JP2010125965A - Seat belt device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat belt device that improves ease of wearing of a seat belt with a configuration that is compact in the width direction. <P>SOLUTION: The seat belt device 10 comprises a webbing 20 that assumes a storage attitude in which it extends along the front surface 14B of a seat back 14 when not in use, a retractor 22 that drawably winds up the upper end portion of the webbing 20 by power, and a high rigidity portion 32 provided on the lower portion of the webbing 20 in the storage attitude excluding the lower end thereof. When the retractor 22 draws out the webbing 20, the high rigidity portion 32 falls in a forward tilting direction while applying a tension on the upper part of the webbing 20 above the high rigidity portion 32 to form a space between the front surface 14B of the seat back 14 and the webbing 20 that allows an arm of the seat occupant to pass through. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a seat belt device for restraining an occupant seated on a seat.

2. Description of the Related Art A seat belt device is known in which a boot member into which a lower portion of a seat belt is inserted is displaced from a retracted position to a forward use position, thereby facilitating the removal of the belt when the belt is attached (for example, Patent Documents). 1).
JP 2006-256532 A

  However, the conventional technology as described above has a configuration in which the boot member is disposed on the side of the seat finisher, so that it is difficult to apply to a seat that does not have sufficient space on the outer side in the vehicle width direction such as a rear seat.

  In view of the above facts, an object of the present invention is to provide a seat belt device capable of improving seat belt mounting performance with a compact configuration in the vehicle width direction.

  The seatbelt device according to the invention of claim 1 is a seatbelt that extends in the vertical direction of the vehicle and takes a storage posture along the surface of the vehicle seat or the interior material of the vehicle when not attached to the occupant, A retractor capable of retracting and retracting the upper end side in the seat belt retracted position and pulling out the seat belt by power, and the lower part of the seat belt provided in a lower portion except the lower end part in the seat belt retracted position. A high-rigidity portion that is higher in rigidity than a portion, and the high-rigidity portion of the seatbelt in the seatbelt is pulled out from the retractor when the seatbelt is in the stowed state. The upper end side of the high-rigidity part is separated from the surface of the vehicle seat or the interior of the vehicle interior while applying tension to the portion located on the upper side of the vehicle By falling the direction, and a, a mounting auxiliary means for separating the intermediate portion of the seat belt from the surface or cabin interior material of the vehicle seat.

  In the seatbelt device according to the first aspect, when the seatbelt is not attached, the seatbelt is in the stowed posture extending in the vehicle vertical direction along the surface of the vehicle seat or the interior material of the passenger compartment. From this state, when the upper end side of the seat belt is pulled out from the retractor, the high-rigidity portion applies tension to the seatbelt located above the high-rigidity portion, and the upper end is the surface of the vehicle seat or the vehicle interior. It falls in the direction away from the equipment. As a result, the seat belt is located on the vehicle seat surface or the vehicle interior on both the upper and lower sides of the upper end of the high-rigidity portion so as to be farthest from the surface of the vehicle seat or the vehicle interior material in the vicinity of the upper end of the high-rigidity portion. It is set as the attitude | position in which a clearance gap is formed between the materials. The vehicle seat occupant can easily put on the seat belt by passing the arm through the gap.

  Here, the high-rigidity portion provided on the seat belt itself is tilted with the pull-out operation of the seat belt, so that the seat belt is separated from the surface of the vehicle seat or the interior material of the vehicle interior, and a gap is formed between them. Therefore, it is possible to improve the seat belt mounting ability without relying on the portion protruding in the vehicle width direction. In addition, since the high-rigidity portion is provided in a lower portion excluding the lower end portion in the seat belt storage posture, the lower end of the seat belt in the storage posture is not restrained, and the surface of the vehicle seat or the vehicle interior The storage posture follows the equipment and the appearance is good.

  Thus, in the seatbelt device according to the first aspect, the seatbelt can be mounted with a compact configuration in the vehicle width direction.

  According to a second aspect of the present invention, there is provided a seat belt device that extends in the vertical direction of the vehicle and takes a stowed posture along a front-facing surface of the seat back when not attached to an occupant, and the seat belt. A retractor capable of retracting the upper end side in a retracted posture of the seat and retracting the seat belt by power, and a lower portion in the retracted posture of the seat belt. A high-rigidity portion having higher rigidity than other portions of the seatbelt, and at least the high-rigidity portion is moved forward of the vehicle as the seatbelt is pulled out of the retractor from a state where the seatbelt is in the retracted position. A wearing auxiliary hand that causes the intermediate portion of the seat belt to separate from the front surface of the vehicle seat back by falling down It has a, and.

  In the seatbelt device according to the second aspect, when the seatbelt is not mounted, the seatbelt is in a stowed posture extending in the vehicle vertical direction along the front surface of the seatback. The high-rigidity portion whose lower end is located on the seat cushion has a storage posture that follows the front surface of the seat back because the lower end portion is not restrained by the vehicle seat, and has a good appearance.

  When the upper end side of the seat belt is pulled out from the retracted state, the high-rigidity portion whose lower end is positioned on the seat cushion tilts forward (falls forward) while maintaining its shape. Then, the portion of the seat belt that is located above the highly rigid portion is spaced forward from the front surface of the seat back between the shoulder portion of the seat back and the upper end of the highly rigid portion. That is, a gap is formed between the seat belt and the front surface of the seat back on both upper and lower sides with respect to the upper end of the high-rigidity portion. The vehicle seat occupant can easily put on the seat belt by passing the arm through the gap.

  Here, the high-rigidity portion provided on the seat belt itself is tilted with the pull-out operation of the seat belt, so that the seat belt is separated from the surface of the vehicle seat or the interior material of the vehicle interior, and a gap is formed between them. Therefore, it is possible to improve the seat belt mounting ability without relying on the portion protruding in the vehicle width direction.

  Thus, in the seatbelt device according to the second aspect, the seatbelt can be mounted with a compact configuration in the vehicle width direction, and the seatbelt can be improved.

  According to a third aspect of the present invention, there is provided the seat belt device according to the first or second aspect, wherein the high-rigidity portion is provided in an intermediate portion of the seat belt, and the seat belt is mounted. It also serves as a position restricting portion that restricts the position of the connecting member connected to the connected portion in the longitudinal direction of the seat belt.

  In the seatbelt device according to the third aspect, since the high-rigidity portion also serves as the position restricting portion of the connecting member, the number of parts can be reduced. In addition, if the connecting member is configured to restrict the position of the connecting member at the upper end of the high-rigidity part, the connecting member is connected to the position farthest from the vehicle seat (the front of the seat back) or the interior member when the high-rigidity part is tilted. The member can be positioned, and the seat belt mounting property can be further improved.

  According to a fourth aspect of the present invention, there is provided the seat belt apparatus according to any one of the first to third aspects, wherein the high-rigidity portion is opposite to a contact side of the seat belt with an occupant. Is provided with a stiffening portion.

  In the seatbelt device according to the fourth aspect, the high rigidity portion is configured by providing the stiffening portion on the opposite side of the thickness direction from the surface of the seatbelt on the contact side with the occupant. Thereby, the stiffening part which performs the said function can be provided so that a passenger | crew may not be uncomfortable.

  The seatbelt device according to a fifth aspect of the present invention is the seatbelt device according to any one of the first to third aspects, wherein the high-rigidity portion is stiffened to a part in the width direction of the seatbelt. It is comprised by providing a part.

  In the seat belt device according to the fifth aspect, the high rigidity portion is configured by providing the stiffening portion in a part of the width direction of the seat belt. As a result, the high-rigidity portion is ensured in flexibility as compared with the configuration in which the stiffening portion is provided in the entire belt width direction, and the followability to the occupant during mounting is ensured.

  A seat belt device according to a sixth aspect of the present invention is the seat belt device according to any one of the first to fifth aspects, wherein the attachment assisting means is configured so that the seat belt is in the stowed posture. As the seat belt is pulled out from the retractor, the belt drive mechanism further moves the intermediate portion of the seat belt to the falling side of the high-rigidity portion.

  In the seat belt device according to the sixth aspect, as the retractor pulls out the seat belt, the belt driving mechanism further moves the intermediate portion of the seat belt to the falling side of the high-rigidity portion. Thereby, the clearance gap between a seatbelt and a vehicle seat (front surface of a seatback) or a vehicle interior material is further increased, and seatbelt mounting properties can be further improved.

  For example, if the belt drive mechanism is arranged inside the vehicle interior material, the seat belt mounting property can be further improved as described above in a compact configuration in the vehicle width direction. Further, if the belt drive mechanism is configured to move the connecting member such as the tongue plate to the falling side of the high-rigidity portion, the seated occupant can easily hold the connecting member, and the seat belt can be more easily mounted. it can. Furthermore, if the retractor pulls out the seat belt in synchronism with the operation of the belt drive mechanism, the required power of the belt drive mechanism is small, and the belt drive mechanism can be made compact.

  As described above, the seat belt device according to the present invention has an excellent effect that the seat belt device can be improved in the seat width direction with a compact configuration in the vehicle width direction.

  A seat belt device 10 according to an embodiment of the present invention will be described with reference to FIGS. It should be noted that arrow FR, arrow UP, arrow IN, and arrow OUT that are appropriately described in each figure are vehicle widths that substantially match the front (running) direction, the upward direction, and the seat width direction of the vehicle A to which the seat belt device 10 is applied. The inside and the outside of the direction are shown.

  FIG. 2 is a perspective view showing a rear seat 11 as a vehicle seat to which the seat belt device 10 is applied. As shown in this figure, the rear seat 11 is configured such that a seat back 14 for supporting the upper body of a seated occupant of the seat cushion 12 from the back side is provided at the rear end of the seat cushion 12 as a seat portion. . In this embodiment, the rear seat 11 is configured as a seat on the outer side in the vehicle width direction in a three-seater rear seat where three passengers can sit side by side in the vehicle width direction. A rear side door 18 that opens and closes a door opening 16 for a seated passenger of the rear seat 11 to get on and off is located outside the rear seat 11 in the vehicle width direction.

  The seat belt device 10 includes an occupant restraining webbing 20 as a seat belt. As shown in FIG. 1, the end on the upper end side of the occupant restraining webbing 20 is wound around the retractor 22 so that it can be pulled out. The retractor 22 is fixed to the vehicle body behind the seat back 14. The retractor 22 may be disposed in the seat back 14 or the like.

  And the retractor 22 which comprises the seatbelt apparatus 10 is used as the motor retractor (PSB) which can drive the spool which winds up the webbing 20 with the motive power of a motor. Therefore, the retractor 22 can both take up and draw out (feed out) the webbing 20 by the power of the motor. In this embodiment, the retractor 22 is configured to be able to adjust the pull-out amount of the webbing 20 (can be pulled out by a predetermined amount).

  On the other hand, the lower end of the webbing 20 is fixed to the rear seat 11 (vehicle body) by an anchor 24. In this embodiment, the lower end portion 20 </ b> A of the webbing 20 is fixed between the seat cushion 12 and the seat back 14 and fixed to the anchor 24.

  An intermediate portion of the webbing 20 is inserted through a webbing guide 26 provided on the shoulder 14A on the outer side in the vehicle width direction of the seat back 14. In the seat belt device 10, the retractor 22 and the anchor 24 are respectively disposed on the outer portions in the vehicle width direction of the rear seat 11, so that the intermediate portion (exposed portion) 20 </ b> B of the webbing 20 in the non-mounted state is as shown in FIG. 2. It arrange | positions along the front surface 14B in the vehicle width direction outer side of the seat back 14. FIG. That is, the intermediate portion 20B of the webbing 20 in the non-mounted state has a configuration in which one surface in the thickness direction is in contact with (or in close proximity to) the front surface 14B of the seat back 14 and has a storage posture extending in the vehicle vertical direction. (See also the dashed line in FIG. 1).

  Further, a tongue plate 28 as a connecting member is provided in the intermediate portion 20B of the webbing 20. The tongue plate 28 is slidable in the longitudinal direction of the webbing 20 by inserting the webbing 20 through the insertion hole 28A (see FIG. 2). The tongue plate 28 can be engaged with and disengaged from a buckle 30 (see FIG. 2) as a connected portion provided on the inner end side in the vehicle width direction between the seat cushion 12 and the seat back 14 of the rear seat 11. .

  In the seat belt device 10, the shoulder webbing (not shown) from the webbing guide 26 to the buckle 30 (the tongue plate 28) restrains the upper body of the seated occupant of the rear seat 11 while the tongue plate 28 is locked to the buckle 30. A lap webbing (not shown) from the buckle 30 to the seat back 14 restrains the main part of the seated occupant of the rear seat 11. Therefore, the seat belt device 10 in this embodiment is a so-called three-point seat belt device.

  As shown in FIGS. 1 and 2, the seatbelt device 10 includes a high-rigidity portion 32 provided at a lower portion of the intermediate portion 20 </ b> B of the webbing 20 in a non-mounted state. The high-rigidity portion 32 is configured such that the webbing 20 in the installation range is more rigid with respect to bending than the other portions. The high-rigidity portion 32 is provided so that the lower end 32 </ b> A is positioned on the seat cushion 12. In other words, the high-rigidity part 32 is provided in the lower part except the lower end part 20C in the intermediate part 20B of the webbing 20 in the non-mounted state. Thereby, the highly rigid part 32 is set as the structure which does not inhibit the bending of the webbing 20 under the lower end 32A. On the other hand, the upper end 32B of the high-rigidity portion 32 functions as a stopper that restricts the downward movement of the tongue plate 28 as will be described later.

  As shown in FIG. 3, the high-rigidity portion 32 is configured by providing a stiffening member 34 at one end of the webbing 20 in the webbing width direction so as to sandwich the webbing 20 in the thickness direction. The stiffening member 34 is made of, for example, hard rubber or the like, and as shown in FIG. 4C, the tip 35A of the caulking member 35 penetrating the pair of opposing walls 34A sandwiching the webbing 20 is thermally caulked. 4 (A) and 4 (B), the webbing 20 is fixedly provided.

  As shown in FIG. 2, the stiffening member 34 is provided so as to be positioned on the outer side in the vehicle width direction of the webbing 20 taking the storage posture. The high-rigidity portion 32 configured by providing the stiffening member 34 is thicker than other portions, so that the tongue plate 28 is prevented from entering the insertion hole 28A. Therefore, the upper end 32B of the high-rigidity portion 32 is configured to function as a tongue stopper that restricts the downward movement of the tongue plate 28 as described above.

  The high-rigidity portion 32 described above is configured such that when the intermediate portion 20B of the webbing 20 in the non-wearing state is slackened, as shown by a solid line in FIG. The slack of the high-rigidity portion 32 eliminates the slack of the webbing 20 within a predetermined range (tension is applied to the webbing 20 above the high-rigidity portion 32). The posture of the webbing 20 in a state where the high-rigidity portion 32 is tilted forward by a predetermined amount as shown by a solid line in FIG.

  The seat belt device 10 includes a belt drive mechanism 36 that further moves the intermediate portion 20B of the webbing 20 in the mounting assistance preparation posture forward. As shown in FIG. 1, the belt driving mechanism 36 engages a pin 38 from the rear side with the tongue plate 28 of the webbing 20 taking the mounting assistance preparation posture, and moves the pin 38 forward of the vehicle, thereby causing the webbing 20 to move forward. Is changed to a mounting assistance posture indicated by an imaginary line in FIG. In this embodiment, the pin 38 is disposed on the armrest portion 40 </ b> A in the door trim 40 as an interior member constituting the rear side door 18. This will be specifically described below.

  As shown in FIG. 5 (A), the belt drive mechanism 36 is projected into the vehicle interior by a pin advance / retreat mechanism 36A that drives the pin 38 in the vehicle width direction to advance and retract from the armrest portion 40A through the slit 40B. The pin advancing mechanism 36B that drives the pin 38 from the rear side movement limit to the front side movement limit is configured as a main part.

  The pin advancing / retracting mechanism 36A includes a feed screw mechanism 42 including a screw 42A and a nut 42B, and a motor 46 in which a drive gear 44 that meshes with an external gear formed on the outer periphery of the nut 42B is fixed to a rotary shaft 46A. It is configured as. When the motor 46 is rotated forward from the retracted position where the pin 38 is located in the door trim 40, the pin advancing / retracting mechanism 36A causes the screw 42A serving also as the pin 38 to enter (project) a predetermined amount from the door trim 40 into the vehicle interior. When the motor 46 is reversely rotated from the state where the pin 38 enters the vehicle interior by a predetermined amount, the screw 42A, that is, the pin 38 is retracted into the door trim 40.

  As shown in FIG. 5B, in the pin advance mechanism 36B, an endless timing belt 48 wound around a pair of front and rear pulleys 47 and a timing pulley 50 meshed with the timing belt 48 are fixed to a rotating shaft 52A. The motor 52 and the transported body 54 attached to the timing belt 48 are configured as main parts. The transported body 54 rotatably supports the screw 42A, that is, the pin 38, and supports the motor 46 in a fixed manner. When the motor 52 is rotated forward from the state where the pin 38 is located at the rearward movement limit (the rear end of the slit 40B), the pin advancing mechanism 36B advances the pin 38 supported by the transported body 54 to the frontward movement limit. When the motor 52 is reversed from the state where the pin 38 is located at the front movement limit (front end of the slit 40B), the pin 38 supported by the transported body 54 is retracted to the rear movement limit. Yes.

  The operation of the belt drive mechanism 36 in this embodiment is controlled by the ECU 56 as a control device together with the retractor 22. The belt drive mechanism 36 has an initial position where the pin 38 is in the retracted position and in the rearward movement limit. When an ON signal corresponding to the seating of an occupant on the rear seat 11 is input from the seating sensor 58, the ECU 56 sets a predetermined amount from the retracted posture of the webbing 20 to the retractor 22 (the amount by which the webbing 20 is set as a mounting assistance preparation posture). After the webbing 20 is pulled out only, the pin 38 is driven from the retracted position to the entry position at the rear side movement limit, and the pin 38 while maintaining the entry position is driven between the front side movement limits.

  As a result, in the seat belt device 10, the webbing 20 in the mounting assist preparation posture is shifted to the mounting assist posture shown by an imaginary line in FIG. This mounting assisting posture is separated from the high-rigidity portion 32 (stopper) while the high-rigidity portion 32 is further tilted forward and the tongue plate 28 is supported by the pin 38 that is located at the front side of the mounting assisting preparation posture. The webbing 20 is stretched between the tongue plate 28 and the webbing guide 26 (tension is applied). In other words, in the mounting assistance posture, the gap between the front surface 14B of the seat back 14 and the webbing 20 is larger than the mounting assistance preparation posture, and the tongue plate 28 is disposed at a substantially higher position and in front. It is considered to be a posture.

  Further, the ECU 56 drives the pin 38 from the approach position to the retracted position at the front side movement limit when an ON signal corresponding to the connection of the tongue plate 28 and the buckle 30 is input from the buckle switch 60. The pin 38 with the retracted position maintained is driven between the rearward movement limits. Note that this order of operation may be reversed.

  In the seat belt device 10 described above, the high-rigidity portion 32, the belt drive mechanism 36, and the ECU 56 correspond to the mounting assisting means in the present invention.

  Next, the effect | action of this embodiment is demonstrated, referring the flowchart of FIG. 6 which shows the example of control by ECU56.

  In the seat belt device 10 having the above-described configuration, when the passenger is not seated on the rear seat 11, the webbing 20 extends along the front surface 14B of the outer portion in the vehicle width direction of the seat back 14, as shown by the one-dot chain line in FIGS. The storage posture is taken. When an occupant is seated on the rear seat 11 from this state, an ON signal is output from the seating sensor 58 to the ECU 56. When the ECU 56 determines that the ON signal has been input in step S10 shown in FIG. 6, the ECU 56 proceeds to step S12 and controls the retractor 22 (or its motor) so that the webbing 20 is pulled out from the retractor 22 by a predetermined amount.

  Then, the webbing 20 falls in the forward tilt direction using its own weight (and the weight of the tongue plate 28) while maintaining the shape of the high rigidity portion 32 substantially. The intermediate portion 20B of the webbing 20 extended by being pulled out from the retractor 22 is stretched between the high-rigidity portion 32 and the webbing guide 26 (tension is applied), and the mounting aid shown by the solid line in FIG. It leads to a preparation posture.

  If the ECU 56 determines in step S14 that the amount of the webbing 20 pulled out from the retractor 22 has reached a predetermined amount, that is, the webbing 20 has reached the mounting assistance preparation posture, the ECU 56 proceeds to step S16. In step S16, the ECU 56 controls the pin advance / retreat mechanism 36A of the belt drive mechanism 36 so that the pin 38 reaches the entry position from the retracted position. Next, the ECU 56 proceeds to step S18, and controls the pin advance mechanism 36B of the belt drive mechanism 36 so that the pin 38 extends from the rear movement limit to the front movement limit.

  As a result, the pin 38 is engaged with the tongue plate 28 of the webbing 20 taking the mounting assistance preparation posture from the back side, and the pin 38 moves to the front side movement limit while maintaining the engaged state. This leads to a wearing assistance posture indicated by an imaginary line in FIG. In step S <b> 18, the ECU 56 pulls out the webbing 20 from the retractor 22 with the power of the motor in synchronization with the operation of the pin advance mechanism 36 </ b> B of the belt drive mechanism 36 moving the pin 38 forward. Thereby, the pin advancing mechanism 36B can shift the webbing 20 from the mounting assist preparation posture to the mounting assist posture with low power.

  The seated occupant of the rear seat 11 grips the tongue plate 28 of the webbing 20 in the mounting assisting posture, and attaches the webbing 20 by connecting the tongue plate 28 to the buckle 30. Then, an ON signal is output from the buckle switch 60 to the ECU 56. The ECU 56, which has determined that the ON signal is input from the buckle switch 60 in step S20, proceeds to step S22, and controls the pin advance / retreat mechanism 36A of the belt drive mechanism 36 so that the pin 38 reaches the retracted position from the entry position. Next, the ECU 56 proceeds to step S24, and controls the pin advance mechanism 36B of the belt drive mechanism 36 so that the pin 38 extends from the front side movement limit to the rear side movement limit. Thereby, in the seat belt device 10, when the seated occupant of the rear seat 11 wears the webbing 20, the pin 38 is returned to the initial position, and the control of the ECU 56 is finished.

  Here, in the seat belt device 10, since the high rigidity portion 32 is provided below the intermediate portion 20 </ b> B of the webbing 20 in the non-mounted state, the high rigidity portion 32 is tilted forward by pulling out the webbing 20 from the retractor 22. The webbing 20 falls to the mounting assistance preparation position. In this mounting assistance preparation posture, a large gap is formed between the front surface 14B of the seat back 14 and the webbing 20, so that a seated occupant of the rear seat 11 can easily wear the webbing 20 through the arm through the gap. . That is, in the seat belt device 10, even when the belt driving mechanism 36 is not provided, the webbing 20 can be easily mounted.

  Furthermore, since the tongue plate 28 is located at the position farthest from the front surface 14B of the seat back 14, the seated occupant of the rear seat 11 can easily grip the tongue plate 28, and the mounting property of the webbing 20 is also improved from this viewpoint.

  As described above, in the seat belt device 10, the high rigidity portion 32 is provided in the lower portion of the intermediate portion 20 </ b> B of the webbing 20 itself that can be pulled out by power by the retractor 22, thereby having a compact configuration in the vehicle width direction. Wearability can be improved.

  In addition, in the seat belt device 10, the belt driving mechanism 36 shifts the webbing 20 that assumes the mounting assisting preparation posture to the mounting assisting posture, so that the gap for allowing the occupant to pass the arm is further expanded in the front-rear direction. Further, the tongue plate 28 is further moved forward, so that the seated occupant of the rear seat 11 can more easily grip the tongue plate 28. As a result, the seat belt device 10 further improves the wearability of the webbing 20.

  Since this belt drive mechanism 36 is built in the door trim 40 of the rear side door 18, it does not occupy a space in the vehicle width direction around the rear seat 11. For this reason, in the seat belt device 10, in the configuration provided with the belt driving mechanism 36, the seat belt can be mounted with a compact configuration in the vehicle width direction, so that the seat belt can be mounted.

  Here, in the seat belt device 10, since the lower end 32A of the high-rigidity portion 32 is positioned on the seat back 14, in other words, the lower end portion 20C of the intermediate portion 20B of the webbing 20 is a bendable general portion (high-rigidity portion). Therefore, the general portion below the high-rigidity portion 32 appropriately follows the surface of the seatback 14 and bends in the storage posture. For example, in the configuration in which the high-rigidity portion 32 extends to the anchor 24, there is a concern that the high-rigidity portion 32 cannot follow the shape of the lower end corner portion of the seatback 14 and is separated from the front surface 14B of the seatback 14. In contrast, in the seat belt device 10, the general portion of the webbing 20 is bent below the high-rigidity portion 32 as described above, so that the high-rigidity portion 32 is disposed along the front surface 14 </ b> B of the seatback 14. For this reason, the seat belt device 10 has a good appearance in a state where the webbing 20 is in the retracted posture as shown in FIG.

  Further, in the seatbelt device 10, the high-rigidity portion 32 (the stiffening member 34) also serves as a stopper that restricts the downward movement of the tongue plate 28, so that the number of parts can be reduced. Further, in the seat belt device 10, the stiffening member 34 is provided on a part of the webbing 20 in the width direction, so that the high rigidity portion 32 is configured. For this reason, the high-rigidity portion 32 is ensured in flexibility in the bending direction as compared with the configuration in which the stiffening member 34 is provided over the entire width of the webbing 20. Followability is ensured.

  In the above-described embodiment, an example in which the high-rigidity portion 32 is configured by providing the stiffening member 34 on the webbing 20 has been described. However, the present invention is not limited to this, and for example, FIG. As shown in FIG. 7B, the high-rigidity portion 32 may be configured by partially double-sewing the webbing 20. Specifically, a webbing 62 having rigidity equal to or higher than that of the webbing 20 is overlapped over the entire width on the surface of the webbing 20 opposite to the seating occupant of the rear seat 11 in the thickness direction. The webbing 20 is fixed by sewing S. In the modification of FIG. 7, a tongue stopper 64, which is a separate member from the double-sewn webbing 62, is provided.

  Even with the configuration including the high-rigidity portion 32 according to this modified example, the embodiment basically includes the above-described embodiment except for the operational effect obtained by providing the stiffening member 34 in a part of the webbing 20 in the width direction. The same effect can be obtained by the same operation as the configuration. Further, in this modification, since the webbing 62 is provided on the opposite side of the webbing 20 from the contact side with the seated occupant of the rear seat 11, a high-rigidity portion that performs the above functions is provided without causing the occupant to feel uncomfortable. can do.

  In the embodiment and the modification described above, the example in which the seat belt device 10 is applied to the rear seat 11 with three persons is shown. However, the present invention is not limited to this, and for example, the present invention is limited to this. For example, the present invention may be applied to a front row seat, a two-seat rear seat, a second row, a third row seat, etc. in which two independent vehicle seats are arranged in the vehicle width direction. good.

  In the above-described embodiment and modification, the webbing 20 taking the storage posture is shown along the front surface 14B of the seat back 14, but the present invention is not limited to this. For example, the webbing 20 is a pillar garnish or the like. It is good also as a structure accommodated along the side surface of an interior member or the seat back 14. FIG.

  Furthermore, in the above-described embodiment, an example in which the seat belt device 10 includes the belt driving mechanism 36 has been described. However, the present invention is not limited to this, and for example, a configuration without the belt driving mechanism 36 may be employed. In this case, the above-described mounting assist preparation position value may be regarded as the mounting assist position.

  Furthermore, in the above-described embodiment and modification, the belt drive mechanism 36 includes a pin advance / retreat mechanism 36A having the feed screw mechanism 42 as a linear motion mechanism and a pin advance mechanism 36B having a timing belt 48 as a linear motion mechanism. Although shown, the present invention is not limited to this. For example, instead of at least one of the pin advance / retreat mechanisms 36A and 36B, the belt drive mechanism 36 is configured using another linear motion mechanism such as a rack and pinion or a linear motor. You may do it.

  In the above-described embodiment and modification, the example in which the webbing 20 is pulled out from the retractor 22 in synchronization with the forward movement of the pin 38 by the pin forward mechanism 36B has been shown. However, the present invention is not limited to this, and for example, the retractor The belt driving mechanism 36 may be configured to drive from the mounting assistance preparation position to the mounting assistance position while pulling out the webbing 20 against the winding force of the webbing 20 by the belt 22.

  Furthermore, in the above-described embodiments and modifications, an example in which the webbing 20 is provided as a seat belt has been described. However, the present invention is not limited to this, and for example, inflated and deployed by receiving a gas supply in the event of a vehicle collision. A configuration may be adopted in which a seat belt including an inflatable portion (air belt) is applied.

  Furthermore, in the above-described embodiment, the example in which the ECU 56 operates the retractor 22 and the belt drive mechanism 36 based on the output signal of the seating sensor 58 has been described. However, the present invention is not limited to this, for example, a courtesy switch or the like The retractor 22 and the belt drive mechanism 36 may be operated by a closing signal of the rear side door 18 from (or a combination of the closing signal and another signal).

1 is a side view showing a schematic configuration of a seat belt device according to an embodiment of the present invention. 1 is a perspective view showing a rear seat to which a seat belt device according to an embodiment of the present invention is applied. It is a perspective view which expands and shows the highly rigid part which comprises the seatbelt apparatus which concerns on embodiment of this invention. It is a figure which shows the highly rigid part which comprises the seatbelt apparatus which concerns on embodiment of this invention, Comprising: (A) is a front view, (B) is a perspective view which expands partially, (C) is an assembly | attachment process. It is sectional drawing. It is a figure which shows the belt drive mechanism which comprises the seatbelt apparatus which concerns on embodiment of this invention, Comprising: (A) is a top view, (B) is a side view. It is a flowchart which shows the control flow by ECU which comprises the seatbelt apparatus which concerns on embodiment of this invention. It is a figure which shows the modification of the highly rigid part which comprises the seatbelt apparatus which concerns on embodiment of this invention, Comprising: (A) is a front view, (B) is a side view.

Explanation of symbols

10 Seat belt device 11 Rear seat (vehicle seat)
14 Seat back 20 Webbing (seat belt)
22 retractor 28 tongue plate (connecting member)
30 buckle (connected part)
32 High-rigidity part (mounting aid)
34 Stiffening member 36 Belt drive mechanism (mounting assisting means)
56 ECU (mounting assistance means)
62 Webbing (stiffening member)

Claims (6)

A seat belt that extends in the vertical direction of the vehicle and takes a storage posture along the surface of the vehicle seat or the interior of the vehicle interior when not attached to the occupant;
A retractor capable of retracting the upper end side in the seating posture of the seat belt so that it can be pulled out and pulling out the seat belt by power; and
The seat belt has a high-rigidity portion that is provided at a lower portion except for a lower end portion in the stowed posture of the seat belt and has higher rigidity than other portions of the seat belt, and the seat belt is moved from the state in which the seat belt assumes the stowed posture. Along with pulling out from the retractor, the high-rigidity portion applies tension to a portion of the seat belt positioned above the high-rigidity portion, and the upper-end side of the high-rigidity portion is placed on the surface of the vehicle seat or the vehicle interior. An attachment assisting means for separating an intermediate portion of the seat belt from a surface of the vehicle seat or a vehicle interior material by falling in a direction away from the equipment;
A seat belt device comprising: A seat belt that extends in the vertical direction of the vehicle and takes a storage posture along the front-facing surface of the seat back when not mounted on the occupant;
A retractor capable of retracting the upper end side in the seating posture of the seat belt so that it can be pulled out and pulling out the seat belt by power; and
The seat belt is provided at a lower portion of the seating posture of the seat belt and includes a high-rigidity portion whose lower end portion is positioned on the seat cushion and has higher rigidity than other portions of the seat belt, and the seat belt takes the seating posture. Attaching auxiliary means for separating the middle portion of the seat belt from the front surface of the vehicle seat back by causing at least the high-rigidity portion to fall forward of the vehicle as the seat belt is pulled out of the retractor from a state;
A seat belt device comprising:   The high-rigidity portion is provided in an intermediate portion of the seat belt, and also serves as a position restricting portion that restricts the position of the connecting member connected to the connected portion when the seat belt is attached to the seat belt in the longitudinal direction. The seat belt device according to claim 1 or 2.   The seat belt device according to any one of claims 1 to 3, wherein the high-rigidity portion is configured by providing a stiffening portion on a side opposite to a contact side with an occupant in the seat belt.   The seat belt device according to any one of claims 1 to 3, wherein the high-rigidity part is configured by providing a stiffening part in a part of the seat belt in a width direction.   The attachment assisting means is a belt drive mechanism for moving an intermediate portion of the seat belt to a fall side of the high-rigidity portion as the seat belt is pulled out from the retractor in a state where the seat belt is in the retracted position. The seat belt device according to any one of claims 1 to 5, further comprising:

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