WO2009107265A1

WO2009107265A1 - Belt guide anchor and seat belt apparatus having the same

Info

Publication number: WO2009107265A1
Application number: PCT/JP2008/066904
Authority: WO
Inventors: 小柳利朗; 淺川裕史; 田端雄樹; 今井亮一
Original assignee: タカタ株式会社
Priority date: 2008-02-26
Filing date: 2008-09-11
Publication date: 2009-09-03
Also published as: JP2009202642A

Abstract

In a belt guide anchor, the curved shape of the cross section of the belt sliding surface of a curved shape section (9b) corresponding to a part adjacent to a center guide hole (10a) in the relief hole (10b) of a belt guide anchor (5) is set to be equal or almost equal to the curved shape of the cross section of the belt sliding surface in the center guide hole (10a). Accordingly, when the seat belt (4) is placed on the sliding surface in the relief hole (10b) while the seat belt is mounted, the seat belt (4) is curved over the relief hole (10b) in the same way as it is curved while placed on the belt sliding surface in the center guide hole (10a). This suppresses the deviation of the seat belt (4).

Description

Specification

Belt guide anchor and seat belt device provided with the same

[0001] The present invention relates to a belt guide force that guides a seat belt pulled out from a seat belt retractor supported by a vehicle body such as a pillar to a shoulder of an occupant, and a technology of a seat belt device using the same It is related to the field.

[0002] Conventionally, a seat belt device attached to a vehicle seat such as an automobile is configured to restrain an occupant with a seat belt in an emergency such as when a large deceleration acts on a vehicle such as a collision. It has become. As such a seat belt device, for example, a seat belt device that is supported by a pillar of a vehicle body and includes a bell rod guide anchor that guides the seat belt so as to be slidable is disclosed in, for example, Japanese Patent Application Laid-Open No. 20002-200964. Various proposals have been made.

[0003] With this belt guide anchor, the seat belt pulled out from the seat belt retractor is bent back by the belt guide anchor and guided toward the occupant's shoulder to fit the occupant. As a result, the seat belt restrains the occupant at the correct position.

FIG. 4 is a front view showing the inside of a conventional belt guide anchor, FIG.

(a) is a cross-sectional view taken along line VA-VA in FIG. 4, FIG. 5 (b) is a cross-sectional view taken along line VB-VB in FIG. 4, and FIG. 5 (c) is a cross-sectional view taken along line VC-VC in FIG. Fig. 5 (d) is a cross-sectional view taken along the line VD-VD in Fig. 4. In the figure, 5 is a belt guide anchor, 8 is a metal plate, 9 is a resin cover part, 9 a is a peripheral part of the belt insertion hole, 9 b is a curved part, 9 is a central curved part, 9b ₂ and 9 b End curve, 9 c and 9 d are flat, 9 g and 9 h are adjacent to the belt sliding member, 9 n and 9 o are the end positions of the relief holes, and 9 p and 9 Q are the diameter change curves , 10 is a belt hole, 10a is a central guide hole, 10b and 10c are escape holes, 11 is a belt sliding member, 11a is a belt sliding surface, 11b is an inclined groove, and is curved This is the boundary line between the shape part and the flat part. [0005] As shown in Fig. 4 and Fig. 5 (a) and (b), the seat belt 4 pulled out from the seat belt retractor 3 can slide in the belt through hole 10 having a belt guide unloading force of 5. Has penetrated. When the seat belt 4 is attached to the occupant, the seat belt 4 penetrating the belt through hole 10 is positioned in the center guide hole 10a and the escape holes 10b, 10c.

[0006] On the other hand, in the conventional belt guide anchor 5, as shown in FIGS. 4 and 5 (a) and 5 (b), the boundary line between the curved portion 9b and the flat portion 9c is From the positions 9 g and 9 h adjacent to the moving member 11 toward the terminal positions 9 n and 9 o of the relief holes 10 b and 10 c, gradually approach the peripheral edge 10 d of the belt insertion hole 10 Is set to In this case, as shown in FIG. 5 (a), the cross-sectional shape of the belt sliding surface 11a of the belt sliding member 11 is formed in a circular arc shape with a radius. Then, the position 9 g, 9h adjacent the belt sliding member 11 as shown in FIG. 5 (b), the radius R ₂ of the central bending portion 9 is greater than the radius Ri, and the end bending portion 9 b _2, 9 b ₃ Radius R ₃ is set smaller than the radius

(R ₃ <Ri <R ₂ ). Further, FIG. 5 (c), in Figure 5 relief hole 10 from the position shown in (b) b, 10 end position c 9 n, 9 o side, the radius R ₄ of the central bending portion 9 bi radius The radius R ₅ is larger than R ₂ and the radius of curvature 9 b ₂ , 9 b ₃ is set to be smaller than radius R ₃ (R ₅ Rs Ri Rs R. Furthermore, as shown in FIG. At the end positions 9 n and 9 o of the relief holes 10 b and 10 c from the position shown in Fig. 5 (c), the radius R ₆ of the central bend 9 bi is larger than the radius R ₄ and the end bend 9 b ₂ , 9 b ₃ Radius R ₇ is set smaller than radius R ₅ (RT Rs Rs Ri Rs I ^ R.

[0007] However, the radius of the curved portion 9b of the resin force par portion 9 at the periphery of both the left and right escape holes 10b, 10c adjacent to the belt sliding member 11 is equal to the cross section of the belt sliding member 11. It is smaller than the radius R i of the shape and gradually decreases continuously toward the end position. Accordingly, as shown in FIG. 5 (b), the seat belt 4 has a radius of curvature between the portion 4b positioned in the central guide hole 10a and the portion 4c positioned in the relief hole 10b in the mounted state. Is different. For this reason, if a large tensile load F is applied to the seat belt 4 during a vehicle collision, etc. The load distribution in the width direction of the belt 4 becomes uneven. As a result, the seat belt 4 is shifted to the escape hole 1 O b side, which is a so-called “jamming” of the seat belt 4 (in FIGS. 4 and 5 (a), (b), The load F is not applied to the seat belt 4 and the seat belt 4 is not offset.) In this way, when the seat belt 4 is displaced (jamming), it is difficult to effectively restrain the passenger by the seat belt. Disclosure of the invention

[0008] An object of the present invention is to provide a belt guide anchor and a seat using the belt guide anchor that can more effectively perform occupant restraint by the seat belt by suppressing occurrence of a deviation (jamming) of the seat belt. It is to provide a belt device.

[0009] In order to achieve the above object, the belt guide anchor of the present invention comprises: a belt through-hole through which a seat belt is slidably inserted; and a part of the periphery of the belt through-hole; A belt sliding portion having a belt sliding surface on which the seat belt slides, wherein the belt insertion hole has a central guide hole and a curved relief formed continuously at both ends of the central guide hole. A seat belt having a curved cross section that crosses the belt sliding surface in a direction orthogonal to the belt sliding portion, and is slidably passed through the belt through hole. In the belt guide anchor for guiding the vehicle toward the occupant, the curved shape of the transverse section of the belt sliding surface corresponding to a part of the escape hole adjacent to the central guide hole is the belt in the central guide hole. Sliding It is characterized in that it is set to the same or substantially the same as the curved shape of the cross section of the surface.

[0010] Further, in the belt guide anchor of the present invention, the belt sliding surface corresponding to a part of the escape hole adjacent to the central guide hole is from the position adjacent to the central guide hole. It is characterized by a corresponding belt sliding surface up to the maximum width position of the hole. [0011] (1) On the other hand, a seat belt device of the present invention includes a seat belt to be worn by a passenger, a seat belt that retracts the seat belt so that the seat belt can be pulled out, and operates in the emergency to prevent the seat belt from being pulled out. A retractor, a belt guide force that guides the seat belt pulled out from the seat belt retractor toward the occupant, and a tander that is slidably supported by the seat belt that has passed through the belt guide anchor. And a belt belt anchor according to claim 1 or 2, wherein the belt guide anchor is provided with at least a buckle that is provided on a vehicle body or a vehicle seat and that is detachably locked to the tanda. It is characterized by the fact that guide force is used.

[0012] According to the belt guide anchor according to the present invention configured as described above, the curved shape of the cross section of the belt sliding surface corresponding to a part of the escape hole adjacent to the center guide hole is obtained by using the center guide. It is set to be the same or almost the same as the curved shape of the cross section of the belt sliding surface in the hole. Therefore, when the seat belt is applied to the sliding surface of the relief hole in the belt mounted state, It is bent in the same manner as it is hung on the belt sliding surface in the hole, so that it is applied to the curved portion. In other words, the radius of curvature of the seat belt is hardly different in the width direction of the seat belt as in the past. Thereby, when a large tensile load is applied to the seat belt in the longitudinal direction (occupant direction) at the time of a vehicle collision or the like, the uneven load applied to the seat belt can be suppressed. In other words, the load distribution in the width direction of the seat belt is more uniform (almost constant) compared to the conventional case. Therefore, it is possible to suppress the deviation (jamming) of the seat belt.

[0013] In addition, according to the seat belt device using the belt guide anchor of the present invention, since the deviation of the seat belt can be suppressed, the slidability of the seat belt can be improved, and the seat bell Durability can be improved. Therefore, the handling operability of the seat belt by the occupant can be maintained well for a long time, and the occupant restraint by the seat belt can be effectively realized for a long time in an emergency. Brief Description of Drawings

FIG. 1 is a diagram schematically showing a seat belt apparatus provided with an example of an embodiment of a belt guide anchor according to the present invention.

FIG. 2 is a front view showing the inside of the belt guide anchor of the example shown in FIG.

Fig. 3 shows the belt guide anchor of the example shown in Fig. 2, where (a) is a cross-sectional view taken along line ΠΙΑ-ΙΠΑ in Fig. 2, and (b) is a cross-sectional view taken along line II-II IB in Fig. 2. (C) is a sectional view taken along line IIIC-IIIC in FIG. 2, and (d) is a sectional view taken along line II ID-II ID in FIG.

FIG. 4 is a front view showing the vehicle inner side of the conventional belt guide force. Fig. 5 shows the belt guide anchor of the example shown in Fig. 4, where (a) is a cross-sectional view taken along line VA-VA in Fig. 4, (b) is a cross-sectional view taken along line VB-VB in Fig. 4, c) is a cross-sectional view taken along the line VC-VC in FIG. 4, and (d) is a cross-sectional view taken along the line VD-VD in FIG. BEST MODE FOR CARRYING OUT THE INVENTION

[0015] The best mode for carrying out the present invention will be described below with reference to the drawings.

FIG. 1 is a view schematically showing a seat belt apparatus provided with an example of an embodiment of a belt guide anchor according to the present invention.

As shown in FIG. 1, a seat belt apparatus 1 of this example is a seat belt retractor fixed to a vehicle body in the vicinity of a vehicle seat 2 in the same manner as a conventionally known three-point seat belt apparatus using a seat belt retractor. 3. The seat belt retractor 3 is pulled out from the seat belt retractor 3 and the front belt anchor 4 a is fixed to the floor of the vehicle body or the vehicle seat 2. The seat belt 4 pulled out from the seat belt retractor 3 is attached to the occupant's shoulder. Belt guide anchor 5 that is guided toward one side, evening 6 that is slidably supported by the seat belt 4 that has been guided by this belt guide unforced force 5, and the floor of the vehicle body Or it is comprised from the buckle 7 which is fixed to the vehicle seat 2 and in which the evening 6 is detachably inserted.

FIG. 2 is a front view showing the inside of the belt guide anchor of this example, FIG.

(a) is a cross-sectional view taken along line ΙΠΑ-ΙΠΑ in Fig. 2, Fig. 3 (b) is a cross-sectional view taken along line ΠΙΒ-ΙΙΙΒ in Fig. 2, and Fig. 3 (c) is taken along line IIIC-IIIC in Fig. 2. FIG. 3D is a cross-sectional view taken along the line IIID-IIID in FIG. In the following description, “up”, “down”, “front”, and “rear” respectively refer to the upper, lower, front of the vehicle, and rear of the vehicle with the belt guide anchor 5 attached to the vehicle body.

[0018] As shown in Fig. 2 and Fig. 3 (a) to (d), the belt guide anchor 5 of this example is a core metal made of a metal plate such as a steel plate, for example, in the same manner as a conventionally known belt guide anchor. The metal plate 8 is configured to be partially covered with a resin force par portion 9 formed by a resin mold (Note that FIG. 2 schematically shows the resin cover portion 9 with its thickness omitted. It is shown). In the resin force par portion 9, an elongated belt through hole 10 is extended in the left-right direction in FIG. The belt guide force 1 is attached to the vehicle body so that the belt through hole 10 is in the vehicle front-rear direction (left-right direction in FIG. 2).

[0019] The belt insertion hole 10 includes a linear central guide hole 10 0a that slidably guides the belt belt 4 and prevents the seat belt 4 from twisting at both ends of the central guide hole 10 0a. It is formed in a substantially U shape from the relief holes 1 O b and 10 c that are curved in a substantially “<” shape. Further, the belt through hole 10 is formed to have a substantially constant width (the width between one side edge of the belt through hole 10 and the other side edge opposite to the one side edge). Has been. Further, the belt insertion hole 10 is formed symmetrically with respect to a vertical line (not shown) located at the center in the left-right direction in FIG. Then, the seat belt 4 pulled out from the seat belt retractor 3 is inserted into the bell rod insertion hole 10 from the lower rear side of the vehicle and from the outside of the passenger compartment, and at the lower front side of the vehicle after passing through the belt through hole 10. It is bent back slidably toward the vehicle interior side.

[0020] As shown in Fig. 3 (a) to (d), the belt in the resin force par 9 The peripheral portion 9a of the through hole 10 has a curved shape portion 9b having a curved cross-sectional surface and a flat cross-sectional surface formed adjacent to the curved shape portion 9b. It is composed of flat flat parts 9 c and 9 d. In that case, the boundary line α between the curved shape portion 9 b and the flat portions 9 c and 9 d is indicated by a two-dot chain line in FIG. 2 (in FIG. 2, the boundary line α is only on the inner side of the belt guide 5. This is also provided on the outside of the belt guide 5 and is indicated by symbols in FIGS. 3 (a) to 3 (d).

A belt sliding member 11 is provided in the resin cover portion 9 at the lower edge portion of the central guide hole 10. A in the belt through hole 10. The belt sliding member 11 is made of a metal plate such as a steel plate or an aluminum plate or a hard resin plate, and the belt sliding surface 11a of the front surface is formed in a curved shape having a relatively large radius and a circular cross section. Yes. A predetermined number (three in the illustrated example) of inclined grooves 11b are formed on the belt sliding surface 11a. These inclined grooves 11 b are formed so as to be substantially along the seat belt 4 passing through the belt insertion hole 10 and parallel or substantially parallel to each other. Further, in the metal plate 8, the resin cover portion 9 and the belt sliding member 11 at the peripheral portion of the belt through hole 10, the vehicle inner portion 9e (the left portion in FIG. 3 (a)) and the vehicle outer portion 9f (Figure 3

The right part in (a) is formed symmetrically with the exception of the inclined groove 11b.

[0022] The boundary line α in Fig. 2 is the maximum left-right position from the positions 9g, 9h adjacent to the belt sliding member 11 (the maximum width of the belt through hole 10 in the direction along the central guide hole 10a). The left and right relief holes 10 b and 10 c are parallel or substantially parallel to the apex 10 0 b 10 c 1 of the curved portions 9 b of the left and right relief holes 10 b and 10 j. The surface of the curved shape portion 9b of the parallel or almost parallel portion of this boundary line << is shown in Fig. 3 (a) and (b). The belt sliding surface 1 1 of the belt sliding member 1 1 It is formed into an arcuate cross-sectional shape with the same radius 1 ^ as the radius of a (the same cross-sectional shape as that of the belt sliding surface 1 1 a), and is a constant bend 9 k, 9 m. The position of the maximum width W 2 of the belt insertion hole 10 in the direction along the central guide hole 10 0 a where the constant-diameter curved portions 9 k and 9 m are set is as follows. It is determined as an area that can be predicted to slide.

[0023] In addition, the boundary line α is the end position 10 of the relief holes 10b, 10c from the position 9i, 9j of the resin force par 9 corresponding to the maximum left / right position of the left / right relief holes 10b, 10c. Up to positions 9 n and 9 o of the resin force par part 9 corresponding to d and 10 e, the diameter-changing curved parts 9 p and 9 q gradually approach the peripheral edges of the left and right relief holes 10 b and 10 c. . A description will be given based on the cross-sectional shape of the diameter change curved portions 9p, 9Q. As shown in FIG. 3 (c), the position 9 i, 9 j side of the diameter change bend 9 p, 9 q, central curved surface 9 bi curved shape portion 9 b is the larger radius R ₈ than the radius of the above End curved surfaces 9 b ₂ and 9 b ₃ connected to both ends of the central curved surface 9 bi and the flat portions 9 c and 9 d are set to a radius R ₉ smaller than the aforementioned radius (ie, Rs Ri Rs).

Furthermore, as shown in FIG. 3 (d), when the curved shape portion 9b approaches the positions 9n and 9o of the resin cover part 9 corresponding to the terminal positions 10b and 10c, The radius of the central curved surface 9 of the curved shape portion 9 b is larger than the radius R ₈ described above. The end curved surfaces 9 b ₂ and 9 b ₃ connected to both ends of the central curved surface 9 and the flat portions 9 c and 9 d are set to a radius smaller than the radius R ₉ described above (that is, Ru Ra R Rs RiQ). Thus, in the radius change curved portions 9 p and 9 q, the radius of the end curved surfaces 9 b ₂ and 9 b ₃ of the curved shape portion 9 b connected to the flat portion 9 c 9 d is the radius of the relief holes 10 b and 10 c. The position gradually decreases as the positions 9 n and 9 o corresponding to the end positions 10 b and 10 c are approached.

[0025] According to the belt guide anchor 5 of this example configured as described above, the peripheral edges of the left and right escape holes 10b, 10c adjacent to the central guide hole 10a (that is, the belt sliding member 11) are arranged. The transverse curved surface 91 ^ of the curved shape portion 9b of the resin cover 9 is formed to have the same radius as the radius of the transverse curved surface of the belt sliding member 11a of the belt sliding member 11. 2 and 3 (b), when the seat belt 4 is placed on the sliding surface 1 Ob ₂ of the left relief hole 10b, the seat belt 4 is hung on the belt sliding member 11. Is curved with a radius Ri and is applied to the curved part 9 b I will become. Thereby, when a large tensile load F is applied to the seat belt 4 in the longitudinal direction (occupant direction) at the time of a vehicle collision or the like, the uneven load applied to the seat belt 4 is suppressed. In other words, the load distribution in the width direction of the seat belt 4 is more uniform (almost constant) than in the past. Therefore, the jamming of the seat bell 卜 4 can be suppressed.

[0026] Further, according to the seat belt device 1 using the belt guide anchor 5 of this example, since the deviation of the seat belt 4 can be suppressed, the slidability of the seat belt 4 can be improved. The durability of the seat belt 4 can be improved. Therefore, the handling operability of the seat belt 4 by the occupant can be satisfactorily maintained for a long time, and the occupant restraint by the seat belt 4 can be effectively realized for a long time in an emergency.

[0027] In the belt guide 1 of the above example, the cross-sectional shape of the belt sliding surface 1 1a of the belt sliding member 1 1 is formed as one arc having a relatively large radius R 1. are, but the cross-sectional shape of the belt sliding surface 1 1 a relatively great radius of the central curved surface 9, and the end curved surface 9 of the relatively small radius than the radius of the central curved surfaces 9 b _2, 9 b ₃ Can also be configured. In this case, the constant-diameter curved portions 9 k and 9 m adjacent to the belt sliding member 11 may be formed in the same shape as the cross-sectional shape of the belt sliding surface 11 a. In short, the present invention is not limited to the above-described examples, and various modifications can be made within the scope of the matters described in the claims.

[0028] The belt sliding member 11 can also be formed of a resin. Further, the belt sliding member 11 can be integrally formed as a belt sliding portion with the same member as the metal plate 8, or can be integrally formed as a belt sliding portion with the same resin member as the resin cover part 9. You can also Industrial applicability

[0029] The belt guide anchor and the seat belt apparatus of the present invention include a belt guide that guides the seat belt pulled out from the seat bell retractor toward the occupant's shoulder and fits the occupant. Guy The present invention can be suitably used for a seat belt device that restrains an occupant with a seat belt that is attached.

Claims

The scope of the claims

1. Belt sliding having a belt hole through which the seat belt is slidable, and a belt sliding surface which forms a part of the periphery of the belt through hole and on which the seat belt slides The belt through hole has a central guide hole and curved relief holes formed continuously at both ends of the central guide hole, and the belt sliding surface includes: In a belt guide force that guides a seat belt that is slidably passed through the belt through-hole and has a curved cross section that intersects in a direction perpendicular to the belt sliding portion,

The curved shape of the cross section of the belt sliding surface corresponding to a part of the escape hole adjacent to the central guide hole is the same as the curved shape of the transverse surface of the belt sliding surface in the central guide hole. Or a belt guide anchor characterized by being set almost the same.

2. A belt sliding surface corresponding to a part of the relief hole adjacent to the central guide hole is a belt corresponding to a position between a position adjacent to the central guide hole and a maximum width position of the belt through hole. 2. The belt guide force of claim 1, wherein the belt guide force is a sliding surface.

3. A seat belt to be mounted on a passenger, a seat belt retractor that retracts the seat belt so as to be retractable, and that operates in an emergency to prevent the seat bell rod from being pulled out, and a seat that is pulled out from the seat belt retractor A belt guide anchor that guides the belt toward the occupant, a tanda that is slidably supported by the seat belt that has passed the belt guide unforce, and a tread that is provided on the vehicle body or the vehicle seat. In a seat belt device having at least a buckle that can be locked,

The belt guide anchor according to claim 1 or 2, wherein the belt guide anchor uses the belt guide anchor.