JP2013032062A - Seat belt device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat belt device that can suppress generation of jamming in an emergency.SOLUTION: The seat belt device 100 includes: a through anchor 108 that has a belt-like webbing 104 that constrains the occupant to the seat and a passage hole 118 that passes the webbing 104; and a shaft member 120 that rotatably installs in the vehicle longitudinal direction, the through anchor 108 to the center pillar 116 in a passenger compartment. The through anchor 108 has a bearing bore 128 that contains the part wider than a diameter D1 of a shaft member 120 so that the through anchor 108 can be inclined to the center pillar 116. The seat belt device 100 further includes a collar member 122 that is cylindrical and passing the shaft member 120 inside, and set up touching the center pillar 116 and the through anchor 108 wherein, the collar member 122 is plastic deformable upon receiving the load from the through anchor 108.

Description

  The present invention relates to a seat belt device for restraining an occupant to a seat using webbing.

  A seat belt device is installed in the seat of the vehicle. The seat belt device is a safety device for preventing a passenger from jumping forward due to inertial force when a large deceleration acts on the vehicle due to a sudden stop or a collision. The seat belt device restrains an occupant to a seat using belt-shaped webbing. The webbing is housed in a retractor installed on the side of the seat. On the other hand, the front end side of the webbing is drawn upward from the retractor, is folded downward through a through anchor disposed on a side wall in the vehicle compartment, and is fixed to an anchor plate near the floor.

  A passenger-mounted tongue plate is passed through the webbing between the through anchor and the anchor plate. The passenger pulls the tongue plate to pull out the webbing from the retractor, and inserts the tongue plate into a buckle disposed on the opposite side of the seat (vehicle center side). As a result, the webbing is constrained by the webbing from the passenger's shoulder to the opposite waist, and the seat belt device is completely attached.

  In the above-described three-point seat belt device that fixes the left and right sides of the shoulder and waist, there has been a concern over the occurrence of a phenomenon called jamming. Jamming is a phenomenon in which wrinkles approach webbing and clog the end of one side of the through-anchor through hole. Jamming tends to occur when the webbing is abruptly wound or pulled out by the retractor. Therefore, various techniques for preventing jamming are currently proposed.

  For example, Patent Document 1 describes a webbing insertion member (through anchor) that can prevent jamming when a pretensioner mechanism (an automatic winding mechanism that operates in an emergency) is activated. In this through anchor, an attachment hole for passing a bolt for attachment to a vehicle is provided so as to be offset in the vehicle front-rear direction with respect to a passage hole through which the webbing passes. As a result, when the webbing is suddenly drawn by the pretensioner mechanism, the pulling of the through anchor due to the webbing is offset, and the through anchor is prevented from being inclined.

JP 2007-1577 A

  As described in Patent Document 1, it is considered that the force applied to the through anchor when the pretensioner mechanism winds up the webbing is substantially in the vehicle front-rear direction. However, in an actual emergency, the force applied to the webbing and the through anchor by supporting the occupant is not limited to the longitudinal direction of the vehicle.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a seat belt device capable of suppressing the occurrence of jamming in an emergency.

  In order to solve the above problems, a representative configuration of a seat belt device according to the present invention is a seat belt device for restraining an occupant to a seat, and includes a belt-like webbing and a through anchor having a passage hole through which the webbing passes. A through-anchor is attached to the side wall of the vehicle interior so as to be rotatable in the vehicle front-rear direction. The through-anchor is a bearing hole through which the shaft member passes, and the through-anchor is located on the side wall as viewed from above the vehicle. The seat belt device further includes a bearing hole including a portion wider than the diameter of the shaft member so as to be inclined, and the seat belt device is tubular and is installed in contact with the side wall and the through anchor through the shaft member. A collar member comprising a collar member that can be plastically deformed by receiving a load from a through anchor.

  The through anchor is normally supported by a collar member, and maintains a stable posture along the side wall in the same manner as a conventional through anchor. However, when the webbing is strongly pulled diagonally forward by receiving a load from the occupant in an emergency, the collar member undergoes plastic deformation by receiving an excessive load from the through anchor. This allows the through anchor to change its posture so as to face in the pulled direction. Further, the collar member acts as a cushioning material by plastic deformation, and can absorb the impact when the webbing is suddenly pulled out without transmitting it to the occupant. And by this posture change, the possibility that the webbing is shifted to the corner of the passage hole is reduced. Therefore, occurrence of jamming can be suppressed.

  The through anchor may be tilted with respect to the side wall so that the vehicle inner side of the through anchor faces in the pulling direction of the webbing by the occupant. In this way, the through anchor tilts following the tension direction of the webbing in an emergency, so that the webbing can be prevented from wrinkling and shifting, and jamming can be efficiently suppressed.

  The collar member is preferably made of a synthetic resin. If it is made of a synthetic resin that can be easily molded, it is possible to easily design the color member to have such a strength that causes plastic deformation when the excessive load described above is applied.

  Said collar member is good to have the inclined surface which makes the end part by the side of a through anchor taper shape. In other words, the collar member has a shape that does not have a corner on the through anchor side, and this configuration enables a smooth posture change of the through anchor.

  The through anchor may further include a deformable spacer member that is attached between the bearing hole and the shaft member. By providing this spacer member, in a normal state, the shaft member can support the through anchor in a stable posture even if the bearing hole is wide.

  In order to solve the above-mentioned problems, another typical configuration of the seat belt apparatus according to the present invention is a seat belt apparatus for restraining an occupant to a seat, and includes a belt-shaped webbing and a through hole through which the webbing passes. An anchor and a shaft member that is attached to the side wall of the vehicle interior so as to be rotatable in the vehicle front-rear direction. The through anchor is a bearing hole through which the shaft member passes, and is seen through the side wall as viewed from above the vehicle. It has a bearing hole that includes a portion wider than the diameter of the shaft member so that the anchor can be tilted. The seat belt device is further cylindrical, and the shaft member passes through the shaft member between the side wall and the through anchor. The first collar member is disposed on the first collar member, and the second collar member is disposed so as to cover the first collar member. The first collar member has a groove along the outer periphery, and the second collar member has an inner diameter. First A hook portion which is large enough to form a gap with the member and protrudes toward the groove portion and fits into the groove portion in a state where the second collar member is in contact with the through anchor portion. When the load is received, the posture can be changed by the hook part being detached from the groove part.

  Also with the above configuration, in an emergency, the through anchor can change its posture so as to face in the direction in which the webbing is pulled. Therefore, it is possible to suppress the occurrence of jamming because the possibility that the webbing is shifted to the corner of the passage hole due to the posture change is reduced.

  ADVANTAGE OF THE INVENTION According to this invention, the seatbelt apparatus which can suppress generation | occurrence | production of jamming in an emergency can be provided.

It is the figure which illustrated the seatbelt apparatus concerning 1st Embodiment. FIG. 2 is a detailed view of the vicinity of the through anchor in FIG. 1. It is AA sectional drawing of Fig.2 (a). It is the figure which illustrated each attitude | position which the through anchor of FIG. 1 can take. It is the figure which illustrated the seatbelt apparatus concerning 2nd Embodiment. It is the figure which illustrated each attitude | position of the through anchor corresponding to the BB cross section of Fig.5 (a).

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

(First embodiment)
FIG. 1 is a diagram illustrating a seat belt device 100 according to the first embodiment. In the following drawings including FIG. 1, the vehicle width direction is indicated by the X axis, the vehicle longitudinal direction is indicated by the Y axis, and the vehicle vertical direction is indicated by the Z axis.

  As illustrated in FIG. 1, the seat belt device 100 is a safety device provided in the seat 102, and restrains an occupant to the seat 102 using a belt-like webbing 104. The webbing 104 is wound around the retractor 106 at the base side, and the tip side is folded downward through the upper through anchor 108 and fixed to the anchor plate 110. A tongue plate 112 is provided between the through anchor 108 and the anchor plate 110, and the occupant inserts the tongue plate 112 into the buckle 114 to be put on.

  The through anchor 108 is attached to a center pillar 116 that is a part of the side wall. A through hole 118 is provided in the through anchor 108, and the webbing 104 passes through the through hole 118. The through anchor 108 is attached to the center pillar 116 by a shaft member 120 and can move so as to rotate in the vehicle front-rear direction around the shaft member 120.

  FIG. 2 is a detailed view of the vicinity of the through anchor 108 of FIG. FIG. 2A is a perspective view of the vicinity of the through anchor 108 as seen from the rear of the vehicle. As illustrated in FIG. 2A, as a feature of the present embodiment, a collar member 122 is attached around the shaft member 120 between the through anchor 108 and the center pillar 116. The collar member 122 is in contact with the through anchor 108 and the center pillar 116 and supports the through anchor 108 in the normal posture.

  FIG. 2B is an exploded view of the vicinity of the through anchor 108 in FIG. As illustrated in FIG. 2B, the collar member 122 is a cylindrical member, and a synthetic resin is used as the material. An inclined surface 124 is formed at the end of the collar member 122 on the through anchor side, and has a tapered (tapered) shape. The shaft member 120 passes through the spacer member 132 a and the bearing hole 128 of the through anchor 108, passes through the inside of the spacer member 132 a and the collar member 122, and is fixed to the mounting hole 130 of the center pillar 116.

  FIG. 3 is a cross-sectional view taken along the line AA in FIG. In the present embodiment, the bearing hole 128 is set wider than the diameter D1 of the shaft member 120. With this configuration, a gap is formed between the bearing hole 128 and the shaft member 120. The bearing hole 128 only needs to include at least a portion wider than the diameter D1 of the shaft member 120.

  With the above configuration, the posture of the through anchor 108 with respect to the shaft member 120 becomes unstable if it is originally. Therefore, in the present embodiment, spacer members 132 a and 132 b are attached between the flange 121 of the bearing hole 128 and the through anchor 108 and between the through anchor 108 and the collar member 122. As a result, the gap between the shaft member 120 and the bearing hole 128 is closed, and the through anchor 108 can move stably and smoothly in a normal state. For the material of the spacer members 132a and 132b, a deformable material such as a synthetic resin is used, and it is particularly preferable that the spacer member 132a and 132b have a lower strength than the collar member 122 and can be easily deformed. The through anchor 108 is also supported by a collar member 122 that is in contact with the outside of the vehicle, so that the posture of the through anchor 108 during normal operation is stable. Only when a strong load is generated as in an emergency, the posture described below can be taken.

  FIG. 4 is a diagram illustrating each posture that the through anchor 108 of FIG. 1 can take. In FIG. 4, the through anchor 108 is illustrated as seen from above the vehicle, the X axis represents the vehicle width direction, and the Y axis represents the vehicle front-rear direction.

  FIG. 4A illustrates a normal posture of the through anchor 108. As described above, the normal through anchor 108 is supported by the collar member 122 so as to cross the shaft member 120 substantially vertically, in other words, along the center pillar 116.

  In the normal posture of FIG. 4A, when an emergency occurs in the vehicle, the seat belt device 100 works to prevent the vehicle from jumping forward due to the inertia of the occupant. At that time, a load is applied to the webbing 104 to support the occupant's body, and the webbing 104 is strongly pulled from the through anchor 108 diagonally forward (downwardly diagonally to the left in the figure). At this time, although illustration is omitted, since the conventional through anchor can only rotate in the vehicle front-rear direction (Y-axis left-right direction in the figure) around the shaft member 120, the webbing 104 passes through the passage hole 118 ( There is a possibility that jamming may occur due to gathering at the front end 119 of FIG. 2 (a). Therefore, in the seat belt device 100, the posture can be changed by the configuration including the collar member 122 described above.

  FIG. 4B is a diagram illustrating the posture of the through anchor 108 in an emergency. As illustrated in FIG. 4B, when the webbing 104 is pulled diagonally forward (diagonally downward in the left direction in the figure) due to a strong load, the bearing hole 128 (see FIG. 3) of the through anchor 108 becomes the shaft member 120. Since the width is wider than the diameter D <b> 1, a load is generated in the through anchor 108 to follow the pulling direction of the webbing 104. This load deforms the spacer member 132a (spacer member 132b), and is further transmitted to the collar member 122 through the through anchor 108. If the load at that time is excessive, the collar member 122 undergoes plastic deformation and is compressed. As a result, the through anchor 108 tilts so that the rear end side of the through anchor 108 moves away from the center pillar 116 toward the front of the vehicle, in other words, the inboard side surface 108a of the through anchor 108 faces the pulling direction (left obliquely downward in the figure). It becomes possible. Due to this posture, the possibility that the webbing 104 is shifted to the end 119 of the passage hole 118 (FIG. 2A) is reduced, so that jamming can be prevented.

  When the posture of the through anchor 108 is changed, the collar member 122 plastically deforms to act as a cushioning material, and can absorb the impact when the webbing 104 is suddenly pulled out without being transmitted to the occupant. Further, since the posture change of the through anchor 108 can be prevented, the jamming prevention effect is improved.

  In the present embodiment, the through anchor side of the collar member 122 is omitted from the corners and the inclined surface 124 is formed, so that the posture can be changed more smoothly. In this embodiment, the color member 122 is made of a synthetic resin material, and can be easily designed even if the color member 122 is strong enough to cause plastic deformation only when an excessive load is applied. It is possible.

  The collar member 122 may be provided with a notch (not shown) having an arbitrary shape around the collar member 122 so as to serve as a guide when plastic deformation occurs. By providing such a notch, for example, it is possible to control the direction in which plastic deformation occurs, such as plastic deformation so that the collar member 122 falls on the side where the notch is formed. The angle of the collar member 122 that contacts the through anchor 108 before the deformation can be arbitrarily changed, and the through anchor 108 is installed at a predetermined angle with respect to the center pillar 116 from the beginning. Also good.

(Second Embodiment)
FIG. 5 is a diagram illustrating a seat belt device 200 according to the second embodiment. FIG. 5A is an exploded view of the seat belt device 200 corresponding to FIG. The seat belt device 200 includes the first color member 202 and the second color member 204, and thus includes the single color member 122 illustrated in FIG. 2B. Different from the belt device 100.

  Both the first collar member 202 and the second collar member 204 are cylindrical members. First, the first collar member 202 is disposed between the center pillar 116 and the through anchor 108 through the shaft member 120. A groove 208 is provided on the outer peripheral surface 206 of the first collar member 202 on the through anchor side along the outer periphery. Then, the second collar member 204 is disposed so as to cover the first collar member 202.

  FIG. 5B is a view of the second collar member 204 of FIG. 5A viewed from the back side. As illustrated in FIG. 5B, hook portions 212 a to 212 c are provided on the inner peripheral surface 210 of the second collar member 204. These hook portions 212a to 212c protrude toward the groove portion 208 of the first collar member 202 in FIG.

  FIG. 6 is a diagram illustrating each posture of the through anchor 108 corresponding to the BB cross section of FIG. Also in FIG. 6, the X-axis represents the vehicle width direction, and the Y-axis represents the vehicle front-rear direction.

  Fig.6 (a) is BB sectional drawing of Fig.5 (a). As illustrated in FIG. 6A, the hook portions 212 a to 212 c are provided so as to fit into the groove portion 208 in a state where the second collar member 204 is in contact with the through anchor 108. In this state, since the first collar member 202 is in contact with the center pillar 116 and the second collar member 204 is in contact with the through anchor 108, the through anchor 108 is supported and maintains the normal posture.

  Here, the inner diameter D <b> 2 of the second collar member 204 is set to be larger than the outer shape D <b> 3 of the first collar member 202 so that a gap can be formed between the first collar member 202 and the first collar member 202. When the hook portions 212a to 212c are detached from the groove portion 208 from this state, the posture of the through anchor 108 can be changed as shown in FIG.

  FIG. 6B is a diagram illustrating the posture of the through anchor 108 in an emergency. As illustrated in FIG. 6B, when the webbing 104 is strongly pulled by an occupant and a load is generated on the through anchor 108, the second collar member 204 is pressed and the hook portions 212 a to 212 c become the first collar member. 202 is disengaged from the groove 208. Thereby, the posture of the second collar member 204 is inclined with respect to the first collar member 202 and the shaft member 120. Accordingly, the through anchor 108 can be tilted so that the rear end side thereof is separated from the center pillar 116 in the pulling direction of the webbing 104 (downwardly diagonally to the left in the drawing), in other words, the inner side surface 108a is directed in the pulling direction. Become. Also with these configurations, the possibility that the webbing 104 is shifted to the corner of the passage hole 118 is reduced, so that the occurrence of jamming can be suppressed.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings. However, the embodiments described above are preferred examples of the present invention, and other embodiments can be implemented by various methods. Can be carried out. The invention is not limited to the detailed shape, size, configuration, and the like of the components shown in the accompanying drawings unless otherwise specified in the present specification. In addition, expressions and terms used in the present specification are for the purpose of explanation, and are not limited thereto unless otherwise specified.

  Therefore, it is obvious for those skilled in the art that various changes and modifications can be conceived within the scope of the claims, and these naturally belong to the technical scope of the present invention. It is understood.

  INDUSTRIAL APPLICABILITY The present invention can be used for a seat belt device that restrains an occupant to a seat using webbing.

DESCRIPTION OF SYMBOLS 100 * 200 ... Seat belt apparatus, 102 ... Seat, 104 ... Webbing, 106 ... Retractor, 108 ... Through anchor, 108a ... Car interior side surface, 110 ... Anchor plate, 112 ... Tongue plate, 114 ... Buckle, 116 ... Center pillar, 118 ... Passing hole, 119 ... End, 120 ... Shaft member, 122 ... Collar member, 124 ... Inclined surface, 128 ... Bearing hole, 130 ... Mounting hole, 132a, 132b ... Spacer member, 202 ... First collar member, 204 ... First 2 collar members, 206 ... outer peripheral surface, 208 ... groove portion, 210 ... inner peripheral surface, 212a, 212b, 212c ... hook portion

Claims (6)

A seat belt device for restraining an occupant to a seat,
Strip webbing,
A through anchor having a passage hole for passing the webbing;
A shaft member that rotatably attaches the through anchor to the side wall of the vehicle interior in the vehicle front-rear direction,
The through anchor is a bearing hole through which the shaft member passes, and includes a bearing hole including a portion wider than the diameter of the shaft member so that the through anchor is inclined with respect to the side wall as viewed from above the vehicle. ,
The seat belt device is a collar member that is cylindrical and is installed in contact with the side wall and the through anchor through the shaft member, and can be plastically deformed by receiving a load from the through anchor. A seat belt device comprising a collar member.   2. The seat belt device according to claim 1, wherein the through anchor is inclined with respect to the side wall so that a vehicle inner side surface of the through anchor faces in a pulling direction of the webbing by an occupant.   The seat belt device according to claim 1 or 2, wherein the collar member is made of a synthetic resin.   The seat belt device according to any one of claims 1 to 3, wherein the collar member has an inclined surface in which an end portion on the through anchor side is tapered.   The seat belt device according to any one of claims 1 to 4, wherein the through anchor further includes a deformable spacer member that is attached between the bearing hole and the shaft member. A seat belt device for restraining an occupant to a seat,
Strip webbing,
A through anchor having a passage hole for passing the webbing;
A shaft member that rotatably attaches the through anchor to the side wall of the vehicle interior in the vehicle front-rear direction,
The through anchor is a bearing hole through which the shaft member passes, and includes a bearing hole including a portion wider than the diameter of the shaft member so that the through anchor is inclined with respect to the side wall as viewed from above the vehicle. ,
The seat belt device is further cylindrical, and is disposed so as to cover the first collar member, and a first collar member disposed between the side wall and the through anchor through the shaft member. A second collar member,
The first collar member has a groove along the outer periphery,
The second collar member has an inner diameter large enough to form a gap with the first collar member, protrudes toward the groove, and fits into the groove with the second collar member in contact with the through anchor. Having a hook part,
When the second collar member receives a load from the through anchor, the posture of the second collar member can be changed by removing the hook portion from the groove portion.

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