JP4713626B2 - Car with inner belt - Google Patents

Description

  The present invention has a seat cushion that can be rotated between a use position capable of supporting the buttocks of a seated occupant and a non-use position retracted from the use position, and the back of the seated occupant A seat back having a seat back that can be rotated between a use position that can support the seat and a non-use position in a posture that the seat cushion occupies forward in a state where the seat cushion occupies the non-use position; The present invention relates to an automobile including a buckle to which a tongue plate attached to an outer webbing that is hung on the body of an occupant seated on the seat is detachably connected and an inner belt having a base plate fixedly connected to the buckle.

  2. Description of the Related Art Conventionally, an automobile including a seat having a seat cushion and a seat back and a seat belt device for ensuring the safety of an occupant seated in the seat is well known (for example, see Patent Document 1). The seat belt device generally includes an inner belt having a buckle and an outer belt having a tongue plate and an outer webbing that are detachably connected to the buckle. One end of the outer webbing is locked to the vehicle body, and the other end is wound around the retractor. The outer webbing is hung on the occupant's body seated on the seat, the tongue plate slidably attached to the outer webbing is inserted into the buckle of the inner belt, and the tongue plate and the buckle are connected. It can be worn on the occupant's body.

  Further, in the automobile of the type described at the beginning, since the seat back of the seat can be brought down to the front non-use position, the space above the seat back brought to the non-use position is effectively used as a luggage storage space or the like. be able to. At that time, the conventional inner belt can be rotated between the use position when the tongue belt is inserted into the buckle and the inner belt is used, and the forward position where it falls forward from the use position. When the seat back is rotated to the non-use position, the inner belt is pressed by the seat back so that the inner belt can be brought down to the forward position. For this reason, the seat back can be rotated to the non-use position without being obstructed by the inner belt. In addition, when the seat back is returned from the non-use position to the use position, the inner belt is configured to automatically return to the use position by the spring force. Therefore, it is troublesome to manually return the inner belt to the use position. There is no need to perform any special operations.

  By the way, when the above-described inner belt is in the use position, the inner belt stops in a posture inclined toward the front. At that time, the use position of the inner belt is determined as follows.

  When the tongue plate is inserted into the buckle of the inner belt and the outer webbing is attached to the body of the occupant seated in the seat, the outer webbing fits the body of the most occupants, and the outer webbing gives the occupant excessive feeling of pressure. The position of the inner belt which is not given is determined as the use position.

  However, the occupant's body is quite different, and depending on the occupant's body shape, the outer webbing fits the occupant's body when the buckle of the inner belt is higher or lower than the use position. There is. When an occupant having such a body wears outer webbing, the occupant is unavoidable of a problem that the outer webbing is somewhat compressed.

JP-A-8-301070

  SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned conventional drawbacks, and when the occupant of any body type wears the outer webbing, the outer webbing is configured to fit the occupant's body. Is to provide.

  According to the present invention, in the automobile of the type described at the beginning, the inner belt includes a neutral position inclined toward the front, a forward-fall position that has fallen forward from the neutral position, and a backward movement backward from the neutral position. The base plate of the inner belt is rotatably supported with respect to the vehicle body so as to occupy the position, and the inner belt is moved with the seat back from the use position to the non-use position. When the seat back is pressed by the seat back and turned to the forward position, the seat back is turned to the neutral position by the spring force as the seat back is turned from the non-use position to the use position. When it is between the position and the retracted position, it is supported so that it can freely rotate without being biased by a spring, and is fixed to the floor panel that constitutes the floor surface of the vehicle body. And a second bracket fixed to the first bracket, and the base plate of the inner belt is supported to be fixed to the first bracket. A torsion coil spring is rotatably supported by the pin, wound around the support pin, and has one end engaged with the second bracket, and the inner belt is located between the neutral position and the retracted position. The other end of the torsion coil spring engages with the second bracket so that the spring force of the torsion coil spring does not act on the inner belt, and the inner belt is in the neutral position. The base plate of the inner belt comes into contact with the torsion coil spring engaged with the second bracket by its own weight, and the inner belt When the torsion coil spring is held in its neutral position and the inner belt is in a forward position relative to the neutral position, the torsion coil spring urges the inner belt to rotate toward the neutral position. The other end is separated from the second bracket and engages with the base plate of the inner belt, and the support pin penetrates the second bracket and is fixed to the second bracket. The second bracket, the support pin, the torsion coil spring, and the inner belt are configured as a unit assembled integrally.

  Further, in the above automobile, the base plate of the inner belt and the support pin are both made of metal, and the base plate is rotatably supported by the support pin via a resin bush fixed to the base plate. It is advantageous that the bush is formed with a protrusion that is in sliding contact with the second bracket when the bush and the inner belt rotate around the support pin.

  In the above automobile, the torsion coil spring is wound around the support pin via a collar fitted to the support pin, and the bush is sandwiched between the collar and the second bracket. It is advantageous to have.

  Further, in the above automobile, it is advantageous that the torsion coil spring is wound directly around the support pin, and the bush is sandwiched between a step portion formed on the support pin and the second bracket. It is.

  According to the present invention, when the inner belt can be rotated between the neutral position and the backward retracted position, the inner belt is between the neutral position and the retracted position. Because it can rotate freely without being biased by the spring, when an occupant of any body wears the outer webbing, the inner belt is located between the neutral position and the retracted position of the occupant's body. It occupies the position, and at this time, the spring force does not act on the outer webbing, so that the occupant does not feel a pressure.

  Hereinafter, embodiments of the present invention will be described, and conventional defects will be clarified more specifically with reference to the drawings.

  FIG. 1 is a perspective view showing a seat 1 arranged in a passenger compartment of an automobile. The seat 1 is used as a rear seat arranged at the rear part of the passenger compartment or a front seat arranged at the front part of the passenger compartment. The arrow Fr in the figure indicates the forward direction of the automobile, and the arrow W indicates the vehicle width direction. The terms “front” or “rear” in the present specification and claims mean before and after the forward direction Fr as a reference.

  The seat 1 shown in FIG. 1 has one seat cushion 2 and three seat backs 3, 3A, 3B, and the seat cushion portion 4 on the right side in the vehicle width direction when viewed in the vehicle forward direction Fr; An occupant can sit down on the seat cushion portion 4A at the center in the vehicle width direction and the seat cushion portion 4B on the left side in the vehicle width direction. Each seat back 3, 3A, 3B serves to support the back of an occupant seated on these seat cushion portions 4, 4A, 4B.

  The vehicle is provided with occupant seat belt devices 5, 5A, 5B seated on the respective seat cushion portions 4, 4A, 4B, and the occupant seat belt seated on the right seat cushion portion 4 is provided. The device 5 includes an outer belt 8 having an outer webbing 6, a tongue plate 7 slidably attached to the outer webbing 6, and an inner belt 10 having a buckle 9. Similarly, occupant seat belt devices 5A and 5B seated on the other seat cushion portions 4A and 4B have outer belts 8A and 8B and inner belts 10A and 10B, respectively, as shown in FIG. The three seat belt devices 5, 5A, 5B, the three seat backs 3, 3A, 3B, and the related components are all substantially the same, so that the passenger seated on the right seat cushion portion 4 is used. Only the seat belt device 5, the corresponding seat back 3, and the configuration related thereto will be described below.

  During normal use of the seat 1, the seat back 3 occupies the use position in the standing state as shown in FIG. 1, and the seat cushion 2 also occupies the substantially horizontal use position shown in FIG. When an occupant sits on the seat cushion 2, the seat cushion 2 supports the butt of the occupant, and the seat back 3 supports the back of the occupant.

  The outer webbing 6 of the seat belt device 5 shown in FIG. 1 is made of a flexible belt-like woven fabric, one end of which is locked to the vehicle body, and the other end is wound around a retractor (not shown). The outer webbing 6 can be pulled out from the retractor. Further, as will be described later, a base plate 23 (see FIG. 4) is fixedly connected to the buckle 9 of the inner belt 10, and the base plate 23 is connected to the floor panel 11 (see FIG. 2) constituting the floor surface of the vehicle body. It is rotatably supported.

  An outer webbing 6 is hung around the body of a passenger seated in the seat 1, and a tongue plate 7 slidably attached to the outer webbing 6 is attached to a tongue insertion hole (see FIGS. 5 and 5) formed in the buckle 9 of the inner belt 10. 7), the tongue plate 7 and the buckle 9 are connected to each other, and the outer webbing 6 is attached to the occupant's body. When a release button (see FIGS. 5 and 7) 13 provided on the buckle 9 is pressed, the connection between the tongue plate 7 and the buckle 9 is released, and the outer webbing 6 can be removed from the occupant's body. As described above, the automobile of the present example is fixedly connected to the buckle 9 to which the tongue plate 7 attached to the outer webbing 6 that is hung on the body of the passenger seated on the seat 1 is detachably connected, and to the buckle 9. The inner belt 10 including the base plate 23 is provided.

  FIG. 2 is a front view showing an outline of the support structure of the seat back 3. In this figure, illustration of each member such as the inner belt 10, the torsion coil spring, the second bracket, and the support pin described later is omitted (the same applies to FIG. 3). As shown in FIG. 2, the seat back 3 has a pair of concentric pivots 14 and 44 projecting from the seat back frame and is rotated around a pair of first brackets 15 and 25 fixed to the floor panel 11. It is supported movably. Thereby, the seat back 3 can be rotated around the axis of the pivots 14 and 44. On the other hand, the seat cushion 2 is also known in the direction of the arrows A and B between the use position shown in FIG. 3 (a) and the non-use position shown in FIG. 3 (b). The floor panel 11 is rotatably supported. In the illustrated example, the base end portion 17 of the rotating arm 16 is rotatably connected to the floor panel 11, and the distal end portion 18 of the rotating arm 16 is fixed to the cushion frame front portion of the seat cushion 2. The seat cushion 2 can be rotated between the use position shown in FIG. 3A and the non-use position shown in FIG. 3B while the rotation arm 16 is rotated. it can.

  Further, the seat cushion 2 is rotated in the direction indicated by the arrow A in FIG. 3A, and the seat cushion 2 is rotated to the non-use position shown in FIG. As shown by the arrow C in FIG. 3B, the seat back 3 is tilted forward around the axis of the pivot shafts 14 and 44 and rotated to the non-use position shown in FIG. Can be moved. In this state, the space above the seat back 3 can be used effectively as a storage space for luggage. Again, the seat back 3 is rotated in the direction shown by the arrow D in FIG. 3C to bring it to the use position shown in FIG. 3B, and then the seat cushion 2 is moved to the position shown in FIG. The seat cushion 2 can be returned to the use position shown in FIG. 3A by rotating in the direction indicated by the arrow B.

  As described above, the automobile of this example includes the seat cushion 2 that can be rotated between a use position capable of supporting the seated passenger's buttocks and a non-use position retracted from the use position. And a seat back 3 that can be rotated between a use position capable of supporting the back of a seated occupant and a non-use position in a posture in which the seat cushion 2 occupies the non-use position. The seat 1 which has this.

  As shown in FIG. 4 which is a partial cross-sectional view seen in the IV-IV line direction of FIG. 1, the first bracket 15 includes weld nuts 19 and 20 fixed to the floor panel 11 constituting the floor surface of the vehicle body. The bolts 21 and 22 are screwed onto the nuts 19 and 20 and fastened to the floor panel 11. The other first bracket 25 shown in FIG. 2 is similarly fixed to the floor panel 11.

  4 and 5, the inner belt 10 includes the buckle 9 and the base plate 23 fixedly connected to the buckle 9, as described above. The base plate 23 is made of a metal such as an iron plate. It can be made of a hard and highly rigid material such as a hard resin. Assume that the base plate 23 of this example is made of metal. As shown in FIG. 6, which is an enlarged sectional view taken along line VI-VI in FIG. 5, and FIG. 7, which is an exploded perspective view of the inner belt 10 and components directly related thereto, in the hole 50 formed in the base plate 23. The non-thread forming portion of the support pin 24 configured by a stepped bolt is fitted, and the base plate 23 is rotatably supported by the support pin 24.

  Although the base plate 23 may be directly supported by the support pins 24, in the illustrated example, the base plate 23 and the support pins 24 of the inner belt 10 are both made of metal. In order to prevent the generation of abnormal noise when rotating around, the support pin 24 is fitted with a resin bush 51 and the bush 51 is fitted into a hole 50 formed in the base plate 23. ing. Thereby, it is possible to prevent the generation of abnormal noise when the inner belt 10 rotates around the support pin 24. At that time, the bush 51 is fixed to the base plate 23 instead of the support pin 24. Thus, the base plate 23 is rotatably supported by the support pins 24 through the resin bushes 51 fixed to the base plate 23.

  Further, as shown in FIG. 5, the support pin 24 has a male thread portion that fits into a mounting hole 26 formed in one first bracket 15, and a nut 27 on the male thread portion of the support pin 24. Are screwed and tightened, whereby the support pin 24 is fixed to the first bracket 15. In this way, the inner belt 10 is shown by arrows E and F in FIG. 4 with respect to the first bracket 15 and eventually the vehicle body via the support pin 24 and the bush 51 fixed to the first bracket 15. It is supported so as to be able to rotate in a different direction.

  As shown in FIGS. 4 to 7, the support pin 24 described above passes through the second bracket 28, and a locking claw 29 of the second bracket 28 is formed on the first bracket 15. It fits into the locking hole 30 (FIG. 5). Thereby, it is prohibited that the second bracket 28 rotates with respect to the first bracket 15, and both the brackets 15 and 28 are fixed to each other. 5 to 7, the coil portion of the torsion coil spring 31 is wound around the non-thread forming portion of the support pin 24, and one end portion 52 of the torsion coil spring 31 is always The second bracket 28 is engaged with the spring locking protrusion 54 in a state of being pressed by the spring pressure of the spring 31. On the other hand, in the state shown in FIGS. 4 and 5, the other end 53 of the torsion coil spring 31 is pressed against the spring locking recess 55 formed in the second bracket 28 by the spring pressure of the spring 31. Engaged.

  In the example shown in FIGS. 6 and 7, a cylindrical collar 56 is fitted to the support pin 24, and the coil portion of the torsion coil spring 31 is wound around the collar 56. As described above, the torsion coil spring 31 is wound around the support pin 24 via the collar 56 fitted to the support pin 24, whereby the bush 51 is connected to one end face of the collar 56 and the second end surface. Between the brackets 28. The end surface of the collar 56 opposite to the bush 51 is in pressure contact with the flange 60 of the support pin 24, and the torsion coil spring 31 is held between the flange 60 and the bush 51.

  As shown in FIG. 8, the collar 56 shown in FIG. 6 is omitted, and instead, a step portion 57 is formed on the support pin 24 and the torsion coil spring 31 is wound directly around the support pin 24 so that the bush 51 is stepped. It can also be sandwiched between the portion 57 and the second bracket 28. Also in this case, the torsion coil spring 31 is held between the flange 60 of the support pin 24 and the bush 51.

  According to the configuration shown in FIG. 8, since the collar 56 shown in FIG. 6 can be omitted, the number of parts can be reduced. On the other hand, since it is necessary to form the step part 57 in the support pin 24, the shape of the support pin 24 becomes complicated. In this respect, the configuration shown in FIG. 6 is superior.

  Further, as shown in FIGS. 6 to 8, the second bracket 28 abuts on a stepped portion 58 formed on the support pin 24 and is firmly engaged with the threaded portion of the support pin 24. And is held between the locking ring 59 and the stepped portion 58. Thus, the support pin 24, the collar 56 fitted to the support pin 24, the torsion coil spring 31, the bush 51, the second bracket 28, the inner belt 10, and the locking ring 59 are configured as an integral unit 43. The support pin 24 passes through the second bracket 28 and is fixed to the second bracket 28, and the second bracket 28, the support pin 24, the torsion coil spring 31, and the inner belt 10 are It is configured as a unit 43 assembled integrally.

  As described above, the automobile of this example is fixed to the floor panel 11 constituting the floor of the vehicle body, and the first bracket 15 on which the seat back 3 is rotatably supported, and the first bracket 15. A base plate 23 of the inner belt 10 is rotatably supported by a support pin 24 fixed to the first bracket 15, and the automobile has a second bracket 28 fixed to the bracket 15. A torsion coil spring 31 is provided which is wound around the support pin 24 and engaged with one end 52 in pressure contact with the second bracket 28.

  As described above, the inner belt 10 is supported by the vehicle body via the support pins 24 and the like so as to be rotatable in the directions indicated by arrows E and F in FIG. 4 and FIG. 5 inclined toward the forward direction, the forward position shown in FIG. 9 that has fallen forward from the neutral position, and the retracted position shown in FIG. 10 behind the neutral position. The base plate 23 of the inner belt 10 is supported so as to be rotatable with respect to the vehicle body.

  When the inner belt 10 is in the neutral position shown in FIGS. 4 and 5, as described above, the other end 53 of the torsion coil spring 31 is in the spring locking recess 55 formed in the second bracket 28. Is engaged. In addition, when the inner belt 10 is in the neutral position, the base plate 23 of the inner belt 10 has the other weight of the torsion coil spring 31 engaged with the second bracket 28 by the weight of the inner belt 10 inclined forward. The inner belt 10 is held in its neutral position in contact with the end portion 53.

  With the inner belt 10 held in the neutral position shown in FIG. 4 as described above, the outer webbing 6 shown in FIG. 1 is hung around the body of the passenger seated on the seat, and the tongue plate 7 is attached to the buckle 9 of the inner belt 10. The seat belt device 5 is used as described above by connecting the buckle 9 and the tongue plate 7 to the tongue insertion hole 12 formed in the above. At this time, the inner belt 10 is located in a notch 33 formed in the seat cushion 2, as shown in FIG.

  On the other hand, the buckle 9 and the tongue plate 7 are detached and the seat back 2 is retracted to the non-use position as shown in FIG. When the inner belt 10 is moved, the inner belt 10 occupying the neutral position is pressed by the rotating seat back 3 and is tilted forward as indicated by an arrow E in FIG. Rotate until At this time, the first protrusion 61 formed on the base plate 23 hits the stopper 32 protruding from the second bracket 28, and the inner belt 10 stops at its forward position. In this way, as the seat back 3 tilts forward toward the non-use position, the inner belt 10 falls forward, so that the non-use position of the seat back 3 is not obstructed without being disturbed by the inner belt 10. Can be rotated.

  As described above, when the inner belt 10 starts to rotate from the neutral position toward the forward tilt position, the base plate 23 pressurizes the other end 53 of the torsion coil spring 31. Also at this time, one end 52 of the torsion coil spring 31 remains engaged with the spring locking projection 54 of the second bracket 28, so that the torsion coil spring 31 is deformed as shown in FIG. However, the other end 53 is separated from the spring locking recess 55 of the second bracket 28. The base plate 23 is engaged with the other end 53 of the torsion coil spring 31 in a state of being pressed by the spring pressure of the spring 31. As a result, the torsion coil spring 31 urges the base plate 23 of the inner belt 10 to rotate toward the neutral position as indicated by the arrow F in FIG. The other end 53 of the torsion coil spring is configured so that the torsion coil spring 31 urges the inner belt 10 to rotate toward the neutral position when the inner belt 10 is in the forward position relative to the neutral position. It engages in a state where it is separated from the second bracket 28 and is in pressure contact with the base plate 23 of the inner belt 10.

  Therefore, when the seat back 3 in the non-use position is rotated again in the direction shown by the arrow D in FIG. 3C and returned to the use position shown in FIG. By the urging action of 31, the inner belt 10 rotates around the support pin 24 in the direction indicated by the arrow F in FIG. 9, and is automatically returned to the neutral position shown in FIG. Thus, the torsion coil spring 31 serves to urge the inner belt 10 to rotate from the forward position to the neutral position.

  As described above, in the automobile of the present example, the inner belt 10 can be rotated between the neutral position and the forward-turned position that has fallen forward, and the seat back 3 is used for the inner belt 10. As the seat back 3 is rotated from the non-use position to the non-use position, the seat back 3 is pressed to turn to the above-mentioned forward position, and the seat back 3 is turned from the non-use position to the use position. Thus, the inner belt 10 is supported by the spring force so as to rotate to the neutral position.

  The inner belt 10 includes a high-rigid buckle 9 and a high-rigidity base plate 23 fixed to the buckle 9, and the base plate 23 is rotatably supported, so that the seat back 3 is not used from the use position. When the seat back 3 is rotated to the position, the inner back 10 is surely pressed by the seat back 3 and rotated to the forward position, and conversely, when the seat back 3 is rotated from the non-use position to the use position, The belt 10 can be reliably rotated to its neutral position by the spring force.

  On the other hand, when the inner belt 10 is rotated rearward from the neutral position shown in FIG. 4 as indicated by the arrow F, and the inner belt 10 is brought to the retracted position shown in FIG. The second protrusion 63 formed in the contact with the stopper 32 formed on the second bracket 28 causes the inner belt 10 to stop at its retracted position. Again, the inner belt 10 can be rotated to the front side indicated by arrow E in FIG. 10 to return the inner belt 10 to the neutral position shown in FIG. At this time, as described above, the base plate 23 of the inner belt 10 abuts against the other end 53 of the torsion coil spring 31 engaged with the spring locking recess 55 of the second bracket 28 by its own weight. In contact therewith, the inner belt 10 is held in its neutral position.

  As described above, when the inner belt 10 rotates between the neutral position shown in FIG. 4 and the retracted position shown in FIG. 10, the other end 53 of the torsion coil spring 31 is always the second bracket. 28 is engaged with the spring locking recess 55. At this time, one end 52 of the torsion coil spring 31 remains engaged with the spring locking protrusion 54 of the second bracket 28. As described above, since any of the end portions 52 and 53 of the torsion coil spring 31 is locked to the second bracket 28, the spring force of the torsion coil spring 31 does not act on the inner belt 10. When the inner belt 10 is between the neutral position and the retracted position, the other end portion 53 of the torsion coil spring 31 is caused by the spring force of the spring 31 so that the spring force of the torsion coil spring 31 does not act on the inner belt 10. The inner belt 10 is engaged with the second bracket 28 in a pressure contact state, and the inner belt 10 is supported so that it can freely rotate without being biased when it is between a neutral position and a retracted position. -ing

  According to the configuration described above, even when an occupant of any body type is seated on the seat 1, the tongue plate 7 is inserted into the buckle 9, and the outer webbing 6 is mounted around the occupant's body, the inner belt 10 It occupies a position between the neutral position and the retracted position according to the body shape. In addition, since no spring force acts on the inner belt 10 at this time, the occupant does not receive a feeling of pressure by the outer webbing 6.

  FIG. 11 is an explanatory diagram showing an outline of a conventional inner belt 10A. The inner belt 10A is rotatably supported between a use position indicated by a solid line in FIG. 11 and a forward position indicated by a two-dot chain line, and an inner belt is provided by a torsion coil spring (not shown). 10A is spring-biased toward the use position indicated by the solid line. Reference numeral 2A in FIG. 11 indicates a seat cushion, and reference numeral 3A indicates a seat back.

  The use position of the inner belt 10A shown in FIG. 11 is an intermediate position between the neutral position and the retracted position of the inner belt 10 of this example. Therefore, when the conventional inner belt 10A is in the use position, the buckle 9A is higher than the height of the buckle 9 when the inner belt 10 of this example occupies the neutral position. This is because when the tongue plate is inserted into the buckle 9A of the inner belt 10A and the outer webbing is attached to the occupant's body, the outer webbing is more likely to occupy the higher position of the buckle 9A of the inner belt 10A. This is because it fits the body of the occupant and rarely gives the occupant a feeling of pressure. However, as described above, depending on the occupant's body shape, the outer webbing of the inner belt 10A in the use position is lower or higher than that shown in FIG. There is a possibility that the body fits, and in such a case, there is a risk of giving the occupant a feeling of pressure.

  On the other hand, as described above, the inner belt 10 of the present example can freely rotate between its neutral position and the retracted position without receiving a spring force. There is no feeling of pressure on the passengers.

  Further, when the conventional inner belt 10A shown in FIG. 11 is in the use position, the height of the buckle 9A is high. Therefore, when the occupant sits down straddling the seat cushion and the buckle 9A, the buckle 9A May hit the occupant's buttocks and cause discomfort to the occupant.

    On the other hand, when the inner belt 10 of the present example is in the neutral position shown in FIG. 4, the height of the buckle 9 is relatively low, so that the occupant sits on his / her waist over the buckle 9 and the seat cushion. Even when lowered, the buckle 9 does not hit the occupant's buttocks strongly and does not cause discomfort to the occupant.

  By the way, as described above, the inner belt 10 rotates around the support pin 24. To enable such rotation, the bush 51 and the second bracket are used as shown in FIGS. A gap G needs to be formed between the gap 28 and the gap 28. However, if there is such a gap G, when the inner belt 10 rotates, there is a risk that this will rattle in the axial direction of the support pin 24. Therefore, the bush 51 is formed with a plurality of protrusions 64 that are in sliding contact with the second bracket 28 when the bush 51 and the inner belt 10 rotate around the support pin 24. Thereby, it can prevent that the inner belt 10 rattles.

  Further, as described above, the second bracket 28, the support pin 24, the torsion coil spring 31, and the inner belt 10 are configured as an integral unit 43. For this reason, when the seat is manufactured, the torsion coil spring 31 and related components are attached to the first bracket 15 simply by assembling the unit 43 to the first bracket 15 at the manufacturing factory. The seat 1 can be easily manufactured. If the torsion coil spring 31 is directly assembled to the support pin 24 in the seat production line without configuring the unit 43 and the torsion coil spring 31 is attached to the bracket 15, the torsion coil spring 31 is generally torsional. Since the work for assembling the coil spring 31 is a very fine work, a considerably long time is required for the work. For this reason, there exists a possibility that the smooth flow of the manufacturing line of a seat may be inhibited. On the other hand, in the automobile of this example, the unit 43 is constituted by the torsion coil spring 31 and related components, so that the unit 43 is manufactured in advance at a location outside the seat production line. The unit 43 can be assembled to the first bracket 15 in a short time in the seat production line. For this reason, the flow of the seat production line is not hindered.

  The seat manufactured as described above is assembled to the vehicle body in the final production line of the automobile. More specifically, the first brackets 15 and 25 of the seat 1 shown in FIG. 2 are fixed to the floor panel 11 by the weld nuts 19 and 20 and the bolts 21 and 22 shown in FIG. 1 is assembled to the car body.

  At that time, as shown in FIG. 4, if the inner belt 10 is supported by the first bracket 15 that supports the seat back 3, the inner belt 10 is obstructed and it is difficult to tighten the bolt 21. There is a risk. However, in the automobile of this example, as described above, the inner belt 10 can be rotated to the retracted position. Therefore, when the bolt 21 is tightened, the inner belt 10 is rotated to the retracted position shown in FIG. The bolt tightening impact wrench 65 can be inserted and the bolt 21 can be tightened, as indicated by the two-dot chain line in FIG. In this way, the bolt 21 can be easily tightened.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to this configuration.

It is a perspective view of the seat arrange | positioned in a vehicle interior. It is a schematic front view which shows the support structure of a seat back. It is a schematic explanatory drawing which shows the rotation state of a seat back and a seat cushion. It is the expanded partial sectional view seen in the IV-IV line direction of FIG. It is a perspective view which isolate | separates and shows a 1st bracket and a unit. FIG. 6 is an enlarged sectional view taken along line VI-VI in FIG. 5. It is a disassembled perspective view of a unit. It is sectional drawing similar to FIG. 6 which shows the example which does not provide a color | collar. FIG. 5 is a view similar to FIG. 4, showing a state when the seat back is rotated to the non-use position, and the inner belt is pressed by the seat back and rotated to the forward position. It is a figure similar to FIG. 4 which shows a mode when an inner belt has occupied the retreat position. It is a schematic explanatory drawing which shows the conventional inner belt.

Explanation of symbols

1 seat 2 seat cushion 3, 3A, 3B seat back 6 outer webbing 7 tongue plate 9 buckle 10 inner belt 11 floor panel 15 first bracket 23 base plate 24 support pin 28 second bracket 31 torsion coil spring 43 unit 51 bush 52 One end portion 53 The other end portion 56 Color 57 Step portion 64 Projection

Claims (4)

It has a seat cushion that can be rotated between a use position that can support the buttocks of a seated occupant and a non-use position that is retracted from the use position, and can support the back of the seated occupant A seat having a seat back that can be pivoted between a usable position and a non-use position in a posture in which the seat cushion occupies the non-use position, and seated on the seat In an automobile comprising a buckle to which a tongue plate attached to an outer webbing that is hung around the occupant's body is detachably connected and an inner belt having a base plate fixedly connected to the buckle, the inner belt comprises: To occupy a neutral position inclined toward the front, a forward position that has fallen forward from the neutral position, and a backward position that is behind the neutral position The base plate of the inner belt is rotatably supported with respect to the vehicle body, and the inner belt is pressed against the seat back as the seat back rotates from the use position to the non-use position. As the seat back is rotated from the non-use position to the use position, it is turned to the neutral position by a spring force, and the neutral position and the retracted position are When it is in between, it is supported so that it can rotate freely without being biased by a spring, and it is fixed to the floor panel that constitutes the floor of the vehicle body, and the seat back is supported rotatably A first bracket and a second bracket fixed to the first bracket, and the base plate of the inner belt is rotated around a support pin fixed to the first bracket. A torsion coil spring is provided which is supported in such a manner as to be wound around the support pin and has one end engaged with the second bracket, and the inner belt is between a neutral position and a retracted position; The other end of the torsion coil spring is engaged with the second bracket so that the spring force of the torsion coil spring does not act on the inner belt, and when the inner belt is in the neutral position, the inner belt The base plate is brought into contact with the torsion coil spring engaged with the second bracket by the weight of the inner belt, and the inner belt is held in the neutral position. The inner belt is more forward than the neutral position. The other end of the torsion coil spring so that the torsion coil spring urges the inner belt to rotate toward its neutral position. The portion is separated from the second bracket and engages with the base plate of the inner belt, and the support pin penetrates the second bracket and is fixed to the second bracket. The automobile, wherein the second bracket, the support pin, the torsion coil spring, and the inner belt are configured as an integrally assembled unit. Both the base plate and the support pin of the inner belt are made of metal, and the base plate is rotatably supported by the support pin through a resin bush fixed to the base plate. 2. The automobile according to claim 1, wherein a protrusion that slides on the second bracket is formed when the bush and the inner belt rotate around the support pin. The torsion coil spring is wound around the support pin via a collar fitted to the support pin, and the bush is sandwiched between the collar and the second bracket. Car. The automobile according to claim 2, wherein the torsion coil spring is wound directly around the support pin, and the bush is sandwiched between a step formed on the support pin and the second bracket.

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