JP2007045189A - Seat belt wearing auxiliary device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat belt wearing auxiliary device which enhances certainty of wearing auxiliary action when wearing a seat belt. <P>SOLUTION: The seat belt wearing auxiliary device 20 is provided with a clamping/gripping part 24 provided on a wearing auxiliary arm 21 driven by a drive motor 23. The clamping/gripping part 24 is driven by a linear actuator 25 and clamps/grips a webbing 6 from both sides in a thickness direction of the webbing 6. The seat belt wearing auxiliary device 20 is provided with a control device 26 for controlling the drive motor 23 such that the clamping/gripping part 24 moves the wearing auxiliary arm 21 between an auxiliary position becoming a front side than a seat back 4 and a storage position becoming a rear side than the auxiliary position and controlling the linear actuator 25 such that the webbing 6 is clamped/gripped by the clamping/gripping part 24. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a seat belt wearing assistance device for assisting a passenger seated in a vehicle seat when wearing a seat belt.

  In general, when a seat belt is mounted, an occupant seated in a vehicle seat twists the upper body and reaches to the vicinity of a through anchor fixed to a pillar at the rear of the vehicle seat and is hung on the through anchor. The webbing is gripped and pulled out. Therefore, it is necessary to twist the upper body or turn the hand backward, and it is difficult to say that the operation of attaching the seat belt is easy. In view of this, there has been proposed a seat belt wearing assistance device that moves the webbing forward when the seat belt is worn to make it easier to pick up.

  For example, a seat belt wearing assistance device disclosed in Patent Document 1 includes an arm pivotally supported by a pillar at the rear of a vehicle seat and a hook pivotally mounted at the distal end of the arm. ing. In the retracted state, the arm extends downward from the proximal end of the arm along the pillar, and the hook is inserted between the webbings turned back by the anchors toward the rear. When the occupant sits on the vehicle seat, the hook turns 90 ° forward while hooking a part of the webbing. Further, when the arm is swung forward, the webbing is pulled forward and moved to a position where it can be easily taken by the passenger.

In addition, the seat belt wearing assistance device disclosed in Patent Document 2 includes a providing body (for example, an armrest) disposed on the side of a vehicle seat back. The base end of this providing body is fixed so as to be rotatable with respect to the vehicle seat. In the stored state, the provider is rotated to the rearmost side within the rotation range. When the occupant sits on the vehicle seat, the provider is rotated toward the front side. At this time, a part of the webbing comes into contact with the tip of the provider, and the webbing is pulled out by the rotating provider and moved to the front side. Thus, the webbing is moved to a position where the passenger can easily take the webbing.
Japanese Patent No. 3295160 Japanese translation of PCT publication No. 2002-527283

  However, in the seat belt wearing assistance device of Patent Document 1, if some external force acts on the webbing during operation of the auxiliary device, the webbing may come off the hook. Similarly, in the seat belt wearing assist device of Patent Document 2, if some external force acts on the webbing during the operation of the assist device, the webbing may come off from the tip of the provider. In such a case, the attachment assisting operation for moving the webbing forward is missed. That is, the seat belt wearing assistance devices of Patent Documents 1 and 2 have a problem that the certainty of the wearing assistance operation at the time of wearing the seat belt is lacking.

  In order to solve this problem, it is conceivable that the tip of the hook is formed in a hook shape, or a guide portion such as a U-shape is provided at the tip of the providing body. However, it is difficult to say that this is a preferable solution because foreign matters other than webbing are easily caught on the tip of the hook or the tip of the providing body.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a seat belt wearing assistance device capable of improving the certainty of the wearing assistance operation when the seat belt is worn.

  In order to solve the above-mentioned problem, the invention according to claim 1 is to pull out a webbing provided on a seat belt attached to an occupant seated on a vehicle seat having a seat back and to bring the webbing to the front side of the vehicle seat. A seat belt wearing auxiliary device for movement, which is provided on an arm driven by a first drive unit and is driven by a second drive unit to clamp the webbing from both sides in the thickness direction of the webbing And the first drive unit is controlled to move the arm between an auxiliary position where the gripping part is forward of the seatback and a storage position which is rearward of the auxiliary position, And a control unit that controls the second driving unit so that the webbing is pinched by the gripping unit.

  According to a second aspect of the present invention, in the seatbelt wearing assist device according to the first aspect, the second driving unit is configured to perform the gripping unit when the arm moves from the auxiliary position to the retracted position. Release the pinching of the webbing.

  According to a third aspect of the present invention, in the seatbelt wearing assist device according to the first or second aspect, the second driving unit is driven by the driving force of the first driving unit to cause the gripping unit to move. It is an interlocking mechanism that drives.

  According to a fourth aspect of the present invention, in the seatbelt wearing auxiliary device according to any one of the first to third aspects, the control unit is configured such that when the arm is disposed at the retracted position. The gripping unit allows the webbing to be moved by the occupant by driving the second drive unit, and the webbing winding by the winding mechanism for winding the webbing is prohibited. Hold the webbing.

  According to a fifth aspect of the present invention, in the seat belt wearing assistance device according to the fourth aspect, the control unit determines that the vehicle collides based on a detection result of a collision prediction unit for predicting a collision of the vehicle. In this case, the second drive unit is driven so as to release the gripping of the seat belt by the gripping unit, and the winding mechanism is controlled so as to wind up the webbing.

  According to a sixth aspect of the present invention, in the seat belt wearing assistance device according to any one of the first to fifth aspects, the control unit detects whether or not the occupant is seated on the vehicle seat. When it is determined that the occupant is not seated on the vehicle seat based on the detection result of the seating detection means, the arm is disposed at the retracted position.

(Function)
According to the first aspect of the present invention, when the occupant seated on the vehicle seat wears the seat belt, the control unit drives the first driving unit to move the arm arranged at the storage position to the auxiliary position. Move. At this time, the arm is moved to the auxiliary position in a state where the gripping portion grips the webbing, whereby the webbing is pulled out along with the movement of the arm and moved to the front side of the vehicle seat. Therefore, the passenger sitting on the vehicle seat can easily take the webbing. Further, when the arm is moved from the retracted position to the auxiliary position, the webbing is pinched by the pinching part, so that even if some external force is applied to the webbing, the webbing is difficult to come off from the pinching part. Accordingly, it is possible to improve the reliability of the wearing assistance operation when the seat belt is worn.

  According to the second aspect of the present invention, since the gripping of the webbing is released when the arm moves from the auxiliary position to the retracted position, the movement of the arm is prevented from being hindered by the webbing.

  According to the third aspect of the present invention, when the first drive unit is driven, the second drive unit is driven. Therefore, since the control unit only needs to control the first drive unit, the control in the control unit is simplified.

  According to the fourth aspect of the present invention, when the arm is disposed at the retracted position, the gripping portion allows the webbing to be moved by the occupant, and the webbing by the take-up mechanism that winds the webbing is performed. The webbing is pinched so as to prohibit winding. Therefore, when the occupant pulls out the webbing from the take-up mechanism with the seat belt attached, the pulled-out webbing is kept in the state of being pulled out by the gripping portion. Therefore, the occupant can eliminate the feeling of pressure when wearing the seat belt by pulling out the webbing and adjusting its length. Further, since it is possible to adjust the tension when the seat belt is worn by the seat belt wearing assist device in this way, it is not necessary to provide a separate tension adjusting mechanism for the purpose of the tension relief. Therefore, the number of parts can be reduced.

  According to the fifth aspect of the present invention, when it is determined that the vehicle collides, the control unit releases the gripping of the seat belt by the gripping unit. Therefore, when it is determined that the vehicle collides, when the webbing is taken up by the take-up mechanism, the gripping portion is prevented from interfering with the webbing take-up operation.

  According to the sixth aspect of the present invention, when the passenger is not seated on the vehicle seat, the arm is disposed at the retracted position. Accordingly, since the arm is disposed at the retracted position when the passenger gets on and off, the arm is prevented from being prevented from getting on and off.

  ADVANTAGE OF THE INVENTION According to this invention, the seatbelt mounting assistance apparatus with which the reliability of the mounting | wearing assistance operation | movement at the time of seatbelt mounting is improved can be provided.

(First embodiment)
A first embodiment of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, a vehicle seat 1 on which an occupant is seated and a seat belt 2 that restrains the occupant seated on the vehicle seat 1 are provided in the interior of the vehicle. The vehicle seat 1 of the present embodiment is a rear seat of a vehicle, and includes a seat cushion 3 on which an occupant is seated, and a seat back 4 that is erected on the rear end portion of the seat cushion 3 and holds the posture of the occupant. Yes. And the seatbelt mounting assistance apparatus 20 which assists a passenger | crew's mounting | wearing of the seatbelt 2 is arrange | positioned between the seat back 4 and the side wall 5a of a vehicle interior.

  The seat belt 2 includes a belt-like webbing 6 that restrains an occupant, a tongue plate 7 that is movably attached to the longitudinal direction of the webbing 6, and a tongue plate 7 that is disposed on the side of the vehicle seat 1. And a buckle 8 to be joined. Further, as shown in FIG. 2, a through anchor 9 is provided at a position above the shoulder 4 a on the side wall 5 a side of the passenger compartment in the seat back 4 and closer to the rear of the seat back 4. The webbing 6 having one end fixed at a position near the side wall 5a of the passenger compartment on the rear side surface of the seat cushion 3 is inserted into the through anchor 9, and the other end is provided on the rear side of the vehicle seat 1. It is wound around a winding device 10 (see FIG. 3). The seat belt retractor 10 is, for example, an ELR (emergency locking retractor) unit, and the webbing 6 is wound around a drum (not shown) of the ELR unit.

  As shown in FIG. 3, the seat belt wearing assistance device 20 includes a driving motor 23, a wearing assistance arm 21 that is rotated by the driving motor 23 via a gear 22, and a clip provided at the tip of the wearing assistance arm 21. A grip portion 24, a linear actuator 25 that drives the grip portion 24, and a control device 26 that controls the drive motor 23 and the linear actuator 25 are provided. The seat belt wearing assistance device 20 is fixed to a surface of the seat back 4 on the side wall 5a side of the passenger compartment via a bracket (not shown). The drive motor 23 constitutes a first drive unit, and the linear actuator 25 constitutes a second drive unit.

  The mounting auxiliary arm 21 has a substantially quadrangular prism shape. The gear 22 is provided at the base end portion of the mounting auxiliary arm 21, and the mounting auxiliary arm 21 is configured to be rotatable integrally with the gear 22. When the drive motor 23 is rotated, the rotation of the drive motor 23 is transmitted to the gear 22 via a gear 28 fixed to an output shaft (not shown) of the drive motor 23. Thereby, the mounting auxiliary arm 21 is rotated in the front-rear direction of the vehicle with the center of the gear 22 as the rotation center. Specifically, the mounting auxiliary arm 21 includes a storage position that is disposed on the side of the seat back 4 along the standing direction of the seat back 4 and an auxiliary position that is on the front side of the vehicle seat 1 with respect to the storage position. The vehicle seat 1 is rotated along the front-rear direction. In FIG. 3, the mounting auxiliary arm 21 arranged at the storage position is shown by a solid line, and the mounting auxiliary arm 21 arranged at the auxiliary position is shown by a two-dot chain line. The mounting auxiliary arm 21 disposed at the storage position is positioned at the center of the seat back 4 in the thickness direction, and the distal end of the mounting auxiliary arm 21 is disposed behind the front surface 4 b of the seat back 4. On the other hand, the mounting auxiliary arm 21 arranged at the auxiliary position is rotated from the retracted position to the front side of the vehicle seat 1, and the tip of the mounting auxiliary arm 21 is arranged ahead of the front surface 4 b of the seat back 4. The

  As shown in FIG. 4, the gripping portion 24 extends from the tip of the mounting auxiliary arm 21 along the left-right direction of the vehicle seat 1 so as to be substantially perpendicular to the mounting auxiliary arm 21. And a rotating pinching member 32 provided to face the fixed pinching member 31. The gripping portion 24 is disposed in front of the through anchor 9 in a state where the mounting auxiliary arm 21 is disposed at the retracted position (see FIG. 2).

  The fixed gripping member 31 has a substantially quadrangular prism shape with the same thickness as the mounting auxiliary arm 21, and the length along the left-right direction of the vehicle seat 1 (same as the longitudinal direction of the fixed gripping member 31) is It is formed longer than the width of the webbing 6. An extending portion 31 a extending in parallel with the mounting auxiliary arm 21 toward the base end of the mounting auxiliary arm 21 is formed at the distal end of the fixed clamping member 31. The length of the extending portion 31 a in the extending direction is substantially equal to the length along the longitudinal direction of the mounting auxiliary arm 21 in the fixed clamping member 31.

  The rotating pinching member 32 has a substantially quadrangular prism shape similar to that of the fixed pinching member 31. The length of the rotating gripping member 32 along the left-right direction of the vehicle seat 1 is shorter than the length of the fixed gripping member 31 along the same direction by the length of the extending portion 31a. The proximal end portion of the rotating gripping member 32 is inserted into a through hole 21 a formed to penetrate the distal end portion of the mounting auxiliary arm 21 in the left-right direction of the vehicle seat 1. In addition, the base end portion of the rotation clamping member 32 is bridged between the two side wall portions 21b (only one is shown) constituting the through hole 21a so as to be orthogonal to the longitudinal direction of the mounting auxiliary arm 21. The pin 34 is rotatably supported.

  The fixed gripping member 31 and the rotating gripping member 32 have gripping surfaces 31b and 32b that face each other. The pinching surface 31 b is a surface between the mounting auxiliary arm 21 and the extending portion 31 a in the fixed pinching member 31, and the pinching surface 32 b is not inserted into the through hole 21 a of the rotating pinching member 32. This is the surface of the part that faces the gripping surface 31b. The webbing 6 fed from the seat belt retractor 10 passes through the through anchor 9 and then is fixed to the seat cushion 3 between the gripping surfaces 31b and 32b (see FIGS. 2 and 3). . An anti-slip member 33 is fixed to the pinching surface 32b in order to prevent the webbing 6 from slipping with respect to the fixed pinching member 31 and the rotating pinching member 32. The anti-slip member 33 is a plate-like member formed of a felt, a rubber member, or the like.

  As shown in FIGS. 4 and 5, when the rotating gripping member 32 rotates around the pin 34, the gripping surface 32 b of the rotating gripping member 32 with respect to the gripping surface 31 b of the fixed gripping member 31. Come and go. Then, as shown in FIG. 4, the rotary gripping member 32 has a corner 32c on the base end side and the fixed gripping member 31 side that contacts the fixed gripping member 31 (the inner peripheral surface of the through hole 21a). By contact, rotation of the pinching surface 32b in a direction away from the pinching surface 31b is stopped. In the state where the corner portion 32c is in contact with the fixed clamping member 31, the periphery of the webbing 6 interposed between the clamping surfaces 31b and 32b is the fixed clamping member 31, the rotating clamping member 32, and the extending portion. The webbing 6 is prevented from coming off between the gripping surfaces 31b and 32b.

  The mounting assist arm 21 is formed with a housing recess 21c so as to be continuous with the through hole 21a. The housing recess 21c is provided on the base end side of the mounting auxiliary arm 21 in the through hole 21a. And the linear actuator 25 which drives the clamping part 24 is accommodated in this accommodation recessed part 21c. The linear actuator 25 includes a movable shaft 25a that is moved to the proximal end side of the auxiliary mounting arm 21 along the axial direction when energized. The distal end of the movable shaft 25 a is connected to the proximal end portion of the rotation clamping member 32. Specifically, the movable shaft 25a is connected to the opposite side of the pinching surface 32b with the pin 34 interposed therebetween in the rotating pinching member 32. In addition, the movable shaft 25a and the rotation gripping member 32 are coupled so as to allow mutual rotation. A compression coil spring 36 is disposed on the outer periphery of the movable shaft 25a. The compression coil spring 36 urges the proximal end portion of the rotary clamping member 32 toward the fixed clamping member 31.

  In the gripping portion 24 configured as described above, when the linear actuator 25 is energized, as shown in FIG. 5, the movable shaft 25a is moved to the proximal end side of the mounting auxiliary arm 21, and rotates accordingly. The proximal end portion of the pinching member 32 is moved to the proximal end side of the mounting auxiliary arm 21 against the urging force of the compression coil spring 36. Thereby, the rotation clamping member 32 is rotated so that the clamping surface 32 b of the rotation clamping member 32 approaches the clamping surface 31 b of the fixed clamping member 31. Then, the webbing 6 interposed between the fixed gripping member 31 and the rotational gripping member 32 is sandwiched between the gripping surfaces 31b and 32b, and the fixed gripping member 31 and the rotational gripping member 32 serve as the webbing 6. It is pinched from both sides in the thickness direction. The gripping force by the fixed gripping member 31 and the rotating gripping member 32 is larger than the force by which the seat belt winding device 10 winds the webbing 6, but the occupant holds the webbing 6 in the longitudinal direction of the webbing 6. It is a force that can move along.

  On the other hand, when the energization to the linear actuator 25 is stopped, as shown in FIG. 4, the urging force of the compression coil spring 36 moves the proximal end of the rotary clamping member 32 toward the fixed clamping member 31, The rotating gripping member 32 is rotated so that the gripping surface 32b moves away from the gripping surface 31b. Thereby, the gripping of the webbing 6 by the fixed gripping member 31 and the rotating gripping member 32 is released. And the corner | angular part 32c of the rotation clamping member 32 contact | abuts to the fixed clamping member 31, and rotation of the rotation clamping member 32 is stopped.

Next, the electrical configuration of the seatbelt wearing auxiliary device 20 will be described.
As shown in FIG. 6, the control device 26 is input from a seating sensor 41, a door opening / closing switch 42, a seat belt wearing switch 43, a buckle switch 44, an arm position detection sensor 45, a collision prediction sensor 46, and a tension adjustment switch 47. Based on the signal, the power supply device 48 is controlled to drive the drive motor 23 and the linear actuator 25. The control device 26 includes a timer circuit (not shown).

  The seating sensor 41 is seating detection means for detecting whether or not an occupant is seated on the seat cushion 3, and is configured by, for example, a pressure sensor provided on the seat cushion 3. The control device 26 recognizes whether or not the occupant is seated on the vehicle seat 1 based on the seating detection signal input from the seating sensor 41.

  The door open / close switch 42 is for detecting the open / closed state of the door 5 b provided on the side of the vehicle seat 1. The door open / close switch 42 outputs an open / close detection signal corresponding to the open / closed state of the door to the control device 26. The control device 26 recognizes the open / closed state of the door 5b (see FIGS. 1 and 2) based on the open / close detection signal.

  The seat belt wearing switch 43 is provided on the door panel on the vehicle interior side of the door 5 b provided on the side of the vehicle seat 1. When the seat belt wearing switch 43 is operated by an occupant seated on the vehicle seat 1, the seat belt wearing switch 43 outputs a seat belt wearing signal to the control device 26. When the seat belt wearing signal is input, the control device 26 determines that the occupant seated on the vehicle seat 1 has an intention to wear the seat belt 2.

  The buckle switch 44 is seat belt wearing detection means for detecting whether or not the seat belt 2 is worn by a passenger. The buckle switch 44 outputs a mounting detection signal corresponding to whether or not the seat belt 2 is mounted to the control device 26. The control device 26 recognizes whether or not the seat belt 2 is worn based on the wearing detection signal.

  The arm position detection sensor 45 detects an arm storage position detection switch 45a for detecting that the mounting auxiliary arm 21 is disposed at the storage position, and detects that the mounting auxiliary arm 21 is disposed at the auxiliary position. Arm auxiliary position detection switch 45b. The arm storage position detection switch 45a and the arm auxiliary position detection switch 45b are, for example, limit switches. Then, the arm storage position detection switch 45a outputs a storage position detection signal when the mounting auxiliary arm 21 is disposed at the storage position. On the other hand, the arm auxiliary position detection switch 45b outputs an auxiliary position detection signal when the mounting auxiliary arm 21 is disposed at the auxiliary position. The control device 26 detects the rotational position of the mounting auxiliary arm 21 based on the storage position detection signal and the auxiliary position detection signal, and controls the drive motor 23 according to the detection result.

  The collision prediction sensor 46 is a collision prediction unit that predicts the collision of the vehicle including the vehicle seat 1 and is configured by, for example, a speed sensor that detects a brake depression speed. Based on the collision prediction signal input from the collision prediction sensor 46, the control device 26 predicts that the vehicle will collide, for example, when the brake is stepped on rapidly.

  The tension adjustment switch 47 is provided on the door panel on the vehicle interior side of the door 5 b provided on the side of the vehicle seat 1. The tension adjustment switch 47 is for instructing the tension adjustment of the webbing 6 for the purpose of the tension releaser by the seat belt wearing assist device 20. When the passenger operates the tension adjustment switch 47, the tension adjustment switch 47 outputs a tension adjustment instruction signal to the control device 26.

Next, the operation of the seatbelt wearing auxiliary device 20 configured as described above will be described.
In a state where the occupant is not seated on the vehicle seat 1, the control device 26 places the mounting assist arm 21 in the retracted position as shown in FIG. 1. At this time, as shown in FIG. 2, the mounting auxiliary arm 21 disposed in the retracted position is located at the center of the seat back 4 in the thickness direction, and the tip of the mounting auxiliary arm 21 is located on the front surface of the seat back 4. It arrange | positions behind 4b. Accordingly, the gripping portion 24 provided at the tip of the mounting auxiliary arm 21 is disposed above the shoulder portion 4 a of the seat back 4. For this reason, the passenger's getting on and off of the vehicle is prevented from being obstructed by the seat belt wearing assistance device 20. Further, when the occupant is not seated on the vehicle seat 1, the gripping of the webbing 6 by the gripping portion 24 is released.

  When the occupant sits on the vehicle seat 1 and closes the door 5b on the side of the vehicle seat 1, a seating detection signal indicating that the occupant is seated on the vehicle seat 1 is output from the seating sensor 41, and the door An open / close detection signal indicating that the door 5b is closed is output from the open / close switch 42. Based on these seating detection signals and opening / closing detection signals, the control device 26 determines that an occupant has boarded the vehicle and seated on the vehicle seat 1.

  Next, when the seat belt wearing switch 43 is operated by an occupant seated on the vehicle seat 1 and a seat belt wearing signal is input from the seat belt wearing switch 43, the control device 26 intends to attach the seat belt 2 to the occupant. It is determined that the linear actuator 25 is energized from the power supply device 48. In addition, the control device 26 energizes the drive motor 23 from the power supply device 48 so that the drive motor 23 rotates forward.

  Then, the movable shaft 25a of the linear actuator 25 is moved to the proximal end side of the auxiliary mounting arm 21, and accordingly, the rotary clamping member 32 is rotated so that the clamping surface 32b approaches the clamping surface 31b. The webbing 6 interposed between the clamping surfaces 31b and 32b is clamped by the fixed clamping member 31 and the rotating clamping member 32.

  Further, when the drive motor 23 is rotated forward, the mounting auxiliary arm 21 is rotated from the storage position toward the auxiliary position. At this time, since the webbing 6 is pinched by the fixed pinching member 31 and the rotating pinching member 32, the webbing 6 is pulled out from the seat belt retractor 10 as the auxiliary mounting arm 21 rotates, and the vehicle seat. 1 is moved to the front side. When the mounting auxiliary arm 21 is disposed at the auxiliary position, an auxiliary position detection signal is input to the control device 26 from the arm auxiliary position detection switch 45b. The control device 26 detects that the mounting auxiliary arm 21 is disposed at the auxiliary position based on the auxiliary position detection signal, and causes the power supply device 48 to stop energizing the drive motor 23. Thereby, the mounting auxiliary arm 21 is stopped at the auxiliary position.

  The tip of the mounting auxiliary arm 21 arranged at the auxiliary position is arranged in front of the front surface 4 b of the seat back 4. Accordingly, the gripping portion 24 provided at the tip of the mounting auxiliary arm 21 is disposed in front of the front surface 4 b of the seat back 4. Therefore, when the mounting auxiliary arm 21 is disposed at the auxiliary position, the webbing 6 is pulled out to the front side of the vehicle seat 1 and is moved to a position where the passenger sitting on the vehicle seat 1 can easily take the webbing 6. .

  Next, when the occupant picks up the webbing 6 pulled out from the seat belt retractor 10 and moved forward, and further pulls out the webbing 6 from the seat belt retractor 10 to engage the tongue plate 7 with the buckle 8, An attachment detection signal indicating that the seat belt 2 is attached is input from the buckle switch 44 to the control device 26. The control device 26 determines that the occupant has worn the seat belt based on the mounting detection signal, and causes the power supply device 48 to stop energizing the linear actuator 25. In addition, the control device 26 energizes the drive motor 23 from the power supply device 48 so that the drive motor 23 rotates in the reverse direction.

  Note that the control device 26 does not receive a mounting detection signal indicating that the seat belt 2 has been mounted from the buckle switch 44 after a certain period of time has elapsed after the mounting assist arm 21 has been placed at the assist position. Then, the power supply device 48 stops energization of the linear actuator 25. At the same time, the control device 26 energizes the drive motor 23 from the power supply device 48 so as to reversely rotate the drive motor 23 in order to place the auxiliary mounting arm 21 in the retracted position. In addition, when the door 5b is opened while the mounting assist arm 21 is disposed at the mounting assist position, the control device 26 opens and closes that the door 5b input from the door opening / closing switch 42 is opened. Based on the detection signal, it is determined that the occupant seated on the vehicle seat 1 has an intention to get off. Then, the control device 26 causes the power supply device 48 to stop energizing the linear actuator 25, and the drive motor 23 is reversed from the power supply device 48 to the drive motor 23 in order to place the mounting auxiliary arm 21 in the retracted position. Energize to rotate.

  When the energization of the linear actuator 25 is stopped, the base end of the rotating pinching member 32 is moved to the fixed pinching member 31 side by the biasing force of the compression coil spring 36, and the pinching surface 32b is pinched by the pinching surface 31b. The rotating pinching member 32 is rotated so as to move away from it. Thereby, the gripping of the webbing 6 by the fixed gripping member 31 and the rotating gripping member 32 is released.

  When the drive motor 23 is rotated in the reverse direction, the mounting auxiliary arm 21 is rotated from the auxiliary position toward the storage position. At this time, since the gripping of the webbing 6 by the fixed gripping member 31 and the rotating gripping member 32 is released, the excessively pulled out webbing 6 is wound around the seat belt as the mounting auxiliary arm 21 rotates. The take-up device 10 is wound up. When the auxiliary mounting arm 21 is placed at the storage position, a storage position detection signal is input to the control device 26 from the arm storage position detection switch 45a. The control device 26 detects that the mounting auxiliary arm 21 is disposed at the storage position based on the storage position detection signal, and causes the power supply device 48 to stop energizing the drive motor 23. As a result, the mounting assist arm 21 is stopped at the retracted position, and the assisting operation when the occupant is seated is completed.

  When the tension adjustment switch 47 is operated by the occupant and a tension adjustment signal is input to the control device 26, the control device 26 applies the vehicle seat 1 to the vehicle seat 1 based on the seating detection signal, the mounting detection signal, and the storage position detection signal. It is determined whether the occupant is seated, whether the mounting assist arm 21 is in the retracted position, and whether the occupant is wearing the seat belt 2. When it is determined that the occupant is seated on the vehicle seat 1 and is wearing the seat belt 2 and the mounting auxiliary arm 21 is in the retracted position, the control device 26 changes the power supply device 48 to the linear actuator 25. Energize. As a result, the webbing 6 is pinched by the pinching portion 24. At this time, the gripping force by the fixed gripping member 31 and the rotating gripping member 32 is larger than the force by which the seat belt retractor 10 winds the webbing 6, but the occupant holds the webbing 6 on the webbing 6. It is a force of a magnitude that can move along the longitudinal direction. In other words, the linear actuator 25 rotates the rotary gripping member 32 so as to allow the movement of the webbing 6 by the occupant and prohibit the winding of the webbing 6 by the seat belt winding device 10.

  Therefore, when the occupant pulls out the webbing 6 while the webbing 6 is gripped by the gripping part 24, the pulled-out webbing 6 is prevented (prohibited) from being wound around the seat belt retractor 10 by the gripping part 24. ) That is, the pulled out webbing 6 is kept in a state of being pulled out by the gripping portion 24. Therefore, the occupant can eliminate the feeling of pressure when the seat belt is worn by pulling out the webbing 6 and adjusting the length thereof. At this time, since the anti-slip member 33 is provided on the gripping surface 31b, the pulled-out webbing 6 is further prevented from slipping between the gripping surfaces 31b and 32b and being wound on the seat belt retractor 10. ing.

  In addition, when the webbing 6 is pinched by the pinching unit 24 based on the tension adjustment signal, when the collision prediction signal is input from the collision prediction sensor 46 to the control device 26, the control device 26 supplies power. The device 48 is de-energized to the linear actuator 25, and the gripping of the webbing 6 by the gripping portion 24 is released. At the same time, the control device 26 causes the seat belt winding device 10 to wind the webbing 6. Further, in this case, when the tongue plate 7 is removed from the buckle 8 by the occupant seated on the vehicle seat 1, a mounting detection signal indicating that the mounting of the seat belt 2 is released from the buckle switch 44 to the control device 26. Entered. When the mounting detection signal is input, the control device 26 causes the power supply device 48 to stop energizing the linear actuator 25 and releases the gripping of the webbing 6 by the gripping portion 24. Further, in this case, when the door 5b is opened, the control device 26 is seated on the vehicle seat 1 based on an open / close detection signal indicating that the door 5b is opened from the door open / close switch 42. It is determined that the occupant who has been willing to get off. Then, the control device 26 causes the power supply device 48 to stop energizing the linear actuator 25 and releases the gripping of the webbing 6 by the gripping portion 24. The webbing 6 from which the pinching has been released is wound up by the seat belt winding device 10.

As described above, according to the first embodiment, the following operations and effects are provided.
(1) When the occupant seated on the vehicle seat 1 wears the seat belt 2, the control device 26 drives the drive motor 23 to move the mounting auxiliary arm 21 disposed at the storage position to the auxiliary position. At this time, the control device 26 controls the power supply device 48 to energize the linear actuator 25 and drives the gripping portion 24 so as to grip the webbing 6 from both sides in the thickness direction. Accordingly, since the mounting auxiliary arm 21 is moved to the auxiliary position in a state where the gripping portion 24 clamps the webbing 6, the webbing 6 is pulled out with the movement of the mounting auxiliary arm 21 and the front side of the vehicle seat 1. Moved to. As a result, the webbing 6 is moved to a position where it can be easily taken by the passenger, and the passenger sitting on the vehicle seat 1 can easily take the webbing 6. Further, since the webbing 6 is pinched by the pinching portion 24 when the mounting assist arm 21 is moved from the storage position to the auxiliary position, the webbing 6 is pinched even if some external force is applied to the webbing 6. Difficult to come off from part 24. Accordingly, it is possible to improve the reliability of the wearing assistance operation when the seat belt is worn.

  (2) When the occupant gets on and off, the mounting auxiliary arm 21 is disposed in the retracted position. Accordingly, it is possible to prevent the occupant from getting in and out of the vehicle by the mounting assist arm 21, and the occupant can get in and out smoothly.

  (3) When the mounting auxiliary arm 21 rotates from the auxiliary position to the retracted position, the pinching of the webbing 6 by the pinching portion 24 is released. Accordingly, the excessively pulled out webbing 6 is wound around the seat belt retractor 10 as the auxiliary mounting arm 21 rotates. In addition, since the gripping of the webbing 6 is released, the rotation of the mounting auxiliary arm 21 is smoothly performed without being disturbed by the webbing 6.

  (4) When the tension adjustment signal is input from the tension adjustment switch 47, the control device 26 has the occupant seated on the vehicle seat 1 and wearing the seat belt 2, and the attachment auxiliary arm 21 is in the retracted position. When the determination is made, the rotating gripping member 32 is driven to grip the webbing 6 by the gripping portion 24. At this time, the gripping unit 24 grips the webbing 6 so as to allow the occupant to move the webbing 6 and prohibit the seat belt winding device 10 from winding the webbing 6. Therefore, the occupant can eliminate the feeling of pressure when the seat belt is worn by pulling out the webbing 6 and adjusting the length thereof. As a result, the comfort of the passenger seated on the vehicle seat 1 can be improved.

  In addition, since it is possible to adjust the tension when the seat belt is worn by the seat belt wearing assist device 20 as described above, a separate tension adjusting mechanism for the purpose of the tension releaser need not be provided. Therefore, the number of parts can be reduced.

  (5) When the webbing 6 is gripped by the gripping unit 24 based on the tension adjustment signal, when the collision prediction signal is input from the collision prediction sensor 46 to the control device 26, the control device 26 The gripping of the webbing 6 by the grip portion 24 is released. Therefore, when the webbing 6 is taken up by the seat belt winding device 10 based on the collision prediction of the vehicle, the gripping portion 24 is prevented from hindering the winding operation of the webbing 6. As a result, the restraining force of the occupant by the seat belt 2 can be ensured when the vehicle collision is predicted.

  (6) Even when the pinching of the webbing 6 by the pinching part 24 is released, the periphery of the webbing 6 interposed between the pinching surfaces 31b and 32b is the fixed pinching member 31 and the rotary pinching. It is surrounded by the member 32 and the extending part 31a. Therefore, even if some external force is applied to the webbing 6 when the gripping of the webbing 6 by the gripping part 24 is released, the webbing 6 is unlikely to come off between the gripping surfaces 31b and 32b. As a result, it is possible to further improve the certainty of the wearing assist operation when the seat belt is worn.

  (7) The gripping portion 24 is provided so as to be rotatable with respect to the fixed gripping member 31 and a fixed gripping member 31 extending from the tip of the mounting assisting arm 21 in a direction orthogonal to the mounting assisting arm 21. The rotating pinching member 32 is provided. And the pinching of the webbing 6 and pinching cancellation | release are easily performed by rotating the rotation pinching member 32 centering on the pin 34 as a rotating shaft. Thus, since the webbing 6 is gripped by the gripping part 24 having a simple configuration, the manufacturing cost can be reduced.

  (8) Since the mounting auxiliary arm 21 is disposed at the retracted position based on the fact that the occupant has worn the seat belt 2, the mounting auxiliary arm 21 is prevented from interfering with the occupant seated on the vehicle seat 1. The In addition, the occupant may not operate the switch in order to place the mounting assist arm 21 in the retracted position. Accordingly, it is possible to eliminate the burden on the occupant because the mounting auxiliary arm 21 is disposed at the retracted position after the seat belt is mounted.

(Second Embodiment)
Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. In addition, about the structure same as the said 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 8, the seatbelt mounting assist device 50 of the second embodiment includes a drive motor 23, a mounting assist arm 51 that is rotated by the drive motor 23 via the gear 22, and the mounting assist arm 51. A gripping portion 24 provided at the tip, a link mechanism 52 for driving the gripping portion 24, and a control device 26 (see FIG. 7) for controlling the drive motor 23 are provided. Similar to the seat belt wearing assistance device 20 of the first embodiment, the seat belt wearing assistance device 50 is fixed to the surface of the seat back 4 on the side wall 5a side of the passenger compartment via a bracket (not shown). The drive motor 23 constitutes a first drive unit, and the link mechanism 52 constitutes a second drive unit and an interlocking mechanism.

  The mounting auxiliary arm 51 has a substantially square shape, similar to the mounting auxiliary arm 21 of the first embodiment. A gripping portion 24 similar to that in the first embodiment is provided at the tip of the mounting auxiliary arm 51. That is, at the distal end of the mounting auxiliary arm 51, a fixed gripping member 31 extending from the distal end so as to be substantially perpendicular to the mounting auxiliary arm 51, and a rotary gripping grip arranged to face the fixed clamping member 31. A member 32 is provided. The mounting auxiliary arm 51 includes, in order from the distal end side of the mounting auxiliary arm 51, a through hole 51a similar to the through hole 21a of the first embodiment, an accommodation recess 51b formed to be continuous with the through hole 51a, And the rod insertion hole 51c extended along the longitudinal direction of the mounting auxiliary arm 51 is formed. The base end portion of the rotating pinching member 32 is inserted into the through hole 51a and is supported by the pin 34 so as to be rotatable.

  An arm support portion 53 is integrally formed at the base end of the mounting auxiliary arm 51. The arm support portion 53 has a substantially disk shape having a diameter substantially equal to that of the gear 22 disposed on the proximal end side of the mounting auxiliary arm 51. The arm support portion 53 is assembled so as to be rotatable relative to the gear 22. The arm support 53 is formed with a guide hole 54 through which a pin member 61 of a link mechanism 52 described later is inserted. The guide hole 54 is located at a position displaced radially outward from the rotation center of the arm support portion 53 (same as the rotation center of the gear 22), and the arm support portion 53 sandwiches the rotation center of the arm support portion 53 to assist the mounting. It is formed at a position opposite to the arm 51 in the radial direction. The guide hole 54 has an arc shape with the center of curvature as the center of rotation of the arm support portion 53. The guide hole 54 rotates in the reverse direction (the direction in which the mounting auxiliary arm 51 is rotated from the auxiliary position to the retracted position in the CCW direction in the figure) from the position on the longitudinal extension line of the mounting auxiliary arm 51. It extends along the direction of rotation of the gear 22 when it is rotated.

  The link mechanism 52 is for driving the pinching portion 24 to pinch and release the webbing 6. The link mechanism 52 has a pin member 61 that rotates integrally with the gear 22 and one end connected to the pin member 61. And a rod 63 connected to the other end of the link member 62 and inserted into the rod insertion hole 51c.

  The pin member 61 has a substantially cylindrical shape, and the axial length thereof is formed to be substantially equal to the thickness of the arm support portion 53. The pin member 61 is fixed at a position displaced radially outward from the rotation center of the gear 22 and is inserted through the guide hole 54. When the drive motor 23 is driven and the gear 22 is rotated, the pin member 61 is moved along the circumferential direction in the guide hole 54 by the gear 22. In the second embodiment, at both ends of the guide hole 54 in the circumferential direction, the end on which the pin member 61 abuts when the drive motor 23 is rotated forward (that is, the gear 22 is rotated in the CW direction in FIG. 8). The first end portion T1 is the end portion, and the end portion with which the pin member 61 abuts when the drive motor 23 is rotated reversely (that is, the gear 22 is rotated in the CCW direction in FIG. 8) is the second end portion T2.

  One end of the link member 62 is connected to the tip of the pin member 61. The link member 62 is formed to have a length substantially equal to the diameter of the arm support portion 53. The rod 63 is formed to be substantially equal to the length of the mounting auxiliary arm 51 in the longitudinal direction, and the end of the mounting auxiliary arm 51 on the proximal end side protrudes from the rod insertion hole 51c. The other end of the link member 62 is connected to the protruding end portion of the rod 63. The other end of the rod 63 (the end portion on the distal end side of the auxiliary mounting arm 51) is connected to the proximal end portion of the rotational clamping member 32.

  The other end of the rod 63 is inserted into the receiving recess 51b, and a compression coil spring 65 received in the receiving recess 51b is disposed on the outer periphery of the other end of the rod 63. The compression coil spring 65 urges the proximal end portion of the rotary clamping member 32 toward the fixed clamping member 31 and suppresses rattling of the rotary clamping member 32.

  In the link mechanism 52 configured as described above, the pin member 61 is in contact with the second end T2 of the guide hole 54 in a state where the mounting auxiliary arm 51 is disposed at the retracted position. Therefore, the rod 63 is moved to the distal end side of the auxiliary mounting arm 51 via the link member 62, and pushes up the proximal end portion of the rotary gripping member 32 upward.

  When the drive motor 23 rotates forward, the gear 22 rotates in the CW direction in FIG. 8 via the gear 28, and the pin member 61 is moved along the guide hole 54 to the first end T1 of the guide hole 54. The At this time, the rotational force of the gear 22 is converted into a force in a direction of pulling the rod 63 downward by the pin member 61 and the link member 62, and the rod 63 is pulled downward. As a result, the proximal end portion of the rotating clamping member 32 is moved to the proximal end side of the auxiliary mounting arm 51 by the rod 63, and the clamping surface 32 b of the rotating clamping member 32 is clamped by the fixed clamping member 31. The rotation gripping member 32 is rotated so as to approach 31b. When the pin member 61 comes into contact with the first end T1 of the guide hole 54, the link member 62 and the rod 63 form a straight line, and are interposed between the fixed gripping member 31 and the rotating gripping member 32. The webbing 6 is sandwiched between the clamping surfaces 31b and 32b and is clamped from both sides in the thickness direction by the fixed clamping member 31 and the rotating clamping member 32. The gripping force by the fixed gripping member 31 and the rotating gripping member 32 is larger than the force by which the seat belt winding device 10 winds the webbing 6, but the occupant holds the webbing 6 in the longitudinal direction of the webbing 6. It is a force that can move along.

  After the pin member 61 abuts on the first end T1 of the guide hole 54, when the gear 22 is further rotated in the CW direction, the rotation of the gear 22 is transmitted to the arm support portion 53 via the pin member 61. . Accordingly, the mounting auxiliary arm 51 is rotated from the storage position toward the auxiliary position.

  On the other hand, in the state where the mounting auxiliary arm 51 is disposed at the auxiliary position, the pin member 61 is in contact with the first end T <b> 1 in the guide hole 54. Accordingly, the rod 63 has been moved to the proximal end of the auxiliary mounting arm 51 by the link member 62, and the proximal end of the rotating gripping member 32 is pushed down and the webbing 6 is gripped by the gripping portion 24. ing. When the drive motor 23 rotates in the reverse direction, the gear 22 rotates in the CCW direction in FIG. 8 via the gear 28, and the pin member 61 is moved along the guide hole 54 to the second end T 2 of the guide hole 54. The At this time, the rotational force of the gear 22 is converted into a force in a direction in which the rod 63 is pushed up by the pin member 61 and the link member 62, and the rod 63 is pushed up. As a result, the proximal end portion of the rotational clamping member 32 is moved to the distal end side of the auxiliary mounting arm 51 by the rod 63, and the clamping surface 32 b of the rotational clamping member 32 is clamped surface 31 b of the fixed clamping member 31. The rotating pinching member 32 is rotated so as to move away from it. Thereby, the gripping of the webbing 6 by the gripping part 24 is released.

  After the pin member 61 comes into contact with the second end T2 of the guide hole 54, when the gear 22 is further rotated in the CCW direction, the rotation of the gear 22 is transmitted to the arm support portion 53 via the pin member 61. . Therefore, the mounting auxiliary arm 51 is rotated from the auxiliary position toward the storage position.

  FIG. 7 shows an electrical configuration of the seat belt wearing assistance device 50 of the second embodiment. In the second embodiment, the rotation angle of the drive motor 23 and the rotation angle of the gear 22 are associated in advance, and the control device 26 uses, for example, a hall element provided in the drive motor 23 to drive the drive motor. By detecting the rotation angle 23, the rotation angle of the gear 22, that is, the position of the pin member 61 is detected.

Next, the operation of the seatbelt wearing auxiliary device 50 configured as described above will be described.
In a state where no occupant is seated on the vehicle seat 1, the control device 26 stores the mounting auxiliary arm 51 in the storage position in the same manner as the mounting auxiliary arm 21 of the first embodiment. Further, when the occupant is not seated on the vehicle seat 1, the pin member 61 is in contact with the second end T <b> 2 of the guide hole 54, and the gripping of the webbing 6 by the gripping portion 24 is released.

  When the occupant is seated on the vehicle seat 1 and the door 5b on the side of the vehicle seat 1 is closed, a seating detection signal indicating that the occupant is seated on the vehicle seat 1 is output from the seating sensor 41, and the door opening / closing switch 42 outputs an open / close detection signal indicating that the door 5b is closed. Based on these seating detection signals and opening / closing detection signals, the control device 26 determines that an occupant has boarded the vehicle and seated on the vehicle seat 1.

  Next, when the seat belt wearing switch 43 is operated by an occupant seated on the vehicle seat 1 and a seat belt wearing signal is input from the seat belt wearing switch 43, the control device 26 intends to attach the seat belt 2 to the occupant. The power supply device 48 energizes the drive motor 23 so that the drive motor 23 rotates forward.

  Then, the gear 22 is rotated in the CW direction, and the pin member 61 is moved toward the first end T1 in the guide hole 54. As the pin member 61 moves, the rod 63 is pulled down to the proximal end side of the auxiliary mounting arm 51 via the link member 62, and when the pin member 61 comes into contact with the first end T1, the webbing 6 is moved by the pinching portion 24. It is pinched. Thereafter, the gear 22 is further rotated, and the mounting auxiliary arm 51 is rotated from the storage position toward the auxiliary position. At this time, since the webbing 6 is pinched by the pinching portion 24, the webbing 6 is pulled out of the seat belt retractor 10 and moved to the front side of the vehicle seat 1 as the auxiliary mounting arm 51 rotates. . When the mounting auxiliary arm 51 is disposed at the auxiliary position, an auxiliary position detection signal is input to the control device 26 from the arm auxiliary position detection switch 45b. The control device 26 detects that the mounting auxiliary arm 51 is disposed at the auxiliary position based on the auxiliary position detection signal, and causes the power supply device 48 to stop energizing the drive motor 23. Thereby, the mounting auxiliary arm 51 is stopped at the auxiliary position.

  The tip of the mounting auxiliary arm 51 arranged at the auxiliary position is arranged in front of the front surface 4 b of the seat back 4. Therefore, when the mounting auxiliary arm 51 is disposed at the auxiliary position, the webbing 6 is pulled out to the front side of the vehicle seat 1 and is moved to a position where an occupant seated on the vehicle seat 1 can easily take the webbing 6. .

  Next, when the occupant picks up the webbing 6 pulled out from the seat belt retractor 10 and moved forward, and further pulls out the webbing 6 from the seat belt retractor 10 to engage the tongue plate 7 with the buckle 8, An attachment detection signal indicating that the seat belt 2 is attached is input from the buckle switch 44 to the control device 26. The control device 26 determines that the occupant has worn the seat belt based on the mounting detection signal, and energizes the drive motor 23 from the power supply device 48 so that the drive motor 23 rotates in the reverse direction.

  Note that the control device 26 does not receive a mounting detection signal indicating that the seat belt 2 has been mounted from the buckle switch 44 even after a certain period of time has elapsed after the mounting auxiliary arm 51 is disposed at the auxiliary position. In order to place the mounting auxiliary arm 51 in the retracted position, the power supply device 48 energizes the drive motor 23 so that the drive motor 23 rotates in the reverse direction. Further, when the door 5b is opened with the mounting auxiliary arm 51 placed at the auxiliary position, the control device 26 detects opening / closing that the door 5b input from the door opening / closing switch 42 is opened. Based on the signal, it is determined that the occupant seated in the vehicle seat 1 is willing to get off. Then, the control device 26 energizes the drive motor 23 from the power supply device 48 so as to reversely rotate the drive motor 23 so as to place the mounting auxiliary arm 51 in the retracted position.

  When the drive motor 23 is rotated in the reverse direction, the gear 22 is rotated in the CCW direction, and the pin member 61 is moved toward the second end T2 of the guide hole 54. As the pin member 61 moves, the rod 63 is pushed up to the distal end side of the auxiliary mounting arm 51 via the link member 62, and the pinching of the webbing 6 by the pinching portion 24 is released. Then, after the pin member 61 comes into contact with the second end portion T2, the gear 22 is further rotated, and the mounting auxiliary arm 51 is rotated from the auxiliary position toward the storage position.

  When the mounting auxiliary arm 51 is disposed at the storage position, a storage position detection signal is input to the control device 26 from the arm storage position detection switch 45a. The control device 26 detects that the mounting auxiliary arm 51 is disposed at the storage position based on the storage position detection signal, and causes the power supply device 48 to stop energizing the drive motor 23. As a result, the mounting assist arm 51 is stopped at the retracted position, and the assisting operation when the occupant is seated is completed.

  When the tension adjustment switch 47 is operated by the occupant and a tension adjustment signal is input to the control device 26, the control device 26 applies the vehicle seat 1 to the vehicle seat 1 based on the seating detection signal, the mounting detection signal, and the storage position detection signal. It is determined whether the occupant is seated, whether the mounting assist arm 51 is in the retracted position, and whether the occupant is wearing the seat belt 2. When it is determined that the occupant is seated on the vehicle seat 1 and is wearing the seat belt 2 and the mounting auxiliary arm 51 is in the retracted position, the control device 26 switches the power supply device 48 to the drive motor 23. Energization is performed so that the drive motor 23 rotates forward. The control device 26 causes the power supply device 48 to stop energization of the drive motor 23 when the pin member 61 is moved to a position where it comes into contact with the first end T1 of the guide hole 54. As a result, the webbing 6 is pinched by the pinching portion 24. At this time, the gripping force by the fixed gripping member 31 and the rotating gripping member 32 is larger than the force by which the seat belt retractor 10 winds the webbing 6, but the occupant holds the webbing 6 on the webbing 6. It is a force of a magnitude that can move along the longitudinal direction. Therefore, the occupant can eliminate the feeling of pressure when the seat belt is worn by pulling out the webbing 6 and adjusting the length thereof.

  In addition, when the webbing 6 is pinched by the pinching unit 24 based on the tension adjustment signal, when the collision prediction signal is input from the collision prediction sensor 46 to the control device 26, the control device 26 supplies power. The device 48 is energized so that the drive motor 23 rotates in the reverse direction, and the gripping of the webbing 6 by the gripping portion 24 is released. Therefore, when the webbing 6 is taken up by the seat belt winding device 10 based on the prediction of the collision of the vehicle, it is possible to prevent the webbing 6 from being hindered by the pinching portion 24. Further, in this case, when the tongue plate 7 is removed from the buckle 8 by the occupant seated on the vehicle seat 1, a mounting detection signal indicating that the mounting of the seat belt 2 is released from the buckle switch 44 to the control device 26. Entered. When the attachment detection signal is input, the control device 26 energizes the power supply device 48 so that the drive motor 23 rotates in the reverse direction, and releases the gripping of the webbing 6 by the gripping portion 24. Furthermore, in this case, when the door 5b is opened, the control device 26 energizes the power supply device 48 so that the drive motor 23 rotates in the reverse direction, and grips the webbing 6 by the grip portion 24. To release. The webbing 6 from which the pinching has been released is wound up by the seat belt winding device 10.

As described above, according to the second embodiment, in addition to the same operations and effects as (2) to (8) of the first embodiment, the following operations and effects are provided.
(1) When the occupant seated on the vehicle seat 1 wears the seat belt 2, the control device 26 drives the drive motor 23 to move the mounting auxiliary arm 51 disposed at the storage position to the auxiliary position. At this time, the control device 26 controls the power supply device 48 to drive the drive motor 23 to drive the link mechanism 52, so that the webbing 6 is pinched from both sides in the thickness direction. Drive. Accordingly, since the mounting auxiliary arm 51 is moved to the auxiliary position in a state where the gripping portion 24 clamps the webbing 6, the webbing 6 is pulled out with the movement of the mounting auxiliary arm 51 and the front side of the vehicle seat 1. Moved to. As a result, the webbing 6 is moved to a position where it can be easily taken by the passenger, and the passenger sitting on the vehicle seat 1 can easily take the webbing 6. Further, since the webbing 6 is pinched by the pinching part 24 when the mounting auxiliary arm 51 is moved from the storage position to the auxiliary position, the webbing 6 is pinched even if some external force is applied to the webbing 6. Difficult to come off from part 24. Accordingly, it is possible to improve the reliability of the wearing assistance operation when the seat belt is worn.

  (2) When the drive motor 23 is driven, the link mechanism 52 is driven, and the rotation gripping member 32 is driven by the link mechanism 52 and the webbing 6 is sandwiched by the gripping portion 24. In other words, in the second embodiment, the control device 26 can perform both the drive of the rotary gripping member 32 and the rotation of the auxiliary mounting arm 51 by controlling the drive motor 23. Therefore, since the linear actuator 25 does not have to be controlled to drive the rotary gripping member 32 as in the control device 26 of the first embodiment, the control in the control device 26 of the second embodiment is simplified. Can be In addition, the seatbelt attachment assisting device 50 can be made cheaper than the case where the linear actuator 25 is provided to rotate the rotation gripping member 32.

In addition, you may change embodiment of this invention as follows.
In each of the above embodiments, the anti-slip member 33 is fixed to the gripping surface 32 b of the rotating gripping member 32. However, instead of fixing the anti-slip member 33 to the pinching surface 32b, the pinching surface 32b may be processed to be jagged. In this way, the number of parts can be reduced.

  In each of the above embodiments, the arm position detection sensor 45 includes two switches, an arm retracted position detection switch 45a and an arm auxiliary position detection switch 45b, in order to detect the positions of the mounting auxiliary arms 21 and 51. . However, the arm position detection sensor 45 may detect the position of the auxiliary mounting arms 21 and 51 using the rotation angle of the drive motor 23. For example, the positions of the auxiliary mounting arms 21 and 51 and the rotation position of the drive motor 23 are associated in advance, and based on a detection signal corresponding to the rotation angle of the drive motor 23 output from the arm position detection sensor 45, The control device 26 may be configured to detect the positions of the mounting auxiliary arms 21 and 51.

  In each of the above embodiments, the tension adjustment switch 47 is operated by an occupant seated on the vehicle seat 1 to adjust the tension of the webbing 6 when the seat belt 2 is mounted. However, the control device 26 controls the webbing 6 to be pinched by the pinching unit 24 based on the fact that the mounting auxiliary arms 21 and 51 are disposed at the storage position after the occupant wears the seat belt 2. Also good. Further, the control device 26 grasps the webbing 6 by the grasping portion 24 based on the fact that a predetermined time has elapsed after the attachment auxiliary arms 21 and 51 are disposed at the storage position after the occupant has attached the seat belt 2. You may control as follows. Even if it does in this way, the effect | action and effect similar to the effect | action and effect of (4) of the said 1st Embodiment can be acquired. Furthermore, since the occupant does not have to operate the tension adjustment switch 47, the burden on the occupant to adjust the tension is reduced.

  In each of the above embodiments, the case where the seating detection unit is a seating sensor that detects whether or not the occupant is seated has been described. However, the seating detection unit is not limited to this, and the seating detection unit may detect the occupant's seating. That's fine. Therefore, for example, a switch pressed by a seated occupant may be provided as the seating detection means.

  In each of the above embodiments, the case where the collision prediction unit is the collision prediction sensor 46 that detects the depression speed of the brake has been described. However, the collision prediction unit is not limited to this, and can detect a vehicle collision in advance. I just need it. For example, the collision prediction means may be composed of a vehicle speed sensor and a contact sensor, and the collision of the vehicle may be predicted by these sensors.

  In each of the above embodiments, the seat belt wearing assistance devices 20 and 50 are fixed to the surface of the seat back 4 on the side wall 5a side of the passenger compartment, but the seat belt wearing assistance devices 20 and 50 are fixed at this position. Not exclusively. For example, in the example shown in FIG. 9, the front surface 4b of the seat back 4 is provided with a recess 4c that extends downward from the shoulder 4a and accommodates the mounting auxiliary arms 21 and 51. A drive motor 23 and a gear 22 provided on the base end side of the mounting auxiliary arms 21 and 51 are accommodated in the seat back 4. And the mounting auxiliary arms 21 and 51 arrange | positioned in the storing position are accommodated in the recessed part 4c. On the other hand, when the mounting auxiliary arms 21 and 51 are moved to the auxiliary position, the mounting auxiliary arms 21 and 51 are rotated so as to exit from the recess 4c. With this configuration, the drive motor 23 and the gear 22 are accommodated in the seat back 4, and the mounting auxiliary arms 21 and 51 disposed at the retracted position are accommodated in the recess 4c. Can be better.

  Further, as shown in FIG. 10, the seat belt wearing assistance devices 20 and 50 may be disposed with the proximal ends of the wearing assistance arms 21 and 51 fixed to the side wall 5a of the vehicle compartment so as to be rotatable. In this case, the drive motor 23 and the gear 22 provided on the base end side of the mounting auxiliary arms 21 and 51 are disposed in the side wall 5a (between the outer panel and the inner panel of the vehicle).

  In each of the above-described embodiments, the seat belt wearing assistance devices 20 and 50 are configured such that the wearing assistance arms 21 and 51 rotate in the front-rear direction of the vehicle seat 1. What is necessary is just to be comprised so that the front-end | tip of the mounting | wearing auxiliary | assistance arm provided with 24 may be moved back and forth of the front surface 4b of the seat back 4. FIG. For example, in the example shown in FIG. 11, the mounting auxiliary arm 71 is arranged so that the longitudinal direction thereof corresponds to the front-rear direction of the vehicle seat 1. Then, the mounting assist arm 71 is moved in the front-rear direction of the vehicle seat 1 above the shoulder 4 a of the seat back 4. In the example shown in FIG. 12, the mounting auxiliary arm 81 is composed of arm members 81a and 81b that are rotatably connected to each other. When the mounting auxiliary arm 81 is moved to the auxiliary position, the arm member 81a is rotated to the front side of the vehicle seat 1 by the drive motor 23 (not shown in FIG. 12). Then, with the rotation of the arm member 81a, the arm member 81b connected to the tip of the arm member 81a is rotated to the front side of the vehicle seat 1. And the clamping part 24 provided in the front-end | tip of the arm member 81b is moved to the front side of the vehicle seat 1. FIG. Even if comprised in this way, the effect | action and effect similar to said each embodiment can be acquired.

  In each of the above embodiments, the gripping portion 24 is provided at the tip of the mounting auxiliary arms 21 and 51. However, when the mounting auxiliary arm is disposed at the mounting position, if the mounting auxiliary arm is disposed at a position ahead of the front surface 4b of the seat back 4, the gripping portion 24 is positioned at a position other than the tip (for example, the mounting auxiliary arm). You may provide in the longitudinal direction center part of a mounting auxiliary arm.

  In each of the above embodiments, the case where the seat belt wearing assistance devices 20 and 50 are provided corresponding to the rear seats has been described. However, the seat belt wearing assistance devices 20 and 50 are provided corresponding to the front seats of the vehicle. There may be.

The technical ideas that can be grasped from each of the above embodiments and each of the above modifications are described below.
(A) In the seat belt wearing assistance apparatus according to any one of claims 1 to 6, the control unit detects whether or not the seat belt is worn by the occupant. When the seat belt installation completion is detected, the first drive unit is driven to move the arm to the retracted position. If comprised in this way, since an arm is arrange | positioned in a retracted position based on that a passenger | crew mounted | worn the seatbelt, it will be suppressed that an arm disturbs the passenger | crew who seated on the vehicle seat. The occupant may not operate the switch to place the arm in the storage position. Accordingly, it is possible to reduce the burden on the occupant because the arm is disposed at the retracted position after the seat belt is mounted.

The perspective view which shows the seatbelt mounting assistance apparatus in a retracted position. The perspective view which shows the seatbelt mounting assistance apparatus in an auxiliary position. The side view of the vehicle seat provided with the seatbelt mounting assistance apparatus. The front view of the clamping part in a clamping release state. The front view of the clamping part in a clamping state. The block diagram which shows the electrical constitution of the seatbelt mounting auxiliary | assistance apparatus of 1st Embodiment. The block diagram which shows the electric constitution of the seatbelt mounting auxiliary | assistance apparatus of 2nd Embodiment. The perspective view of the seatbelt mounting assistance apparatus of 2nd Embodiment. The perspective view which shows the seatbelt mounting assistance apparatus of another form. The perspective view which shows the seatbelt mounting assistance apparatus of another form. The perspective view which shows the seatbelt mounting assistance apparatus of another form. The perspective view which shows the seatbelt mounting assistance apparatus of another form.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Vehicle seat, 2 ... Seat belt, 4 ... Seat back, 6 ... Webbing, 10 ... Seat belt winding device as a winding mechanism, 20, 50 ... Seat belt mounting auxiliary device, 21, 51, 71, 81 ... A mounting auxiliary arm as an arm, 23: a driving motor as a first driving unit, 24: a gripping unit, 25: a linear actuator as a second driving unit, 26: a control device as a control unit, 41: as a seating detection means , 46 ... a collision prediction sensor as a collision prediction means, 52 ... a second drive unit and a link mechanism as an interlocking mechanism.

Claims (6)

A seat belt wearing assistance device for pulling out a webbing provided to a seat belt to be worn by a passenger seated on a vehicle seat having a seat back and moving the webbing to the front side of the vehicle seat,
A gripping part provided on an arm driven by the first driving part, driven by the second driving part and gripping the webbing from both sides in the thickness direction of the webbing;
Controlling the first drive unit to move the arm between an auxiliary position in which the gripping part is forward of the seatback and a storage position in the rear of the auxiliary position; And a control unit that controls the second driving unit so that the webbing is pinched by the seat belt. In the seatbelt wearing auxiliary device according to claim 1,
The seat belt mounting assist device, wherein the second drive unit releases the webbing nipping by the nipping unit when the arm moves from the auxiliary position to the retracted position. In the seatbelt wearing auxiliary device according to claim 1 or 2,
The seat belt mounting assist device, wherein the second driving unit is an interlocking mechanism that is driven by the driving force of the first driving unit to drive the gripping unit. In the seatbelt wearing auxiliary device according to any one of claims 1 to 3,
When the arm is disposed at the retracted position, the control unit drives the second drive unit to allow the occupant to move the webbing and to wind the webbing. A seat belt wearing auxiliary device, wherein the webbing is pinched by the pinching portion so as to prohibit winding of the webbing by a mechanism. In the seatbelt wearing auxiliary device according to claim 4,
When the control unit determines that the vehicle collides based on a detection result of a collision prediction unit for predicting a vehicle collision, the control unit releases the seat belt by the grip unit. A seatbelt wearing auxiliary device that drives the second drive unit and controls the winding mechanism to wind up the webbing. In the seatbelt wearing auxiliary device according to any one of claims 1 to 5,
When the control unit determines that the occupant is not seated on the vehicle seat based on a detection result of a seating detection unit that detects whether the occupant is seated on the vehicle seat, A seatbelt wearing assist device, which is disposed at the storage position.

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