JP4524518B2 - Webbing insertion member - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a webbing insertion member to be applied to the sheet Yorudaanka the seat belt device.
[0002]
[Prior art]
As is well known, the seat belt device is provided to protect an occupant by webbing in a high-speed moving body such as an automobile or an aircraft. For example, in a seat belt device for a front seat of an automobile, the webbing is hung on a shoulder anchor of a B pillar. This webbing is provided with a tongue, and this tongue is attached to the buckle.
[0003]
As such a tongue or shoulder anchor, a metal plate-like main body, and a part of this main body synthetic resin molded as required is known.
[0004]
A latch hole for a buckle is provided at the tip of the tongue, and a webbing insertion port is provided on the base end side.
[0005]
In the shoulder anchor, a bolt insertion port for attachment to the B pillar is provided at the upper portion, and a webbing insertion port is provided at the lower portion.
[0006]
In addition, in order to reduce the sliding resistance between the webbing and the edge of the insertion port, a slip piece made of synthetic resin such as nylon having good slidability may be provided at the insertion port. For example, the slip piece is insert-molded in a state where the slip piece is engaged with the webbing insertion port of the main body, and then the synthetic resin mold.
[0007]
[Problems to be solved by the invention]
Tongs and shoulder anchors equipped with such slip pieces need to have a larger insertion opening for the size (thickness) of the slip piece in order to secure the webbing insertion space. The anchor becomes larger. In addition, the cost of the slip piece is also increased.
[0008]
The slip piece may be omitted, and the insertion opening edge may be directly covered with a synthetic resin having good slidability such as nylon, but it is more expensive than polypropylene or the like.
[0009]
An object of the present invention is to provide a webbing insertion member having good sliding properties at an insertion port edge at low cost.
[0010]
[Means for Solving the Problems]
The webbing insertion member of the present invention is a webbing insertion member made of a metal plate having a webbing insertion port. The webbing insertion member is a shoulder anchor of a seat belt device, and the webbing of the metal plate slides. cross-sectional shape of the inner edge of the opening is Ri Na than the curved surface of the substantially arc-shaped cross-sectional shape that bulges from one plate surface of the metal plate, the plate surface and said edge portion of the metal plate is coated with a resin The resin is polypropylene, and the resin coating has substantially the same thickness over substantially the entire circumference of the curved surface of the edge .
[0011]
In such a webbing insertion member, the cross-sectional shape of the insertion port edge that slides with the webbing is a curved surface, and this edge bulges from the plate surface of the webbing insertion member, so the curvature radius of the curved surface is large. The sliding resistance of webbing is small .
[0012]
Moreover, the strength of the edge increases as the edge bulges. For this reason, the width from the insertion port to the outer peripheral edge of the webbing insertion member can be reduced, and as a result, the webbing insertion member can be reduced in size.
[0013]
In the present invention, the insertion opening edge webbing slides is that is tree fat coating. This tree fat is a polypropylene, Ru cheap der.
[0014]
In the present invention, the insertion opening edge webbing slides is bulged only one plate surface.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, reference examples and embodiments will be described with reference to the drawings. 1A is a perspective view of a tongue as a webbing insertion member according to a reference example , FIG. 1B is a cross-sectional view taken along line BB in FIG. 1A, and FIG. It is an enlarged view near the insertion port of b).
[0016]
The tongue 1 is made of a metal plate. A latch hole 2 for a buckle is provided on the distal end side, and an insertion port 3 for webbing (not shown) is provided on the proximal end side. This insertion port 3 extends in the width direction of the tongue 1 (direction perpendicular to the direction of insertion into the buckle). In this reference example , the entire edge portion of the insertion port 3 is bulged from both plate surfaces, and the cross-sectional shape of the edge portion is a curved surface. In the present invention, in order to reduce the sliding resistance of the c Ebingu, the curved surface is Ru arcuate cross-sectional shape der.
[0017]
The edge part which this cross-sectional shape consists of a curved surface is formed by press work like FIG.
[0018]
That is, first, as shown in FIG. 2A, a metal base plate 1 ′ having a hole 3 ′ is prepared, and as shown in FIG. 2B, the edge of the hole 3 ′ is pressed with a tool 4 to form a protrusion 3A. To do. Next, as shown in FIG. 2 (c), the concave portion 5a of the tool 5 is pressed to round the outer edge of the projection 3A to form a rounded projection 3B. Thereafter, as shown in FIG. 2 (d), the projection 3B includes a tool 6 having a convex portion 6a for rounding the inner corner edge of the projection 3B and a tool 7 having a concave portion 7a for receiving the edge portion. Squeeze from both sides. Thereby, the edge part 3 which the cross-sectional shape shown in FIG.1 (c) consists of a curved surface, especially a substantially arc-shaped curved surface is formed.
[0019]
Thus, the edge 3a bulges from both plate surfaces of the tongue, and the cross-sectional shape of the edge 3a (the cross-sectional shape in the direction orthogonal to the extending direction of the side edge of the edge 3a) matches the tongue 1 formed of a curved surface. Therefore, the radius of curvature of the curved surface is moderately large and the sliding resistance of the webbing is small. Further, since the slip piece is unnecessary, the size of the insertion port 3 can be small, and as a result, the size (particularly the width) of the tongue 1 can be small. Further, the edge portion 3a is bulged to increase the strength of the edge portion. Therefore, the width dimension between the insertion port 3 and the outer periphery of the tongue 1 can be small, and the tongue 1 can be miniaturized.
[0020]
In the present invention, a part held by a person like the tongue 1A according to the reference example of FIG. 3 may be covered with the resin 10 (for example, a resin mold). 3A is a perspective view of the tongue 1A according to this reference example , FIG. 3B is a cross-sectional view taken along line BB in FIG. 3A, and FIG. 3C is FIG. ) Is an enlarged view of the vicinity of the insertion port 3. In the reference example of FIG. 3, the resin 10 is provided so as to expose the edges 3a, in the present invention, as tongs 1B according to a reference example of FIG. 4, and covers the edge 3a. In the present invention, dendritic fat this is polypropylene for cost down. Polypropylene has a sliding resistance larger than that of nylon. However, since the cross-sectional shape of the edge 3a is a curved surface having a large curvature radius, the sliding resistance of the webbing is practically sufficiently small.
[0021]
Although the edge over the entire circumference of the reference example in the insertion opening 3 in FIGS. 1-4 are assumed sectional shape consisting of a curved surface that bulges on both plate surfaces, the tongue 1C according to a reference example of FIG. 5, the webbing only edges of the side which primarily slides Ru have as the cross-sectional shape. The tongue 1C has a cross-sectional shape composed of curved surfaces in which the edge 3a on the side far from the latch hole 2 among the edges in the longitudinal direction of the insertion port 3 bulges on both plate surfaces. Such a bulging cross-sectional shape portion is not provided at the edge on the side close to the latch hole 2. 5A is a perspective view of the tongue 1C according to this reference example , FIG. 5B is a sectional view taken along line BB in FIG. 5A, and FIG. 5C is FIG. ) Is an enlarged view of the vicinity of the insertion opening.
[0022]
In the reference example of FIG. 6, the tongue 1D is locations touched by a human hand by resin molding or the like is coated with a resin 10. 6A is a perspective view of the tongue 1D according to this reference example , FIG. 6B is a sectional view taken along line BB in FIG. 6A, and FIG. 6C is FIG. ) Is an enlarged view of the vicinity of the insertion opening.
[0023]
As shown in FIGS. 6B and 6C, in the tongue 1D, the edge of the insertion opening not forming the curved surface is covered with the resin 10, but the tongue 1E according to the reference example of FIG. Then, it resin-molds so that the whole edge part of the insertion port 3 may be exposed .
[0024]
Upper Symbol Reference Example relates to tongs both, but the present invention is Ru applies to shoulder anchor as in reference example of FIG.
[0025]
8A is a front view of a shoulder anchor according to this reference example , FIG. 8B is a cross-sectional view taken along line BB in FIG. 8A, and FIG. 8C is FIG. ) Is an enlarged view of the vicinity of the insertion opening.
[0026]
The shoulder anchor 11 is made of a metal plate. An upper portion of the shoulder anchor 11 is provided with a mounting hole 12 for the B pillar, and a lower portion thereof is provided with a webbing insertion port 13.
[0027]
The edge of this insertion port 13 has a cross-sectional shape consisting of a curved surface as a whole, like the edge of the insertion port 3 of the tongue 1 according to the reference example of FIG. However, it is good also as a cross-sectional shape which consists of a curved surface only in the side (lower edge in the case of a shoulder anchor) which slides with webbing like the tongue 1C which concerns on the reference example of FIG. Also in this shoulder anchor, if necessary, a resin mold may be applied similarly to the tongues 1A, 1B, 1D, and 1E according to the reference examples of FIGS. In the present invention, the resin is Ru provided so as also to cover the edges of the cross-sectional shape consisting of a curved surface.
[0028]
Reference Example In the edge bulges from both plate surfaces, but in the present invention, Ru der those bulges from only one plate surface as in the embodiment of FIG.
[0029]
【The invention's effect】
As described above, the webbing insertion member of the present invention has good webbing slidability and can be manufactured at low cost.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a tongue as a webbing insertion member according to a reference example .
FIG. 2 is a cross-sectional view showing the press working of the edge of the tongue of FIG.
FIG. 3 is a configuration diagram of a tongue according to another reference example .
FIG. 4 is a cross-sectional view of the vicinity of an insertion opening of a tongue according to another reference example .
FIG. 5 is a configuration diagram of a tong according to a different reference example .
FIG. 6 is a configuration diagram of a tongue according to a different reference example .
FIG. 7 is a cross-sectional view of the vicinity of an insertion hole of a tongue according to another reference example .
FIG. 8 is a configuration diagram of a shoulder anchor as a webbing insertion member according to a reference example .
9 is a fragmentary cross-sectional view showing the form of implementation.
[Explanation of symbols]
1, 1A, 1B, 1C, 1D, 1E Tong 2 Latch hole 3 Webbing insertion port 3a Edge 10 Resin 11 Shoulder anchor 12 Mounting hole 13 Webbing insertion port 13a Edge

Claims (1)

In a webbing insertion member made of a metal plate having an insertion port for webbing,
The webbing insertion member is a shoulder anchor of a seat belt device,
Of the metal plate, the sectional shape of the edge of the insertion opening of the webbing slides is Ri Na than the curved surface of the substantially arc-shaped cross-sectional shape that bulges from one plate surface of the metal plate,
The plate surface and the edge of the metal plate are resin-coated,
The resin is polypropylene;
The webbing insertion member , wherein the resin coating has a substantially equal thickness over substantially the entire circumference of the curved surface of the edge .

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