JP5364809B2 - Seat belt device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat belt device capable of easily attaching a webbing belt at a pelvis position corresponding to a pelvis near a waist part or its neighborhood. <P>SOLUTION: In the seat belt device 10, since an anchor 30 and a buckle 72 are positioned at a front end side of a seat 40 in the state that a tongue 70 is attached to the buckle 72, a lap webbing 78 of the webbing belt 18 is laid around a body of an occupant near a thigh and a knee of the occupant 74. After that, since the anchor 30 and the buckle 72 are moved to a rear side of the seat 40 and the webbing belt 18 can be rolled-up to a spool 16 when the movement is completed, the lap webbing 78 is moved toward a position corresponding to the pelvis of the occupant 74 (pelvis position) in the state that it is contacted with the thigh and the knee. Thereby, the lap webbing 78 can be easily attached at an ideal attachment position corresponding to the pelvis or its neighborhood. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a seat belt device for restraining the body of an occupant seated in a vehicle seat.

  For example, the seat belt device disclosed in the following Patent Document 1 is a so-called three-point seat belt device, and the front end side of the webbing belt restrains the waist of the occupant seated on the seat rather than the tongue attached to the buckle. The wrap webbing is a shoulder webbing that restrains the shoulder and chest of the occupant at the base end side of the webbing belt rather than the tongue attached to the buckle.

Japanese Utility Model Publication No. 4-93222

  By the way, when restraining the occupant's waist with lap webbing as in the above-described seat belt device, the position corresponding to the pelvis of the occupant is an ideal mounting position, and this ideal mounting position or It is preferable that a lap webbing is attached in the vicinity thereof.

  An object of the present invention is to obtain a seat belt device in which a webbing belt can be easily attached at or near the pelvic position corresponding to the pelvis in the vicinity of the waist, in consideration of the above facts.

The seat belt device according to the first aspect of the present invention includes an anchor provided on one side along the width direction of the seat with respect to a seating position in a vehicle seat, and a width of the seat with respect to the seating position. A buckle provided on the other side along the direction and one end in the longitudinal direction are fixed to the anchor, and the tongue held by the buckle by being attached to the buckle is the other end side than the one end in the longitudinal direction In the state where the tongue is attached to the buckle, a webbing belt that restrains a waist portion of an occupant seated on the seat between the anchor and the buckle, and the occupant is not seated on the seat When the seat is switched from the seated state to the seated state, the anchor is moved to the front of the seat from the initial position in the vicinity of the rear portion of the seat along the widthwise side edge of the seat. When the tongue to the buckle is switched to a state of being attached from the state of not being attached, along the side edge to move the anchor to the rear of the seat, further through said initial position of the seat Guiding means for moving to the other side along the width direction .

  In the seat belt device according to the first aspect of the present invention, when the occupant is switched from the seated state to the seated state of the vehicle, the anchor is moved to the front side of the seat by the guiding means. When the tongue is attached to the buckle while the anchor is moved to the front side of the seat, the webbing belt is hung on the thigh or knee of the occupant. When the tongue is attached to the buckle in this state, the anchor is moved to the rear side of the seat by the guiding means. As the anchor moves rearward in this manner, the webbing belt moves rearward on the thigh and knees while being in contact with the thigh and knees of the occupant, that is, to a position corresponding to the pelvis of the occupant (pelvis position). Therefore, as the anchor moves rearward, the webbing belt is mounted at or near the mounting position corresponding to the pelvis of the occupant.

Further, as described above, with the webbing belt moved to a position corresponding to the pelvis of the occupant (pelvis position), the anchor passes through the initial position and is moved to the other side along the width direction of the seat . Thereby, the slack of the webbing belt at the position corresponding to the pelvis of the occupant (pelvic position) is eliminated.

  In the present invention, the movement direction of the anchor that has returned to the initial position and passed through the initial position may be in a direction other than the front of the seat, as long as the anchor can further pull the webbing belt. Accordingly, as an example of such a direction, there is a direction opposite to the side where the anchor is provided along the width direction of the seat, but the present invention is not limited to this direction.

  A seat belt device according to a second aspect of the present invention is the seat belt device according to the first aspect of the present invention, wherein the seat belt device has flexibility, is formed in a long and annular shape, and the anchor is connected to drive means. The guide means is configured to include a connecting member that moves the anchor by moving in the longitudinal direction with the driving force of the driving force, and along the side edge of the seat opposite to the side on which the anchor is provided. The buckle is movably provided, and the buckle is coupled to the coupling means.

  In the seatbelt device according to the second aspect of the present invention, when switching from a state in which no occupant is seated on the seat of the vehicle to a seated state, the driving means constituting the guiding means is activated to constitute the guiding means. The annular connecting member moves in the longitudinal direction. As a result, the anchor and the buckle connected to the connecting member are moved to the front side of the seat. When the tongue is attached to the buckle while the anchor is moved to the front side of the seat, the webbing belt is hung on the thigh or knee of the occupant. In this state, when the tongue is attached to the buckle, the driving means reversely rotates and the connecting member rotates in the reverse direction. Thereby, an anchor and a buckle are moved to the back side of a seat.

  Thus, in the present invention, not only the anchor but also the buckle moves, so that the webbing belt can be mounted at or near the ideal mounting position corresponding to the pelvis of the occupant.

  According to a third aspect of the present invention, there is provided the seat belt device according to the second aspect of the present invention, wherein, when the anchor moves further in the other direction from the initial position, the connection member and the buckle Release means for releasing the connection is provided.

  In the seatbelt device according to the third aspect of the present invention, the anchor and the buckle move to the rear side of the seat, the anchor returns to the initial position, and from this state, another direction (the front of the seat is different from the other). Direction, for example, when the anchor is moved to the side opposite to the side where the anchor is provided in the width direction of the seat), the connection between the connecting member and the buckle is released and the buckle is moved even if the connecting member moves. Will not move any further. For this reason, the buckle can be held at the initial position.

  In the present invention, the “other direction” means a direction different from the front of the seat. As described above, as an example, there is a direction opposite to the side where the anchor is provided along the width direction of the seat, but the present invention is not limited to that direction.

  As described above, the seat belt device according to the present invention can easily attach the webbing belt at or near the pelvic position in the vicinity of the occupant's waist.

It is a side view which shows roughly the structure of the principal part of the seatbelt apparatus which concerns on 1st Embodiment. It is a side view which shows the state which the anchor and the buckle moved to the front side of the seat. It is a side view corresponding to Drawing 2 showing the state where an anchor and a buckle are moving to the back side of a seat. It is a side view corresponding to Drawing 2 showing the state where an anchor and a buckle reached a predetermined position to the back side of a seat. It is side surface sectional drawing which shows the structure of a guidance means. (A) shows the state of the connecting plate when the anchor has reached a predetermined position on the rear side of the seat, and (B) shows the state of the connecting plate when the anchor has reached a predetermined position on the front side of the seat. It is a partial side sectional view showing. It is a block diagram showing roughly the composition of the system of the seatbelt device concerning a 1st embodiment. It is a time chart which shows the outline of control of the system of the seatbelt apparatus which concerns on 1st Embodiment. It is a top view which shows roughly the structure of the principal part of the guidance means of the seatbelt apparatus which concerns on 2nd Embodiment. It is side surface sectional drawing which shows schematically the structure of the principal part of the guidance means of the seatbelt apparatus which concerns on 2nd Embodiment. It is front sectional drawing which shows schematically the structure of the principal part of the guidance means of the seatbelt apparatus which concerns on 2nd Embodiment. It is front sectional drawing corresponding to FIG. 11 which shows the state of the guidance | induction means in the state which the buckle reached | attained the predetermined position of the back side of a seat. It is side surface sectional drawing corresponding to FIG. 11 which shows schematically the structure of the principal part of the guidance means of the seatbelt apparatus which concerns on 3rd Embodiment. It is front sectional drawing corresponding to FIG. 13 which shows the state of the guidance | induction means in the state which the buckle reached | attained the predetermined position of the back side of a seat. It is an enlarged plan view which shows roughly the structure of the principal part of the guidance means of the seatbelt apparatus which concerns on 3rd Embodiment. It is a perspective view of a slide collar. It is front sectional drawing which shows roughly the structure of the principal part of the guidance means of the seatbelt apparatus which concerns on 4th Embodiment. It is front sectional drawing corresponding to FIG. 17 which shows the state of the guidance | induction means in the state which the buckle reached | attained the predetermined position of the back side of a seat. FIG. 18 is a front cross-sectional view corresponding to FIG. 17 schematically showing a modification of the main part of the guiding means of the seat belt device according to the fourth embodiment. FIG. 18 is a front cross-sectional view corresponding to FIG. 17 schematically showing another modification of the main part of the guiding means of the seatbelt device according to the fourth embodiment. It is a top view which shows roughly the structure of the principal part of the guidance means of the seatbelt apparatus which concerns on 5th Embodiment. It is front sectional drawing schematically of the structure of the principal part of the guidance means of the seatbelt apparatus which concerns on 5th Embodiment. It is front sectional drawing corresponding to FIG. 11 which shows the state of the guidance | induction means in the state which the buckle reached | attained the predetermined position of the back side of a seat. It is a reverse view which shows the structure of the guide means of the seatbelt apparatus which concerns on 6th Embodiment. It is a reverse view corresponding to FIG. 24 which shows the state which the buckle and the anchor moved forward. FIG. 25 is a back view corresponding to FIG. 24 showing a state where the anchor has moved beyond the initial position to the side of the seat. It is the front view which expanded the engagement part of the tongue of the webbing belt concerning a 6th embodiment. It is a perspective view which shows the state immediately after mounting | wearing the tongue with a buckle. It is a perspective view corresponding to FIG. 28 which shows the webbing belt mounting state in which the buckle has returned to the initial position. It is an expansion perspective view which shows the structure of the principal part of a guidance means roughly. It is sectional drawing which shows schematically the structure of the principal part of a guidance means. It is an expansion perspective view showing roughly other partial composition of the principal part of a guidance means. It is sectional drawing which shows the structure of a pretensioner. It is an expanded sectional view of a cancellation | release means. It is an expanded sectional view of the cancellation | release means in a cancellation | release state.

  Hereinafter, each embodiment of the present invention will be described with reference to FIGS. In the following description of each embodiment, the same reference numerals are given to parts that are basically the same as those of the previous embodiment, and a detailed description thereof is given. Omitted. Of the following embodiments, the first to fifth embodiments are used as reference examples for explaining the embodiments of the present invention, and the sixth embodiment is used as the reference. An embodiment of the invention will be described.

<Configuration of First Embodiment>
FIG. 1 is a side view of the entire configuration of a seat belt device 10 according to a first embodiment from the side of a vehicle.

  The seat belt device 10 shown in this figure includes a webbing take-up device 12. The webbing take-up device 12 includes a frame 14 fixed to the vehicle body below the center pillar of the vehicle. A spool 16 having an axial direction substantially along the vehicle longitudinal direction is supported on the frame 14 so as to be rotatable around its own axis. The longitudinal end of the long belt-like webbing belt 18 is locked to the spool 16.

  When the spool 16 rotates in one winding direction around its own axis, the spool 16 winds up the webbing belt 18 from the proximal end in the longitudinal direction, and the webbing belt 18 is wound up with the webbing belt 18 wound up. When pulled to the side, the webbing belt 18 wound around the spool 16 is pulled out, while the spool 16 rotates in the pulling direction opposite to the winding direction described above.

  On the other hand, the webbing take-up device 12 is provided with a motor 20 as spool driving means or tension reducing means. The motor 20 is connected to one end of the spool 16 via a plurality of gears and clutches in a gear box 22 constituting a speed reduction mechanism and a clutch mechanism. When the motor 20 is driven to rotate forward, the spool 16 rotates in the winding direction. When the motor 20 is driven in reverse, the spool 16 rotates in the pull-out direction.

  The webbing belt 18 whose base end is locked to the spool 16 extends along the center pillar to the upper side of the center pillar. A shoulder anchor 24 is attached to the vehicle body near the upper end of the center pillar. The shoulder anchor 24 includes a slip joint 26. The spool 16 extended to the vicinity of the upper end portion of the center pillar passes through the slit hole 28 of the slip joint 26 and is turned back and extended to the lower side of the vehicle. The front end portion of the spool 16 folded back by the slip joint 26 is integrally fixed to the front end portion of the anchor 30.

  The proximal end portion of the anchor 30 is integrally connected to the distal end side of the connection plate 32. As shown in FIG. 5, the base end side of the connecting plate 32 enters the inside of the frame 36 of the slide device 34 that constitutes the guiding means as the anchor moving means. The frame 36 is generally formed in a box shape whose longitudinal direction is along the front-rear direction of the seat (seat) 40, and the seat is on one side along the width direction of the seat 40 (outside in the vehicle width direction). It is integrally fixed to 40 base frames 42. A pair of support legs 44 and 46 are provided inside the frame 36.

  Each of the support legs 44 and 46 has a thickness direction along the front-rear direction of the seat 40, and the support leg 44 faces the support leg 46 on the rear side of the support leg 46 along the front-rear direction of the seat 40. A rod-shaped guide shaft 48 is accommodated inside the frame 36. The guide shaft 48 has a longitudinal direction along the front-rear direction of the seat 40, one end of which is supported by the support leg 44 and the other end is supported by the support leg 46. A rotating shaft 50 is disposed on the side (lower side) of the support leg 46.

  The longitudinal direction of the rotating shaft 50 is the same as the longitudinal direction of the guide shaft 48, and a male screw is formed on the outer periphery thereof. One end of both ends of the rotating shaft 50 passes through the support leg 44 and passes through the support leg 46. The rotary shaft 50 is supported by support legs 44 and 46 so as to be rotatable around its own central axis. In the vicinity of the support leg 44, a motor 52 as a driving means is disposed on the side (downward) of the rotary shaft 50. The output shaft 54 of the motor 52 whose axial direction is the same as the longitudinal direction of the guide shaft 48 and the rotary shaft 50 passes through the support leg 44, and a gear 56 is integrally provided at the tip thereof.

  A gear 58 having a larger diameter than the gear 56 and a larger number of teeth than the gear 56 is disposed on the side (upper) of the gear 56. The gear 58 is integrally attached to one end portion of the rotating shaft 50 that penetrates the support leg 44 and meshes with the gear 56. Therefore, when the motor 52 is driven and the output shaft 54 is driven forward or reversely, the rotary shaft 50 rotates forward or reversely around its own axis.

  Further, a slider 60 as a moving member is disposed between the support leg 44 and the support leg 46 inside the frame 36. A through hole having a slightly larger inner diameter than the outer diameter of the guide shaft 48 is formed in the slider 60, and the guide shaft 48 passes through the through hole. Further, the slider 60 is formed with a female screw hole penetrating in the same direction as the penetrating direction of the through hole through which the guide shaft 48 passes. A female screw is formed in the inner peripheral portion of the female screw hole formed in the slider 60. The internal thread hole formed in the slider 60 is penetrated by the rotary shaft 50 in a state where the external thread formed on the outer peripheral portion of the rotary shaft 50 is engaged with the internal peripheral internal thread.

  As described above, the guide shaft 48 passes through the through hole of the slider 60 and the rotary shaft 50 passes through the female screw hole. Therefore, when the rotary shaft 50 rotates forward, the slider 60 slides along the longitudinal direction of the guide shaft 48 and the rotary shaft 50 so as to approach the support leg 46, and when the rotary shaft 50 reverses, the slider 60 moves to the support leg 44. It slides along the longitudinal direction of the guide shaft 48 and the rotating shaft 50 so that it may approach.

  On the other hand, a long long hole 62 is formed in the upper wall portion of the frame 36 along the opposing direction of the support leg 44 and the support leg 46, and the base end side of the connecting plate 32 penetrates the long hole 62. It enters the inside of the frame 36. Support shafts 64 are formed on the slider 60 on both sides of the slider 60 along the width direction of the sheet 40 (only one side is shown in FIG. 5). The support shaft 64 has a substantially cylindrical shape whose axial direction is along the width direction of the sheet 40. The support shaft 64 is fitted in a circular hole formed in the connection plate 32 in the vicinity of the base end portion of the connection plate 32, and the support shaft 64 rotates the connection plate 32 around an axis whose axial direction is the width direction of the seat 40. Supports movable.

  A pair of biasing springs 66 and 68 are attached to the support shaft 64. The urging spring 66 is fixed to the support shaft 64 at the base end side, and the front end side is engaged with the surface of the connection plate 32 on the support leg 46 side, and the connection plate 32 is moved around the support shaft 64 to the support leg 44 side. It is energizing to tilt. On the other hand, the biasing spring 68 is fixed to the support shaft 64 at the base end side, and the front end side engages with the surface of the connection plate 32 on the support leg 44 side, and the connection plate 32 is moved around the support shaft 64 to the support leg 46. It is energized to tilt to the side. These urging springs 66 and 68 have substantially the same magnitude of the urging force for urging the connecting plate 32. For this reason, by receiving the urging force of these urging springs 66 and 68, The longitudinal direction (direction from the base end side to the front end side) of the connecting plate 32 is along the vertical direction of the sheet 40 (see FIG. 5).

  However, the end of the long hole 62 on the support leg 44 side is positioned sufficiently on the support leg 46 side with respect to the support leg 44, and when the slider 60 slides to the support leg 44 side, the support leg 44 is supported. The connecting plate 32 comes into contact with the end of the long hole 62 before the slider 60 comes into contact with the leg 44. Therefore, when the slider 60 slides until it comes into contact with the support leg 44, the connecting plate 32 resists the biasing force of the biasing spring 66 by the pressing reaction force from the long hole 62 as shown in FIG. It rotates so as to tilt toward the support leg 46 side.

  Further, the end of the long hole 62 on the support leg 46 side is located sufficiently on the support leg 44 side with respect to the support leg 46, and when the slider 60 slides to the support leg 46 side, the support leg 46 is supported. The connecting plate 32 contacts the end of the long hole 62 before the slider 60 contacts the leg 46. Therefore, when the slider 60 slides until it comes into contact with the support leg 46, the connecting plate 32 resists the urging force of the urging spring 66 by the pressing reaction force from the long hole 62 as shown in FIG. It rotates so as to tilt toward the support leg 44 side.

  On the other hand, as shown in FIG. 1, a tongue 70 is provided on the webbing belt 18 between the front end of the webbing belt 18 fixed to the anchor 30 and the folded portion of the slip joint 26. Corresponding to the tongue 70, a buckle 72 is provided on the opposite side of the webbing take-up device 12 and the anchor 30 via the sheet 40. The buckle 72 can be inserted with the tongue 70, and when the tongue 70 is inserted into the buckle 72, a latch provided inside the buckle 72 engages with the tongue 70 to restrict the removal of the tongue 70 from the buckle 72. .

  As shown in FIG. 4, when the webbing belt 18 is hung around the body of an occupant 74 seated on the seat 40 and the tongue 70 is attached to the buckle 72, the webbing belt 18 is attached to the occupant 74. In this mounted state, the webbing belt 18 is a shoulder webbing 76 that restrains the shoulder and chest of the occupant 74 between the tongue 70 and the slip joint 26, and the waist 70 of the occupant 74 is restrained between the tongue 70 and the anchor 30. The wrap webbing 78 is performed.

  On the other hand, as shown in FIG. 1, the buckle 72 is integrally fixed to the distal end side of the connecting plate 80. The base end side of the connecting plate 80 enters the frame 84 of the slide device 82 constituting the guiding means as the buckle moving means fixed to the base frame 42 on the side opposite to the frame 36 of the slide device 34 via the base frame 42. It is out. The slide device 82 has the same configuration as the slide device 34 except that the slide device 82 includes a frame 84 instead of the frame 36 of the slide device 34 and a motor 86 (see FIG. 7) as drive means instead of the motor 52. Is driven forward, the connecting plate 80 slides to the front side of the seat 40, and when the motor 86 is driven to rotate backward, the connecting plate 80 slides to the rear side of the seat 40.

  On the other hand, as shown in FIG. 7, the motor 20 of the webbing take-up device 12 is electrically connected to a driver 88, the motor 52 of the slide device 34 is electrically connected to a driver 90, and further the slide device 82 motor 86 is electrically connected to the driver 92. The drivers 88, 90, and 92 are electrically connected to a battery 94 mounted on the vehicle, and are also electrically connected to an ECU 96 that constitutes a guiding means as a control means.

  A forward rotation drive control signal Dc1 (hereinafter referred to as “signal Dc1”) and a reverse rotation drive control signal Dr1 (hereinafter referred to as “signal Dr1”) output from the ECU 96 are input to the driver 88. When the signal Dc1 output from the ECU 96 is switched from the Low level to the Hgih level, the driver 88 sets the motor 20 in the energized state to drive it in the normal direction. Further, when the signal Dr1 output from the ECU 96 is switched from the Low level to the Hgih level, the driver 88 drives the motor 20 in the reverse rotation state with the energized state.

  On the other hand, the forward rotation drive control signal Dc2 (hereinafter referred to as “signal Dc2”) and the reverse rotation drive control signal Dr2 (hereinafter referred to as “signal Dr2”) output from the ECU 96 are input to the driver 90. When the signal Dc2 output from the ECU 96 switches from the Low level to the Hgih level, the driver 90 sets the motor 52 in the energized state to drive it in the normal direction. Further, when the signal Dr2 output from the ECU 96 is switched from the Low level to the Hgih level, the driver 90 sets the motor 52 in the energized state and reversely drives it.

  Further, the forward rotation drive control signal Dc3 (hereinafter referred to as “signal Dc3”) and the reverse rotation drive control signal Dr3 (hereinafter referred to as “signal Dr3”) output from the ECU 96 are input to the driver 92. When the signal Dc3 output from the ECU 96 is switched from the Low level to the Hgih level, the driver 92 sets the motor 86 in the energized state to drive it in the normal direction. Further, when the signal Dr3 output from the ECU 96 is switched from the Low level to the Hgih level, the driver 92 sets the motor 86 in the energized state and reversely drives it.

  On the other hand, the ECU 96 is electrically connected to the seat sensor 98. The seat sensor 98 is provided, for example, on the seat cushion of the seat 40, and detects a load applied to the seat cushion of the seat 40 by the occupant 74. The seat sensor 98 outputs a seating detection signal Ss (hereinafter referred to as “signal Ss”). As described above, the seat sensor 98 detects the load applied to the seat cushion of the seat 40. However, when the load applied to the seat cushion exceeds a certain value, that is, a size that allows the passenger 74 to be considered seated on the seat 40. When the load on the seat cushion is applied, the signal Ss is switched from the Low level to the Hgih level.

  The ECU 96 is electrically connected to the buckle switch 100. The buckle switch 100 is provided inside the buckle 72. Further, a buckle signal Bs (hereinafter referred to as “signal Bs”) is output from the buckle switch 100. As described above, when the tongue 70 is inserted into the buckle 72, the removal of the tongue 70 from the buckle 72 is restricted, and the tongue 70 is attached to the buckle 72. Then, the signal Bs switches from the Low level to the Hgih level.

  Further, the ECU 96 is electrically connected to the limit switches 102, 104, 106, 108. The limit switch 102 and the limit switch 104 are provided inside the frame 36, a position detection signal Ls1 (hereinafter referred to as “signal Ls1”) is output from the limit switch 102, and a position detection signal Ls2 is output from the limit switch 104. (Hereinafter referred to as “signal Ls2”) is output. The slider 60 in the frame 36 is guided by the guide shaft 48 and the rotary shaft 50 and slides in the longitudinal direction of the guide shaft 48 and the rotary shaft 50. The slider 60 slides toward the support leg 44, and the slider 60 is supported by the support leg 44. The signal Ls1 is switched from the Low level to the Hgih level when coming into contact with 44, and when the slider 60 slides toward the support leg 46 and the slider 60 comes into contact with the support leg 46, the signal Ls2 is switched from the Low level to the Hgih level.

  On the other hand, the limit switch 106 and the limit switch 108 are provided inside the frame 84, a position detection signal Ls 3 (hereinafter referred to as “signal Ls 3”) is output from the limit switch 106, and a position detection is performed from the limit switch 108. A signal Ls4 (hereinafter referred to as “signal Ls4”) is output. The slider 60 in the frame 84 is guided by the guide shaft 48 and the rotary shaft 50 and slides in the longitudinal direction of the guide shaft 48 and the rotary shaft 50. The slider 60 slides toward the support leg 44, and the slider 60 is supported by the support leg 44. The signal Ls3 is switched from the Low level to the Hgih level when it comes into contact with 44, and when the slider 60 slides toward the support leg 46 and the slider 60 comes into contact with the support leg 46, the signal Ls4 is switched from the Low level to the Hgih level.

  The battery 94 includes a signal Ss output from the seat sensor 98, a signal Bs output from the buckle switch 100, a signal Ls1 output from the limit switch 102, a signal Ls2 output from the limit switch 104, and a limit switch 106. Based on the output signal Ls3 and the signal Ls4 output from the limit switch 108, the signals Dc1 to Dc3 and Dr1 to Dr3 are switched.

<Operation and Effect of First Embodiment>
Next, the operation and effect of the present embodiment will be described.

  When the passenger 74 is not seated on the seat 40 and the tongue 70 is not attached to the buckle 72, the slider 60 connected to the connecting plate 32 is in contact with the support leg 44 in the frame 36, The slider 60 connected to the connection plate 80 is in contact with the support leg 44 in the frame 84. In this state, the signal Ls1 output from the limit switch 102 and the signal Ls3 output from the limit switch 106 are at a high level, as shown in the portion from time T1 to T2 in the time chart of FIG. However, in this state, each of the signal Ss output from the seat sensor 98, the signal Bs output from the buckle switch 100, the signal Ls2 output from the limit switch 104, and the signal Ls4 output from the limit switch 108 is low level. It has become.

  When the occupant 74 is seated on the seat 40 and the seat sensor 98 detects the load acting on the seat 40 at this time, the signal Ss output from the seat sensor 98 is low as shown by the position of time T2 in FIG. Switch from level to high level. As described above, when the signal Ss is switched from the Low level to the High level, the ECU 96 switches the signal Dc2 and the signal Dc3 from the Low level to the High level. Thus, when the motor 52 and the motor 86 are driven forward, the slider 60 in the frame 36 moves away from the support leg 44 in the frame 36 and approaches the support leg 46, and the slider 60 in the frame 84 moves into the frame 84. The support leg 46 is moved away from the support leg 44.

  When each slider 60 is separated from the support leg 44, each of the signals Ls1 and Ls3 is switched from the High level to the Low level. Further, when each slider 60 slides so as to approach the support leg 46, the connection plate 32 or the connection plate 80 comes into contact with the end of the long hole 62 on the support leg 46 side. When each slider 60 slides further to the support leg 46 side from this state, the connection plate 32 and the connection plate 80 resist the urging force of the urging spring 68 by the pressing reaction force from the end of the elongated hole 62 on the support leg 46 side. Then, the support shaft 64 is rotated so as to be inclined toward the support leg 44 side.

  Further, when each slider 60 slides from this state until each slider 60 comes into contact with the support leg 46, each of the signals Ls2 and Ls4 is switched from the Low level to the High level. In response to this, the signals Dc2 and Dc3 are switched from the High level to the Low level, and the forward driving of the motors 52 and 86 is stopped. Further, in this state, the signal Dr1 is switched from the Low level to the High level for a certain time (between the times T3 and T4 in FIG. 8), whereby the motor 20 is reversely driven for a certain time. Thereby, winding of the webbing belt 18 by the spool 16 is loosened.

  Next, in this state, when the occupant 74 seated on the seat 40 attaches the tongue 70 to the buckle 72, the shoulder webbing 76 of the webbing belt 18 moves from the shoulder of the occupant 74 to the chest as shown in FIG. It is hung around. On the other hand, as described above, the slider 60 slides until the slider 60 comes into contact with the support leg 46, so that the buckle 72 and the anchor 30 are positioned in the vicinity of the front end portion of the seat cushion of the seat 40. For this reason, in this state, the lap webbing 78 is hung around the thigh or knee of the occupant 74.

  Further, as described above, when the tongue 70 is attached to the buckle 72, the signal Bs is switched from the Low level to the High level. In response to this, the signals Dr2 and Dr3 are switched from the Low level to the High level, and each of the motors 52 and 86 is driven in reverse. As shown in FIG. 3, by the reverse rotation of the motors 52 and 86, the slider 60 in the frame 36 moves away from the support leg 46 in the frame 36 and approaches the support leg 44, and the slider 60 in the frame 84 moves to the frame 84. The support leg 44 is moved away from the inner support leg 46. When each slider 60 is separated from the support leg 46, each of the signals Ls2 and Ls4 is switched from the High level to the Low level.

  As described above, when each slider 60 slides so as to approach the support leg 44, the connection plate 32 or the connection plate 80 comes into contact with the end of the elongated hole 62 on the support leg 44 side. When each slider 60 slides further to the support leg 44 side from this state, the connection plate 32 and the connection plate 80 resist the urging force of the urging spring 66 by the pressing reaction force from the end of the elongated hole 62 on the support leg 44 side. Then, the support shaft 64 is rotated so as to be inclined toward the support leg 46 side. Further, when each slider 60 slides from this state until each slider 60 comes into contact with the support leg 44, each of the signals Ls1 and Ls3 is switched from the Low level to the High level. In response to this, the signals Dr2 and Dr3 are switched from the High level to the Low level, and the reverse drive of the motors 52 and 86 is stopped.

  Further, in this state, the signal Dc1 is switched from the Low level to the High level for a certain period of time (between the times T5 and T6 in FIG. 8), whereby the motor 20 is driven to rotate forward for a certain period of time. As a result, the webbing belt 18 is wound around the spool 16, the slackness of the webbing belt 18 is eliminated, and the webbing belt 18 is attached to the body of the occupant 74 as shown in FIG.

  Here, when the tongue 70 was attached to the buckle 72, the lap webbing 78 was hung around the thigh or knee of the occupant 74. From this state, as described above, each slider 60 slides until each slider 60 comes into contact with the support leg 44. As a result, the anchor 30 and the buckle 72 move to the rear of the seat 40, and when this movement is completed. When the spool 16 winds up the webbing belt 18, the lap webbing 78 on the thigh or knee is in contact with the thigh or knee, and corresponds to the pelvis of the occupant 74 rearward. The lap webbing 78 moves toward the position (the “pelvic position” in the claims).

  In this way, the lap webbing 78 is guided to the mounting position corresponding to the pelvis of the occupant 74 (the “pelvis position” in the claims), so that, for example, as shown in FIG. Even when the seated occupant 74 is a pregnant woman and it is difficult to confirm the mounting position of the lap webbing 78, the lap webbing 78 can be easily mounted at or near the ideal mounting position corresponding to the pelvis.

  In the present embodiment, both the anchor 30 and the buckle 72 are slid in the front-rear direction of the seat 40 by the slide device 34 and the slide device 82, but either one of the slide device 34 and the slide device 82 is used. Only one of the anchor 30 and the buckle 72 may be slid in the front-rear direction of the seat 40.

  Further, according to the present embodiment, when each slider 60 slides and each of the signals Ls2 and Ls4 is switched from the Low level to the High level until each slider 60 comes into contact with the support leg 46, the motor 20 is kept for a certain period of time. Although the configuration is such that the reverse drive is performed, the start timing of the reverse drive of the motor 20 (that is, the switching timing of the signal Dr1 from the low level to the high level) is changed from the low level of each of the signals Ls2, Ls4 to the high level. Instead of switching, when the tongue 70 is attached to the buckle 72, that is, the signal Bs may be switched from the Low level to the High level.

  Furthermore, when the switching from the low level to the high level of the signal Bs is set as the start timing of the reverse drive of the motor 20, the reverse drive start timing of the motor 20 and the reverse drive start of the motors 52 and 86 are started. The timing (that is, the timing of switching from the low level to the high level of the signals Dr2 and Dr3) may be the same, for example, when the reverse drive of the motor 20 is completed, the reverse drive of the motors 52 and 86 is started. May be.

  Further, in this embodiment, when the tongue 70 is mounted on the buckle 72 and each slider 60 slides until each slider 60 comes into contact with the support leg 44, the motor 20 is driven to rotate forward so that the spool 16 has a webbing belt. However, the timing of forward driving of the motor 20 is not limited to the time when each slider 60 comes into contact with the support leg 44. For example, the configuration is such that the front of the vehicle is monitored and the motor 20 is driven to rotate forward to eliminate the slack of the webbing belt 18 when the distance to other vehicles or obstacles in front of the vehicle is less than a predetermined distance. There may be.

  Furthermore, in the present embodiment, the present invention is applied to a so-called “three-point seat belt device” in which the longitudinal base end side of the tongue 70 is the shoulder webbing 76 and the longitudinal front end side of the tongue 70 is the lap webbing 78. The present invention can be applied to any configuration provided with at least the lap webbing 78, and the present invention is not limited to the so-called “three-point seat belt device”.

<Configuration of Second Embodiment>
FIG. 9 is a plan view showing the configuration of the main part of the seat belt device 140 according to the second embodiment. As shown in this figure, the seat belt device 140 includes a slide device 142 that constitutes a guiding means as a buckle moving means instead of the slide device 82 in the first embodiment. The slide device 142 includes a frame 144 corresponding to the frame 84 of the slide device 82 in the first embodiment. A long hole 146 is formed in the upper wall of the frame 144. The long hole 146 includes a long hole rear portion 148.

  The long hole rear portion 148 is formed directly above the guide shaft 48 on the front side of the center portion of the frame 144 along the front-rear direction of the seat 40. The long hole rear part 148 has a longitudinal direction along the front-rear direction of the sheet 40, and the width dimension of the long hole rear part 148 along the width direction of the sheet 40 is slightly larger than the thickness dimension of the connecting plate 80. ing. From the rear end portion of the long hole rear portion 148 along the front-rear direction of the long hole rear portion 148, an inclined portion 150 constituting the long hole 146 is formed together with the long hole rear portion 148.

  The inclined portion 150 has a longitudinal direction inclined in the left-right direction with respect to the front-rear direction of the seat 40, and the rear end side approaches the seat 40 with respect to the front end side of the inclined portion 150 along the front-rear direction of the seat 40. Yes. From the rear end portion of the inclined portion 150, a long hole rear portion 148 that forms a long hole 146 together with the long hole rear portion 148 and the inclined portion 150 is formed. The longitudinal direction of the long hole rear part 152 is along the front-rear direction of the sheet 40, and the width dimension of the long hole rear part 152 along the width direction of the sheet 40 is sufficiently larger than the width dimension of the long hole rear part 148.

  As shown in FIG. 10, a rotating arm 154 is provided inside the frame 144 having the above-described configuration. The rotation arm 154 is supported by the support shaft 64 so as to be rotatable about an axis whose axial direction is the width direction of the seat 40, and both ends of the urging springs 66 and 68 are locked. Support shafts 156 are formed at both ends of the pivot arm 154 on the upper end side of the pivot arm 154 and along the front-rear direction of the seat 40. In the present embodiment, the base end portion of the connecting plate 80 that enters the inside of the frame 144 from the long hole 146 is supported by the support shaft 156 so as to be rotatable around an axis whose axial direction is the front-rear direction of the seat 40. It is indirectly connected to the slider 60 via a shaft 156 (rotating arm 154).

<Operation and Effect of Second Embodiment>
In the present embodiment configured as described above, the slider 60 slides in the front-rear direction of the seat 40 as the rotating shaft 50 rotates. Here, as described above, the long hole rear portion 148 of the long hole 146 has a width dimension along the width direction of the seat 40 that is slightly larger than the thickness dimension of the connecting plate 80, and the guide shaft 48 has a It is formed directly above. For this reason, as shown in FIG. 11, in the state in which the connecting plate 80 passes through the long hole rear portion 148, the longitudinal direction of the connecting plate 80 is along the vertical direction of the sheet 40.

  When the rotary shaft 50 rotates from the state where the connecting plate 80 passes through the long hole rear portion 148 and the slider 60 slides rearward, the connecting plate 80 reaches the inclined portion 150 of the long hole 146. Since the inclined portion 150 is inclined with respect to the front end side so that the rear end side is positioned on the seat 40 side, when the buckle 72 slides backward with the connecting plate 80 entering the inclined portion 150, The edge portion interferes with the connecting plate 80 and presses the connecting plate 80 toward the center in the width direction of the sheet 40.

  In this way, the connecting plate 80 pressed against the edge of the inclined portion 150 rotates around the support shaft 156. Accordingly, the connecting plate 80 is inclined so as to gradually fall toward the seat 40 as the slider 60 slides backward. As shown in FIG. 12, the connection plate 80 is maintained in an inclined state toward the seat 40 when the connection plate 80 enters the long hole rear portion 152 from the inclined portion 150. For this reason, in a state where the connecting plate 80 is positioned up to the rear end portion of the long hole 146, the buckle 72 connected to the upper end portion of the connecting plate 80 is inclined toward the center in the width direction of the seat 40 at the tongue insertion port side. For this reason, the buckle 72 approaches the waist part of the occupant 74 seated on the seat 40, and the lap webbing 78 can restrain the occupant 74's waist part more effectively.

<Configuration of Third Embodiment>
Next, a modification of the second embodiment will be described as a third embodiment.

  13 and 14, the main part of the configuration of the slide device 162 constituting the seat belt device 160 according to the present embodiment is a front surface corresponding to FIGS. 11 and 12 for explaining the second embodiment. It is shown by a cross-sectional view. As shown in these drawings, the slide device 162 includes a slide collar 164. As shown in FIG. 16, a pair of guide grooves 166 is formed in the slide collar 164. Each guide groove 166 opens at both ends of the slide collar 164 in the longitudinal direction (arrow L direction in FIG. 16) and opens toward the outer side in the width direction of the slide collar 164 (arrow W direction in FIG. 16). The both edges of the long hole 146 facing the inner width direction of the long hole 146 enter the inside of each guide groove 166 inside.

  As shown in FIGS. 13 and 16, the inner width dimension of both guide grooves 166 along the height direction of the slide collar 164 (the direction indicated by the arrow H in FIG. 16) gradually decreases toward the bottom surface 166A. However, the inner width dimension of the guide groove 166 on the bottom surface 166A is sufficiently larger than the thickness dimension of the upper wall of the frame 144 in which the long hole 146 is formed. In addition, the bottom surface 166A of the guide groove 166 is formed so that the center of curvature is the center of the curvature of the slide collar 164 in the width direction inner side of the guide groove 166 (in the direction of arrow H in FIG. 16) in the front view. The curved surface is curved so as to project outward in the width direction.

  Further, as shown in FIG. 15, the bottom surface 166 </ b> A in the plan view is outward in the width direction with the substantially central portion in the longitudinal direction (in the direction of arrow L in FIG. 16) as the center of curvature. Curved to overhang. Moreover, the maximum length from the bottom surface 166A of one guide groove 166 to the bottom surface 166A of the other guide groove 166 along the width direction of the slide collar 164 is set to be slightly shorter than the inner width dimension of the long hole 146. Has been.

  For this reason, when the slide collar 164 tries to displace in the inner width direction of the long hole 146, the edges on both sides in the inner width direction of the long hole 146 that have entered the inside of the guide groove 166 interfere with the bottom surface 166A, and the inside of the long hole 146 , The displacement of the slide collar 164 in the inner width direction of the long hole 146 is restricted. As a result, the slide collar 164 is guided by the long hole 146 and slides in the longitudinal direction of the long hole 146.

  Moreover, as described above, both guide grooves 166 are tapered, and the inner width dimension of the guide groove 166 on the bottom surface 166A is sufficiently larger than the thickness dimension of the upper wall of the frame 144, so that each guide groove 166 faces each other. Of the pair of inner side surfaces 166B and 166C, the inner side surface 166B of one guide groove 166 contacts the upper surface of the upper wall of the frame 144, and the inner side surface 166C of the other guide groove 166 contacts the lower surface of the upper wall of the frame 144. The slide collar until the inner surface 166C of one guide groove 166 contacts the lower surface of the upper wall of the frame 144 and the inner surface 166B of the other guide groove 166 contacts the upper surface of the upper wall of the frame 144. 164 can rotate.

  A through hole 168 is formed in the slide collar 164. The through-holes 168 are opened on both sides in the height direction of the slide collar 164 with the direction inclined at a predetermined angle in the width direction with respect to the height direction of the slide collar 164 as a through direction. The connecting plate 80 passes through the through hole 168, and the through hole 168 is slidable in the longitudinal direction of the connecting plate 80 by being guided by the connecting plate 80.

  As described above, the slide device 162 of the seat belt device 160 includes the slide collar 164, but basically has the same configuration as that of the slide device 142 in the second embodiment except that the slide collar 164 is provided. For this reason, a detailed description of parts other than the slide collar 164 is omitted.

<Operation and Effect of Third Embodiment>
When the rotating shaft 50 is rotated by the driving force of the motor 52 and the slider 60 slides in the longitudinal direction of the rotating shaft 50, the slide collar 164 slides in the longitudinal direction of the elongated hole 146 by being guided by the elongated hole 146. As described above, when the slide collar 164 is displaced in the inner width direction of the long hole 146, the edges on both sides in the inner width direction of the long hole 146 that enter the inside of the guide groove 166 interfere with the bottom surface 166A. The slide collar 164 is restricted from being displaced in the inner width direction of the long hole 146 in the hole 146. By restricting the displacement of the slide collar 164 in the inner width direction of the long hole 146 as described above, the connection plate 80 can be prevented from inadvertently swinging around the support shaft 156. The buckle 72 fixed to can be prevented from swinging.

  Further, for example, as shown in FIG. 15, the longitudinal direction of the inclined portion 150 is inclined with respect to the longitudinal direction of the long hole rear portion 148, and the slide collar 164 is moved from the long hole rear portion 148 to the inclined portion 150 as the slider 60 slides. When moving to, the edge of the inclined portion 150 interferes with the bottom surface 166 A of the guide groove 166, so that the slide direction of the slide collar 164 is inclined in the longitudinal direction of the inclined portion 150.

  Here, as described above, the bottom surface 166A of the guide groove 166 is curved so as to project outward in the width direction of the slide collar 164 in a plan view (shown in FIG. 15), so that the slide collar 164 has a long hole rear portion 148. When entering the inclined portion 150 from the edge, the edge portion of the inclined portion 150 does not come into contact with the corner portion of the bottom surface 166A. Therefore, when the slide collar 164 enters the inclined portion 150, the bottom surface 166A receives less resistance from the edge of the inclined portion 150, and the slide collar 164 can enter the inclined portion 150 smoothly.

  Further, when the slide collar 164 moves from the inclined portion 150 to the long hole rear portion 148 or when the slide collar 164 moves from one of the long hole rear portion 152 and the long hole rear portion 148 to the other, The same effect as when the slide collar 164 moves from the long hole rear part 148 to the inclined part 150 can be obtained, and the same effect can be obtained.

  Further, when the slide collar 164 moves in the inclined portion 150, the slide collar 164 slides gradually in the width direction of the frame 144 while sliding in the longitudinal direction of the frame 144 (that is, the longitudinal direction of the rotary shaft 50). . As described above, the slide collar 164 slides in the width direction of the frame 144, thereby rotating the connecting plate 80 around the support shaft 156.

  By the way, when the connecting plate 80 rotates around the support shaft 156, the slide collar 164 also rotates around the support shaft 156. Here, both guide grooves 166 of the slide collar 164 are formed in a tapered shape, and the inner side surface 166B of one guide groove 166 abuts on the upper surface of the upper wall of the frame 144 and the inner side surface 166C of the other guide groove 166. Is in contact with the lower surface of the upper wall of the frame 144, the inner surface 166C of one guide groove 166 is in contact with the lower surface of the upper wall of the frame 144, and the inner surface 166B of the other guide groove 166 is above the frame 144. The slide collar 164 can be rotated with the connecting plate 80 until it comes into contact with the upper surface of the wall. Thereby, the connection plate 80 can be smoothly rotated around the support shaft 156.

  In addition, the bottom surface 166A of the guide groove 166 has the guide groove 166 projecting outward in the width direction with the substantially central portion in the height direction of the slide collar 164 on the inner side in the width direction of the guide groove 166 when viewed from the front. Thus, the slide collar 164 can rotate about the bottom surface 166A in a state where the bottom surface 166A is in contact with the edge of the inclined portion 150. For this reason, it is possible to restrict rattling of the connection plate 80 and the slide collar 164 when the slide collar 164 rotates and the connection plate 80 tilts or when the tilted connection plate 80 stands up.

  Further, as described above, when the slide collar 164 slides in the width direction of the frame 144, the distance between the support shaft 156 and the slide collar 164 changes. Here, since the through hole 168 is slidable in the longitudinal direction of the connecting plate 80 as guided by the connecting plate 80 as described above, it can follow the change in the distance between the support shaft 156 and the slide collar 164.

  Further, the bottom surfaces 166A of both guide grooves 166 of the slide collar 164 are curved so as to protrude outward in the width direction with the substantially center portion in the width direction and the center portion in the longitudinal direction as the center of curvature in the plan view. . That is, the bottom surfaces 166A of both guide grooves 166 have the same center of curvature and are located on the same circumference. Therefore, the inner width of each of the long hole rear portion 148, the inclined portion 150, and the long hole rear portion 152 constituting the long hole 146 can be made the same length.

  As described above, the seat belt device 160 has basically the same configuration as that of the second embodiment except that the seat belt device 160 includes the slide collar 164. The same effect as the embodiment can be obtained and the same effect can be obtained.

<Configuration of Fourth Embodiment>
Next, a fourth embodiment will be described.

  FIG. 17 is a plan view showing the configuration of the main part of the seat belt device 180 according to the present embodiment. As shown in this figure, the seat belt device 180 includes a slide device 182 that constitutes a guiding means as a buckle moving means instead of the slide device 82 in the first embodiment. The slide device 182 includes a guide shaft 184. The guide shaft 184 is provided in place of the guide shaft 48, and the longitudinal direction of the guide shaft 184 is formed in a bar shape along the longitudinal direction of the rotary shaft 50, as with the guide shaft 48.

  Unlike the guide shaft 48, both ends of the guide shaft 184 are supported by the support leg 44 and the support leg 46 on the side of the rotary shaft 50 along the width direction of the seat 40. Further, the slide device 182 includes a slider 186. The slider 186 is formed with a through hole through which the guide shaft 184 passes and a female screw hole through which the rotary shaft 50 penetrates. The rotary shaft 50 rotates in the same manner as the slider 60 in the first embodiment, so that Slide in the direction.

  A flat base 188 whose thickness direction is along the vertical direction of the sheet 40 is integrally attached to the slider 186. A support wall 190 extends downward from the end of the base 188 on the center side in the width direction of the sheet 40. A pinion gear 192 is provided on one side in the thickness direction of the support wall 190 (on the side of the support wall 190 on the outer side in the width direction of the seat 40). The pinion gear 192 is rotatably supported around an axis whose axial direction is the width direction of the seat 40.

  Below the pinion gear 192, a rack bar 194 is fixed to the support leg 44, the support leg 46, and the like. The rack bar 194 has a longitudinal direction along the longitudinal direction of the rotary shaft 50, and the rack bar 194 is meshed with rack teeth formed on the upper surface thereof. For this reason, when the slider 186 slides in the front-rear direction of the seat 40 by the rotation of the rotary shaft 50, the pinion gear 192 engages with the rack bar 194 while sliding in the front-rear direction of the seat 40 together with the slider 186, so Rotate around the axis. An external gear 196 is provided on the opposite side of the pinion gear 192 through the support wall 190. Coaxially and integrally connected to the shaft portion of the pinion gear 192 supported by the support wall 190 in a state of passing through the support wall 190, the gear 196 rotates when the pinion gear 192 rotates.

  On the other hand, a support wall 198 is erected upward from an end portion of the base 188 on the support wall 190 side. On the side of the center side surface of the support wall 198 along the width direction of the seat 40, the gear 200 has an axis around the width direction of the seat 40, that is, the same direction as the rotation axis direction of the gear 196 described above. Is supported rotatably. The gear 200 meshes with the gear 196, and the rotation of the gear 196 is transmitted to the gear 200 so that the gear 200 rotates. A rotating shaft 202 is provided on the opposite side of the gear 200 via the support wall 198.

  The rotary shaft 202 is formed in a rod shape whose longitudinal direction is along the width direction of the sheet 40, and a left-hand thread (reverse thread) is formed on the outer peripheral portion thereof. The rotary shaft 202 is coaxially and integrally connected to the shaft portion of the gear 200 rotatably supported by the support wall 198 in a state of passing through the support wall 198. When the gear 200 rotates, the rotary shaft 202 is connected. Rotate together with the rotating shaft 202. A support wall 204 is erected upward from the end of the base 188 opposite to the side on which the support wall 198 is formed, and the end of the rotary shaft 202 opposite to the support wall 198 rotates. It is supported by the support wall 204 freely.

  A guide shaft 206 is disposed above the rotation shaft 202. The guide shaft 206 is formed in a rod shape whose longitudinal direction is along the longitudinal direction of the rotary shaft 202, one end of which is supported by the support wall 198 and the other end is supported by the support wall 204. Further, a slider 208 is disposed between the support wall 198 and the support wall 204.

  The slider 208 is formed with a through hole through which the guide shaft 206 passes and a female screw hole having a female screw through which the rotary shaft 202 passes and a left screw (reverse screw) formed on the outer periphery of the rotary shaft 202 is screwed. In addition, the rotation of the rotating shaft 202 slides in the longitudinal direction of the rotating shaft 202, that is, the width direction of the sheet 40. Support shafts 210 are formed at both ends (only the front end side is shown in FIG. 17) of the slider 208 along the front-rear direction of the seat 40, and the base end portion (lower end portion) of the rotating arm 212 is the front-rear direction of the seat 40. Is supported so as to be rotatable around an axis having the axis direction of.

  A proximal end portion of a connection plate 80 (not shown in FIG. 17) is connected to the distal end side (upper end side) of the rotating arm 212. In addition, a long hole 214 is formed in the middle portion in the longitudinal direction of the rotating arm 212. The long hole 214 is elongated along the direction from the proximal end side to the distal end side of the rotation arm 212, and penetrates the rotation arm 212 in the front-rear direction of the seat 40. A guide rod 216 passes through the long hole 214. The guide rod 216 is formed in a rod shape whose longitudinal direction is along the front-rear direction of the seat 40.

  A pair of support walls 218 (only one is shown in FIG. 17) is formed on the support wall 204 corresponding to the guide rod 216. These support walls 218 face each other in the front-rear direction of the seat 40, one support wall 218 supports one end of the guide rod 216, and the other support wall 218 supports the other end of the guide rod 216. .

<Operation and Effect of Fourth Embodiment>
Next, the operation and effect of the present embodiment will be described.

  In the seat belt device 180, when the slider 186 is approaching the support leg 46, the upper side from the middle portion in the longitudinal direction of the rotating arm 212 extends above the seat 40 as shown in FIG. 17. . When the motor 86 operates in this state and the rotary shaft 50 rotates to slide the slider 186 in the rearward direction of the seat 40, the rotation of the pinion gear 192 engaged with the rack bar 194 is rotated via the gear 196 and the gear 200. Rotating shaft 202 rotates.

  When the slider 208 slides so as to approach the support wall 204 by the rotation of the rotating shaft 202, as shown in FIG. 18, the rotating arm in which the inner peripheral portion of the long hole 214 is pressed against the outer peripheral portion of the guide rod 216. 212 rotates around the support shaft 210 and inclines the tip side toward the center in the width direction of the sheet 40. Thereby, the buckle 72 connected to the tip of the rotating arm 212 via the connecting plate 80 is inclined toward the center in the width direction of the seat 40 at the tongue insertion port side. For this reason, the buckle 72 approaches the waist part of the occupant 74 seated on the seat 40, and the lap webbing 78 can restrain the occupant 74's waist part more effectively.

  In the present embodiment, the support shaft 210 of the slider 208 supports the rotary arm 212 so that the rotary arm 212 can rotate, and the guide rod 216 of the support wall 218 enters the elongated hole 214 formed in the rotary arm 212. It was a configuration. However, from the viewpoint of the present embodiment, in conjunction with the sliding movement of the slider 208 along the width direction of the seat 40, the rotation arm 212 rotates around an axis whose axial direction is the front-rear direction of the seat 40. However, the configuration is not limited to the above-described configuration as long as the rotating arm 212 is inclined or rises.

  Therefore, for example, as shown in FIG. 19, a support shaft 210 is provided on the support wall 218, and the slider 208 is rotatably supported on the support shaft 210, and a guide rod 216 is provided on the slider 208 to rotate. The guide rod 216 may be inserted into the long hole 214 of the arm 212.

  Further, for example, as shown in FIG. 20, instead of the rotation arm 212, one end side of the link 222 is rotatably supported by the support shaft 210, and the axial direction is the support shaft 210 instead of the guide rod 216. A support shaft 224 in the same direction is provided on the support wall 218, and the rotation arm 212 is rotatably supported by the support shaft 224. Further, the base end side of the rotation arm 212 and the other end side of the link 222 are connected to the support shaft 224 so as to be relatively rotatable by a connection shaft 226 whose axial direction is the same as that of the support shaft 210. Also good.

<Configuration of Fifth Embodiment>
Next, a fifth embodiment will be described.

  FIG. 21 is a plan view showing a configuration of a main part of the seat belt device 240 according to the present embodiment. As shown in this figure, the seat belt device 240 includes a slide device 242 that constitutes a guiding means as a buckle moving means in place of the slide device 82 in the first embodiment. As shown in this figure, a guide shaft 48 and a rotary shaft 50 are provided inside the connecting plate 80 of the slide device 242. However, the guide shaft 48 in the present embodiment is not disposed above the rotating shaft 50, but is disposed on the side of the rotating shaft 50 along the width direction of the seat 40.

  Further, the guide shaft 48 and the rotation shaft 50 in the present embodiment are different from the guide shaft 48 and the rotation shaft 50 in the first embodiment in that the longitudinal direction is the width of the seat 40 with respect to the front-rear direction of the seat 40. Therefore, the rear end side of the guide shaft 48 is displaced toward the seat 40 with respect to the front end side, and the rear end side of the rotary shaft 50 is on the side of the seat 40 with respect to the front end side. Is displaced.

  The seat belt device 240 includes a slider 244. The slider 244 is formed with a through hole through which the guide shaft 48 passes, and a female screw hole having a female screw through which the rotary shaft 50 passes and a male screw formed on the outer periphery of the rotary shaft 50 can be screwed. The slider 244 slides along the longitudinal direction of the rotating shaft 50 by rotating the rotating shaft 50 similarly to the slider 60 in the first embodiment. However, as described above, the longitudinal directions of the guide shaft 48 and the rotating shaft 50 are inclined in the width direction of the seat 40 with respect to the front-rear direction of the seat 40, so that the sliding direction of the slider 244 is also the front and rear of the seat 40. The sheet 40 is inclined in the width direction with respect to the direction.

  As shown in FIG. 22, a support portion 246 is formed on the upper portion of the slider 244, and a support shaft 248 whose axial direction is along the front-rear direction of the seat 40 is provided on the slider 244. A base end portion (lower end portion) of the rotation arm 250 is coupled to the support shaft 248 so as to be rotatable around an axis whose axial direction is the axial direction of the support shaft 248, that is, the front-rear direction of the seat 40. A proximal end portion of the connection plate 80 is connected to the distal end side (upper end side) of the rotating arm 250.

  A long hole 252 is formed in the turning arm 250. The long hole 252 passes through the turning arm 250 in the front-rear direction of the seat 40, and the longitudinal direction is along the longitudinal direction of the turning arm 250. A guide rod 254 passes through the long hole 252. The guide rod 254 is formed in a rod shape whose longitudinal direction is along the front-rear direction of the seat 40, one end in the longitudinal direction is supported by the seat 40, and the other end is supported by the support leg 46.

<Operation and Effect of Fifth Embodiment>
Next, the operation and effect of the present embodiment will be described.

  In the seat belt device 240, when the slider 244 is approaching the support leg 46, the longitudinal direction of the rotating arm 250 is along the vertical direction of the seat 40 as shown in FIG. In this state, the motor 80 is operated and the rotary shaft 50 is rotated, so that the slider 244 slides in a direction inclined toward the center in the width direction of the seat 40 with respect to the rear of the seat 40. When the slider 244 slides in this direction, the support shaft 248 that supports the rotating arm 250 is gradually displaced with respect to the guide rod 254 toward the center in the width direction of the seat 40.

  Along with such displacement, the guide rod 254 passing through the long hole 252 presses the inner peripheral portion of the long hole 252 toward the sheet 40. As a result, the pivot arm 250 pivots about the support shaft 248, and as shown in FIG. 23, the distal end side of the pivot arm 250 is tilted toward the seat 40 with respect to the proximal end side. Thereby, the buckle 72 connected to the tip of the rotating arm 250 via the connecting plate 80 is inclined toward the center in the width direction of the seat 40 at the tongue insertion port side. For this reason, the buckle 72 approaches the waist part of the occupant 74 seated on the seat 40, and the lap webbing 78 can restrain the occupant 74's waist part more effectively.

  In the present embodiment, the longitudinal direction of the guide rod 254 is the front-rear direction of the seat 40, whereas the longitudinal direction of each of the guide shaft 48 and the rotary shaft 50 is the seat on the rear end side with respect to the front end side. It is the structure which inclines so that it may be displaced to the 40 side. However, from the viewpoint of this embodiment, the longitudinal direction of the guide rod 254 is inclined with respect to the longitudinal direction of the guide shaft 48 and the rotary shaft 50, so that the slider 244 is positioned on the front end side of the seat 40. If the rotation arm 250 stands up, and the slider 244 is positioned on the rear end side of the seat 40, the rotation arm 250 may be inclined to the seat 40 side.

  Therefore, for example, the longitudinal direction of each of the guide shaft 48 and the rotating shaft 50 is the longitudinal direction of the seat 40, and the longitudinal direction of the guide rod 254 is such that the rear end side of the guide rod 254 is displaced toward the seat 40 with respect to the front end side. A configuration in which the direction is inclined may be employed, and even with such a configuration, the same effects as those of the present embodiment described so far can be obtained.

<Configuration of Sixth Embodiment>
Next, a sixth embodiment will be described.

  FIG. 27 is an enlarged front view of the main part of the seat belt device 290 according to the present embodiment. As shown in this figure, the seat belt device 290 includes a webbing belt 292 in place of the webbing belt 18 in the first embodiment. The webbing belt 292 is basically formed in a long belt shape having flexibility similar to the webbing belt 18 in the first embodiment, and its longitudinal base end is the spool 16 of the webbing take-up device 12. It is locked to.

  The lower stopper 296 penetrates the webbing belt 292 in the thickness direction of the webbing belt 292 at the tip side of the webbing belt 292 from the portion where the webbing belt 292 passes through the slit hole 294 formed in the tongue 70, and the webbing belt 292 is in the thickness direction. It is fixed to 292. The thickness dimension of the lower stopper 296 along the thickness direction of the webbing belt 292 is sufficiently larger than the opening width dimension of the slit hole 294 along the thickness direction of the webbing belt 292. For this reason, the tongue 70 cannot be moved to the front end side of the webbing belt 292 by the interference of the tongue 70 with the lower stopper 296.

  On the other hand, an upper stopper 298 is formed on the base end side in the longitudinal direction of the webbing belt 292 from the passage portion of the slit hole 294. The upper stopper 298 is formed by folding the webbing belt 292 a plurality of times around an axis whose axial direction is the width direction of the webbing belt 292, and further stitching the folded portion integrally in the thickness direction. Has been. The thickness dimension of the upper stopper 298 along the thickness direction of the webbing belt 292 is sufficiently larger than the opening width dimension of the slit hole 294 along the thickness direction of the webbing belt 292. For this reason, the tongue 70 cannot be moved to the base end side of the webbing belt 292 by the interference of the tongue 70 with the upper stopper 298.

  When the tongue 70 is attached to the buckle 72, the longitudinal base end side of the webbing belt 292 is set to the shoulder webbing 76 with respect to the passing portion of the slit hole 294, and the longitudinal direction distal end side of the webbing belt 292 is set with respect to the passing portion of the slit hole 294. Although the upper stopper 298 cannot pass through the slit hole 294, the base end side in the longitudinal direction of the webbing belt 292 does not become the wrap webbing 78 because the upper stopper 298 cannot pass through the slit hole 294.

  Further, as shown in FIG. 24, the seat belt apparatus 290 is a slide apparatus that constitutes a guiding means as an anchor moving means and a buckle moving means instead of the slide apparatus 34 and the slide apparatus 82 in the first embodiment. 312 is provided. The slide device 312 includes a flat base plate 314. The base plate 314 is integrally attached to the seat cushion below the seat cushion (seat portion) constituting the seat 40. A motor actuator 320 is attached to the back surface of the base plate 314 (the surface opposite to the seat cushion).

  The motor actuator 320 includes a motor 322. A worm gear 324 is coaxially and integrally attached to the output shaft of the motor 322. A worm wheel 326 is arranged on the side of the worm gear 324. As shown in FIGS. 30 and 31, the worm wheel 326 is supported directly or indirectly on the base plate 314 so as to be rotatable about its own central axis with the axial direction substantially along the vertical direction of the seat 40. ing. The worm wheel 326 is engaged with the worm gear 324, and the rotational force when the worm gear 324 is rotated by the driving force of the motor 322 is transmitted to the worm wheel 326.

  Further, the worm wheel 326 is formed in a hollow shape, and an end on the opposite side to the base plate 314 is open. A cylindrical shaft member 328 is disposed coaxially with the worm wheel 326 inside the worm wheel 326. The shaft member 328 passes through a through hole 332 formed in the bottom wall 330 of the worm wheel 326 and is rotatably supported by the base plate 314. The shaft member 328 supported by the base plate 314 is rotatable about its own central axis, and supports a worm wheel 326 around the shaft member 328 so as to be rotatable.

  A spring locking portion 334 having a diameter larger than that of the shaft member 328 is provided coaxially and integrally with the shaft member 328 at the end of the shaft member 328 opposite to the bottom wall 330. A spiral spring 338 is accommodated between the spring locking portion 334 and the peripheral wall 336 of the worm wheel 326 in a state where the shaft member 328 passes through the through hole 332.

  One end of the spiral spring 338 (the end on the inner side in the spiral direction) is locked to the spring locking portion 334, and the other end is locked to the worm wheel 326. When the 336 is relatively rotated, the spring locking portion 334 is urged in a direction to cancel the relative rotation. A pulley 340 is formed coaxially and integrally with the spring locking portion 334 on the opposite side of the spring locking portion 334 from the shaft member 328. The pulley 340 is wound with one or more rounds of a wire 342 as a long annular and flexible connecting member.

  As shown in FIG. 24, a pulley 344 is provided at a position corresponding to one end in the width direction of the seat 40 and near the front in the front-rear direction of the seat 40 in the base plate 314. The pulley 344 is rotatably supported on the base plate 314 in a state where the rotation axis is set in the same direction as the rotation axis of the pulley 340. A guide rail 346 is provided on the rear side of the pulley 344 along the front-rear direction of the seat 40. As shown in FIG. 32, the guide rail 346 includes a base portion 348 fixed to the base plate 314 on the back surface side of the base plate 314.

  The base portion 348 is elongated along the front-rear direction of the seat 40, and further, on the rear side of the base portion 348 along the front-rear direction of the seat 40, the base portion 348 has a flat plate shape curved in a substantially L shape toward the other side in the width direction of the seat 40. Is formed. A pair of leg walls 350 extend from both ends in the width direction of the base 348 toward the lower side of the seat 40. From the end of the leg wall 350 opposite to the base portion 348, a lateral wall 352 extends in parallel to the base portion 348 toward the substantially central side in the width direction of the base portion 348, and the entire guide rail 346 has a cross section. The shape is a substantially C-shape opening downward from the sheet 40.

  A slider 354 is accommodated inside the guide rail 346. The slider 354 has a disk shape whose outer diameter is slightly smaller than the distance between the leg walls 350 and whose thickness is slightly smaller than the distance between the base 348 and the lateral wall 352. The displacement along the vertical direction is slidable in the longitudinal direction of the base portion 348 while being restricted by the base portion 348, both leg walls 350, and both lateral walls 352. A cylindrical neck portion 356 is formed coaxially and integrally with the slider 354 from the lower end in the thickness direction of the slider 354. The neck portion 356 has an outer diameter that is slightly smaller than the interval between the two lateral walls 352, and passes between the lateral walls 352 and protrudes below the guide rail 346.

  An anchor plate 358 is disposed on the opposite side of the neck portion 356 from the slider 354. The anchor plate 358 is rotatably fixed to the neck portion 356 by a bolt that penetrates the anchor plate 358 from the side opposite to the neck portion 356 and is screwed into a female screw hole formed in the neck portion 356. A slit hole 360 is formed in the anchor plate 358, and the leading end side of the webbing belt 292 is passed and folded. Thus, the front end side of the webbing belt 292 that is folded back through the slit hole 360 is stitched together in a state of being overlapped with the base end side with respect to the passing portion of the slit hole 360, and thereby, the anchor plate 358 is secured to the anchor plate 358. A webbing belt 292 is connected to the anchor plate 358 so as not to be detached.

  The slider 354 is formed with a clamp housing portion 362. The clamp housing portion 362 is a bottomed hole having a substantially rectangular shape in plan view, and is open on the surface opposite to the neck portion 356 of the slider 354. A wire clamp 364 is accommodated in the clamp accommodating portion 362. A wire 342 passes through the wire clamp 364, and the wire clamp 364 is integrally fixed to the passed wire 342.

  The slider 354 is formed with a groove 366 through which the wire 342 extending from the wire clamp 364 passes in a state where the wire clamp 364 is accommodated in the clamp accommodating portion 362. When the annular wire 342 is moved (rotated) in the longitudinal direction as a whole, the wire clamp 364 moves together with the wire 342. The moving wire clamp 364 presses the inner wall of the clamp housing portion 362, so that the slider 354 slides with the anchor plate 358 inside the guide rail 346.

  As described above, the base 348 (guide rail 346) is curved in a substantially L shape toward the other side in the width direction of the seat 40 on the rear end side of the seat 40, but on the other side in the width direction of the seat 40. A pulley 370 is disposed on the side of the end of the guide rail 346. Further, a pulley 372 is disposed on the other side in the width direction of the seat 40 and on the front end side of the seat 40. The pulleys 370 and 372 are rotatably supported by the base plate 314 with the rotation axis set in the same direction as the rotation axis of the pulley 340, and the wire 342 passing through the inside of the guide rail 346 from the pulley 344 is hung on the pulley 370. The sheet 40 is rotated and extends to the front side of the seat 40, and is further wound around the pulley 372 and folded back toward the rear side of the seat 40 along the end portion of the base plate 314 on the other side in the width direction of the seat 40.

  A pretensioner 380 is disposed between the pulley 370 and the pulley 372. As shown in FIGS. 24 and 33, the pretensioner 380 includes a cylinder portion 382. The cylinder portion 382 is formed in a cylindrical shape whose longitudinal direction is along the longitudinal direction of the wire 342 between the pulley 370 and the pulley 372. As shown in FIG. 33, the end of the cylinder portion 382 on the pulley 372 side is a bottom portion 384. Further, a cylindrical generator accommodating portion 386 that is curved in a substantially L shape toward the radially outer side of the cylinder portion 382 is continuously formed from the end portion of the cylinder portion 382 on the pulley 370 side. A gas generator 388 is accommodated in the generator accommodating portion 386. The gas generator 388 is operated to instantly generate gas and supply the generated gas to the inside of the cylinder portion 382.

  On the other hand, a piston 390 is arranged inside the cylinder part 382 so as to be slidable in the longitudinal direction of 0383 inside the cylinder part 382. The piston 390 includes a substantially disk-shaped main body 392 whose outer diameter is slightly smaller than the inner diameter of the cylinder portion 382. On the bottom 384 side of the main body 392, a lock portion 394 that constitutes a piston 390 together with the main body 392 is provided. The lock portion 394 is formed in a truncated cone shape such that at least a part on the main body 392 side gradually decreases in outer diameter dimension toward the main body 392.

  Such a frustoconical lock portion 394 has an outer diameter dimension sufficiently smaller than an outer diameter dimension of the main body 392 at the connection portion with the main body 392. An annular space surrounded by the lock portion 394, the main body 392, and the inner peripheral portion of the cylinder portion 382 is a steel ball housing portion 396. A plurality of steel balls 398 are housed in the steel ball housing portion 396. When the main body 392 abruptly slides away from the bottom portion 384, the steel ball 398 trying to stay in place due to inertia is guided to the outer peripheral portion of the lock portion 394 and gradually approaches the inner peripheral portion of the cylinder portion 382. .

  When the piston 390 slides in a direction away from the bottom portion 384 while the steel ball 398 is in contact with both the outer peripheral portion of the lock portion 394 and the inner peripheral portion of the cylinder portion 382, the steel ball 398 is moved to the outer periphery of the lock portion 394. The piston 390 is restricted from sliding in a direction to be deformed while being in contact with the inner portion of the cylinder portion 382 and separated from the bottom portion 384.

  Further, as shown in FIG. 33, the lock portion 394 is formed in a hollow shape having a substantially truncated cone-shaped steel ball housing portion 400 whose inner diameter dimension gradually decreases toward the main body 392 side. A wire 342 passing through the pretensioner 380 along the axial direction of the cylinder portion 382 passes through the piston 390 so as to pass inside the steel ball housing portion 400. A plurality of steel balls 402 are housed inside the steel ball housing portion 400. The steel ball 402 is disposed around a wire 342 that passes through the inside of the steel ball housing portion 400.

  The wire 342 that penetrates the piston 390 is basically movable relative to the piston 390 along the longitudinal direction of the wire 342. For this reason, even if the annular wire 342 moves (rotates) in the longitudinal direction, the main body 392 does not move along with the wire 342. However, when the piston 390 suddenly slides toward the bottom portion 384, the plurality of steel balls 402 guided to the inner peripheral surface of the steel ball housing portion 400 are held in pressure contact with the outer peripheral portion of the steel ball 402. As a result, when the piston 390 suddenly slides toward the bottom portion 384, the piston 390 slides toward the bottom portion 384 with the wire 342.

  On the other hand, as shown in FIG. 24, a pulley 412 is provided near the end of the base plate 314 on the other side in the width direction of the seat 40 and on the rear side in the front-rear direction of the seat 40. The pulley 412 is rotatably supported on the base plate 314 in a state where the rotation shaft is set in the same direction as the rotation shaft of the pulley 340. The wire 342 folded back by the pulley 372 is wound around the pulley 412 and returned to the pulley 340. A guide rail 422 is disposed between the pulley 372 and the pulley 412.

  The guide rail 422 is generally elongated along the end of the base plate 314 on the other side in the width direction of the seat 40, and the cross-sectional shape is substantially C-shaped opening downward like the guide rail 346. Yes. Between the pulley 372 and the pulley 412, the wire 342 passes inside the motor 322. As shown in FIG. 34, a slider 430 is disposed inside the guide rail 422. The slider 430 is formed with a clamp accommodating portion 434 that accommodates a block-shaped wire clamp 432 fixed to the wire 342 on the guide rail 422 side.

  The slider 430 is slidable in the longitudinal direction of the base portion 348 while the movement of the base portion 348 in the thickness direction and the width direction is restricted by the base portion 348 constituting the guide rail 422, both leg walls 350, and both lateral walls 352. However, the slider 430 is not formed with a groove 366, and the clamp accommodating portions 434 are opened at both ends along the longitudinal direction of the guide rail 422. For this reason, the wire clamp 432 in the clamp housing portion 434 can come out of the clamp housing portion 434 by moving relative to the slider 430 in the longitudinal direction of the guide rail 422.

  On the other hand, in the vicinity of the opening end of the clamp housing portion 434 on the base portion 348 side, a lock piece 436 as a releasing means is disposed inside the clamp housing portion 434. The guide rail 346 is pivotally supported by a support shaft 438 spanning the inner wall of the clamp housing portion 434 along the width direction of the base portion 348 so as to be rotatable about an axis whose axial direction is the width direction of the base portion 348. A front side of the guide rail 422 with respect to the support shaft 438 in the lock piece 436 is a spring locking portion 440. One end of the spring 422 is locked to the spring locking portion 440.

  The other end of the guide rail 422 is locked to the slider 430 on the side opposite to the base portion 348, and biases the spring locking portion 440 in a direction away from the base portion 348. An engagement piece 442 projects from the end of the lock piece 436 opposite to the spring locking portion 440 toward the opposite side of the base 348. Further, an engagement piece 444 is formed between the support shaft 438 and the engagement piece 442 so as to protrude toward the opposite side of the base portion 348.

  As shown in FIG. 34, in a state where the wire clamp 432 is positioned between the engagement piece 442 and the engagement piece 444, the wire clamp 432 moves relative to the slider 430 along the longitudinal direction of the guide rail 422. When the relative movement is attempted, the relative movement is restricted by interference with the engagement piece 442 or the engagement piece 444. As a result, in a state where the wire clamp 432 is positioned between the engagement piece 442 and the engagement piece 444, when the wire clamp 432 slides in the longitudinal direction of the guide rail 422 along with the wire 342, the slider 430 is also moved together. Slide.

  Further, a release restricting piece 446 is formed on the lock piece 436 on the engagement piece 442 side of the support shaft 438. The release restricting piece 446 protrudes from the lock piece 436 toward the base portion 348 and is pressed against the base portion 348 by the urging force of the spring 422. As shown in FIG. 34, when the wire clamp 432 is positioned between the engagement piece 442 and the engagement piece 444 and the release restriction piece 446 is in pressure contact with the base 348, the engagement piece 442, The lock piece 436 cannot be rotated in a direction in which the interference of the wire clamp 432 caused by 444 is released.

  However, in the present embodiment, as shown in FIG. 35, a release hole 448 is formed in the bottom portion 384 in the vicinity of the rear end portion of the guide rail 422 along the front-rear direction of the seat 40. When the release hole 448 and the release restriction piece 446 face each other, the lock piece 436 is rotated by the urging force of the guide rail 422 and the release restriction piece 446 enters the release hole 448. In this state, the interference of the wire clamp 432 by the engagement piece 442 is released, and the wire clamp 432 can move to the rear side of the seat 40.

  Further, when the wire clamp 432 presses the engagement piece 444 forward in a state where the interference by the wire clamp 432 is released, the lock piece 436 rotates against the urging force of the guide rail 422, and the release restriction is released from the release hole 448. As the piece 446 comes out, the slider 430 slides to the front side of the seat 40 by the pressing force from the wire clamp 432 received through the engaging piece 444 and the support shaft 438.

  On the other hand, an anchor plate 462 is fixed to the slider 430 by bolts 464 on the side opposite to the base 348 of the slider 430. The anchor plate 462 is bent to the upper side of the sheet 40 at the side of the sheet 40 on the other side in the width direction of the sheet 40, and a buckle 72 is integrally fastened and fixed to the tip thereof.

<Operation and Effect of Sixth Embodiment>
Next, the operation and effect of the present embodiment will be described.

  In the seat belt device 290, as shown in FIG. 24, the vicinity of the curved portion of the support leg 46 on the rear side in the front-rear direction of the seat 40 is the initial position of the slider 354, and the guide rail along the front-rear direction of the seat 40 The state where the release restricting piece 446 of the lock piece 436 enters the release hole 448 in the vicinity of the rear end portion of 422 is the initial position of the slider 430. When the seat sensor 98 detects that an occupant is seated on the seat 40, the motor 322 of the motor actuator 320 is driven to rotate forward.

  The forward driving force of the motor 322 is transmitted to the pulley 340 via the worm gear 324, the worm wheel 326, and the spiral spring 338 to cause the pulley 340 to rotate forward. When the pulley 340 rotates in the forward direction and the wire 342 rotates in the forward direction, the wire 342 moves to the front side of the seat 40 inside the guide rail 346 and the guide rail 422. 25, the slider 354 is guided by the guide rail 346 and slides toward the front end side of the seat 40, and the slider 430 is guided by the guide rail 422 and slides toward the front end side of the seat 40.

  When the slider 354 slides to the front end side of the seat 40, the tip of the webbing belt 292 locked to the anchor plate 358 moves to the front end side of the seat 40, and the slider 430 slides to the front end side of the seat 40. The buckle 72 fastened and fixed to the plate 462 moves to the front end side of the seat 40.

  Next, when the tongue 70 is inserted into the buckle 72 from this state, the state shown in FIG. 28 is obtained. In this state, when the buckle switch 100 detects that the tongue 70 is inserted into the buckle 72, the motor 322 of the motor actuator 320 is driven in reverse. The reverse driving force of the motor 322 is transmitted to the pulley 340 via the worm gear 324, the worm wheel 326, and the spiral spring 338, and reverses the pulley 340. When the wire 342 rotates in the reverse direction due to the reverse rotation of the pulley 340, the wire 342 moves to the rear side of the seat 40, that is, to the initial position side inside the guide rail 346 and the guide rail 422.

  In the state where both the slider 354 and the slider 430 are returned to the initial positions, the reverse rotation driving of the motor 322 is continued in the seat belt device 290. As described above, when the reverse drive of the motor 322 is continued, the slider 354 is guided by the guide rail 346 and slides to the other side in the width direction of the seat 40 from the curved portion of the guide rail 346. Thus, when the slider 354 slides to the other side in the width direction of the sheet 40, the leading end of the webbing belt 292 locked to the anchor plate 358 is on the other side in the width direction of the sheet 40 as shown in FIG. To the state shown in FIG.

  Here, the webbing belt 292 of the seat belt device 290 is provided with a lower stopper 296. If the upper stopper 298 is interfered with the slit hole 294 while the tongue 70 is held by the buckle 72, the lap webbing 78 of the webbing belt 292 cannot move to the base end side of the webbing belt 292. For this reason, even if the lap webbing 78 of the webbing belt 292 attached to the body of the occupant 74 is loosened in a state where the upper stopper 298 is interfered with the slit hole 294, the leading end of the webbing belt 292 is in the width direction of the seat 40. By moving to the other side, the lap webbing 78 is pulled and loosening of the lap webbing 78 is eliminated.

  Further, when the reverse rotation of the motor 322 is continued in the state where the looseness of the lap webbing 78 is eliminated in this way, the worm wheel 326 continues to reverse but the pulley 340 cannot be rotated. In this state, the spiral spring 338 is tightened, and the pulley 340 is biased in the reverse direction. Thus, the rotational torque in the reverse direction of the pulley 340 biased by the spiral spring 338 is detected by the torque sensor 368, and when the torque sensor 368 detects a rotational torque greater than a predetermined magnitude, the motor 322 stops. Is done. Thereby, the webbing belt 292 does not excessively tighten the occupant 74 body.

  Further, when the slider 354 is moved to the other side in the width direction of the sheet 40 from the initial position, the wire 342 attempts to release the slider 430 from the initial position. However, in the state where the slider 430 has returned to the initial position, the release restricting piece 446 enters the release hole 448 and the interference of the wire clamp 432 by the engagement piece 442 is released, so the slider 430 remains in the initial position. Only the wire clamp 432 is detached from the initial position along with the slide device 242. As described above, in the seat belt device 290, although the movement strokes of the anchor plate 358 to which the leading end of the webbing belt 292 is locked and the anchor plate 462 to which the buckle 72 is locked are different, the initial position of each is surely determined. Can be set.

  Moreover, as described above, in the seat belt device 290, when the occupant 74 is seated on the seat 40, the anchor plate 358 and the buckle 72 move forward, and when the tongue 70 is attached to the buckle 72, the anchor plate 358 is mounted. And the buckle 72 move forward. That is, since this point is the same as that of the first embodiment, the same effect as that of the first embodiment can be obtained and the same effect as that of the first embodiment can be obtained. Can do.

  Further, in this seat belt device 290, the movement of the anchor plate 358 and the movement of the buckle 72 are performed by one motor 322, so that the cost can be reduced.

  Furthermore, for example, when the body of the occupant 74 pulls the webbing belt 292 due to vibrations or the like when the vehicle travels, the urging force of the wound worm gear 324 rotates the pulley 340, and the wire 342 further rotates the webbing belt 292. Is moved to the other side in the width direction of the sheet 40. As a result, as described above, even if the webbing belt 292 is slackened, the slack can be quickly eliminated.

  On the other hand, for example, when the vehicle is suddenly decelerated and the pretensioner of the seat belt device 10 is actuated so that the webbing belt 292 is rapidly wound around the spool 16, the shoulder webbing 76 of the webbing belt 292 further contacts the occupant 74. Thus, the chest is firmly held from the shoulder of the occupant 74. Here, when the webbing belt 292 is wound around the spool 16 by a certain amount, the lower stopper 296 is interfered with the slit hole 294 and the movement of the webbing belt 292 toward the base end side is restricted on the lap webbing 78 side. For this reason, when the spool 16 winds the webbing belt 292 in this state, the tension of the webbing belt 292 increases in the shoulder webbing 76, and the chest part can be more firmly held from the shoulder part of the occupant 74.

  By the way, in the state where the lower stopper 296 is interfered with the slit hole 294, even if the spool 16 winds the webbing belt 292, the tension of the webbing belt 292 does not increase in the lap webbing 78.

  Here, in the seat belt device 290, the pretensioner 380 operates when the vehicle is suddenly decelerated. When the gas generator 388 is activated, gas is instantaneously generated from the gas generator 388, and the internal pressure of the cylinder portion 382 is rapidly increased. As the internal pressure of the cylinder part 382 increases, the piston 390 moves suddenly toward the bottom part 384. As described above, when the piston 390 suddenly moves toward the bottom portion 384, the plurality of steel balls 402 guided to the inner peripheral surface of the steel ball housing portion 400 are held in pressure contact with the outer peripheral portion of the steel ball 402.

  As a result, when the piston 390 suddenly slides toward the bottom portion 384, the piston 390 slides toward the bottom portion 384 with the wire 342. As the wire 342 slides toward the bottom portion 384, the anchor plate 358 further moves to the other side in the width direction of the sheet 40. As a result, the lap webbing 78 of the webbing belt 292 is more firmly attached to the waist of the occupant 74 and restricts the lumbar of the occupant 74 from moving substantially forward of the vehicle due to inertia during sudden deceleration of the vehicle.

  On the other hand, when the lap webbing 78 of the webbing belt 292 is suddenly pulled while the waist of the occupant 74 is about to move to the front side of the vehicle due to inertia at the time of sudden deceleration of the vehicle, the piston 390 slides suddenly to the side opposite to the bottom 384. . As described above, when the main body 392 suddenly slides away from the bottom portion 384, the steel ball 398 that tries to stay in place due to inertia is guided to the outer peripheral portion of the lock portion 394, and the inner periphery of the cylinder portion 382 is gradually increased. Approach the part.

  When the piston 390 slides in a direction away from the bottom portion 384 while the steel ball 398 is in contact with both the outer peripheral portion of the lock portion 394 and the inner peripheral portion of the cylinder portion 382, the steel ball 398 is moved to the outer periphery of the lock portion 394. The piston 390 is restricted from sliding in a direction to be deformed while being in contact with the inner portion of the cylinder portion 382 and separated from the bottom portion 384. In this way, the sliding of the piston 390 in the direction away from the bottom 384 is restricted, so that the lap webbing 78 of the webbing belt 292 withstands abrupt pulling by the occupant 74 and maintains the waist of the occupant 74.

  In addition, when the waist of the occupant 74 who is about to move to the front side of the vehicle pulls the lap webbing 78 suddenly, the shoulder webbing 76 side of the webbing belt 292 passes through the slit hole 294, but the webbing belt 292 is more than the slit hole 294. The upper stopper 298 formed on the webbing belt 292 on the base end side in the longitudinal direction cannot pass through the slit hole 294. For this reason, as shown in FIG. 29, when the upper stopper 298 is interfered with the inner peripheral portion of the slit hole 294, the lap webbing 78 does not become longer. Therefore, from this state, only the tension of the lap webbing 78 can be raised by the pretensioner 380, and the waist of the occupant 74 can be strongly held.

  As described above, in this embodiment, the increase in the tension of the webbing belt 292 due to the operation of both the pretensioner on the webbing take-up device 12 side and the pretensioner 380 is greatly applied to the shoulder webbing 76 and the lap webbing 78. Without being dispersed, the tension can be increased independently in both the shoulder webbing 76 and the lap webbing 78. For this reason, the body of the occupant 74 can be firmly held during the sudden deceleration of the vehicle, and the movement of the body of the occupant 74 toward the vehicle front side can be effectively restricted by the inertia during the sudden deceleration of the vehicle.

  Moreover, when a tensile force of a certain level or more is applied to the webbing belt 18 in a state where the spool 16 is locked by the locking mechanism of the webbing take-up device 12, the energy absorbing member such as the torsion shaft is deformed and the above-described tensile force is applied. In many cases, the webbing take-up device 12 is provided with a force limiter mechanism (load limiter mechanism) that allows the spool 16 to rotate.

  For this reason, when the occupant 74 pulls the webbing belt 18 with a tensile force of a certain level or more when the vehicle 74 suddenly decelerates, the force limiter mechanism is operated and the webbing belt 18 is pulled out. As a result, the shoulder webbing is performed. 76 grows.

  However, since the shoulder webbing 76 side of the upper stopper 298 does not pass through the slit hole 294, the shoulder webbing 76 extended as described above does not pass through the slit hole 294 and becomes the lap webbing 78. Further, a mechanism corresponding to a force limiter mechanism (load limiter mechanism) is not set on the lap webbing 78 side. For this reason, as described above, even when the body of the occupant 74 pulls the webbing belt 18 when the vehicle suddenly decelerates, the lap webbing 78 hardly stretches. Therefore, although it can move forward of the vehicle above the occupant's waist (that is, the chest, etc.), the occupant's waist is firmly held by the lap belt 78 and the lap webbing 78 attached to the occupant's waist is provided by the occupant. Can be prevented from shifting to the abdomen.

30 anchor 40 seat (seat)
70 tongue 72 buckle 74 occupant 290 seat belt device 292 webbing belt 312 slide device (guide means, anchor moving means, buckle moving means)
342 wire (connection member)
436 Lock piece (release means)

Claims (3)

An anchor provided on one side along the width direction of the seat from the seating position in the seat of the vehicle;
A buckle provided on the other side along the width direction of the seat from the seating position;
A state in which one end in the longitudinal direction is fixed to the anchor and a tongue held by the buckle by being attached to the buckle is provided on the other end side from one end in the longitudinal direction, and the tongue is attached to the buckle Then, between the anchor and the buckle, a webbing belt for restraining the waist of the occupant seated on the seat,
When the occupant is not seated in the seat, the anchor is moved forward from the initial position near the rear of the seat along the widthwise side edge of the seat when the seat is switched to the seated state. And moving the anchor to the rear of the seat along the side edge when the buckle is switched from the state where the tongue is not mounted to the state where the tongue is mounted. Guiding means for moving to the other side along the width direction of the seat ;
A seat belt device comprising: The guide includes a connecting member that has flexibility and is formed in a long and annular shape, and the anchor is connected and moved in the longitudinal direction by the driving force of the driving means to move the anchor. And a buckle movably provided along a side edge of the seat opposite to the side on which the anchor is provided, and the buckle is connected to the connecting means.
The seat belt device according to claim 1.   The seatbelt device according to claim 2, further comprising a release unit that releases the connection between the connection member and the buckle when the anchor moves further in the other direction from the initial position.

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