WO2014104361A1

WO2014104361A1 - Vehicle seat

Info

Publication number: WO2014104361A1
Application number: PCT/JP2013/085253
Authority: WO
Inventors: 阿部　浩久; 武志阿久津; 陽木井川
Original assignee: テイ・エステック株式会社
Priority date: 2012-12-28
Filing date: 2013-12-27
Publication date: 2014-07-03

Abstract

Provided is a vehicle seat in which the stored state thereof can be made more compact while suppressing interference among rotary links. This storable seat (S) includes an inner link (21), an outer link (22), and a guide link (23) which are connected to a seat cushion (1) of the seat (S) and which rotate with respect to a vehicle body floor in order to move the seat cushion (1) to a stored position. The inner link (21), the outer link (22), and the guide link (23) are arranged at positions different from one another in the width direction of the seat (S), and thus, interference among the rotary links is suppressed. Further, the guide link (23) is arranged at a different position from the inner link (21) and the outer link (22) in the front-to-rear direction of the seat (S), and thus, the seat (S) can be stored in a compact manner.

Description

Vehicle seat

The present invention relates to a vehicle seat, and more particularly to a vehicle seat capable of storing a seat cushion and a seat back in a storage position formed on a vehicle body floor by rotating a rotation link connected to the seat cushion. .

Vehicle seats that can be stored in the storage position formed on the vehicle body floor are already well known, and among them are vehicle seats that correspond to the rear seats of the vehicle, and are provided behind the vehicle body floor by jumping backward. There is a vehicle seat that can be stored in the recessed portion (for example, see Patent Document 1).

As a mechanism for storing a vehicle seat, a rotation link that connects the seat cushion of a vehicle seat and a vehicle body floor and rotates with respect to the vehicle body floor is known. The seating portion including the seat cushion moves toward the storage position by the turning operation of the turning link. In the vehicle seat described in Patent Document 1, as shown in FIG. 28, two pivot links 100 are provided on the front side and two on the rear side of the seat cushion. The link 100 rotates with respect to the vehicle body floor while being synchronized.

Japanese Patent No. 4019456

Here, a retractable vehicle seat is usually provided with a plurality of the pivot links 100 as in Patent Document 1, but naturally, the pivot links 100 do not interfere with each other during the pivoting. Need to be placed in position. On the other hand, it is desirable that the vehicle seat can be stored more compactly. However, depending on the arrangement layout of the plurality of rotation links 100, a wider installation space must be secured, and it becomes difficult to realize a compact vehicle seat in the stored state.

Further, when arranging the plurality of rotation links 100, it is necessary to consider the balance. For example, the support rigidity by the rotation links 100 is balanced between one end side and the other end side in the width direction of the vehicle seat. It is desirable that
Further, with respect to the arrangement positions of the plurality of rotation links 100, the degree of freedom of arrangement is ensured while reducing the size of the vehicle seat in the stored state, and further, interference between the rotation links 100 or rotation links. It is necessary to set the position to suppress interference between 100 and other members.

In addition, it is desired that the components of the vehicle be resource-saving for the environment and lightened to improve fuel efficiency. On the other hand, the rotation link 100 operates in accordance with the storage and removal of the vehicle seat, and high rigidity is required for extending the life.

Also, the cushion frame that is the skeleton of the seat cushion is usually a pair of left and right side frames, a front connecting member that connects the front ends of the left and right side frames, and a rod-like connecting pipe that connects the rear ends of the side frames. And a pan frame constructed between the upper surfaces of the front end portions of the side frames. Since the pan frame is provided, the rigidity of the seat cushion can be maintained.
At this time, since the pan frame covers from the front end of the cushion frame to the vicinity of the center, there is a possibility that the design of the mechanism for moving the vehicle seat between the use position and the storage position may be limited, and the movement of the seat There has been a demand for suppressing the interference with members constituting the mechanism and increasing the degree of freedom in designing the seat storage mechanism.

Some vehicle seats that can be stored on the vehicle body floor side are connected to a seat cushion and the vehicle body floor and attached with a gas spring that rotates with respect to the vehicle body floor. The gas spring is configured so that an urging force is always applied to the seat cushion side during the seat storing operation, and supports the seat cushion from below and assists in the seat storing operation.
At this time, the seating stability of the seat is improved by urging the seat cushion upward when the gas spring is in the use position, but the seat is stored using the gas spring at the storage position. No consideration was given to improving stability.
Therefore, there has been a demand for a vehicle seat that has a simple structure and has improved seat storage stability in the seat storage state.

In a vehicle seat that can be stored, the space above the stored seat is used as a luggage storage space. Therefore, by attaching the pan frame to the seat back frame that forms a part of the floor surface in the vehicle so as to fill the recessed portion for storage in the stowed state, the seat back has the rigidity necessary for the stowed state. Has been granted. And the linear member which connects the right-and-left frame part of the back frame main body formed in the rectangular frame shape is provided in three places between the upper and lower frame parts, and the rigidity of the seat back in the stored state is further improved.
At this time, since the linear member only extends in the horizontal direction between the upper and lower frame portions, it has been desired to further improve the rigidity of the seat back.

Then, this invention is made | formed in view of said problem, The objective is to provide the vehicle seat which can make a stowed state more compact, suppressing the interference of rotation links. is there.
Another object of the present invention is to provide a vehicle seat in which a plurality of rotation links are arranged in a balanced manner so that the support rigidity by the rotation links is balanced.
Another object of the present invention is to secure the degree of freedom of the arrangement of the rotation links while reducing the size of the vehicle seat in the stored state, and to prevent interference between the rotation links and the rotation links and other members. It is providing the vehicle seat which can suppress interference between these.
Another object of the present invention is to reduce the resource and weight of the link structure for storing sheets and to increase the rigidity thereof.
Another object of the present invention is a vehicle seat that can be stored in a storage position formed on a vehicle body floor, wherein the pan frame of the seat cushion operates as a separate member used for storing and unfolding the vehicle seat. The object is to provide a vehicle seat that does not interfere.
Another object of the present invention is to provide a vehicle seat that can be stored on the vehicle body floor side with a simple structure and improved seat storage stability.
Another object of the present invention is to provide a vehicular seat that can be stored and has a simple configuration and further improved rigidity of a seat back.

The subject is a vehicle seat that can be stored in a storage position formed on a vehicle body floor, and is connected to a seat cushion provided in the vehicle seat, and the vehicle body floor is moved to move the seat cushion to the storage position. A first link, a second link, and a third link that rotate with respect to the vehicle seat, wherein the first link, the second link, and the third link are arranged at different positions in the width direction of the vehicle seat. In addition, the third link is solved by being arranged at a position different from the first link and the second link in the front-rear direction of the vehicle seat.
In the vehicle seat, since the first link, the second link, and the third link are arranged at different positions in the width direction of the vehicle seat, interference between the rotating links is suppressed. And in the said vehicle seat, the 3rd link is arrange | positioned in the position different from a 1st link and a 2nd link in the front-back direction of a vehicle seat. By shifting the position of one rotation link from the position of the remaining two rotation links in this way, the rotation link can be arranged by effectively utilizing the space in the vehicle. It becomes possible to make it compact.

In the vehicle seat, the third link is disposed at a position closer to the second link among the first link and the second link in the width direction. It is preferable that at least one of the length in the direction, the length in the width direction, and the cross-sectional secondary moment is larger than the second link.
In the above configuration, the support rigidity by the rotation link is balanced by arranging the third link so as to be closer to the second link among the first link having a larger size and the second link having a smaller size. Thus, it is possible to arrange a plurality of rotation links in a balanced manner.

In the above vehicle seat, the arrangement position of the first link may be closer to the center of the vehicle seat in the width direction than the arrangement position of the second link.
As described above, the first link is larger than the second link. Therefore, when the first link is arranged on the end side of the vehicle seat, a device located on the side of the vehicle seat (for example, for adjacent vehicles). Sheet). On the other hand, if the first link is disposed at a position closer to the center of the vehicle seat, it is possible to suppress interference between the first link and a device located beside the vehicle seat.

Moreover, in the said vehicle seat, the connection part which connects between the said 1st link and the said 2nd link is good. With this configuration, the rigidity of the second link is improved.
Furthermore, the said vehicle seat WHEREIN: The said connection part is good in a part of said 2nd link. With this configuration, the first link and the second link can be connected without increasing the number of components.

In the vehicle seat, the first link is disposed on one end side of the seat cushion in the width direction, and the second link is disposed on the other end side of the seat cushion in the width direction. The arrangement position of the third link may be closer to the side wall of the vehicle on which the vehicle seat is mounted in the width direction than the arrangement positions of the first link and the second link.
As described above, since the first link and the second link are also arranged on the side wall side (that is, the outside) of the vehicle, the third link is not restricted by the first link or the second link. The arrangement position can be determined freely. And in the structure by which a connection part is provided between a 1st link and a 2nd link, if a 3rd link is arrange | positioned between both links, a 3rd link may interfere with a connection part. In contrast, if the first link and the second link are also arranged on the side wall side of the vehicle, interference between the third link and the connecting portion can be suppressed.

In the vehicle seat, the third link is a guide link that guides the seat cushion so that the seat cushion moves to the storage position along a predetermined track, and the guide link in the front-rear direction. It is preferable that an urging member that rotates with respect to the vehicle body floor together with the guide link while urging the seat cushion is provided at a position aligned with the vehicle body floor.
With the above configuration, when the seat cushion moves toward the storage position while being guided by the guide link, a biasing force acts on the seat cushion from the biasing member that rotates together with the guide link. As a result, the guide link can smoothly move the seat cushion to the storage position while being assisted by the urging force of the urging member.

The vehicle seat includes a support member that is disposed between the vehicle body floor and the seat cushion and supports the seat cushion, and the two vehicle seats are arranged in the width direction. When provided, the first link, the second link, the third link, and the support member are provided for each of the vehicle seats, and at least one of the two vehicle seats is used for the vehicle. The seat includes the support member positioned between the first link and the second link in the width direction, and the support member positioned between the first links of the vehicle seats. good.
If it is the above structure, since a support member is located between the 1st link and the 2nd link in the width direction of a vehicle seat, it becomes possible to control interference with a support member and each rotation link.
And since at least one vehicle seat is provided with the support member located between 1st links according to vehicle seat other than the support member located between the 1st link and the 2nd link, it is for vehicles. The support state of the sheet is further stabilized. Furthermore, since the support member positioned between the first links for each vehicle seat is disposed at a position where interference with the first link is suppressed, each vehicle seat is stored separately. It becomes difficult to become an obstacle.

In the vehicle seat, the first link may have a closed cross-sectional structure.
If it is the above structure, it will become resource saving, weight reduction, and high rigidity.

In the vehicle seat, a seat belt anchor may be fixed to the first link.
If it is the above structure, the seatbelt anchor is fixed to the vehicle seat by the seatbelt anchor being attached to the first link having a closed structure with high rigidity.

The vehicle seat may further include a connecting portion that connects portions of the first link and the second link on one end side in the extending direction, and at least a part of the connecting portion includes the first link. It is good to be fixed in the state accommodated in the edge part by the side of the above-mentioned body floor.
If it is the above structure, both rigidity will improve by connecting a 1st link and a 2nd link. And the connection part of a 1st connection part and a 1st link becomes compact.

Further, in the above vehicle seat, the seat cushion includes a frame-shaped seat cushion frame and a pan frame provided at a front portion of a region defined by the seat cushion frame, and one end side is fixed to the seat cushion for use. A support leg for supporting the seat cushion at a position and being unable to support the seat cushion at the storage position, wherein the pan frame connects the support leg to the seat cushion frame. It should be placed away from the part.
If it is the above structure, it can suppress that a pan frame interferes with the support leg attaching part which connects the support leg which cannot support a seat cushion in a storage position while supporting a seat cushion in a use position. Since the rigidity of the front portion of the seat cushion frame can be secured while suppressing interference with the device related to the rotation of the support legs, a vehicle seat that can be stored with a highly rigid seat cushion frame can be realized.

The vehicle seat further includes an urging member that has one end attached to the seat cushion, the other end connected to the vehicle body floor, and urges the seat cushion downward or horizontally when in the storage position. Good to be.
With the above configuration, if the urging member for urging the seat cushion downward is provided particularly at the storage position, the ratchet of the seat body constituting the seat body is suppressed and stable at the storage position. Can be made.

Further, in the vehicle seat, a pair of vertical frame portions extending along a vertical direction in a side portion of the vehicle seat, and a pair of horizontal frame portions respectively connecting an upper end side and a lower end side of the pair of vertical frame portions. A seat back frame, a pan frame fixed to the seat back frame and extending to an area defined by the seat back frame, and fixed to one surface of the pan frame, the pair of vertical frames A linear member constructed so as to connect the frame portion and an operation movement by an operator for moving the vehicle seat between the use position and the storage position of the vehicle seat are transmitted. An input unit; and a transmission device that transmits the movement transmitted to the input unit to a moving device that moves the vehicle seat between the use position and the storage position. Location is good in contact with the linear member.
With the above configuration, since the transmission device is in contact with the linear member, the rigidity of the linear member is improved, and as a result, the rigidity of the pan frame is improved.

ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to make more compact the vehicle seat of a accommodated state, suppressing interference of rotation links.
According to the present invention, it is possible to arrange a plurality of rotation links in a balanced manner so that the support rigidity by the rotation links is balanced.
ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to suppress interference with the apparatus located in the side of a 1st link and a vehicle seat.
According to the present invention, the rigidity of the second link is improved.
According to the present invention, it is possible to connect the first link and the second link without increasing the number of parts.
ADVANTAGE OF THE INVENTION According to this invention, while improving the freedom degree of the arrangement position of a 3rd link, it becomes possible to suppress interference with the connection part and 3rd link which connect between the 1st link and the 2nd link. .
According to the present invention, the guide link is assisted by the urging force of the urging member, and the seat cushion can be smoothly moved to the storage position.
According to the present invention, the support state of the vehicle seat is further stabilized, and the support member positioned between the first links for each vehicle seat is prevented from interfering with the first link. It becomes difficult to become an obstacle at the time of storing the seat for the individual.

According to the present invention, it is possible to save the resource and weight of the first link and increase the rigidity.
According to the present invention, the fixation of the seat belt anchor to the vehicle seat can be stabilized.
According to the present invention, the rigidity of both is improved by connecting the first link and the second link, and the connecting portion between the first connecting portion and the first link becomes compact.

ADVANTAGE OF THE INVENTION According to this invention, it can suppress that a pan frame supports a seat cushion in a use position, and interferes with the support leg attachment part which connects the support leg which cannot support a seat cushion in a stowed position. Since the rigidity of the front portion of the seat cushion frame can be secured while suppressing interference with the device related to the rotation of the support legs, a vehicle seat that can be stored with a highly rigid seat cushion frame can be realized.
According to the present invention, rattling of the seat cushion constituting the seat body can be suppressed and stabilized at the storage position.
According to the present invention, since the transmission device is in contact with the linear member, the rigidity of the linear member is improved, and as a result, the rigidity of the pan frame is improved.

It is an external view of the vehicle seat of the present invention. It is a figure which shows a mode that a vehicle seat is accommodated (the 1). It is a figure which shows a mode that a vehicle seat is accommodated (the 2). It is a figure which shows a mode that a vehicle seat is accommodated (the 3). It is a figure which shows a mode that a vehicle seat is accommodated (the 4). It is a schematic diagram explaining the movement of a sheet storage mechanism (part 1). FIG. 10 is a schematic diagram for explaining the movement of the sheet storage mechanism (part 2). FIG. 10 is a schematic diagram for explaining the movement of the sheet storage mechanism (No. 3). It is the rear view which looked at the internal mechanism of the vehicle seat from back. It is the perspective view which looked at the sheet storage mechanism from diagonally backward. It is a perspective view of the fixing bracket of the sheet storage mechanism. It is a plane explanatory view of a seat cushion frame. It is the perspective view which looked at the sheet | seat accommodation mechanism from diagonally backward at another angle. It is the perspective view which looked at the seat back frame from diagonally forward. It is the perspective view which looked at the seat back frame from diagonally backward. It is a front view of a seat back frame. It is the perspective view which looked at the seat back frame from diagonally forward. It is a side view of a sheet storage mechanism. It is a rear view of a sheet storage mechanism. It is a perspective view which shows the surroundings of the 3rd locking mechanism provided in the inner side link. It is a rear view which shows the welding part of an inner side link and an outer side link. It is a side view which shows the welding part of an inner side link and an outer side link. It is a schematic cross section of each rotation link. FIG. 20 is a rear view showing a modified example of the sheet storage mechanism and corresponding to FIG. 19. It is explanatory drawing which shows the state which the 1st locking mechanism of the foot link locked. It is explanatory drawing which shows the state which the 1st locking mechanism unlocked and became impossible to lock. It is explanatory drawing which shows the state in which the 1st locking mechanism became lockable. It is explanatory drawing which shows the state which the 1st locking mechanism relocked. It is a schematic plan view of a striker. FIG. 29A is an explanatory view showing the engageable position where the second lock mechanism of the seat cushion can be locked, and FIG. 29B shows the non-engageable position where the second lock mechanism cannot be locked. It is explanatory drawing. It is a side view which shows the structure of the conventional vehicle seat.

<< Schematic Configuration of Vehicle Seat According to One Embodiment of the Present Invention >>
Hereinafter, the vehicle seat according to the present embodiment will be described with reference to the drawings.
In the following description, the front-rear direction means the front-rear direction (full length direction) of the vehicle, and corresponds to the front-rear direction of the vehicle seat. The width direction means the left-right direction (horizontal width direction) of the vehicle and corresponds to the width direction of the vehicle seat.
Further, the positions, postures, and the like of the respective members described below are the positions, postures, and the like when the vehicle seat is in a use state, that is, a seated state, unless otherwise specified.

The vehicle seat S according to the present embodiment constitutes a rear seat of the vehicle, and in the present embodiment, two seats are arranged side by side in the width direction as shown in FIG. The two sheets S arranged in the width direction have different widths (lengths in the width direction). In the present embodiment, the width ratio is set to about 4: 6. However, the present invention is not limited to this, and the width ratio can be arbitrarily set, and may be, for example, 5: 5.

The two seats S arranged in the width direction are each provided with a seating portion S1, and the seating portion S1 includes a seat cushion 1 on which an occupant is seated, a seat back 2 that supports the occupant from the back side, and a headrest 3 that supports the occupant's head. Become. Further, as shown in FIG. 2 and the like, a recessed storage space T1 formed in the vehicle body floor T is provided behind each seat S. The interior of the storage space T1 corresponds to the storage position, and each sheet S is configured to be stored in the storage space T1.

An outline of the storing operation of the seat S will be described. When the seat S is in a state before storing, that is, in the seatable state shown in FIG. 2, when the occupant pulls the operation strap St shown in FIG. Then, the seating portion S1 is folded. After that, the folded seat S1 moves in the direction of sinking backward as shown in FIGS. Finally, as shown in FIG. 5, the entire sheet S is stored in the storage space T1.

The seat S includes a seat storage mechanism 4 below the seating portion S1 in order to realize the above-described storage operation. The seat storage mechanism 4 is a mechanism for moving the seat S1 toward the storage space T1, and includes a foot link 10 and a rotation link 20 illustrated in FIG. 2 as main components.

The foot link 10 corresponds to a support member, is disposed between the vehicle body floor T and the seat cushion 1, and supports the seat portion S 1 including the seat cushion 1. The foot link 10 includes a first lock mechanism 11 illustrated in FIG. 10 or the like at a lower end portion, and engages with a striker T2 illustrated in FIG. Since the foot link 10 is engaged with the striker T2, the seat portion S1 is locked in a state where it is positioned at the seatable position. On the contrary, when the engagement state between the foot link 10 and the striker T2 is released, the entire seat S including the seating portion S1 becomes movable and can move toward the storage space T1.

The engagement state between the foot link 10 and the striker T2 is released by a switching mechanism (not shown), and more specifically, when the seating portion S1 assumes a predetermined posture, the switching mechanism more specifically tilts the seat back 2 forward. When it reaches a predetermined position, it operates.
The configuration of the foot link 10 will be described in detail later.

The pivot link 20 is a long member, and one end portion (upper end portion) in the extending direction forms the seat cushion 1, more specifically, the seat cushion frame shown in FIG. It is connected to 1a. Further, the other end portion (lower end portion) in the extending direction of the rotation link 20 is pivotally supported with respect to the vehicle body floor T. Then, in a state where the engagement state between the foot link 10 and the striker T2 is released, the seating portion S1 moves toward the storage space T1 when the rotation link 20 is rotated to tilt backward. . That is, the rotation link 20 rotates with respect to the vehicle body floor T in order to move the seating portion S1 between the seatable position and the storage position.
The configuration of the rotation link 20 will be described in detail later.

Hereinafter, an operation example of the sheet storage mechanism 4 will be outlined with reference to FIGS. 6 to 8, each part of the seat storage mechanism 4 and the seating part S1 is schematically shown in a straight line. Also, in each of FIGS. 6 to 8, a black circle indicates the center of rotation.
First, when the occupant pulls the operation strap St shown in FIG. 1 while the seat S is in the seatable state, the seat back 2 tilts forward as described above. That is, the seat back 2 rotates relative to the seat cushion 1 in the direction indicated by the symbol d1 in FIG.

When the angle formed by the seat back 2 and the seat cushion 1 (the angle indicated by the symbol α in FIG. 6) is reduced to a predetermined angle, a switching mechanism (not shown) is operated in conjunction with this, and the vehicle body floor The engagement state between the striker T2 attached on T and the foot link 10 is released. At this time, as shown in FIG. 7, the front end portion of the seat cushion 1 is lifted somewhat upward by a biasing force of a piston damper 24 described later.

Further, when the engagement state between the striker T2 and the foot link 10 is released, as described above, the seat portion S1 becomes movable, and when the rotary link 20 tilts backward in this state, the seat in the folded state is obtained. The part S1 moves toward the storage space T1. That is, when the pivot link 20 pivots in the direction indicated by the symbol d2 in FIG. 7 with respect to the vehicle body floor T, the seat portion S1 descends while turning back.

Also, the seating part S1 itself can rotate in the direction indicated by the symbol d3 with respect to the rotation link 20. As a result, when the seat portion S1 descends while turning back, the angle formed by the seat cushion 1 and the rotation link 20 (the angle indicated by symbol β in FIG. 7) is simultaneously reduced. Move.

Furthermore, the rotation link 20 and the foot link 10 are connected by a relay member 25 shown in FIG. 10, FIG. Since the relay member 25 is interposed between the rotation link 20 and the foot link 10, the rotation of the rotation link 20 is transmitted to the foot link 10. As a result, the foot link 10 turns so as to be folded when the turning link 20 tilts backward. That is, the foot link 10 is rotated in the direction indicated by the symbol d4 in FIG. 7 in conjunction with the backward tilting operation of the rotation link 20, and the foot link 10 and the seat cushion 1 are moved as the rotation operation proceeds. Is smaller (the angle indicated by the symbol γ in FIG. 7).

Then, when the pivoting link 20 finally tilts backward until it reaches a predetermined position (specifically, the position of the pivoting link 20 illustrated in FIG. 8), the folded seating portion S1 and The foot link 10 is stored in the storage space T1 together with the rotation link 20. At this time, the foot link 10 and the rotation link 20 are in a state of being accommodated inside the seat cushion 1 (more specifically, the seat cushion frame 1a) in the width direction.

<< Configuration of seat cushion frame >>
Next, the configuration of the seat cushion frame 1a will be described in detail with reference to FIGS.
The seat cushion 1 of FIG. 1 is configured by placing a known cushion pad on a seat cushion frame 1a shown in FIGS. 10, 12, and 13 and further covering with a known skin material.
The seat cushion frame 1a is a pipe-shaped front that connects the inner side frame 31 and the door-side side frame 32 that are spaced apart from each other and extend in the front-rear direction, and the front ends of the inner side frame 31 and the door-side side frame 32. The frame 33, the inner side frame 31, and the rear frame 34 connecting the rear ends of the door side side frame 32, are configured in a frame shape.

The inner side frame 31 and the door side frame 32 are formed by pressing a sheet metal, and are substantially plate bodies that are wider at the rear than the front and curved so that the central portion protrudes downward. The door-side side frame 32 is formed shorter than the inner side frame 31 in the front-rear direction.
The inner side frame 31 and the door side side frame 32 are disposed on the vehicle interior side and the vehicle exterior side of the seat S, respectively.

The front frame 33 is formed of a substantially L-shaped body in which a metal pipe is bent. As shown in FIGS. 10, 12, and 13, the front frame 33 is bent rearward at an obtuse angle from the front portion 33 a. It is comprised from the inclination part 33b and the side part 33c bent by the obtuse angle further toward the back from the inclination part 33b.
On the rear end side of the side portion 33c of the front frame 33, an auxiliary frame 39, which is formed by pressing a sheet metal to have a substantially C-shaped cross section and arranged so as to extend in the front-rear direction of the seat, is fixed by welding. The auxiliary frame 39 is composed of a central surface formed in a substantially flat surface and upper and lower flange surfaces whose upper and lower ends protrude toward the vehicle door side. The central surface and a pair of flange surfaces Thus, the rear end side of the front frame 33 is wrapped and fixed.
The rear end of the auxiliary frame 39 is fixed to the rear frame 34.

A fixing bracket 35 for attaching the foot link 10 is fixed to the front portion 33a.
The fixed bracket 35 is formed by bending a metal plate into a substantially U shape. As shown in FIGS. 10 to 11, the fixing bracket 35 has a body portion 35a having a U-shape in which the front ends of a pair of

horizontal plates

35b and 35c extending in the front-rear direction in the vertical direction are connected by a front plate 35d. A rotating shaft 35g fixed to the lower ends of the

horizontal plates

35b and 35c of the main body portion 35a,

flange portions

35e and 35f bent from the upper ends of the

horizontal plates

35b and 35c and extending outward in the width direction, It is equipped with.

By supporting the upper end portion of the foot link 10 on the rotation shaft 35g, the foot link 10 is configured to be rotatable with respect to the seat cushion frame 1a.
As shown in FIGS. 10 to 11, the

flange portions

35e and 35f are formed within a range in the height direction of the front portion 33a so that the upper surfaces of the

flange portions

35e and 35f are substantially continuous with the front portion 33a. . Further, the

flange portions

35e and 35f are formed in a substantially trapezoidal shape so that the rear side is narrower than the front side, and the end on the outer side in the width direction is located on the side of the

horizontal plates

35b and 35c.
Moreover, the corner | angular part of the width direction outer side of the front and back of the

flange parts

35e and 35f becomes R shape.

A pan frame 40 is provided at the front portion of the seat cushion frame 1a.
The pan frame 40 is constructed between the inner side frame 31 and the front frame 33.
The pan frame 40 is made of a substantially metal plate, and has a laterally extending portion 41 extending in the left-right direction with an end 41a on the outer side in the width direction fixed to the side portion 33c of the front frame 33; The

end portions

42a and 42b of the front frame 33 are fixed to the front portion 33a of the front frame 33 and the inner side frame 31, respectively, and a front-rear extension portion 42 extending in the front-rear direction is substantially continuous and integrally formed on the rear inner side. It consists of a substantially L-shaped plate.
Three locking holes 43 for locking the three S springs 36 installed between the rear frame 34 and the rear frame 34 are provided in the rear portion of the laterally extending portion 41.

A region surrounded by the L-shaped left-right extending portion 41 and the front-rear extending portion 42 is a notch 44, and the region of the notch 44, that is, the left-right extending portion 41, front-rear A fixing bracket 35 is provided in a region surrounded by the direction extending portion 42, the front portion 33a, and the inclined portion 33b.
The part where the left-right direction extension part 41 and the front-back direction extension part 42 continue is as a hypotenuse 47 whose side on the notch part 44 side is inclined with respect to the left-right direction extension part 41 and the front-rear direction extension part 42. Is formed.

Further, the front-rear direction extending portion 42 is fixed to the front frame 33 and the inner side frame 31 at the

end portions

42 a and 42 b in front of the center, but the rear of the end portion 42 b has a rectangular shape at the notch portion 45. In the region of the notch portion 45, the front-rear direction extending portion 42 is separated from the inner side frame 31.
The cutout portion 45 is an area where the third lock mechanism 21c of the rotation link 20 is located when the sheet S is in the storage state. By providing the cutout portion 45, the third lock mechanism 45 is provided in the storage state. Interference with the mechanism 21c is suppressed.
The front part of the part from the left-right direction extending part 41 to the front-rear direction extending part 42 through the oblique side 47 and the end part 44a in the seat outer direction are bent downward and become lower than other parts of the pan frame 40. It is formed as follows. The end 44 a is a portion along the notch 44.
In the inner front end portion of the front-rear direction extending portion 42, a region between the end portion 42a and the end portion 42b has a corner portion that is cut into a substantially rectangular shape, and a notch portion 46 is formed.

As shown in FIGS. 10, 12, and 13, there is a difference between the position slightly inside the vehicle in the width direction from the fixing bracket 35 of the front portion 33 a of the front frame 33 to the door side frame 32. One wire member 37 is provided.
The first wire member 37 is made of an integral linear member made of steel, and has a front fixing portion 37a that is welded and fixed to the front portion 33a of the front frame 33, and a slope that is welded and fixed to the inclined portion 33b of the front frame 33. A portion fixing portion 37c, a frame fixing portion 37e fixed to the door side frame 32 by welding, a front portion 37b extending between the front fixing portion 37a and the inclined portion fixing portion 37c, an inclined portion fixing portion 37c and the frame And a side portion 37d extending between the fixing portion 37e.

The front fixing portion 37a and the inclined portion fixing portion 37c are attached to the front diagonally upper surface of the front portion 33a of the front frame 33 and the front diagonally upper surface of the inclined portion 33b.
The front portion 37b of the first wire member 37 bends obliquely forward from the front fixing portion 37a, bends again, and includes a portion parallel to the front portion 33a of the front frame 33, and from a portion parallel to the front portion 33a. The side is bent obliquely rearward and extends in contact with the inclined portion 33b of the front frame 33.
An inclined portion fixing portion 37c is provided at a portion in contact with the inclined portion 33b.
The frame fixing portion 37e is attached to the side surface of the door side side frame 32.

The side portion 37 d of the first wire member 37 extends in a direction along the inclined portion 33 b of the front frame 33 and protrudes outward in the width direction from the front frame 33 and the door side side frame 32. After being bent vertically inward at the position outside the door-side side frame 32 and extending toward the door-side side frame 32, it is bent again vertically at the position in contact with the side surface of the door-side side frame 32, and the door-side side At a position extending along the side surface of the frame 32, the frame fixing portion 37 e is attached to the side surface of the door side side frame 32.
The first wire member 37 is provided along a portion of the front frame 33 adjacent to the notch 44 and improves the support rigidity of the front frame 33.
As shown in FIG. 12, a linear second wire member 38 is provided on the front surface of the front portion 33 a of the front frame 33 along the portion where the fixing bracket 35 is provided.

<< Configuration of seat back frame >>
Next, the configuration of the seat back frame 2a that forms the skeleton of the seat back 2 will be described in detail with reference to FIGS. 9 and 14 to 17. FIG.
The seat back 2 in FIG. 1 is configured by placing a known cushion pad on a seat back frame 2a shown in FIGS. 14 to 16 and further covering with a known skin material.
The seat back frame 2 a is a rectangular shape formed by a frame member 51 that forms an outer shape of the seat back 2, side frames 54 and 55 that extend in the vertical direction along the side of the frame member 51, and the frame member 51. A pan frame 60 stretched so as to close the region is a main component.
The frame member 51 is formed of a frame-like body formed by bending a metal pipe and having a substantially rectangular shape. The frame member 51 includes an inner frame portion 51i and an outer frame portion 51o as vertical frame portions that extend in the vertical direction inside and outside the vehicle. And an upper frame portion 51a and a lower frame portion 51b as horizontal frame portions that bridge the upper and lower ends of the inner frame portion 51i and the outer frame portion 51o.

The vehicle outer end portion of the upper frame portion 51a is bent obliquely downward to form an upper outer inclined portion 51c extending obliquely with respect to the upper frame portion 51a and the outer frame portion 51o. Further, the vehicle inner end portion of the upper frame portion 51a is bent obliquely downward at an angle smaller than that of the upper and outer inclined portions 51c, and the upper inner inclined portion 51d extends obliquely with respect to the upper frame portion 51a and the inner frame portion 51i. Is formed.
An inner end portion of the lower frame portion 51b is bent obliquely upward to form a lower inner inclined portion 51e extending obliquely with respect to the lower frame portion 51b and the inner frame portion 51i.

The upper frame portion 51a is crushed at two locations in the length direction, and a pair of brackets 52 for inserting the pair of headrest pillars 3a are welded and fixed to the crushed positions. As shown in FIG. 14, the headrest pillar 3a extends to a position where the lower inner inclined portion 51e is provided in the seat vertical direction.
In addition, a flat portion 51f that is crushed and has a substantially flat front surface is formed at a position near the upper frame portion 51a of the upper inner inclined portion 51d, and a thin pipe is formed on the upper surface of the flat portion 51f. An elliptical annular body 53 bent into a substantially elliptical annular shape is fixed by welding.

The inner frame portion 51i and the outer frame portion 51o are disposed on the vehicle inner side and the vehicle outer side of the seat back 2, respectively.
Side frames 54 and 55 are welded and fixed to the sheet outer end portions of the inner frame portion 51i and the outer frame portion 51o along the inner frame portion 51i and the outer frame portion 51o, respectively. The side frame 54 is located inside the vehicle and the side frame 55 is located outside the vehicle.
The side frames 54 and 55 are formed by pressing a sheet metal, and plate-

like side portions

54a and 55a extending in the front-rear direction of the sheet and front ends of the

side portions

54a and 55a are bent toward the inside of the seat. The

front edge portions

54b and 55b and the

rear edge portions

54c and 55c whose rear ends are bent inward of the seat are provided. The

front edge portions

54b and 55b and the

side portions

54a and 55a are respectively provided. And the

rear edge portions

54c and 55c are arranged so as to wrap around the outer surfaces of the inner frame portion 51i and the outer frame portion 51o.
As shown in FIGS. 14 to 16, the

rear edge portions

54c and 55c are provided with substantially rectangular projecting portions 54cu, 54cl, 55cu and 55cl projecting upward and downward, respectively, toward the inside of the seat. The overhang portions 54cu, 54cl, 55cu, and 55cl are sandwiched between the inner frame portion 51i, the outer frame portion 51o, and the pan frame 60, and are welded and fixed to the inner frame portion 51i, the outer frame portion 51o, and the pan frame 60, respectively. Yes.

Further, the lower ends of the side frames 54 and 55 extend below the frame member 51, and a shaft hole (not shown) is formed at a position below the frame member 51. The shaft hole (not shown) is provided with respect to the seat cushion 1 when the seat back 2 is folded with respect to the seat cushion 1 when the seat S is stored and when the angle of the seat back 2 with respect to the seat cushion 1 is changed. A rotation shaft 56 for rotating the seat back 2 is attached.

As shown in FIGS. 15 and 16, a reclining unit L as a reclining device is fixed to a shaft hole (not shown) of the side portion 55a of the side frame 55 outside the vehicle so as to protrude toward the outside of the seat. Yes. The reclining unit L is a device for changing the angle of the seat back 2 with respect to the seat cushion 1.
As shown in FIGS. 14 to 16, a rigidity improving member 57 is welded and fixed to the outer surface of the side portion 55a of the side frame 55 on the vehicle outer side. The rigidity improving member 57 is formed by bending a long single metallic wire into a substantially C shape, and the upper end 57u is welded and fixed near the upper end of the outer surface of the side portion 55a, and the lower end 57l is The side portion 55a is fixed at a position closer to the lower center of the outer surface. In the rigidity improving member 57, a protruding portion 57a between the upper end 57u and the lower end 571 projects vertically from the side portion 55a toward the outside in the left-right direction of the seat as shown in FIG.
The projecting width of the projecting portion 57a from the side portion 55a is slightly smaller than the projecting width of the reclining unit L from the side portion 55a. It is arranged slightly on the left and right inner sides of the seat on the outer side in the left and right direction.
The side frame 55 outside the seat is sandwiched between the rigidity improving member 57 and the outer frame portion 51o.

The pan frame 60 is made of a substantially metal plate, has an outer shape that is substantially the same as the substantially rectangular shape formed by the frame member 51, and is stretched so as to close the rear surface of the frame member 51. .
The upper portion of the pan frame 60 is a portion slightly above the upper ends of the side frames 54 and 55, and is a portion of the frame member 51 from the upper outer inclined portion 51c through the upper frame portion 51a to the upper inner inclined portion 51d. It is fixed by welding.
As shown in FIGS. 15 and 16, the left and right ends of the pan frame 60 are welded and fixed to the rear surfaces of the projecting portions 54 cu, 54 cl, 55 cu, and 55 cl of the

rear edge portions

54 c and 55 c of the side frames 54 and 55, respectively. Has been.

The lower end side of the pan frame 60 is curved from the rear of the seat toward the front of the seat so as to follow the shape of the rear surface of the cylindrical lower frame portion 51b, and is fixed to the rear surface of the lower frame portion 51b by welding. Yes.
The lower end side of the pan frame 60 extends downward again from the front lower end welded and fixed to the lower frame portion 51 b, and the lower end of the pan frame 60 follows the shape of the rear surface of the columnar rotation shaft 56. Is bent toward the front of the seat, and is fixed to the rear surface of the rotating shaft 56 by welding. On the lower end side of the pan frame 60, the bent portion from the rear of the seat toward the front of the seat is a bent portion of the folded portion of the claims, and the portion of the bent portion extending toward the front of the seat is claimed. Corresponds to the extension of the folded part of the range.
The lower end of the pan frame 60 is located in front of the seat with respect to the rotation shaft 56.
In addition, beads 60b are formed at two positions in a part in the sheet width direction at a position continuous with a position welded and fixed to the lower frame portion 51b on the lower end side of the pan frame 60.

A reinforcing upper linear member 61 and a lower linear member 62 are welded and fixed to the front surface of the pan frame 60 so as to bridge the inner frame portion 51i and the outer frame portion 51o.
The upper linear member 61 and the lower linear member 62 are substantially U-shaped in which both ends 61e and 62e of a cylindrical linear metal wire are bent at right angles in the same direction. The

end portions

61e and 62e are welded and fixed to the inner surface of the inner frame portion 51i and the outer frame portion 51o, respectively.
Further, the linear portions between the both end portions are welded and fixed to the front surface of the pan frame 60 at several places.

Both end portions 61e of the upper linear member 61 are welded and fixed to the inner frame portion 51i and the outer frame portion 51o at positions slightly below the upper ends of the side frames 54 and 55.
The left and right side frames 54 and 55 are also welded and fixed to the inner frame portion 51i and the outer frame portion 51o at the same height as the position where both end portions 61e are fixed by welding.
Therefore, the side frames 54 and 55 are welded and fixed to the inner frame portion 51i and the outer frame portion 51o on the outer surface of the seat where the inner surface of the sheet is welded and fixed to the end 61e of the upper linear member 61. Has been.
Further, the upper end 57 u of the rigidity improving member 57 is welded and fixed to the side frame 55 on the inner surface of the side frame 55 on the outer surface of the seat where the inner frame portion 51 i is fixed by welding.
In this way, both the end portions 61e of the upper linear member 61, the side frames 54 and 55, and the upper end 57u of the rigidity improving member 57 are welded and fixed at the same position in the length direction, and the welding fixing position is the same member. Since it is arrange | positioned on the surface inside and outside a sheet | seat, rigidity can be improved.

Further, both end portions 61e of the upper linear member 61 are formed at the outer frame portion 51o, at positions where the projecting portions 54cu, 54cl, 55cu, 55cl of the

rear edge portions

54c, 55c of the side frames 54, 55 are not formed. It is welded to the inner frame portion 51i. Further, both end portions 62e of the lower linear member 62 are formed between the outer frame portion 51o and the inner frame between the upper and lower projecting portions 54cu and 54cl and 55cu and 55cl of the

rear edge portions

54c and 55c of the side frames 54 and 55, respectively. It is welded to the part 51i. Accordingly, interference between the

rear edge portions

54c and 55c of the side frames 54 and 55, the upper linear member 61, and the lower linear member 62 is suppressed.

A transmission device for transmitting the operation of the operation strap St by the occupant to the seat storage mechanism 4 on the front surface of the pan frame 60 at a position between the upper linear member 61 and the lower linear member 62 in the center in the length direction. A movable unit 63 is provided.
As shown in FIG. 16, the movable unit 63 includes a reinforcing plate 64 fixed to the front surface of the pan frame 60, a rotating shaft 65 inserted through a shaft hole provided in the reinforcing plate 64 and the pan frame 60, A long plate-like first arm 66 that can rotate about a shaft 65 and an end of the first arm 66 opposite to the rotation shaft 65 are rotatably connected to the first arm 66. A long second arm 67, an operation strap St attached to the end of the second arm 67 opposite to the first arm, and a cable Cb fixed to the outer surface of the first arm 66 in the vicinity of the rotation shaft 65. And.
As shown in FIG. 16, the second arm 67 is passed through an elliptical annular body 53 fixed to the upper frame portion 51a so that the operation strap St protrudes from the upper end of the seat back 2 as shown in FIG. Has been placed.

When the operation strap St is pulled upward by the occupant, the movable unit 63 moves the second arm 67 upward to rotate the first arm 66 clockwise in the front view of FIG. The sheet storage mechanism 4 is operated by pulling the cable Cb fixed around the rotation shaft 65.
The reinforcing plate 64 has a substantially trapezoidal shape in which the upper side 64u and the lower side 64l extend in the sheet width direction, the upper side 64u is in contact with the lower end of the upper linear member 61, and the lower side 64l is in contact with the upper end of the lower linear member 62. Yes.
In addition, the movable unit 63 is provided in a flat portion 68 where no bead is provided in the pan frame 60, and the pan frame 60 is disposed around the reinforcing plate 64 toward the front of the seat from the flat portion 68. A plurality of beads 69 serving as protruding bead portions are provided.

The upper linear member 61 and the lower linear member 62 intersect the headrest pillar 3a perpendicularly as shown in FIG. The movable unit 63 is disposed at a position sandwiched between the pair of headrest pillars 3a in the seat width direction.

A guide wire member 70 is fixed to the pan frame 60 so as to span between the upper wire member 61 and the lower wire member 62.
The guide wire member 70 has a substantially C-shape in which both end portions 70e of a cylindrical linear metal wire are bent at right angles in the same direction. The upper end portion 70e of the guide linear member 70 is welded and fixed to the front surface of the pan frame 60 so that the lower surface abuts the upper surface of the upper linear member 61, and the lower end portion 70e has a linear upper surface on the lower surface. It is fixed to the front surface of the pan frame 60 by welding so as to contact the lower surface of the member 62.
At this time, each end portion 70e of the guide linear member 70, the upper linear member 61, and the lower linear member 62 may be fixed by welding, an adhesive, or the like, respectively. If comprised in this way, the attachment rigidity of the guide wire-shaped member 70 will improve further.

The linear portion 70s between both ends 70e of the guide linear member 70 has an upper end side and a lower end side in contact with the surface of the upper linear member 61 and the lower linear member 62 on the opposite side of the pan frame 60, A gap corresponding to the thickness of the upper linear member 61 and the lower linear member 62 is arranged between the pan frame 60 and the pan frame 60. That is, the upper linear member 61 and the lower linear member 62 are sandwiched between the pan frame 60 and the linear portion 70 s of the guide linear member 70.
The straight portion 70s is arranged to extend in the vertical direction at substantially the same position as the inner end of the elliptical annular body 53 in the sheet width direction, and when the second arm 67 is attached, 67 serves as a slide guide that slides along.
The first arm 66 is inserted into the gap between the pan frame 60 and the straight portion 70s.

FIG. 17 is a view showing the seat back frame 2a provided on the seat S having a long lateral width among the two seats S constituting the rear seat and having different lateral widths.
In the seat back frame 2a provided on the sheet S having a long lateral width, an auxiliary frame member 51s that bridges the upper frame portion 51a and the lower frame portion 51b is provided, and is sandwiched between the auxiliary frame member 51s and the outer frame portion 51o. The region is the same as that of the seat back frame 2a of the seat S with a short lateral width in FIGS.

<Configuration of sheet storage mechanism>
Next, the configuration of the sheet storage mechanism 4 described above will be described in detail with reference to FIGS. 9 to 10 and FIGS.
As shown in FIG. 9, the seat storage mechanism 4 is provided individually for each of the two seats S constituting the rear seat and having different widths. Here, the sheet storage mechanism 4 provided on the sheet S having a short lateral width and the sheet storage mechanism 4 provided on the sheet S having a long lateral width have some differences such as the number of foot links 10 being different. The general configuration is the same between both mechanisms. Therefore, hereinafter, only the configuration of the sheet storage mechanism 4 for the sheet S having a short width will be described.

The sheet storage mechanism 4 includes a foot link 10 and three rotation links 20 as shown in FIGS. 9 to 10 and 18 to 19. More specifically, the sheet storage mechanism 4 includes an inner link 21, an outer link 22, and a guide link 23 as the three rotation links 20. Further, as shown in FIGS. 9 and 10, the sheet storage mechanism 4 includes a piston damper 24 as an urging member.

The foot link 10 is made of a plate-shaped steel material, and a flange portion 10a is formed by bending both ends thereof to ensure rigidity. As shown in FIG. 19, the foot link 10 includes a first lock mechanism 11 at the lower end, and engages with a striker T 2 attached to the vehicle body floor T. The foot link 10 is connected to the seat cushion frame 1a side in a rotatable state. Details of the first lock mechanism 11 will be described later.

More specifically, as shown in FIG. 18, a fixing bracket 35 for fixing the foot link rotating shaft 10c is welded to the front end portion of the seat cushion 1 (strictly speaking, the seat cushion frame 1a). Attached. An upper end portion of the foot link 10 is supported on the foot link rotating shaft 10 c fixed to the fixing bracket 35. Accordingly, the foot link 10 can go back and forth between the standing position (the position of the foot link 10 illustrated in FIG. 6) and the folding position (the position of the foot link 10 illustrated in FIG. 8).

A coil spring (not shown) is interposed on the foot link rotating shaft 10c. One end of the coil spring is fastened to the rear surface of the foot link 10, and the other end of the coil spring is a seat cushion frame. It is fastened to 1a. Thereby, the foot link 10 is urged | biased by a coil spring so that it may go to a standing position.

On the other hand, one end of the above-described relay member 25 is attached to the foot link 10 so that driving force is transmitted from the rotation link 20 (more specifically, the inner link 21 or the outer link 22). ing. More specifically, when the pivot link 20 pivots in a backward tilting direction, the relay member 25 is utilized from the upper end portion of the foot link 10, strictly speaking, the foot link pivot shaft 10 c by utilizing the pivot operation. Also, the portion located above is pressed forward. As a result, the foot link 10 rotates so as to be folded against the urging force of the coil spring.

As shown in FIG. 9, one foot link 10 is attached to a substantially central portion in the width direction on the sheet S having a small lateral width, whereas the sheet S having a large width direction has an outer side in the width direction and Two foot links 10 are attached, one on the inner side.

The inner link 21 corresponds to a first link, and supports the seat portion S1 when the seat S is in use, and moves the seat portion S1 into the storage space T1 when the seat S is stored.
The outer link 22 corresponds to a second link, and moves the seat portion S1 into the storage space T1 in cooperation with the inner link 21 when the seat S is stored.
Here, the inner link 21 is located on the inner side in the width direction, and the outer link 22 is located on the outer side in the width direction. The outer side in the width direction is the side closer to the side wall of the vehicle on which the seat S is mounted (strictly speaking, the side wall located closer to the seat S), and the inner side in the width direction means the vehicle. This is the side away from the side wall, more specifically the side close to the adjacent sheet S.

The guide link 23 corresponds to a third link, and guides the seat cushion 1 so that the seat cushion 1 moves to the storage space T1 along a predetermined path when the seat S is stored.

The inner link 21, the outer link 22, and the guide link 23 are all connected to the rear end portion of the seat cushion 1 (strictly speaking, the seat cushion frame 1a), and are rotatably supported with respect to the vehicle body floor T. ing.
More specifically, a mounting bracket T3 is attached to the vehicle body floor T (strictly speaking, the front side wall surface of the storage space T1), and the shaft shown in FIGS. 10 and 18 to 19 is mounted on the mounting bracket T3.

Fixtures

26a and 26b are attached by welding.

The inner link rotating shaft 21a is fixed to one of the shaft fixing tools 26a, and the lower end portion of the inner link 21 is supported by the inner link rotating shaft 21a. Further, the outer link rotating shaft 22a and the guide link rotating shaft 23a are fixed to the other shaft fixing tool 26b, and the lower end portion of the outer link 22 is supported by the outer link rotating shaft 22a, and the guide The lower end portion of the link 23 is supported by the guide link rotating shaft 23a.

As described above, each of the inner link 21, the outer link 22, and the guide link 23 rotates to tilt forward or backward about the

corresponding rotation shafts

21a, 22a, 23a.
The positional relationship between the inner link rotation shaft 21a and the outer link rotation shaft 22a is designed such that the shaft centers of the

rotation shafts

21a and 22a coincide in the front-rear direction and the vertical direction. On the other hand, as to the positional relationship between the outer link rotation shaft 22a and the guide link rotation shaft 23a, as shown in FIG. 11, the axis center of the outer link rotation shaft 22a is the guide link rotation shaft 23a. It is designed to be positioned forward and above the axis center.

Further, each of the inner link 21, the outer link 22, and the guide link 23 is connected to the seat cushion 1 so as to be rotatable with respect to the seat cushion 1. More specifically, as shown in FIGS. 10 and 18 to 19, the rear end of the seat cushion 1 (strictly speaking, the seat cushion frame 1a) is used to fix the connecting

shafts

21b, 22b, and 23b.

Fixed brackets

1c and 1d are attached.

The connecting shaft 21b that rotatably supports the upper end portion of the inner link 21 is fixed to one fixing bracket 1c. The other fixed bracket 1d is fixed with a connecting shaft 22b that rotatably supports the upper end portion of the outer link 22, and a connecting shaft 23b that rotatably supports the upper end portion of the guide link 23.

As described above, each of the inner link 21, the outer link 22, and the guide link 23 is rotated relative to the seat cushion 1 by supporting the upper end portions thereof on the connecting

shafts

21b, 22b, and 23b. Is possible. In other words, the seat cushion 1 is rotatable relative to the inner link 21, the outer link 22 and the guide link 23.

<< Configuration of each rotation link >>
Next, the configuration of the inner link 21, the outer link 22, and the guide link 23 will be described.
As shown in FIG. 20, the inner link 21 is made of a substantially rectangular tube-shaped steel material. More specifically, the inner link 21 is combined with a steel plate 21 x bent in a substantially U-shape and a steel plate 21 y (one size larger than the steel plate 21 x). These are joined by a welded portion 21g at a predetermined interval in the extending direction to form a cylinder. That is, the cross section of the inner link 21 (cross section intersecting with the extending direction) is a closed cross section. On the other hand, tongue-shaped projections 21ea are formed at both ends in the extending direction of the steel plate 21x of the inner link 21, and the inner link rotation shaft 21a is attached to one (lower) tongue-shaped projection 21ea. A connecting shaft 21b is attached to the other (upper) tongue-like projection 21ea.

Further, a third lock mechanism 21c shown in FIGS. 10, 18 and 20 is attached to the side wall portion on the inner side in the width direction of the vehicle seat in the steel plate 21y of the inner link 21 so as to face forward. The third lock mechanism 21c is for locking the seat portion S1 in the seatable position, similarly to the first lock mechanism 11 provided in the foot link 10.
Specifically, as shown in FIG. 20, the third lock mechanism 21c is fixed to the inner surface of the steel plate 21x between the welded portions 21g in the vertical direction. Further, the third lock mechanism 21c engages with a striker (not shown) attached to the front wall surface of the storage space T1 in the vehicle body floor T in order to lock the seat portion S1 at the seatable position.
The engagement state between the third lock mechanism 21c and the striker is released at the timing when the engagement state between the first lock mechanism 11 provided on the foot link 10 and the striker T2 is released. As described above, since the third lock mechanism 21c is attached to the front side wall of the inner link 21, the rigidity of the inner link 21 is increased accordingly.

Further, while the first lock mechanism 11 of the foot link 10 is provided downward and engages with the striker T2, the third lock mechanism 21c of the inner link 21 is provided forward and provided with a striker (not shown). Is engaged. Thus, the direction in which the lock mechanism is provided differs between the foot link 10 and the inner link 21. For this reason, when an impact is applied to the vehicle in one direction, a force in the unlocking direction is not applied to either the first lock mechanism 11 or the third lock mechanism 21c, so that the lock is easily maintained, and the seat The posture of S can be kept stable.

Furthermore, as shown in FIG. 19, a seat belt anchor 21d is provided on the inner side wall of the steel plate 21y of the inner link 21 where the third lock mechanism 21c is attached above the third lock mechanism 21c. It is attached. The seat belt anchor 21d fixes a fixing buckle (not shown) of the seat belt, and is composed of two metal plates having insertion holes. The fixing buckle is fixed to the seat belt anchor 21d by bolts passing through holes formed in the two metal plates.
As described above, since the seat belt anchor 21d is attached to the front side wall of the highly rigid inner link 21, the seat belt anchor 21d is stably fixed, and the arrangement does not shift even after aged use.

The outer link 22 is formed by bending a cylindrical metal pipe into a substantially L shape, and the long portion 22 g is provided along the inner link 21. On the other hand, the short portion 22 h of the L-shaped outer link 22 extends toward the inner link 21. And the said lower short part 22h is joined to the extension direction one end part (lower end part) of the inner side link 21 by welding. Thus, between the inner link 21 and the outer link 22, there is provided a connecting portion that connects the

links

21, 22. The connecting portion is a part of the outer link 22, more specifically, the outer link. 22 is constituted by a lower short portion 22h.

Note that one end of the inner link 21 covers the front side, the rear side, and the upper side of the lower short part 22h, and constitutes an accommodation part 21e that accommodates the lower short part 22h. Specifically, the tongue-like projection 21ea of the inner link 21 is disposed along the outer surface of the lower short portion 22h of the outer link 22, and the accommodating portion 21e includes the tongue-like projection 21ea and the lower end of the steel plate 21x. 21eb and a substantially semicircular notch 21ec formed so as to pass through both side surfaces of the steel plate 21y. In the accommodating portion 21e, the tongue-like protrusion 21ea of the steel plate 21x covers the rear side of the lower short portion 22h, the lower end portion 21eb covers the upper side of the lower short portion 22h, and the steel plate 21y formed with the notch 21ec is the lower short portion. The lower short part 22h is accommodated covering the front side of 22h.

Further, as shown in FIGS. 21A and 21B, the edge of the notch 21ec on the two side faces of the steel plate 21x at the lower end of the inner link 21 and the lower edge of the tongue-like protrusion 21ea are at the welded portion. 21f is joined to the lower short part 22h. More specifically, the welded portion 21f at the lower edge of the tongue-shaped protrusion 21ea is between the welded portions 21f on the two side surfaces of the steel plate 21x in the width direction of the sheet S. As described above, the inner link 21 and the outer link 22 are compactly and firmly connected to each other by being welded to each other at the above position while the inner link 21 accommodates the lower short portion 22h. It becomes.

As described above, since the inner link 21 is configured in a closed cross-sectional shape, resources can be saved and costs can be reduced while ensuring rigidity.
In addition, since the inner link 21 is connected by the welded portion 21f in a state where the lower short portion 22h of the outer link 22 is accommodated, it is connected with a compact and high bonding force, and both rigidity is improved. Furthermore, since the lower short part 22h of the outer link 22 is used as a connecting portion (first connecting portion) with the inner link 21, the inner link 21 and the outer link 22 are connected without increasing the number of parts. It becomes possible.

The outer link 22 includes an extension bracket 22i welded to the bent portion as shown in FIG. The extension bracket 22i extends downward, and an outer link rotation shaft 22a is attached to the tip (lower end) thereof.

The guide link 23 is made of an angle-type steel plate and is provided along the long portions 22 g of the inner link 21 and the outer link 22. The guide link 23 has lower rigidity than the inner link 21 and the outer link 22 and does not have sufficient strength to support and convey the seating portion S1. Therefore, as described above, the guide link 23 has only a function of guiding the seat portion S1 toward the storage space T1 along the correct locus when the seat S is stored.

In the present embodiment, the size (thickness) of the inner link 21 is larger than the sizes (thickness) of the outer link 22 and the guide link 23. More specifically, as shown in FIG. 20, the inner link 21 has a hollow square cross section, the outer link 22 has a hollow circular cross section, and the guide link 23 is substantially L-shaped. Having a cross-section. Here, the cross section of each rotation link 20 means a cross section of each rotation link 20 main body (part different from the end supported by the rotation shaft). In this embodiment, as shown in FIG. 20, the inner link 21 is larger than the outer link 22 and the guide link 23 in any of the length in the front-rear direction, the length in the width direction, and the secondary moment of section. ing.

<< Configuration of piston damper >>
The piston damper 24 is a biasing member that applies a biasing force toward the outside in the extending direction. In the present embodiment, as shown in FIG. 2, when the seat S is in use, the seat damper S1 Among them, the seat cushion 1 is urged upward. By providing the piston damper 24, the seat cushion 1 can be satisfactorily held at a predetermined position even when a load on the seated person is applied. In order to exhibit such performance, the upper end portion of the piston damper 24 is fixed to the side wall of the seat cushion frame 1a as shown in FIG.

The piston damper 24 rotates in the same direction as the rotation direction of the rotation link 20 (that is, the inner link 21, the outer link 22, and the guide link 23) when the seat S is stored. Tilt. That is, the piston damper 24 rotates with respect to the vehicle body floor T together with the rotation link 20 while urging the seat cushion 1. For this reason, the lower end of the piston damper 24 is supported by a rotation shaft (not shown). The rotation shaft is fixed to a shaft fixture 26b to which the outer link rotation shaft 22a and the guide link rotation shaft 23a are fixed.
A biasing spring (not shown) is attached to the pivot shaft, and the piston damper 24 is always moved to the storage position side around the pivot shaft by the biasing spring, similarly to the pivot link 20. It is energized.

Further, in the state shown in FIG. 5 in which the seat S is completely stored in the storage space T1, the piston damper 24 is slightly inclined from the horizontal posture, and more specifically, is fixed to the side wall of the seat cushion frame 1a. The end on the closed side is positioned below the rotation axis. The piston damper 24 in such a posture urges the seat cushion frame 1a downward. Thereby, in a state where the seat S is completely stored in the storage space T1, the seat cushion 1 is urged downward by the piston damper 24, so that the storage state can be maintained well.

Further, when the urging force by the piston damper 24 acts upward when the seat S is raised from the state stored in the storage space T1 and returned to the use state, the seat S suddenly jumps up and collides with the operator (occupant). There is a risk of it. On the other hand, in this embodiment, since the urging force of the piston damper 24 acts downward when the seat S is in the retracted state as described above, it is possible to suppress the collision between the seat S and the occupant. Become.

As shown in FIG. 19, the piston damper 24 is disposed at a position facing at least a part of the guide link 23 in the left-right direction. When in the use position, the piston damper 24 is in front of the rotary link 20 as shown in FIG. The seat cushion 2 can be supported at a position closer to the center portion in the front-rear direction of the seat cushion 2.
The piston damper 24 and the guide link 23 are connected to the vehicle body floor using a mounting bracket T3 that connects the outer link 22 and the vehicle body floor.
Further, as shown in FIG. 2, the piston damper 24 is rearwardly inclined at the same inclination angle with respect to the inner link 21 and the outer link 22 and the vehicle body floor in the front-rear direction at the use position.

<< Arrangement of rotating link and piston damper >>
By the way, as described in the section of the problem to be solved by the invention, when a plurality of rotating links 20 are provided as a mechanism for moving the seating portion S1 including the seat cushion 1 to the storage position, these rotations are performed. The position of the moving link 20 needs to be a position that does not interfere with each other and a position where the seat S can be made compact in the stored state.
As for the arrangement position of the rotation links 20, it is necessary to arrange the rotation links 20 in a balanced manner so that the support rigidity by the rotation links 20 is balanced between the one end side and the other end side in the width direction of the sheet S. is there.
As for the arrangement of the rotation link 20, it is also necessary to be a position where interference between the rotation links 20 or interference between the rotation link 20 and other members can be suppressed while ensuring a degree of freedom.

Therefore, in the present embodiment, the arrangement positions of the three rotation links 20 described above are designed to satisfy the above requirements.
If it demonstrates concretely, arrangement | positioning of the rotation link 20 which concerns on this embodiment is asymmetrical seeing from the center of the width direction of the sheet | seat S, as shown in FIG.9 and FIG.19. More specifically, the three rotation links 20 are arranged at different positions in the width direction, and in the order of the guide link 23, the outer link 22, and the inner link 21 from the outer side to the inner side in the width direction. Has been placed. As described above, the rotation links 20 are arranged at positions different from each other in the width direction, whereby interference between the rotation links 20 can be suppressed.

In particular, in this embodiment, the rotation link 20 (that is, the inner link 21) having the largest size (thickness) is arranged on the inner side in the width direction, and the other rotation links (that is, the outer link 22 and the guide link 23). Is arranged outside in the width direction. In other words, the guide link 23 is disposed at a position closer to the outer link 22 among the inner link 21 and the outer link 22 in the width direction. Thereby, it is possible to suppress the rotation link 20 from being biased and arranged on one of the outer side and the inner side in the width direction. If it demonstrates easily, in this embodiment, the guide link 23 is arrange | positioned so that it may become close to the outer link 22 among the inner link 21 with a larger size, and the outer link 22 with a smaller size. As a result, the three rotation links 20 are arranged in a balanced manner. As a result, the support rigidity by the rotation links 20 in the width direction of the sheet S is balanced.

In this embodiment, since the two sheets S are installed side by side in the width direction, the installation space of the rotation link 20 is limited on the inner side in the width direction of the sheet S than on the outer side in the width direction. . For this reason, about the rotation link 20 arrange | positioned inside the width direction of the sheet | seat S, it is necessary to reduce the number of installation and to make the rigidity of the rotation link 20 high correspondingly. For this reason, in the present embodiment, the two rotational links 20 (that is, the outer link 22 and the guide link 23) are arranged on the outer side in the width direction of the sheet S, whereas the width direction of the sheet S is set. Regarding the inside, only one rotation link 20 (that is, the inside link 21) having the largest size is arranged.

In the present embodiment, as shown in FIGS. 9 and 19, the arrangement position of the inner link 21 is closer to the center in the width direction of the sheet S than the arrangement position of the outer link 22. Thereby, it becomes possible to suppress the trouble of the rotation of the inner link 21. More specifically, the size of the inner link 21 is the largest among the three rotation links 20, and when the inner link 21 is arranged on the end side of the sheet S, a device (specifically, a side position of the sheet S) The adjacent sheet S) and the inner link 21 may interfere with each other. For this reason, it is possible to suppress interference between the inner link 21 and the adjacent sheet S by bringing the inner link 21 to the center in the width direction of the sheet S.

Furthermore, in the present embodiment, the inner link 21 and the outer link 22 are arranged at positions that sandwich the above-described foot link 10 in the width direction. In other words, the foot link 10 is located between the inner link 21 and the outer link 22 in the width direction. Accordingly, when the seat S is stored, when the foot link 10 is rotated so as to be folded, the foot link 10 interferes with the inner link 21, the outer link 22, the third lock mechanism 21c, and the seat belt anchor 21d. Can be suppressed.

In this embodiment, as described above, the two foot links 10 are attached to the sheet S having a long lateral width. As shown in FIG. 9, one of the two foot links 10 (outside in the width direction) is between the inner link 21 and the outer link 22. About the other foot link 10 (width direction inner side), it arrange | positions between the inner side link 21 with which the sheet | seat S with a short lateral width is equipped, and the inner side link 21 with which the sheet | seat S with a large lateral width is equipped. Since the two foot links 10 are attached to the sheet S having a long lateral width as described above, the supporting state of the sheet S can be further stabilized. Furthermore, since the foot link 10 located between the inner links 21 for each sheet S is disposed at a position where interference with the inner link 21 is suppressed, there is a problem in storing each sheet S individually. It becomes difficult to become.

And in this embodiment, the guide link 23 is arrange | positioned in the position different from the inner side link 21 and the outer side link 22 in the front-back direction of the sheet | seat S. FIG. More specifically, the inner link 21 and the outer link 22 are arranged at substantially the same position in the front-rear direction. On the other hand, as shown in FIGS. 10 and 18, the guide link 23 is disposed slightly behind the two rotation links 20. With the arrangement of the guide links 23 as described above, in the present embodiment, the sheet S can be stored more compactly. That is, in the present embodiment, by shifting the arrangement position of the guide link 23 from the arrangement position of the inner link 21 and the outer link 22, the rotation link 20 can be arranged by effectively utilizing the space in the vehicle. The sheet S can be made more compact.

Further, the arrangement position of the guide link 23 is outside in the width direction than the arrangement positions of the inner link 21 and the outer link 22, that is, a position closer to the side wall of the vehicle on which the seat S is mounted. With such a positional relationship, the arrangement position of the guide link 23 can be freely determined without being restricted by the inner link 21 or the outer link 22. Further, in a configuration in which a connecting portion (specifically, a short portion 22 h of the outer link 22) is provided between the inner link 21 and the outer link 22, the guide link 23 comes off between the

links

21 and 22. Therefore, the interference between the guide link 23 and the connecting portion can be suppressed.

Furthermore, in the present embodiment, the above-described piston damper 24 is provided near the guide link 23. More specifically, as shown in FIGS. 18 and 19, the piston damper 24 is located in front of the guide link 23 in the front-rear direction and is disposed at substantially the same position as the guide link 23 in the width direction. ing. In other words, the piston damper 24 is provided at a position aligned with the guide link 23 in the front-rear direction.

Due to the positional relationship as described above, when the seat S is stored, the piston damper 24 rotates with respect to the vehicle body floor T together with the guide link 23 while urging the seat cushion 1 outward in the extending direction. . As a result, the guide link 23 can smoothly move the seat portion S1 including the seat cushion 1 to the storage position while being assisted by the biasing force of the piston damper 24.

<< Configuration of the first lock mechanism of the foot link >>
Next, the configuration of the first lock mechanism 11 provided at the lower end of the foot link 10 will be described with reference to FIGS.
As shown in FIGS. 24 to 28, the first lock mechanism 11 is a device that moves the engagement hook 12 in the left-right direction to engage with the striker T2.
The first lock mechanism 11 is connected to a switching mechanism (not shown) via a cable member 17, and can be locked in a lockable state in which the engagement hook 12 can be locked to the striker T 2 by the switching mechanism. It can be switched to a state.

As shown in FIG. 24, the first lock mechanism 11 includes an engagement hook 12, a first rotating plate 13, a second rotating plate 14, an operating plate 15, and a second rotating plate 14 as shown in FIG. And an urging spring 16 for urging the position shown in FIG.
The engagement hook 12 is provided at a substantially central portion in the vertical direction, and is a hook rotation shaft 12a that is pivotally supported by the foot link 10 in the front-rear direction, and a protrusion 12b that is provided at the lower end and is latched by the striker T2. And. When the engagement hook 12 rotates about the hook rotation shaft 12a, the projecting portion 12b moves in the left-right direction, and is engaged with or disengaged from the striker T2.

The first rotation plate 13 includes a first rotation shaft 13 a that is pivotally supported by the foot link 10 in the front-rear direction, and is connected to a cable member 17 described later.
The second rotation plate 14 includes a second rotation shaft 14a that is pivotally supported by the foot link 10 in the front-rear direction, a latch pin 14b that extends in the front-rear direction and is latched on one end of the biasing spring 16, and a foot. And a connecting pin 14c connected to the link 10. The connecting pin 14c passes through a through hole (not shown) formed in the operation plate 15.
The operation plate 15 includes an operation rotation shaft 15a that is pivotally supported by the engagement hook 12 in the front-rear direction, and a latch pin 15b that extends in the front-rear direction and is engaged with the other end of the biasing spring 16. Yes.

As shown in FIG. 18 or FIG. 28, the striker T2 is composed of a substantially U-shaped pipe member extending in the front-rear direction, fixed on the vehicle body floor via a fixing member T2d, and engaged with the foot link 10. It is a member.
The striker T2 is erected from the upper surface of the fixing member T2d, and connects the upper ends of the front leg part T2a and the rear leg part T2b and the front leg part T2a and the rear leg part T2b, which are arranged at different positions in the front-rear direction. 12, and a leg connecting portion T 2 c that is engageable with 12.
The leg connecting portion T2c is a portion engaged with the engagement hook 12, and extends substantially horizontally in the front-rear direction.

The fixing member T2d is made of a substantially rhombus-shaped sheet metal member extending in the front-rear direction, and includes a first fixing portion T2e, a second fixing portion T2f, And a third fixing portion T2g.
The first fixing portion T2e and the second fixing portion T2f are disposed opposite each other in the front-rear direction and spaced apart in the left-right direction, and the first fixing portion T2e and the second fixing portion T2f are arranged between the first fixing portion T2e and the second fixing portion T2f in the left-right direction. 3 fixing | fixed part T2g is provided.
The third fixing portion T2g is disposed behind the first fixing portion T2e and the second fixing portion T2f.

The striker T2 is provided between the first fixing portion T2e and the second fixing portion T2f in the left-right direction, and is disposed in front of the third fixing portion T2g.
Further, in the striker T2, the rear leg portion T2b is arranged in a region surrounded by the first fixing portion T2e, the second fixing portion T2f, and the third fixing portion T2g.
Of the fixing member T2d, the portion to which the striker T2 is connected is an overhanging portion that protrudes upward from the first fixing portion T2e, the second fixing portion T2f, and the third fixing portion T2g. Support rigidity is increased.

The cable member 17 is made of a known cable member, and as shown in FIG. 24, the first lock mechanism 11 and a switching mechanism (not shown) are connected, and the first locking mechanism 11 can be locked by being pulled by the switching mechanism. It switches from the state to the non-lockable state.

With the above configuration, when the first lock mechanism 11 is in the position shown in FIG. 24, the engagement hook 12 is in a locked state engaged with the striker T2.
When the cable member 17 is pulled in the direction of the arrow shown in FIG. 25 from the position shown in FIG. 24, the engagement hook 12 is unlocked from the striker T2. Further, the cable member 17 is always pulled in the direction of the arrow shown in FIG. 25, so that the first lock mechanism 11 is maintained in an unlockable state.
When the cable member 17 is released from the pulled state as shown in FIG. 26 from the position shown in FIG. 25, the first lock mechanism 11 is switched to the lockable state.
When the engagement hook 12 of the foot link 10 is pressed toward the striker T2 from the position shown in FIG. 26, the engagement hook 12 returns to the locked state in which it is engaged with the striker T2, as shown in FIG.

<< Configuration of second locking mechanism of seat cushion >>
Next, the configuration of the second lock mechanism 80 provided at the rear end portion of the seat cushion 1 will be described with reference to FIGS.
As shown in FIGS. 18 to 19 and 29, the second lock mechanism 80 is a device that moves the engagement hook 81 in the left-right direction to engage with the striker T4.
The second lock mechanism 80 is connected to an operation lever (not shown) via a cable member 85, and the engagement hook 81 can be detached from the striker T4 by pulling the operation lever. More specifically, the engaging hook 81 can be switched from the engageable position where it can engage with the striker T4 to the disengageable position by pulling the operation lever.

As shown in FIG. 29A, the second lock mechanism 80 mainly includes an engagement hook 81, an urging spring 82 that urges the engagement hook 81 to an engageable position, and an operation plate 83. Composed.
The engagement hook 81 is provided in the upper part, and is provided in the lower part and a hook rotation shaft 81a pivotally supported in the front-rear direction on the rear frame 34 of the seat cushion frame 1a via a connection bracket (not shown). A connecting pin 81b extending in the direction and connected to the operation plate 83, and a protrusion 81c hooked to the striker T4 are provided.
When the engagement hook 81 rotates around the hook rotation shaft 81a, the projecting portion 81c moves in the left-right direction, and is engaged with or disengaged from the striker T4. Further, the connecting pin 81b passes through a through hole (not shown) formed in the operation plate 83.

The urging spring 82 is wound around the hook rotation shaft 81a, and is configured as a free end with one end hooked to the engagement hook 81 and the other end fixed to the seat cushion frame 1a side. Has been.
One end of the operating plate 83 is connected to the engaging hook 81 via the connecting pin 81 b, and the other end is connected to the cable member 85.

In the second lock mechanism 80, when in the position shown in FIG. 29A, the engagement hook 81 is disposed in the engageable position.
At this time, when the engagement hook 81 is pressed against the striker T4 on the storage floor from above, the engagement hook 81 rotates clockwise around the hook rotation shaft 81a as viewed from the back side of the seat, and the protrusion 81c The striker T 4 is sandwiched so that the biasing force of the biasing spring 82 returns to the engageable position again.
More specifically, since the connecting pin 81b of the engaging hook 81 can freely move between the through holes of the operation plate 83 in the left-right direction, the protrusion 81c abuts against the striker T4 and pushes against the striker T4. It is configured to be movable in the left-right direction by being moved.
As a result, the engagement hook 81 is engaged and locked with the striker T4.

When the cable member 85 is pulled from the position shown in FIG. 29 (a) in the direction of the arrow shown in FIG. 29 (b), the actuating plate 83 causes the engagement hook 81 to hook the hook rotation shaft 81a via the connecting pin 81b. Push it clockwise around the center. As a result, the engagement hook 81 moves to the position where it cannot be engaged, and the striker T4 is released to release the lock.
As long as the cable member 85 is pulled, the engagement hook 81 is always urged to the disengageable position. When the pull of the cable member 85 is released, the engagement hook 81 returns to the engageable position.

<< Other Embodiments >>
In the above embodiment, the vehicle seat of the present invention has been mainly described. However, the above embodiment is for facilitating the understanding of the present invention, and does not limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes the equivalents thereof.

In the above-described embodiment, the guide link 23 is disposed behind the inner link 21 and the outer link 22 in the front-rear direction of the seat S. However, the arrangement position of the guide link 23 is not limited to the rear position of the inner link 21 and the outer link 22. That is, the arrangement position of the guide link 23 may be a position where the seat S can be stored more compactly while suppressing interference between the rotation links 20, and the inner link 21 and the outer link 22 in the front-rear direction. There is no particular limitation as long as the positions are different.

In the above embodiment, the inner link 21 is larger than the outer link 22 in any of the length in the front-rear direction, the length in the width direction, and the moment of inertia of the cross section. However, the present invention is not limited to this. It is not something. That is, the inner link 21 only needs to be larger than the outer link 22 in at least one of the length in the front-rear direction, the length in the width direction, and the moment of inertia of the cross section.

In the above-described embodiment, the connecting portion that connects the

links

21 and 22 is provided between the inner link 21 and the outer link 22. Further, in the present embodiment, the connecting portion is a part of the outer link 22, more specifically, the short portion 22 h of the outer link 22. Accordingly, it is possible to secure the rigidity of the outer link 22 by connecting the inner link 21 and the outer link 22 without increasing the number of parts.
In order to exhibit such an effect more effectively, as shown in FIG. 16, the outer link 22 may be bent in a lateral U shape, and the short portions 22h formed on the upper side and the lower side may be used as connecting portions. .
That is, the first connecting portion that connects the portions on the one end side in the extending direction of each of the inner link 21 and the outer link 22, and the portions on the other end side in the extending direction of each of the inner link 21 and the outer link 22 It is good also as providing the 2nd connection part to connect. According to such a configuration, the rigidity of the outer link 22 can be further improved.
The first connecting portion and the second connecting portion may be configured by an upper short portion 22h and a lower short portion 22h formed on the outer link 22. Also, in the upper short portion 22h, as in the case of the lower short portion 22h, if the housing portion for housing the inner link 21 is configured and welded to the inner link 21, it can be made compact and the rigidity is improved. Can be made.

In the above embodiment, the number of the rotation links 20 is three, but the number of the rotation links 20 may be at least three or more. The present invention can also be applied to a vehicle seat having the same.

Moreover, in said embodiment, although the vehicle seat S becomes a structure which can be accommodated in the accommodation position which formed the seat cushion 1 in the seat back, it is not limited to this, For example, the seat cushion 1 is used. It is good also as a structure which can be accommodated in the accommodation position formed ahead of the sheet | seat.

Further, in the above-described embodiment, the piston damper 24 is attached at a position that urges the seat cushion 2 downward when in the storage position, but is attached at a position that urges the seat cushion 2 in the horizontal direction. May be.
With this configuration, the piston damper 24 does not urge the seat cushion 1 upward at least when the piston damper 24 is in the storage position. For example, the seat S suddenly jumps up and collides with the operator (occupant). This can be suppressed.

In the above-described embodiment, a stowable vehicle seat used for an automobile has been described as a specific example. However, the seat is not limited to this, and in addition to a vehicle seat for a train, a bus, etc., an airplane, a ship, etc. It can also be used as a vehicle seat.

Cb Cable L Reclining unit S Seat (vehicle seat)
S1 Seating part St Operation strap T Car body floor T1 Storage space T2 Striker T2a Front leg part T2b Rear leg part T2c Leg connecting part T2d Fixing member T2e First fixing part T2f Second fixing part T2g Third fixing part T3 Mounting bracket T4 Strike 1 seat Cushion 1a Seat cushion frame 1c, 1d Fixed bracket 2 Seat back 2a Seat back frame 3 Headrest 3a Headrest pillar 4 Seat storage mechanism 10 Foot link 10a Flange 10c Foot link rotating shaft 11 First lock mechanism 12 Engaging hook 12a Hook Rotating shaft 12b Protruding portion 13 First rotating plate 13a First rotating shaft 14 Second rotating plate 14a Second rotating shaft 14b Latching pin 14c Connection pin 15 Operation play 15a actuation pivot shaft 15b latch pin 16 biasing spring 17 cable member 20 pivot link 21 inner link 21a inner link pivot shaft 21b connecting shaft 21c third lock mechanism 21ca engagement hook 21d seat belt anchor 21e accommodating portion 21ea Tongue projection 21eb Lower end portion 21ec Notch 21f, 21g Welded portion 21x, 21y Steel plate 22 Outer link 22a Outer link rotating shaft 22b Connection shaft 22g Long portion 22h Short portion 22i Extension bracket 23 Guide link 23a Guide link turn Moving shaft 23b Connecting shaft 24 Piston damper 25 Relay member 26a, 26b Shaft fixture 31 Inner side frame 32 Door side side frame 33 Front frame 33a Front portion 33b Inclined portion 33c Side portion 34 Rear frame 35 Fixed bracket 35a Body portion 35b, 35c Horizontal plate 35d Front plate 35e, 35f Flange portion 35g Rotating shaft 36 S spring 37 First wire member 37a Front fixed portion 37b Front portion 37c Inclined portion fixed portion 37d Side portion 37e Frame fixed portion 38 First Two-wire member 39 Auxiliary frame 40 Pan frame 41 Left-right direction extension part 41a, 42a, 42b End part 42 Front-rear direction extension part 43 Locking hole 44, 45, 46 Notch part 47 Oblique side 51 Frame member 51a Upper frame part 51b Lower frame portion 51c Upper outer inclined portion 51d Upper inner inclined portion 51e Lower inner inclined portion 51f Plane portion 51i Inner frame portion 51o Outer frame portion 51s Auxiliary frame member 52 Bracket 53 Elliptical annular body 54, 55 Side frame 54a, 55a Side portion 54b , 55b Front edge 54c, 55c Rear edge 54cu, 54cl, 55cu, 55cl Threaded portion 54d, 55d Shaft hole 56, 65 Rotating shaft 57 Rigidity improving member 57a Protruding portion 57l Lower end 57u Upper end 60 Pan frame 60b Bead 61 Upper linear member 62 Lower linear member 61e, 62e, 70e End portion 63 Movable unit 64 Reinforcement plate 64l Lower side 64u Upper side 66 First arm 67 Second arm 68 Plane portion 69 Bead 70 Guide linear member 70s Linear portion 80 Second lock mechanism 81 Engagement hook 81a Hook rotation shaft 81b Connecting pin 81c Protruding portion 82 Energizing Spring 83 Actuating plate 84 Strike 85 Cable member 100 Rotating link

Claims

A vehicle seat that can be stored in a storage position formed on a vehicle body floor,
A first link, a second link and a third link which are connected to a seat cushion included in the vehicle seat and rotate with respect to the vehicle body floor in order to move the seat cushion to the storage position;
In the width direction of the vehicle seat, the first link, the second link, and the third link are arranged at different positions, and the third link is the first link in the front-rear direction of the vehicle seat. A vehicle seat, wherein the vehicle seat is disposed at a position different from one link and the second link.
The third link is arranged at a position closer to the second link among the first link and the second link in the width direction,
The said 1st link is larger than the said 2nd link in at least 1 or more of the length in the said front-back direction, the length in the said width direction, and a cross-sectional secondary moment. Vehicle seats.
The vehicle seat according to claim 1 or 2, wherein the arrangement position of the first link is closer to the center of the vehicle seat in the width direction than the arrangement position of the second link.
The vehicle seat according to any one of claims 1 to 3, wherein a connecting portion that connects between the first link and the second link is provided.
The vehicle seat according to claim 4, wherein the connecting portion is a part of the second link.
The first link is disposed on one end side of the seat cushion in the width direction,
The second link is disposed on the other end side of the seat cushion in the width direction,
The arrangement position of the third link is closer to the side wall of the vehicle on which the vehicle seat is mounted in the width direction than the arrangement positions of the first link and the second link. The vehicle seat according to any one of claims 1 to 5.
The third link is a guide link that guides the seat cushion so that the seat cushion moves to the storage position along a predetermined path,
An urging member that rotates with respect to the vehicle body floor together with the guide link while urging the seat cushion is provided at a position aligned with the guide link in the front-rear direction. The vehicle seat according to claim 1.
A support member disposed between the vehicle body floor and the seat cushion to support the seat cushion;
When the two vehicular seats are provided along the width direction, the first link, the second link, the third link, and the support member are provided separately for the vehicular seat. And
Of the two vehicle seats, at least one of the vehicle seats includes the support member positioned between the first link and the second link in the width direction, and the vehicle seat-specific first seat. The vehicle seat according to any one of claims 1 to 7, further comprising the support member positioned between one link.
The vehicle seat according to any one of claims 2 to 8, wherein the first link has a closed cross-sectional structure.
The vehicle seat according to any one of claims 2 to 9, wherein a seat belt anchor is fixed to the first link.
A connecting portion that connects portions on one end side in the extending direction of each of the first link and the second link;
The vehicle according to any one of claims 2 to 10, wherein at least a part of the connection portion is fixed in a state of being accommodated in an end portion of the first link on the vehicle body floor side. Sheet.
The seat cushion includes a frame-shaped seat cushion frame and a pan frame provided at a front portion of a region defined by the seat cushion frame,
One end side is fixed to the seat cushion, and the seat cushion is supported in the use position, and the support leg is in a state in which the seat cushion cannot be supported in the storage position.
The vehicle seat according to any one of claims 2 to 11, wherein the pan frame is disposed so as to avoid a support leg mounting portion that connects the support leg to the seat cushion frame.
The one end side is attached to the seat cushion, the other end side is connected to the vehicle body floor, and includes an urging member that urges the seat cushion downward or horizontally when in the storage position. The vehicle seat according to any one of 2 to 12.
A seat back frame comprising a pair of vertical frame portions extending in the vertical direction at the side portion of the vehicle seat, and a pair of horizontal frame portions respectively connecting the upper end side and the lower end side of the pair of vertical frame portions. When,
A pan frame fixed to the seat back frame and extending to an area defined by the seat back frame;
A linear member fixed to one surface of the pan frame and constructed to connect the pair of vertical frame portions;
The movement of the operation by the operator for moving the vehicular seat between the use position of the vehicular seat and the storage position is transmitted to the input unit, and the movement transmitted to the input unit, A transmission device that transmits to a moving device that moves the vehicle seat between the use position and the storage position;
The vehicle seat according to any one of claims 2 to 13, wherein the transmission device is in contact with the linear member.