JP2007230335A - Seat belt device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat belt device capable of uniformly constraining both shoulders by a simple configuration, and stably constraining a lower body. <P>SOLUTION: The seat belt device has a three-point type seat belt and a two-point type seat belt which are arranged opposite to each other. An anchor 17 having a guide 171 for guiding a three-point side belt 12 of the three-point type seat belt is provided on a seat or a vehicle body in a fixed manner. A two-point side tongue 24 as a first engagement part is provided on one side of the three-point side belt 12 of the three-point type seat belt. The two-point side tongue 24 is abutted on the guide 171 of the anchor 17 as the three-point side belt 12 of the three-point type seat belt is moved. The two-point side tongue 24 and a two-point side buckle 25 as a second engagement part provided on one end of a two-point side belt 22 of the two-point type seat belt are engaged with each other. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a seat belt device in which a three-point seat belt and a two-point seat belt are arranged.

  Conventionally, seat belts attached to automobiles include a four-point seat belt in which a two-point seat belt is combined with a three-point seat belt in addition to the three-point seat belt. A four-point seat belt is used for a competition vehicle or the like because it has a high holdability at the time of a collision (for example, Patent Documents 1 to 3).

  The 4-point seat belt has a 2-point seat belt on the left and right sides of the 3-point seat belt. The 3-point seat belt webbing and the 2-point seat belt webbing are placed on the passenger chest. And the shoulders are held by the interaction between the webbing of the three-point seat belt and the webbing of the two-point seat belt. As shown in Patent Document 1, the two-point seat belt includes a retractor, a webbing guided by a guide member on one side of the seat, a tongue movably provided on the webbing, and a diagonal position of the guide member, that is, a seat. It is comprised by the buckle apparatus fixed to the other side lower part.

When the occupant wears such a four-point seat belt, the mounting is completed by inserting the tongue of the two-point seat belt into a buckle fixed to the lower part of the other side of the seat after the three-point seat belt is mounted.
Japanese Utility Model Publication No. 62-23755 JP 2004-330975 A US Patent Application Publication No. 2002/89163

  However, since the seat belt devices described in Patent Documents 1 to 3 are provided with the three-point seat belt and the two-point seat belt independently, it is difficult to control the retracting amount of each retractor. There was a problem. In other words, when considering the burden on both shoulders at the time of a collision, it is necessary to equalize the restraining force of the occupant by webbing on the left and right, the difference in structure between the three-point seat belt and the two-point seat belt, For example, there is a problem that it is difficult to adjust the winding amount of each retractor to an optimum value due to differences in the length of the webbing and the support position of the webbing.

  In the three-point seat belt, the shoulder is restrained by the shoulder belt and the lower body is restrained by the lap belt following the shoulder belt. However, even if the retractor's winding is increased in order to improve the restraining force of the lower body, the lap belt cannot be fully wound because it exists downstream of the shoulder belt, and the frictional resistance at the tongue There was a problem that the lower body was not sufficiently restrained compared to the upper body due to the influence of.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a first engagement portion that is provided at one end of a webbing of a three-point seat belt and that abuts against an anchor portion as the webbing moves, and 2 By adopting a configuration in which the second engaging portion provided at one end of the webbing of the point seat belt is engaged, both shoulders can be evenly restrained with a simple construction, and the lower body can be restrained stably. To provide a seat belt device.

  Another object of the present invention is to provide a structure in which the retractor is shared by the three-point seat belt and the two-point seat belt, so that the retractor can be controlled more easily and the number of parts can be reduced. It is to provide a belt device.

  The seat belt device according to the present invention is a seat belt device in which a three-point seat belt and a two-point seat belt are arranged, and can be fixed to a seat or a vehicle body and guides webbing of the three-point seat belt. Provided at one end of a webbing of the three-point seat belt, and a first engaging portion that contacts the anchor part as the webbing moves, and provided at one end of the webbing of the two-point seat belt And a second engagement portion that engages with the first engagement portion.

  The seat belt device according to the present invention is characterized in that the first engaging portion is a tongue (or buckle) and the second engaging portion is a buckle (or tongue).

  The seat belt device according to the present invention includes: a protrusion provided at a position facing the guide portion of the anchor portion; and an opening provided at the first engagement portion and attachable to and detachable from the protrusion. It is further provided with the feature.

  The seat belt device according to the present invention includes a protrusion provided in the first engagement portion, and an opening provided at a position facing the guide portion of the anchor portion and detachable from the protrusion. It is further provided with the feature.

  In the seat belt device according to the present invention, the two-point seat belt is provided on the one side of the seat with a two-point retractor that winds up the webbing, guides the webbing, and moves the second point as the webbing moves. It further comprises a two-point side guide portion that comes into contact with the engaging portion.

  In the seat belt device according to the present invention, the three-point seat belt is provided on the other side of the seat with a three-point retractor that winds up the webbing, and guides the webbing that is wound up by the three-point retractor. A point-side guide portion, a three-point side buckle provided on the vehicle body or the seat on one side of the seat, a three-point side tongue that is movably provided in the middle of the webbing and engages with the three-point side buckle; Is further provided.

  The seat belt device according to the present invention includes a retractor that winds up a webbing that branches in halfway between the webbing of the three-point seat belt and the webbing of the two-point seat belt, and the three-point seat belt includes the seat A three-point guide portion provided on the other side for guiding the webbing of the three-point seat belt, a three-point buckle provided on the vehicle body or the seat on one side of the seat, and movable in the middle of the webbing Further comprising a three-point tongue that engages with the three-point buckle, and the two-point seat belt is provided on one side of the seat and guides the webbing of the two-point seat belt, The apparatus further comprises a two-point guide portion that comes into contact with the second engagement portion as the webbing moves.

  In the present invention, the seat belt device includes a three-point seat belt and a two-point seat belt. An anchor portion having a guide portion for guiding the webbing of the three-point seat belt is provided so as to be fixed to the seat or the vehicle body. The first engaging portion is provided at one end of the webbing of the three-point seat belt. The first engaging portion comes into contact with the anchor portion as the webbing of the three-point seat belt moves. And since this 1st engaging part and the 2nd engaging part provided in the webbing one end of a two-point seat belt are engaged, a two-point seat belt and a three-point seat belt are connected. The lower body of the occupant can also be restrained by winding the webbing with the retractor of the 2-point seat belt, and the occupant is restrained evenly on the left and right by the interaction between the webbing of the 2-point seat belt and the webbing of the 3-point seat belt. It becomes possible to do.

  In the present invention, since the first engaging portion is the tongue and the second engaging portion is the buckle, the webbing of the three-point seat belt and the webbing of the two-point seat belt are caused by the engagement between the tongue and the buckle. Are concatenated. Further, since the first engaging portion is a buckle and the second engaging portion is a tongue, the webbing of the three-point seat belt and the webbing of the two-point seat belt are connected by the engagement between the buckle and the tongue.

  In the present invention, the protruding portion is provided at a position facing the guide portion of the anchor portion. And the opening part which can be attached or detached with respect to this projection part is provided in a 1st engaging part. Since it comprised in this way, when mounting | wearing with a 1st engaging part and an anchor part, these are integrated, and engagement with the 1st engaging part and 2nd engaging part by a passenger | crew becomes easy. In addition, since the opening of the first engagement portion is detachable from the protrusion of the anchor portion, when the winding load of the retractor of the two-point seat belt is operated, the first engagement portion is separated from the anchor portion. Leave and properly restrain the lower body of the occupant.

  In the present invention, the first engaging portion is provided with the protrusion. And the opening part which can be attached or detached with respect to this projection part is provided in the position facing the guide part of an anchor part. Since it comprised in this way, when an anchor part and a 1st engaging part are mounted | worn, these are integrated, and engagement with the 1st engaging part and 2nd engaging part by a passenger | crew becomes easy. Moreover, since the opening part of an anchor part can be attached or detached with respect to the projection part of a 1st engaging part, when the winding load of the retractor of a two-point seat belt operate | moves, a 1st engaging part is from an anchor part. Leave and properly restrain the lower body of the occupant.

  In the present invention, the two-point seat belt includes a two-point side retractor that winds up the webbing, and a two-point side guide portion that guides the webbing and comes into contact with the second engagement portion as the webbing moves. Provided on one side of the sheet. The second engaging portion provided at one end of the webbing of the two-point seat belt engages with the first engaging portion provided on the other side of the seat. Since it comprised in this way, the 2nd engaging part provided in the webbing one end of a 2 point | piece seat belt contact | abuts to the 2 point | side guide part of the sheet | seat one side by winding by a 2 point | side retractor at the time of non-wearing. . On the other hand, at the time of mounting, the second engagement portion engages with the first engagement portion on the other side of the seat.

  In the present invention, the three-point retractor of the three-point seat belt winds up the webbing. The three-point side guide portion is provided on the other side of the sheet and guides the webbing that is wound around the retractor. The three-point side buckle is provided on the vehicle body or the seat on one side of the seat, and engages with a three-point side tongue that is provided so as to be movable during webbing. Further, as described above, since the first engagement portion at one end of the webbing of the three-point seat belt and the second engagement portion at one end of the webbing of the two-point seat belt are engaged, a high restraining force is provided to the occupant. In this case, the three-point seat belt and the two-point seat belt are engaged, the left and right shoulders are restrained equally, and the lower body is also restrained appropriately. On the other hand, when a high restraining force is unnecessary, the engagement is released and restraint only with the three-point seat belt is possible.

  In this invention, the retractor which winds up the webbing branched in the middle between the webbing of the three-point seat belt and the webbing of the two-point seat belt is provided. That is, the retractor of the two-point seat belt and the retractor of the three-point seat belt are made common. The three-point seat belt is provided on the other side of the seat, the three-point side guide portion for guiding the webbing of the three-point seat belt, the three-point side buckle provided on the vehicle body or the seat on one side of the seat, A three-point side tongue that is movably provided during webbing and engages with the three-point side buckle. On the other hand, the two-point seat belt includes a two-point guide portion that is provided on one side of the seat, guides the webbing of the two-point seat belt, and comes into contact with the second engagement portion as the webbing moves. And the 2nd engaging part provided in the webbing one end of a two-point seat belt engages with the 1st engaging part provided in a sheet other side.

  In the present invention, the first engagement portion that comes into contact with the anchor portion as the webbing of the three-point seat belt moves is engaged with the second engagement portion provided at one end of the webbing of the two-point seat belt. Therefore, the lower body of the occupant can be restrained in a balanced manner by the interaction between the winding of the webbing of the two-point seat belt and the winding of the webbing of the three-point seat belt. Further, since the webbing of the two-point seat belt and the webbing of the three-point seat belt are integrally engaged, it is possible to simplify the winding control of each retractor.

  In the present invention, since the first engaging portion is the tongue and the second engaging portion is the buckle, the webbing of the three-point seat belt and the webbing of the two-point seat belt are caused by the engagement between the tongue and the buckle. Are concatenated. Further, since the first engaging portion is a buckle and the second engaging portion is a tongue, the webbing of the three-point seat belt and the webbing of the two-point seat belt are connected by the engagement between the buckle and the tongue. This eliminates the need for the buckle of the two-point seat belt provided on the seat, which has been conventionally required, and makes it possible to reduce the number of parts.

  In the present invention, since the first engaging portion is provided with the opening that can be attached to and detached from the protrusion provided on the anchor portion, when the first engaging portion and the anchor portion are mounted, they are integrated. Therefore, the occupant can easily engage the first engagement portion and the second engagement portion. In addition, since the opening of the first engagement portion is detachable from the protrusion of the anchor portion, when the winding load of the retractor of the two-point seat belt is operated, the first engagement portion is separated from the anchor portion. It is possible to disengage and restrain the passenger's lower body properly.

  In the present invention, since the anchor portion is provided with an opening that can be attached to and detached from the protrusion provided on the first engagement portion, when the anchor portion and the first engagement portion are mounted, they are integrated. The occupant can easily engage the first engagement portion and the second engagement portion. Moreover, since the opening part of an anchor part can be attached or detached with respect to the projection part of a 1st engaging part, when the winding load of the retractor of a two-point seat belt operate | moves, a 1st engaging part is from an anchor part. It is possible to disengage and restrain the passenger's lower body properly.

  In the present invention, since the second engagement portion provided at one end of the webbing of the two-point seat belt is engaged with the first engagement portion provided on the other side of the seat, the two-point seat is not attached. The second engaging portion provided at one end of the webbing of the belt comes into contact with the two-point side guide portion on one side of the sheet by winding by the two-point side retractor. On the other hand, at the time of mounting, the second engagement portion engages with the first engagement portion on the other side of the seat. In this way, the two-point seat belt and the three-point seat belt can be coupled with a simple configuration, and the restraining force can be optimized.

  In the present invention, since the first engaging portion at one end of the webbing of the three-point seat belt and the second engaging portion at one end of the webbing of the two-point seat belt are engaged, a higher restraining force is applied to the occupant. Is provided, the three-point seat belt and the two-point seat belt are engaged, the left and right shoulders are restrained equally, and the lower body is also restrained appropriately. On the other hand, when a high restraining force is unnecessary, the engagement is released and restraint only with the three-point seat belt is possible. Even in this case, the second engagement portion of the two-point seat belt comes into contact with the two-point guide portion by winding by the two-point retractor, and does not hinder getting on and off. Even when the webbing of the three-point seat belt is wound up by the three-point retractor, the first engagement portion abuts on the anchor portion and the movement is hindered. In addition, since the first engaging portion is in contact with the anchor portion before mounting, the occupant can easily grasp the first engaging portion and engage with the second engaging portion even at night. It becomes.

  In the present invention, since the retractor for the two-point seat belt and the retractor for the three-point seat belt are used in common, the number of parts can be reduced. Even in the case of common, the webbing of the two-point seat belt and the webbing of the three-point seat belt are engaged and integrated by the first engagement portion and the second engagement portion. The present invention has an excellent effect that the left and right shoulders can be restrained in a well-balanced manner by a single retractor, and the lower body can be restrained appropriately.

Embodiment 1
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic front view showing a configuration of a seat belt device according to the present invention, and FIG. 2 is a schematic front view showing a state in which an occupant wears a three-point seat belt. As shown in FIG. 1, the seat belt device 100 is disposed on the left side in the seating direction (hereinafter, the other side) opposite to the two-point seat belt 20 disposed on the left side (hereinafter, the one side) in the seating direction. A three-point seat belt 10 is used.

  The three-point seat belt 10 includes a three-point retractor 11 fixed to a B-pillar 3 that is a vehicle body, a webbing (hereinafter referred to as a three-point belt) 12, a three-point guide portion (hereinafter referred to as a shoulder anchor) 13, and three points. The side tongue 14, the anchor portion 17 including the guide portion 171, the three-point side buckle 15, and the three-point side buckle plate 16 are configured. On the other hand, the two-point seat belt 20 includes a two-point retractor 21, a webbing (hereinafter, two-point belt) 22, a two-point guide portion 23, a second engagement portion 25, and a first engagement portion 24. Is done.

  The three-point side retractor 11 is fixed inside the B pillar 3 on the other side, and winds the drawn three-point side belt 12. A shoulder anchor 13 is suspended from the top of the B pillar 3 to guide the extension of the three-point side belt 12 into the vehicle and the winding into the B pillar 3. Note that the three-point retractor 11 may be fixed inside a C pillar (not shown). A first engagement portion 24 is attached to one end of the three-point belt 12. The first engagement portion 24 can use a tongue or a buckle. In the present embodiment, a tongue is applied to the first engagement portion 24, and the first engagement portion 24 will be described as a two-point side tongue 24 below.

  An anchor portion 17 having a guide portion 171 is fixed to the seat cushion 1 or the other lower portion of the vehicle body, and the three-point side belt 12 is provided on the anchor portion 17 fixed to the seat cushion 1. To move. By winding the three-point belt 12 by the three-point retractor 11, the two-point tongue 24 provided at one end of the three-point belt 12 is lowered toward the anchor portion 17, and the three-point belt 12 and the two-point tongue 24. Is lowered when the two-point tongue 24 and the guide portion 171 of the anchor portion 17 contact each other. Between the shoulder anchor 13 and the anchor part 17, a three-point side tongue 14 in which an elongated hole for guiding the three-point side belt 12 is formed is movably provided.

  A three-point buckle plate 16 is fixed to one lower portion of the seat cushion 1 or the vehicle body, and a three-point buckle 15 is connected to the opposite side of the fixed position of the three-point back plate 16. . The three-point side tongue 14 engages with a three-point side buckle 15 provided at the lower part on one side across the seat back 2 from above the other side. A procedure for attaching the three-point seat belt 10 to the occupant M will be described with reference to FIG. The occupant M holds the three-point side tongue 14 suspended from the upper part on the other side of the seat back 2, and moves the three-point side tongue 14 from the right shoulder to the left waist.

  Then, the moved three-point side tongue 14 is engaged with the three-point side buckle 15 fixed by the three-point side buckle plate 16 at the lower part on one side of the seat back 2. As a result, the three-point belt 12 is restrained by the shoulder belt portion 5 that intersects the left waist from the right shoulder of the occupant M, and the lap belt portion 4 that crosses both legs and the lower abdomen from the other side to the one side. Restrain the lower body. In this case, the three-point side retractor 11 sends the three-point side belt 12 into the vehicle via the shoulder anchor 13 by pulling the three-point side tongue 14 of the occupant M. One end of the three-point side belt 12 is moved from the other side to the one side via the guide portion 171 of the anchor portion 17 by pulling the three-point side tongue 14 of the occupant M, and the two-point side tongue 24 is moved to the anchor portion 17. The movement is stopped when it abuts against the guide portion 171. Thereby, the restraint of the occupant M is realized by the three-point support by the shoulder anchor 13 and the anchor portion 17 on the other side and the three-point side buckle 15 on one side.

  As shown in FIG. 1, the two-point retractor 21 of the two-point seat belt 20 is embedded in the seat back 2 and winds up the two-point belt 22. A second engagement portion 25 is provided at one end of the two-point side belt 22, and the second engagement portion 25 is moved to one side of the seat back 2 by winding the two-point side belt 22 of the two-point side retractor 21. It abuts on the two-point guide portion 23 fixed upward. The two-point side guide portion 23 is installed on the seat back 2 such that a rectangular opening that guides the two-point side belt 22 wound inside the seat back 2 or pulled out faces the seating direction. . In the present embodiment, the second engagement portion 25 is described as being a two-point buckle 25. The two-point side buckle 25 is engaged with a two-point side tongue 24 provided at the lower part on the other side of the seat cushion 1. In this case, the two-point side belt 22 is pulled out from the two-point side retractor 21 and sent out to the outside of the seat back 2 via the two-point side guide portion 23.

  FIG. 3 is an enlarged view showing an engagement state between the two-point side tongue 24 and the two-point side buckle 25. The engagement between the two-point side tongue 24 and the two-point side buckle 25 will be described with reference to FIG. The anchor portion 17 is a T-shaped plate and includes a fixing portion 172 and a guide portion 171. The anchor portion 17 is fixed to the vehicle body or the seat cushion 1 by a fixing portion 172 such as a bolt located at a substantially lower center portion of the lower side, and the anchor portion 17 rotates around a predetermined angle about the fixing portion 172. A horizontally long hole-shaped guide portion 171 is formed on the anchor portion 17 and guides the three-point belt 12 to the guide portion 171 so as to be movable. In the present embodiment, the anchor portion 17 is fixed by screwing a fixing portion 172 such as a bolt on the lower side of the seat cushion 1 or the vehicle body, but the anchor portion 17 is fixed as will be described later. You may make it removable from the seat cushion 1 or the other side lower part of a vehicle body.

  The two-point tongue 24 is a T-shaped plate and includes a guide portion 242 and an engagement hole 241. A square-shaped engagement hole 241 is formed at the substantially central portion of the tip of the two-point side tongue 24, and the two-point side tongue 24 is moved in the engagement direction indicated by the white arrow to the two-point side buckle 25. When inserted, the locking portion (not shown) inside the two-point buckle 25 is engaged with the engagement hole 241 and the two-point buckle 25 and the two-point tongue 24 are engaged. By pressing a release button 251 provided on the two-point side buckle 25, the engagement between the lock portion (not shown) and the engagement hole 241 is released, and the engagement between the two-point side buckle 25 and the two-point side tongue 24 is also released. The

  At the position facing the engagement hole 241 of the two-point side tongue 24, a horizontally elongated guide portion 242 is formed. The tip of the three-point side belt 12 is guided to the guide part 171 of the anchor part 17 and the guide part 242 of the two-point side tongue 24, is folded back by the guide part 242, and the tip is sewn to the three-point side belt 12 with a thread. It is inserted or fixed with an adhesive to form a loop connecting the guide portions 242. The guide portion 242 of the two-point side tongue 24 is configured to be the same as or larger than the guide portion 171 of the anchor portion 17. Thereby, even when the three-point side belt 12 is wound, the guide part 242 of the two-point side tongue 24 and the guide part 171 of the anchor part 17 come into contact with each other, and the movement thereof is limited.

  FIG. 4 is a schematic front view showing the configuration of the seat belt device 100 according to the present invention, FIG. 5 is a schematic side view showing the configuration when the seat belt device 100 according to the present invention is viewed from the left side in the occupant M seating direction, FIG. 6 is a schematic side view showing a configuration when the seat belt device 100 according to the present invention is viewed from the right side in the occupant M seating direction. A procedure for further mounting the two-point seat belt 20 after mounting the three-point seat belt 10 shown in FIG. 2 will be described with reference to FIGS.

  The occupant M grips the two-point side buckle 25 at the left shoulder position after the three-point seat belt 10 is worn, and pulls out the two-point side buckle 25 from the left shoulder toward the right waist. The shoulder belt portion 6 of the two-point seat belt 20 crosses the upper portion of the two-point seat belt 20 across the portion 5, and the two-point side buckle 25 is engaged with the two-point side tongue 24. As a result, the two-point seat belt 20 and the three-point seat belt 10 are connected. In this embodiment, the three-point seat belt 10 is attached first, but the two-point seat belt 20 may be attached first.

  Before the occupant M wears the two-point seat belt 20, the two-point buckle 25 is in contact with the two-point side guide portion 23 above the seat back 2 by winding the two-point retractor 21. . When the two-point side buckle 25 is pulled out, the two-point side belt 22 is sent out from the two-point side retractor 21 via the two-point side guide portion 23. The two-point belt 22 guided to the two-point side buckle 25 crosses the shoulder belt portion 5 of the three-point side belt 12 from the left shoulder to the right waist of the occupant M to form the shoulder belt portion 6. The two-point buckle 25 engages with the two-point side tongue 24. In the present embodiment, the example in which the seat belt device 100 is applied to the right seat of the automobile has been described. However, the components of the two-point seat belt 20 and the three-point seat belt 10 are arranged on the opposite sides. Of course, the same applies to the left seat. Furthermore, the same seat belt device 100 may be used for the left and right rear seats.

Embodiment 2
FIG. 7 is a schematic front view showing the configuration of the seat belt device 100 according to the second embodiment. As shown in the drawing, the three-point retractor 11 of the three-point seat belt 10 may be built in the seat back 2, and the three-point side guide portion 33 for guiding the three-point seat belt 10 is not a vehicle body. It may be attached to the seat back 2. The three-point side retractor 11 is embedded in the seat back 2. The three-point retractor 11 and the two-point retractor 21 are respectively embedded in symmetrical positions with a center line L dividing the seat back 2 equally in the vertical direction at the center position. That is, the two-point side retractor 21 and the three-point side retractor 11 are embedded at substantially the same height with a substantially same distance from the center line L.

  In addition, a three-point guide portion 33 is installed at the upper part on the other side of the seat back 2, and guides the three-point belt 12 that is wound up or pulled out from the three-point retractor 11. The three-point side guide portion 33 is installed on the seat back 2 with a rectangular opening for guiding the three-point side belt 12 facing the seating direction. The three-point side guide part 33 and the two-point side guide part 23 are respectively provided at symmetrical positions with the center line L as a boundary. That is, the three-point side guide portion 33 and the two-point side guide portion 23 are installed on the seat back 2 that is substantially the same height and spaced from the center line L by the substantially same distance. By making the winding position, the guide position, and the fixing position symmetrical in this way, it is possible to evenly restrain both the shoulders and the lower half of the occupant M by the interaction with the integrally connected belt. .

  A three-point tongue 14 is provided between the anchor portion 17 and the three-point side guide portion 33 so that the three-point side belt 12 can move. When the three-point seat belt 10 is not attached, the three-point side belt 12 is retracted to a position where the three-point side tongue 14 contacts the three-point side guide portion 33 by winding the three-point side retractor 11. 2 is wound inside. When the three-point seat belt 10 is mounted, the three-point side belt 12 is pulled out from the three-point side retractor 11, and the three-point side tongue 14 is moved from the three-point side guide portion 33 toward the three-point side buckle 15. 2 is crossed and the three-point buckle 15 is engaged.

  FIG. 8 is a schematic front view showing a state in which the occupant M wears the three-point seat belt 10. When the occupant M wears the three-point seat belt 10, the three-point side tongue 14 that contacts the three-point side guide portion 33 is gripped near the right shoulder by winding the three-point side retractor 11. Cross the upper body and move it to the left waist position. Then, the three-point side tongue 14 is engaged with the three-point side buckle 15 fixed by the three-point side buckle plate 16. 9 is a schematic front view showing the configuration of the seat belt device 100 according to the second embodiment, and FIG. 10 is a schematic diagram showing the configuration when the seat belt device 100 according to the second embodiment is viewed from the left side in the occupant M seating direction. FIG. 11 is a schematic side view showing a configuration when the seat belt device 100 according to the second embodiment is viewed from the right side in the occupant M seating direction. A procedure for further mounting the two-point seat belt 20 after mounting the three-point seat belt 10 shown in FIG. 8 will be described with reference to FIGS. 9 to 11.

  The occupant M grips the two-point side buckle 25 at the left shoulder position after the three-point seat belt 10 is worn, and pulls out the two-point side buckle 25 from the left shoulder toward the right waist. The shoulder belt portion 6 of the two-point seat belt 20 crosses the upper portion of the two-point seat belt 20 across the portion 5, and the two-point side buckle 25 is engaged with the two-point side tongue 24. As a result, the two-point seat belt 20 and the three-point seat belt 10 are connected. In this embodiment, the three-point seat belt 10 is attached first, but the two-point seat belt 20 may be attached first. In the present embodiment, the two-point retractor 21 and the three-point retractor 11 are embedded in the seat back 2. However, when the seat belt device 100 is provided in the rear seat or the two-seat vehicle body, the two-point retractor 21 is provided. In addition, the three-point retractor 11 may be installed on the vehicle body provided behind the seat back 2.

  The second embodiment is configured as described above, and the other configurations and operations are the same as those of the first embodiment. Therefore, corresponding parts are denoted by the same reference numerals, and detailed description thereof is omitted.

Embodiment 3
FIG. 12 is a schematic front view showing the configuration of the seat belt device 100 according to the third embodiment. The two-point side retractor 21 and the three-point side retractor 11 shown in FIG. 7 may be a single retractor 41 as shown in FIG. The retractor 41 is embedded in the lower part of the seat back 2 on the center line L, and winds and pulls out the belt 42. One end of the belt 42 is wound around the retractor 41, while the other end is branched into a two-point side belt 22 and a three-point side belt 12 at a branch point 43 in the seat back 2. The belt 42, the two-point side belt 22, and the three-point side belt 12 are branched in a Y shape in the front view in the seat back 2, and the two-point side belt 22 is guided from the branch point 43 to the two-point side guide. The three-point side belt 12 goes from the branch point 43 to the three-point side guide portion 33 toward the portion 23. In the present embodiment, the retractor 41 is embedded in the seat back 2. However, when the seat belt device 100 is provided in the rear seat or the two-seat vehicle body, the retractor 41 is installed in the vehicle body provided behind the seat back 2. What should I do?

  The third embodiment is configured as described above, and the other configurations and operations are the same as those of the first and second embodiments. Therefore, corresponding parts are denoted by the same reference numerals, and detailed description thereof is omitted. To do.

Embodiment 4
FIG. 13 is an enlarged view showing an engagement state between the first engagement portion 24 and the second engagement portion 25 according to the fourth embodiment. As shown in the figure, the first engagement portion 24 may be a two-point side buckle 24 and the second engagement portion 25 may be a two-point side tongue 25. The engagement between the two-point buckle 24 and the two-point tongue 25 will be described with reference to FIG. The two-point side tongue 25 is a T-shaped plate and includes a guide portion 252 and an engagement hole 253. A square-shaped engagement hole 253 is formed at the substantially central portion of the tip of the two-point side tongue 25. When the two-point side tongue 25 is inserted into the two-point side buckle 24, the two-point side buckle is inserted into the engagement hole 253. A lock portion (not shown) inside 24 is engaged, and the two-point buckle 24 and the two-point tongue 25 are engaged.

  By pushing a release button 243 provided on the two-point side buckle 24, the engagement between the lock portion (not shown) and the engagement hole 253 is released, and the engagement between the two-point side buckle 24 and the two-point side tongue 25 is also released. The At the position facing the engagement hole 253 of the two-point side tongue 25, a horizontally elongated guide portion 252 is formed. The tip of the two-point side belt 22 is turned back through the guide portion 252 and stitched with a thread or fixed with an adhesive at an appropriate position to form a loop. The tip of the three-point belt 12 is sandwiched by a two-point buckle 24 through a guide portion 171 of the anchor portion 17.

  The two-point side buckle 24 takes in the tip of the three-point side belt 12 into the inside and is clamped from above and below by a clamping part 244 so as not to fall out. The two-point buckle 24 has a rectangular parallelepiped shape, and the oblong opening area in which the surface area of the rectangular holding portion 244 forms the guide portion 171 of the anchor portion 17 as viewed from the engagement direction indicated by the white arrow in the drawing. It is formed larger. That is, when the three-point side belt 12 is wound, the two-point side buckle 24 moves in the direction of the guide portion 171, and finally, the clamping portion 244 of the two-point side buckle 24 is moved to the guide portion 171 of the anchor portion 17. The movement is restricted by contact.

  The fourth embodiment is configured as described above, and the other configurations and operations are the same as those of the first to third embodiments. Therefore, the corresponding parts are denoted by the same reference numerals and detailed description thereof is omitted. To do.

Embodiment 5
FIG. 14 is an enlarged view showing an engagement state between the two-point tongue 24 and the two-point buckle 25 according to the fifth embodiment, and FIG. 15 is a two-point tongue 24 and the two-point buckle 25 according to the fifth embodiment. It is a typical side view which shows an engagement state. As shown in the figure, the first engagement portion 24 according to Embodiment 5 further includes stop members 245 and 245 provided at one end of the three-point side belt 12. At the position facing the engagement hole 241 of the two-point side tongue 24, a horizontally elongated guide portion 242 is formed. The tip of the three-point side belt 12 is guided to the guide portion 171 of the anchor portion 17 and the guide portion 242 of the two-point side tongue 24 and is folded back by the guide portion 242.

  The tip of the folded three-point belt 12 is overlapped as shown in FIG. 15, and a loop is formed by passing through, for example, a resin stop member 245. The stop member 245 is composed of a bolt 245a and a nut 245b. The bolt 245a is passed through the three-point belt 12 that has been previously formed with a hole having a predetermined diameter, and the bolt 245a after passing is screwed into the nut 245b. The height A of the stopping member 245 in a cross-sectional view is set to be longer than the length B of the guide portion 171 of the anchor portion 17 in the engagement direction (see FIG. 14) indicated by the white arrow.

  When the three-point belt 12 is wound and moves in the direction opposite to the white arrow, the two-point tongue 24 moves accordingly. When the stop members 245 and 245 come into contact with the guide portion 171 of the anchor portion 17, the movement of the two-point side tongue 24 as the first engagement portion 24 is also restricted via the stop members 245 and 245. . Although two stop members 245 and 245 are provided in the present embodiment, one or three or more stop members may be provided. Moreover, although the shape is circular in plan view, it may be oval or rectangular. In this way, the three-point belts 12 and 12 passing through the guide portion 242 of the two-point tongue 24 are screwed through the stop members 245 and 245 formed of resin or the like, and are passed through the stop members 245 and 245. Since the two-point side tongue 24 is brought into contact with the guide portion 171 of the anchor portion 17, the generation of contact noise between the stop members 245 and 245 and the guide portion 171 can be reduced, and a three-point side belt can be used in the event of an accident. It is possible to reduce the impact due to the winding of 12.

  Furthermore, when the seat belt device 100 is not worn in a passenger seat or the like, it is possible to prevent the generation of contact sound when the guide portion 171 of the anchor portion 17 and the guide portion 242 of the two-point side tongue 24 are idling. It becomes possible. As shown in FIG. 13 of the fourth embodiment, when a two-point buckle 24 is used for the first engagement portion 24, a stop member made of a resin rectangular shape is attached to the holding portion 244 of the two-point side buckle 24. You may make it insert.

  The fifth embodiment has the above-described configuration, and the other configurations and operations are the same as those of the first to fourth embodiments. Therefore, the corresponding parts are denoted by the same reference numerals and detailed description thereof is omitted. To do.

Embodiment 6
FIG. 16 is a schematic perspective view showing structures of the anchor portion 17 and the two-point side tongue 24 according to the sixth embodiment. As shown in FIG. 16, the anchor portion 17 is a plate having a hand mirror shape, and includes a fixing portion 172, a flat plate 174, a guide portion 171, and projecting portions 173 and 173. The anchor portion 17 has a rectangular flat plate 174 extending in a direction opposite to the fixed portion 172 with the guide portion 171 as a boundary. Projections 173 and 173 are provided on the flat plate 174 so as to face the guide portion 171. The detailed structure of the protrusions 173 and 173 will be described later.

  The two-point tongue 24 includes an engagement hole 241, a guide portion 242, and openings 246 and 246. The guide part 242 guides the three-point side belt 12 formed narrow at the tip. The lateral width of the oval guide portion 242 is similarly set to be narrow according to the width of the tip of the three-point side belt 12. The three-point side belt 12 passes through the guide portion 171 of the anchor portion 17 and the guide portion 242 of the two-point side tongue 24, is folded back to the opposite side at the guide portion 242, and is sewn and fixed at the sewing portion 121.

  Openings 246 and 246 that can be attached to and detached from the protrusions 173 and 173 are formed on both sides of the guide portion 242 of the two-point side tongue 24. The opening widths of the openings 246 and 246 are W, and are formed into the two-point side tongue 24 up to a predetermined depth in a state where the opening of the opening width W is maintained.

  FIG. 17 is a schematic diagram showing a mounting structure of the anchor portion 17 and the two-point side tongue 24 according to the sixth embodiment. By pushing the openings 246 and 246 of the two-point side tongue 24 in the opposite direction to the protrusions 173 and 173 of the anchor part 17 in the opposite direction of the white arrow shown in the figure, that is, in the opposite direction of the engagement direction, The openings 246 and 246 and the protrusions 173 and 173 are attached, and the attachment of the anchor portion 17 and the two-point side tongue 24 is completed. Then, the two-point buckle 25 is engaged with the integrated two-point side tongue 24.

  In a state where the two-point side tongue 24 and the two-point side buckle 25 are engaged, when the winding of the two-point side belt 22 is performed at a predetermined load or more, the openings 246 and 246 of the two-point side tongue 24 are provided. However, the two-point side buckle 25 and the two-point side tongue 24 that are in the engaged state move in the engagement direction by separating from the protrusions 173 and 173 of the anchor portion 17. On the other hand, when the three-point side belt 12 is wound, the two-point side buckle 25 and the two-point side tongue 24 in the engaged state move to the opposite side in the engagement direction, and the two-point side tongue 24 is anchored. Abutting on the portion 17, the openings 246 and 246 of the two-point side tongue 24 are mounted on the protrusions 173 and 173 of the anchor portion 17, and movement is restricted.

  18 is a schematic side view showing the attachment structure of the anchor portion 17 and the two-point side tongue 24 according to the sixth embodiment, and FIG. 19 is a schematic cross-sectional view showing the attachment structure of the projection 173 and the opening 246. is there. As shown in the drawing, the protrusion 173 includes a nut 173a, a pin 173b, a washer 173c, and a ring 173d. The pin 173b passes through a hole, a washer 173c, a ring 173d, and a nut 173a formed in the flat plate 174 of the anchor portion 17 in this order from the opposite direction in FIG. 17, and is screwed with the nut 173a. A ring 173d made of, for example, resin is inserted between the washer 173c and the nut 173a to prevent easy detachment from the projections 173 and 173 of the openings 246 and 246.

  The openings 246 and 246 are mounted around the ring 173d fitted between the washer 173c and the nut 173a of the protrusions 173 and 173 formed as described above. As shown in FIG. 19, when the diameter of the pin 173b is φ1 and the outer diameter of the ring 173d is φ2, the opening width W of the opening 246 is larger than the diameter φ1 of the pin 173b and the outer diameter of the ring 173d is larger than φ2. Is preferably set to a small value. By setting the opening width W to an optimum value in this way, easy separation of the openings 246 and 246 from the protrusions 173 and 173 can be prevented. In FIGS. 16 and 17, the description of the nut 173a, the pin 173b, the washer 173c, and the ring 173d constituting the protrusion 173 is omitted for easy explanation.

  In the present embodiment, the protruding portion 173 includes the nut 173a, the pin 173b, the washer 173c, and the ring 173d. However, the present invention is not limited to this configuration. For example, the protruding portion 173 is formed on the flat plate 174 of the anchor portion 17. 173 may be vertically formed, and the openings 246 and 246 may be attached to and detached from this, and a non-slip member made of resin may be provided around the opening 246. Further, in the present embodiment, the two protrusions 173 and 173 and the openings 246 and 246 are provided, but one or three or more of these may be formed.

  The sixth embodiment has the above-described configuration, and the other configurations and operations are the same as those of the first to fifth embodiments. Therefore, the corresponding parts are denoted by the same reference numerals and detailed description thereof is omitted. To do.

Embodiment 7
The seventh embodiment relates to a mode in which the opening portions 173 and 173 are provided in the anchor portion 17 and the projection portions 246 and 246 are provided in the two-point side tongue 24. FIG. 20 is a schematic perspective view showing structures of the anchor portion 17 and the two-point side tongue 24 according to the seventh embodiment. As shown in FIG. 17, the anchor portion 17 is a plate having a hand mirror shape, and includes a fixing portion 172, a flat plate 174, a guide portion 171, and openings 173 and 173. The anchor portion 17 has a rectangular flat plate 174 extending in a direction opposite to the fixed portion 172 with the guide portion 171 as a boundary. Openings 173 and 173 are formed on the flat plate 174 at positions facing the guide portion 171. The openings 173 and 173 are formed with the openings facing the guide 171. The opening width of the openings 173 and 173 is W. The openings 173 and 173 are formed toward the inside of the flat plate 174 of the anchor portion 17 to a predetermined depth while maintaining an opening having an opening width W.

  The two-point tongue 24 includes an engagement hole 241, a guide part 242, and projecting parts 246 and 246. The guide part 242 guides the three-point side belt 12 formed narrow at the tip. The lateral width of the oval guide portion 242 is similarly set to be narrow according to the width of the tip of the three-point side belt 12. The three-point side belt 12 passes through the guide portion 171 of the anchor portion 17 and the guide portion 242 of the two-point side tongue 24, is folded back to the opposite side at the guide portion 242, and is sewn and fixed at the sewing portion 121. Protrusions 246 and 246 are formed on both sides of the guide portion 242 on the back surface of the two-point tongue 24. Note that the shape and size of the protrusions 246 and 246 are the same as those in the sixth embodiment, and a detailed description thereof will be omitted.

  FIG. 21 is a schematic diagram showing a mounting structure of the anchor portion 17 and the two-point side tongue 24 according to the seventh embodiment. The protrusions 246 and 246 on the back surface of the two-point tongue 24 are positioned opposite to the openings 173 and 173 formed in the anchor portion 17, respectively, in the opposite direction of the white arrow shown in the drawing, that is, on the opposite side in the engagement direction. The projections 246 and 246 and the openings 173 and 173 are attached by pushing in, and the attachment between the anchor part 17 and the two-point side tongue 24 is completed. Then, the two-point buckle 25 is engaged with the integrated two-point side tongue 24.

  When the two-point side tongue 22 and the two-point side buckle 25 are engaged with each other, when the two-point side belt 22 is wound at a predetermined load or more, the projections 246 and 246 of the two-point side tongue 24 are provided. However, the two-point side buckle 25 and the two-point side tongue 24 that are in the engaged state move in the engagement direction by separating from the openings 173 and 173 of the anchor portion 17. On the other hand, when the three-point side belt 12 is wound, the two-point side buckle 25 and the two-point side tongue 24 in the engaged state move to the opposite side in the engagement direction, and the two-point side tongue 24 is anchored. The protrusions 246 and 246 on the back surface of the two-point side tongue 24 are attached to the openings 173 and 173 of the anchor portion 17 so that the movement is restricted.

  The seventh embodiment has the above-described configuration, and the other configurations and operations are the same as those of the first to sixth embodiments. Therefore, the corresponding parts are denoted by the same reference numerals and detailed description thereof is omitted. To do.

Embodiment 8
FIG. 22 is a schematic diagram showing an engagement state between the two-point side buckle 24 and the two-point side tongue 25 according to the eighth embodiment. As shown in the figure, the first engagement portion 24 may be a two-point side buckle 24 and the second engagement portion 25 may be a two-point side tongue 25. The engagement between the two-point side buckle 24 and the two-point side tongue 25 will be described with reference to FIG. The two-point side tongue 25 is a T-shaped plate and includes a guide portion 252 and an engagement hole 253. A square-shaped engagement hole 253 is formed at the substantially central portion of the tip of the two-point side tongue 25. When the two-point side tongue 25 is inserted into the two-point side buckle 24, the two-point side buckle is inserted into the engagement hole 253. A lock portion (not shown) inside 24 is engaged, and the two-point buckle 24 and the two-point tongue 25 are engaged.

  On the opposite side of the two-point side buckle 24 in the engaging direction, a joining piece 247 having a guide portion 242 and openings 246 and 246 is sandwiched in the vertical direction by the two-point side buckle 24. The joining piece 247 has substantially the same configuration as one end of the two-point side tongue 24 described in the sixth embodiment, and is sandwiched and fixed by the two-point side buckle 24 at a position facing the guide portion 242. Openings 246 and 246 are formed with an opening width W such that the opening of the joining piece 247 faces the opposite side in the engagement direction. Protrusions 173 and 173 are provided on the flat plate 174 of the anchor portion 17 so as to be detachable from the openings 246 and 246.

  Openings 246 and 246 formed in the joining piece 247 sandwiched by the two-point buckle 24 are formed on the protrusions 173 and 173 formed on the anchor portion 17 in the direction opposite to the white arrow shown in the drawing, that is, in the engagement direction. By pushing in the opposite side, the openings 246 and 246 and the projections 173 and 173 are attached, and the attachment of the anchor part 17 and the two-point side buckle 24 is completed. Then, the two-point side tongue 25 is engaged with the integrated two-point side buckle 24.

  In the state where the two-point tongue 25 and the two-point buckle 24 are engaged, when the winding of the two-point belt 22 is performed at a predetermined load or more, the openings 246 and 246 of the two-point buckle 24 are used. However, the two-point side buckle 24 and the two-point side tongue 25 that are in the engaged state move in the engagement direction by separating from the protrusions 173 and 173 of the anchor portion 17. On the other hand, when the three-point side belt 12 is wound, the two-point side buckle 24 and the two-point side tongue 25 in the engaged state move to the opposite side in the engagement direction, and the two-point side buckle 24 is joined. The piece 247 comes into contact with the anchor portion 17, and the openings 246 and 246 of the joining piece 247 of the two-point side buckle 24 are attached to the projecting portions 173 and 173 of the anchor portion 17, and movement is restricted. In the present embodiment, the openings 246 and 246 are formed in the joint piece 247 of the two-point side buckle 24, and the protrusions 173 and 173 are provided in the anchor portion 17. However, FIG. As shown in the figure, the protrusions 246 and 246 may be formed on the back surface of the joining piece 247 of the two-point side buckle 24, and the openings 173 and 173 may be provided in the anchor portion 17.

  The eighth embodiment is configured as described above, and the other configurations and operations are the same as those of the first to seventh embodiments. Therefore, the corresponding parts are denoted by the same reference numerals and detailed description thereof is omitted. To do.

Embodiment 9
FIG. 23 is an enlarged view showing an engagement state between the two-point side tongue 24 and the two-point side buckle 25 according to the ninth embodiment. As shown in FIG. 23, the anchor portion 17 may be detachable from the vehicle body or the seat cushion 1. The anchor portion 17 is a T-shaped plate and includes a guide portion 171 and an engagement hole 175. A square-shaped engagement hole 175 is formed at the center of the tip of the anchor portion 17. A laterally long guide part 171 is formed at a position facing the engagement hole 175, and guides the three-point belt 12 to the guide part 171 so as to be movable. The three-point belt 12 passes through the guide portion 171 and is turned back through the guide portion 242 of the two-point side tongue 24, and is stitched with a thread or fixed with an adhesive at an appropriate position to form a loop.

  A fixing buckle 176 is provided on the other side surface of the seat cushion 1. The fixing buckle 176 includes a release button 177, a fixing portion 172, and a fixing piece 178. The fixing buckle 176 has a rectangular parallelepiped housing, and holds the fixing piece 178 in the vertical direction. The fixing portion 172 such as a bolt penetrates the fixing piece 178 from the other side of the seat cushion 1 toward the one side at the lower central portion of the fixing piece 178, and fixes the fixing piece 178 to the seat cushion 1. The fixing buckle 176 rotates about a predetermined angle about the fixing portion 172.

  When the anchor portion 17 is moved in the opposite direction of the engagement direction, that is, in the opposite direction of the white arrow and inserted into the fixing buckle 176, a locking portion (not shown) inside the fixing buckle 176 is engaged with the engagement hole 175, and the anchor portion 17 is engaged. And the fixing buckle 176 are engaged, and the anchor portion 17 is detachably fixed to the seat cushion 1 via the fixing buckle 176.

  By pushing a release button 177 provided on the fixing buckle 176, the engagement between the lock portion (not shown) and the engagement hole 175 is released, and the engagement between the anchor portion 17 and the fixing buckle 176 is also released.

  FIG. 24 is a schematic front view showing the configuration of the seat belt device 100 according to the ninth embodiment. FIG. 24 shows a state in which all the engagement of the seat belt device 100 is released, and the three-point side belt 12 is wound up by the three-point side retractor 11. The two-point side tongue 24, the anchor portion 17, and the three-point side tongue 14 are suspended above the other side of the seat back 2 in order from the tip of the three-point side belt 12. The occupant M grasps the two-point side tongue 24, the anchor portion 17 or the three-point side tongue 14, and fixes the anchor portion 17 to the fixing buckle 176, the three-point side tongue 14 to the three-point side buckle 15, and the two-point side tongue. The engagement of the seat belt device 100 is completed by engaging the 24 with the two-point side buckle 25. Thus, when the three-point belt 10 is not attached, the two-point side tongue 24, the anchor portion 17 and the three-point side tongue 14 are suspended above the seat back 2 other side as shown in FIG. The occupant M can easily get on and off.

  The ninth embodiment is configured as described above, and the other configurations and operations are the same as those of the first to eighth embodiments. Therefore, the corresponding parts are denoted by the same reference numerals and detailed description thereof is omitted. To do.

It is a typical front view which shows the structure of the seatbelt apparatus which concerns on this invention. FIG. 3 is a schematic front view showing a state in which an occupant wears a three-point seat belt. It is an enlarged view which shows the engagement state of a 2-point side tongue and a 2-point side buckle. It is a typical front view which shows the structure of the seatbelt apparatus which concerns on this invention. It is a typical side view showing composition at the time of seeing a seat belt device concerning the present invention from a crew member seating direction left side. It is a typical side view showing composition at the time of seeing a seat belt device concerning the present invention from a crew member seating direction right side. FIG. 6 is a schematic front view showing a configuration of a seat belt device according to a second embodiment. FIG. 3 is a schematic front view showing a state in which an occupant wears a three-point seat belt. FIG. 6 is a schematic front view showing a configuration of a seat belt device according to a second embodiment. It is a typical side view which shows the structure at the time of seeing the seatbelt apparatus which concerns on Embodiment 2 from a passenger | crew seating direction left side. It is a typical side view which shows the structure at the time of seeing the seatbelt apparatus which concerns on Embodiment 2 from a passenger | crew seating direction right side. FIG. 6 is a schematic front view showing a configuration of a seat belt device according to a third embodiment. It is an enlarged view which shows the engagement state of the 1st engaging part which concerns on Embodiment 4, and a 2nd engaging part. FIG. 9 is an enlarged view showing an engagement state between a two-point side tongue and a two-point side buckle according to a fifth embodiment. FIG. 10 is a schematic side view showing an engagement state between a two-point side tongue and a two-point side buckle according to a fifth embodiment. It is a typical perspective view which shows the structure of the anchor part which concerns on Embodiment 6, and a two-point side tongue. It is a schematic diagram which shows the attachment structure of the anchor part which concerns on Embodiment 6, and a 2-point side tongue. It is a schematic diagram side view which shows the attachment structure of the anchor part which concerns on Embodiment 6, and a 2-point side tongue. It is a typical cross-sectional view which shows the attachment structure of a projection part and an opening part. It is a typical perspective view which shows the structure of the anchor part which concerns on Embodiment 7, and a 2-point side tongue. It is a schematic diagram which shows the attachment structure of the anchor part which concerns on Embodiment 7, and a two-point side tongue. FIG. 10 is a schematic diagram showing an engagement state between a two-point buckle and a two-point tongue according to an eighth embodiment. FIG. 38 is an enlarged view showing an engagement state between a two-point side tongue and a two-point side buckle according to a ninth embodiment. FIG. 10 is a schematic front view illustrating a configuration of a seat belt device according to a ninth embodiment.

Explanation of symbols

1 Seat cushion 2 Seat back 3 B pillar (vehicle body)
10 3-point seat belt 11 3-point retractor 12 3-point belt (webbing)
13 Shoulder anchor (3-point guide)
14 3 point side tongue 15 3 point side buckle 16 3 point side buckle plate 17 Anchor part 20 2 point type seat belt 21 2 point side retractor 22 2 point side belt (webbing)
23 2 point side guide part 24 2 point side tongue, 2 point side buckle (1st engaging part)
25 2-point side buckle, 2-point side tongue (second engagement part)
33 Three-point side guide part 41 Retractor 100 Seat belt device 171 Guide part 173 Projection part (opening part)
245 Stop member 246 Opening (projection)
M Crew

Claims (7)

In a seat belt device in which a three-point seat belt and a two-point seat belt are arranged,
An anchor portion that can be fixed to a seat or a vehicle body and has a guide portion that guides webbing of the three-point seat belt;
A first engagement portion that is provided at one end of the webbing of the three-point seat belt and abuts against the anchor portion as the webbing moves;
A seat belt device comprising: a second engagement portion that is provided at one end of the webbing of the two-point seat belt and engages with the first engagement portion. The seat belt device according to claim 1, wherein the first engaging portion is a tongue (or buckle), and the second engaging portion is a buckle (or tongue). A protrusion provided at a position facing the guide portion of the anchor portion;
The seat belt device according to claim 1, further comprising: an opening provided in the first engagement portion and attachable to and detachable from the protrusion. A protrusion provided on the first engagement portion;
The seatbelt device according to claim 1, further comprising: an opening provided at a position of the anchor portion facing the guide portion and detachable from the protrusion. The two-point seat belt is
A two-point retractor for winding the webbing;
5. A two-point guide portion provided on one side of the sheet, guiding the webbing, and abutting on the second engagement portion as the webbing moves. 5. The seatbelt apparatus as described in any one. The three-point seat belt is
A 3-point retractor for winding the webbing,
A three-point guide portion that is provided on the other side of the sheet and guides the webbing wound by the three-point retractor;
A three-point buckle provided on the vehicle body or seat on one side of the seat;
The seatbelt device according to any one of claims 1 to 5, further comprising: a three-point side tongue that is movably provided in the middle of the webbing and engages with the three-point side buckle. A retractor that winds up the webbing that branches in halfway between the webbing of the three-point seat belt and the webbing of the two-point seat belt;
The three-point seat belt is
A three-point guide portion provided on the other side of the seat for guiding the webbing of the three-point seat belt;
A three-point buckle provided on the vehicle body or seat on one side of the seat;
A three-point tongue that is movably provided in the middle of the webbing and engages with the three-point buckle;
The two-point seat belt is
A two-point side guide portion provided on one side of the seat, guiding a webbing of the two-point seat belt, and abutting on the second engagement portion as the webbing moves. Item 5. The seat belt device according to any one of Items 1 to 4.

Images