JP2021008232A - Through anchor and seat belt device - Google Patents

Abstract

To provide a through anchor and a seat belt device which can easily cope with through anchors having different specifications such as a pattern and a material of a piece.SOLUTION: A through anchor includes a metal plate 21, a coating resin part 30 coating the outer surface of the metal plate 21, a first piece 50 mounted on the coating resin part 30, and a second piece 60 mounted on the coating resin part 30 so as to cover the side edge part of an insertion hole rising part 34A. Engagement parts 53a and 53b engaged with an engaged part 39 of the coating resin part 30 are formed on the rear face of the first piece 50, and the second piece 60 has a projection part 64 that projects toward the first piece 50 from the side face of the first piece side and supports the rear face of the first piece 50. The coating resin part 30 includes a first projection part 38 guiding the rear face of the first piece 50 and a second projection part 42 guiding the recessed groove-like rear face of the second piece 60. A step surface 43 formed between the side edge part of the insertion hole rising part formed by the coating resin part 30 and the second projection part is inclined so as to approach the lower edge part toward a webbing insertion hole 31.SELECTED DRAWING: Figure 1

Description

The present invention relates to a through anchor and a seatbelt device that folds back and supports a webbing inserted in a vehicle seatbelt device.

Vehicle seats are equipped with seatbelt devices for occupant restraint that prevent occupants from jumping forward due to inertial force when a large deceleration acts on the vehicle, such as when the vehicle suddenly stops or collides. .. In the case of front seat belts, the webbing that restrains the occupant is pulled out upward from the retractor that winds up the webbing and inserted into the through anchor located above the center pillar (B pillar). The through anchor is provided with an elongated insertion hole through which the webbing is folded back toward the lower part of the vehicle.

An anchor plate is attached to the folded webbing tip and fixed to the lower part of the passenger compartment. A tongue plate that can slide on the webbing is arranged between the through anchor and the anchor plate by inserting the webbing. The occupant grasps the tongue plate, pulls out the webbing against the force of the retractor in the winding direction, attaches the tongue plate to the buckle located on the opposite side of the seat (center side of the vehicle), and restrains the body. ..

In addition, the through anchor may use a piece with low frictional resistance for the sliding portion of the webbing insertion hole with the webbing so as not to impair the functions of other parts when the occupant is restrained by the webbing. Furthermore, when the occupant behaves to move forward of the vehicle, such as in a collision, the front part of the webbing insertion hole also becomes a sliding part with the webbing, so the front part is also covered with a piece with low friction resistance. Is desirable.

Patent Documents 1 and 2 disclose a technique in which a piece having low frictional resistance is attached to a metal plate before resin molding, and the piece is integrally molded with a coating resin together with the plate. In particular, Patent Document 1 describes a through anchor having a rising portion at a portion closer to the front of the sliding portion and a large piece formed in a substantially L shape.

Japanese Unexamined Patent Publication No. 2014-205422 Japanese Unexamined Patent Publication No. 2014-108761

However, according to the prior art described in Patent Documents 1 and 2 in which the pieces are integrally molded with a coating resin after being attached to the plate, it is necessary to mold the product for each piece having a different pattern, and when the specifications are changed, the molding is started. There is the problem of having to start over. In particular, as shown in Patent Document 1, it is difficult to assemble the piece after molding the coating resin in the shape of a large (L-shaped) piece that can cover the front part of the sliding portion. There was room for improvement because there was no choice but to mold it integrally with the coating resin after attaching it to the plate.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a through anchor and a seatbelt device that can easily cope with pieces having different specifications such as patterns and materials. is there.

The above object of the present invention is achieved by the following configuration.
(1) A webbing insertion hole through which the webbing is inserted is provided, and the webbing insertion hole has a substantially linear elongated hole portion and a pair of insertion hole rising portions continuous from both ends of the elongated hole portion. A through anchor that supports the webbing by being folded back through the webbing insertion hole.
With a metal plate
A coating resin portion that covers the outer surface of the metal plate and
A first piece attached to the coating resin portion so as to cover the lower edge portion of the elongated hole portion, and
A second piece attached to the coating resin portion so as to cover a side edge portion continuous from the lower edge portion at one of the rising portions of the pair of insertion holes.
With
On the back surface of the first piece, an engaging portion that engages with the engaged portion of the coating resin portion is formed.
The second piece has a protrusion that projects from the side surface on the first piece side toward the first piece and supports the back surface of the first piece.
The coating resin portion is shorter than the longitudinal length of the first piece, and has a first ridge portion that guides the back surface of the first piece and a second ridge that guides the concave groove-shaped back surface of the second piece. With a department,
The stepped surface formed between the side edge portion of the insertion hole rising portion formed by the coating resin portion and the second ridge portion is inclined so as to approach the lower edge portion toward the webbing insertion hole. Through anchor that is doing.
(2) A seatbelt device provided with the through anchor according to (1).
The term "lower edge portion in the elongated hole portion" as used herein refers to the edge portion of both edge portions facing each other in the elongated hole portion in the floor direction of the vehicle when the through anchor is attached to the vehicle.

According to the through anchor and seat belt device of the present invention, by changing the first and second pieces and attaching them to the coating resin portion, it is possible to easily cope with through anchors having different specifications such as piece patterns and materials. it can.

It is a perspective view of the thru anchor which concerns on one Embodiment of this invention. (A) is a front view of the through anchor seen from the front of the metal plate, and (b) is a front view of the through anchor seen from the front of the webbing insertion hole. (A) is a perspective view of the main body shown in FIG. 1, (b) is a perspective view of the second piece, (c) is a perspective view of the first piece, and (d) is a perspective view of FIG. 3 (c). It is the A arrow view shown. It is a front view which looked at the main body part shown in FIG. 1 from the front of the coating resin part. (A) is a front view showing a state in which the second piece is attached to the main body portion, and (b) is an enlarged view of a portion surrounded by a circle B in FIG. 5 (a). It is a perspective view which shows the state which the 2nd piece is attached to the main body part.

Hereinafter, the through anchor according to the embodiment of the present invention will be described in detail with reference to the drawings. The through anchor 10 of the present embodiment is applied to a seatbelt device, and supports a webbing (not shown) which is attached to a center pillar of a vehicle and inserted into a webbing insertion hole 31 described later.

In the following, when the through anchor 10 is attached to the vehicle, the front and rear of the vehicle are in the front-rear direction or the longitudinal direction of the through anchor, and the inside and outside of the vehicle are in the front and back sides or the thickness direction of the through anchor, and the ceiling side. And the floor side will be described as the vertical direction.

As shown in FIGS. 1 and 2, the through anchor 10 mainly includes a main body portion 20, a first piece 50, and a second piece 60.

With reference to FIGS. 3 and 4, the main body portion 20 includes a metal plate 21 and a coating resin portion 30 that covers the outer surface of the metal plate 21. The metal plate 21 is, for example, a metal plate formed by punching, and a bolt hole 22 is formed in the upper portion thereof. The through anchor 10 is rotatably fixed to a wall in the vehicle interior by inserting a bolt (not shown) into the bolt hole 22.

The coating resin portion 30 is molded by using a synthetic resin material (for example, polyamide) to cover the surface of the metal plate 21 excluding the attachment portion to the vehicle (near the bolt hole 22), and is integrally formed with the metal plate 21. ing.

A substantially U-shaped through space 32 is formed in the lower portion of the coating resin portion 30, and the first piece mounting portion 35 and the second piece to which the first piece 50 is mounted are located at positions facing the through space 32. A second piece mounting portion 36 on which the 60 is mounted is formed. Therefore, by mounting the first piece 50 and the second piece 60 on the first piece mounting portion 35 and the second piece mounting portion 36, respectively, the coating resin portion 30, the first piece 50, and the second piece 60 A webbing insertion hole 31 through which the webbing is inserted is formed.

As shown in FIG. 1, the webbing insertion hole 31 is a pair of an elongated hole portion 33 extending substantially linearly in the front-rear direction and a pair extending from both ends of the elongated hole portion 33 in the front-rear direction and extending upward. It has an insertion hole rising portion 34 of the above. The insertion hole rising portion on the front side of the vehicle is shown as 34A, and the insertion hole rising portion on the rear side of the vehicle is shown as 34B.

As shown in FIG. 3, in the first piece mounting portion 35 and the second piece mounting portion 36, when the first piece 50 and the second piece 60 are mounted, the peripheral portions of the first piece 50 and the second piece 60 are formed. It is formed so as to be continuous with the outer surface of the coating resin portion 30 without a step so as to have a step and a boundary portion with the outer surface. The first piece mounting portion 35 is formed below and laterally from the lower end portion 37c of the side edge portion 37b of the insertion hole rising portion 34B, and is a first convex strip portion 38 extending in the longitudinal direction of the through anchor 10. And a plurality of concave grooves 39 which are engaged portions formed on the front side (the front side of the paper surface in FIG. 3) and the back side of the outer peripheral surface of the first convex portion 38. The plurality of recessed grooves 39 engage with the engaging portions 53a and 53b of the first piece 50, which will be described later. At the intermediate portion in the longitudinal direction of the first piece mounting portion 35, a substantially trapezoidal first piece guide portion 44 in which the outer surface of the coating resin portion 30 extends upward of the first convex portion 38 is located on the front side of the coating resin portion 30. Is formed in.

Further, on the upper surface of the rear end portion (right end in the drawing) of the first convex portion 38, an end protruding portion (another protruding portion) 40 that supports the back surface of the first piece 50 is formed so as to project upward. There is. The front end portion of the first ridge portion 38 forms a step portion 41 at the boundary between the second piece mounting portion 36 and the second ridge portion 42, which will be described later. The length of the first convex portion 38, that is, the length L1 from the rear end portion to the front end portion (step portion 41) of the first convex portion 38 is the front end surface 56a and the rear end surface of the first piece 50. It is shorter than the longitudinal length L2 between 56b (see FIG. 2C).

The second piece mounting portion 36 is formed by being curved between the side edge portion 37a of the coating resin portion 30 forming the insertion hole rising portion 34A and the step portion 41 of the first ridge portion 38. A second ridge portion 42 having an outer dimension smaller than that of the portion 38 is provided. The stepped surface 43 formed between the side edge portion 37a of the insertion hole rising portion 34A and the second convex portion 42 is inclined toward the webbing insertion hole 31 so as to approach the lower edge portion. The inclination angle is set to, for example, 10 °. When the second piece 60 is assembled to the second piece mounting portion 36, the second convex portion 42 is mounted on the second piece 60 with the upper portion of the second piece 60 mounted on the second piece mounting portion 36 in a wedge shape. Fits with the concave groove-shaped back surface 61 of the above (see FIG. 3B).

As shown in FIGS. 3C and 3D, the first piece 50 is formed in a columnar shape having a substantially inverted U-shaped cross section. On the back surface of the first piece 50, a pair of cantilevered engaging pieces 52a and 52b extending downward are provided so as to be divided along the longitudinal direction of the first piece 50. At the tip ends of the engaging pieces 52a and 52b, engaging portions 53a and 53b that engage with the plurality of concave grooves 39 of the first convex portion 38 are formed so as to face each other inward. Further, the peripheral edge portion of the first piece 50 is formed by notching a substantially trapezoidal guided portion 55 having a width narrowing upward in the central portion in the longitudinal direction thereof.

A plurality of linear convex portions 54 are formed on the outer peripheral surface of the first piece 50. These linear convex portions 54 are formed so that their longitudinal directions are inclined in the vehicle front-rear direction with respect to the circumferential direction on the outer peripheral surface of the first piece 50. These linear convex portions 54 reduce the frictional resistance between the webbing and the webbing insertion hole 31 when sliding contact with one surface of the webbing inserted through the webbing insertion hole 31.

The first piece 50 is formed of a synthetic resin material (for example, polyacetal) whose frictional resistance with the webbing is lower than that of the synthetic resin material of the coating resin portion 30.

As shown in FIG. 3B, the second piece 60 has a concave groove-shaped back surface 61 having a substantially U-shaped cross section guided by the second convex portion 42 of the second piece mounting portion 36, and is viewed from the front. It is curved in. The upper surface 62 of the second piece 60 has an inclination angle of approximately 10 °, which is the same as the step surface 43 of the second piece mounting portion 36, and is inclined in the same direction as the step surface 43. Further, a protruding portion 64 that projects toward the first piece 50 and supports the back surface of the first piece 50 is formed on the side surface 63 of the second piece 60 on the first piece side. The height of the protruding portion 64 is substantially the same as the height of the end protruding portion 40 of the coating resin portion 30 when the second piece 60 is attached to the second piece mounting portion 36. In the present embodiment, the protruding portion 64 is formed in a semicircular shape in a side view so that the lower surface thereof abuts on the upper surface of the second convex portion 42 having a trapezoidal cross section.

Like the first piece 50, the second piece 60 is made of a synthetic resin material (for example, polyacetal) having a lower frictional resistance than the coating resin portion 30.

Therefore, when assembling the through anchor 10, first, as shown in FIGS. 5 and 6, the second piece 60 is assembled to the second piece mounting portion 36 of the coating resin portion 30. Specifically, the upper surface 62 of the second piece 60 is seconded by arranging the coating resin portion 30 in the vicinity of the insertion hole rising portion 34A in the through space 32 and then moving the coating resin portion 30 toward the second piece mounting portion 36. The back surface 61 of the second piece 60 having a substantially U-shaped cross section is fitted to the second convex portion 42 while being brought into contact with the stepped surface 43 of the piece mounting portion 36.

In a state where the second piece 60 is assembled to the second piece mounting portion 36, the upper surface of the protruding portion 64 of the second piece 60 has the same height as the upper surface of the end protruding portion 40. Further, as shown in FIG. 5B, the protruding portion 64 of the second piece 60 and the first convex portion 38 of the coating resin portion 30 face each other with a gap s in the longitudinal direction of the elongated hole portion 33. There is. As a result, even if the webbing insertion hole 31 has a narrow distance between the facing surfaces, the second piece 60 is movably arranged in the through space 32 of the coating resin portion 30, so that the second piece 60 is covered with the coating resin. It can be easily assembled to the portion 30.

Next, the first piece 50 is assembled to the first piece mounting portion 35. Specifically, the first piece 50 formed in a substantially inverted U shape in cross section is inserted into the first convex portion 38 from the back surface side of the through space 32 of the coating resin portion 30 so as to be rotated along the shape. To do. Further, by pressing the first piece 50 downward in the through space 32, the engaging piece 52a is elastically deformed, and the engaging portion 53a of the first piece 50 is formed on the front side and the back side of the first convex portion 38. It engages with a plurality of recessed grooves 39.

As a result, the substantially trapezoidal guided portion 55 of the first piece 50 is fitted with the first piece guide portion 44 of the first convex portion 38, and the position of the first piece 50 in the longitudinal direction is determined more reliably. .. Further, the back surface of the first piece 50 is supported by the end protruding portion 40 of the coating resin portion and the protruding portion 64 of the second piece 60. Further, the front end surface 56a of the first piece 50 comes into contact with the side surface 63 of the second piece 60.

In this way, the first piece 50 is firmly fixed to the coating resin portion 30 by engaging the engaging portions 53a and 53b with the plurality of concave grooves 39 of the first convex portion 38. Further, since the upper surface 62 of the second piece 60 is in contact with the stepped surface 43 of the coating resin portion 30 that inclines downward toward the webbing insertion hole 31, the coating resin is opposed to the upper portion of the second piece 60. Since the outer surface of the portion 30 is located closer to the insertion hole rising portion 34A, the upper portion of the second piece 60 cannot be moved rearward, and the upper portion of the second piece 60 cannot be removed from the coating resin portion 30. Can not. Further, in order to remove the second piece 60 from the second piece mounting portion 36, the second piece 60 must be moved backward and downward. However, since the side surface 63 of the second piece 60 is in contact with the front end surface 56a of the first piece 50, the second piece 60 cannot move backward, so that the second piece 60 does not come off from the coating resin portion 30.

Therefore, since the first piece 50 and the second piece 60 are firmly engaged with the coating resin portion 30, even if a large force acts on the first and second pieces 50 and 60 due to friction with the webbing. , There is no risk of detaching from the coating resin portion 30.

When the occupant pulls out the webbing to the front side of the vehicle, the through anchor 10 is tilted substantially 45 ° toward the front side of the vehicle around the bolt hole 22 of the metal plate 21 and is pulled out from the webbing insertion hole 31 to the front side of the vehicle. At this time, in the webbing, the edge portion in the width direction (front side) is in sliding contact with the front side portion of the webbing insertion hole 31. However, since the second piece 60 forming the front side portion of the webbing insertion hole 31 is also made of a synthetic resin material having a small frictional resistance, the frictional force with the webbing is reduced and the pulling output of the webbing is reduced.

The webbing insertion hole 31 including the elongated hole portion 33 and the pair of insertion hole rising portions 34A and 34B of the present embodiment has a narrow distance between the facing edges, and the first piece 50 and the second piece 60 are integrated. In this state, it cannot be arranged in the through space 32 including the space where the first piece 50 and the second piece 60 are mounted. However, as in the present embodiment, by mounting the second piece 60 and the first piece 50 in this order on the coating resin portion 30, it can be assembled in the through space 32 forming the narrow webbing insertion hole 31.

Therefore, in the through anchor 10 of the present embodiment, after molding the coating resin portion 30 of the main body portion 20, the first piece 50 and the second piece 60 can be assembled, and the first piece 50 and / or the second piece can be assembled. Only the piece 60 can be changed, and it becomes possible to easily correspond to the through anchor 10 having different specifications such as a material and a groove pattern. As a result, the types of the main body 20 and its molding mold can be reduced by sharing the main body 20. In addition, the withdrawal performance of the webbing can be adjusted, expanding the range of support for various requirements.

The present invention is not limited to the above-described embodiment, and can be appropriately modified, improved, and the like.
For example, the outer diameter shapes of the first convex portion 38 and the second convex portion 42 may be appropriately changed according to the back surfaces of the first piece 50 and the second piece 60. However, it is preferable that the outer diameter shape of the second convex portion 42 is smaller than the outer diameter shape of the first convex portion 38 from the viewpoint of the mounting position of the protruding portion 64 of the second piece 60.

Further, when the coating resin portion 30 does not have the end protruding portion 40 on the first convex portion 38, the protruding portion 64 of the second piece 60 has the same height as the upper surface of the first convex portion 38. It may be designed.

As described above, the following matters are disclosed in this specification.
(1) A webbing insertion hole through which the webbing is inserted is provided, and the webbing passes through the webbing insertion hole and is folded back to support the webbing, and the webbing insertion hole has a substantially linear elongated hole portion. A through anchor having a pair of insertion hole rising portions continuous from both ends of the elongated hole portion.
With a metal plate
A coating resin portion that covers the outer surface of the metal plate and
A first piece attached to the coating resin portion so as to cover the lower edge portion of the elongated hole portion, and
A second piece attached to the coating resin portion so as to cover a side edge portion continuous from the lower edge portion at one of the rising portions of the pair of insertion holes.
With
On the back surface of the first piece, an engaging portion that engages with the engaged portion of the coating resin portion is formed.
The second piece has a protrusion that projects from the side surface on the first piece side toward the first piece and supports the back surface of the first piece.
The coating resin portion is shorter than the longitudinal length of the first piece, and has a first ridge portion that guides the back surface of the first piece and a second ridge that guides the concave groove-shaped back surface of the second piece. With a department,
The stepped surface formed between the side edge portion of the insertion hole rising portion formed by the coating resin portion and the second ridge portion is inclined so as to approach the lower edge portion toward the webbing insertion hole. The through anchor described in (1).
According to this configuration, the first and second pieces can be firmly assembled to the coating resin portion, and by changing the first and second pieces and attaching them to the coating resin portion, the coating resin portion can be shared. It is possible to manufacture a through anchor that is inexpensive and can easily respond to changes in specifications.
(2) When the second piece is assembled to the coating resin portion, a gap between the protruding portion of the second piece and the first convex portion of the coating resin portion in the longitudinal direction of the elongated hole portion. The through anchor according to (1), which is opposed to each other.
According to this configuration, the second piece can be easily assembled to the coating resin portion even in the webbing insertion hole where the distance between the facing surfaces is narrow.
(3) In (1), the coated resin portion has a height substantially equal to that of the protruding portion on the first convex portion and has another protruding portion that supports the back surface of the first piece. Described through anchor.
According to this configuration, when the engaging portion of the first piece engages with the engaged portion of the coating resin portion, the back surface of the first piece is with the protruding portion of the second piece and the other protruding portion of the coating resin portion. Since it is supported by, the first piece and the second piece can be stably fixed to the coating resin portion.
(4) The through anchor according to any one of (1) to (3), wherein the first and second pieces are made of a resin material having a lower sliding resistance to the webbing than the coated resin portion.
According to this configuration, when the webbing is in sliding contact with the first and second pieces, the frictional force with the webbing is reduced, and the pulling output of the webbing can be reduced.
(5) A seatbelt device provided with the through anchor according to any one of (1) to (4).
According to this configuration, it is possible to provide a seatbelt device provided with a through anchor that is inexpensive and can easily respond to specification changes.

10 Through anchor 21 Metal plate 30 Coating resin part 31 Webbing insertion hole 33 Long hole part 34, 34A, 34B Insertion hole rising part 35 First piece mounting part 36 Second piece mounting part 37a, 37b Side edge part 38 First convex Part 39 Concave groove (engaged part)
40 End protrusion (other protrusion)
42 Second convex portion 43 Stepped surface 50 First piece 53a, 53b Engaging portion 56a Front end surface 60 Second piece 61 Back surface 64 Protruding portion

Claims (5)

The webbing is provided with a webbing insertion hole through which the webbing is inserted, and the webbing insertion hole has a substantially linear elongated hole portion and a pair of insertion hole rising portions continuous from both ends of the elongated hole portion, and the webbing is described as described above. A through anchor that supports the webbing by being folded back through the webbing insertion hole.
With a metal plate
A coating resin portion that covers the outer surface of the metal plate and
A first piece attached to the coating resin portion so as to cover the lower edge portion of the elongated hole portion, and
A second piece attached to the coating resin portion so as to cover a side edge portion continuous from the lower edge portion at one of the rising portions of the pair of insertion holes.
With
On the back surface of the first piece, an engaging portion that engages with the engaged portion of the coating resin portion is formed.
The second piece has a protrusion that projects from the side surface on the first piece side toward the first piece and supports the back surface of the first piece.
The coating resin portion is shorter than the longitudinal length of the first piece, and has a first ridge portion that guides the back surface of the first piece and a second ridge that guides the concave groove-shaped back surface of the second piece. With a department,
The stepped surface formed between the side edge portion of the insertion hole rising portion formed by the coating resin portion and the second ridge portion is inclined so as to approach the lower edge portion toward the webbing insertion hole. Through anchor that is doing. When the second piece is assembled to the coating resin portion, the protruding portion of the second piece and the first convex portion of the coating resin portion face each other with a gap in the longitudinal direction of the elongated hole portion. The through anchor according to claim 1. The through according to claim 1, wherein the coated resin portion has a height substantially equal to that of the protruding portion on the first convex portion and has another protruding portion that supports the back surface of the first piece. Anchor. The through anchor according to any one of claims 1 to 3, wherein the first and second pieces are made of a resin material having a lower sliding resistance to the webbing than the coated resin portion. A seatbelt device provided with the through anchor according to any one of claims 1 to 4.

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