JP2010162995A - Seat belt device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat belt device with which an occupant seated on a seat easily attaches a webbing belt, attaining the constitution therefor at a low cost, and securing excellent operability for a long period of time. <P>SOLUTION: In the seat belt device 10, a webbing support body 34 and a buckle 82 are moved by fluid ejected from a bag 104 by a load applied when the occupant 30 sits on the seat 18, a tongue 48 is easily held, and the tongue 48 can be attached to the buckle 82. Also, the cost can be made inexpensive because a motor and an air pump for moving the webbing support body 34 and the buckle 82 as well as a sensor for detecting that the occupant 30 has sat on the seat 18 are not used thus. Because the bag 104 shrinks by the load applied when the occupant 30 is seated on the seat 18 and is restored by elasticity of a cushion 106, excellent operability for a long period of time is secured even if the mechanical strength of the bag 104 is not increased particularly. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

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

  In the seatbelt device disclosed in Patent Document 1 below, the buckle of the seatbelt device provided so as to be rotatable around an axis whose axial direction is the width direction of the seat is stored in a storage portion formed in the backrest portion of the seat. ing. Further, in this seat belt device, a long pawl operating member having flexibility is disposed in the seat portion of the seat. The front end of the pawl operating member is connected to the pawl. The match is resolved.

  Thereby, when the support lever is rotated by the biasing force of the spring, the buckle attached to the tip of the support lever comes out of the storage portion. Thus, when the occupant sits on the seat part, the buckle comes out of the storage part formed in the backrest part, so the occupant can easily attach the tongue provided on the webbing belt to the buckle, and the occupant can When the seat is not seated on the seat, the buckle is stored in the storage portion formed on the backrest portion, so that the buckle hardly interferes with the body of the passenger when the passenger sits on the seat portion.

  On the other hand, the seat back constituting the vehicle seat disclosed in Patent Document 2 below is provided with a movable member slidably forward of the seat back. Also, the seat back is provided with an air pump and a drive motor. When the pressure sensor provided on the seat cushion detects that an occupant is seated on the seat cushion, the drive motor is activated, and the drive force of the drive motor The air pump is activated. The air sent from the air pump inflates the air bag so that the air bag extends in front of the seat.

  The air bag inflated in this manner presses the movable member and protrudes from the seat back. The webbing belt (outer belt) is in contact with the tip of the movable member protruding in front of the seat back in this way, and the movable member protrudes in front of the seat back, so that the webbing belt is in contact with the movable member. Moves away from the front of the seat back.

  Thus, a part of the webbing belt moves forward, so that an occupant seated on the seat can easily grasp the webbing belt, and thus can easily wear the webbing belt. In addition, when the passenger is not seated on the seat, the movable member is stored in the seat back, and the webbing belt is in contact with the front surface of the seat back. It is hard to interfere with the body.

Japanese Laid-Open Patent Publication No. 2008-1276 Japanese Laid-Open Patent Publication No. 2004-299657

  However, in the configuration disclosed in Patent Document 1, a load is applied to the pawl operating member every time the occupant sits on the seat, and when the occupant moves away from the seat, the pawl operating member is pulled to the original state. Therefore, the pawl actuating member cannot secure good operability over a long period of time unless it has flexibility and sufficient durability against load and tension. Moreover, a pawl actuating member, a load acting member, and the like are disposed below the seat surface of the seat. Since such various members are arranged, the seat cushion becomes thin and the sitting comfort is deteriorated. Further, if a sufficient thickness is secured for the cushion of the seat while arranging such various members, the seat becomes thick.

  On the other hand, in the configuration disclosed in Patent Document 2, a drive motor and an air pump are required to push out the movable member, which increases the cost.

  In consideration of the above facts, the present invention allows a passenger seated in a seat to easily attach a webbing belt, and can realize a configuration for the seat belt at a low cost and ensure good operability over a long period of time. The purpose is to obtain a device.

  The seat belt device according to the first aspect of the present invention is provided on the rear or lower side of the seat back constituting the seat, on the body of the occupant seated on the seat from the side of the seating position of the occupant in the seat. A long belt webbing belt capable of restraining the occupant's body by being mounted, and the webbing provided at an initial position on the side of the seating position and above the seat back and passing through the initial position A webbing support for supporting the belt, and a tongue provided on the webbing belt is provided at an initial position on the side of the seating position and when the webbing belt is worn on the occupant's body. A buckle and a load from the occupant seated on the seat provided on the seat are deflated to release an internal fluid, and the pressure of the released fluid A bag body that moves at least one of the ebbing support body and the buckle to a mounting assist position that is spaced in a predetermined direction with respect to the initial position; and a bag body that is provided inside the bag body and receives the load. An elastic body that is compressed and is restored by elasticity when the load is eliminated, and that the bag body that has been deflated by the restoration is inflated to suck the fluid into the bag body.

  In the seat belt device according to the first aspect of the present invention, when a load is applied to the bag body by an occupant sitting on the seat, the bag body and the elastic body in the bag body are deflated and fluid is released from the bag body. . When the pressure of the fluid discharged from the bag is received by at least one of the webbing support and the buckle, the fluid is moved from the initial position to a mounting assist position spaced apart in a predetermined direction.

  The webbing support body has an initial position at the side of the seating position of the occupant and the upper side of the seat back constituting the seat, and supports the webbing belt passing through the initial position. When the webbing support receives the pressure of the fluid from the bag and moves from the initial position to a mounting assist position separated from the initial position, for example, toward the seat front side, the webbing belt support position by the webbing support becomes the mounting assist position. (For example, the front side of the seat). As a result, an occupant seated on the seat can easily grip the webbing belt, and the webbing belt can be easily attached.

  On the other hand, the buckle has an initial position lateral to the seating position of the occupant. When this buckle receives the pressure of the fluid from the bag body and moves from the initial position to a predetermined orientation, for example, a seating assist position separated from the front side of the seat or the upper side of the seat, the occupant seated on the seat can easily check the buckle. At the same time, the work for attaching the tongue provided on the webbing belt to the buckle becomes easy.

  Thus, when the occupant is seated on the seat, at least one of the webbing support and the buckle is moved from the initial position to the mounting assist position, so that the webbing belt can be easily mounted.

  On the other hand, when the occupant leaves the seat, the load that has been applied to the bag body is eliminated. In this way, when the load on the bag body is removed, the elastic body that has withered together with the bag body recovers from its compressed state by its own elasticity, and inflates the deflated bag body from the inside and sucks fluid into the bag body Let Thereby, when the bag body is restored and the occupant sits on the seat again, the bag body is deflated by the load and the fluid is discharged from the bag body.

  As described above, according to the present invention, since the fluid supply source to at least one of the webbing support and the buckle is a bag, the structure is simple and the detection is performed to electrically detect the load such as a load sensor. Since no means is required, the structure can be further simplified. In addition, since the deflated bag body is restored by the elasticity of the elastic body, the configuration for restoring the bag body is also simple.

  Furthermore, although the bag body is deformed so as to wither due to the load of the occupant, it is not a configuration in which excessive tensile force acts, and since restoration from the withered state is the elasticity of the elastic body, Excessive pulling force does not work. For this reason, even if the strength of the bag body is not set to be particularly high, the bag body has sufficient durability, and good operability can be ensured over a long period of time. In addition, since the elastic body only needs to restore the deflated bag body to its original shape, the elastic body can have the same characteristics as the cushion of the seat. For this reason, even if a bag or an elastic body is provided on the seat, the seat does not increase in size and the sitting comfort does not deteriorate.

  In the present invention, the movement from the initial position to the mounting assist position by the pressure of the fluid from the bag body may be at least one of the webbing support and the buckle. That is, only the webbing support or only the buckle may be moved from the initial position to the mounting assist position due to the pressure of the fluid from the bag, and further, the webbing support and the buckle may be moved. Both may be sufficient.

  Further, in the present invention, the bag body is configured to release a fluid upon receiving a load from an occupant seated on the seat, but the load from the occupant seated on the seat received by the bag body is that the occupant sits on the seat. The load received by the seat cushion constituting the seat may be the load received by the seat back when the occupant seated on the seat leans on the seat back.

  Furthermore, in the present invention, the elastic body is not particularly limited as long as the elastic body can restore the deflated bag body by elastic restoration. However, from the standpoint that the bag body in which the elastic body is accommodated is provided on the seat and receives the load of the occupant seated on the seat, the elastic body is unnecessary for the body of the occupant seated on the seat. It is preferable not to interfere. In this sense, a cushion material applied to a seat or the like is preferable as the elastic body.

  A seat belt device according to a second aspect of the present invention is the seat belt device according to the second aspect of the present invention, wherein the bag body is provided on a seat cushion constituting the seat, and the bag is operated in a vehicle sudden deceleration state. Fluid supply means for supplying fluid to the body and inflating the bag body is provided.

  In the seat belt device according to the second aspect of the present invention, the bag body is provided on the seat cushion constituting the seat. When the occupant sits on the seat, the bag body receives the load from the occupant and is deflated, and at least one of the webbing support and the buckle is moved from the initial position to the mounting assist position by the pressure of the fluid discharged from the bag body. Let

  As described above, the fluid supplied from the fluid supply means is supplied to the bag body that is deflated when the occupant is seated when the vehicle suddenly decelerates. Thus, when the fluid from the fluid supply means is supplied to the bag body, the deflated bag body expands and pushes up at least the seat surface of the seat cushion. As a result, the seating posture of the occupant on the seat is forcibly changed, and the restraint of the occupant's body by the webbing belt is improved.

  A seat belt device according to a third aspect of the present invention is the seat belt device according to the first or second aspect of the present invention, wherein the seat belt device is pivoted in the up-down direction of the seat at the upper end portion of the seat back or the rear side of the upper end portion. The webbing support body which is provided so as to be rotatable around an axis in a direction and whose front end is open toward the front side of the seat from the center of rotation is disposed at the upper end of the seatback or at the rear of the seatback. A tubular first connection means for connecting the bag body and the one that moves with the pressure of the fluid discharged from the bag body of the webbing support body and the buckle, and through which the fluid discharged from the bag body passes; A tubular second connection means for connecting the intermediate portion of the first connection means and the fluid supply means, and a fluid from the fluid supply means passes through, and a connection portion between the first connection means and the second connection means Set in Normally, the first connection means and the second connection means are closed to open the first connection means, and in the vehicle sudden deceleration state, the first connection means and the second connection means A connection portion between the first connection means and the second connection means by closing a connection portion between the webbing support body and the buckle that moves with the pressure of the fluid discharged from the bag body. And a valve that opens between the bag body.

  In the seat belt device according to the third aspect of the present invention, the bag body and the one that moves with the pressure of the fluid discharged from the bag body of the webbing support body and the buckle are connected by the tubular first connecting means. When the bag body is deflated by the load from the occupant seated on the seat and the fluid is discharged from the bag body, the fluid is sent into the first connecting means. As a result, the pressure of the fluid in the first connecting means rises and moves with at least one of the webbing support and the buckle (that is, the pressure of the fluid released from the bag of the webbing support and the buckle). Move to the side of the wearing assist position.

  On the other hand, a tubular second connection means is connected to an intermediate portion of the first connection means, and the fluid supply means is connected to the first connection means via the second connection means. A valve is provided at the connecting portion between the first connecting means and the second connecting means, and normally the first connecting means and the second connecting means are closed and the first connecting means is opened. The Accordingly, since the fluid discharged from the bag body is prevented or suppressed from flowing to the second connecting means side, the pressure of the fluid discharged from the bag body is efficiently used for the movement of the webbing support and the buckle. Can do.

  On the other hand, when the vehicle is suddenly decelerated, the valve moves between the connecting portion between the first connecting means and the second connecting means and the one that moves with the pressure of the fluid discharged from the bag body among the webbing support and the buckle. Is closed and the space between the connecting portion between the first connecting means and the second connecting means and the bag body is opened. Thereby, the fluid supplied from the fluid supply means can be prevented or suppressed from flowing toward the webbing support and the buckle, and the pressure of the fluid supplied from the fluid supply means can be effectively used for the expansion of the bag body. it can.

  A seat belt device according to a fourth aspect of the present invention is the seat belt device according to the third aspect, wherein the valve is urged in a direction to close between the first connecting means and the second connecting means. The bag moves out of the urging force by the pressure of the fluid sent from the fluid supply means, the connection portion between the first connection means and the second connection means, the webbing support and the bag. It closes between the one that moves with the pressure of the fluid discharged from the body and opens between the bag and the connecting portion between the first connecting means and the second connecting means.

  In the seat belt device according to the fourth aspect of the present invention, since the valve is biased in a direction to close between the first connecting means and the second connecting means, the first connecting means is normally opened. . On the other hand, when the vehicle is suddenly decelerated and fluid is sent from the fluid supply means to the second connection means, the pressure of the fluid causes the valve to close between the first connection means and the second connection means. Move against the energies of. The movement of the valve closes the connection between the connecting portion of the first connecting means and the second connecting means and the webbing support body and the buckle that moves with the pressure of the fluid discharged from the bag body, so that the first connection is established. The space between the connecting portion between the means and the second connecting means and the bag body is opened.

  Thus, since the valve moves with the pressure of the fluid sent from the fluid supply means, the electromagnetic control of the valve is unnecessary and the configuration is simple.

  A seat belt device according to a fifth aspect of the present invention is the seat belt device according to any one of the first to fourth aspects of the present invention, wherein the seat belt device is formed in a cylindrical shape having an open front end side, and the front end side and vice versa. The webbing support is accommodated so as to be slidable to the bottom side, and the fluid is supplied from the bottom side to increase the internal pressure and slide the webbing support to the tip side. A cylinder formed with a ventilation portion communicating on the inside and outside on the bottom side, and provided at the upper end portion of the seat back or in the vicinity of the upper end portion corresponding to the initial position of the webbing support, With the front end facing the front of the seat rather than the bottom, the cylinder is supported so as to be swingable about an axis whose axial direction is the vertical direction of the seat, and further, the vent is closed, When an operator wears the webbing belt, the air-flowing portion is formed by pulling the cylinder via the webbing belt and the webbing support, and swinging the cylinder about an axis whose axial direction is the vertical direction of the seat. A support member to be opened; and urging the webbing support to the bottom side of the cylinder, and when the occupant pulls the cylinder through the webbing belt and the webbing support when the webbing belt is mounted. Biasing means for biasing the webbing support in a direction opposite to the swinging direction of the cylinder;

  According to the seat belt device of the present invention as set forth in claim 6, the webbing support for supporting the webbing belt on the side of the seating position of the occupant in the seat for supporting the webbing belt and on the upper side of the seat back is the cylinder. Be contained. The cylinder is supported by the support means provided at or near the upper end of the seat back corresponding to the initial position of the webbing support so that the front end of the cylinder faces the front of the seat rather than the bottom.

  When the fluid released by the occupant sitting on the seat is supplied to the cylinder, the internal pressure of the cylinder rises, and the webbing support slides toward the tip side of the cylinder due to the increase of the internal pressure. As described above, since the front end side of the cylinder is located on the front side of the seat with respect to the bottom side, the webbing support is moved by the increase of the internal pressure of the cylinder, so that the webbing belt is supported by the webbing support. Move forward. This makes it easier for the occupant seated on the seat to grip the webbing belt, and as a result, the workability when the occupant wears the webbing belt is improved.

  Further, the supporting means supports the cylinder so as to be rotatable around an axis whose axial direction is the vertical direction of the seat. Moreover, since the support means is provided corresponding to the initial position of the webbing support, it is located outside the center side of the seating position of the occupant in the seat along the width direction of the seat. Since the occupant pulls the webbing belt toward the front side of the body when the webbing belt is worn, when the webbing belt is pulled by the occupant, the front end side of the cylinder passes along the width direction of the seat via the webbing belt and the webbing support. The seat is pulled toward the center of the seating position of the occupant, whereby the cylinder swings around the support position of the support means.

  When the cylinder swings in this way, the ventilation portion of the cylinder that has been closed by the support means is released. Furthermore, since the webbing support is urged by the urging means from the tip side to the bottom side of the cylinder, when the vent is opened as described above, the urging force of the urging means causes the bottom side of the cylinder to be The fluid in the cylinder is released from the vent to the outside of the cylinder by the webbing support that slides toward the outside. Thus, it returns to the bottom side of the webbing support cylinder.

  Further, the webbing support is moved in the direction opposite to the swinging direction of the cylinder when the occupant pulls the cylinder through the webbing belt and the webbing support when the webbing belt is mounted by the biasing force of the biasing means. It is energized. For this reason, when the webbing support returns to the bottom side of the cylinder and the cylinder swings, the ventilation portion is closed again by the support means. As a result, when the occupant sits on the seat again, the webbing support can slide to the tip end side of the cylinder, that is, the front of the seat by the pressure of the fluid.

  As described above, the seat belt device according to the present invention can improve the workability when the webbing belt is mounted.

It is a side view which shows roughly the structure of the principal part of the seatbelt apparatus which concerns on the 1st Embodiment of this invention. It is a top sectional view showing roughly the composition of one mode of wearing assistant means which constitutes the seatbelt device concerning a 1st embodiment of the present invention. 1 is a perspective view schematically showing a configuration of one aspect of a mounting assist unit that constitutes a seat belt device according to a first embodiment of the present invention. It is side surface sectional drawing which shows schematically the structure of the other one aspect | mode of the mounting assistance means which comprises the seatbelt apparatus which concerns on the 1st Embodiment of this invention. It is sectional drawing which shows roughly the structure of the valve applied with the seatbelt apparatus which concerns on the 1st Embodiment of this invention. FIG. 2 is a side view corresponding to FIG. 1 showing a state in which an occupant is seated on a seat. FIG. 3 is a plan cross-sectional view corresponding to FIG. 2 showing a state in which an occupant is seated on a seat. FIG. 4 is a perspective view corresponding to FIG. 3 showing a state in which an occupant is seated on a seat. FIG. 5 is a side cross-sectional view corresponding to FIG. 4 showing a state in which an occupant is seated on a seat. FIG. 3 is a plan sectional view corresponding to FIG. 2 showing a state in which the webbing support swings. FIG. 2 is a side view corresponding to FIG. 1 showing a state in which an occupant wears a webbing belt. It is a side view corresponding to FIG. 1 which shows the state which the fluid supply means act | operated. It is side surface sectional drawing which shows schematically the structure of the one aspect | mode of the mounting assistance means which comprises the seatbelt apparatus which concerns on the 2nd Embodiment of this invention. FIG. 14 is a side cross-sectional view corresponding to FIG. 13, showing a state in which the wearing assist means constituting the seat belt device according to the second embodiment of the present invention is activated.

<Configuration of First Embodiment>
(Configuration of shoulder side mounting assist device 12)
FIG. 1 is a schematic side view showing a configuration of a seat belt device 10 according to a first embodiment of the present invention.

  As shown in this figure, the seatbelt device 10 includes a shoulder side mounting assist device 12 that constitutes one mode of mounting assist means as shoulder side mounting assist means. As shown in FIGS. 2 and 3, the shoulder side mounting assist device 12 includes a cylinder 14. The cylinder 14 includes a cylindrical portion 16. The cylindrical portion 16 is formed in a cylindrical shape along the direction in which the axial direction intersects the vertical direction of the seat 18 (for example, the front-rear direction of the seat 18). On the proximal end side in the axial direction of the cylindrical portion 16, a substantially spherical shape or a cylindrical shaft portion 20 whose axial direction is along the vertical direction of the sheet 18 is formed. As shown in FIG. 2, the shaft portion 20 is formed in a hollow shape, and the inside thereof communicates with the inside of the tubular portion 16.

  On the other hand, a base portion 26 as a support means is provided behind the seat back 22 constituting the seat 18. The base portion 26 is disposed on the package tray trim 24 behind the seat back 22. For example, a vehicle skeleton member on the lower side of the package tray trim 24 by fastening means such as a bolt penetrating the package tray trim 24, It is fastened and fixed to a reinforcing member that reinforces the skeleton member.

  The base portion 26 is formed in a cylindrical shape whose axial direction is along the vertical direction of the seat 18, and the inner diameter dimension thereof is slightly larger than the outer diameter dimension of the shaft section 20. Further, a window portion 28 is formed in the base portion 26, and the inside and outside of the base portion 26 communicate with each other in the window portion 28. The opening width of the window portion 28 along the vertical direction of the base portion 26 is slightly larger than the outer diameter of the cylindrical portion 16, and the opening width of the window portion 28 along the circumferential direction of the base portion 26 is cylindrical. It is sufficiently larger than the outer diameter of the portion 16.

  The shaft portion 20 of the cylinder 14 is accommodated inside the base portion 26, and the cylindrical portion 16 of the cylinder 14 extends through the window portion 28 to the outside of the base portion 26. The shaft portion 20 can swing in the left-right direction of the seat 18 around the central axis of the base portion 26 until the cylindrical portion 16 interferes with the ends of the window portions 28 on both sides in the circumferential direction of the base portion 26.

  A state in which the cylindrical portion 16 is interfered with one end portion (left end portion in FIG. 2) of the window portion 28 along the circumferential direction of the base portion 26 (hereinafter, such a swing position of the cylinder 14 is referred to as “pull” for convenience. In the "swing position"), the cylindrical portion 16 is seated at the seating position of the occupant 30 in the seat 18 with the tip portion extending along the width direction of the seat 18 with respect to the base end portion (end portion on the shaft portion 20 side). The window portion 28 is set so as to be inclined toward the center of the window. In addition, the cylindrical portion 16 is interfered with the other end portion (the right end portion in FIG. 2) of the window portion 28 along the circumferential direction of the base portion 26 (hereinafter, the swing position of the cylinder 14 is referred to as the position of the cylinder 14). For convenience, the cylindrical portion 16 is inclined so that the distal end of the cylindrical portion 16 is inclined to the outside of the seating position of the occupant 30 in the seat 18 along the width direction of the seat 18. A window portion 28 is set.

  In this manner, the piston 32 is accommodated inside the tubular portion 16 attached to the base portion 26 so as to be slidable along the axial direction of the tubular portion 16. An arm 36 of the webbing support 34 extends continuously from the end surface of the piston 32 facing the distal end side of the tubular portion 16 toward the distal end side of the tubular portion 16. The distal end side of the arm 36 protrudes from the distal end of the cylindrical portion 16, and a slide anchor 38 is integrally attached to the distal end portion. An anchor hole 40 is formed in the slide anchor 38.

  The anchor hole 40 passes through the slide anchor 38 in the longitudinal direction of the arm 36. The anchor hole 40 is formed in a slit shape along the direction substantially orthogonal to both the longitudinal direction of the arm 36 and the axial direction of the base portion 26. The longitudinal dimension of the anchor hole 40 is as follows. The webbing belt 42 is larger than the width dimension of the webbing belt 42 formed in a long band shape, and the webbing belt 42 passes through the anchor hole 40. The base end side in the longitudinal direction from the passage portion of the anchor hole 40 of the webbing belt 42 is locked to a spool (not shown) of a webbing take-up device provided on the back side of the package tray trim 24 and the seat back 22. ing.

  On the other hand, the front end side of the webbing belt 42 extends below the seat 18 along the front surface of the seat back 22 from the portion that has passed through the anchor hole 40, and the front end constitutes the vehicle body below the seat 18. It is held by a skeleton member, a reinforcing member for reinforcing such a skeleton member, and an anchor fixed to a structural member constituting the vehicle body together with the skeleton member and the reinforcing member. Further, a tongue 48 is provided at an intermediate portion of the webbing belt 42 extending below the seat 18 along the front surface of the seat back 22. The occupant 30 seated on the seat 18 grips the tongue 48 and pulls the tongue 48 when the webbing belt 42 is mounted, and thereby pulls the webbing belt 42, so that the webbing belt 42 has the spool of the webbing take-up device. Pull out the wound part.

  On the other hand, as shown in FIG. 2, a vent hole 50 is formed in the peripheral wall of the shaft portion 20, and the inside and outside of the shaft portion 20 communicate with each other through the vent hole 50. However, as described above, since the shaft portion 20 is accommodated in the base portion 26, the opening of the vent hole 50 on the outer surface side of the shaft portion 20 is basically closed to the peripheral wall of the base portion 26. Corresponding to the vent hole 50, a vent hole 52 is formed in the peripheral wall of the base portion 26, and the inside and outside of the base portion 26 communicate with each other through the vent hole 52.

  The formation position of the vent hole 52 along the axial direction of the base portion 26 corresponds to the formation position of the vent hole 50. As shown in FIG. 10, in the state where the cylinder 14 is swung to the pull swing position. The vent hole 50 and the vent hole 52 are opposed to each other in the radial direction (radial direction) centered on the central axis of the base portion 26, whereby the inner side of the shaft portion 20 communicates with the outer side of the base portion 26.

  A locking piece 54 is formed on the base portion 26. The locking piece 54 is provided on the outer side in the width direction of the sheet 18 with respect to the base portion 26, and the distal end side thereof further extends outward in the width direction of the sheet 18. One end of a tension coil spring 56 as an urging means is locked to the distal end side of the locking piece 54. The other end of the tension coil spring 56 is locked in the vicinity of the tip of the arm 36, and when the piston 32 slides toward the tip of the cylindrical portion 16, the arm 36 is biased toward the shaft portion 20. At the same time, the arm 36 is urged so that the cylinder 14 around the central axis of the base portion 26 swings toward the swing initial position.

(Configuration of Buckle Side Mounting Assist Device 72)
On the other hand, as shown in FIG. 1, the seatbelt device 10 includes a buckle side mounting assist device 72 that constitutes one aspect of the mounting assist means as the buckle side mounting assist means. The buckle side mounting assist device 72 includes an arm 74. The arm 74 has a base 76. The base portion 76 is in the vicinity of the rear end portion of the seat cushion 78 constituting the seat 18, and the side where the shoulder side mounting assist device 12 is provided and the front end portion of the webbing belt 42 are locked via the seating position of the occupant 30 on the seat 18. It is provided on the opposite side of the anchor.

  The arm 74 is provided on the rear side of the seat cushion 78 and constitutes a skeleton member constituting the vehicle body, a reinforcement member for reinforcing such a skeleton member, and a structural member constituting the vehicle body together with the skeleton member and the reinforcement member. Is supported so as to be rotatable about an axis whose axial direction is the width direction. A buckle support piece 80 extends generally from the outer periphery of the base portion 76 toward the front side of the seat 18. A buckle 82 is fixed to the tip of the buckle support piece 80.

  As described above, when the occupant 30 seated on the seat 18 pulls the tongue 48, pulls the webbing belt 42 and hangs the webbing belt 42 in front of the body, and then attaches the tongue 48 to the buckle 82. Further, the base end side in the longitudinal direction of the webbing belt 42 is a shoulder belt that restrains from the shoulder of the occupant 30 to the vicinity of the waist through the chest, and the distal side of the webbing belt 42 restrains the waist of the occupant 30 from the tongue 48. Become a lap belt.

  Further, at a position spaced apart from the cylinder 86 around the rotation center of the arm 74 in the base portion 76, a pressed piece 84 extends from the outer peripheral portion of the base portion 76, and the pressed portion along the front-rear direction of the seat 18 is extended. When the pressed piece 84 is pressed from the back side of the piece 84, the arm 74 is rotated around the rotation center of the base 76, and the buckle 82 fixed to the tip of the buckle support piece 80 is raised. It pivots around the pivot center at 76.

  The arm 74 configured as described above is a torsion coil spring or the like that is twisted in a direction opposite to the rotation direction in which the buckle 82 rises around the rotation center of the base portion 76 (that is, the counterclockwise direction in FIG. 1). Therefore, in the state where the pressing force from the rear side of the pressed piece 84 is not applied to the pressed piece 84, as shown in FIGS. 1 and 4, the seat cushion 78 is urged by the member. The buckle 82 is located below the seat surface (upper surface), for example, in a pocket 83 formed in the seat cushion 78.

  On the other hand, a cylinder 86 is provided behind the pressed piece 84. The cylinder 86 is formed in a cylindrical shape whose axial direction is substantially along the front-rear direction of the seat 18. As shown in FIG. 4, a piston 88 is slidable along the axial direction of the cylinder 86. Contained. A rod 90 extends from the end of the piston 88 facing the front side of the seat 18 toward the front end side in the axial direction of the cylinder 86. The distal end side of the rod 90 protrudes from the distal end portion of the cylinder 86 to the outside of the cylinder 86, and the distal end portion of the rod 90 faces the pressed piece 84. For this reason, when the piston 88 slides toward the front end side of the cylinder 86, the front end portion of the rod 90 presses the pressed piece 84 toward the front side of the seat 18, thereby rotating the arm 74.

(Configuration of assist gas supply device 102)
On the other hand, as shown in FIG. 1, the seat belt device 10 includes an assist gas supply device 102 that constitutes a mounting assist means together with a shoulder side mounting assist device 12 and a buckle side mounting assist device 72. The assist gas supply device 102 includes a bag body 104. The bag body 104 is provided below the cushion material constituting the seat cushion 78.

  A cushion material 106 as an elastic body is provided inside the assist gas supply device 102. The cushion material 106 is made of a material softer than the cushion material constituting the seat cushion 78 described above. The cushion member 106 inflates the bag body 104 due to its elasticity. However, when a load against the elasticity of the cushion material 106 is applied to the bag body 104, the cushion material 106 is elastically deformed so as to be compressed, and the bag body 104 is deflated. When such a load is eliminated, the cushion material 106 is restored by elasticity, and the bag body 104 is expanded again by the restoration of the cushion material 106.

(Configuration of flow path mechanism 122)
Further, as shown in FIG. 1, the seat belt device 10 includes a flow path mechanism 122, and the above-described shoulder side mounting assist apparatus 12, buckle side mounting assist apparatus 72, and assist gas supply are provided by the flow path mechanism 122. The device 102 is connected.

  Specifically, the flow path mechanism 122 includes a tube 124 that constitutes a first connecting means. One end of the tube 124 is connected to the bag body 104 and communicates with the inside of the bag body 104. For this reason, as described above, when a load is applied to the bag body 104 and the bag body 104 is deflated, air in the bag body 104, which is one aspect of the “fluid” referred to in the claims, is sent to the tube 124. . On the other hand, the other end of the tube 124 is connected to the housing 128 of the three-way valve 126 and communicates with the inside of the housing 128.

  On the other hand, the flow path mechanism 122 includes a tube 130 that constitutes a first connecting means together with the tube 124. One end of the tube 130 is connected to the housing 128 and communicates with the inside of the housing 128. The tube 130 is bifurcated at an intermediate portion on the other end side, and the other end of the tube 130 passes through the base portion 26 and is connected to the shaft portion 20 and communicates with the inside of the shaft portion 20.

  On the other hand, the other end of the tube 130 is connected to the cylinder 86 and communicates with the inside of the cylinder 86. For this reason, when air is released from the bag body 104 to the tube 124 due to the load acting on the bag body 104 and withering, a part of the air in the tube 130 is supplied to the shaft section 20 and the shaft section 20. The other pressure of the air in the tube 130 is supplied to the cylinder 86 to increase the internal pressure of the cylinder 86.

  On the other hand, the flow path mechanism 122 includes a tube 132 as second connection means. One end of the tube 132 is connected to the housing 128 and communicates with the inside of the housing 128. The other end of the tube 132 is connected to an inflator 134 as fluid supply means, and communicates with the inside of the inflator 134. Inside the inflator 134, a gas generating agent that instantaneously generates a gas, which is one aspect of the fluid as claimed in the claims, by burning, an igniting agent that burns the gas generating agent, and further, this igniting agent. An ignition device for igniting is housed.

  The ignition device is connected to an ECU (not shown) as control means, and a seat cushion 78 constituting the seat 18 and a load detection means such as a pressure sensor provided on the seat back 22 are used to seat the occupant 30 on the seat 18. When the vehicle sudden deceleration state detecting means such as an acceleration sensor mounted on the vehicle detects the sudden deceleration state of the vehicle, the ECU activates the ignition device. When the ignition device is activated and the ignition agent is ignited, the gas generating agent is burned to generate gas. The gas generated in this manner is sent to the tube 132 and further sent into the housing 128.

  As shown in FIG. 5, a valve body 136 is provided inside the housing 128. As shown in FIG. 5A, the valve body 136 is a valve body such as a torsion coil spring not shown so as to open the space between the flow path mechanism 122 and the tube 130 and close the tube 132 side. It is energized by the energizing means.

  However, as described above, when the gas generated in the inflator 134 is fed into the tube 132, the valve body 136 rotates in the housing 128 against the biasing force of the valve body biasing means due to the pressure of this gas. To do. As shown in FIG. 5B, the valve body 136 thus rotated closes the space between the tube 130 and the tube 124 and opens the space between the tube 132 and the tube 124. Thereby, the gas generated in the inflator 134 passes through the tube 124 and is supplied to the bag body 104.

<Operation and Effect of First Embodiment>
In the state where the occupant 30 shown in FIG. 1 is not seated on the seat 18, as shown in FIGS. 2 and 3, the arm 36 is accommodated in the cylinder 14, and the slide anchor 38 is positioned above the seat back 22. Therefore, the webbing belt 42 extends downward along the seat back 22 in the vicinity of the front surface of the seat back 22 on the tip side of the slide anchor 38.

  Moreover, the cylindrical portion 16 is in the swing initial position, and is cylindrical at the other end portion (the right end portion in FIG. 2) of the window portion 28 along the circumferential direction of the base portion 26 by the urging force of the tension coil spring 56. The cylinder 14 is swung until the portion 16 is interfered. For this reason, the cylindrical portion 16 is seated on the occupant 30 with the distal end of the cylindrical portion 16 along the width direction of the seat 18 with respect to the base end portion. Tilt out of position. For this reason, the webbing support 34 and the webbing belt 42 hardly interfere with the body of the occupant 30 when the occupant 30 is seated on the seat 18. For this reason, the occupant 30 can sit on the seat 18 smoothly.

  In this state, as shown in FIG. 4, the buckle 82 is positioned below the seating surface (upper surface) of the seat cushion 78, such as in the pocket 83, so that the occupant 30 is seated on the seat 18. The buckle 82 is difficult to interfere with the body of the passenger 30. Accordingly, this also allows the occupant 30 to sit on the seat 18 smoothly.

  On the other hand, as shown in FIG. 6, when the occupant 30 is seated on the seat 18, the weight of the occupant 30 acts on the seat cushion 78. Since the cushion material 106 is softer than the cushion material of the seat cushion 78, the cushion material 106 is deflated while the bag body 104 is deflated by the weight of the occupant 30 before the cushion material of the seat cushion 78 is compressed by the weight of the occupant 30. Is compressed.

  Thus, when the bag body 104 is deflated, the air in the bag body 104 is released to the tube 124. As shown in FIG. 5A, the valve body 136 in the housing 128 normally opens the space between the flow path mechanism 122 and the tube 130 and closes the tube 132 side. When the air in the bag body 104 is released, the internal pressure of the tube 130 increases, and further, the internal pressure of the cylinder 14 connected to one other end of the tube 130 increases. When the internal pressure of the cylinder 14 rises, the piston 32 slides toward the distal end side of the cylindrical portion 16, whereby the webbing support 34 moves to the front side of the seat back 22 as shown in FIGS. 7 and 8. To do.

  As a result, the folding position of the webbing belt 42 at the slide anchor 38 moves to the front side of the seat back 22, so that the webbing belt 42 extending downward so as to follow the front surface of the seat back 22 is at least of the slide anchor 38. The front side of the seat back 22 is separated from the front side in the vicinity. As described above, the webbing belt 42 is spaced forward from the front surface of the seat back 22, so that the occupant 30 seated on the seat 18 can easily grip the tongue 48 provided on the webbing belt 42. As a result, the occupant 30 can easily grasp the tongue 48 and pull the tongue 48 to attach the webbing belt 42.

  On the other hand, as described above, when the internal pressure of the tube 130 is increased by releasing the air in the bag body 104 to the tube 124, the internal pressure of the cylinder 86 connected to the other end of the tube 130 is increased. When the internal pressure of the cylinder 86 rises, the piston 88 slides toward the tip end side of the cylinder 86, whereby the rod 90 moves forward and presses the pressed piece 84 from the rear as shown in FIG. . When the pressed piece 84 is pressed from the rear in this way, when the arm 74 rotates around the rotation center of the arm 74 in the base portion 76, the tip of the buckle support piece 80 rotates so as to rise. Thus, the buckle 82 is rotated so as to rise.

  As the buckle 82 is raised in this way, the buckle 82 is positioned above the seating surface (upper surface) of the seat cushion 78, so that the occupant 30 can easily check the buckle 82 and pull it as described above. The tongue 48 can be easily attached to the buckle 82.

  Further, as described above, when the tongue 48 is pulled toward the buckle 82 in order to hang the webbing belt 42 around the body, the webbing belt 42 passing through the anchor hole 40 is moved to the slide anchor 38 and eventually the webbing support 34. Is pulled toward the center in the width direction of the seating position of the occupant 30 in the seat 18. By pulling the webbing support 34 in this way, the cylinder 14 swings to the tension swing position about the central axis of the base portion 26 as shown in FIG. Thereby, since the slide anchor 38 approaches the shoulder part of the occupant 30, the webbing belt 42 can be worn in a state suitable for the body of the occupant 30.

  Further, when the cylinder 14 swings to the pull swing position as described above, the vent hole 50 of the shaft portion 20 and the vent hole 52 of the base portion 26 communicate with each other as shown in FIG. And the outside of the base portion 26 communicate with each other. In this state, the air in the shaft portion 20 can escape to the outside of the base portion 26 through the vent holes 50 and 52, so the internal pressure of the shaft portion 20 cannot resist the urging force of the tension coil spring 56. . Therefore, in this state, the webbing support 34 is pulled into the cylinder 14 by the urging force of the tension coil spring 56. As a result, the slide anchor 38 returns to the upper side of the seat back 22, so that the slide anchor 38 does not interfere with the body (for example, the shoulder) of the occupant 30.

  As described above, in the seat belt device 10, the webbing support 34 and the buckle 82 are moved by the air released from the bag body 104 by the load when the occupant 30 is seated on the seat 18, and the tongue 48 is easily gripped. Then, the tongue 48 can be attached to the buckle 82. In addition, since the motor is not used when the webbing support 34 and the buckle 82 are moved in this way, complicated control is unnecessary.

  Thereby, the cost can be reduced. Further, since the motor is not used in this way, a sensor for detecting that the occupant 30 is seated on the seat 18 is also unnecessary. Therefore, in this sense, complicated control is unnecessary and the cost can be reduced. Further, when the occupant 30 leaves the seat 18 and the weight of the occupant 30 does not act on the bag body 104, the cushion material 106 is restored by its elasticity, and the bag body 104 is expanded again, so that the bag body 104 is restored. No special fluid supply is required for this. For this reason, cost can be further reduced.

  Furthermore, although the bag body 104 is deflated by the load when the occupant 30 is seated on the seat 18, a particularly large tensile load does not act on the bag body 104. Further, the deflated bag body 104 is inflated by the cushion material 106, and in this case as well, a particularly large tensile load does not act on the bag body 104. For this reason, even if it does not give the bag body 104 a particularly high strength, it has sufficient durability, so that good operability can be secured for a long time at a low cost.

  On the other hand, when the vehicle sudden deceleration state detecting means such as an acceleration sensor mounted on the vehicle detects that the vehicle is suddenly decelerated, the ECU activates the ignition device in the inflator 134. When the ignition device is activated and the ignition agent is ignited, the gas generating agent is burned to generate gas. The gas generated in the inflator 134 in this way is sent into the tube 132 and further sent into the housing 128.

  When the gas generated in the inflator 134 is sent into the housing 128, the valve body 136 rotates against the urging force of the valve body urging means by the pressure of this gas. As a result, as shown in FIG. 5B, when the valve body 136 closes between the tube 130 and the tube 124 and opens between the tube 132 and the tube 124, it is generated in the inflator 134. The gas is fed into the bag body 104 to forcibly inflate the bag body 104. Accordingly, as shown in FIG. 12, when the seat surface of the seat cushion 78 rises, the seating posture of the occupant 30 on the seat 18 changes to prevent or prevent the so-called “submarine phenomenon”. The restraint of the body of the occupant 30 by 42 is improved.

  Moreover, unlike the occupant restraint device disclosed in Patent Document 1, the bag body 104 that is inflated by the pressure of the gas generated by the inflator 134 and changes the seating posture of the occupant 30 is not only used during sudden deceleration of the vehicle. It can be effectively used as a gas pressure supply source for moving the webbing support 34 and the buckle 82 at the normal time.

  In the present embodiment, as described above, since the bag body 104 has a strength that can withstand the pressure of the gas supplied from the inflator 134, the load and cushion when the occupant 30 is seated on the seat 18. The strength is sufficiently higher than the strength that can withstand only the load when the material 106 is expanded. Therefore, even in this sense, even if the bag body 104 is not given particularly high strength, the bag body 104 has sufficient durability, so that good operability can be secured for a long time at low cost. In addition, the configuration in which the deflated bag 104 is restored when the occupant 30 is seated on the seat 18 is the cushion material 106 formed of a softer material than the cushion material constituting the seat cushion 78, so the occupant 30 is seated The seating comfort when sitting on 18 is not deteriorated.

  In addition, in this Embodiment, although it is the structure provided with both the shoulder side mounting assistance apparatus 12 and the seat cushion 78, it is good also as a structure which is not provided with the shoulder side mounting assistance apparatus 12 or the seat cushion 78.

  Moreover, although this Embodiment was the structure provided with the inflator 134, it is good also as a structure which is not provided with the inflator 134. FIG.

  Further, in the present embodiment, the assist gas supply device 102 is provided on the lower side of the cushion material of the seat cushion 78, but the assist gas supply device 102 is provided on the rear side of the cushion material of the seat back 22. The shoulder side mounting assist device 12 and the buckle side mounting assist device 72 may be operated by a load when the occupant 30 leans against the seat back 22.

  In the present embodiment, the air discharged from the bag body 104 and the gas discharged from the inflator 134 are an aspect of “fluid” in the claims, but the fluid is such It is not limited to air or gas, and other fluids such as liquid may be used.

<Configuration of Second Embodiment>
Next, a second embodiment of the present invention will be described. In the description of the present embodiment, the same reference numerals are assigned to the same parts as those in the first embodiment, and the detailed description thereof is omitted. Further, since the present embodiment is a modification of the buckle side mounting assist device 72 described above, there is basically no change with respect to the shoulder side mounting assist device 12, the assist gas supply device 102, the flow path mechanism 122, and the like. Detailed description thereof will be omitted.

  FIG. 13 is a side sectional view schematically showing a configuration of a buckle side mounting assist device 162 that constitutes one mode of the mounting assist means as the shoulder side mounting assist means in the seat belt device 160 according to the present embodiment. As shown in this figure, the buckle side mounting assist device 162 includes a bellows tube 164. The bellows cylinder 164 is formed to be extendable in the vertical direction, and the lower end thereof is closed in a state of being fixed to a structural member 166 constituting the vehicle body below the seat cushion 78 of the seat 18. An anchor plate 168 is provided inside the bellows tube 164. The anchor plate 168 is fixed to the structural member 166 described above. Further, one end of the connecting member 170 is locked to the anchor plate 168. The connecting member 170 is formed of a flexible member such as the webbing belt 42 or a wire.

  On the other hand, a buckle 82 is provided on the upper side of the upper end portion of the bellows tube 164, and a fixing plate 172 extending from the side opposite to the side where the tongue 48 of the buckle 82 is inserted penetrates the upper end of the bellows tube 164. Then, it enters the inside of the bellows tube 164. Thus, the other end of the connecting member 170 is locked to the fixed plate 172 that has entered the bellows tube 164. Here, the length of the connecting member 170 is fixed to the locking position of the connecting member 170 at the anchor plate 168 in a state where the bellows tube 164 extends with the upper end portion and the lower end portion being farthest apart. It is set to be equal to or more than the interval with the engagement position of the connecting member 170 on the plate 172.

  Further, a connection portion 174 is formed in the vicinity of the lower end portion of the bellows tube 164, and the other end portion of the tube 130 is connected thereto.

<Operation and Effect of Second Embodiment>
In the present embodiment having the above-described configuration, the bellows tube 164 is contracted before the occupant 30 is seated on the seat 18. In this state, the buckle 82 is in the pocket 83 or the like, and the seat cushion 78. Therefore, the buckle 82 hardly interferes with the body of the occupant 30 when the occupant 30 sits on the seat 18. Accordingly, this also allows the occupant 30 to sit on the seat 18 smoothly.

  On the other hand, when the occupant 30 sits on the seat 18 and the bag body 104 is deflated and the air in the bag body 104 is released to the tube 124, the internal pressure of the tube 130 rises and is connected to the other end of the tube 130. The internal pressure of the bellows tube 164 is increased. When the internal pressure of the bellows tube 164 rises, as shown in FIG. 14, the bellows tube 164 extends so that the upper end of the bellows tube 164 is separated from the lower end portion of the bellows tube 164, whereby the buckle 82 is lifted. To rise.

  As a result, the buckle 82 is positioned above the seating surface (upper surface) of the seat cushion 78, so that the occupant 30 can easily check the buckle 82 and easily attach the tongue 48 pulled as described above to the buckle 82. it can. Thus, also in this embodiment, the same effect as in the first embodiment can be obtained.

DESCRIPTION OF SYMBOLS 10 Seat belt apparatus 14 Cylinder 18 Seat 22 Seat back 26 Base part (support means)
34 Webbing support body 42 Webbing belt 48 Tongue 104 Bag body 106 Cushion material (biasing means)
124 Tube (first connecting means)
126 Three-way valve (valve)
130 Tube (first connecting means)
132 Tube (second connection means)
160 Seat belt device

Claims (5)

A long length provided behind or below the seat back constituting the seat and capable of restraining the occupant's body by being attached to the occupant's body seated on the seat from the side of the seating position of the occupant in the seat A belt webbing belt;
A webbing support provided at an initial position on the side of the seating position and on the upper side of the seat back to support the webbing belt passing through the initial position;
A buckle that is provided at an initial position on the side of the seating position and on which a tongue provided on the webbing belt is worn when the webbing belt is worn on the body of the occupant;
It is deflated by a load from the occupant seated on the seat and is released from the internal fluid, and at least one of the webbing support and the buckle is moved to its initial position by the pressure of the released fluid. A bag body that is moved to a mounting assist position separated in a predetermined direction with respect to
It is provided inside the bag body, is compressed by receiving the load and is restored by elasticity when the load is eliminated, and the bag body that has been deflated by inflating is inflated to supply fluid to the bag body. An elastic body to be inhaled;
A seat belt device comprising:   2. The seat according to claim 1, further comprising a fluid supply unit configured to provide the seat body constituting the seat with the bag body, operate in a vehicle sudden deceleration state, supply fluid to the bag body, and inflate the bag body. Belt device. A tubular first connection means for connecting the bag body and the one that moves with the pressure of the fluid discharged from the bag body of the webbing support body and the buckle, and through which the fluid discharged from the bag body passes;
A tubular second connecting means for connecting the intermediate portion of the first connecting means and the fluid supply means, and through which the fluid from the fluid supply means passes;
Provided at a connection portion between the first connection means and the second connection means, and normally closes the space between the first connection means and the second connection means to open the first connection means, and In the vehicle sudden deceleration state, the connection portion between the first connection means and the second connection means is closed between the webbing support body and the buckle that moves with the pressure of the fluid discharged from the bag body. A valve that opens between the bag and the connecting portion between the first connecting means and the second connecting means,
The seatbelt apparatus of Claim 1 or Claim 2 provided with this.   The valve is biased in a direction to close between the first connection means and the second connection means, moves against the bias by the pressure of the fluid sent from the fluid supply means, and A connecting portion between one connecting means and the second connecting means, and the webbing support body and the buckle which is moved by the pressure of the fluid discharged from the bag body, and the first connecting means; The seat belt device according to claim 3, wherein a gap between a connection portion with the second connection means and the bag body is opened. The webbing support is accommodated so as to be slidable to the tip side and the opposite bottom side, and the internal pressure rises by supplying the fluid from the bottom side. A cylinder in which a webbing support is slid to the tip side, and a ventilation part is formed on the bottom side of the webbing support to communicate inside and outside;
Corresponding to the initial position of the webbing support, the seat back is provided at or near the upper end of the seat back, and the cylinder is placed in the seat with the front end of the cylinder facing the front of the seat rather than the bottom. Is supported so as to be swingable around an axis having an up-and-down direction as an axial direction, and further, the ventilation portion is closed, and the occupant wears the webbing belt through the webbing belt and the webbing support. A support member that opens the ventilation part by pulling the cylinder and swinging the cylinder about an axis whose axial direction is the vertical direction of the seat;
The urging direction of the cylinder when the occupant pulls the cylinder via the webbing belt and the webbing support when the occupant attaches the webbing belt while urging the webbing support to the bottom side of the cylinder Biasing means for biasing the webbing support in the opposite direction;
The seat belt device according to any one of claims 1 to 4, further comprising:

Images