JP5408690B2 - Vehicle seat structure - Google Patents

Description

  The present invention relates to a vehicle seat structure such as an aircraft, a train, a ship, and a bus, and more particularly to a vehicle seat structure suitable as a two-seat seat for a passenger seat in an aircraft.

  For example, as shown in Patent Documents 1 and 2, a vehicle seat installed in a passenger cabin of an aircraft has a plurality of seats connected along the width direction of the fuselage across a passage. Legs are provided on both sides of each seat, and the legs are fixed to mounting rails laid on the floor of the fuselage. As shown in Patent Document 3, the mounting rail includes a large number of engaging recesses and a narrow portion positioned between adjacent engaging recesses, and is fixed to the floor along the longitudinal direction of the fuselage. The fixed stud is inserted from the engaging recess, shifted by a half pitch and positioned at the narrow width portion and fixed with a bolt, and the leg portion is firmly fixed to the fixed stud with a bolt and a connecting bracket. To do. The fixed stud is positioned in the narrow width portion to prevent the fixing stud from coming off from the mounting rail.

In addition, as shown in Patent Documents 2 and 4, the gantry frame that supports the seat cushion portion and the seat back portion is provided with legs that are substantially parallel to each other along the width direction of the fuselage before and after the seat cushion portion. A front beam and a rear beam disposed at the top of the section. Further, as shown in FIG. 1 of Patent Document 1, FIG. 1 of Patent Document 2, and FIGS. 7 and 8 of Patent Document 5, it is below the front edge of the seat cushion portion, A cross member is provided between the legs and prevents the luggage stored in the space between the seat cushion portion of the front seat and the floor from jumping forward from the rear seat side.
JP 2001-314261 A JP 2006-240379 A JP 2003-226294 A JP 7-257491 A JP 2005-219636 A

  By the way, in recent years, in order to reduce the weight of airframes, vehicle bodies, and the like from the viewpoint of improving fuel efficiency, there is an increasing expectation for weight reduction of seats installed on them. However, in the conventional structure, as shown in Patent Documents 2 and 4, in order to ensure a predetermined strength as the front beam and the rear beam, a pipe material having a diameter larger than a predetermined value must be used. There was a limit to weight reduction. Moreover, in patent document 4, while making each connection part of a front beam and a rear beam, and a leg part rotatable, while absorbing an impact energy, the energy absorption member which can be expanded-contracted between front-and-back leg parts is provided. The structure which is provided and absorbs impact energy also by the action of this energy absorbing member is shown. However, it is not preferable from the viewpoint of weight reduction to provide a new member on the gantry frame for absorbing such impact energy.

  The present invention has been made in view of the above, and provides a vehicle seat structure that can reliably support the load of an occupant and has excellent vibration absorption characteristics and shock absorption characteristics, while having a light weight structure. The task is to do.

  In order to solve the above problems, the present inventor considers distributing the force applied by human weight, vibration, impact, etc., rather than concentrating on the front beam, the rear beam, and the leg as in the past. did. First of all, paying attention to the cross member spanned between the legs below the seat cushion part, which has been conventionally provided only for the function of preventing the forward movement of the luggage while being mounted on the gantry frame, The use of a cross member as a strength member carrying a predetermined strength was examined. In addition, while using the cross member as a strength member, the cross member was considered to have an impact absorbing function. Furthermore, it is considered that the heavy front beam and rear beam can be replaced with a torsion bar, and it is considered that the weight can be reduced and the vibration absorbing function and the shock absorbing function can be enhanced, thereby completing the present invention. It came to.

That is, in the present invention according to claim 1, a gantry frame provided with a pair of legs attached to a mounting rail laid at a predetermined interval on the floor of the vehicle body;
A plurality of seats supported by the gantry frame, each having a seat cushion portion and a seat back portion between the pair of leg portions;
A vehicle seat structure comprising:
The cradle frame is
A center frame located between the pair of legs and between the adjacent seats, the lower end being arranged without being fixed to the floor;
The front of the luggage that is bridged between the pair of legs so as to be positioned near the front edge of the seat cushion portion of each seat and is stored in the space between the seat cushion portion and the floor from the rear seat side. With cross members to prevent jumping out,
One end of the cross member is fixed in the vicinity of the mounting base with the mounting rail in one leg of the pair of legs, and is integrated with the one leg. Connected to the side panels of the legs ,
The center frame has a substantially triangular shape in a side view and is connected to the cross member, and a connecting portion with the cross member is the lower end portion,
In addition, the seat cushion portion is disposed at a distance in the front and rear direction, penetrates the center frame, and each end portion is fixed to the window side leg portion and the passage side leg portion constituting the pair of leg portions, respectively. The cushion supporting front torsion bar and the cushion supporting rear torsion bar, the arm member connected to the cushion supporting front torsion bar and the cushion supporting rear torsion bar, and the cushion connected to the arm member. Provided is a vehicle seat structure characterized by being elastically supported by a seat cushion support mechanism including a support front torsion bar and a support frame disposed in parallel with the cushion support rear torsion bar. .
According to a second aspect of the present invention, there is provided the vehicle seat structure according to the first aspect , wherein the arm members corresponding to the front and rear are connected by a link member .
According to a third aspect of the present invention, a stopper is provided on the window-side leg and the passage-side leg so as to correspond to the link members respectively disposed near the window-side leg and the passage-side leg among the link members. A rubber member laminated on the member and the stopper member is provided;
A stopper member is provided on the center frame in correspondence with the link members disposed on both sides of the center frame among the link members,
During normal operation, the link members respectively disposed near the window side leg and the passage side leg are in contact with the rubber member to regulate the operation range of each link member,
3. The structure according to claim 2, wherein when an impact is applied, each stopper member including a stopper member of the center frame is pressed to cause deformation around the center frame. A vehicle seat structure is provided.
In this invention of Claim 4, the said mount frame is
A first torsion bar disposed at a position corresponding to a front edge side of the seat cushion portion, spanned between the pair of leg portions, and coupled to the center frame in the middle;
A second torsion bar disposed at a position corresponding to the vicinity of a boundary between the seat cushion portion and the seat back portion, spanned between the recliners, and connected to the center frame in the middle;
To have to provide a vehicle seat structure according to any one of claims 1 to 3, wherein the.
The vehicle according to any one of claims 1 to 4, wherein the center frame is provided such that a lower end portion thereof is positioned away from the floor. A sheet structure is provided.
The present invention according to claim 6 is characterized in that the center frame has a structure in which two side panels are arranged to face each other, and a joint portion between the side panels is caulked over the entire circumference. A vehicle seat structure according to claim 1 is provided.
According to a seventh aspect of the present invention, there is provided the vehicle seat structure according to the sixth aspect, further comprising a reinforcing member arranged in a truss structure in a side view between the side panels forming the center frame.
In the present invention of claim 8, wherein, of the pair of leg portions, the junction of the side panel between the other leg portion, for a vehicle according to claim 1, characterized in that it is partially caulked Provide a sheet structure.
The present invention according to claim 9 is characterized in that the first torsion bar is provided with initial tension applied in a direction in which a lower end portion of the center frame is urged forward. 4. A vehicle seat structure according to claim 4 is provided.
According to the tenth aspect of the present invention, the base end portion of the table arm member rotates in the vicinity of the upper portion of the one or the other leg portion and the upper portion of the center frame corresponding to each of the seat back portions. A table support reinforcing frame is provided between the distal ends of the table arm members so that the base end portion of the table is pivotally supported.
As each table arm member, one having a length shorter than the distance between the lower end edge of the table storage recess formed on the back surface of the seat back portion and the recliner is used, and each table arm member and table support member are used. reinforcing frame provides a vehicle seat structure according to claim 1 characterized in that it is a structure that functions as a strength member with the mount frame.
In the present invention described in claim 11, the base end portion, which is the rotation center of the table arm member, is located on a bisector of the maximum reclining angle of the seat back portion with the recliner as the center in a side view. The vehicle seat structure according to claim 10, wherein the vehicle seat structure is set.
The present invention according to claim 12 provides the vehicle seat structure according to any one of claims 1 to 11 , wherein the vehicle seat structure is used for a passenger seat of a vehicle.
According to a thirteenth aspect of the present invention, there is provided the vehicle seat structure according to the twelfth aspect, which is used as a seat for a two-seater passenger seat of an aircraft.

  The vehicle seat structure of the present invention is located between a pair of leg portions and between adjacent seats, and is provided with a center frame arranged with its lower end portion not fixed to the floor, and one end side of the cross member is provided. It is fixed in the vicinity of the mounting base with the mounting rail in one leg and integrated with the one leg, the other end is connected to the side panel of the other leg, and the center frame is connected to this cross member. It is a connected structure. That is, one end side of the cross member has a structure that is directly fixed to the floor by being fixed to the mounting rail together with the vicinity of the mounting base of one leg. As a result, the cross member not only functions to prevent the load inserted from the rear seat side from jumping forward, but also as a strength member that supports the load of the passenger transmitted through each leg and the center frame. Function. When the cross member does not function as a strength member, conventionally, the center frame was fixed to a mounting rail laid on the floor and had the same function as other legs, but by using the cross member as a strength member, What is necessary is just to connect the lower end part of a center frame with this intensity | strength member, and weight reduction of a center frame can be achieved. Further, since the center frame can be connected to and supported by the cross member, forming a substantially triangular shape in a side view can secure a wide space for passengers to put in the rear seats and a luggage storage space.

  The cross member is firmly fixed at one end side, and the other end side is connected to a thin plate-like side panel forming the other leg. Since the side panel can be slightly deformed, the force input to the cross member is transmitted and distributed to the side panel and the reinforcing frame disposed inside the side panel, and the energy of vibration and impact force is distributed. Absorption takes place.

  Further, the front beam and the rear beam can be eliminated, and a torsion bar can be used in place of them to reduce the weight. In the torsion bar arranged in place of the front beam, it is preferable that initial tension is applied in a direction in which the lower end portion of the center frame rotates upward from the front. When the lower end portion of the center frame is urged in this way, the cross member connected to the lower end portion is urged forward, and as a result, the leg portion is urged forward in the mounting rail. It becomes difficult to come off. Since the torsion bar causes a force to rotate the lower end portion of the center frame upward from the front, the torsion bar functions as a force that cancels out the force that presses the front edge side downward, which is generated when a large impact is applied by a front collision or the like.

  Hereinafter, the present invention will be described in more detail based on the embodiments shown in the drawings. FIG. 1 is a front view showing a vehicle seat structure 1 according to an embodiment of the present invention, and FIG. 2 shows a state in which the seat cushion part 110 of the window seat 10 and the cushion material of the seat back part 140 are removed. FIG. The vehicle seat structure 1 is installed in a plane for passenger seats. In this embodiment, two seats (the window side seat 10 and the passage side seat 20) are provided adjacent to each other.

  Mounting rails 11 and 21 are laid on the floor of the machine body on the window side and the passage side, respectively. However, in the example shown in FIG. 1, since the floor protrudes upward on the window side, the mounting rail 11 laid on the window side is located above the mounting rail 21 on the passage side.

  The gantry frame 30 has leg portions (window-side leg portions) 31 disposed on the window side and leg portions (path-side leg portions) 32 disposed on the passage side. As shown in FIGS. 4 and 9 (c), the window-side leg portion 31 is formed by facing the inner panel 31a and the outer panel 31b made of a thin plate having a substantially U-shaped cross section, and caulking the peripheral edges facing each other. The mounting base 31c is preferably formed by hemming, and is integrally formed with a mounting base 31c extending below the inner panel 31a. However, the range in which the inner panel 31a and the outer panel 31b are caulked is preferably as close to the entire periphery as possible. Thereby, the influence of the shift between the two panels 31a and 31b is reduced, and the rigidity is increased. Of course, an adhesive or the like may be interposed between the rimmed edges as necessary. As shown in FIGS. 6, 9, and 10, a fixing stud 311 located on the front side and a fixing stud 312 located on the rear side are attached to the mounting rail 11. The base 31c is firmly fixed by the connecting fitting 313, the bolt 314, and the like. The mounting rail 11 is formed with an engaging recess and a narrow width portion. The engaging studs 311 and 312 are inserted from the engaging recess and are positioned in the narrow width portion so that the fixing stud 311 is inserted. Fixing 312 to the mounting rail 11 is the same as the technique shown in Patent Document 3.

  Similarly to the window-side leg portion 31, the passage-side leg portion 32 also has an inner panel 32a and an outer panel 32b made of a thin plate having a substantially U-shaped cross section facing each other, as shown in FIGS. Are formed by caulking, preferably hemming, the opposing peripheral edges. However, in the passage side leg portion 32, a place where the inner panel 32a and the outer panel 32b are not partially caulked is provided. Thereby, the inner panel 32a can be slightly displaced relative to the outer panel 32b. Of course, an adhesive or the like may be interposed in the caulked portion as necessary. The passage-side leg portion 32 is fixed to fixing studs 321 and 322 that are separated from each other in the front-and-rear direction and are attached to the attachment rail 21 via a connection fitting 323 and a bolt 324 (see FIGS. 7 and 9A).

  As shown in FIGS. 4 and 9 (b), the center frame 33 has an inner panel 33a and an outer panel 33b made of a thin plate having a substantially U-shaped cross section, as shown in FIGS. Are opposed to each other and the opposite peripheral edges are caulked, preferably hemmed. The range in which the inner panel 33a and the outer panel 33b are caulked is preferably as close to the entire periphery as possible in order to increase the rigidity, like the window side leg portion 31. Of course, an adhesive or the like may be interposed between the rimmed edges as necessary. As shown in FIGS. 8 and 9B, the center frame 33 has a lower frame portion 332 that is located below the upper portion of the seat cushion portion 331 than the upper frame portion 331 that supports the center armrest 335. It is formed in a substantially right triangle shape as viewed. Further, a substantially right-angled corner 332 a is formed so as to be positioned on the front edge side of the seat cushion portion, and the lower end thereof is the lower end 332 b positioned at the lowest position in the center frame 33. ing. And it forms so that the hypotenuse part 332c which goes to back diagonally upward may be located from this lower end part 332b. As shown in FIGS. 2 and 8, the length from the substantially right-angled corner 332a to the lower end 332b is determined when the substantially right-angled corner 332a is positioned near the front edge of the seat cushion portion. The lower end portion 332b is formed with a length that is a separated position that does not contact the floor. The lower end portion 332b is preferably provided so as not to contact the floor as described above. However, by providing the lower end portion 332b so as not to be fixed to the floor, the center frame 33 itself can have an auxiliary support function. Even if it is provided so as to be in contact with the floor in this manner, it is not fixed to the mounting rails 11 and 21 like the leg portions 31 and 32. Therefore, the lower end portion 332b of the center frame described later is urged forward. Power works.

  As shown in FIG. 12, for example, a reinforcing member is provided between the inner panel 33a and the outer panel 33b of the lower frame portion 332 so as to have a truss structure, and the rigidity of the center frame 33 is further increased. ing. Further, the lower end portion 332b of the lower frame portion 332 is provided with a connecting portion 332d to which a later-described cross member 34 is connected (see FIGS. 8, 9B, and 12).

  The cross member 34 is provided so as to be positioned in the space between the seat cushion portion and the floor, and is essentially designed to project the luggage stored in the space between the seat cushion portion and the floor from the rear seat side to the front. Has the function of blocking. However, in the present embodiment, the cross member 34 functions as a strength member of the gantry frame 30 in addition to such a function. That is, the cross member 34 of this embodiment includes a long side portion 341 and two short side portions 342 that protrude rearward from both ends of the long side portion 341, as shown in FIGS. The short side portions 342 and 343 are connected and fixed to the window side leg portion 31 and the passage side leg portion 32, respectively. As shown in FIGS. 1, 2, and 14, in the vicinity of the window side, the vicinity of the end portion of the long side portion 341 is formed so as to protrude upward and then protrude rearward. This is because the window-side mounting rail 11 is positioned above the passage-side mounting rail 21.

  As shown in FIG. 6, the short side portion 342 closer to the window side is fastened to the mounting base portion 31 c of the window side leg portion 31 by a bolt 314 together with the connecting metal 313 connected to the fixing studs 311 and 312. In other words, the short side portion 342 on the window side of the cross member 34 is directly fixed to the fixing studs 311 and 312 attached to the attachment rail 11 via the connection fitting 313. On the other hand, the short side portion 343 on the passage side is fixed to the inner panel 32a which is a side panel of the passage side leg portion 32 by bolts 325, as shown in FIGS. The bolt 325 is further coupled to a reinforcing member 327 and the like disposed between the inner panel 32a and the outer panel 32b of the passage side leg 32 (see FIG. 11). As a result, the short side portion 342 of the cross member 34 closer to the window side is coupled to the mounting rail 11 together with the window side leg portion 31, and the inner panel 31a and the outer panel 32a of the window side leg portion 31 are caulked over substantially the entire circumference. Since it is processed, the short side portion 342 is firmly integrated with the window side leg portion 31 and the mounting rail 11. On the other hand, even if the short side portion 343 on the passage side is connected to the inner panel 32a and the reinforcing member 327, the inner panel 32a has a thin plate shape, and the inner panel 32a and the outer panel 32b are caulked. Since the range is partial as described above, the short side portion 343 on the passage side can be slightly displaced.

  Therefore, when a person is seated, a force is mainly input in the direction of gravity from the seat cushion portion and the seat back portion, but the force is distributed to the floor via the window side leg portion 31 and the passage side leg portion 32. . Since the cross member 34 is connected to the lower end portion 332b of the center frame 33 and the lower end portion 332b is not fixed to the floor, the force input through the center frame 33 is transmitted to the cross member 34. The The force transmitted to the cross member 34 becomes a moment in the clockwise direction when viewed from the side surface with the substantially right-angled corner portion 332 a at the upper front portion of the center frame 33 as the center. On the other hand, the force in the front-rear direction input from the floor is transmitted to the cross member 34 via the window-side leg portion 31 and the passage-side leg portion 32, so that the center frame 33 has a substantially right-angled corner 332 a as a center. When viewed, the moment is counterclockwise. As a result, a force balance relationship is generated in the cross member 34.

  Further, as described above, since the cross member 34 is firmly fixed by the window side leg portion 31, the force applied to the seat is very small at the connecting portion between the passage side leg portion 32 and the short side portion 343 on the passage side. In addition to being absorbed by the deformation, it is also dispersed through the reinforcing member 327 in the passage-side leg portion 32. The cross member 34 can be made of an aluminum material, but preferably has a solid structure in order to increase the strength. For example, it can be formed into a structure in which an aluminum material is formed into a substantially rectangular cross section and the inside thereof is filled with a foam molded body by a bead method, which will be described later, or a bead foam resin elastic member coated with an elastic coating material.

  As shown in FIGS. 2, 13, 14, and 18, the gantry frame 30 of the present embodiment is disposed between the front end portion of the window side leg portion 31 and the front end portion of the passage side leg portion 32. A first torsion bar 35 is provided so as to penetrate a substantially right-angled corner 332 a of the frame 33. Although the first torsion bar 35 is connected to the center frame 33, it is preferable to provide the first torsion bar 35 with initial tension in a direction in which the lower end portion 332b of the center frame 33 is urged forward.

  A second torsion bar 36 is provided between the rear end portion of the window side leg portion 31 and the rear end portion of the passage side leg portion 32 so as to penetrate the rear end portion of the center frame 33. More specifically, as shown in FIGS. 10 and 11, each end portion of the second torsion bar 36 has a recliner 319 disposed between the inner frame 31 a and the outer frame 31 b of the window side leg portion 31. And fixed to a recliner 329 disposed between the inner frame 32a and the outer frame 32b of the passage-side leg portion 32, and the central portion is coupled to a hinge support member 339 of the center frame 33 (FIGS. 12 and 12). 14).

  By providing the first torsion bar 35 and the second torsion bar 36, the conventional front beam and rear beam become unnecessary, which contributes to weight reduction. Moreover, the first torsion bar 35 can efficiently convert the force in the gravitational direction due to the seating by the force in the front-rear direction via the center frame 33 by applying the initial tension as described above. Since the second torsion bar 36 is disposed between the recliners of the window side leg portion 31 and the passage side leg portion 32, the second torsion bar 36 normally functions only as a rigid member. When a force is applied in the twisting direction or the bending direction of the torsion bar 36, the function of absorbing the force is achieved by the elastic force.

  The window-side seat 10 and the passage-side seat 20 have seat cushion portions 110 and 120 and seat back portions 140 and 150, respectively, via a center frame 33. The seat cushion portions 110 and 120 are supported by a cushion supporting front torsion bar 37 and a cushion supporting rear torsion bar 38 that are disposed at a distance in the front-rear direction in both the window side seat 10 and the passage side seat 20. . The cushion supporting front torsion bar 37 and the cushion supporting rear torsion bar 38 pass through the center frame 33 and are fixed to the window side leg portion 31 and the passage side leg portion 32 at respective ends. A portion passing through the center frame 33 is also fixed to the center frame 33. Accordingly, the cushion supporting front torsion bar 37 and the cushion supporting rear torsion bar 38 together with the first and second torsion bars 35 and 36 described above also function as strength members that increase the strength of the gantry frame 30. ing.

  The cushion support front torsion bar 37 and the cushion support rear torsion bar 38 correspond to the seats with the center frame 33 interposed therebetween, respectively, with arm members 113, 114, 123, 124 is provided, and support frames 115, 116, 125, and 126 are provided at the tips of the arm members 113, 114, 123, and 124 so as to be parallel to the torsion bars 37 and 38. The arm members 113 and 123 attached to the cushion-supporting front torsion bar 37 and the arm members 114 and 124 attached to the cushion-supporting rear torsion bar 38 correspond to each other (in the window-side seat 10, the window side The arm members 113 and 123 positioned near the leg 31, the arm members 113 and 123 positioned near the center frame 33, and the arm member 114 positioned near the path side leg 32 in the path side seat 20 124 and arm members 114 and 124 positioned near the center frame 33 are connected by link members 391 to 394, respectively. As a result, when a load is applied to the seat cushion portions 110 and 120, the arm members 113 and 123 positioned forward and backward in the window side seat 10 or the arm members 114 and 124 positioned forward and backward in the passage side seat 20 are linked to the link member 391. Are displaced in synchronism with each other through 394, and the cushion supporting front torsion bar 37 and the cushion supporting rear torsion bar 38 are twisted together to function the elastic force.

  Here, the movement of the link members 391 to 394 will be described. As shown in FIG. 13B, the window leg 31 is provided with a stopper member 391a projecting toward the center frame 33, and the center frame 33 projects toward the window leg 31 and the passage leg 32, respectively. Stopper members 392a and 393a are provided, and the passage-side leg portion 32 is provided with a stopper member 394a protruding toward the center frame 33 side. 4B and 13B, rubber members 391b and 394b are laminated and supported on the stopper member 391a of the window-side leg portion 31 and the stopper member 394a of the passage-side leg portion 32, respectively. ing. The heights of the upper surfaces of the two rubber members 391b and 394b are provided to be higher than the stopper members 392a and 393a provided on the center frame 33.

  When vibration is transmitted from the floor in a state where a person is seated on the seat cushion portions 110 and 120, the cushion support front torsion bar 37 and the cushion support rear torsion bar are caused by the displacement of the arm members 113, 114, 123, and 124. 38 is twisted, and the vibration is isolated by the elastic force of each torsion bar 37, 38. At this time, the twisting angle of each torsion bar 37, 38 and the displacement angle of each arm member 113, 114, 123, 124 are provided near the link member 391 and the passage side leg 32 provided near the window side leg 31. The linked members 394 are in contact with the rubber members 391b and 394b, respectively. By abutting the rubber members 391b and 394b, the force for twisting the torsion bars 37 and 38 is received by the window side leg portion 31 and the passage side leg portion 32. On the other hand, when the two link members 391 and 394 come into contact with the rubber members 391b and 394b, the link members 392 and 393 provided on both sides of the center frame 33 do not come into contact with the stopper members 392a and 393a. . Accordingly, the stopper members 392a and 393a provided on both sides of the center frame 33 do not function during normal operation.

  On the other hand, if a large impact is applied due to a frontal impact or the like and a large force is applied to push the seat cushion parts 110 and 120 forward and downward, the link members 391 to 394 are also greatly pushed forward and downward. The link member 391 and the link member 394 provided near the passage-side leg 32 are provided on both sides of the center frame 33 in addition to pressing the stopper members 391a and 394a while crushing the rubber members 391b and 394b, respectively. The link members 392 and 393 are also brought into contact with the stopper members 392a and 393a and pressed forward and downward. As a result, the portion of the cross member 34 connected to the center frame 33 is pressed forward and downward, and is largely deformed forward and downward. That is, in the portion where the center frame 33 is located, it becomes a crushable zone where a large deformation occurs. However, this crushable zone is set so as to occur around the center frame 33 between the window side seat 10 and the aisle side seat 20, that is, around a portion where no person is seated. This is a configuration in which the damage to the person is less than when it is provided on the part where the person is seated. In the present embodiment, the stopper members 391a to 394a and the rubber members 391b and 394b are provided corresponding to the link members 391 to 394, but the arm members 113, 114, 123, and 124 are provided. It is also possible to provide it so as to abut.

  The seat cushion portions 110 and 120 are connected to and supported by the support frames 115, 116, 125, and 126 described above. The cushion support front torsion bar 37, the cushion support rear torsion bar 38, and the arm members 113, 114, 123, 124, the support frames 115, 116, 125, 126, and the link members 391-394 constitute a seat cushion support mechanism in the present embodiment. The seat cushion portions 110 and 120 include a cushion pan and a cushion material laminated on the cushion pan. The support frames 115 and 125 are connected to the front side of the back surface of the cushion pan. Support frames 116 and 126 are connected. In addition, as a cushion material, a three-dimensional solid knitted fabric, a urethane material, etc. can be used. In addition, a foam molded article by a resin bead method containing at least one of polystyrene, polypropylene, and polyethylene is an elastic covering material having a high elongation and a recovery rate (for example, trade name “Espan” manufactured by KB Seiren Co., Ltd.). A bead foamed resin elastic member coated with “Sione”) can be used. Moreover, it can also be set as the structure which laminated | stacked two or more suitably combining three-dimensional solid knitted fabric, a urethane material, a bead foaming resin elastic member, etc. In these, since the bead foam resin elastic member is very lightweight, in order to reduce the weight of the cushion material, it is preferable that the bead foam resin elastic member is included.

  When a person is seated on the seat cushion portions 110 and 120, as described above, the cushion supporting front torsion bar 37 and the cushion supporting rear torsion bar 38 are twisted together, and the elastic force functions. Even if a thin and lightweight cushion material is used, the elasticity of each torsion bar 37, 38 allows a person to sit without feeling a bottom. Further, even when vibrations input from the floor are transmitted through the window side leg portion 31, the passage side leg portion 32, etc., they are absorbed by the elasticity of the torsion bars 37 and 38. Note that the cushion support front torsion bar 37 and the cushion support rear torsion bar 38 are both connected to the center frame 33, so the center frame 33 serves as a fixed end, and the window side seat 10 and the passage side seat 20 Each functions as a separate torsion bar. Therefore, it is not easily affected by the person sitting next to you.

  As shown in FIGS. 16 and 17, the seat back portions 140 and 150 include back frames 142 and 152 formed in a substantially inverted U shape when viewed from the front, side edges and upper portions of the back frames 142 and 152. Back pans 141 and 151 whose edges are riveted, and brackets 143 and 153 provided at the lower ends of both side portions of the back frames 142 and 152 are provided. The brackets 143 and 153 are attached to the gantry frame 30 by fastening members such as bolts. It is attached. Specifically, in the window side seat 10, one bracket 143 is connected to a recliner 319 provided on the window side leg 31 by a bolt, and the other bracket 143 is connected to a hinge 339 b provided on the center frame 33 by a bolt. The seat back part 140 is supported and can recline back and forth with respect to the seat cushion part 110. In the passage-side seat 20, one bracket 153 is connected to a recliner 329 provided on the passage-side leg 32 by a bolt, and the other bracket 153 is connected to and supported by a hinge 339b provided on the center frame 33, The seat back part 150 can be reclined back and forth with respect to the seat cushion part 120. Since the back pans 141 and 151 and the back frames 142 and 152 of the seat back portions 140 and 150 are connected to the mount frame 30 by bolts via the brackets 143 and 153, the rigidity of the seat frame is increased as with the mount frame 30. Contribute to.

  Here, the recliners 319 and 329 provided on the window-side leg 31 and the passage-side leg 32 are different from those used in conventional aircraft seats, and use the meshing of gears employed in automobile seats. The recliner has a function to withstand a backward moment of about 1500 to 2500 N · m on one side by meshing of the gears. And if it is considered as one seat including left and right seats for two people, it will be a recliner structure on both sides, which contributes to an increase in the rigidity of the seat frame. On the other hand, the hinge 339b of the center frame 33 is elastically supported by a spiral spring 339a as shown in FIG.

  That is, the connection portions of the window side leg portion 31 and the passage side leg portion 32 with the recliners 319 and 329 are firmly fixed, and the connection portion with the hinge 339b of the center frame 33 and the cross member 34 below the seat cushion portion In the connecting portion, deformation is allowed. Therefore, when a rear seat occupant collides with the front seat back portions 140 and 150 due to a front collision or the like, it is deformed back and forth at the connecting portion with the hinge 339b of the center frame 33 at the center. Is distributed and relaxed, and the reaction force against the seated person in the front seat is reduced.

  The back pans 141 and 151 are formed of an aluminum plate to which tension is applied by pressing or the like, and are fixed to the back frames 142 and 152 so that the lower edge side is more curved than the upper edge side. Reinforcing frames 141a and 151a (141a not shown) are stretched on the back, back, and back of the back pans 141 and 151. The back pans 141 and 151 are formed in this manner, and the lower edges of the back pans 141 and 151 are open without being fixed by the back frames 142 and 152 formed in a substantially inverted U shape. Thus, the back pans 141 and 151 are pressed at the center portion when a person's weight is applied, and the spring property functions. The back frames 142 and 152 are formed by hemming with the peripheral edges of the two frame members facing each other, and a predetermined strength can be ensured even though they are thin frame members. Cushion materials for the seat back portions 140 and 150 are laminated on the back pans 141 and 151 so as to cover them. As the cushion material, a three-dimensional knitted fabric, a urethane material, a bead foamed resin elastic member, and the like can be used similarly to the seat cushion portions 110, 120, and a structure in which a plurality of these are appropriately combined and laminated. You can also. In particular, when a laminated structure of a bead foamed resin elastic member and a three-dimensional solid knitted fabric is used, a cushion material having a high cushioning property can be obtained while being lightweight.

  In the window side seat 10, as shown in FIG. 18, a table arm member 41 that is rotatably connected to the vicinity of the upper portion of the window side leg portion 31 and a table that is rotatably connected to the vicinity of the upper portion of the center frame 33. Arm member 42 is provided, and a table support reinforcing frame 43 is bridged between the tip ends of the table arm members 41 and 42. A base end portion 40 a of the table 40 is pivotally supported on the table support reinforcing frame 43.

  Generally, when the base end portion of the table arm member is pivotally supported on the side portion of the seat back portion, the position of the table changes as the seat back portion tilts. For this reason, for example, as shown in Japanese Patent Application Laid-Open No. 10-86727, the base end portion of the table arm member is attached not to the seat back portion but to the frame material constituting the seat cushion portion. Has been done. However, if the length of the table arm member and the length from the seat back portion recliner to the table storage recess are greatly different, the table is moved to the storage recess when the reclining angle of the seat back portion changes. It cannot be stored. For this reason, the table arm member is set to a length that is substantially the same as the length from the recliner of the seat back portion to the recessed portion for storing the table when the base end portion is disposed at substantially the same position as the recliner. Has been.

  However, in the present embodiment, the base end portions of the table arm members 41 and 42 are rotatably supported near the upper portion of the window side leg portion 31 and the upper portion of the center frame 33. For this reason, the length of each table arm member 41, 42 is shorter than the length from the recliner of the seat back portion to the base end portion 40a of the table 40. In this embodiment, since the table arm members 41 and 42 are also used as strength members, they are shortened in order to minimize bending.

  As shown in FIG. 19, each of the table arm members 41 and 42 includes main arm members 41a and 42a that are pivotally supported on the lower side and auxiliary arm members 41b and 42b that are pivotally supported on the upper side. Have. Of these, it is the main arm members 41a and 42a that determine the position of the base end portion 40a of the table 40, and the auxiliary arm members 41b and 42b are displaced following the main arm members 41a and 42a, thereby increasing the strength. Used to further enhance.

  Further, the main arm members 41a and 42a and the auxiliary arm members 41b and 42b are bent in a substantially inverted letter shape in the vicinity of the base end portion when viewed from the side of the window side leg portion 31 in FIGS. It is preferable that the shape is formed in a substantially square shape near the tip. Thereby, since all of the main arm members 41a and 42a and the auxiliary arm members 41b and 42b follow the shape of the seat back portion, they do not protrude rearward and do not limit the space for the rear seat seated person.

  In the passage-side seat 20, table arm members 44 and 45 are rotatably connected to the vicinity of the upper portion of the passage-side leg portion 32 and the upper portion of the center frame 33, respectively, and a table is provided between the table arm members 44 and 45. A support reinforcing frame 46 is stretched over and the table 47 is supported on the table supporting reinforcing frame 46. In the passage side seat 20, as in the case of the window side seat 10, the table arm members 44 and 45 and the table support reinforcing frame 46 function as strength members. Other configurations of the table arm members 44 and 45 and the table support reinforcing frame 46 are the same as those of the table arm members 41 and 42 and the table support reinforcing frame 43 of the window seat 10.

  Here, as described above, the main arm members 41a, 42a, 44a, 45a that determine the positions of the base end portions 40a, 47a of the tables 40, 47 are from the recliner of the seat back portion to the recesses for storing the tables 40, 47. Shorter than the length of. For this reason, when the attachment position of the base end part of the main arm members 41a, 42a, 44a, 45a is not a predetermined position, when the seat back part is reclined at an arbitrary angle, the table 40 is seated back at that position. It becomes impossible to store in the recess for storage formed on the back surface of the unit, and naturally, the table cannot be locked when stored in the recess for storage. Therefore, it is preferable that the rotation center of the base end portion of the main arm member 41a, 42a, 44a, 45a is set so as to be located approximately on a bisector of the maximum reclining angle of the seat back portion around the recliner. In this way, as shown in FIG. 20, when the table 47 is rotated toward the seat back portion 150 in the state where the seat back portion 150 is reclined rearward (the dashed line in FIG. 20), the storage recess It fits securely in 150a.

  According to the present embodiment, the conventional front beam and rear beam are eliminated, and the lighter and smaller diameter first torsion bar 35 and second torsion bar 36 are used. Thereby, first, significant weight reduction and space saving are achieved. For example, the conventional front beam and rear beam have a diameter of about 60 mm, but the first and second torsion bars 35 and 36 have a diameter of about 8 to 10 mm. . In spite of such weight reduction and space saving, the cross member 34 that has been used as a forward movement preventing member simply as described above is provided as described above as a strength member. Furthermore, the table supporting arm members 41, 42, 44, 45 and the table supporting reinforcing frames 43, 46 are also used as strength members. That is, the strength maintained by the front beam and the rear beam is not limited to the first torsion bar 35 and the second torsion bar 36, but the cross member 34, the table supporting arm members 41, 42, 44, 45, and the table. The supporting reinforcing frames 43 and 46 are also carried. These members are all functionally necessary members in the conventional vehicle seat structure, and by using them as strength members, the use of other reinforcing strength members can be reduced as much as possible. However, it contributes greatly to weight reduction.

  In the above description, the cross member 34 is formed of an aluminum material and filled with a foam molded body to form a solid structure. However, in order to increase the strength, the window side leg portion 31 and the passage side leg portion are formed. 32, the center frame 33, the back frames 142 and 152, and the like are preferably solid structures filled with a foamed molded body or the like. Since the foam-molded article is extremely lightweight, the increase in weight is small even as a solid structure.

  Further, the cross member 34, the window side leg portion 31, the passage side leg portion 32, the center frame 33, the back frames 142, 152, and the like can be configured to have increased strength and springiness by heat treatment. .

  In addition to this, in the present embodiment, not only the load distribution only through the window side leg portion 31 and the passage side leg portion 32 as in the prior art but also the gravity direction through the center frame 33 and the cross member 34 as described above. Dispersion of load, dispersion and balance of load in the front-rear direction input from the floor, center frame 33 by the initial tension of the first torsion bar 35 urges the lower end portion 332b forward, and the mounting rails 11 and 12 High vibration absorption and shock absorption characteristics can be achieved by the action of preventing separation from the floor and the elastic action of the second torsion bar 36 against the distortion of the floor.

  In addition, when a large impact is applied due to a front collision or the like, a force is applied to urge the front edge side of the seat cushion portion forward / downward, so that the lower end portion of the center frame 33 is separated from the floor by the force. In this case, the cross member 34 absorbs an impact by deforming in a substantially square shape leaving the window side leg portion 31 and the passage side leg portion 32 in the front / down direction around the center frame 33. In the present embodiment, as described above, the deformation has the largest effect around the position of the center frame 33 where the person is not seated. Moreover, since the window side leg part 31 is also firmly integrated by the cross member 34, there exists an effect | action which absorbs an impact by deform | transforming inward. Moreover, after the front edge side of the seat cushion part is pushed down, the seated person is pressed against the seat back part by the reaction force. At this time, as shown in FIGS. 7 and 11, the passage-side leg portion 32 has a substantially V-shaped rear end edge, so that the gap between the V-shaped sides is narrowed. It also has the effect of absorbing impacts by deformation.

  Note that an elastic member such as a coil spring, a gas spring, or a damper, or a damping member may be disposed between the lower end portion of the center frame 33 and the floor in order to increase the impact absorbing power. As a result, not only the deformation of the cross member 34 and the legs 31 and 32 but also the spring characteristics and the damping characteristics can be used to reduce the acceleration acting on the person in the event of a front collision.

  21 and 22 are views for explaining a vehicle seat structure according to another embodiment of the present invention. In this embodiment, a life jacket storage section 160 is provided on the back side of the seat cushion sections 110 and 120. The life jacket storage unit 160 includes substantially L-shaped members (substantially L-shaped members) 161 and 161 formed from pipes and the like, an intermediate diagonal member 162, and a substantially U-shaped width direction connecting member (substantially U-shaped). Shaped width direction connecting material) 163, 163, and front width direction connecting material 164. The substantially L-shaped members 161 and 161 are spaced apart from each other in the width direction in the seat cushion portions 110 and 120, and the end portions 161a and 161a of the long side portions located on the rear side are connected to the second torsion bar. 36 is fixed via a connecting member 165 having a U-shaped cross section (see FIG. 22), and ends 161b and 161b of the short sides located on the front side are fixed to the cross member 34. As shown in FIG. 22, the intermediate diagonal member 162 has a vertical portion 162b on the front side when viewed from the side, and is inclined so that the rear side is positioned above the vertical portion 162b. The end of the vertical portion 162b is fixed to the cross member 34, and the end of the oblique side portion 162a is fixed to the second torsion bar 36 via the connection member 165 having a substantially U-shaped cross section. Yes. The substantially U-shaped width direction connecting member 163 has both end portions 163a fixed to the long side portions of the substantially L-shaped members 161 and 161, and the intermediate portion 163b fixed to the oblique side portion 162a of the intermediate diagonal member 162. The substantially L-shaped members 161, 161 and the intermediate diagonal member 162 are arranged in a direction orthogonal to each other. The front width direction connecting member 164 is connected to the short side portion of the substantially L-shaped member and the vertical portion 162b of the intermediate diagonal member 162 and arranged along the width direction.

  As a result, a life jacket storage section 160 formed in a substantially triangular shape when viewed from the side is formed on the width direction connecting member 163 and the intermediate diagonal member 162. The life jacket is put in a container such as a bag, and the engaging portion provided on the container is engaged with, for example, the first torsion bar 35 and stored in the life jacket storing section 160. When taking out, when the engagement part is disengaged, the life jacket is slid forward because the intermediate diagonal member 162 is inclined so as to be higher in the rear part.

  By forming the life jacket storage portion 160 in this way, that is, the substantially L-shaped member 161, the intermediate diagonal member 162, the substantially U-shaped width direction connecting member 163, and the front width direction that constitute the life jacket storage portion 160. By providing the connecting member 164 with the cross member 34 and the second torsion bar 36 being supported, these also function as strength members. As a result, the strength (rigidity) is further improved as compared with the above-described embodiment. This embodiment also uses each member constituting the life jacket storage unit 160 that is functionally necessary in the aircraft seat structure as a strength member, and reduces the use of other strength members only for reinforcement as much as possible. be able to. Further, by providing the life jacket storage unit 160 in this way, the luggage put by the rear seat occupant below the seat cushion portions 110 and 120 and the feet of the rear seat occupant are placed on the back surface of the seat cushion portions 110 and 120. It can prevent hitting directly.

  In the embodiment of FIGS. 21 and 22, in addition to the table support reinforcing frames 43 and 46 which are bridged between the table arm members 41 and 42 and 44 and 45 and support the tables 40 and 47, the table 40 47, closer to the base end of the table arm member than the table support reinforcing frames 43 and 46, which are the rotation centers of the table 47, further reinforcing frames between the table arm members 41 and 42 and 44 and 45, respectively. 48 and 49 are preferably provided. Thereby, the deformation of the table arm members 41, 42, 44, 45 is suppressed, and the rigidity of the gantry frame 30 is further improved. Further, since the rigidity on the side of the tables 40 and 47 is increased, vibrations when the seat back portion 150 and the gantry frame 30 are moved mainly cause the base end portions of the table arm members 41, 42, 44 and 45 to be the window side legs. Damping is caused by vibration at the connecting portion between the portion 31, the passage-side leg portion 32, and the center frame 33, and the vertical shaking of the tables 40 and 47 is reduced.

  FIG. 23 and FIG. 24 are diagrams showing still another embodiment. In this embodiment, the back frame 152 constituting the seat back portion 150 is formed in a substantially rectangular shape, and the lower frame portion 152 a is positioned below the back pan 151. As a result, the strength (rigidity) is improved as compared with the substantially U-shaped back frame 152. As in the above-described embodiment, the back pan 151 may be provided with a spring property as a configuration in which the lower edge portion of the back pan 151 is not fixed using the back frame 152 formed in a substantially inverted U shape. However, when more importance is attached to the rigidity, it is preferable to have a structure including the lower frame portion 152a as in the present embodiment. When a person hits the seat back part 150 from behind, the lower frame part 152a (more precisely, the vertical frame part rising upward from both ends of the horizontal part of the lower frame part 152a) In order to attach the substantially L-shaped member 161 and the intermediate diagonal member 162 constituting the storage portion 160, it hits the connecting member 165 having a U-shaped cross section covering the second torsion bar 36, and the front frame 152 is moved forward. Deformation is suppressed. That is, when a person hits the seat back part 150 from behind, not only is the impact load received by the recliner of the seat back part 150, but also the lower frame part 152a is brought into contact with the connection member 165 having a substantially U-shaped cross section. It will be able to receive a load. As a result, the load burden on the recliner is reduced, and damage and failure of the recliner can be suppressed.

  Further, the periphery of the second torsion bar 36 located in the connection member 165 having a substantially U-shaped cross section is covered with a cushioning material 36a such as rubber having a substantially U-shaped cross section, and the lower frame portion 152a (more precisely, It is preferable that a vertical frame portion rising upward from both ends of the horizontal portion of the lower frame portion 152a abuts against the cushioning material 36a. Thereby, when the seat back portion 150 receives an impact from the rear, the lower frame 152a comes into contact with the cushioning material 36a, so that the impact can be further alleviated, and the second torsion bar is interposed via the cushioning material 36a. By also pressing 36 itself, the spring property by the bending of the second torsion bar 36 also functions, and the acceleration given to the person who collides with the seat back portion 150 can be reduced. Further, the cushioning material 36a is always in contact with the lower frame portion 152a (more precisely, the vertical frame portion that rises upward from both ends of the horizontal portion of the lower frame portion 152a), so that the space between the recliner gears can be reduced. The backlash of the seat back due to the backlash can be reduced. Other configurations are the same as those of the embodiment shown in FIGS.

  In addition, this invention is not limited to what was shown in each above-mentioned embodiment. For example, in the above embodiment, the recliners 319 and 329 are provided on the window side leg portion 31 and the passage side leg portion 32, and the center frame 33 employs a simple hinge 339 instead of the recliner. By arranging the seats 10 and 20, both the seats 10 and 20 may have a both-side recliner structure to further increase the rigidity.

FIG. 1 is a front view showing a vehicle seat structure according to an embodiment of the present invention. FIG. 2 is a view showing a state in which the seat cushion portion of the window seat and the cushion material of the seat back portion are removed from the vehicle seat structure of FIG. 1. FIG. 3 is a cross-sectional view taken along line A in FIG. 4A is a cross-sectional view taken along line C3-C3 in FIG. 2, FIG. 4B is a cross-sectional view taken along line C2-C2 in FIG. 2, and FIG. 4C is a cross-sectional view taken along line C1-C1 in FIG. FIG. 5A is a sectional view taken along line B3-B3 in FIG. 2, FIG. 4B is a sectional view taken along line B2-B2 in FIG. 2, and FIG. 4C is a sectional view taken along line B1-B1 in FIG. FIG. FIG. 6 is a side view of the embodiment as seen from the window side leg direction. FIG. 7 is a side view of the above embodiment as viewed from the passage side leg portion direction. FIG. 8 is a view of the passage-side leg portion viewed from the center frame of the embodiment. FIG. 9A is a perspective view showing the passage-side leg, FIG. 9B is a perspective view showing the center frame, and FIG. 9C is a perspective view showing the window-side leg. FIG. 10A is a diagram showing a detailed structure of the window side leg portion, FIG. 10B is a sectional view taken along line a in FIG. 10A, and FIG. 10C is a sectional view taken along line b in FIG. FIG. 10D is a cross-sectional view taken along the line c in FIG. 10A, and FIG. 10E is a cross-sectional view taken along the line d in FIG. FIG. 11 is a diagram illustrating a detailed structure of the passage-side leg portion. 12A is a diagram showing the detailed structure of the center frame, FIG. 12B is a sectional view taken along the line a in FIG. 12A, and FIG. 12C is a sectional view taken along the line b in FIG. 12D is a cross-sectional view taken along the line c in FIG. 12A, FIG. 12E is a cross-sectional view taken along the line d in FIG. 12A, and FIG. 12F is a cross-sectional view taken along the line e in FIG. is there. FIG. 13A is a view showing a state in which one seat back portion is attached to the gantry frame of the above embodiment, and FIG. 13B is a cross-sectional view taken along line AA in FIG. FIG. 14 shows the gantry frame in detail. FIG. 15 is a view showing a configuration of a cushion support front torsion bar, a cushion support rear torsion bar, each arm member, each support frame, and each link member constituting the seat cushion support mechanism. FIG. 16 is a diagram for explaining the configuration of the seat back portion. FIG. 17 is a view for explaining how to attach the seat back portion to the gantry frame. FIG. 18 is a view for explaining how to attach the table arm member, the table support reinforcing frame, and the table to the gantry frame. FIG. 19 is a diagram showing a detailed structure of the table arm member and the table support reinforcing frame. FIG. 20 is a diagram for explaining the movement of the table. FIG. 21 is a view showing a vehicle seat structure according to another embodiment of the present invention. 22 is a cross-sectional view taken along line BB in FIG. FIG. 23 is a view showing a vehicle seat structure according to still another embodiment of the present invention. 24 is a cross-sectional view taken along line BB in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle seat structure 10 Window side seat 20 Passage side seat 30 Mounting frame 31 Window side leg 319 Recliner 32 Passage side leg 329 Recliner 33 Center frame 339 Hinge support member 34 Cross member 35 First torsion bar 36 Second torsion bar 37 Cushion support front torsion bar 38 Cushion support rear torsion bar 391-394 Link member 391a-394a Stopper member 391b, 394b Rubber member 40, 47 Table 41, 42, 44, 45 Table arm member 43, 46 Table support Reinforcement frame 110, 120 Seat cushion part 113, 114, 123, 124 Arm member 115, 116, 125, 126 Support frame 140, 150 Seat back part

Claims (13)

A gantry frame having a pair of legs attached to mounting rails laid at a predetermined interval on the floor of the vehicle body;
A plurality of seats supported by the gantry frame, each having a seat cushion portion and a seat back portion between the pair of leg portions;
A vehicle seat structure comprising:
The cradle frame is
A center frame located between the pair of legs and between the adjacent seats, the lower end being arranged without being fixed to the floor;
The front of the luggage that is bridged between the pair of legs so as to be positioned near the front edge of the seat cushion portion of each seat and is stored in the space between the seat cushion portion and the floor from the rear seat side. With cross members to prevent jumping out,
One end of the cross member is fixed in the vicinity of the mounting base with the mounting rail in one leg of the pair of legs, and is integrated with the one leg. Connected to the side panels of the legs ,
The center frame has a substantially triangular shape in a side view and is connected to the cross member, and a connecting portion with the cross member is the lower end portion,
In addition, the seat cushion portion is disposed at a distance in the front and rear direction, penetrates the center frame, and each end portion is fixed to the window side leg portion and the passage side leg portion constituting the pair of leg portions, respectively. The cushion supporting front torsion bar and the cushion supporting rear torsion bar, the arm member connected to the cushion supporting front torsion bar and the cushion supporting rear torsion bar, and the cushion connected to the arm member. A vehicle seat structure characterized by being elastically supported by a seat cushion support mechanism including a support front torsion bar and a support frame arranged in parallel with the cushion support rear torsion bar . The vehicle seat structure according to claim 1, wherein the arm members corresponding to the front and rear are connected by a link member . Of the link members, a stopper member and a stopper member are stacked on the window side leg portion and the passage side leg portion so as to correspond to the link members respectively disposed near the window side leg portion and the passage side leg portion. A rubber member is provided,
A stopper member is provided on the center frame in correspondence with the link members disposed on both sides of the center frame among the link members,
During normal operation, the link members respectively disposed near the window side leg and the passage side leg are in contact with the rubber member to regulate the operation range of each link member,
3. The structure according to claim 2, wherein when an impact is applied, each stopper member including a stopper member of the center frame is pressed to cause deformation around the center frame. sheet structure for the vehicle. The cradle frame is
A first torsion bar disposed at a position corresponding to a front edge side of the seat cushion portion, spanned between the pair of leg portions, and coupled to the center frame in the middle;
A second torsion bar disposed at a position corresponding to the vicinity of a boundary between the seat cushion portion and the seat back portion, spanned between the recliners, and connected to the center frame in the middle;
Vehicle seat structure according to any one of claims 1 to 3, characterized in that it has a.   The vehicle seat structure according to any one of claims 1 to 4, wherein the center frame is provided such that a lower end portion thereof is positioned away from the floor. The center frame, the two side panels are opposed structure, the joint between the side surface panels, vehicle seat structure according to claim 1, characterized in that it is caulked over the entire circumference .   The vehicle seat structure according to claim 6, further comprising a reinforcing member disposed in a truss structure in a side view between side panels forming the center frame. Wherein among the pair of leg portions, the other joint side panels between the legs, partially vehicle seat structure according to claim 1, characterized in that it is caulked. 5. The vehicle seat structure according to claim 4, wherein the first torsion bar is provided with an initial tension in a direction in which a lower end portion of the center frame is urged forward. Corresponding to each of the seat back portions, a base end portion of a table arm member is pivotally supported in the vicinity of the upper portion of the one or other leg portion and the upper portion of the center frame. A table support reinforcing frame on which the base end of the table is pivotally supported is provided between the distal ends of the arm members,
As each table arm member, one having a length shorter than the distance between the lower end edge of the table storage recess formed on the back surface of the seat back portion and the recliner is used, and each table arm member and table support member are used. vehicle seat structure according to claim 1, wherein the reinforcing frame is a structure that functions as a strength member with the mount frame.   The base end portion, which is the rotation center of the table arm member, is set so as to be located on a bisector of the maximum reclining angle of the seat back portion with the recliner as the center, in a side view. The vehicle seat structure according to claim 10. The vehicle seat structure according to any one of claims 1 to 11 , wherein the vehicle seat structure is used for a passenger seat of a vehicle. 13. The vehicle seat structure according to claim 12 , wherein the vehicle seat structure is used as a seat for a passenger seat for two people on an aircraft.

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