JP2007253725A - Seat belt system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat belt system which can improve the crew member restraining ability of shoulder webbing with a simple configuration. <P>SOLUTION: In the seat belt system 10, when a pretensioner mechanism 18A of a retractor 18 has operated and the webbing 12 has been pulled into the retractor 18, the shoulder webbing 12B and lap webbing 12A are brought into close contact with the body of the crew member 32, and the crew member restraining ability of the shoulder webbing 12B and the lap webbing 12A can be improved. Further, because the locking of a slip joint 20 is released in this case, the slip joint 20 is forcedly moved downward in a vehicle with the retraction of the webbing 12 into the retractor 18. As a result, the upper end portion of the shoulder webbing 12B is brought into close contact with the shoulder portion of the crew member 32, and the crew member restraining ability of the shoulder webbing 12B can be furthermore improved. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a seat belt device for a vehicle.

  In a vehicle seat belt device, one end of the webbing is locked to a winding device provided on the side of the seat. Further, the webbing is folded by being wound around a slip joint attached to a center pillar or the like (near the passenger's shoulder), and the other end is locked to an anchor plate provided in the vicinity of the winding device. When the occupant wears the webbing, a tongue plate slidably disposed in the middle part of the webbing between the anchor plate and the slip joint is provided on the side of the seat opposite to the winding device. Engage with the buckle device. As a result, the webbing is put on. In this wearing state, the webbing middle part between the slip joint and the tongue plate becomes a shoulder webbing that restrains the occupant's upper body, and the webbing middle part between the tongue plate and the anchor plate restrains the occupant's waist. It becomes.

  By the way, in the seat belt apparatus as described above, a structure in which the slip joint is moved in the vehicle vertical direction by the driving force of an electric motor is known (for example, see Patent Document 1). In this seat belt device, the looseness of the shoulder webbing is removed by driving the electric motor and raising the slip joint during sudden deceleration of the vehicle, thereby improving the occupant restraint of the shoulder webbing To do.

However, in the seat belt device having the above-described configuration, the configuration of the moving device for moving the slip joint in the vehicle vertical direction is complicated.
JP 2004-345443 A

  In view of the above facts, an object of the present invention is to provide a seat belt device capable of improving the occupant restraint of shoulder webbing with a simple configuration.

  A seat belt device according to a first aspect of the present invention includes a slip joint on which an upper end portion of a shoulder webbing for restraining an upper body of a vehicle occupant is wound and which is movable in a vehicle vertical direction, and an upper end of the shoulder webbing A retractor that pulls the portion downward in the vehicle, a lock mechanism that restricts the downward movement of the slip joint, and a release means that releases the restriction by the lock mechanism when an emergency situation of the vehicle is detected. It is characterized by that.

  In the seatbelt device according to claim 1, when the release means detects the movement of the slip joint by the lock mechanism when detecting the emergency situation of the vehicle (for example, the rollover prediction state, the collision prediction state, etc.), the slip joint While moving (falling) to the vehicle lower side by its own weight, the upper end portion of the shoulder webbing wound around the slip joint is pulled downward by the retractor. As a result, the shoulder webbing is tightly attached to the shoulder portion of the occupant, so that the occupant restraint of the shoulder webbing is improved. As described above, this seat belt device has a simple configuration because the slip joint is moved downward by simply releasing the restriction of the slip joint by the lock mechanism.

  According to a second aspect of the present invention, there is provided a seat belt device comprising: a slip joint on which an upper end portion of a shoulder webbing for restraining an upper body of a vehicle occupant is wound and movable in a vehicle vertical direction; And a pull-in moving means for moving the slip joint downward in the vehicle by forcibly pulling in the upper end of the shoulder webbing when a vehicle emergency is detected.

  In the seatbelt device according to claim 2, when the retracting movement means detects an emergency situation of the vehicle (for example, a rollover state, a rollover prediction state, a collision state, a collision prediction state, etc.), the upper end portion of the shoulder webbing is forced. By retracting the shoulder webbing, the shoulder webbing is tightly attached to the upper body of the occupant, and the occupant restraint of the shoulder webbing is improved. In addition, since the slip joint is moved downward when the vehicle is retracted, the shoulder webbing is tightly attached to the shoulder of the occupant, and the occupant restraint of the shoulder webbing is further improved. Thus, in this seat belt device, the slip joint is moved downward by the pull-in moving means for retracting the upper end portion of the shoulder webbing, so that the configuration is simple.

  A seatbelt device according to a third aspect of the present invention is the seatbelt device according to the second aspect, wherein the seatbelt device has a lock mechanism for restricting the movement of the slip joint to the vehicle lower side, When the emergency situation is detected, the restriction of the lock mechanism is released.

  In the seat belt device according to the third aspect, the pull-in moving means releases the slip joint locking mechanism when the emergency state of the vehicle is detected, that is, when the upper end of the shoulder webbing is retracted. For this reason, the slip joint falls due to its own weight and moves to the lowermost end of the moving range as the upper end of the shoulder webbing is retracted.

  According to a fourth aspect of the present invention, there is provided the seat belt device according to the third aspect, wherein the pull-in moving means forcibly takes up the winding shaft for winding the shoulder webbing, and the winding shaft. It has the retractor provided with the pretensioner mechanism rotated in the webbing take-up direction.

  In the seat belt device according to the fourth aspect, when the pretensioner mechanism of the retractor rotates the take-up shaft in the webbing take-up direction, the shoulder webbing is drawn into the retractor, and the slip joint moves downward in the vehicle along with this retraction. And move.

  According to a fifth aspect of the present invention, there is provided a seat belt device comprising: a winding member on which an upper end portion of a shoulder webbing for restraining an upper body of a vehicle occupant is wound; The hanging member is disposed close to the occupant's shoulder, and has moving means for moving the winding member to the rear of the vehicle when an emergency of the vehicle is detected.

  In the seat belt device according to the fifth aspect, since the wrapping member is usually disposed close to the shoulder of the occupant, the occupant can easily grasp the shoulder webbing and has good wearability. Further, when the moving means detects an emergency of the vehicle, the winding member, that is, the upper end portion of the shoulder webbing is moved to the rear of the vehicle, so that the slack of the shoulder webbing is removed and the occupant restraint of the shoulder webbing is improved. .

  The seat belt device according to a sixth aspect of the present invention is the seat belt device according to the fifth aspect, wherein one end of the wrapping member is rotatably attached to the vehicle, and the shoulder is mounted on the other end. The arm is provided with a winding portion around which the upper end portion of the webbing is wound, and the moving means has a drive source for rotating the winding member.

  In the seat belt device according to the sixth aspect, when the driving source rotates the arm to one side, the winding portion of the upper end portion of the shoulder webbing provided at the other end portion of the winding member is moved forward of the vehicle. Further, when the drive source rotates the arm to the other side, the winding portion of the winding member is moved rearward of the vehicle. Thus, the configuration is simple because it is only necessary to rotate the arm.

  As described above, according to the seat belt device of the present invention, the occupant restraint property of the shoulder webbing can be improved with a simple configuration.

<First Embodiment>
FIGS. 1A and 1B show side views of the configuration of a vehicle seat belt apparatus 10 according to a first embodiment of the present invention. In the figure, the arrow FR indicates the front of the vehicle, and the arrow UP indicates the upper side of the vehicle.

  The seat belt device 10 is a so-called three-point seat belt device and includes an occupant restraining webbing 12 formed in a long belt shape. One end of the webbing 12 in the longitudinal direction is locked to a winding shaft (not shown) of the retractor 18 fixed to the lower end of the center pillar 16 of the vehicle 14, and the winding shaft is an urging member (not shown). The urging force of the webbing 12 is always urged in the winding rotation direction. The retractor 18 has a pretensioner mechanism 18A that forcibly rotates the take-up shaft in the webbing take-up direction by a driving force of a motor (not shown).

  The intermediate portion in the longitudinal direction of the webbing 12 is wound around a slip joint 20 provided at the upper portion of the center pillar 16 and the other end portion in the longitudinal direction of the webbing 12 is fixed near the lower end portion of the center pillar 16. The anchor plate 22 is locked. The slip joint 20 is attached to a guide groove 24 formed in the center pillar 16 along the vehicle vertical direction, and is movable in the vertical direction with respect to the vehicle 14. The slip joint 20 has a lock mechanism 20A, and movement in the vehicle vertical direction is restricted by the lock mechanism 20A. The lock mechanism 20A has a solenoid (not shown) as release means, and is configured to release the movement restriction of the slip joint 20 when the solenoid is activated.

  A tongue plate 26 is slidably attached to an intermediate portion in the longitudinal direction of the webbing 12. The tongue plate 26 is locked to a buckle device 30 attached to a side surface of the seat 28 on the side opposite to the retractor 18 with respect to the seat 28. When the occupant 32 seated on the seat 28 locks the tongue plate 26 to the buckle device 30, a portion of the webbing 12 between the tongue plate 26 and the anchor plate 22 becomes a lap webbing 12 </ b> A that restrains the occupant's waist. Of these, the portion between the slip joint 20 and the tongue plate 26 is the shoulder webbing 12B that restrains the upper body of the occupant. That is, the upper end of the shoulder webbing 12B is wound around the slip joint 20. When the release button provided on the buckle device 30 is operated, the locking of the tongue plate 26 to the buckle device 30 is released.

  Further, the motor of the pretensioner mechanism 18A and the solenoid of the lock mechanism 20A described above are connected to a control device (not shown) that constitutes the release means and the pulling movement means, and a sensor (not shown) connected to the control device is connected to the vehicle 14. When an emergency situation (for example, a collision state, a collision prediction state, or a sudden deceleration state) is detected, the control device operates the motor of the pretensioner mechanism 18A. In addition, a rollover sensor (not shown) is connected to the control device, and when the rollover sensor detects an emergency situation (a rollover state) of the vehicle 14, the control means controls the motor of the pretensioner mechanism 18A and the lock mechanism 20A. The solenoid is activated. The rollover sensor detects the rollover state of the vehicle 14 by detecting the tilt angle and the angular velocity of the vehicle 14, and rolls over the vehicle 14 early (that is, before the vehicle 14 rolls over completely). Ii) It can be detected (predicted).

  Next, the operation of the first embodiment will be described.

  In the seat belt device 10 configured as described above, when the occupant 32 is seated on the seat 16 of the vehicle 14 and the tongue plate 26 is locked to the buckle device 30, the occupant 32 is in a state of wearing the webbing 12. When a rollover sensor (not shown) detects the rollover of the vehicle 14 (prediction), a control device (not shown) operates the motor of the pretensioner mechanism 18A of the retractor 18. Therefore, the take-up shaft of the retractor 18 is rotated in the webbing take-up direction, and the webbing 12 is drawn into the retractor 18 (the upper end portion of the shoulder webbing 12B is drawn downward in the vehicle). As a result, the shoulder webbing 12B is tightly attached to the upper body of the occupant 32, and the lap webbing 12A is tightly attached to the waist of the occupant 32, thereby improving the occupant restraint of the shoulder webbing 12B and the lap webbing 12A.

  In addition, at this time, since the control device operates the solenoid of the lock mechanism 20A, the movement restriction of the slip joint 20 is released. For this reason, the slip joint 20 moves (falls) to the vehicle lower side by its own weight, and is forcibly moved to the vehicle lower side as the webbing 12 is retracted into the retractor 18, and reaches the lowermost end of the guide groove 24. As a result, as shown in FIG. 1B, the upper end of the shoulder webbing 12B is tightly attached to the shoulder of the occupant 32, so that the upward movement of the occupant 32 is restricted by the shoulder webbing 12B. . Therefore, even when the vehicle 14 rolls over and rotates, the occupant 32 can be well restrained to the seat 28, and the head of the occupant 32 can be prevented from contacting the roof of the vehicle 14.

  As described above, in the seat belt device 10 according to the first embodiment, it is possible to improve the occupant restraint property of the shoulder webbing 12B particularly when the vehicle rolls over. Moreover, since the slip joint 20 is forcibly moved downward by the retractor 18 that winds up the webbing 12 (draws the upper end of the shoulder webbing 12B downward), the configuration is simple.

  In the seat belt device 10 according to the first embodiment, the retracting movement unit is configured by the retractor 18 provided with the pretensioner mechanism 18A. However, the present invention is not limited to this, and the retracting movement unit includes the retractor 18 and the retracting movement unit. A pretensioner mechanism or the like provided separately can also be applied. Further, even when the pretensioner mechanism is omitted, slipping occurs when a winding shaft (not shown) of the retractor 18 is urged in the webbing winding direction as in the seat belt device 10 according to the first embodiment. Since the webbing 12 is wound around the retractor 18 by the urging force when the joint 20 falls by its own weight, the slack generated in the webbing 12 due to the fall can be removed, and the occupant restraint of the webbing 12 can be eliminated. Can be improved.

  Further, in the seat belt device 10 according to the first embodiment, the slip joint 20 includes the lock mechanism 20A as the release unit. However, the present invention is not limited to this, and the slip joint 20 includes frictional force and The lock mechanism 20A can be omitted by adopting a configuration in which the guide groove 24 is held at an arbitrary position by a breakable member or the like and is moved downward by the operation of the pretensioner mechanism. In this case, the pretensioner mechanism becomes the releasing means.

Furthermore, in the first embodiment, the lap webbing 12A and the shoulder webbing 12B are integrally continuous. However, the present invention is not limited to this, and the lap webbing 12A and the shoulder webbing 12B are two. It is good also as a structure which is divided | segmented and both are latched by the vehicle 14 via the tongue plate and buckle apparatus which are the same or different bodies, respectively. This also applies to the second embodiment of the present invention described below.
<Second Embodiment>
Next, a second embodiment of the present invention will be described. Note that the same reference numerals as those in the first embodiment are assigned to the configurations and operations basically similar to those in the first embodiment, and description thereof is omitted.

  FIG. 2 is a side view showing the configuration of a vehicle seat belt device 50 according to the second embodiment of the present invention. 2 and FIGS. 4 and 5 used in the following description, the retractor 20, the anchor plate 22, and the guide groove 24 are not shown. The seat belt device 50 has basically the same configuration as the seat belt device 10 according to the first embodiment, but differs in the following points.

  The seat belt device 50 has an arm 52 attached to the upper part of the center pillar 16. As shown in FIG. 3, the arm 52 is formed in a long plate shape, and the support shaft 54 provided at the upper end (one end in the longitudinal direction) rotates to the center pillar 16 above the slip joint 20 on the vehicle. It is pivotally supported. An output shaft of a motor 56 as a drive source provided inside the center pillar 16 is connected to the support shaft 54, and when the motor 56 is operated, the arm 52 rotates around the support shaft 54. The lower end portion (the other end portion in the longitudinal direction) moves to the vehicle front side (arrow A direction) and the vehicle rear side (arrow B direction) in FIG. In FIG. 3, for convenience of explanation, the lower end side of the arm 52 is illustrated in a state of being separated from the center pillar 16.

  A slit-like webbing insertion hole 58 as a winding portion is formed at the lower end portion of the arm 52. An intermediate portion of the webbing 12 between the slip joint 20 and the tongue plate 26 is inserted into the webbing insertion hole 58. As shown in FIG. 4, when the occupant 32 engages the tongue plate 26 with the buckle device 30 and wears the webbing 12, the upper end portion of the shoulder webbing 12 </ b> B is wound around the webbing insertion hole 58. Yes.

  Further, a control device (not shown) is connected to the motor 56 described above, and this control device normally arranges the lower end portion of the arm 52 on the vehicle front side by the operation of the motor 56. In this state, as shown in FIG. 4, the webbing insertion hole 58 is disposed close to the shoulder of the occupant 32 seated on the seat 28. For this reason, the webbing 12 is supported substantially linearly between the shoulder portion of the passenger 32 and the slip joint 20 when the passenger 32 is wearing the webbing 12.

  Further, a sensor (not shown) is connected to the above-described control device, and the control device detects an emergency situation of the vehicle 14 (for example, a collision state, a collision prediction state, a vehicle sudden deceleration state, a vehicle rollover state, etc.). When this occurs, the motor 56 is operated to rotate the lower end of the arm 52 toward the vehicle rear side, and the arm 52 is moved to a position along the center pillar 16 (as shown in FIG. 5). In this state, the webbing insertion hole 58 is disposed below the slip joint 20 in the vehicle, and the webbing 12 is bent like a letter between the shoulder of the occupant 32 and the slip joint 20.

  Next, the operation of the second embodiment will be described.

  In the seat belt device 50 having the above-described configuration, the lower end of the arm 52 is normally disposed on the front side of the vehicle and the webbing insertion hole 58 is disposed close to the shoulder of the occupant 32 so that the occupant 32 wears the webbing 12. When doing so, the webbing 12 (the tongue plate 26) is easily grasped and the mounting property is good.

  Further, when a rollover sensor (not shown) connected to a control device (not shown) detects (predicts) an emergency (rollover) of the vehicle 14, the arm 52 is moved to the vehicle rear side by the control device and the motor 56, and the webbing is inserted. A hole 58 is disposed below the slip joint 20 in the vehicle. Thereby, the slackness of the shoulder webbing 12B and the lap webbing 12A is removed, and the occupant restraint of the shoulder webbing 12B and the lap webbing 12A is improved. Moreover, since the webbing insertion hole 58 is disposed below the slip joint 20 in the vehicle, the upper end portion of the shoulder webbing 12B is disposed below the slip joint 20 and the shoulder webbing 12B is tightly attached to the shoulder of the occupant 32. Is done. Therefore, since the movement of the occupant 32 to the upper side of the vehicle is restricted by the shoulder webbing 12B, the occupant 32 can be well restrained to the seat 28 even when the vehicle 14 rolls over and rotates. Can be prevented from contacting the roof of the vehicle 14.

  In addition, the seat belt device 50 has a simple configuration because the webbing insertion hole 58 is moved in the vehicle front-rear direction by rotating (swinging) the arm 52.

  In the seat belt device 50 according to the second embodiment, the arm 52 that is a winding member is rotated around the support shaft 54 as described above. However, the present invention is not limited to this, and the winding is performed. It is good also as a structure which a member slides in a vehicle front-back direction along a guide rail.

  The first embodiment and the second embodiment are particularly effective when the vehicle 14 rolls over as described above. However, the present invention is not limited to this, and the collision state and the collision prediction state of the vehicle 14 are not limited thereto. For example, the occupant restraint of the shoulder webbing 12B can be improved. However, in the invention described in claim 1, since the slip joint is configured to move under the vehicle by its own weight, the release means described in claim 1 is in a rollover prediction state or a collision prediction state of the vehicle (that is, It is preferable that the movement restriction of the slip joint by the lock mechanism is canceled before the vehicle rolls over or collides.

BRIEF DESCRIPTION OF THE DRAWINGS The structure of the seatbelt apparatus which concerns on the 1st Embodiment of this invention is shown, (A) is a side view which shows the state by which the slip joint is arrange | positioned at the vehicle upper side, (B) is a vehicle side below a slip joint. It is a side view which shows the state arrange | positioned in. It is a side view which shows the structure of the seatbelt apparatus which concerns on the 2nd Embodiment of this invention. It is a perspective view which shows the structure of the peripheral member containing the arm which is a structural member of the seatbelt apparatus which concerns on the 2nd Embodiment of this invention. It is a side view which shows the structure of the seatbelt apparatus which concerns on the 2nd Embodiment of this invention, and shows the state which the passenger | crew installed webbing. It is a side view which shows the structure of the seatbelt apparatus which concerns on the 2nd Embodiment of this invention, and shows the state by which the arm was moved to the vehicle back.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Seat belt apparatus 12 Webbing 12A Lap webbing 12B Shoulder webbing 14 Vehicle 18 Retractor (retraction movement means)
18A Pre-tensioner mechanism 20 Slip joint 20A Lock mechanism 32 Crew 50 Seat belt device 52 Arm (winding member)
56 Motor (drive source)
58 Webbing insertion hole (winding part)

Claims (6)

A slip joint that is wound around the upper end of a shoulder webbing that restrains the upper body of a vehicle occupant and is movable in the vehicle vertical direction;
A retractor that pulls the upper end of the shoulder webbing downward in the vehicle;
A lock mechanism for restricting movement of the slip joint downward in the vehicle;
Release means for releasing the restriction by the lock mechanism when an emergency of the vehicle is detected;
A seat belt device having A slip joint that is wound around the upper end of a shoulder webbing that restrains the upper body of a vehicle occupant and is movable in the vehicle vertical direction;
A pull-in moving means provided below the slip joint for moving the slip joint downward in the vehicle by forcibly pulling in the upper end of the shoulder webbing when an emergency situation of the vehicle is detected;
A seat belt device having   The lock mechanism for restricting the downward movement of the slip joint to the vehicle is provided, and the pull-in moving means cancels the restriction of the lock mechanism when an emergency situation of the vehicle is detected. A seat belt device according to claim 1.   The pull-in moving means has a retractor including a pretensioner mechanism for forcibly moving the slip joint downward in the vehicle by forcibly rotating a winding shaft for winding the shoulder webbing in the webbing winding direction. The seat belt device according to claim 3. A winding member on which an upper end portion of a shoulder webbing for restraining an upper body of a vehicle occupant is wound and which is movable in the vehicle front-rear direction;
Usually, the winding member is arranged close to the passenger's shoulder and moving means for moving the winding member to the rear of the vehicle when an emergency situation of the vehicle is detected,
A seat belt device having   The winding member is an arm having one end portion rotatably attached to the vehicle and the other end portion provided with a winding portion around which the upper end portion of the shoulder webbing is wound. 6. The seat belt device according to claim 5, further comprising a drive source for rotating the winding member.

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