JP2009280028A - Four-point seat belt device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat belt device having favorable operability and favorably constraining the chest part and the lumbar part. <P>SOLUTION: (1) This seat belt device 10 for vehicles is provided with: an X-type shoulder belt 11 that includes a first shoulder belt 12 extending between a vehicle outside upper part and a vehicle inside lower part, and a second shoulder belt 13 extending between the vehicle inside upper part and the vehicle outside lower part; a lap belt 14; a tongue plate 25; a first belt winding device 20 connected to the first shoulder belt; elastic guides 30 and 31 for springing up the second shoulder belt 13; and a holding means 40 holding the tongue plate 25 provided at a roof 2 located in a front upward a seating occupant inside the vehicle. (2) This seat belt device has a slip joint 22 supporting the belt at the vehicle inside lower part. (3) this seat belt device has an anchor 23 where the belt is fixed at the vehicle inside lower part. (4) This seat belt device has a holding means 40 holding the tongue plate 25 when releasing the worn belt. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a four-point seat belt device for a vehicle that has good detachability and is sufficiently restrained on an occupant's chest and waist during a frontal collision of the vehicle.

Patent Documents 1 and 2 disclose a vehicle four-point seat belt device that can be mounted with one hand.
JP 2007-191107 A JP 2007-191108 A

The vehicle seat belt devices of Patent Documents 1 and 2 have the following problems to be solved.
(I) The operation amount for attaching the belt increases, which is troublesome.
More specifically, (a) the operation of passing the shoulder on one side of the belt, (b) gripping the tongue plate and pulling it obliquely downward in front of the occupant, the belt is pulled out of the retractor, and the tongue plate buckle on the side of the seat cushion (C) An operation to move the engaged tongue plate and buckle to the center of the lap belt is necessary, and the above-described (a), ( The operation of c) increases and is troublesome.
(Ii) The restraint of the occupant's chest and waist by the seat belt at the time of frontal collision and side collision of the vehicle tends to be weak.
More details
・ Because the shoulder belt is V-shaped when the belt is attached, the belt does not cross in an X-shape in front of the chest, and the chest restraint is weak at the time of a front collision.
・ When a load is applied to the shoulder belt from the occupant during the frontal collision, the lap belt is pulled by the shoulder belt and stretches and rises, the lap belt moves away from the waist, and the restraint by the lap belt becomes weak, and the front of the waist It is necessary to prevent movement and submarine (submarine).

  The object of the present invention is to make the operability of the belt better than the conventional three-point seat belt and the four-point seat belt, and to restrain the occupant's chest and waist at the time of the front collision, and is a four-point system for vehicles. To provide a seat belt device.

The four-point seat belt device for a vehicle of the present invention that solves the above problems or achieves the above object is as follows.
(1) An X-type shoulder belt including a first shoulder belt extending between the vehicle outer upper portion and the vehicle inner lower portion when the belt is attached and a second shoulder belt extending between the vehicle inner upper portion and the vehicle outer lower portion when the belt is attached. And a second shoulder belt or a lap belt connected to the first and second shoulder belts, and a buckle which is slidable on a belt portion including the second shoulder belt and the lap belt and which is provided outside the vehicle. A detachable tongue plate, and a belt winding device connected to the first shoulder belt,
When the belt is released, the vehicle has a four-point type equipped with a moving means for moving the first shoulder belt together with the tongue plate and the second shoulder belt toward the front upper side of the seated occupant and toward the roof inside the vehicle. Seat belt device.
(2) The moving means allows the second shoulder belt to pass under the first shoulder belt, or allows the first and second shoulder belts to be slidable or within a predetermined range. The four-point seat belt device for vehicles according to (1), which is a guide that is locked so as to be relatively movable.
(3) The vehicle according to (2), wherein the guide is configured such that when the belt is released, the first shoulder belt can be automatically flipped upward together with the tongue plate and the second shoulder belt. 4-point seat belt device.
(4) The vehicle four-point system according to (3), wherein the guide is configured to be able to be flipped up by any one of an elastic force of the guide itself, a biasing force by a spring, and a driving force by a driving device such as a motor. Seat belt device.
(5) The apparatus according to any one of (1) to (4), further comprising holding means that is provided on the front upper side of the seated occupant and on the roof inside the vehicle, and holds the tongue plate or a belt portion near the tongue plate when the belt is released. The four-point seat belt device for a vehicle according to any one of the above.
(6) The vehicle four-point seat belt device according to (5), wherein the holding means is capable of adjusting a holding position of the tongue plate or a belt portion in the vicinity of the tongue plate in a vehicle front-rear direction.
The configurations of (1) to (6) are common to the first and second embodiments.

(7) The four-point seat belt device for a vehicle according to any one of (1) to (6), further including a slip joint that slidably supports a belt portion including the first shoulder belt and a lap belt. .
The configuration (7) is applied to the first embodiment.

(8) Any one of (1) to (6), further including an anchor to which the first shoulder belt and the lap belt are fixed, and a second belt winding device connected to the second shoulder belt. 4. The four-point seat belt device for vehicles according to the above.
The configuration (8) is applied to the second embodiment.

  According to the vehicle four-point seat belt device of (1) above, since the first shoulder belt and the second shoulder belt are X-shaped when the belt is worn, the restraint on the chest of the occupant at the time of the front collision is conventional. Improve over technology. Further, since the second shoulder belt or the first and second shoulder belts are connected to the lap belt, the shoulder belt pulls the lap belt when the load from the occupant is applied to the shoulder belt at the time of the front collision, and the lap belt It is pulled in the direction of biting into the waist. Therefore, the lap belt does not float from the waist, and the restraint of the waist by the lap belt is improved.

  Further, when the belt is mounted, it is only necessary to hold the tongue plate, move it downward and engage it with the buckle. Compared to the four-point seat belt devices of Patent Documents 1 and 2, it is not necessary to pass a shoulder through the belt, and it is not necessary to move the buckle to the center of the lap belt. In addition, the belt can be attached only by pulling the tongue plate downward, so that the upper body is twisted to grab the tongue plate at the rear and pull the tongue plate diagonally forward and downward as in the conventional three-point seat belt device. There is no need, and the belt mounting operation is easy.

  In addition, when the belt is released, the tongue plate and the second shoulder belt are lifted up together with the first shoulder belt by the moving means, and the belt is released. Thus, the operability of the belt for releasing the belt is improved.

  According to the vehicle four-point seat belt device of (2) above, when the belt is released, the moving means moves the first shoulder belt together with the tongue plate and the second shoulder belt above the seated occupant and inside the vehicle. The second shoulder belt is passed through the lower side of the first shoulder belt (occupant side from the first shoulder belt), or the first and second shoulder belts are connected to each other. It also serves as a guide that is slidably or relatively movable within a predetermined range.

  According to the vehicle four-point seat belt device of (3) above, since the guide is configured to be automatically raised, the operability of the belt when the belt is released is improved.

  The (4) four-point vehicle seat belt device is configured to be able to be flipped up by any one of the elastic force of the guide itself, the urging force of a spring, and the driving force of a driving device such as a motor. In the case of the elastic force of the guide itself, the guide is constituted by an elastic resin guide through which the second shoulder belt is slidably inserted, and the guide is attached to the roof or the seat back upper end. When the belt is worn, the guide restrains the occupant from the inner shoulder of the occupant to the chest. When the belt is released, the guide springs up the shoulder belt and tongue plate with its own elasticity. In the case of the elastic guide, there is no need to provide a special jumping means other than the guide, and there is an advantage that the structure is simple and the number of parts is small. The elastic force of the elastic guide may be replaced with a structure in which the guide is rotated up and down around the mounting portion and is rotated by a spring added to the guide, a motor that rotates the guide, or the like. . In the case of a spring added to the guide, a structure (turnover mechanism) in which the upward rotational force by the spring is increased when the guide is lifted halfway. In this case, there is an advantage that even if the guide is lifted halfway and released, the guide is lifted by the spring force. Moreover, when using a motor, there exists an advantage that a passenger | crew's operating force is not required for the lift of a guide.

  According to the four-point vehicle seat belt device of (5) above, there is provided holding means that is provided on the roof in front of the seated occupant and holds the tongue plate or the belt portion in the vicinity of the tongue plate when the belt is released. Therefore, when the belt is mounted, it is only necessary to hold the tongue plate, move it downward and engage it with the buckle. Compared to the four-point seat belt devices of Patent Documents 1 and 2, it is not necessary to pass a shoulder through the belt, and it is not necessary to move the buckle to the center of the lap belt. In addition, the belt can be attached simply by removing the tongue plate from the holding means and pulling it vertically downward, so there is no need to pull the tongue plate obliquely downward, unlike the conventional three-point seat belt device. Is easy.

  According to the vehicle four-point seat belt device of the above (6), the holding means can adjust the holding position of the tongue plate or the belt portion in the vicinity of the tongue plate in the vehicle front-rear direction. By setting the position to the rear position, the holding means does not get out of the way of the occupant's visual range, and when releasing the mounting, the holding position is set to the front position, so that the tongue plate can be easily held and released from the holding means. Become.

  According to the vehicle four-point seat belt device of (7), the vehicle further includes a slip joint (or a slip joint combined tongue plate) that slidably supports the belt portion including the first shoulder belt and the lap belt. Therefore, the first and second shoulder belts and the lap belt can be wound only by the first belt winding device, and the second belt winding device for winding the lap belt and the second shoulder belt is provided. Can be abolished. However, a second belt winding device may be provided. When the slip joint tongue plate is used, the shoulder belt and the lap belt can be separated from the lower side of the vehicle for a special purpose.

  According to the vehicle four-point seat belt device of the above (8), the first shoulder belt and the lap belt are fixed to the anchor (joint that supports the belt so that it cannot slide), and the second shoulder belt is connected. Furthermore, since the second belt winding device is further provided, the winding of the first and second shoulder belts and the lap belt is quick.

Below, the four-point seatbelt apparatus for vehicles of this invention is demonstrated with reference to FIGS. In the figure, FR indicates the front of the vehicle, OUT indicates the outside of the vehicle, and UP indicates the upper side.
The present invention includes a first embodiment in which a belt is supported by a slip joint (including a slip joint and tongue plate) at a lower portion inside the vehicle, and a second embodiment in which a belt is anchored at a lower portion inside the vehicle.
1 to 11 show a configuration according to Embodiment 1 of the present invention. 1 to 11 are applicable to the second embodiment of the present invention except for the slip joint portion. FIG. 12 shows a configuration according to Embodiment 2 of the present invention.
Components common to the first and second embodiments of the present invention are denoted by the same reference numerals throughout the first and second embodiments of the present invention.

[Example 1]
First, a vehicle four-point seat belt device according to a first embodiment of the present invention will be described with reference to FIGS. Although the figure shows a case where the seat is a driver's seat, the seat may be a passenger seat or a rear seat.

  The four-point seat belt device 10 for a vehicle according to the present invention includes a first shoulder belt 12 extending between a vehicle outer upper portion and a vehicle inner lower portion when the belt is worn, and a vehicle inner upper portion (the seat back inner upper portion or the seat back) when the belt is worn. An X-type shoulder belt 11 including a second shoulder belt 13 extending between an upper portion on the inner upper portion and a lower portion on the outer side of the vehicle, and the second shoulder belt 13 or the first and second shoulder belts 12 and 13. A connected lap belt 14, a tongue plate 25 slidable on a belt portion including the second shoulder belt 13 and the lap belt 14 and detachable from a buckle 26 provided outside the vehicle, and a first shoulder belt The first belt winding device 20 is connected to the first shoulder belt 12 so that the first shoulder belt 12 can be wound.

  The vehicle four-point seat belt device 10 of the present invention may include a second belt winding device 21 that is connected to the second shoulder belt 13 so as to be able to wind the second shoulder belt 13. . The second belt winding device 21 may or may not be provided in the first embodiment, but needs to be provided in the second embodiment.

  In the above, the vehicle outer upper portion, the vehicle outer lower portion, the vehicle inner upper portion, and the vehicle inner lower portion refer to positions relative to the seat 1 or the seated occupant. The vehicle outer upper portion is, for example, a shoulder anchor 24 that slidably supports a belt on the vehicle outer upper portion. The vehicle inner lower portion is, for example, a slip joint 22 (or a slip joint 22 tongue plate instead of the slip joint 22 in the vehicle inner lower portion) or an anchor 23 that supports the belt in a non-slidable manner. The vehicle outer lower portion is, for example, a vehicle outer lower tongue plate 25 and a vehicle outer lower buckle 26 attached to and detached from the tongue plate 25. The vehicle inner upper portion is, for example, a shoulder anchor 27 that slidably supports a belt attached to a seat back 1a on the vehicle inner upper portion, or a shoulder that slidably supports a belt provided on the roof on the vehicle inner upper portion. Anchor 28. The seat belt device 10 of the present invention is a four-point seat belt device, which includes a shoulder anchor 24 at the upper outer side of the vehicle, a slip joint 22 or anchor 23 at the lower inner side of the vehicle, a tongue plate 25 and a buckle 26 at the lower outer side of the vehicle, The shoulder anchors 27 or 28 constitute four points of the four-point seat belt.

  The four-point seat belt device 10 for a vehicle further directs the first shoulder belt 12 together with the tongue plate 25 and the second shoulder belt 13 toward the front upper part of the seated occupant and the roof portion inside the vehicle when the belt is released. Moving means for enabling movement.

The moving means allows the second shoulder belt 13 to pass under the first shoulder belt 12, or allows the first and second shoulder belts 12 and 13 to slide relative to each other or within a predetermined range. It consists of a guide 30 or 31 that can be locked.
The guide 30 or 31 is slidable on the second shoulder belt 13 (for example, the second shoulder belt 13 is slidably passed), and when the belt is released, the second shoulder belt 13 is inserted into the tongue plate 25 and the first shoulder belt 13. It is lifted up together with 1 shoulder belt 12. Of the guides 30 or 31, the guide 30 is attached to the seat back 1a, and the guide 31 is attached to the roof 2. The guides 30 and 31 may be made of a flexible elastic member such as a resin. The illustrated example shows a case where the guides 30 and 31 are made of elastic guides 30 and 31, but the guides 30 and 31 are not limited to elastic guides.

  The guides 30 and 31 are mounted so as to be pivotable around the rear end of the vehicle, and are configured to be pivotable in the vertical direction by a driving device such as a motor, or configured to be biased upward by a spring. In this case, the guides 30 and 31 themselves may not have elasticity (however, it is preferable to have elasticity). When the guides 30 and 31 are urged upward by a spring, it is preferable to adopt a structure (for example, a turnover mechanism) in which the upward rotational force by the spring increases when the guide is lifted to a midway position.

  The vehicle four-point seat belt device 10 is further provided on the roof 2 portion located in front of the seated occupant and on the inner side of the vehicle. When the belt is released, the tongue plate 25 at the lower portion outside the vehicle or in the vicinity of the tongue plate 25 is provided. Holding means 40 for holding the belt portion (the portion including the second shoulder belt 13 and the lap belt 14).

Each component of the vehicle four-point seat belt device 10 will be described in more detail.
In the illustrated example, the first and second belt winding devices 20 and 21 are each made of a retractor. However, the present invention is not limited to the retractor. That is, each belt winding device of the first and second belt winding devices 20 and 21 includes a retractor, a belt winding motor, a retractor or a belt winding device, a force limiter and / or a pre-limiter. You may comprise from the apparatus provided with the tensioner. A retractor, a belt take-up motor, a force limiter, a pretensioner, and a combination device thereof used in the present invention are respectively a conventionally known retractor, a belt take-up motor, a force limiter, a pretensioner, and a combination device thereof. Can be used.

  The first winding device 20 is provided in the closed cross section of the pillar at the lower end portion of the pillar. A belt portion constituting a part of the first shoulder belt 12 enters the pillar from a shoulder anchor 24 provided on the upper end of the pillar and extends from the upper part to the lower part in the pillar. Connected to the take-off device 20.

  The second winding device 21 is provided on the seat back 1 a as shown in FIGS. 1 to 4 or on the roof 2 as shown in FIGS. 5 and 6.

  When the second winding device 21 is provided on the seat back 1a, as shown in FIGS. 1 to 4, the second shoulder belt 13 slides on the shoulder anchor 27 provided at the upper end of the seat back 1a. It is freely inserted into the seat back 1a, extends downward, and is connected to the second winding device 21.

  When the second winding device 21 is provided on the roof 2, as shown in FIGS. 5 and 6, the roof outer plate 2 a and the roof interior member are opened from the opening where the second shoulder belt 13 is provided on the roof interior member. It enters into the clearance space 2c between 2b and is connected to the second winding device 21 disposed in the clearance space 2c.

  When the second winding device 21 is provided in the seat back 1a, the guide 30 extends from the upper part of the seat back 1a toward the front of the vehicle. In the belt-mounted state, as shown in FIGS. 1 and 2, the guide 30 extends from the seat back inner upper part corresponding to the shoulder part on the vehicle inner side of the passenger toward the vehicle outer lower part to the center part of the passenger chest. In the belt-released state (free state of the guide 30), as shown in FIGS. 3 and 4, the guide 30 is attached to the holding means 40 provided on the roof 2 diagonally forward and upward from the vehicle inner top of the seat back 1a. Extends toward you.

  When the second winding device 21 is provided on the roof 2, the guide 31 extends from the vehicle inner upper roof portion of the seat back 1a to the vehicle front. When the guide 31 is an elastic guide 31, in the belt-mounted state, as shown in FIG. 5, the elastic guide 31 extends from the roof portion above the shoulder portion inside the occupant's vehicle or diagonally upward to the lower or diagonally downward direction. At 31a, the direction is changed and extends toward the lower outside of the vehicle and extends to the center of the occupant's chest. FIG. 6 shows a belt wearing state. The elastic guide 31 extends along the lower surface of the interior member 2b of the roof 2 substantially horizontally forward from the upper roof portion of the seat back 1a or the upper rear side of the vehicle.

  The guides 30 and 31 intersect the first shoulder belt 12 at the front end portion (the end portion positioned in front of the occupant's chest when the belt is attached). The guides 30 and 31 and the first shoulder belt 12 are X-shaped. The second shoulder belt 13 is slidably inserted through a flat rectangular passage 33 formed in the guides 30 and 31. As shown in FIGS. 7 and 8, the second shoulder belt 13 is closer to the occupant's chest than the first shoulder belt 12 at the intersection between the guides 30 and 31 and the first shoulder belt 12 (the first shoulder belt 12). It is desirable that the second shoulder belt 13 passes under the first shoulder belt 12).

  A flat rectangular passage 32 through which the first shoulder belt 12 is inserted is preferably formed at the front end of the guides 30 and 31. A flat rectangular passage 32 through which the first shoulder belt 12 is inserted and a flat rectangular passage 33 through which the second shoulder belt 13 is inserted are separated by a wall 34 between the two passages. Entanglement between the belt 12 and the second shoulder belt 13 is reliably prevented.

  The tongue plate 25 slidable on the belt portion including the second shoulder belt 13 and the lap belt 14 is engaged with a buckle 26 provided in the lower portion outside the vehicle when the belt is mounted (FIG. 1), and when the belt is released. The buckle 26 is removed (FIG. 3). The buckle 26 is attached to one end of the webbing or wire 15, and the other end of the webbing or wire 15 is fixed to the side surface or floor of the seat cushion 1b.

  The tongue plate 25 or a belt portion in the vicinity of the tongue plate 25 (belt portion including the second shoulder belt 13 and the lap belt 14) provided at the roof 2 portion located in front of the seated occupant and inside the vehicle when the belt is released. The holding means 40 may hold any structure as long as the tongue plate 25 or the belt portion in the vicinity of the tongue plate 25 can be held. For example, a hook provided on the roof 2 (FIG. 10). As shown in FIG. 2, it is preferable that the holding position can be changed in the vehicle front-rear direction. However, as shown in FIG. 2, it may be fixed to the roof 2), or the metal portion 25a of the tongue plate 25 is attracted by magnetic force. It consists of a magnet (FIG. 11). Since both the hook and the magnet are holding means, the reference numeral is given “40” as in the holding means 40.

  As shown in FIGS. 10 and 11, the holding means 40 is preferably arranged so as to extend long in the vehicle front-rear direction at the roof 2 site so that the holding position can be adjusted in the vehicle front-rear direction. FIG. 10 shows a structure in which a guide having a plurality of latches for engaging the hook 40 is extended in the front-rear direction, and the holding position is changed in the front-rear direction by changing the latch position for engaging the hook. FIG. 11 shows a structure in which the magnet 40 is elongated in the vehicle front-rear direction (a direction orthogonal to the plane of FIG. 11), and the metal portion 25 a of the tongue plate 25 is attracted to the magnet 40 at an arbitrary position of the magnet 40.

When the holding means 40 is made of a magnet, the magnet 40 may be provided so as to be partially exposed from the roof 2 to the vehicle interior as shown in FIG. 11, or between the roof interior member and the roof outer plate. It may be provided in the gap. When the magnet 40 is provided in the gap between the roof interior member and the roof outer plate, the space between the roof interior member portion with the magnet on the back side and the other portion so that the position of the magnet can be seen from the indoor side. It is desirable to change the shape and / or the color.
The above configuration can be commonly applied to all the embodiments of the present invention.

Next, a configuration unique to the first embodiment of the present invention will be described.
In the first embodiment of the present invention, the four-point seat belt device 10 for a vehicle includes a slip joint provided at a lower portion inside the vehicle that slidably supports a belt portion including the first shoulder belt 12 and the lap belt 14. 1 (FIGS. 1 to 4, but may be a tongue plate 22 as shown in FIG. 9). In the case of the tongue plate 22, it can be removed from a buckle (not shown) engaged therewith. In the case of the first embodiment, the first shoulder belt 12 and the lap belt 14 are continuously connected to each other (consisting of one webbing), and the slip joint 22 (or tongue plate 22) is connected thereto. It is slidably supported.

  1 to 4 show a slip joint 22, and FIG. 9 shows a tongue plate 22. The slip joint 22 is attached to one end of the webbing or wire 16 or the steel plate, and the other end of the webbing or wire 16 or the steel plate is fixed to the side surface or the floor of the seat cushion 1b.

Next, operations and effects of the first embodiment of the present invention will be described.
When the belt is mounted, the occupant sits on the seat cushion 1b, and the tongue plate 25 held by the holding device 40 of the roof 2 portion located in front of the occupant and on the inside of the vehicle is placed on the buckle 26 side below the vehicle. The belt is pulled out from the belt winder (belt winders 21 and 20 in the first embodiment and belt winder 21 in the second embodiment), and the tongue plate 25 is engaged with the buckle 26. Let As a result, the first shoulder belt 12 and the second shoulder belt 13 intersect in front of the chest to form the X-type shoulder belt 11. The X-type shoulder belt 11 restrains the occupant's chest from the front side, and the lap belt 14 restrains the occupant's waist from the front side (FIGS. 1 and 2). Since the second shoulder belt 13 has guides 30 and 31 above the center of the chest, the feeling of chest compression by the second shoulder belt 13 when the belt is worn is reduced. In addition, since the second shoulder belt 13 and the guides 30 and 31 are on the occupant side of the second shoulder belt 12, the feeling of chest compression by the first shoulder belt 13 is also reduced.

  When the tongue plate 25 is removed from the buckle 26 when releasing the belt, the X-type shoulder belt 11 and the lap belt 14 are automatically lifted up to the roof 2 by the guides 30 and 31, and the belt winding device 20 (and 21) The belt is wound up. As a result, the restraint by the X-type shoulder belt 11 and the lap belt 14 is automatically released, the front of the occupant is released, the side of the occupant's lift side is opened, and the passenger can get on and off freely (FIG. 3). FIG. 4).

  When the belt is mounted, a holding means 40 that holds the tongue plate 25 or the belt portion in the vicinity of the tongue plate 25 when the belt is released is provided on the roof 2 portion located in front of the seated occupant and inside the vehicle. All that is required is to hold the tongue plate 25, move it downward and engage it with the buckle 26, and the operability of the belt mounting is improved. Compared to conventional 4-point seat belt devices such as Patent Documents 1 and 2, it is not necessary to pass the shoulder through the belt, and it is not necessary to move the buckle to the center of the lap belt, so the amount of operation required for belt mounting is reduced. . In addition, the belt can be attached only by removing the tongue plate 25 from the holding means 40 and pulling the tongue plate 25 toward the buckle 26 located outside and below the vehicle, so that the upper body can be mounted like a conventional three-point seat belt device. There is no need to twist and hold the tongue plate on the outer rear side of the vehicle and pull the tongue plate diagonally forward and downward, and further on the rear side of the vehicle.

  In addition, since the first shoulder belt 12 and the second shoulder belt 13 are X-shaped when the belt is mounted, the front and rear bumps are compared to the case where the left and right shoulder belts do not intersect (for example, V-shaped). The restraint of the chest of the passenger at the time is improved. Further, since the first shoulder belt 12 and the second shoulder belt 13 are directly or indirectly connected to the lap belt 14 at both ends of the lap belt 14, the load from the occupant is applied to the shoulder belts 12, 13 at the front collision. The shoulder belts 12 and 13 pull the lap belt 14 at at least one end of the lap belt 14, and the lap belt 14 is pulled in a direction to bite into the occupant's waist. Therefore, the lap belt 14 does not float upward from the waist, and the restraint of the waist by the lap belt 14 is improved.

  Further, when the belt is released, the second shoulder belt 13 is lifted up together with the first shoulder belt 12 by the guides 30 and 31, so that the tongue plate 25 or the belt portion in the vicinity of the tongue plate 25 can be easily hung on the holding means 40. The guides 30 and 31 reduce chest compression of the X-type shoulder belt 11 when the belt is worn.

The holding means 40 located in front of the passenger on the inner side of the vehicle can adjust the holding position of the tongue plate 25 or the belt portion in the vicinity of the tongue plate 25 in the vehicle front-rear direction. By setting the position to the rear of the movable range of the means 40, the holding means 40 (for example, a hook suspended from the ceiling) is out of the sight of the passenger and does not get in the way. For example, when a person is not sitting in the passenger seat and the holding means 40 is concerned, the driver may move the holding means 40 to the rear position. In addition, when releasing the mounting, the holding position is set to the front position in the movable range of the holding means 40, so that the tongue plate 25 is held and released from the holding means 40 in front of the occupant and inside the vehicle. It becomes.
The above operations and effects can be commonly applied to all the embodiments of the present invention.

Next, operations and effects unique to the first embodiment of the present invention will be described.
In the first embodiment, the vehicle four-point seat belt device 10 includes a slip joint 22 or a tongue plate that slidably supports a belt portion including the first shoulder belt 12 and the lap belt 14 (a tongue instead of the slip joint 22). Plate, which is different from the tongue plate 25), the first and second shoulder belts 12, 13 and the lap belt 14 can be wound only by the first belt winding device 20. The second belt winding device 21 that winds the lap belt 14 and the second shoulder belt 13 can be eliminated. However, the second belt winding device 21 may be provided.

  When the second belt winding device 21 is provided, the second belt winding device 21 may be provided on the seat back 1a, or a gap between the roof outer plate 2a and the roof interior material 2b. It may be provided in the space 2c. When the second belt winding device 21 is provided on the seat back 1a, the guide 30 is supported from the seat back 1a, and the second belt winding device 21 is disposed between the roof outer plate 2a and the roof interior material 2b. When provided in the gap space 2 c, the guide 31 is supported from the roof 2.

  Next, a second embodiment of the present invention will be described with reference to FIG. FIGS. 1-11 is applied also to Example 2 of this invention except the slip joint 22 of the vehicle inner lower part, and its vicinity.

A specific configuration of the second embodiment of the present invention will be described. As the common configuration, a configuration applicable to all the embodiments of the present invention described in the first embodiment is applied.
In the second embodiment of the present invention, the four-point seat belt device 10 for a vehicle has an anchor 23 on the lower inside of the vehicle to which the first shoulder belt 12 and the lap belt 14 are fixed. The lower end of the first shoulder belt 12 is fixed to the anchor 23 so as not to slide. The inner end of the lap belt 14 is fixed to the anchor 23 so as not to slide. In the second embodiment of the present invention, a second belt winding device 21 connected to the upper end of the second shoulder belt 13 so as to be able to wind the second shoulder belt 13 must be provided.

Next, the specific actions and effects of the apparatus according to the second embodiment of the present invention will be described. Of the operations and effects of the first embodiment of the present invention, the operations and effects common to all the embodiments of the present invention are also realized as the operations and effects of the apparatus of the second embodiment of the present invention.
In the second embodiment of the present invention, since the belt portion including the first shoulder belt 12 and the lap belt 14 is fixed to the vehicle by the anchor 23, the second belt for winding the lap belt 14 and the second shoulder belt 13 is wound. The belt winding device 21 is required. Compared to the case where only the first belt winding device 20 is provided for the first and second shoulder belts 12 and 13 and the lap belt 14 because the first and second belt winding devices 20 and 21 are provided. The first and second shoulder belts 12 and 13 and the lap belt 14 can be wound and / or pulled out quickly.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view when a belt is mounted on a vehicle four-point seat belt device (when a guide is attached to a back seat) according to a first embodiment of the present invention (when a joint at the lower inside of the vehicle is a slip joint). It is the side view seen from the vehicle inner side at the time of belt wearing of the four-point seat belt device for vehicles (when a guide is attached to a back seat) of Example 1 of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a vehicle four-point seat belt device (when a guide is attached to a back seat) according to Embodiment 1 of the present invention when the belt is released. It is the side view seen from the vehicle inner side at the time of belt wearing release of the four-point seat belt device for vehicles (when a guide is attached to a back seat) of Example 1 of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view when a belt is mounted on a vehicle four-point seat belt device (when a guide is attached to a roof) according to a first embodiment of the present invention (when the lower joint inside the vehicle is a slip joint). It is the side view seen from the vehicle inner side at the time of belt wearing of the 4-point seat belt device for vehicles (when a guide is attached to a roof) of Example 1 of the present invention. It is a front view at the time of belt wearing of the guide front-end | tip part of Example 1 of the present invention and its vicinity. It is sectional drawing of FIG. FIG. 3 is a front view of a slip joint / tung plate when the slip joint of the vehicle four-point seat belt device according to the first embodiment of the present invention is a slip joint / tung plate (partly a side view of a vehicle seat belt device); is there. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a holding unit of a vehicle four-point seat belt device according to a first embodiment of the present invention when viewed from the vehicle inner side when the holding unit is a hook. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a holding unit of a vehicle four-point seat belt device according to a first embodiment of the present invention when viewed from the front of the vehicle toward the rear when the holding unit is made of a magnet. It is a side view at the time of belt mounting of the four-point seat belt device for a vehicle (when the guide is attached to the back seat) of the second embodiment of the present invention (when the joint inside the vehicle is an anchor).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seat 1a Seat back 1b Seat cushion 2 Roof 2a Outer plate 2b Interior material 2c Gap space 10 Four-point seat belt device 11 for vehicles X-type shoulder belt 12 First shoulder belt 13 Second shoulder belt 14 Lap belt 15 Webbing Or wire 16 Webbing or wire 20 1st belt winding device 21 2nd belt winding device 22 Slip joint (vehicle inside lower part)
23 anchor 24 shoulder anchor (vehicle upper part)
25 Tongue plate (vehicle outer bottom)
25a Metal part 26 Buckle (vehicle outer lower part)
27 Shoulder Anchor (Vehicle inner top, seat back mounting)
28 Shoulder Anchor (Vehicle inner top, roof mounting)
30 Guide (supported from the seat back)
31 Guide (supported from the roof)
32 passage (first shoulder belt is inserted)
33 Aisle (second shoulder belt is inserted)
34 Wall 40 Holding means (hook, magnet)

Claims (8)

An X-type shoulder belt including a first shoulder belt extending between the vehicle outer upper portion and the vehicle inner lower portion when the belt is attached and a second shoulder belt extending between the vehicle inner upper portion and the vehicle outer lower portion when the belt is attached; 2 shoulder belts, or a lap belt connected to the first and second shoulder belts, and a belt part including the second shoulder belt and the lap belt, and slidable to a buckle provided outside the vehicle. A tongue plate, and a belt winding device connected to the first shoulder belt,
When the belt is released, the vehicle has a four-point type equipped with a moving means for moving the first shoulder belt together with the tongue plate and the second shoulder belt toward the front upper side of the seated occupant and toward the roof inside the vehicle. Seat belt device.   The moving means allows the second shoulder belt to pass under the first shoulder belt, or allows the first and second shoulder belts to slide relative to each other or within a predetermined range. The four-point seat belt device for a vehicle according to claim 1, wherein the four-point seat belt device is a guide that is locked to the vehicle.   4. The vehicle four-point device according to claim 2, wherein the guide is configured to automatically flip up the first shoulder belt together with the tongue plate and the second shoulder belt when the belt is released. 4. Type seat belt device.   4. The four-point seat belt device for a vehicle according to claim 3, wherein the guide is configured to be able to be flipped up by any one of an elastic force of the guide itself, a biasing force by a spring, and a driving force by a driving device such as a motor. .   5. The apparatus according to claim 1, further comprising a holding unit that is provided on a roof in front of the seated occupant and inside the vehicle, and holds the tongue plate or a belt portion in the vicinity of the tongue plate when the belt is released. 4 point seat belt device for vehicles.   6. The vehicle four-point seat belt device according to claim 5, wherein the holding means is capable of adjusting a holding position of the tongue plate or a belt portion in the vicinity of the tongue plate in a vehicle front-rear direction.   The four-point seat belt device for vehicles according to any one of claims 1 to 6, further comprising a slip joint that slidably supports a belt portion including the first shoulder belt and a lap belt.   The vehicle according to any one of claims 1 to 6, further comprising an anchor to which the first shoulder belt and the lap belt are fixed, and a second belt winding device connected to the second shoulder belt. 4-point seat belt device.

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