JP3251459B2 - Seat belt hanger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat belt (webbing belt) which is constructed so as to be able to be extended, for example, a three-point seat belt for an automobile, and which is configured to stop the extension in an emergency. The present invention relates to a seat belt suspender that slidably suspends a middle portion of the seat belt in a folded manner.

[0002]

2. Description of the Related Art In recent years, in order to ensure the safety of an occupant in the event of a collision, a two-point seat belt that holds only the waist and a three-point type that holds the occupant's chest in a crossing manner have been recently used in automobiles. Seat belts have been adopted.

FIG. 7 is a perspective view of the inside of the automobile 1 shown for explaining the structure of the three-point seat belt 70. As shown in FIG. Although the three-point seat belt is attached to all of the front seats and the rear seats of the automobile 1, for simplification of the description, an example in which the seat belt is provided only in the driver's seat 2 will be described.

[0004] The three-point seat belt 70 includes a first anchor 71 provided below the center pillar 3 and a second anchor 7 attached to the floor between the driver's seat 2 and the passenger's seat 4.
2 and a third anchor 73 provided above the center pillar 3. The three-point seat belt 70 has one end attached to the first anchor 71 and the other end folded back at the third anchor 73 to a retractor (not shown) built in the center pillar 3. It comprises a webbing belt (seat belt) 74 to be wound up and a fixed belt 75 having one end attached to the second anchor 72 and a buckle 77 at the other end. In the middle of the waving belt 74, a tongue portion 76 that locks to the buckle 77 is provided.

FIG. 8 is a front view showing a conventional seat belt hanger 78 attached to the third anchor 73. As shown in FIG. The seat belt hanger 78 has a base member 80 made of a steel plate (made of a metal plate) having a bolt insertion hole 81 and a long hole 82.
And a synthetic resin covering member 90 which covers the periphery of the long hole 82 of the base member 80 and forms a seat belt insertion hole 91 in the long hole 82 portion. The slot 82 is
Long edges 82a and 82b facing each other and short edges 8 connecting both ends of the long edges 82a and 82b in a curved shape.
2c and 82d. The long hole 82 composed of the long edges 82a and 82b and the short edges 82c and 82d has a shape punched substantially perpendicularly to the plate surface of the base member 80 over the entire circumference.

The seat belt insertion hole 91 is opened so as to correspond to each of the long edges 82a, 82b and the short edges 82c, 82d, and one portion along the long edge 82a is a waving belt. 74 are folded back sliding portions 91a.

[0007] In the seat belt hanger 78 constructed as described above, the cover member 90 is integrally formed with the base member 80 by so-called insert molding. That is, the base member 8 is placed in a mold for molding the covering member 90.
0 is inserted, the mold is closed, and the mold is filled with a resin, whereby a covering member 90 integrated with the base member 80 is formed.
Is molded.

[0008]

However, in the seat belt hanger 78, as shown in FIG. 8, the base member 80
There is a problem that resin easily leaks along the outer peripheral edge 83 of the above, and a burr 90a is easily generated at a boundary 83a between the outer peripheral edge 83 and the covering member 90.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to prevent a burr caused by a covering member at a boundary portion between the outer peripheral edge of a base member and the covering member. It is an object of the present invention to provide a seat belt suspender that can perform the following.

[0010]

In order to achieve the above object, the present invention is configured so that it can be extended,
A seat belt suspending device that slidably suspends a middle portion of a seat belt that is configured to stop feeding in an emergency, such that the middle portion of the seat belt is folded back, and has a long hole for inserting the seat belt. A base member made of a metal plate, and a covering member made of a synthetic resin that covers the periphery of the long hole of the base member, and an outer peripheral portion of the base member is provided at a boundary portion with the covering member. And a step portion set one step lower on the covering member side.

[0011]

According to the present invention, since a step portion which is set one step lower on the side of the covering member is provided at the boundary portion between the outer peripheral edge of the base member and the covering member, the base portion is inserted from the above-mentioned boundary portion during insert molding. It is possible to prevent the resin from leaking along the outer peripheral edge of the member. Therefore, it is possible to prevent the burr caused by the covering member at the boundary between the outer peripheral edge of the base member and the covering member.

In addition, since the resin can be prevented from leaking as described above, it is not necessary to set the mold clamping force of the mold to be strong in order to prevent the resin from leaking. Therefore, the durability of the mold can be improved.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. First, a first embodiment will be described with reference to FIG. However, elements common to those of the conventional example shown in FIG. 8 are denoted by the same reference numerals, and description thereof is omitted.

FIG. 1A is a perspective view showing the structure of the seat belt hanger 10 attached to the third anchor 73 described in FIG. 7, and FIG. 1B is a perspective view showing the seat belt hanger. 1
FIG. 1C is a front view showing a base member 20 of FIG.
FIG. 2 is a cross-sectional view of the seat belt suspender 10 taken along a line II in FIG.

The seat belt suspension 10 is shown in FIGS.
As shown in (c), the covering member 30 is molded (injection molded) on the base member 20. Base member 2
No. 0 is formed by stamping out a steel plate (metal plate) material having a thickness of about 3 mm and pressing it.
And a seat belt holding portion 20B.
The attachment portion 20A and the seat belt holding portion 20B are bent at a predetermined angle (about 30 degrees) around the bent portion L as shown in FIG. 1 (c). Then, as shown in FIG. 1 (b), the bolt insertion hole 2 is formed in the mounting portion 20A.
1 is opened, and the seat belt holding portion 20B has
A long hole 22 for inserting a waving belt (seat belt) 74 is provided.

The long holes 22 are straight long edges 22a and 22b opposed to each other, and a curved short edge 22 formed to connect both ends of the long edges 22a and 22b.
c, 22d. As shown in FIG. 1 (c), the long hole 22 formed by each of the long edges 22a and 22b and each of the short edges 22c and 22d has a shape punched almost at right angles to the plate surface of the base member 20. It has become.

The covering member 30 has a long hole 2 of the base member 20.
2 is formed by molding (injection molding) so as to cover the periphery of the seat 2, and a portion that opens to correspond to the long hole 22 is a seat belt insertion hole 31. In the seat belt insertion hole 31, a portion along the long edge portion 22a at a position away from the bolt insertion hole 31 is a folded sliding portion 31a that folds the waving belt 74 and slidably supports the waving belt 74. I have.

In addition, around the bolt insertion hole 21, FIG.
As shown in (a) to (c), protrusions T are formed so as to project at predetermined intervals. The projection T acts as a bolt stopper when the seat belt hanger 10 is attached to the third anchor 73 (see FIG. 7) of the center pillar 3 of the vehicle with a bolt (not shown). Demonstrate the effect of the washer. As a result, the seat belt hanger 1
When attaching 0, a washer, which is usually used, is not required, so that the number of parts can be reduced.

Further, the base member 20 has a structure shown in FIGS.
(b) As shown in FIG.
Is provided with a step portion 24 formed so that the portion on the side of the covering member 30 is one step lower. The step portion 24 is formed substantially at right angles to the outer peripheral edge portion 23 and at a height such that the surface of the covering member 30 and the surface of the outer peripheral edge portion 23 are substantially flush. I have. That is, the outer peripheral edge 23 of the base member 20 is in a state where the portion on the side of the covering member 30 is formed to be lower by the thickness of the covering member 30 by the step portion 24.

In the seat belt hanger 10 constructed as described above, the base member 20 is first inserted into a mold, and then the mold is closed. Then, a resin is injected and filled into a space corresponding to the covering member 30 in the mold. Thereby, the covering member 30 is in a state of being integrally formed with the base member 20. The cover member 30 is formed integrally with the base member 20 by so-called insert molding.

The outer peripheral edge 23 of the base member 20
Is provided with the step portion 24 set one step lower on the side of the covering member 30, so that at the time of insert molding, the boundary portion 23 a
, The resin can be prevented from leaking along the outer peripheral edge portion 23. Therefore, the base member 20 and the covering member 3
It is possible to prevent the burr due to the covering member 30 from being generated at the boundary portion 23a with zero.

Moreover, since the leakage of the resin can be prevented as described above, the leakage of the resin as described above has been prevented by setting a large clamping force in the related art. Does not need to be set large. Therefore, the durability of the mold can be improved.

Next, a second embodiment of the present invention will be described with reference to FIGS. However, the same reference numerals are given to the same components as the components shown in the first embodiment, and description thereof will be omitted. The second embodiment is different from the first embodiment in that the longitudinal end of the long hole 22 swells on one side and the other side of the base member 20 and a waving belt (seat belt). The point is that it is formed into a smooth curved surface along the direction in which it is folded back.

That is, the short edges 22c and 22d are
As shown in (a) and (b), the cross section is formed in an elliptical shape by the bulging portions 22e bulging on one surface and the other surface of the base member 20, respectively.

In this embodiment, each bulge 2
2e is the long edge 22 adjacent to the short edges 22c, 22d.
a, 22b are also formed continuously at both ends. That is, as shown in FIG. 4, each bulging portion 22 e is formed at an end of the elongated hole 22 where the waving belt 74 is concentrated when, for example, the waving belt 74 is suddenly pulled.

Each of the bulging portions 22e is formed by cold working, and a part of the base member 20 is bent toward one surface, and the bent portion is moved toward the other surface. In addition, it is formed by making it curved. Therefore, each bulging portion 22e is connected to the base member 2
The amount of swelling from 0 is large, and the strength is also excellent.

The seat belt hanger 10 constructed as described above is formed by insert molding similar to that of the first embodiment so that the base member 20 and the covering member 30 are integrated. Also, for example, when the waving belt 74 is suddenly pulled, as shown in FIG. 3, the waving belt 74 is shifted toward one short edge 22c (or the other short edge 22d), or as shown in FIG. As shown, one short edge 22c side (or the other short edge 22c)
In some cases, they may be concentrated on d). In this case, the force of the waving belt 74 acts intensively on one short edge portion 22c side.

However, the ends of the short edges 22c and 22d and the long edges 22a and 22b adjacent to the short edges 22c and 22d are bulged portions 22e.
Therefore, only a very small stress concentration occurs on the covering member 30 in contact with the short edges 22c, 22d and the like. Therefore, even if the force of the waving belt 74 is concentrated on, for example, the one short edge portion 22c side of the long hole 22, the force acting on the covering member 30 from the one short edge portion 22c side is small. Decentralized, never concentrated. Therefore, the strength of the covering member 30 can be improved without increasing the thickness and strength of the resin.

Further, the short edge portion 2 is formed by the bulging portion 22e.
Since the contact area between 2c, 22d, etc. and the covering member 30 increases, the surface pressure acting on the covering member 30 from the short edge portions 22c, 22d, etc. can be reduced. Therefore, even from this point, even when the force of the waving belt 74 is concentrated on, for example, the one short edge portion 22c, the force that the covering member 30 receives from the base member 20 can be reduced. . That is, the strength of the covering member 30 can be improved without increasing the thickness and strength of the resin.

Also, even if the force of the waving belt 74 is concentrated on, for example, the one short edge portion 22c and the covering member 30 is thereby damaged, the one short edge portion 22c
Are formed into a smooth curved surface along the folding direction of the waving belt 74 by the bulging portion 22e.
No damage due to contact with c. In addition, the same operation and effect as those of the first embodiment are obtained.

Further, in this embodiment, the bent portion L
As shown in FIGS. 2 to 4, the positions of the short edges 22 c and 2
The bulging portion 22e formed in 2d is located at an avoiding position. Therefore, when the base member 20 is bent at a predetermined angle around the bent portion L, the base member 20 can be bent with the same pressing force as that of the first embodiment. This is the same in the third and fourth embodiments described later.

Next, a third embodiment of the present invention will be described with reference to FIG. However, components common to those of the second embodiment shown in FIGS. 2 to 4 are denoted by the same reference numerals, and description thereof will be omitted. The third embodiment differs from the second embodiment in that a bulging portion 22e is provided over the entire circumference of the long hole 22.

That is, the long hole 22 has a long edge portion 22a,
A bulging portion 22e similar to that shown in FIG. 2B is formed over the entire periphery of the base member 22b and the short edge portions 22c and 22d.
0 is formed on one surface side and the other surface side.

In the seat belt hanger 10 constructed as described above, all the portions of the elongated holes 22 come into smooth contact with the covering members 30, and therefore all of the covering members 30 in contact with the elongated holes 22. The stress concentration can be alleviated in the portion. In addition, the swelling portion 22e can reduce the surface pressure in all portions where the long hole 22 and the covering member 30 are in contact. Therefore, slot 2
In all the portions of the covering member 30 along 2, the strength can be improved for the same reason as in the second embodiment. In addition, even if the covering member 30 is damaged, all parts of the long hole 22 are
Since the webbing belt 74 is formed into a smooth curved surface along the direction in which the webbing belt 4 is folded, it is possible to prevent the webbing belt 74 from hitting the long hole 22 and being damaged. Other, first
The same operation and effect as those of the embodiment and the second embodiment are obtained.

Next, a fourth embodiment of the present invention will be described with reference to FIG. However, components common to those of the second and third embodiments shown in FIGS. 2 to 5 are denoted by the same reference numerals, and description thereof will be omitted. This fourth embodiment is the second
The difference from the embodiment and the third embodiment is that the longitudinal end portion or the entire circumference of the long hole 22 bulges to one surface side of the base member 20 and the direction in which the waving belt (seat belt) 74 is folded back. Is formed in a smooth curved surface along the line.

That is, the short edges 22c, 22 of the long holes 22
A swelling portion 22e swelling only on one surface side of the base member 20 is formed on the entire periphery of the long edge portions 22a and 22b or the long hole 22 adjacent thereto. And
The portion having the swelling portion 22e is the waving belt 74.
It is formed so as to draw a smooth curved surface along the direction in which it is folded back. The bulging portion 22e is formed by cold working, and is formed by bending a part of the base member 20 to one surface side and adjusting the bent portion to a curved surface. Therefore, the swelling portion 22e has a large amount of swelling from the base member 20 and is excellent in strength.

The seat belt hanger 10 constructed as described above has the same operation and effects as the first to third embodiments.

In each of the above embodiments, the step portion 24 is used.
Is formed substantially at right angles to the outer peripheral portion 23. However, the step portion 24 may be formed so as to be inclined obliquely toward the covering member 30 side or may be formed so as to bite into the outer peripheral edge portion 23 obliquely. Good. However, in order to prevent the resin from leaking along the outer peripheral edge 23, the step should be formed substantially at right angles to the outer peripheral edge 23, or formed so as to bite into the outer peripheral edge 23 side. Is preferred.

In each of the above embodiments, the height of the step portion 24 is set so that the surface of the covering member 30 and the surface of the outer peripheral portion 23 are substantially flush with each other. In order to prevent leakage along the outer peripheral edge 23, the outer peripheral edge 2
It is preferable to set the height of the step portion 24 so that the surface of the step 3 is slightly higher than the surface of the covering member 30.

[0040]

According to the present invention, since the outer peripheral edge of the base member is provided with a step portion which is set one step lower on the side of the covering member at the boundary portion with the covering member, the above-described boundary during insert molding is provided. It is possible to prevent the resin from leaking from the portion. Therefore, it is possible to prevent burrs from being generated by the covering member at the boundary with the covering member along the outer peripheral edge of the base member.

Further, since the resin can be prevented from leaking as described above, it is not necessary to set the mold clamping force of the mold to be strong in order to prevent the resin from leaking. Therefore, the durability of the mold can be improved.

[Brief description of the drawings]

FIG. 1 is a view of a seat belt suspender shown as a first embodiment of the present invention, wherein (a) is a perspective view, (b) is a front view showing a base member, and (c) is (b) FIG. 2 is a cross-sectional view of the seat belt hanger at a position corresponding to line II of FIG.

FIGS. 2A and 2B are views of a seat belt suspender shown as a second embodiment of the present invention, wherein FIG. 2A is a front view showing a base member, and FIG. 2B is a view corresponding to line II-II in FIG. FIG. 3 is a cross-sectional view of the seat belt hanger at a position where the seat belt is hung.

FIG. 3 is a front view showing the operation and effect of the seat belt suspender.

FIG. 4 is a front view showing the operation and effect of the seat belt suspender.

FIG. 5 is a front view showing a base member, which is a view of a seat belt suspender shown as a third embodiment of the present invention.

FIG. 6 is a sectional view of a seat belt suspender shown as a fourth embodiment of the present invention.

FIG. 7 is a perspective view showing the overall configuration of a three-point seat belt.

FIG. 8 is a front view of a seat belt hanger shown as a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Seat belt hanger 20 Base member 22 Long hole 22c, 22d End part (short edge part) 23 Outer peripheral part 23a Boundary part 24 Step part 30 Covering member 31 Seat belt insertion hole 74 Seat belt (webbing belt)

Claims (1)

(57) [Claims] Claims (1)
A seat belt hanger that slidably hangs an intermediate portion of a seat belt configured to stop feeding in an emergency, such that the middle portion of the seat belt is folded back, and has a long hole for inserting the seat belt. A base member made of a metal plate, and a covering member made of a synthetic resin that covers the periphery of the long hole of the base member, wherein an outer peripheral portion of the base member has a boundary portion with the covering member. A seat belt hanger provided with a step portion set one step lower on the covering member side.