JP4525432B2 - Reinforcing structure and reinforcing method for vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat reinforcing structure and a reinforcing method for securing the strength of a seat by supporting an excessive forward load input to a seat back on the vehicle body side.

  Conventionally, there are two types of seat belts provided on a vehicle seat, one whose support point (anchor point) is set on the vehicle body side and one on the seat side. The latter is called a belt-in seat. Thus, even when the front / rear position of the seat is adjusted by the slide adjustment mechanism, the seat belt tightening adjustment position is prevented from changing.

  However, in the belt-in seat, for example, a shoulder belt such as a three-point seat belt is provided, and the upper end of the shoulder belt is supported by the upper part of the side surface of the seat back. When a force is applied, the inertial force (forward load) is input to the upper part of the seat back via the seat belt, so that the strength of the seat back itself as well as the connecting portion of the seat back and the seat cushion and the seat It is necessary to greatly increase the strength of the connecting portion between the cushion and the vehicle floor.

For this reason, a long stay extending rearward and upward of the vehicle is attached to the upper part of the seat back, and the stay is connected to a receiving member provided on the upper part of the center pillar via an emergency lock mechanism. It is known that the seat can be reinforced without excessively increasing the strength of the seat itself by supporting the excessive inertial force to the center pillar side, that is, the vehicle body side via the stay (for example, patents) Reference 1).
Japanese Patent Laid-Open No. 5-16716 (page 3, FIG. 1)

  However, in such a conventional vehicle seat reinforcing structure, the stay is a connecting member that supports the seat back to the vehicle body side, and this stay protrudes from the upper part of the seat back toward the rear and upward of the vehicle. At the rear end, it is necessary to project the adjustment stroke of the front / rear slide of the seat to the rear of the vehicle relative to the receiving member, so the stay protrudes greatly from the upper part of the seat back toward the rear and upward of the vehicle. There is a risk that the occupant's ease of getting on and off and the appearance of the room may be impaired.

  Therefore, by providing a connecting member between the seat back and the side surface of the passenger compartment facing the side of the seat back, the connecting member can be prevented from protruding rearward from the seat back.

  However, when the side surface portion of the passenger compartment facing the side surface of the seat back is a door, the connecting member is provided between the seat back and the inner side surface of the door, which may hinder the opening and closing operation of the door. .

  Accordingly, an object of the present invention is to provide a vehicle seat reinforcing structure and a reinforcing method capable of supporting a front load input to a seat back by a door without hindering the door opening / closing operation. .

  The vehicle seat reinforcement structure of the present invention is provided with connecting means for transmitting the vehicle front load acting on the seat back to the vehicle body side, with the vehicle lateral direction outer side surface of the seat back facing the door. The connecting means includes an engaging member provided on one of the seat back and the door, and an engaged member provided on the other of the seat back and the door and engaged with the engaging member. The main feature is that an engagement releasing means for releasing the engagement between the engaging member and the engaged member by opening the door is provided between the engaging member and the engaged member.

  Further, the vehicle seat reinforcing method of the present invention includes an engagement member provided on one of the seat back or a door facing the vehicle lateral direction outer side surface thereof, and an engaged member provided on the other of the seat back or the door. A vehicle front load acting on the seat back by engaging the member is transmitted to the door side, and when the door is opened, the engagement between the engaging member and the engaged member is released. .

  According to the vehicle seat reinforcing structure and the reinforcing method of the present invention, even when the side surface of the seat back faces the door, the engagement member provided on one of the seat back or the door, and the seat back or the door By engaging the engaged member provided on the other side and transmitting the vehicle front load acting on the seat back to the door side, the vehicle front load acting on the seat back is supported on the vehicle body side via the door it can.

  For this reason, the strength of the seat can be secured without applying an excessive reinforcing structure to the seat, and the connecting member including the engaging member and the engaged member is disposed between the seat back and the door. Therefore, the connecting member does not hinder the rear seat occupant, and it can be avoided that the indoor appearance is hindered.

  Further, since the engagement member and the engaged member are disengaged from each other when the door is opened, the door can be freely opened without hindering the opening / closing operation.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIGS. 1 to 6 show a first embodiment of a vehicle seat reinforcing structure according to the present invention, FIG. 1 is a perspective view of a seat and a door as viewed from the front of the room, and FIG. 2 is an attachment of a shoulder anchor and an engaging member. FIG. 3 is an exploded perspective view of the engaging member, and FIG. 4 is an enlarged sectional view taken along the line AA in FIG.

  FIG. 5 is a sectional view showing the disengagement behavior of the engaging member and the engaged member at the time of opening the door in order from (a) to (c), and FIG. 6 is the vehicle front load input to the seat back. It is sectional drawing which shows the behavior of the engaging member at the time of doing in order to (a), (b).

  The vehicle seat reinforcing structure of the present embodiment is shown as an example applied to the front seat. As shown in FIG. 1, the seat 1 includes a seat cushion 2 installed on the vehicle body floor Bf, and the seat cushion 2. The seat back 3 is connected to the rear end portion of the rear end portion via a reclining device, and the seat 1 constitutes a belt-in seat in which the seat belt device 4 is incorporated.

  The seat belt device 4 constitutes a three-point seat belt comprising a shoulder belt 4a and a lap belt 4b, and the upper end of the shoulder belt 4a is inserted into the upper part of the seat back 3 in the vehicle width direction, as shown in FIG. As shown, it is folded back by a shoulder anchor 4c coupled to the upper end of the seat back frame 3a and guided downward, and its leading end is wound around a seat belt retractor (not shown).

  As shown in FIG. 1, the lower end portion of the shoulder belt 4a is inserted into the tongue 4d and is connected to the lap belt 4b. The front end portion of the lap belt 4b is provided on the outer side in the vehicle width direction of the seat cushion 2. The tongue 4d is detachably locked to an inner buckle 4e provided on the inner side of the seat cushion in the vehicle width direction.

  Therefore, when an unillustrated occupant seated on the seat 1 wears the seat belt device 4 and the vehicle collides with the front, inertial force acting on the occupant to the front of the vehicle acts on the seat belt device 4 via the seat belt device 4. 1, an excessive load to the front of the vehicle acts on the upper portion of the seat back 3 that supports the upper end of the shoulder belt 4a.

  A front door 5 is positioned on the outside of the seat 1 in the vehicle width direction (left side in FIG. 1). It faces the inner surface 5a.

  Here, the reinforcing structure of the seat 1 of the present embodiment is provided with connecting means 6 for transmitting a vehicle front load acting on the seat back 3 to the vehicle body side via the seat belt device 4. The connecting means 6 includes an engagement member 10 provided on the outer side surface 3b in the vehicle width direction of the seat back 3, and an engaged member 20 provided on the inner side surface 5a of the door 5 and engaged with the engagement member 10. In addition, an engagement releasing means 30 for releasing the engagement between the engaging member 10 and the engaged member 20 by opening the door 5 is provided between the engaging member 10 and the engaged member 20. It is provided.

  In addition, the method for reinforcing the seat 1 according to the present embodiment includes the engagement member 10 provided on one of the seat back 3 or the door 5 facing the vehicle lateral direction outer side surface, and the other of the seat back 3 or the door 5. The provided engaged member 20 is engaged to transmit a vehicle front load acting on the seat back 3 to the door 5 side, and when the door 5 is opened, the engaging member 10 and the engaged member 20 are transmitted. The engagement with is released.

  As shown in FIG. 2, the engaging member 10 is attached to a side surface facing the door 5 of the seat back frame 3a disposed in the vertical direction on the outer side of the seat back 3 in the vehicle width direction. An engaging claw 11 for engaging with the combined member 20 is provided.

  As shown in FIG. 3, the engagement claw 11 includes a first engagement claw 11A having a long dimension L1 and a second engagement claw 11B having a short dimension L2, which are arranged in parallel with each other. It is rotatably attached to the base 13 via the attachment pins 12 with the flanges 12a inserted through the formed attachment holes 11Aa and 11Ba.

  The base 13 includes a pair of upper and lower horizontal walls 13b1 and 13b2 erected from both sides of a rectangular substrate 13a, and is formed in a substantially U-shaped cross section. The base 13 and the engaging claw 11 are shown in FIGS. As shown in FIG. 4, both ends are accommodated in a cylindrical casing 14 closed by end plates 14a and 14b.

  As shown in FIG. 4, the base 13 and the casing 14 are formed by passing a tubular bolt 15 with a flange 15a from the seat back frame 3a to the center portion of the substrate 13a and the end plate 14b inside the vehicle. It is fixed to the seat back frame 3a by tightening a nut 15b at the tip.

  In the state where the base 13 is fixed to the seat back frame 3a, the longitudinal direction of the substrate 13a is arranged in the vehicle front-rear direction, and the lateral walls 13b1 and 13b2 protrude outward in the vehicle width direction. The first and second engaging claws 11A and 11B are inserted by inserting the mounting pin 12 through a longitudinal hole 13c formed in the vehicle front side end portion (lower end portion in FIG. 4) of the lateral walls 13b1 and 13b2. , And can be rotated around the mounting pin 12 and can be moved back and forth within the elongated hole 13c.

  The mounting pin 12 passes through the elongated hole 13c and the mounting holes 11Aa and 11Ba of the first and second engaging claws 11A and 11B, and then a bolt 12b is fastened and fixed to the opposite end of the flange 12a. The

  Further, the pair of U-shaped springs 16 disposed on the outer sides of the pair of lateral walls 13b1 and 13b2 in a direction in which the first and second engaging claws 11A and 11B are engaged with the engaged member 20, respectively. The mounting pin 12 is pressed and urged forward in the elongated hole 13c while being urged to rotate.

  That is, the U-shaped spring 16 has semicircular arc-shaped locking portions 16a and 16b formed at both ends, and a pair of bent portions bent into a U-shape are provided with respective bent portions. First and second coil winding portions 16c and 16d that are urged in the expanding direction are formed.

  And one latching | locking part 16a of a pair of U-shaped spring 16 is made into latching protrusion 11Ab and 11Bb which protruded in the outer surface of the length direction substantially center part of 1st, 2nd engagement nail | claw 11A, 11B. In addition to locking, the other locking portion 16b is locked to a locking projection 13d protruding from the outer surface of the substantially central portion in the front-rear direction of the lateral walls 13b1 and 13b2.

  Further, the first coil winding portion 16c of each U-shaped spring 16 is inserted into the mounting pin 12, and the second coil winding portion 16d is protruded from the vehicle front outer side of the lateral walls 13b1 and 13b2. It is attached to.

  Accordingly, the mounting pin 12 is pressed and urged toward the front of the vehicle in the elongated hole 13c by the urging force of the second coil winding portion 16d, and the first and second portions that lock the one locking portion 16a. The engaging claws 11 </ b> A and 11 </ b> B are urged to rotate outwardly of the vehicle around the mounting pin 12 by the urging force of the first coil winding portion 16 c.

  Further, at the rear end of the vehicle, which is the free end of the first and second engaging claws 11A and 11B, the flanges 11Ac and 11Bc that protrude outward from the vehicle and substantially engage the engaged member 20 are provided. Is formed. And these collar parts 11Ac and 11Bc are projected and retracted outward from the opening part 14c formed in the end plate 14a outside the vehicle of the casing 14 as shown in FIG.

  As shown in FIG. 1, the engaged member 20 is formed in a substantially triangular flat plate shape that is tapered toward the front of the vehicle, and the engaged member 20 is connected to the inner surface 5 a of the door 5. It is attached to a portion facing the joint member 10.

  As shown in FIG. 4, a plurality of vertical grooves 21 are formed in the engaged member 20 in a lattice shape in the vehicle front-rear direction with a constant pitch p, and the first and second grooves 21 are formed in one of the vertical grooves 21. One of the engaging claws 11A and 11B enters and is engaged.

  That is, the vertical groove 21 is formed between a plurality of vertical ribs 23 projecting from the substrate 22 with the pitch p as shown in FIG. 4, and the flanges of the first and second engaging claws 11A and 11B are formed. 11Ac and 11Bc are locked to the vehicle rear surface of the vertical rib 23.

  At this time, since the lengths L1 and L2 of the first and second engaging claws 11A and 11B are different, the formation positions of the flange portions 11Ac and 11Bc formed at the respective tip portions are different. 11Bc is separated by a half pitch of the pitch p in the vehicle longitudinal direction.

  Accordingly, since either one of the flanges 11Ac and 11Bc enters the longitudinal groove 21, the door 5 is closed and biased outwardly by the U-shaped spring 16 when the door 5 is closed. Either one of the first and second engaging claws 11A and 11B is engaged with the engaged member 20, and one of the flange portions 11Ac and 11Bc separated by a half pitch in this way is the longitudinal groove 21. Since the engagement member 10 and the engaged member 20 are engaged, the relative position interval in the vehicle front-rear direction can be shortened.

  By the way, in the present embodiment, the longitudinal ribs 23 are generally inclined at the front end side toward the rear of the vehicle, and accordingly, the front surface of the vehicle that serves as the locking surface of the flanges 11Ac and 11Bc is also in the same direction. Inclined to.

  The disengaging means 30 is shown in FIG. 5B between the engaging portions of the engaging member 10 and the engaged member 20, that is, between the flanges 11Ac and 11Bc engaged with each other and the vertical ribs 23. As shown in the figure, when the load F in the door opening direction is applied, the first claw mechanism 31 moves the engaging claw 11 that is the engaging portion of the engaging member 10 by pushing it away in the disengaging direction by the vertical ribs 23. It is configured.

  The first idling mechanism 31 includes the elongated hole 13c that supports the mounting pins 12 of the first and second engaging claws 11A and 11B so as to be movable back and forth, and the U-shape that presses and biases the mounting pins 12 forward of the vehicle. And a spring 16.

  That is, the first idling mechanism 31 moves from the closed state of the door 5 shown in FIG. 5A to the door opening direction between the engaging member 10 and the engaged member 20 as shown in FIG. When the load F acts, the vertical rib 23 of the engaged member 20 presses the flanges 11Ac and 11Bc of the first engaging claw 11A or the second engaging claw 11B engaged with the vertical rib 23 toward the rear of the vehicle. As a result, the first and second engaging claws 11A and 11B are configured so that the mounting pin 12 moves in the elongated hole 13c against the urging force of the U-shaped spring 16 as shown in FIG. In order to escape backward, the vertical ribs 23 can be disengaged while pushing the flanges 11Ac and 11Bc backward.

  As shown in FIGS. 5B and 5C, the door 5 is opened and closed around the door hinge Dh, and the load F in the door opening direction is the direction in which the engaging claws 11A and 11B are engaged with the vertical ribs 23. Is substantially perpendicular to the direction.

  Further, in the present embodiment, the connecting means 6 has a sheet collision caused by a frontal collision between the engaging portion of the engaging member 10 and the engaged member 20, that is, the engaging portion of the engaging claw 11 and the vertical rib 23. There is provided a release preventing means 40 for preventing the engagement claw 11 as the engagement portion of the engagement member 10 from moving in the engagement release direction when an excessive load is applied to move the back 3 forward of the vehicle. is there.

  In other words, the release preventing means 40 is configured such that the engagement claw 11 that is the engagement portion of the engagement member 10 is relative to the seat back 3 (seat back frame 3a) by a load that moves the seat back 3 forward of the vehicle. And a stopper locking mechanism 41 that locks the vehicle inner side surfaces 11Ad and 11Bd on the engagement claw 11 on the engagement release preventing side with the stoppers 41A and 41B.

  As shown in FIG. 3, the stoppers 41A and 41B extend lateral walls 13b1 and 13b2 of the base 13 to the rear of the vehicle, and are provided at the outer ends of rear side walls 13b1 'and 13b2' that are erected on the rear side of the substrate 13a. It is formed.

  The rear side walls 13b1 'and 13b2' are formed so that their projecting heights correspond to the positions of the vehicle inner side surfaces 11Ad and 11Bd of the first and second engaging claws 11A and 11B, respectively. The corresponding rear side wall 13b1 'and the rear side wall 13b2' corresponding to the second engagement claw 11B are shifted in the vehicle front-rear direction by the difference d between the lengths of the engagement claws 11A and 11B.

  Of course, the rear side walls 13b1 'and 13b2' are provided when the mounting pins 12 of the first and second engaging claws 11A and 11B are in the vehicle front position by the biasing force of the U-shaped spring 16, as shown in FIG. The first engaging claw 11A can enter the inside of one rear side wall 13b1 ', and the second engaging claw 11B can enter the inside of the other rear side wall 13b2'.

  By the way, as described above, the base 13 and the casing 14 of the engaging member 10 are fixed to the seat back frame 3a via the tubular bolt 15 and the nut 15b. As shown in FIGS. 15 is inserted with an engagement release wire 50 for maintaining the engagement release state of the first and second engagement claws 11A and 11B.

  A locking rod 51 is provided at the distal end of the disengagement wire 50, while the opposed surfaces 11Ae and 11Be of the first and second engaging claws 11A and 11B are substantially at the center in the vehicle front-rear direction. Semi-arc-shaped seating surfaces 52A and 52B for locking half of the locking rod 51, and semicircular recesses 53A and 53B for inserting the engagement release wire 50 into the center thereof are formed.

  And the front-end | tip part of the engagement cancellation | release wire 50 is penetrated to the said semicircle recessed part 53A, 53B of 1st, 2nd engagement nail | claw 11A, 11B, and the latching hook 51 is either one of said seat surface 52A, 52B. That is, of the first and second engaging claws 11A and 11B, the outer claw is turned to the outside of the vehicle and is locked to the seating surfaces 52A and 52B engaged with the engaged member 20, and in this state. The engagement state can be released by pulling the engagement release wire 50.

  With the above configuration, according to the vehicle seat reinforcing structure and the reinforcing method of the present embodiment, when the door 5 is closed, the first and second engaging claws 11A and 11B of the engaging member 10 provided on the seat back 3 are provided. Since one of the two engages with the vertical rib 23 of the engaged member 20 provided on the inner side surface 5a of the door 5, the seat belt device may be caused by a frontal collision or the like even when the side surface of the seat back 3 faces the door 5. The vehicle front load acting on the seat back 3 via 4 can be transmitted to the door 5 via the connecting means 6 including the engaging member 10 and the engaged member 20.

  Therefore, since the vehicle front load acting on the seat back 3 can be supported on the vehicle body side via the door 5 in this way, the strength of the seat 1 can be ensured without applying an excessive reinforcing structure to the seat 1, Further, since the connecting member 6 is disposed between the seat back 3 and the door 5, the connecting member 6 does not hinder the rear seat occupant, and it also hinders the appearance of the room. can avoid.

  Further, as shown in FIGS. 5A to 5C, the engaging member 10 and the engaged member 20 are disengaged by the disengaging means 30 when the door 5 is opened. Therefore, the door 5 can be freely opened without hindering the opening / closing operation of the door 5.

  Furthermore, in the present embodiment, the engagement release means 30 is used to engage the engagement portion of the engagement member 10 when a load F in the door opening direction is applied to the engagement portion of the engagement member 10 and the engaged member 20. Since the first claw mechanism 31 that moves the engaging claw 11 in the disengagement direction by the vertical rib 23 that is the engaged member is used, without requiring an extra operation when the door is opened, The engagement between the engaging member 10 and the engaged member 20 can be automatically and smoothly released.

  Furthermore, as shown in FIGS. 6A and 6B, a load that moves the seat back 3 forward of the vehicle acts on the connecting means 6 at the engaging portion between the engaging member 10 and the engaged member 20. Since the release preventing means 40 for preventing the engagement claw 11 of the engagement member 10 from moving in the engagement release direction is provided, the engagement member 10 and the engaged member 20 are engaged with each other. More reliably, the seat back 3 can be prevented from moving forward together with the occupant.

  Further, the release blocking means 40 moves the engagement claw 11 of the engagement member 10 relative to the seat back 3 by a load that moves the seat back 3 forward of the vehicle, and the vehicle of the engagement claw 11 Since the stoppers 41A and 41B are configured as stopper stoppers 41 that lock the inner surfaces 11Ad and 11Bd with the stoppers 41A and 41B, the stoppers 41A and 41B can reliably prevent the engagement claw 11 from being disengaged with a simple structure. it can.

  7 and 8 show a second embodiment of the present invention, in which the same components as those in the second embodiment are denoted by the same reference numerals and redundant description is omitted, and FIG. FIG. 8 is an explanatory view showing the operation of the engaging member and the engaged member in (a) to (c), respectively.

  The vehicle seat reinforcement structure of the present embodiment is basically the same as the reinforcement structure of the first embodiment, and as shown in FIG. 8, the connecting means 6 is composed of an engaging member 10A and an engaged member 20A. In addition, an engagement releasing means 30 is provided between the engaging member 10A and the engaged member 20A to release the engagement between the engaging member 10A and the engaged member 20A by opening the door 5. .

  The engaging member 10 </ b> A includes the engaging claws 11, and the engaged member 20 </ b> A includes a plurality of vertical grooves 21 formed in a lattice shape, and the engaging claws 11 are formed in the vertical ribs 23 between the vertical grooves 21. Engageable.

  Here, this embodiment is mainly different from the first embodiment in that the engaged member 20A, the lattice-like member 60 in which a plurality of longitudinal grooves 21 are formed in a lattice shape, and the lattice as shown in FIG. A pair of guide plates 61 disposed on both upper and lower sides of the member 60, and the lattice member 60 is attached between the guide plates 61 so as to be movable back and forth.

  The lattice-like member 60 has a pair of guide surfaces 60a that are substantially perpendicular to the door inner surface 5a at both upper and lower ends.

  The pair of guide plates 61 are formed of angle members having an L-shaped cross section, and the guide plates 61 are coupled to the door inner surface 5a with bolts 62 as shown in FIG. In addition, the guide surface 60a of the lattice member 60 is disposed between the support surfaces 61a of the upper and lower guide plates 61 so as to be relatively movable.

  On the other hand, a plurality of long holes 63 extending in the vehicle front-rear direction are formed in the support surface 61 a of the guide plate 61 at predetermined intervals in the front-rear direction, and the long holes 63 are formed in the guide surface 60 a of the lattice member 60. A pin insertion hole 60b is formed corresponding to each of the support pins 64, and a support pin 64 having a flange 64a formed at one end is inserted into the elongated hole 63 and the pin insertion hole 60b, and a bolt 64b is fastened and fixed to the lower end thereof. Thus, the lattice member 60 is attached between the pair of guide plates 61 so as to be movable back and forth.

  That is, the lattice member 60 is integrated with the support pins 64, and the support pins 64 move in the elongated holes 63 of the guide plate 61, thereby allowing the lattice member 60 to move back and forth.

  Further, the lattice member 60 is pulled toward the rear of the vehicle by a spring 70 stretched between the rear end and the inner side surface of the door. In a normal state, the support pins 64 are provided as shown in FIG. It is located at the vehicle rear end of the long hole 63.

  When the door 5 is opened, if the load F in the door opening direction is applied between the engaging claws 11 and the vertical ribs 23 as shown in FIG. 8B, the lattice member 60 is biased by the spring 70. Against this, the support pin 64 moves in the elongated hole 63 so that the engagement can be released while escaping to the front of the vehicle.

  Therefore, in the present embodiment, the grid member 60 is arranged to be movable back and forth by the elongated holes 63, and the grid member 60 is pulled and urged rearward by the spring 70 to constitute the second idling mechanism 65. The second idling mechanism 65 is used as the disengaging means 30.

  In the present embodiment, the engaging claw 11 does not need to be moved back and forth with respect to the seat back 3, and is attached so as to be able to turn in and out of the vehicle, and the outside of the vehicle, that is, the lattice-like member 60 by a spring not shown. It is urged to rotate in a direction to engage with.

  In addition, an inclined hole 66 is formed at the front end portion of the elongated hole 63 so as to be inclined forward and inward of the vehicle, and a width is formed at a boundary portion between the elongated hole 63 and the inclined hole 66. A narrow notch 67 is projected.

  Therefore, when an excessive load is applied to the seat back 3 through the seat belt device 4 due to a frontal collision, the engaging claw 11 moves to the front of the vehicle together with the seat back 3 as shown in FIG. The lattice member 60 engaged with the engaging claw 11 moves to the front of the vehicle.

  Then, the support pin 64 that moves together with the grid member 60 enters the inclined hole 66 while crushing the notch 67 due to an excessive load that is input, and the grid member 60 is engaged with the engagement claws 11, that is, inward of the vehicle. The engagement promoting mechanism 68 is configured by providing the inclined hole 66 and the notch 67, and the engagement promoting mechanism 68 is used as the release preventing means 40.

  With the above-described structure for reinforcing a vehicle seat according to this embodiment, the vehicle front load acting on the seat back 3 can be supported on the vehicle body side via the door 5 as in the first embodiment. The strength of the seat 1 can be ensured without applying an excessive reinforcement structure, and the connecting member 6 is disposed between the seat back 3 and the door 5, so that the connecting member 6 is used by the rear seat occupant. There will be no hindrance, and the appearance of the room will not be hindered.

  Further, in the present embodiment, the disengaging means 30 is a second idling mechanism in which the lattice member 60 is arranged so as to be movable back and forth through the elongated holes 63 and the lattice member 60 is pulled and urged rearward by the spring 70. 65, the door 5 can be freely opened without hindering the opening and closing operation of the door 5, and the second idling mechanism 65 requires an extra operation when the door is opened. In addition, the engagement between the engaging member 10A and the engaged member 20A can be automatically released smoothly.

  Furthermore, since the release preventing means 40 is the engagement promoting mechanism 68 configured by providing the elongated hole 63 with the inclined hole 66 and the notch 67, when an excessive load in front of the vehicle acts on the seat back 3, the lattice-like member 60 can be further moved in the direction of engagement with the engagement claw 11 to further ensure the engagement, and the engagement claw 11 can be reliably prevented from being released with a simple structure.

  By the way, the present invention has been described by taking the first and second embodiments as examples. However, the present invention is not limited to these embodiments, and various other embodiments can be adopted without departing from the gist of the present invention. For example, the engagement members 20 and 20A can be provided on the seat back 3 side and the engagement members 10 and 10A can be provided on the door 5 side by reversing the attachment side of the engagement member and the engagement member.

It is the perspective view which looked at the sheet | seat and the door from the indoor front in 1st Embodiment of this invention. It is a perspective view of the seat back frame which attached the shoulder anchor and the engagement member in 1st Embodiment of this invention. It is a disassembled perspective view of the engaging member in 1st Embodiment of this invention. It is an expanded sectional view along the AA line in FIG. It is sectional drawing which shows order for the behavior at the time of the engagement cancellation | release of the engaging member and to-be-engaged member at the time of door rotation in 1st Embodiment of this invention to (a)-(c) later on. It is sectional drawing which shows order for the behavior of an engaging member when the vehicle front load is input into the seat back in 1st Embodiment of this invention in order to (a), (b). It is a disassembled perspective view of the to-be-engaged member in 2nd Embodiment of this invention. It is explanatory drawing which shows the operation | movement of an engaging member and a to-be-engaged member in 2nd Embodiment of this invention, respectively to (a)-(c).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seat 2 Seat cushion 3 Seat back 4 Seat belt apparatus 5 Door 6 Connection means 10, 10A Engagement member 11 Engagement claw (engagement part)
20, 20A Engagement member 30 Disengagement means 31 First idling mechanism 40 Release prevention means 41A, 41B Stopper 41 Stopper locking mechanism 60 Grid member 65 Second idling mechanism 68 Engagement promotion mechanism

Claims (8)

In the vehicle seat reinforcing structure in which the vehicle lateral direction outer side surface of the seat back is opposed to the door, and the vehicle front load acting on the seat back is provided to the vehicle body side.
The connecting means includes an engaging member provided on one of a seat back and a door, and an engaged member provided on the other of the seat back and the door and engaged with the engaging member.
A vehicle seat characterized in that an engagement releasing means for releasing the engagement between the engaging member and the engaged member by opening the door is provided between the engaging member and the engaged member. Reinforcement structure.   The engaged member includes a plurality of vertical grooves formed at a predetermined pitch in the vehicle front-rear direction, while the engaging member is urged by a spring in a direction to engage with the vertical grooves, The reinforcing structure for a vehicle seat according to claim 1, further comprising an engaging claw to be engaged.   The engagement release means pushes the engagement portion of the engagement member in the engagement release direction by the engaged member when a load in the door opening direction is applied to the engagement portion between the engagement member and the engagement member. The reinforcing structure for a vehicle seat according to claim 1, wherein the structure is a first idling mechanism to be moved.   The disengaging means moves the engaging portion of the engaged member in the disengaging direction by the engaging member when a load in the door opening direction acts on the engaging portion of the engaging member and the engaged member. The reinforcing structure for a vehicle seat according to claim 1, wherein the structure is a second idle swing mechanism.   When the load that moves the seat back to the front of the vehicle is applied to the engaging portion between the engaging member and the engaged member, the connecting means engages the engaging portion of the engaging member or the engaging portion of the engaged member. The vehicle seat reinforcing structure according to any one of claims 1 to 4, further comprising release blocking means for blocking the movement of the vehicle in a disengagement direction.   The release prevention means moves the engagement portion of the engagement member relative to the seat back by a load that moves the seat back forward of the vehicle, and locks the engagement release prevention side of the engagement portion to the stopper. The vehicle seat reinforcing structure according to claim 5, wherein the structure is a stopper locking mechanism.   The release preventing means is an engagement promoting mechanism that further moves the engagement portion of the engaged member in the engagement direction with the engagement member by a load that moves the seat back forward of the vehicle. 2. A vehicle seat reinforcing structure according to 1. An engagement member provided on one of the doors facing the seat back or the vehicle lateral direction outer side surface and an engaged member provided on the other side of the seat back or the door are engaged to act on the seat back. A vehicle seat reinforcing method for transmitting a vehicle front load to a door side and releasing engagement between an engaging member and an engaged member when the door is opened.

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