

[0002]

2. Description of the Related Art Conventionally, as a through anchor having a webbing sliding contact surface formed of a metal surface, a webbing insertion hole, a webbing sliding contact surface, and a bolt mounting hole are formed in a single metal plate by press working. There is something.

For example, in US Pat. No. 4,618,165, as shown in FIG. 19, bolting is performed as a deflector 30 (through anchor 30) formed by a single press working. A substrate 32 in which a hole 31 is formed is surrounded by a fitting frame 33, and a webbing insertion hole 34 and a webbing sliding contact surface 35 are formed below the fitting frame 33.

[0004]

In the above-described conventional through anchor 30, since the webbing sliding contact surface 35 is formed of a metal surface, the friction with the webbing can be suppressed to a small value, and the webbing can be wound well. Properties and durability can be obtained.

[0005] However, the through anchor 30 is
There is a problem that the pressing process is complicated and the cost is high, and the obtained shape is restricted. Further, in view of suitability for attachment to a vehicle body, it is necessary to cover at least a part of the outer surface of the through anchor 30 with a cover or the like made of a resin molded product, which has a problem that the cost increases.

SUMMARY OF THE INVENTION The present invention provides a through-anchor which can obtain a good winding property and durability of a webbing, but can be manufactured easily and reduced in cost without being restricted by the shape to be obtained. It is an object of the present invention to provide a seat belt device provided with the same and a method of manufacturing a through anchor thereof.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a seat belt apparatus having a through anchor having a webbing sliding contact surface made of a metal surface. A coating resin formed with a pair of fitting grooves and covering the periphery of the webbing insertion opening of the insert fitting; and a webbing insertion opening inserted into the webbing insertion opening of the insert fitting along the webbing insertion direction. Along with the outer surface shape of the coating resin around the lower edge portion, both ends along the webbing insertion direction are respectively fitted into the respective fitting grooves of the coating resin, thereby being fixed to the outer surface of the coating resin. The present invention is achieved by a seat belt device provided with a through anchor, characterized in that the seat belt device includes a metal plate.

[0008] In the through anchor according to the present invention, the metal plate is inserted into the webbing insertion opening of the insert fitting along the webbing insertion direction, and conforms to the outer shape of the coating resin around the lower edge of the webbing insertion opening. At the same time, both ends along the webbing insertion direction are fitted into the respective fitting grooves of the coating resin, and are fixed to the outer surface of the coating resin. Therefore, the webbing sliding contact surface is constituted by the outer surface of the metal plate.

[0009] In the above structure, each fitting groove of the coating resin is formed as an inwardly extending space, and each of the metal plates is provided at a tip of both ends along a webbing insertion direction in a direction substantially orthogonal to the webbing insertion direction. It is preferable to provide a claw portion formed along the shape of a saw blade. According to this configuration, both ends along the webbing insertion direction of the metal plate do not fall out of the respective fitting grooves of the coating resin, and when fitted, in a direction substantially orthogonal to the webbing insertion direction. The claw portions formed like saw blades along the edge bite into the coating resin. Therefore, the metal plate is securely fixed to the outer surface of the coating resin.

[0010] Preferably, the through anchor of the seat belt device is manufactured by the following manufacturing method. In the method of manufacturing a through anchor having a webbing sliding contact surface made of a metal surface, while surrounding the webbing insertion opening provided in the insert fitting with a coating resin,
A pair of fitting grooves are formed on the outer surface of the coating resin, and then a metal plate is inserted into the webbing insertion opening of the insert fitting along the webbing insertion direction, and the lower edge of the webbing insertion opening is formed. Along the outer surface shape of the coating resin around the portion, furthermore, both ends along the webbing insertion direction of the metal plate are fitted into respective fitting grooves of the coating resin, and the metal plate is fitted on the outer surface of the coating resin. A method for manufacturing a through anchor, comprising fixing the through anchor.

In the method of manufacturing a through anchor according to the present invention, first, the periphery of the webbing insertion opening provided in the insert fitting is covered with a coating resin.
A pair of fitting grooves are formed on the outer surface of the coating resin. Next, the metal plate is inserted into the webbing insertion opening of the insert fitting along the webbing insertion direction, and conforms to the outer shape of the coating resin around the lower edge of the webbing insertion opening. Further, both ends of the metal plate along the webbing insertion direction are fitted into respective fitting grooves of the coating resin, and the metal plate is fixed to the outer surface of the coating resin. Thereby, the webbing sliding contact surface is formed by the outer surface of the metal plate.

In the above-described manufacturing method, the projections provided on the jig are fitted into the guide holes provided at both ends of the metal plate along the webbing insertion direction, and the metal plate is placed in this state. By pressing both end portions toward the fitting groove of the coating resin by the jig, the metal plate is made to conform to the outer surface shape of the coating resin around the lower edge portion of the webbing insertion opening, and the metal plate is pressed. It is preferable to fit both ends along the webbing insertion direction into the respective fitting grooves of the coating resin. The reason for this is that by using a jig, the metal plate can be more easily fixed to the outer surface of the coating resin while preventing the metal plate from being displaced.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. FIG. 1 is a front view showing a through anchor 10 according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view of the through anchor 10 in FIG. FIG.
FIG. 4 is a perspective view showing one end of a metal plate in a webbing insertion direction and a jig, and FIG. 4 is a cross-sectional view of FIG.

In these figures, a through anchor 10
Is formed by integrally molding a coating resin 13 with an insert fitting 11 formed by processing a single metal plate into a required shape. A portion of the through anchor 10 that comes into sliding contact with a webbing (not shown) is formed of a metal surface to which a metal plate 15 having a required shape is fixed.

That is, the through anchor 10 is covered with a coating resin 13 molded around the webbing insertion opening 12 formed in the insert fitting 11 into a sectional shape shown in FIG. A metal plate 1 is provided on the outer surface of the coating resin 13 around the lower edge 11a of the webbing insertion opening 12.
5 is fixed, and the outer surface of the metal plate 15 allows the sliding surface 14 to be in contact with the webbing (hereinafter referred to as the “webbing sliding surface 14”).
That. ) Is configured.

A bolt insertion hole 16 is formed in the upper part of the insert fitting 11 in FIG. In the bolt fitting hole 16,
A bolt or the like (not shown) for rotatably supporting the through anchor 10 on a center pillar (not shown) is inserted.

The insert metal fitting 11 is formed into a required shape by, for example, punching a steel plate or the like, thereby ensuring the load-bearing performance of the through anchor 10. Insert fitting 1
Examples of the material 1 include a carbon steel material (JIS SC material) having a predetermined thickness so as to withstand a predetermined load. Further, an insert fitting subjected to a heat treatment may be used.

The coating resin 13 forms a predetermined gap for inserting the webbing between the webbing sliding contact surface 14 in the webbing insertion opening 12 of the insert fitting 11.

Lower edge 11a of webbing insertion opening 12
A pair of fitting grooves 13a each formed of an inwardly extending space are respectively provided at predetermined positions on both left and right sides in FIG. 2 on the outer surface of the surrounding coating resin 13 to forcibly release the molding of the coating resin 13 (forcibly removing). Is formed along with. Each of the fitting grooves 13a is fitted with both ends 17 along the webbing insertion direction of the metal plate 15 (the direction perpendicular to the paper surface of FIG. 1), and secures the metal plate 15 to the coating resin 13. And

The coating resin 13 is preferably made of a resin having high mechanical strength. Specific examples of the coating resin 13 include a polyamide-based resin such as polyamide 6, a resin obtained by adding a reinforcing agent to polyacetal and polypropylene, and a polycarbonate.

Metal plate 1 constituting webbing sliding contact surface 14
In 5, both end portions 17 along the webbing insertion direction are each processed in advance into a curved shape that matches the cross-sectional shape of the fitting groove 13 a of the coating resin 13. The metal plate 15 is inserted into the webbing insertion opening 12 of the insert fitting 11 along the webbing insertion direction, and both ends 17 along the webbing insertion direction are pressed by the jigs 20 respectively. As a result, the metal plate 15 is deformed along the outer surface of the coating resin 13 around the lower edge 11a of the webbing insertion opening 12 and both end portions 17 along the webbing insertion direction are fitted with the respective fittings of the coating resin 13. The fitting groove 13a is fitted.

Guide holes 18 are provided at both ends 17 of the metal plate 15 along the webbing insertion direction at predetermined intervals in the width direction of the metal plate 15 (horizontal direction in FIG. 1). ) Are provided. When the metal plate 15 is pressed by the jig 20, a projection 21 projecting from the jig 20 is fitted into each guide hole 18. The fitting of the protrusion 21 of the jig 20 into each guide hole 18 prevents the metal plate 15 from being displaced in the width direction due to the pressing by the jig 20.

Claws 19 are provided at the ends of both ends 17 of the metal plate 15 along the webbing insertion direction. Each claw portion 19 is formed in a saw blade shape along the width direction of the metal plate 15.
5 is pressed into the coating resin 13 and the coating resin 1
The fixing of the metal plate 15 to 3 is ensured.

Next, the operation of the first embodiment will be described. The through anchor 10 guides the webbing of a seat belt device (not shown) that restrains the occupant to the seat by being inserted through the webbing insertion opening 12 of the insert fitting 11 and slidingly contacting the webbing sliding contact surface 14. . The through anchor 10 slides and guides the webbing with excellent sliding properties between the webbing sliding contact surface 14 formed of the outer surface (metal surface) of the metal plate 15.

Hereinafter, a method of manufacturing the through anchor 10 will be described. First, the periphery of the webbing insertion opening 12 provided in the insert fitting 11 is covered with a coating resin 13 in a required shape shown in FIG. 2, and the coating resin 13 around the lower edge 11 a of the webbing insertion opening 12 is formed. At a predetermined position on the outer surface, a pair of fitting grooves 13a are formed in a required shape along with the forced release during the molding of the coating resin 13.

Next, both ends 1 along the webbing insertion direction
7 is inserted into the webbing insertion opening 12 of the insert fitting 11 along the webbing insertion direction, with the metal plate 15 formed into a shape corresponding to each fitting groove 13 a of the coating resin 13. Further, the protrusions 21 of the jig 20 are inserted into the guide holes 18 provided at the both ends 17 of the metal plate 15.
Is inserted.

In this state, the both ends 17 of the metal plate 15 are
Are pressed by the jig 20 into the respective fitting grooves of the coating resin 13. As a result, the metal plate 15 is moved to cover the resin 1 around the lower edge 11 a of the webbing insertion opening 12.
3 along with the outer surface of the metal plate 15 and the two ends 17 of the metal plate 15
a. At this time, since each of the fitting grooves 13a is formed as an inwardly expanding space, it is difficult for the both ends 17 to come off.
Each of the claws 19 provided at the end of the both ends 17 of the metal plate 15 bites into the coating resin 13 as the jig 20 presses the metal plate 15. Thereby, the metal plate 15 is securely fixed to the outer surface of the coating resin 13, and the outer surface of the metal plate 15 forms the webbing sliding contact surface 14.

As described above, according to the first embodiment, the metal plate 15 having the required shape is inserted into the webbing insertion opening 12 of the insert fitting 11 along the webbing insertion direction, and the metal plate 15 is inserted in the webbing insertion direction. The jig 2 is inserted into guide holes 18 provided at both ends 17 along
The projection 21 protruding from the position 0 is fitted. In this state,
The metal plate 15 is pressed around the lower edge 11a of the webbing insertion opening 12 by pressing the both ends 17 of the metal plate 15 into the fitting grooves 13a of the coating resin 13 with the jig 20 respectively. The metal plate 15 is fixed to the outer surface of the coating resin 13 by fitting the both ends 17 of the metal plate 15 into the respective fitting grooves 13 a of the coating resin 13 along the outer surface of the resin 13. Thus, the outer surface of the metal plate 15 forms the webbing sliding contact surface 14.

Therefore, the present invention can be easily applied to a mold-type through anchor which is currently mainstream,
The webbing sliding contact surface 14 is made of a metal surface so that the webbing can be easily wound up and durable, but the obtained shape can be easily changed by changing the shape of the coating resin 13 and the metal plate 15. can do. Thereby, the manufacturing can be facilitated and the cost can be reduced without being restricted by the obtained shape.

Next, a second embodiment of the present invention will be described.
FIG. 5 shows a through anchor 11 according to a second embodiment of the present invention.
FIG. 6 is a front view showing the through anchor 1 shown in FIG.
FIG. 10 is a sectional view taken along arrow B of FIG.

As in the first embodiment, the through anchor 110 is formed by integrally molding a coating resin 113 with an insert fitting 111 formed by processing a single metal plate into a required shape. Further, a bolt fitting hole 116 is formed in the upper part of the insert fitting 111 in FIG. A portion of the through anchor 110 that comes into sliding contact with a webbing (not shown), that is, a webbing sliding contact surface 114 is formed of a metal surface to which a metal plate 115 having a required shape is fixed.

Further, the through anchor 110 of the second embodiment is used.
Is preferably formed of the same material as the through anchor 10 of the first embodiment, and the thickness of the metal plate 115 is preferably about 0.1 to 0.3 mm.

The difference between the through anchor 110 of the second embodiment and the through anchor 10 of the first embodiment is that the coating resin 1 around the lower edge 111a of the webbing insertion opening 112 is different.
13, a fitting groove 113a, 1
13b and projections 117a, 117 on the insert fitting side of the surface of the covering resin forming the fitting grooves 113a, 113b.
b. These projections 117a, 117b
Holds the metal plate 115 and prevents the metal plate 115 from coming off during the sliding of the webbing. In FIG.
17a and 117b are formed at appropriate intervals, but may be formed continuously without any intervals.

Hereinafter, referring to FIG. 7 to FIG.
A method for manufacturing the through anchor 110 according to the embodiment will be described. 7 to 10 show a through anchor 1 according to a second embodiment.
Lower edge 11 of webbing insertion opening 112 in 10
1a is shown, and the upper side of the through anchor 110 is omitted. First, the periphery of the webbing insertion opening 112 provided in the insert fitting 111 is covered with a coating resin 113 in a required shape shown in FIG.
Fitting grooves 113a, 113
b and projections 117a and 117b are formed on the surface of the coating resin forming the fitting grooves 113a and 113b on the insert metal fitting side by, for example, an injection molding method. During this processing, the fitting grooves 113a, 113b and the projections 117a, 117
In order to form b, for example, a slide core is used.

Next, as shown in FIG.
A metal plate 115 is wound around the surface of the
At least one end 1 with respect to the webbing sliding direction
19a and 119b, the coating resin 11 in which the inner surface of the metal plate 115 is located below the fitting grooves 113a and 113b.
3 is bent so as to be in contact with the surface (reference symbol R in FIG. 8).
Furthermore, by inserting the jig 120 from the lower side of the through anchor 110 to the upper side into the fitting grooves 113a and 113b,
The metal plate 115 is pressed into the fitting grooves 113a and 113b.

When the jig 120 is inserted, the metal plate 11
5 is pulled toward its ends 119a and 119b. At this time, the metal plate 115 is deformed according to the surface shape of the coating resin 113, and the back side of the webbing sliding surface 114 of the metal plate 115 as shown in FIG.
The end portions 119a, 119 of the metal plate 115
The 19b side is deformed according to the surface shape of the jig 120 and enters the fitting grooves 119a and 119b.

When the jig 120 is further inserted from the state of FIG. 9, as the metal plate 115 is pressed into the fitting grooves 113a and 113b, the metal plate 115
Deforms following the surface shape of No. 3. As a result, as shown in FIG. 10, the metal plate 115 is wound in close contact with the coating resin 113. The ends 119a and 119b of the metal plate 115 are locked and held by the projections 117a and 117b.

Then, the jig 120 is removed and the state shown in FIG. 6 is reached, and the mounting of the metal plate 115 is completed.

According to the manufacturing method described above, since the metal plate 115 is fixed in close contact with the coating resin 113, even if a large load is applied during sliding of the webbing, the metal plate 115 can be mounted. Detachment can be prevented.

Next, a third embodiment of the present invention will be described.
FIG. 11 shows a through anchor 2 according to a third embodiment of the present invention.
10 is a front view showing FIG. 10, and FIG. 12 is a cross-sectional view of the through anchor 210 of FIG.

The through anchor 210 of the third embodiment has the same form as the through anchor 110 of the second embodiment for the most part, and the same components are given the same reference numerals as those of the through anchor 110 of the second embodiment. is there. The through anchor 210 differs from the through anchor 110 of the second embodiment in the projections 217a and 217b and the method of forming the projections 217a and 217b.

Hereinafter, a method of manufacturing the through anchor 210 according to the third embodiment will be described with reference to FIGS. 13 to 16 show the lower edge 111a of the through anchor 110 of the third embodiment, and the upper side of the through anchor 210 is omitted. First, similarly to the second embodiment, the periphery of the webbing insertion opening 112 provided in the insert fitting 111 is covered with a covering resin 113 in a required shape shown in FIG.
3b is molded. However, at this time, the protrusions 217a, 217
17b is not formed.

Next, as shown in FIG.
3, a metal plate 115 is wound around the surface of the metal plate 115, and at least one end 119 of the metal plate 115 in the webbing sliding direction.
a and 119b are formed so as to be in contact with the surface of the coating resin 113 (reference numeral R in FIG. 14). Further, the jig 220 is inserted from the lower side of the through anchor 110 to the upper side with the fitting grooves 113a, 113a.
13b, the metal plate 115 is pressed into the fitting grooves 113a and 113b.

As the jig 220 is inserted, the metal plate 115 is deformed according to the surface shape of the coating resin 113 and the surface shape of the jig 120, as in the second embodiment, as shown in FIG. The webbing sliding surface 11 of the metal plate 115
4 is in close contact with the upper surface of the coating resin 113 in FIG. 15, and the ends 119 a and 119 b of the metal plate 115 are on the jig 22.
0 and the fitting grooves 119a, 11
9b. In this process, the jig 220
Is in contact with the insert fitting side of the surface of the covering resin forming the fitting grooves 113a and 113b.

When the jig 220 is further inserted from the state shown in FIG. 15, as the metal plate 115 is pressed into the fitting grooves 113a and 113b, the metal plate 115
Deforms following the surface shape of No. 13. As a result, FIG.
As shown in (1), the metal plate 115 is wound in close contact with the coating resin 113. At the same time, the jig 22
The claw 211 raises a part of the surface of the coating resin forming the fitting grooves 113a and 113b on the side of the insert metal fitting toward the inner side of the fitting grooves 113a and 113b, and raises the projection 21.
7a and 217b are formed. The ends 119a and 119b of the metal plate 115 are locked and held by the protrusions 217a and 217b.

Then, the jig 220 is removed and the state shown in FIG. 12 is reached, and the mounting of the metal plate 115 is completed.

According to the above manufacturing method, the same effects as those of the manufacturing method of the second embodiment can be obtained, and the metal plate 11
Since the projections 217a and 217b are formed at the same time as the step 5 is attached, the production is simplified and the production cost can be reduced as compared with the second embodiment.

Next, a fourth embodiment of the present invention will be described.
FIG. 17 shows a through anchor 3 according to a fourth embodiment of the present invention.
10 shows a sectional view. Through anchor 310 is lower edge 11
Except for 1a, the through anchors 10 of the first to third embodiments,
Since it is the same as 110 and 210, illustration is omitted. FIG. 17 shows the lower edge 1 of the through anchor 110 according to the fourth embodiment.
11a, the upper side of the through anchor 310 is omitted. In addition, about the same structure as 2nd and 3rd embodiment, the through anchors 110 and 2 of 2nd and 3rd embodiment are used.
The same reference numerals as in FIG.

As in the case of the second and third embodiments, the through anchor 310 is formed by covering the periphery of the webbing insertion opening 112 provided in the insert fitting 111 with a coating resin 113 as shown in FIG.
7 and a coating resin 113 around the lower edge 111a of the webbing insertion opening 112.
Fitting grooves 113a, 113
b is formed. Furthermore, the locking grooves 123a, 123b are inserted from the fitting grooves 113a, 113b toward the insert member 111.
b is formed.

The metal plate 115 is press-fitted into the fitting grooves 113a and 113b as in the second and third embodiments, whereby the metal plate 115 is completely wound around the coating resin 113 in close contact therewith. In the fitting grooves 113a and 113b, the stoppers 122a and 122b made of synthetic resin are fitted so as to sandwich the metal plate 115, respectively.
13b and the claw portions 125a,
5b are locking grooves 123 on both sides in the width direction of the metal plate 115.
a, 123b. Thereby, the metal plate 11
5 is firmly fixed to the coating resin 113, so that, for example, even when a large load is applied during sliding of the webbing, the metal plate 115 can be prevented from coming off. It is preferable that the stoppers 123a and 123b be stopped after the metal plate 115 is press-fitted.

In this embodiment, the stopper 12
3a and 123b are made of synthetic resin,
It may be formed from metal, and both may be integrally formed instead of separate bodies.

Next, a fifth embodiment of the present invention will be described.
FIG. 18 shows a through anchor 4 according to a fifth embodiment of the present invention.
10 shows a sectional view. Through anchor 410 is lower edge 11
Except for 1a, the through anchors 10 of the first to fourth embodiments,
Since they are the same as 110, 210, and 310, illustration is omitted. FIG. 18 shows the lower edge 111a of the through anchor 410 of the fourth embodiment, and the upper side of the through anchor 410 is omitted. In addition, about the same structure as 2nd-4th embodiment, the through anchor 11 of 2nd-4th embodiment is used.
The same reference numerals as 0, 210 and 310 are given.

As in the second to fourth embodiments, the through anchor 410 is formed by covering resin around a webbing insertion opening 112 provided in the insert fitting 111 with a coating resin 113 as shown in FIG.
7 and a coating resin 113 around the lower edge 111a of the webbing insertion opening 112.
Fitting grooves 113a, 113
b is formed.

As in the second to fourth embodiments, the metal plate 115 is press-fitted into the fitting grooves 113a and 113b, so that the metal plate 115 is wound tightly around the coating resin 113. In the fitting grooves 113a and 113b, resin rods 124a and 124b made of synthetic resin are press-fitted onto the metal plate 115, respectively. The metal plates 115 hold the resin bars 124a and 124b by bending the vicinity of the ends 119a and 119b of the metal plate 115 so that the surfaces thereof are in contact with the bottom surfaces of the resin bars 124a and 124b.

Accordingly, the metal plate 115 is closely attached to the coating resin 113 by the resin rods 124a and 124b, and the ends 119a and 119 of the metal plate 115 are attached.
Resin bars 124a and 124b are held near 119b. As a result, the metal plate 115
For example, even when a large load is applied when sliding the webbing, the metal plate 115 can be prevented from coming off. Also, the metal plate 11
5 is bent when the end portions 119a and 119b of FIG.
It is preferable that the vicinity of the end portions 119a and 119b of the metal plate 115 be pressed upward in the middle 8 to further press-fit the resin bars 124a and 124b.

In addition, similarly to the first embodiment, the above-described second to fifth embodiments can be easily applied to a mold type through anchor which is currently the mainstream, and the webbing sliding contact surface 114 is used. Can be easily changed by changing the shape of the coating resin 113 and the metal plate 115 while obtaining good winding properties and durability of the webbing. Thereby, the manufacturing can be facilitated and the cost can be reduced without being restricted by the obtained shape.

[0057]

As described above, in the through anchor of the seat belt device according to the present invention, the metal plate is inserted into the webbing insertion opening of the insert fitting along the webbing insertion direction, and the periphery of the lower edge of the webbing insertion opening is reduced. Is fixed to the outer surface of the coating resin by fitting each end along the outer shape of the coating resin into the fitting groove of the coating resin. Thereby, the webbing sliding contact surface is formed by the outer surface of the metal plate. Therefore, it is possible to obtain a good winding property and durability of the webbing, and to simplify the production without reducing the shape to be obtained, thereby reducing the cost.

Further, in the method of manufacturing a through anchor according to the present invention, the periphery of the webbing insertion opening provided in the insert fitting is covered with a coating resin, and a pair of fittings are provided at predetermined positions on the outer surface of the coating resin. A groove is formed, and then the metal plate is inserted into the webbing insertion opening of the insert fitting along the webbing insertion direction, and along the outer shape of the coating resin around the lower edge portion of the webbing insertion opening, Then, both ends of the metal plate along the webbing insertion direction are fitted into the respective fitting grooves of the coating resin, and the metal plate is fixed to the outer surface of the coating resin. Therefore, the production of the through anchor can be facilitated and the cost can be reduced without being restricted by the obtained shape, while obtaining good winding property and durability of the webbing.

[Brief description of the drawings]

FIG. 1 is a front view showing a through anchor according to a first embodiment of the present invention.

FIG. 2 is a sectional view of the through anchor shown in FIG.

FIG. 3 is a perspective view showing one end of a metal plate in a webbing insertion direction and a jig.

FIG. 4 is a sectional view of FIG. 3;

FIG. 5 is a front view showing a through anchor according to a second embodiment of the present invention.

FIG. 6 is a sectional view of the through anchor of FIG.

FIG. 7 is a cross-sectional view showing a process of manufacturing the through anchor of the second embodiment.

FIG. 8 is a cross-sectional view showing a process of manufacturing the through anchor of the second embodiment.

FIG. 9 is a cross-sectional view showing a process of manufacturing the through anchor of the second embodiment.

FIG. 10 is a cross-sectional view showing a process of manufacturing the through anchor of the second embodiment.

FIG. 11 is a front view showing a through anchor according to a third embodiment of the present invention.

FIG. 12 is a cross-sectional view of the through anchor shown in FIG.

FIG. 13 is a cross-sectional view showing a process of manufacturing the through anchor of the third embodiment.

FIG. 14 is a cross-sectional view showing a process of manufacturing the through anchor of the third embodiment.

FIG. 15 is a cross-sectional view showing a process of manufacturing the through anchor of the third embodiment.

FIG. 16 is a cross-sectional view showing a process of manufacturing the through anchor of the third embodiment.

FIG. 17 is a cross-sectional view illustrating a through anchor according to a fourth embodiment.

FIG. 18 is a sectional view showing a through anchor according to a fifth embodiment.

FIG. 19 is a sectional view showing an example of a conventional through anchor.

[Explanation of symbols]

10, 110, 210, 310, 410 Through anchor 11, 111 Insert fitting 11a, 111a Lower edge 12, 112 Webbing insertion opening 13, 113 Coating resin 13a, 113a Fitting groove 14, 114 Webbing sliding contact surface 15, 115 Metal plates 17, 117 Both ends along the webbing insertion direction of the metal plate 18 Guide holes 19 Claws 20, 120, 220 Jig 21 Projections 117a, 117b, 217a, 217b Projections 119a, 119b Metal plate ends 122a, 119b 122b Stoppers 123a, 123b Lock grooves 124a, 124b Resin rod

Claims (2)

[Claims] 1. A seat belt device provided with a through anchor having a webbing sliding contact surface made of a metal surface, comprising: an insert fitting having a webbing insertion opening; and a pair of fitting grooves formed on an outer surface. A coating resin that covers the periphery of the webbing insertion opening of the insert fitting; and an outer shape of the coating resin that is inserted into the webbing insertion opening of the insert fitting along the webbing insertion direction and that surrounds a lower edge of the webbing insertion opening. And both ends along the webbing insertion direction,
A metal plate fixed to an outer surface of the coating resin by being fitted into each of the fitting grooves of the coating resin. 2. A method for manufacturing a through anchor having a webbing sliding contact surface made of a metal surface, wherein a periphery of a webbing insertion opening provided in an insert fitting is coated with a coating resin, and an outer surface of the coating resin is provided. Next, a pair of fitting grooves are formed. Next, a metal plate is inserted into the webbing insertion opening of the insert fitting along the webbing insertion direction, and a coating resin around a lower edge portion of the webbing insertion opening is formed. In addition, both ends along the webbing insertion direction of the metal plate are fitted into the respective fitting grooves of the coating resin, and the metal plate is fixed to the outer surface of the coating resin. The method of manufacturing a through anchor.