JP6980084B2 - Anchor device for seat belts - Google Patents

Description

The present invention relates to a seatbelt anchor device fixed to a stud provided on a vehicle body.

In a vehicle, the end of the seatbelt may be coupled to the vehicle body via a seatbelt anchor device. For example, Patent Document 1 discloses an anchor device 110 for a seat belt as shown in FIGS. 11 and 12.

Specifically, the vehicle body is provided with a stud 100 having a large-diameter head 101 and a small-diameter shaft portion 102. The seatbelt anchor device 110 is fixed to the stud 100 and includes an anchor plate 120 and a stopper 130 made of a leaf spring. The stopper 130 is attached to the anchor plate 120 by a rivet 140.

The anchor plate 120 is formed with a first opening 121 to which the webbing of the seat belt is fixed and a keyhole-shaped second opening 122. The second opening 122 has an enlarged portion 123 through which the head 101 of the stud 100 is inserted, and a slit portion 124 extending from the enlarged portion 123 in the direction opposite to the first opening 121. The width of the slit portion 124 is slightly larger than the diameter of the shaft portion 102 of the stud 100 and smaller than the diameter of the head 101 of the stud 100.

The stopper 130 extends in the extending direction of the slit portion 124 so as to cover the second opening 122. The stopper 130 has a locking piece 131 at substantially the center and a pressing piece 132 at the lower end. The locking piece 131 has a head when the anchor plate 120 is moved upward along the extending direction of the slit portion 124 in a state where the head 101 of the stud 100 is inserted through the enlarged portion 123 of the second opening 122. It allows the passage of the 101 and prevents the head 101 from returning to the enlarged portion 123 when the shaft portion 102 of the stud 100 is located at the slit portion 124. The pressing piece 132 presses the head 101 against the anchor plate 120 when the shaft portion 102 is located at the slit portion 124. This prevents the anchor plate 120 from vibrating with respect to the stud 100 and generating abnormal noise.

U.S. Pat. No. 7,540,536

As described above, in the anchor device 110 shown in FIGS. 11 and 12, a part of the stopper 130 covering the second opening 122 is a pressing piece 132. Therefore, after the anchor device 110 is fixed to the stud 100, even if the anchor device 110 is covered with the cover, when the foot or luggage of the occupant of the vehicle hits the stopper 130 through the cover, the stopper 130 May be deformed and the pressing force of the pressing piece 132 may decrease. Such a decrease in the pressing force reduces the abnormal noise prevention function of the stopper 130.

Therefore, it is an object of the present invention to provide a seatbelt anchor device capable of improving the durability of the abnormal noise prevention function of the stopper.

In order to solve the above problems, the seatbelt anchor device of the present invention is a seatbelt anchor device provided on a vehicle body and fixed to a shaft portion and a stud having a head having a head larger than the shaft portion. The fixed portion where the webbing of the seat belt is fixed, the enlarged portion through which the head of the stud is inserted, and the extended portion extending in the opposite direction to the fixed portion from the enlarged portion so that the shaft portion of the stud can pass through the head. an anchor plate apertures that have a pass non slit portion is formed, the attached to the anchor plate, a stopper made of a metal leaf spring, the head of the stud before Ki拡most When the anchor plate is moved along the extending direction of the slit portion while being inserted into the head, the head is allowed to pass through, and when the shaft portion of the stud is located at the slit portion, the head portion is allowed to pass through. A locking piece that prevents the head from returning to the enlarged portion, a first plate-shaped portion that abuts on the side of the anchor plate and the opening, and a second plate-shaped portion that is provided with a gap from the anchor plate. A portion, a connecting portion that connects the first plate-shaped portion and the second plate-shaped portion at each end portion on the direction side from the enlarged portion toward the slit portion, and the locking piece is the locking piece. It is characterized by having a stopper provided on the second plate-shaped portion.

According to the above configuration, when the anchor device is fixed to the stud, the anchor plate is pressed against the vehicle body by the urging force of the urging piece of the stopper. Therefore, it is prevented that the anchor plate vibrates with respect to the stud and an abnormal noise is generated. Moreover, since the urging piece is interposed between the stud's head and the anchor plate, the stud's head prevents the foot or luggage of the vehicle occupant from hitting the urging piece directly or through the cover. To. That is, the head of the stud serves to protect the urging piece of the stopper. Therefore, the durability of the abnormal noise prevention function of the stopper can be improved .

According to the present invention, the durability of the abnormal noise prevention function of the stopper can be improved.

It is a perspective view seen from the front side of the seat belt anchor device which concerns on a reference embodiment of this invention. It is an exploded perspective view of the anchor device shown in FIG. 1 as seen from the back side. FIG. 3 is a cross-sectional view taken along the line III-III of FIG. It is sectional drawing of the state just before the anchor device shown in FIG. 1 is fixed to a stud. It is sectional drawing of the state in which the anchor device shown in FIG. 1 is being fixed to a stud. It is sectional drawing of the state after the anchor device shown in FIG. 1 is fixed to a stud. It is a perspective view of the state after the anchor device shown in FIG. 1 is fixed to a stud. It is a perspective view seen from the front side of the seat belt anchor device which concerns on one Embodiment of this invention. FIG. 6 is an exploded perspective view of the anchor device shown in FIG. 6 as viewed from the back side. 6 is a cross-sectional view taken along the line VIII-VIII of FIG. It is sectional drawing of the state just before the anchor device shown in FIG. 6 is fixed to a stud. It is sectional drawing of the state in which the anchor device shown in FIG. 6 is being fixed to a stud. It is sectional drawing of the state after the anchor device shown in FIG. 6 is fixed to a stud. It is a perspective view of the state after the anchor device shown in FIG. 6 is fixed to a stud. It is a perspective view of the conventional seat belt anchor device. FIG. 11 is a cross-sectional view of a state in which the anchor device shown in FIG. 11 is fixed to a stud.

( Reference form)
FIGS. 1 to 3 show the seatbelt anchor device 1A according to the reference embodiment of the present invention. As shown in FIGS. 4C and 5, the anchor device 1A is fixed to a stud 6 provided on the vehicle body 5.

The stud 6 has a large-diameter head 61 and a small-diameter shaft portion 62. In this reference embodiment, the stud 6 has a flange 63 at a position along the vehicle body 5, and an anchor plate 2 described later is pressed against the flange 63. However, the flange 63 can be omitted, and the anchor plate 2 may be directly pressed against the vehicle body 5.

The anchor device 1A includes an anchor plate 2 and a stopper 3 made of a metal leaf spring. The stopper 3 is attached to the anchor plate 2 by a rivet (mounting member) 4. The metal constituting the stopper 3 is not particularly limited, but is, for example, steel.

The anchor plate 2 is formed with an opening 20 divided into a first opening 21 which is a fixing portion to which a seatbelt webbing (not shown) is fixed and a keyhole-shaped second opening 22 (see FIG. 2). Has been done. The second opening 22 has a circular enlarged portion 23 through which the head 61 of the stud 6 is inserted, and a slit portion 24 extending from the enlarged portion 23 in the direction opposite to the first opening 21. The width of the slit portion 24 is slightly larger than the diameter of the shaft portion 62 of the stud 6 and smaller than the diameter of the head portion 61 of the stud 6. As a result, the shaft portion 62 can pass through the slit portion 24 (it can enter the slit portion 24 from the enlarged portion 23), but the head portion 61 cannot pass through the slit portion 24.

In the following, for convenience of explanation, the extending direction of the slit portion 24 is in the vertical direction (the first direction from the enlarged portion 23 toward the slit portion 24 is downward, and the opposite second direction is upward) based on FIG. ), And the width direction of the slit portion 24 is called the left-right direction.

The stopper 3 overlaps with the anchor plate 2 on the lower side from between the first opening 21 and the second opening 22 of the anchor plate 2, and has the same size as that portion. A pair of left and right through holes 25 through which the rivet 4 is inserted are provided on both sides of the upper apex of the enlarged portion 23 of the second opening 22 of the anchor plate 2. On the other hand, a pair of left and right through holes 38 through which the rivet 4 is inserted are also provided on the upper portion of the stopper 3. The stopper 3 is attached to the anchor plate 2 by inserting and crimping the rivet 4 through the through hole 25 and the through hole 38 in a state where the positions match.

A tongue-shaped opening 30 is provided substantially in the center of the stopper 3. The U-shaped contour of the tongue-shaped opening 30 substantially coincides with the contour of the slit portion 24 of the second opening 22. That is, the width of the tongue-shaped opening 30 is about the same as the width of the slit portion 24 of the second opening 22.

The stopper 3 includes a locking piece 31 projecting downward toward the tongue-shaped opening 30 and a U-shaped urging piece 32 surrounding the tongue-shaped opening 30. The locking piece 31 is located at a position corresponding to the enlarged portion 23 of the second opening 22 of the anchor plate 2 and at a position separated from the surface of the anchor plate 2. Further, the stopper 3 includes an operation piece 39 continuous with the locking piece 31, and the operation piece 39 projects upward in the opposite direction to the locking piece 31.

The lower end, which is the tip of the locking piece 31, is bent toward the anchor plate 2. In the locking piece 31, the anchor plate 2 is moved upward along the extending direction of the slit portion 24 in a state where the head 61 of the stud 6 is inserted into the enlarged portion 23 of the second opening 22 (see FIG. 4A). At that time, the head 61 is allowed to pass while being in contact with the head 61 by elastically deforming so as to be separated from the anchor plate 2 (see FIG. 4B). Further, the locking piece 31 is arranged so as to prevent the head portion 61 from returning to the enlarged portion 23 when the shaft portion 62 of the stud 6 is located at the slit portion 24 as shown in FIG. 4C.

Since the head 61 cannot pass through the slit portion 24, the state in which the stud 6 is inserted into the second opening 22 is maintained, and the anchor device 1A is fixed to the stud 6 provided in the vehicle body 5.

When the anchor device 1A is removed from the stud 6, the locking piece 31 is separated from the anchor plate 2 by pushing the operation piece 39 from the state shown in FIG. 4C and elastically deforming it so as to approach the anchor plate 2. As a result, the head 61 of the stud 6 is allowed to return to the enlarged portion 23. As described above, the anchor device 1A of the present reference embodiment is configured so that the operation piece 39 can be operated from the upper side of the anchor plate 2, that is, the side close to the occupant. On the other hand, in the conventional anchor device 110 shown in FIGS. 11 and 12, the lower end of the anchor plate 120, that is, the pressing piece 132 on the side away from the occupant is operated so that the locking piece 131 is separated from the anchor plate 120. It is necessary to elastically deform the stopper 130. Therefore, the anchor device 1A of the present reference embodiment has better operability than the conventional anchor device 110.

When the shaft portion 62 of the stud 6 is located at the end of the slit portion 24, the urging piece 32 is interposed between the head portion 61 and the anchor plate 2 to attach the head portion 61 away from the anchor plate 2. The force suppresses the relative vibration between the stud 6 and the anchor plate 2.

More specifically, the urging piece 32 includes a pair of left and right fulcrum portions 33, a pair of left and right inclined portions 34, a pair of left and right pressing portions 35, and a bridge portion 36 in this order from the upper side. The pair of fulcrum portions 33 are separated from each other with the tongue-shaped opening 30 interposed therebetween. The same applies to the pair of inclined portions 34 and the pair of pressing portions 35. That is, the fulcrum portion 33, the inclined portion 34, and the pressing portion 35 are located on both sides of the slit portion 24 of the second opening 22.

Each fulcrum portion 33 comes into surface contact with the anchor plate 2. Each inclined portion 34 is inclined downward from the lower end of the fulcrum portion 33 so as to be away from the anchor plate 2. Each pressing portion 35 extends downward from the lower end of the inclined portion 34 in parallel with the anchor plate 2. Each pressing portion 35 comes into contact with the back surface of the head portion 61 when the shaft portion 62 of the stud 6 is located at the slit portion 24. The bridge portion 36 connects the lower ends, which are the tips of the pressing portions 35, to each other.

In this reference embodiment, the bridge portion 36 is inclined in the opposite direction to the inclined portion 34. That is, the bridge portion 36 is inclined downward from the lower end of the pressing portion 35 so as to approach the anchor plate 2, and is in contact with the anchor plate 2 at the lower end.

Further, in the present reference embodiment, each of the fulcrum portions 33 of the urging piece 32 is provided with hooks 37 that engage with the back surface of the anchor plate 2. The hook 37 has a locking piece 31 in which the urging piece 32 elastically deforms when the anchor plate 2 is moved upward with the head 61 of the stud 6 inserted through the enlarged portion 23 of the second opening 22. At the same time, it is prevented from being separated from the anchor plate 2. At the same time, when the shaft portion 62 is displaced into the slit portion 24 of the anchor plate 2, the fulcrum portion 33 is maintained between the head portion 61 of the stud 6 and the anchor plate 2, and the urging piece 32 is the back surface of the head portion 61. (See FIG. 4B). After that, the head 61 abuts on each inclined portion 34 of the urging piece 32, the urging piece 32 is elastically deformed so as to approach the anchor plate 2, and the shaft portion 62 of the stud 6 is attached to the end portion of the slit portion 24. When positioned, each inclined portion 34, each pressing portion 35, and a part of the bridge portion 36 are interposed between the head 61 of the stud 6 and the anchor plate 2 in a state where the urging piece 32 is elastically deformed. The head 61 is urged away from the anchor plate 2 (see FIGS. 4C and 5).

As described above, in the anchor device 1A of the present reference embodiment, when the anchor device 1A is fixed to the stud 6, the anchor plate 2 is transferred to the flange 63 of the stud 6 by the urging force of the urging piece 32 of the stopper 3 (vehicle body). Pressed against the side). Therefore, it is prevented that the anchor plate 2 vibrates with respect to the stud 6 and an abnormal noise is generated. Moreover, since the urging piece 32 is interposed between the head 61 of the stud 6 and the anchor plate 2, the foot or luggage of the occupant of the vehicle may hit the urging piece directly or through the cover of the stud 6. It is suppressed by the head 61. That is, the head 61 of the stud 6 plays a role of protecting the urging piece 32 of the stopper 3. Therefore, the durability of the abnormal noise prevention function of the stopper 3 can be improved.

(Implementation form)
Figure 6-10 shows a seat belt anchor apparatus 1B according to an embodiment of the present invention. As shown in FIGS. 9C and 10, the anchor device 1B is fixed to a stud 6 provided on the vehicle body 5. In the present embodiment, the same components as those in the reference embodiment are designated by the same reference numerals, and duplicate description will be omitted.

In this embodiment, the anchor device 1B includes a stopper 7 having a shape different from that of the reference embodiment. The stopper 7 is made of a metal leaf spring and is attached to the anchor plate 2 by a rivet 4. The metal constituting the stopper 7 is not particularly limited, but is, for example, steel.

The stopper 7 overlaps with the anchor plate 2 on the lower side from the intermediate position of the second opening 22 of the anchor plate 2, and has the same size as that portion. A pair of left and right through holes 25 through which the rivet 4 is inserted are provided on both sides of the upper end of the slit portion 24 of the second opening 22 of the anchor plate 2. On the other hand, a pair of left and right through holes 78 through which the rivet 4 is inserted are also provided on the upper portion of the stopper 7. The stopper 7 is attached to the anchor plate 2 by inserting and crimping the rivet 4 through the through hole 25 and the through hole 78 in a state where the positions match.

The stopper 7 is bent in a U shape that opens upward when viewed from the side. Specifically, the stopper 7 is provided so as to face the first plate-shaped portion 7A that abuts on the anchor plate 2 and the first plate-shaped portion 7A with a gap , in other words, the anchor plate 2 and the gap. The second plate-shaped portion 7B and the folded portion (connecting portion) 7C connecting the lower ends of the first plate-shaped portion 7A and the second plate-shaped portion 7B are included.

The first plate-shaped portion 7A is provided with a tongue-shaped opening 70 which is a notch from the upper side. The U-shaped contour of the tongue-shaped opening 70 substantially coincides with the contour of the slit portion 24 of the second opening 22. That is, the width of the tongue-shaped opening 70 is about the same as the width of the slit portion 24 of the second opening 22.

The second plate-shaped portion 7B is provided with a substantially rectangular central opening 84 at a position corresponding to the tongue-shaped opening 70. Further, the second plate-shaped portion 7B is provided with a locking piece 71 that projects downward toward the center of the central opening 84. The locking piece 71 is located at a position corresponding to the enlarged portion 23 of the second opening 22 of the anchor plate 2 and at a position separated from the surface of the anchor plate 2.

The lower end, which is the tip of the locking piece 71, is bent toward the anchor plate 2. In the locking piece 71, the anchor plate 2 is moved upward along the extending direction of the slit portion 24 in a state where the head 61 of the stud 6 is inserted into the enlarged portion 23 of the second opening 22 (see FIG. 9A). At that time, the head 61 is allowed to pass while being in contact with the head 61 by elastically deforming so as to be separated from the anchor plate 2 (see FIG. 9B). Further, the locking piece 71 is arranged so as to prevent the head portion 61 from returning to the enlarged portion 23 when the shaft portion 62 of the stud 6 is located at the slit portion 24 as shown in FIG. 9C.

When removing the anchor device 1A from the stud 6, the upper end of the second plate-shaped portion 7B is operated from the state shown in FIG. 9C so that the locking piece 71 is separated from the anchor plate 2 as a whole of the second plate-shaped portion 7B. Is elastically deformed. As a result, the head 61 of the stud 6 is allowed to return to the enlarged portion 23. As described above, the anchor device 1B of the present embodiment can be operated from the upper side of the anchor plate 2, that is, the side closer to the occupant when it is removed from the stud 6. On the other hand, in the conventional anchor device 110 shown in FIGS. 11 and 12, the lower end of the anchor plate 120, that is, the pressing piece 132 on the side away from the occupant is operated so that the locking piece 131 is separated from the anchor plate 120. It is necessary to elastically deform the stopper 130. Therefore, the anchor device 1B of the present embodiment has better operability than the conventional anchor device 110.

A U-shaped notch 82 larger than the contour of the tongue-shaped opening 70 is formed in the first plate-shaped portion 7A. A U-shaped urging piece 72 surrounding the tongue-shaped opening 70 is formed between the notch 82 and the tongue-shaped opening 70.

Further, the first plate-shaped portion 7A includes a base portion 81 that comes into surface contact with the anchor plate 2 around the urging piece 72. A folded-back portion 7C is connected to the base portion 81.

In this embodiment, a groove 83 is provided from the center of the notch 82 through the folded-back portion 7C to the lower end of the second plate-shaped portion 7B, and the folded-back portion 7C is divided into left and right by this groove 83. .. However, the groove 83 may be omitted and the folded-back portion 7C may be a continuous one.

When the shaft portion 62 of the stud 6 is located at the end of the slit portion 24, the urging piece 72 is interposed between the head portion 61 and the anchor plate 2 to attach the head portion 61 away from the anchor plate 2. The force suppresses the relative vibration between the stud 6 and the anchor plate 2.

More specifically, the urging piece 72 includes a pair of left and right fulcrum portions 73, a pair of left and right inclined portions 74, a pair of left and right pressing portions 75, and a bridge portion 76 in this order from the upper side. The pair of fulcrum portions 73 are separated from each other with the tongue-shaped opening 70 interposed therebetween. The same applies to the pair of inclined portions 74 and the pair of pressing portions 75. That is, the fulcrum portion 73, the inclined portion 74, and the pressing portion 75 are located on both sides of the slit portion 24 of the second opening 22.

Each fulcrum portion 73 comes into surface contact with the anchor plate 2. Each inclined portion 74 is inclined downward from the lower end of the fulcrum portion 73 so as to be away from the anchor plate 2. Each pressing portion 75 extends downward from the lower end of the inclined portion 74 in parallel with the anchor plate 2. Each pressing portion 75 comes into contact with the back surface of the head portion 61 when the shaft portion 62 of the stud 6 is located at the slit portion 24. The bridge portion 76 connects the lower ends, which are the tips of the pressing portions 75, to each other.

When the shaft portion 62 is displaced into the slit portion 24 of the anchor plate 2, the head portion 61 abuts on each inclined portion 74 of the urging piece 72 (see FIG. 9B), and the urging piece 72 approaches the anchor plate 2. When the shaft portion 62 of the stud 6 is elastically deformed and is located at the end of the slit portion 24, one of the inclined portions 74, the pressing portions 75, and the bridge portion 76 in a state where the urging piece 72 is elastically deformed. A portion is interposed between the head portion 61 of the stud 6 and the anchor plate 2 to urge the head portion 61 away from the anchor plate 2 (see FIGS. 9C and 10).

In the present embodiment, the bridge portion 76 is continuous with the pressing portion 75 and is parallel to the anchor plate 2. However, as in the reference mode, the bridge portion 76 may be inclined downward from the lower end of the pressing portion 75 so as to approach the anchor plate 2, and may be in contact with the anchor plate 2 at the lower end.

As described above, in the anchor device 1B of the present embodiment, when the anchor device 1B is fixed to the stud 6, the anchor plate 2 is the flange 63 of the stud 6 (vehicle body) due to the urging force of the urging piece 72 of the stopper 7. Pressed against the side). Therefore, it is prevented that the anchor plate 2 vibrates with respect to the stud 6 and an abnormal noise is generated. Moreover, since the urging piece 72 is interposed between the head 61 of the stud 6 and the anchor plate 2, it is possible that the foot or luggage of the occupant of the vehicle hits the urging piece directly or through the cover. It is suppressed by the head 61. That is, the head 61 of the stud 6 plays a role of protecting the urging piece 72 of the stopper 3. Therefore, the durability of the abnormal noise prevention function of the stopper 7 can be improved.

(Other embodiments)
The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention.

For example, the urging piece (32 or 72) does not necessarily have to be U-shaped, but one inclined portion (34 or 74) and one arranged on only one side of the slit portion 24 of the second opening 22. It may be linear with a pressing portion (35 or 75). However, if the urging piece (32 or 72) is U-shaped as in the above embodiment, the pressing portions (35 or 75) are present on both sides of the slit portion 24, so that the anchor plate is attached to the stud 6. Even if 2 is tilted, the urging piece can stably urge the head 61 of the stud 6. Moreover, since the load applied to the urging piece (32 or 72) that urges the head 61 of the stud 6 is distributed, it is possible to suppress a decrease in the elasticity of the urging piece.

Further, the urging piece (32 or 72) does not necessarily have to have a pressing portion (35 or 75) parallel to the anchor plate 2, and may be inclined as a whole. However, as in the above embodiment, if the urging piece (32 or 72) has a pressing portion (35 or 75) parallel to the anchor plate 2, the urging piece has a large area and the head 61 of the stud 6. Since they come into contact with each other, the effect of preventing abnormal noise can be enhanced.

1A, 1B Seatbelt anchor device 2 Anchor plate
20 Opening 21 First opening (fixed part)
22 2nd opening 23 Enlarged part 24 Slit part 3 Stopper 31 Locking piece 32 Bounced piece 34 Inclined part 35 Pressing part 36 Bridge part
4 rivets (mounting members)
5 Body 6 Stud 61 Head 62 Shaft 7 Stopper 71 Locking piece 72 Bounce piece 74 Inclined part 75 Pressing part 76 Bridge part 7A 1st plate-shaped part 7B 2nd plate-shaped part 7C Folded part (connecting part)
81 Base

Claims (3)

An anchor device for a seat belt, which is fixed to a shaft portion and a stud having a head having a diameter larger than the shaft portion, which is provided on the vehicle body.
The fixed part where the webbing of the seat belt is fixed, the enlarged part through which the head of the stud is inserted, and the shaft part of the stud that extends in the opposite direction to the fixed part from the enlarged part and cannot pass through the head. an anchor plate which apertures are formed that have a such slits,
Wherein attached to the anchor plate, a stopper made of a metal leaf spring, wherein the anchor plate along the extending direction of the slit portion in a state in which the head of the stud is inserted before Ki拡most A locking piece that allows the head to pass through when moved and prevents the head from returning to the enlarged portion when the shaft portion of the stud is located in the slit portion, and the anchor plate. A first plate-shaped portion that abuts on the side of the opening, a second plate-shaped portion provided with a gap from the anchor plate, and the first plate-shaped portion and the second plate-shaped portion. The locking piece includes a connecting portion connected at each end on the direction side from the enlarged portion toward the slit portion, and the locking piece is a stopper provided on the second plate-shaped portion.
Anchor device for seat belts. The seatbelt anchor device according to claim 1, wherein the connecting portion is a folded portion. The seatbelt anchor device according to claim 1 or 2, wherein the stopper is attached to the anchor plate by a mounting member on the side of the opening.

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