JP2023155174A - Seat for vehicle - Google Patents

Abstract

To improve the supporting rigidity of an engagement striker.SOLUTION: A seat 1 for a vehicle which can switch a seat body having a seat back serving as a backrest part and a seat cushion serving as a seating part between the use position where a seating person can take a seat and the movement position moved from the use position, comprises: a lower rail 31 which is fixed to a floor of the vehicle; an upper rail 32 which is movably supported by the lower rail; a lock device 56 which is provided in the seat body and switches the position of the seat body between the use position and the movement position; and strikers 51, 52 which are provided on the upper rail side and whose engagement and release are performed by the lock device when switching between the use position and the movement position. The lower rail, the upper rail and the strikers are provided in a pair on both sides in the intersection direction with respect to the movement direction of the upper rail. The seat 1 includes a coupling member 55 which extends in the direction in which the pair of strikers gets close to each other, and couples the pair of strikers.SELECTED DRAWING: Figure 5

Description

Regarding vehicle seats.

Conventionally, in a vehicle seat consisting of a seat cushion and a seat back, the seat back, whose front end is rotatably supported, flips up its rear end, tilting the seat body forward, and tilting the seat body forward. A technology has been applied to create a wide space at the rear of the vehicle.
In the vehicle seat disclosed in Patent Document 1, round bar-shaped engagement strikers are individually fixedly attached to the upper portions of a pair of left and right rails that allow the seat body to slide back and forth. The locking device provided at the rear end of the seat body engages with the engagement striker, so that the seat body is held so as not to be tilted forward unless a release operation is performed.

JP 2021-167162 Publication

For vehicle seats, it is convenient to secure a large space behind the seat body, if necessary. However, at other times, especially when a person is seated on the seat body, the seat body is required to be firmly held so as not to tilt forward.
Therefore, it is desired to improve the support rigidity of the engagement striker that holds the seat body.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vehicle seat that can improve the support rigidity of an engagement striker.

In order to solve the above problems, the invention according to claim 1,
A vehicle seat in which a seat body having a seat back serving as a backrest portion and a seat cushion serving as a seating portion can be switched between a use position where a seated person can sit and a moving position moved from the use position. ,
a lower rail fixed to the floor of the vehicle;
an upper rail movably supported by the lower rail;
a locking device provided on the seat body and switching between the use position and the movement position;
a striker provided on the upper rail side and engaged and released by the locking device when switching between the use position and the movement position;
The lower rail, the upper rail, and the striker are provided as a pair on both sides in a direction intersecting the moving direction of the upper rail,
The striker is characterized by extending in a direction in which the pair of strikers approach each other, and further comprising a connecting member that connects the pair of strikers.

The invention according to claim 2 provides the vehicle seat according to claim 1,
The connecting member is configured separately from the striker.

The invention according to claim 3 is a vehicle seat according to claim 3, which comprises:
The connecting member is characterized in that it has a closed cross-sectional shape.

The invention according to claim 4 provides the vehicle seat according to claim 3,
The connecting member is characterized in that it has a cylindrical shape.

The invention according to claim 5 provides the vehicle seat according to any one of claims 1 to 4,
Each of the pair of strikers is provided on the upper rail via a striker support bracket that supports at least a portion of the striker in an extending direction.

The invention according to claim 6 provides the vehicle seat according to claim 5,
The connecting member is also connected to the pair of striker support brackets.

The invention according to claim 7 provides the vehicle seat according to claim 5,
The striker support bracket has an undulating portion,
The striker may be connected to a lower side of the undulating portion.

In the invention as claimed in claim 1, since the pair of strikers are connected by the connecting member, the load received from the seat body can be distributed to the two strikers, and it is possible to improve the support rigidity of each striker. .
Furthermore, even when each striker is extended in a cantilevered state, by connecting each striker with a connecting member, a pair of strikers can be supported on both sides, improving support rigidity. It becomes possible.

In the invention described in claim 2, since the connecting member is configured separately from the striker, it is possible to attach the connecting member to the existing striker for reinforcement. Further, since the connecting member is a separate member, it is easy to adjust the arrangement during installation, which is advantageous in terms of securing space.

According to the third aspect of the invention, since the connecting member has a closed cross-sectional shape, it is possible to reduce the weight while improving the supporting rigidity of the pair of strikers.

In the invention as claimed in claim 4, since the connecting member has a cylindrical shape, high rigidity can be obtained in any direction around the connecting member, and the supporting rigidity of the pair of strikers can be improved. It becomes possible to achieve this goal.

In a fifth aspect of the invention, both of the pair of strikers are provided on the upper rail via a striker support bracket. Therefore, by providing a shape and structure suitable for attaching the upper rail, it is possible to improve the supporting rigidity of the pair of strikers.
Further, by making the striker support bracket separable from the upper rail, it becomes possible to easily change the mounting position of the striker, replace the striker, etc.

In the sixth aspect of the invention, since the connecting member is also connected to the pair of striker support brackets, it is possible to further improve the support rigidity of the pair of strikers.

In the seventh aspect of the present invention, the striker is joined to the lower side of the undulating portion of the striker support bracket. For this reason, the striker is joined to a position where the rigidity of the striker support bracket is increased by the undulating portion, so that it is possible to further improve the support rigidity of the pair of strikers.
Further, since the striker support bracket covers the striker from above, it is possible to effectively improve the support rigidity against an upward load on the striker.

FIG. 1 is a perspective view of a vehicle seat with a seat body in a use position according to an embodiment. FIG. 2 is a side view of the vehicle seat in the use position. FIG. 2 is a perspective view of the vehicle seat in a moving position. FIG. 2 is a side view of the vehicle seat in a moving position. 2 is a perspective view of the vehicle seat in a moving position, seen from a different direction from FIG. 1. FIG. FIG. 2 is a plan view of the vehicle seat in the use position. 7 is a sectional view taken along line AA in FIG. 6. FIG. FIG. 3 is a perspective view of the periphery of left and right strikers. 9 is a sectional view taken along line BB in FIG. 8. FIG. It is a side view of a locking device. FIG. 3 is an exploded perspective view of the locking device. FIG. 7 is a perspective view showing another example of a striker support structure. FIG. 3 is a perspective view showing a striker and another striker support bracket. FIG. 3 is a bottom view of the striker and other striker support brackets.

[Outline of embodiments of the invention]
Embodiments of the present invention will be described below with reference to the drawings. However, although the embodiments described below have various limitations that are technically preferable for implementing the present invention, the technical scope of the present invention is not limited to the embodiments and illustrated examples below. do not have.

This embodiment is a vehicle seat. Vehicles equipped with the following vehicle seats include all types of vehicles in which humans travel, such as ships, aircraft, and vehicles; however, in this embodiment, vehicle seats, particularly automobile seats, are exemplified. .
This embodiment particularly exemplifies a vehicle seat 1 that can be switched between a use position and a movement position in which a passenger can be seated.

The vehicle seat 1 includes a seat body, a rail device 3, a support mechanism 4, and a holding mechanism 5.
The rail device 3 allows the seat body to move along a predetermined direction.
The support mechanism 4 supports the seat body so as to be movable with respect to the rail device 3 between a use position where a seated person can sit and a movement position moved from the use position.
The holding mechanism 5 holds the seat body in the use position.

The seat body includes a seat cushion that supports the thighs and buttocks of a person, a seat back whose lower end is supported by the seat cushion and serves as a backrest, a headrest provided at the upper end of the seat back, and a seat frame. and a reclining mechanism for tilting the seat back relative to the seat cushion.
Furthermore, the seat frame includes a cushion frame that forms the skeleton of the seat cushion, a seat back frame that forms the skeleton of the seat back whose lower end is supported by the seat cushion and serves as a backrest, and a headrest that forms the skeleton of the headrest. A frame is provided.
A cushion pad is provided on the cushion frame, the seat back frame, and the headrest frame, and the cushion pad is covered with an outer skin to constitute the seat body.

In the following description of the vehicle seat 1, illustrations and detailed descriptions of the well-known configuration of the seat body will be omitted.
Next, the configurations of the rail device 3, the support mechanism 4, the holding mechanism 5, and their surroundings, which are the characteristic configurations of the vehicle seat 1, will be explained in detail with reference to the drawings.

1 is a perspective view of a vehicle seat 1 with a seat body in a use position according to an embodiment, FIG. 2 is a side view thereof, FIG. 3 is a perspective view of a vehicle seat 1 with a seat body in a moving position, and FIG. 4 is a perspective view of a vehicle seat 1 with a seat body in a use position. FIG. Furthermore, FIG. 5 is a perspective view of the vehicle seat 1 in the moving position seen from a direction different from that in FIG. 1, FIG. 6 is a plan view of the vehicle seat 1 in the use position, and FIG. FIG.
In each figure shown in this embodiment, the directions up, down, left, right, front and back indicate the direction when the vehicle is attached to the vehicle, and the forward direction of the vehicle is referred to as "front", the opposite direction is "rear", and forward direction is referred to as "front". The left hand side is called "left" and the right hand side is called "right".
In the following description of the vehicle seat 1, unless otherwise specified, the arrangement, orientation, and direction of each part will be described on the premise that the seat body is in the use position.

[Cushion frame]
As shown in FIGS. 1 to 7, the cushion frame 2 includes left and right cushion side frames 20, 21 arranged at intervals, and left and right cushion side frames 20, 21 connected to the rear ends of each cushion side frame 20, 21. It has pipe frame support brackets 22 and 23, pipe frames 24 and 25 that connect the left and right cushion side frames 20 and 21, and a pipe frame 26 that connects the left and right pipe frame support brackets 22 and 23.

As shown in FIGS. 1 and 2, the left and right cushion side frames 20, 21 are formed with an open cross-sectional structure having a substantially U-shaped cross section that is open toward the inside of each other.
The left cushion side frame 20 has a flat web 200 that forms the left side surface of the cushion frame 2, and flanges 201 and 202 that are integrally formed on the top and bottom of the web 200, respectively.
The right cushion side frame 21 has a flat web 210 that forms the right side surface of the cushion frame 2, and flanges 211 and 212 that are integrally formed on the top and bottom of the web 210, respectively. The left and right cushion side frames 20 and 21 are each formed from a single metal plate by press working.

The left and right webs 200, 210 are flat plate-shaped along the front-rear, up-down direction, and have the same shape when viewed from the side. The left and right webs 200, 210 have an overall shape that is generally elongated in the front-rear direction when viewed from the side. The front end portions of the left and right webs 200, 210 have a vertical width that is somewhat narrower than the other portions, and extend somewhat diagonally upward from the front. Further, the rear end portions of the left and right webs 200, 210 are cut in a diagonally downward rear direction. Further, in the center of the cut portion, a relief portion consisting of an arcuate notch is formed to avoid a pipe frame 26, which will be described later.
The flanges 201, 202, 211, 212 described above are not formed at the front and rear ends of the left and right webs 200, 210.

Furthermore, the front end sides of the left and right webs 200, 210 are bent in the middle, and the angle of inclination diagonally upward is somewhat reduced in front of the bent part.
Circular through holes are formed in the front end portions and bent portions of the left and right webs 200, 210, into which the left end portions and right end portions of the pipe frames 24, 25 are inserted. The pipe frames 24 and 25 connect the front portions of the left and right cushion side frames 20 and 21. Although the pipe frames 24 and 25 and the left and right webs 200 and 210 are joined by, for example, welding, they may be connected by other joining methods. The pipe frames 24 and 25 are oriented in parallel in the left-right direction.
Note that in the following description, when "joining by welding or the like" is used, welding is exemplified as the joining method, but it indicates that a method other than welding may be used.

A pipe frame support bracket 22 is provided on the right side (inner side) of the web 200 at the rear end of the left cushion side frame 20. Further, a seat back support bracket (not shown) is provided on the left side (outer side) of the web 200 at the rear end of the cushion side frame 20.

The pipe frame support bracket 22 extends obliquely rearward and upward from between the flanges 201 and 202 at the rear end portion of the cushion side frame 20 where the flanges 201 and 202 are not formed.
The pipe frame support bracket 22 has a substantially U-shaped cross section with the opening side facing left, and is formed by press working from a single metal plate.

The pipe frame support bracket 22 has a flat web 221 extending in the front-rear, up-down direction, and flanges 222 raised toward the left on the front and rear edges of the web 221. Furthermore, a substantially rectangular convex portion 223 bulging toward the left is formed at the upper end of the pipe frame support bracket 22 . The pipe frame support bracket 22 has increased rigidity due to the front and rear flanges 222 and the convex portion 223, and has a structure that suppresses deflection in the left and right direction.

The pipe frame support bracket 22 is fixed to the rear end of the cushion side frame 20 with fastening members such as a plurality of bolts. Note that the outer surfaces of the front and rear flanges 222 of the pipe frame support bracket 22 may be in contact with the inner surfaces of the respective flanges 201 and 202 of the cushion side frame 20, and may be joined at multiple locations by welding or the like. good.
The cushion side frame 20 and the pipe frame support bracket 22 both have a substantially U-shaped cross section and are integrally joined with their respective open sides facing each other. Therefore, the cushion side frame 20 and the pipe frame support bracket 22 form a rectangular cylindrical structure with a closed cross section, and the rigidity is greatly increased.

Further, the pipe frame support bracket 22 has a circular hole formed so as to pass through the lower end portion of the convex portion 223 in the left-right direction, and the left end portion of the pipe frame 26 is inserted into the circular hole. Although the pipe frame 26 and the pipe frame support bracket 22 are joined by, for example, welding, they may be connected by other joining methods.
The portion undulating from the web 221 by the convex portion 223 has increased rigidity due to the deformation of the plate surface. Therefore, by joining the left end portion of the pipe frame 26 to the circular hole provided at the lower end portion of the convex portion 223, the pipe frame 26 can be supported with high strength.

A pipe frame support bracket 23 is provided on the right side (outside surface) of the web 210 at the rear end of the right cushion side frame 21, and a seat back support bracket 27 is further provided on the right side thereof.

The pipe frame support bracket 23 and the seat back support bracket 27 extend obliquely upward from the rear end of the web 210.

The seat back support bracket 27 has a substantially U-shaped cross section that is open to the right side, and includes a flat web 271 extending in the front-rear, up-down direction, and a front edge and a rear edge of the web 271. It has a flange 272 that is raised toward the flange 272. The seat back support bracket 27 is formed from a single metal plate by press working.

The pipe frame support bracket 23 and the seat back support bracket 27 extend in the same direction from the rear end of the right cushion side frame 21, but the seat back support bracket 27 extends further upward. . The seat back support bracket 27, together with the left seat back support bracket (not shown), has its upper end connected to a lower right end and a lower left end of a seat back frame (not shown). The left seat back support bracket and the right seat back support bracket 27 rotatably support the lower end of the seat back frame about an axis along the left-right direction.

A known reclining mechanism (not shown) is provided between the left and right seat back support brackets and the seat back frame.
The left and right reclining mechanisms each have a rotation axis extending in the left-right direction and a spiral spring that urges the seat back frame forward. The spiral spring has one end held by the seat back support bracket and the other end held by the seat back frame.
The reclining mechanism has a fixing mechanism that fixes the seat back in an upright position at a predetermined angle. In addition, the reclining mechanism is released from the fixed state by operating an operation lever (not shown), and the spiral spring rotates the seat back frame forward with respect to the left and right seat back support brackets and folds it toward the cushion frame 2 side. be able to.

The seat back support bracket 27 has a step 273 extending generally in the front-rear direction, and is formed in such a shape that the upper half of the web 271 dips to the right. The seat back support bracket 27 has increased rigidity due to the deformation of the web 271 due to the step 273 and the flanges 272.

The pipe frame support bracket 23 has a flat web 231 extending in the front-rear, up-down direction, and a flange 232 raised toward the right at the rear edge of the web 231. The pipe frame support bracket 23 is formed from a single metal plate by press working.
The left side of the lower part of the web 231 is in contact with the right side of the web 210 of the cushion side frame 21 . Further, the right side of the web 231 is in contact with the lower left side of the web 271 of the seat back support bracket 27 .

The pipe frame support bracket 23 is fixed to the rear end of the cushion side frame 21 together with the seat back support bracket 27 by fastening members such as a plurality of bolts passing through each web 210, 231, 271. Note that the contact portions of each web 210, 231, 271 may be joined by welding or the like.
Alternatively, the front surface of the flange 232 of the pipe frame support bracket 23 may be brought into contact with the rear surface of the flange 272 on the rear side of the seat back support bracket 27, and these may be joined by welding or the like at a plurality of locations.

The web 231 of the pipe frame support bracket 23 has a step 233 where the upper end of the web 231 drops to the right. The upper end of the web 231 is separated into two parts, and the tip end of each is joined to the left side of the upper half of the seat back support bracket 27 that is depressed to the right by a step 273 of the web 271.
The step 233 of the pipe frame support bracket 23 is located higher than the step 273 of the seat back support bracket 27. Therefore, the web 231 of the pipe frame support bracket 23 and the web 271 of the seat back support bracket 27 form a structure with a square prism-like closed cross-section along the front-rear direction. Thereby, the connected body of the pipe frame support bracket 23 and the seat back support bracket 27 has high rigidity and can firmly support the seat back and the pipe frame 26.

In addition, circular holes are formed through the center portion of the web 231 of the pipe frame support bracket 23 and the position where the step 273 is formed in the web 271 of the seat back support bracket 27, so that they overlap when viewed from the left and right direction. The right end portion of the frame 26 is inserted. The pipe frame 26 is joined to the pipe frame support bracket 23 and the seat back support bracket 27 by, for example, welding, but may be connected by other joining methods.
The right end of the pipe frame 26 is inserted into a circular hole provided at a position where the rigidity is increased due to the deformation of the step 273 in the web 271, and where the rigidity is increased due to the quadrangular prism-like structure of each web 231, 271. By joining these, the pipe frame 26 can be supported with high strength.

The cushion frame 2 includes the left and right cushion side frames 20, 21 and the three pipe frames 24 to 26 to form a substantially rectangular frame in plan view.
The cushion frame 2 is provided with a pressure receiving member 28 suspended between the left and right cushion side frames 20 and 21 between the second pipe frame 25 from the front and the rear pipe frame 26.
The pressure receiving member 28 is a member that receives the load of a person sitting on the vehicle seat 1.

The pressure receiving member 28 is a rectangular resin sheet material that is elongated in the left-right direction. On the upper flanges 201 and 211 of the left and right cushion side frames 20 and 21, mounting pieces (not shown) for pressure receiving members 28 extending inward in the left and right direction are attached to the flanges at two locations arranged in front and back. It is formed integrally with 201 or 211.
The pressure receiving member 28 is fixed to each mounting piece at two locations on the front and rear of the left end and at two locations on the front and back of the right end with fastening members such as bolts.
The center portion of the pressure receiving member 28 is bent downward compared to the left and right end portions connected to the left and right cushion side frames 20 and 21. A cushion pad of the seat cushion is arranged on this pressure receiving member 28.

Note that attachment of the pressure receiving member 28 to the cushion frame 2 is not limited to using a fastening member, and methods such as adhesion or providing a locking member for locking may be used.
Further, the pressure receiving member 28 may be elongated in the front and back and may be attached to each of the pipe frames 24 to 26.
Further, the pressure receiving member 28 is not limited to a sheet material made of resin, and may be made of any material that can take the form of a sheet or a sheet. For example, a net, a wire curved into a planar shape, a spring material developed into a planar shape, etc. may be used.

[Rail device]
The rail device 3 is arranged vertically between the cushion frame 2 and the floor material F of the vehicle body on which the vehicle seat 1 is installed.
As shown in FIGS. 1 and 2, the rail device 3 includes a pair of left and right lower rails 31 fixed to the floor material F of the vehicle body, and a pair of left and right upper rails 32 supported so as to be movable relative to each lower rail 31. , mainly includes a stopping member 33 that stops the pair of upper rails 32 from moving, and an operating lever 34 that releases the blocking state of the stopping member 33.

The front end and the rear end of each lower rail 31 are fixed via mounting brackets 35, 36 to block-shaped bases F1, F2 provided front and back on the upper surface of the floor material F of the vehicle body. Each lower rail 31 is fixed along the front-rear direction.

The front mounting bracket 35 is made of a long metal plate whose rear half is substantially horizontal and whose front half is inclined diagonally downward. The left and right sides of the mounting bracket 35 have flanges raised upward. The lower surface of the front half of the mounting bracket 35 serves as a mounting surface in contact with the front inclined surface of the base F1, and the upper surface of the rear half of the mounting bracket 35 serves as a mounting surface on which the lower rail 31 is placed.
The mounting bracket 35 is fixed to the base F1 by a fastening member such as a bolt passing through the front half.
Further, the inner width of the left and right flanges of the mounting bracket 35 substantially matches the outer width of the lower rail 31. Therefore, the lower rail 31 can be fitted between the flanges. The front end of the lower rail 31 is fixed to the floor material F by a fastening member such as a bolt passing through the mounting bracket 35 and the lower rail 31.
By making the through hole on either the mounting bracket 35 side or the lower rail 31 side, through which the fastening member connecting the mounting bracket 35 and the lower rail 31 passes, a long hole along the front-rear direction, the mounting position of the lower rail 31 can be adjusted. It may be adjustable in the front-back direction.
The installation height of the lower rail 31 may be adjustable by forming a through hole through which a fastening member for fixing the mounting bracket 35 to the base F1 is formed as a long hole along an inclined surface.

The rear mounting bracket 36 has upwardly raised flanges on both left and right sides, and is made of a long metal plate extending in the front-rear direction. The lower surface of the rear half of the mounting bracket 36 serves as a substantially horizontal mounting surface on which the upper surface of the base F2 is placed, and the upper surface of the front half serves as a substantially horizontal mounting surface on which the lower rail 31 is mounted.
The mounting bracket 36 is fixed to the base F2 by a fastening member such as a bolt passing through the rear half.
Further, the inner width of the left and right flanges of the mounting bracket 36 substantially matches the outer width of the lower rail 31. Therefore, the lower rail 31 can be fitted between the flanges. The rear end portion of the lower rail 31 is fixed to the floor material F by a fastening member such as a bolt passing through the mounting bracket 36 and the lower rail 31.
The mounting position of the lower rail 31 can be adjusted by making the through hole on either the mounting bracket 36 side or the lower rail 31 side, through which the fastening member connecting the mounting bracket 36 and the lower rail 31 passes, a long hole along the front-rear direction. It may be adjustable in the front-back direction. Alternatively, the mounting position of the lower rail 31 may be adjustable in the front-rear direction by making the through hole through which the fastening member fixing the mounting bracket 36 to the base F2 passes a long hole extending in the front-rear direction.

The lower rail 31 is a long member with an open cross section that is open upward over its entire length. The lower rail 31 is formed from a single metal plate by press working. The lower rail 31 has a substantially U-shaped cross section over its entire length. That is, the lower rail 31 includes a long strip-shaped bottom plate portion 311 and left and right side wall portions rising upward from both left and right sides of the bottom plate portion 311. At the upper ends of the left and right side wall parts, a turned part is formed over the entire length, going inward from the upper end and being further folded back downward.

The upper rail 32 is a long member with an open cross section that is open downward over its entire length. The upper rail 32 is formed from a single metal plate by press working. The upper rail 32 has a generally upside-down U-shaped cross section over its entire length. That is, the upper rail 32 includes an elongated belt-shaped top plate portion 321 and left and right side wall portions that hang downward from both left and right sides of the top plate portion 321. At the lower ends of the left and right side wall parts, a turned part is formed over the entire length, going outward from the lower end and further being folded back upward.

When the upper rail 32 is inserted inward from one end of the lower rail 31, the top plate portion 321 protrudes upward from between the left and right side walls of the lower rail 31 over its entire length. Further, inside the lower rail 31, the left and right bent portions of the upper rail 32 are restrained from above by the left and right bent portions of the lower rail 31, preventing the upper rail 32 from falling upward relative to the lower rail 31, while allowing the upper rail 32 to slide back and forth. is possible.

The restraining member 33 and the operating lever 34 constitute a slide restraining mechanism that restricts the sliding of the seat body in the longitudinal direction. The restraining member 33 and the operating lever 34 are individually mounted at intermediate positions in the longitudinal direction of the top plate portion 321 of the left and right upper rails 32, respectively.
The operating lever 34 is an elongated body with a rotating end portion at which an operating input is performed extending toward the front, and the restraining member 33 is provided at a longitudinally intermediate portion of the operating lever 34 and extends downward. It has been extended. The restraining member 33 and the operating lever 34 are made of one integrated member.
The rear end portions of the left and right operating levers 34 are respectively fixed to the left end portion and the right end portion of an interlocking shaft 341 along the left-right direction. The interlocking shaft 341 has its left and right ends rotatably supported by left and right shaft brackets 342 fixedly installed at intermediate positions in the longitudinal direction of the top plate portion 321 of the left and right upper rails 32, respectively.
Therefore, when the left and right operation levers 34 are rotated in either direction, they are both rotated in conjunction with each other by the interlocking shaft 341.

The restraining member 33 is loosely inserted into a rectangular long hole formed in the top plate portion 321 of the upper rail 32, and its lower end portion can be brought into contact with the bottom plate portion 311 of the lower rail 31.
Fitting holes are formed in the bottom plate portion 311 at regular intervals along the front-rear direction, and the lower end portion of the restraining member 33 is inserted into each fitting hole. Thereby, when the restraining member 33 comes into contact with the bottom plate portion 311 from above, sliding of the upper rail 32 in the front-rear direction with respect to the lower rail 31 is restricted. Note that the configuration for the restraining member 33 to restrict sliding of the upper rail 32 in the front-rear direction is not limited to the above-mentioned example, and any configuration capable of restricting the sliding of the upper rail 32 can be adopted.

An input arm 343 extending upward from the interlocking shaft 341 is fixedly attached to the center portion of the interlocking shaft 341 in the left-right direction, for example, by hugging. A tension wire 344 that applies forward tension to the input arm 343 is connected to an upwardly extending rotating end of the input arm 343 . As a result, a downward pressing force is applied from the interlocking shaft 341 to the stop member 33, and the stop member 33 can restrict sliding of the upper rail 32 in the front-rear direction.
Further, by rotating either the left or right operating lever 34 in the direction of pulling up against the tension applied by the tension wire 344, the restraining state by the restraining members 33 on both the left and right sides can be released.

[Support mechanism]
The support mechanism 4 includes a left support mechanism 40A that supports the left side of the cushion frame 2 on the left upper rail 32, and a right support mechanism 40B that supports the right side of the cushion frame 2 on the right upper rail 32. .

The left support mechanism 40A is installed on the upper surface of the front end side of the top plate portion 321 of the left upper rail 32.
The left support mechanism 40A includes a support arm 41A, a support shaft 42A, a first support bracket 43A, and a second support bracket 44A.

The first support bracket 43A includes a board part 431A that is placed and fixed on the upper surface of the front end side of the top plate part 321 of the left upper rail 32, and a side wall part 432A that stands up vertically from the right end part of the board part 431A. and has.
The second support bracket 44A has a base plate part 441A fixed to the upper surface of the front end side of the top plate part 321 of the left upper rail 32 via the base plate part 431A of the first support bracket 43A, and a base plate part 441A that is perpendicular to the right end part of the base plate part 441A. It has a side wall portion 442A that stands up.
Both the first support bracket 43A and the second support bracket 44A are formed from a single metal plate by press working.

The base plate portion 431A of the first support bracket 43A has a rectangular shape that is elongated in the front-rear direction, and its right end portion extends further to the right than the right end portion of the top plate portion 321. Therefore, the side wall portion 432A is erected to the right of the right end portion of the top plate portion 321.
The side wall portion 432A has an upper end protruding in an arc shape such that the center portion in the left-right direction is the highest when viewed from the side. A circular hole that supports the right end of the support shaft 42A is formed in the center of this arc-shaped protruding portion, passing through it in the left-right direction. The side wall portion 432A has a flange raised toward the right from the arcuate upper end portion to the rear end portion. This flange increases the rigidity around the circular hole, suppresses deflection of the side wall portion 432A, and increases the support strength of the support shaft 42A.

The base plate portion 441A of the second support bracket 44A has a rectangular shape that is elongated in the front-rear direction, and has a narrower horizontal width than the base plate portion 431A described above. The board part 441A is placed on top of the board part 431A, and the first support bracket 43A and a second support bracket 44A are fixed onto the top plate portion 321 of the upper rail 32.

The side wall portion 442A has approximately the same shape as the aforementioned side wall portion 432A when viewed from the side. The side wall portion 442A faces the side wall portion 432A in parallel on the left side with a constant interval therebetween.
In the side wall portion 442A, a circular hole for supporting the left end portion of the support shaft 42A is formed in the center of the arc-shaped protruding portion to penetrate in the left-right direction. Around the circular hole, a protrusion is formed that protrudes to the right on the right surface of the side wall portion 442A and is recessed to the right on the left surface. This protrusion increases the rigidity around the circular hole, suppresses deflection of the side wall 442A, and increases the support strength of the support shaft 42A.

Furthermore, connecting pins 46A are provided at three locations around the lower side of the support shaft 42A, which are suspended between the opposing side wall portions 432A and 442A. The left and right ends of each connecting pin 46A are fixed to each side wall 432A, 442A by caulking, welding, etc., and the distance between the side walls 432A, 442A in the left and right direction is maintained constant. do. Moreover, the rigidity of each side wall part 432A, 442A is increased by the connection of each connection pin 46A, the bending of each side wall part 432A, 442A is suppressed, and the support strength of support shaft 42A is increased.

Further, among the three connecting pins 46A, the connecting pin 46A located in front of the support shaft 42A is used when the rear end portion of the cushion frame 2, which is rotatably supported by a support arm 41A to be described later, is rotated up and down. The front end of the support arm 41A comes into contact with the support arm 41A, and also functions as a stopper that prevents the support arm from rotating beyond the angle shown in FIGS. 3 and 4.

The support arm 41A is formed from a thick metal plate that has an elbow shape when viewed from the side. The support arm 41A extends rearward and upward diagonally from the base end supported by the support shaft 42A, and is bent at a bend in the middle so that the rotating end opposite to the base end is approximately horizontal. It has been extended to
The rotating end portion of the support arm 41A is connected to the right side of the web 200 via a spacer block (not shown) at a front-rear intermediate portion of the cushion side frame 20 by a plurality of fastening members such as bolts.
Further, a circular hole through which the support shaft 42A is inserted is formed in the base end of the support arm 41A in the left-right direction. The base end portion of the support arm 41A is rotatably supported by the support shaft 42A between the respective side wall portions 432A and 442A of the first and second support brackets 43A and 44A.
Note that the support arm 41A may be rotatably supported by making the support shaft 42A rotatable relative to the first and second support brackets 43A and 44A, or the support arm 41A may be rotatably supported relative to the support shaft 42A. may be rotatably supported.

In the left support mechanism 40A, both the first support bracket 43A and the second support bracket 44A have side wall portions 432A and 442A located on the right side of the upper rail 32, so that each structure of the support mechanism 40A can be adjusted to the left cushion side. This allows for offset so as not to interfere with the frame 20.
Furthermore, the first support bracket 43A and the second support bracket 44A are arranged so that their respective base plate parts 431A and 441A are overlapped, and their respective side wall parts 432A and 442A are maintained at a constant distance from each other by a connecting pin 46A. connected. These structures allow the left support mechanism 40A to support the left side of the seat body with high support rigidity and strength from a position offset to the right of the upper rail 32.

The right support mechanism 40B is installed on the upper surface of the front end side of the top plate portion 321 of the right upper rail 32.
The right support mechanism 40B includes a support arm 41B, a support shaft 42B, a support bracket 43B, and an undulation spring 45B.

The support bracket 43B includes a board part 431B that is placed and fixed on the upper surface of the front end side of the top plate part 321 of the right upper rail 32, and a pair of side wall parts that stand up vertically from both left and right ends of the board part 431B. 432B. The support bracket 43B has an open cross-sectional shape that is open upward. The support bracket 43B is formed from a single metal plate by press working.

The base plate portion 431B of the support bracket 43B has a rectangular shape elongated in the front-rear direction, and has a width wider than the top plate portion 321 of the upper rail 32 in the left and right directions. The support bracket 43B is placed on the top plate part 321 so that the top plate part 321 is located at the center of the base plate part 431B in the left-right direction. The support bracket 43B is fixed to the upper rail 32 by fastening members such as a plurality of bolts passing through the base plate portion 431B and the top plate portion 321.

The pair of side wall portions 432B each have an upper end protruding in an arc shape such that the center portion in the left-right direction is the highest when viewed from the side. A circular hole that individually supports the left and right ends of the support shaft 42B is formed through the center of the arc-shaped protruding portion of each side wall portion 432B in the left-right direction.

The support arm 41B includes a substrate portion 411B and a pair of side wall portions 412B vertically raised from both left and right ends of the substrate portion 411B, and has an open cross-sectional shape that is open upward. The support arm 41B is formed from a single metal plate by press working.

When the seat body is in the use position, the front end of the base plate 411B is inclined downward, and the portion other than the front end is a substantially horizontal flat plate.
A mounting piece (not shown) extending inward in the left-right direction is formed integrally with the flange 212 on the lower side of the cushion side frame 21 . The flat plate-shaped portion of the base plate portion 411B is connected to the mounting piece extending from the flange 212 at two locations, front and rear, by fastening members such as bolts.

The pair of side wall portions 412B have an elongated rectangular shape in side view except for the front end portion, and the front end portion has a substantially arc shape. A circular hole through which the support shaft 42B is inserted is formed in the center of the arc-shaped portion of each side wall portion 412B in the left-right direction.

The width of the support arm 41B in the left-right direction substantially matches the interval between the opposing surfaces of the pair of side walls 432B of the support bracket 43B. The front end of the support arm 41B is stored between the pair of side walls 432B of the support bracket 43B, and the support bracket 43B and the support arm 41B are connected by a support shaft 42B.
The support shaft 42B is oriented parallel to the left-right direction. The support arm 41B rotates about the support shaft 42B together with the right side cushion side frame 21.
Note that the support arm 41B may be rotatably supported by making the support shaft 42B rotatable with respect to the support bracket 43B, or the support arm 41B may be rotatably supported with respect to the support shaft 42B. It's okay.

The undulation spring 45B is a so-called torsion coil spring, and a coil portion thereof is inserted and supported by the support shaft 42B. Further, one end of a wire that is a spring material of the undulating spring 45B is connected to the support bracket 43B, and the other end is connected to the support arm 41B. The undulating spring 45B applies an elastic force in a direction in which the rotating end of the support arm 41B, that is, the rear end side of the cushion frame 2, is lifted upward.

A block member 46B that holds one end of the undulation spring 45B is provided on the front side of the undulation spring 45B inside the support bracket 43B. This block material 46B is designed to prevent the front end of the support arm 41B from coming into contact with the front end of the cushion frame 2 when the rear end of the cushion frame 2 is erected and rotated by the undulating spring 45B, and to prevent the block member 46B from erecting and rotating beyond the angle shown in FIGS. 3 and 4. It also functions as a stopper to regulate the

Further, a connection frame 47 is suspended between the side wall portion 432A of the first support bracket 43A of the left support mechanism 40A and the left side wall portion 432B of the support bracket 43B of the right support mechanism 40B. The connection frame 47 is a frame member with an open cross-section and open downward, and has a top plate portion parallel to the left-right direction and the front-rear direction, and a pair of front and rear side plate portions parallel to the left-right direction and the up-down direction. The connection frame 47 extends in the left-right direction. The connecting frame 47 has plate-shaped protrusions at both left and right ends, each of which extends a top plate portion and a pair of side plate portions in the left-right direction. A slit-shaped opening into which each plate-shaped projection is inserted is formed in each of the side wall portion 432A and the side wall portion 432B.
The connecting frame 47 is assembled with each of the plate-like protrusions at both ends inserted into the openings of the side wall 442A and the side wall 432B. Each plate-shaped projection of the connection frame 47 may be joined to the side wall portion 442A and the side wall portion 432B by welding or the like.
By connecting the first support bracket 43A of the left support mechanism 40A and the support bracket 43B of the right support mechanism 40B by the connection frame 47, the support mechanisms 40A and 40B receive the load from the seat body in a distributed manner. , it becomes possible to support the seat body with high support strength.

In the support mechanism 4, the support shaft 42A of the left support mechanism 40A and the support shaft 42B of the right support mechanism 40B are concentric, and thereby the seat main body can be supported rotatably.
Further, the support mechanism 4 allows the seat body to rotate in a range from a use position where a seated person can sit to a movement position where the rear end of the seat body is flipped upward.
The movement position of the seat body is a position where rotation is restrained by the aforementioned connecting pin 46A and block material 46B. The use position of the seat body is a position where it is held by a holding mechanism 5, which will be described later.
The support mechanism 4 is always urged to rotate the seat body toward the moving position by the undulation spring 45B, but the seat body is held at the use position by the holding mechanism 5, and when the holding mechanism 5 releases the seat body, Can be switched to a moving position.

[Retention mechanism]
The holding mechanism 5 includes left and right strikers 51 and 52, left and right striker support brackets 53 and 54, a connecting member 55, and left and right locking devices 56 and 56.
8 is a perspective view of the vicinity of the left and right strikers 51, 52, and FIG. 9 is a sectional view taken along line BB in FIG. 10 is a side view of the lock device 56, and FIG. 11 is an exploded perspective view. In FIGS. 8 and 9, the symbol W indicates a joint location by welding or the like.

As shown in FIGS. 8 and 9, the left and right strikers 51 and 52 are individually attached to the upper surface of the left and right upper rails 32 near the rear ends of the top plate portions 321 via striker support brackets 53 and 54. .
The left and right strikers 51, 52 are both made of highly rigid wires formed in a substantially U-shape.

The left striker 51 has the opening side of the U-shape facing left, and one end 511 and the other end 512 of a wire extending toward the opening are joined to the upper surface of the left striker support bracket 53 by welding or the like. Further, the striker 51 is supported with a connecting portion 513 corresponding to the bottom of the U-shape extending to the right (inward in the left-right direction) from the right end of the striker support bracket 53.
Similarly, the right striker 52 has a U-shaped opening facing left, and one end 521 and the other end 522 of a wire extending toward the opening are joined to the upper surface of the right striker support bracket 54 by welding or the like. ing. Further, the striker 52 is supported with a connecting portion 523 corresponding to the bottom of the U-shape extending to the left (inward in the left-right direction) from the left end of the striker support bracket 54 .
Therefore, the left and right strikers 51 and 52 have their connecting portions 513 and 523 extending in a direction toward each other.

In each striker 51, 52, one end portion 511, 521 of the wire and the other end portion 512, 522 of the wire are parallel to each other in the left-right direction on the left and right upper rails 32, respectively. One end portion 511, 521 and the other end portion 512, 522 of the wire of each striker 51, 52 are arranged in front and back.
Each of the strikers 51 and 52 locks an end portion 512 and 522 of the wire located on the rear side and extends inward in the left and right direction from the striker support brackets 53 and 54 by locking devices 56 and 56, respectively. Retention and release occur.

The left and right striker support brackets 53 and 54 are both made of a single metal flat plate. The left and right striker support brackets 53, 54 have mounting parts 531, 541 placed on the top plate part 321 of the upper rail 32, an extension part 532 extending inward in the left-right direction from the mounting parts 531, 541, 542. The mounting parts 531, 541 of the left and right striker support brackets 53, 54 are somewhat longer in the front-rear direction than the extension parts 532, 542. For example, the rear ends of the mounting parts 531, 541 are connected to the extension parts 532, 542. It extends to the rear.

The left and right strikers 51, 52 are arranged so that one end 511, 521 and the other end 512, 522 of the wire cross the mounting parts 531, 541 and the extension parts 532, 542 of the striker support brackets 53, 54. It is placed on the top. One end 511, 521 and the other end 512, 522 of the wires of the left and right strikers 51, 52 are joined by welding or the like over almost the entire area overlapping the striker support brackets 53, 54 in plan view. There is. Each striker 51, 52 is joined to the striker support bracket 53, 54 with high strength by joining the overlapping area to the striker support bracket 53, 54, and has high support strength against the load received from the seat body. have

The left and right striker support brackets 53, 54 are arranged to sandwich the rear ends 512, 522 of the strikers 51, 52 in the front and back on the mounting parts 531, 541, and are attached to each upper rail 32 by fastening members such as two bolts. It is fixed to the top plate part 321 of.
The ends 512, 522 of the left and right striker support brackets 53, 54 that engage with the locking devices 56, 56 are particularly susceptible to loads from the seat body, and two fastening members are arranged to sandwich the ends 512, 522. The striker support brackets 53 and 54 are fixed to the upper rail 32. As a result, the left and right striker support brackets 53 and 54 have high support strength against the load received from the seat body.

The connecting member 55 connects the left and right strikers 51 and 52 along the left-right direction.
Specifically, the upper outer periphery of the left end of the connecting member 55 is attached to the lower outer periphery of the portion of the front end 511 of the left striker 51 that extends to the right from the right end of the striker support bracket 53 by welding or the like. It is joined.
Further, the upper outer periphery of the left end and the right end of the connecting member 55 is welded or the like to the lower outer periphery of the portion of the front end 521 of the right striker 52 that extends leftward from the left end of the striker support bracket 54. It is joined.

The connecting member 55 is made of a pipe material with a closed circular cross section. The left and right strikers 51 and 52 are supported in a cantilevered manner by striker support brackets 53 and 54. By connecting these with the connecting member 55, the left and right strikers 51, 52 are integrally supported on both sides, and the load can be distributed between the left and right sides, so that it can withstand the load from the seat body side. This makes it possible to support it with high strength.
Moreover, since the connecting member 55 has a closed cross-sectional shape, it has high bending rigidity and deformation is suppressed, so that the supporting strength of the left and right strikers 51 and 52 can also be maintained high.
Note that the cross-sectional shape of the connecting member 55 is not limited to a circular shape, and may be other closed cross-sectional shapes such as a polygonal shape. However, a circular closed cross-sectional shape is more preferable because deformation due to bending can be effectively suppressed against loads from any direction.

The connecting member 55 is joined to the lower part of the outer periphery of the ends 511, 521 of the left and right strikers 51, 52, but if it does not interfere with the surrounding structure, it may be joined to the front part of the outer periphery or the upper part of the outer periphery of the end parts 511, 521. May be joined. When joining to the front outer periphery of the end portions 511, 521, the striker support brackets 53, 54 are extended further to the front side, the connecting member 55 is extended longer from side to side, and the upper surfaces of the striker support brackets 53, 54 are also joined. May be joined. Thereby, the support strength of the left and right strikers 51, 52 can be further increased.

The left and right locking devices 56, 56 are supported in a hanging state by the pipe frame 26 on the rear side of the cushion frame 2 via mounting brackets 57, 58, respectively.
The left and right mounting brackets 57 and 58 are respectively arranged at positions where they can hold the rear ends 512 and 522 of the left and right strikers 51 and 52 from directly above when the seat body is in the use position. .
The left and right mounting brackets 57, 58 have an open cross-sectional shape when viewed from above, and have a mounting surface for the locking device 56 along the front-rear, up-down direction, and a front and rear end of the mounting surface toward the side. and a raised flange. The left and right mounting brackets 57, 58 are both formed by press working from a single metal plate. Further, the left and right mounting brackets 57 and 58 are attached to the pipe frame 26 with their open sides facing each other.
The left and right mounting brackets 57, 58 have front and rear flanges extending above the mounting surface portion, and the inner surface of the upwardly extending portion is joined to the outer circumferential surface of the pipe frame 26 by welding or the like.

Since the left and right locking devices 56 have the same structure, only one locking device 56 will be described.
As shown in FIGS. 10 and 11, the lock device 56 includes a support plate 561, a cover body 562, a latch member 563, a ratchet member 564, a lever member 565, a spring 566, a release lever 567, and a load. It has a receiving member 568 and a fixing bracket 569.

The support plate 561 is made of a flat metal plate that extends along the front and back and up and down, with the locking device 56 being supported by the mounting bracket 57 or 58. The support plate 561 has a substantially rectangular shape when viewed from the side, and mounting arms extending forward and backward are formed at the front and rear ends of the support plate 561, respectively. The front and rear mounting arms are provided with through holes, through which fastening members such as bolts (not shown) are inserted and attached to the lower end of the mounting surface of the mounting bracket 57 or 58.

A flange that is bent toward the left is formed at the upper end of the support plate 561 .
A notch 561a is formed upwardly at the lower end of the support plate 561 at an intermediate position in the front-rear direction. The end portion 512 or 522 of the striker 51 or 52 is inserted into the notch 561a from below and held deep in the notch 561a.

The cover body 562 is made of a flat metal plate that extends along the front, back, top and bottom, with the locking device 56 supported by the mounting bracket 57 or 58. The cover body 562 has a substantially rectangular shape when viewed from the side, and has side walls raised toward the right at its front and rear ends, and from the right end of each side wall, there are walls extending forward and backward, respectively. A mounting arm is formed extending from the top. The front and rear attachment arms of the cover body 562 can be overlapped with the front and rear attachment arms of the support plate 561, and the front and rear attachment arms of the cover body 562 also have through holes through which the fastening members can be inserted.
As a result, the cover body 562 is placed on the left side of the support plate 561, the front and rear mounting arms of the support plate 561 and the cover body 562 are individually overlapped, and a fastening member is inserted into each through hole to overlap them. In this state, it can be attached to the lower end of the mounting surface of the mounting bracket 57 or 58.
In addition, since the cover body 562 has front and rear side wall portions, a gap is formed between the support plate 561 and the cover body 562 according to the length of the side wall portion, and each component of the locking device 56 is arranged. be able to.

The upper end of the cover body 562 is bent to form a flange that is raised toward the left and whose left tip is bent and extends upward. The upper end of the flange of the cover body 562 abuts the lower surface of the flange of the support plate 561.
A notch 562a is formed upwardly at the lower end of the cover body 562 at an intermediate position in the front-rear direction. This notch 562a is provided at a position overlapping with the notch 562a of the support plate 561 when viewed from the left and right, and its width and depth also match those of the notch 562a of the support plate 561.
The end portion 512 or 522 of the striker 51 or 52 is simultaneously inserted into the notch 561a of the support plate 561 and the notch 562a of the cover body 562 from below. The end portion 512 or 522 of the striker 51 or 52 is held by each structure of the lock device 56 disposed between the support plate 561 and the cover body 562.

FIG. 10 shows a locked state in which the locking device 56 holds the end 512 or 522 of the striker 51 or 52.
The latch member 563 is rotatably supported between the support plate 561 and the cover body 562 by a support shaft 563a extending in the left-right direction. The latch member 563 is formed with a notch 563b that can be rotated to overlap the notches 561a and 562a of the support plate 561 and the cover body 562. The end portion 512 or 522 of the striker 51 or 52 can be inserted into the latch member 563 with the notch 563b facing downward. Then, the striker 51 or 52 is rotated clockwise in FIG. 10 to enter a locked state in which the end 512 or 522 of the striker 51 or 52 is held with the notch 563b facing forward.

The latch member 563 is provided with a recess 563c that is engaged with the engagement protrusion 564c of the ratchet member 564 above the notch 563b in the locked state.
Further, the latch member 563 is provided with a support protrusion 563d that pivotally supports the lever member 565 at the upper end portion in the locked state posture. The support protrusion 563d extends to the left.

The ratchet member 564 is disposed next to the front of the latch member 563, and its lower end is pivotally supported by a support shaft 564a extending in the left-right direction. A through hole 564b is formed at the upper end of the ratchet member 564 to which the front end of a spring 566 is connected, and the spring 566 applies tension to the latch member 563 side. Further, the rear end of a release lever 567 is connected to the upper end of the ratchet member 564 together with a spring 566. The release lever 567 extends forward from the upper end of the ratchet member 564, and a release operation of manually pulling the release lever 567 forward is input from the front end of the release lever 567 (not shown).

A locking protrusion 564c that protrudes rearward is formed at an intermediate portion of the ratchet member 564 in the vertical direction. This locking protrusion 564c is urged by a spring 566 in the direction of entering into the recess 563c of the latch member 563, and as long as the locking projection 564c maintains the entered state, it rotates in the direction of releasing the locked state of the latch member 563 (see Fig. counterclockwise direction at 10).
Further, in the vicinity of the locking projection 564c of the ratchet member 564, an interlocking projection 564d for imparting rotation to the lever member 565 is provided. The interlocking protrusion 564d extends to the left.

As described above, the lever member 565 is rotatably supported by the support protrusion 563d of the latch member 563. The lever member 565 has one end extending upward and is connected to the rear end of the spring 566 described above. Further, the other end of the lever member 565 is curved and extends forward. A long hole 565a is formed at the other end of the lever member 565, into which an interlocking protrusion 564d of the ratchet member 564 is loosely inserted.
When the upper end of the ratchet member 564 rotates forward, the interlocking protrusion 564d slides against the upper inner edge of the elongated hole 565a of the lever member 565 and rotates the ratchet member 564 in the opposite direction. 565.

The load receiving member 568 is attached to the left side of the cover body 562 by a fixing bracket 569.
The load receiving member 568 is supported by the fixing bracket 569 so that the lower end thereof is located slightly below the depth of the notch 562a of the cover body 562, and is slightly movable up and down. The load receiving member 568 is arranged so that its upper end comes into contact with the lower surface of the flange of the cover body 562 when it moves upward.
As a result, when the end 512 or 522 of the striker 51 or 52 is inserted into the notch 562a, the end 512 or 522 comes into contact with the lower end of the load receiving member 568, and the upper end of the load receiving member 568 comes into contact with the cover body. It comes into contact with the lower surface of the flange of 562. Since the upper end of the flange of the cover body 562 is in contact with the lower surface of the flange of the support plate 561, the collision load from the end 512 or 522 is transmitted to the entire cover body 562 and the support plate 561 through the load receiving member 568. and can distribute the load.

The unlocking operation and locking operation of the locking device 56 having the above configuration will be explained. FIG. 10 shows a state in which the locking device 56 has locked the end portion 512 or 522 of the striker 51 or 52, as described above.
In this state, when the release lever 567 is pulled forward, the upper end of the ratchet member 564 rotates forward, and the locking protrusion 564c is pulled out of the recess 563c of the latch member 563. Thereby, the latch member 563 is in a state where it can be rotated in a direction in which the notch 563b is directed downward.
On the other hand, due to the rotation of the ratchet member 564, rotation in the opposite direction to that of the ratchet member 564 is input to the lever member 565 through the interlocking protrusion 564d. As a result, the upper end of the ratchet member 564 and the upper end of the lever member 565 are separated from each other, and the spring 566 is stretched and stored.

When the lever member 565 rotates in the above direction, the tension of the spring 566 causes the latch member 563 to rotate in the same direction as the rotation of the ratchet member 564 (counterclockwise in FIG. 10) through the support protrusion 563d. Forced. Therefore, when the upper end of the ratchet member 564 is pulled out from the recess 563c and the restricted state is released, the latch member 563 rotates so that the notch 563b faces downward.
Thereby, the lock device 56 can be brought into an unlocked state in which the end portion 512 or 522 of the striker 51 or 52 can be pulled out downward.

When you stop pulling the release lever 567 in this state, the outer edge of the ratchet member 564 below the locking protrusion 564c comes into contact with the flat outer edge of the upper end of the latch member 563 in FIG. It can be held with the notch 563b facing downward.

On the other hand, to lock the cushion frame 2, rotate the rear end of the cushion frame 2 downward, and insert the striker 51 or Push in the end 512 or 522 of 52. As a result, the latch member 563 is rotated clockwise in FIG. 10 against the tension of the spring 566, and when the end portion 512 or 522 of the striker 51 or 52 reaches near the deep part of the notch 561a or 562a, the latch member 563 is rotated clockwise in FIG. The locking protrusion 564c of the ratchet member 564 enters into the recess 563c of the member 563, and rotation is restricted with the notch 563b of the latch member 563 facing forward. Therefore, the end portion 512 or 522 of the striker 51 or 52 is held in a locked state in which it cannot move downward from the support plate 561 and the notches 561a, 562a of the cover body 562.

[Vehicle seat operation]
In the vehicle seat 1 having the above configuration, when the left and right locking devices 56 are operated to release the locking state of the left and right strikers 51 and 52 while the seat body is in the use position, the undulation springs 45B of the support mechanism 4 are activated. The cushion frame 2 is biased, and the rear end of the seat cushion pivots in a direction that flips upward, resulting in a forward-leaning posture as a moving position. At this time, when the operating lever 34 of the rail device 3 is operated to release the restraining state by the restraining member 33, the entire seat body can be moved forward. Thereby, the vehicle seat 1 is retracted forward, and a large space can be secured on the rear side of the vehicle seat 1. For example, if another vehicle seat is arranged immediately behind the vehicle seat 1, it becomes possible to easily get on and off the other vehicle seat. Furthermore, if the space immediately behind the vehicle seat 1 is a space for placing luggage, it becomes possible to easily take the luggage in and out of the space.

Further, when returning the vehicle seat 1 to its original position, the seat body is returned to its original position by the rail device 3, and the control lever 34 is operated to return the restraining member 33 to the restrained state.
Furthermore, when the rear end of the seat cushion is pushed down against the undulating spring 45B, the ends 512, 522 of the left and right strikers 51, 52 enter the notches 561a, 562a of the left and right locking devices 56, and the latch member 563 , and the seat body is held in the use position.

Note that the rail device 3 is provided with a spring or the like so that spring pressure is constantly applied to the seat body in the direction of forward movement, and the locking state is released by the release operation of the left and right lock devices 56 and the restraining member 33 of the rail device 3. The configuration may be such that the operation is linked with a wire or the like. As a result, by performing a release operation of the locking device 56 or a release operation of the locked state by the restraining member 33, it is possible to simultaneously perform a rotation operation in which the seat body is tilted forward and a forward movement operation of the seat body. becomes.

[Method for manufacturing vehicle seats]
Here, the method for manufacturing the vehicle seat 1 will be explained in order of steps.
The above manufacturing method includes a step of preparing a pair of lower rails 31 to be fixed to a floor material F as a floor of a vehicle, a step of preparing a pair of upper rails 32, and a step of preparing left and right locking devices 56, 56. A step of preparing a pair of strikers 51 and 52 that are engaged and released by left and right locking devices 56 and 56, and a step of preparing a pair of upper rails so that the pair of strikers 51 and 52 extend in a direction in which they approach each other. 32 and a step of connecting the pair of strikers 51 and 52 by a connecting member 55.

The left and right lower rails 31 prepared in the step of preparing the lower rails 31 are attached to the floor material F using front and rear attachment brackets 35 and 36, respectively. This step of attaching the lower rail 31 may be performed before the step of connecting the strikers 51 and 52 with the connecting member 55.

The left and right upper rails 32 prepared in the step of preparing the upper rails 32 are attached to the lower rails 31 by inserting them into the left and right lower rails 31 from one end, respectively. This step of attaching the upper rail 32 may be performed before or after the step of attaching the lower rail 31.

In the process of providing the pair of strikers 51 and 52 on the pair of upper rails 32, each striker 51 and 52 is provided on each upper rail 32 via striker support brackets 53 and 54.

After the step of attaching the upper rail 32, a step of attaching the restraining member 33 and the operating lever 34 to each upper rail 32, a step of attaching the support mechanisms 40A and 40B to each upper rail 32, etc. are performed.
Further, after the step of attaching the support mechanisms 40A, 40B, a step of attaching the support mechanisms 40A, 40B to the seat frame such as the cushion frame 2, a step of attaching the left and right locking devices 56 to the cushion frame 2, etc. are performed.
Furthermore, before and after the process of attaching the seat frame, a process of attaching a cushion pad and a cover is performed.

[Technical effects of embodiments of the invention]
In the vehicle seat 1, a pair of strikers 51 and 52 are provided on both sides of the cushion frame 2 in the left-right direction, and the pair of strikers 51 and 52 extend inward in the left-right direction and are connected by a connecting member 55. has been done.
Therefore, the load received from the seat body can be distributed to the two strikers 51, 52, and the support rigidity of each striker 51, 52 can be improved with a simple configuration.
In addition, the individual strikers 51 and 52 are individually supported by the left and right upper rails 32 in a cantilevered state, but the left and right strikers 51 and 52 are integrated by the connecting member 55 and supported in a dual-supported state. This makes it possible to further improve the support rigidity.

Further, since the connecting member 55 is configured separately from the strikers 51 and 52, it is possible to use the existing strikers 51 and 52. Moreover, it becomes easy to adjust the arrangement when attaching the connecting member 55, and it becomes possible to perform the assembly easily. Furthermore, it is advantageous in securing a mounting space for the connecting member 55.

Further, since the connecting member 55 has a closed cross-sectional shape, the connecting member 55 itself has high rigidity, and the supporting rigidity of the left and right strikers 51 and 52 can also be effectively improved. Furthermore, the connecting member 55 allows weight reduction.

Further, since the connecting member 55 has a cylindrical shape, it has high rigidity in any direction around the periphery, and it is possible to further improve the support rigidity of the left and right strikers 51 and 52.

Furthermore, since the pair of strikers 51 and 52 are both provided on the left and right upper rails via striker support brackets 53 and 54 that support a portion of the extension direction, the strikers 51 and 52 are directly connected to the upper rail 32. It is easier to optimize the joining method and shape, and it is possible to further improve the support rigidity of the strikers 51 and 52, compared to the case where the joining method and shape are optimized.

[Other examples of holding mechanisms]
Although the embodiment in which the strikers 51 and 52 are joined to the upper surfaces of the striker support brackets 53 and 54 has been exemplified, the present invention is not limited thereto.
FIG. 12 is a perspective view showing a holding mechanism 5A as another example in which the support structure for the strikers 51, 52 is different, FIG. 13 is a perspective view showing the strikers 51, 52 and other striker support brackets 53A, 54A, and FIG. It is a bottom view. In FIGS. 12 to 14, the symbol W indicates a joint location by welding or the like.

As shown in the holding mechanism 5A of FIG. 12, the left and right strikers 51 and 52 are located on the lower surface side of the left and right striker support brackets 53A and 54A, and are located between the striker support brackets 53A and 54A and the top plate portion 321 of each upper rail 32. It may also be placed between the top surface and the top surface.
The left striker support bracket 53A has two undulating portions 533A and 534A formed in the form of protrusions extending in the left-right direction with respect to the plate surface of the bracket 53A. The front undulating portion 533A is provided with a protrusion 535A connected to the rear side and having a low protruding height. Similarly, ridges 536A with a low protruding height are provided on the rear undulating portion 534A along the front side thereof.
The right striker support bracket 54A has two undulating portions 543A and 544A formed in the form of protrusions extending in the left-right direction with respect to the plate surface of the bracket 54A. The front undulating portion 543A is provided with a protrusion 545A connected to the rear side and having a low protruding height. Similarly, protrusions 546A with a low protruding height are provided on the rear undulating portion 544A along the front side thereof.
The protrusions 535A, 536A, 545A, 546A increase the rigidity of the undulating portions 533A, 534A, 543A, 544A due to their uneven structure.

As shown in FIG. 14, the left striker 51 has end portions 511 and 512 joined to the lower surface sides of undulating portions 533A and 534A of the striker support bracket 53A, respectively.
As shown in FIG. 14, the right striker 52 has end portions 521 and 522 joined to the lower surfaces of undulating portions 543A and 544A of the striker support bracket 54A, respectively.

Further, as shown in FIG. 13, the connecting member 55 is joined by welding or the like to the lower outer periphery of the front end portions 511, 521 of the left and right strikers 51, 52, respectively, near the left and right ends.
Further, the ends of the left and right ends of the connecting member 55 extend to the lower side of the striker support brackets 53A and 54A. The tip of the left end of the connecting member 55 is flattened and inserted between the end 511 of the striker 51 within the undulating portion 533A of the striker support bracket 53A and the top plate portion 321 of the upper rail 32. . Similarly, the right end of the connecting member 55 is compressed flat, and is inserted between the end 521 of the striker 51 within the undulating portion 543A of the striker support bracket 54A and the top plate portion 321 of the upper rail 32. has been done.
As shown in FIG. 14, the left and right ends of the connecting member 55 are also joined to the lower surfaces of the undulating portions 533A, 543A of the striker support brackets 53A, 54A by welding or the like.

In this way, each striker 51, 52 is disposed between the striker support bracket 53A, 54A and each upper rail 32, so that the end portions 511, 521 are moved in a direction away from the striker support bracket 53A, 54A. Since deformation and deformation are suppressed and peeling of the joints is suppressed, it is possible to improve the support strength of the strikers 51 and 52.
Furthermore, since the connecting member 55 is connected not only to the strikers 51 and 52 but also to the striker support brackets 53A and 54A, it connects the left and right strikers 51 and 52 with high strength and supports the left and right strikers 51 and 52. It becomes possible to further improve rigidity.

Regarding the manufacturing method of the vehicle seat 1 equipped with the holding mechanism 5A shown in FIGS. 12 to 14, in the step of providing the pair of strikers 51 and 52 on the pair of upper rails 32, the pair of strikers 51 and 52 are attached to the respective strikers. It is joined by welding to the lower side of the undulating portions 533A, 543A of the support brackets 53A, 54A.
Furthermore, in the step of connecting the pair of strikers 51 and 52 using the connecting member 55, the connecting member 55 is also joined to the pair of striker support brackets 53A and 54A by welding or the like.

[Solution 1]
A method for manufacturing a vehicle seat in which a seat body having a seat back serving as a backrest portion and a seat cushion serving as a seating portion can be switched between a use position where a seated person can sit and a moving position moved from the use position. There it is,
a step of preparing a pair of lower rails to be fixed to the floor of the vehicle;
preparing a pair of upper rails movably supported by the lower rail;
providing a lock device provided on the seat body to switch between the use position and the movement position;
preparing a pair of strikers that are provided on the upper rail side and that are engaged and released by the locking device when switching between the use position and the movement position;
providing a pair of the upper rails so that the pair of strikers extend toward each other;
A method for manufacturing a vehicle seat, comprising the step of connecting the pair of strikers using a connecting member.

Since Solution 1 includes the step of connecting the pair of strikers with a connecting member, it is possible to successfully manufacture a vehicle seat with high support rigidity in which the pair of strikers are supported at both ends.

[Solution 2]
In the step of providing the pair of strikers on the pair of upper rails,
The method for manufacturing a vehicle seat according to Solution 1, characterized in that each of the strikers is provided on the upper rail via a striker support bracket.

In Solution 2, each striker is provided on the upper rail via a striker support bracket, so it is possible to satisfactorily manufacture a vehicle seat that supports the pair of strikers with high rigidity.

[Solution 3]
In the step of connecting the pair of strikers by the connecting member,
The method for manufacturing a vehicle seat according to Solution 2, characterized in that the connecting member is also connected to the pair of striker support brackets.

Solution 3 also connects the connecting member to the pair of striker support brackets, so it is possible to satisfactorily manufacture a vehicle seat that supports the pair of strikers with high rigidity.

[Solution 4]
In the step of providing the pair of strikers on the pair of upper rails,
A method for manufacturing a vehicle seat according to Solution 2, characterized in that the pair of strikers is joined to the lower side of an undulating portion of each of the striker support brackets.

Solution 4 joins the pair of strikers to the lower side of the undulating portion of each striker support bracket, so it is possible to satisfactorily manufacture a vehicle seat that supports the pair of strikers with high rigidity.

1 Vehicle seat 2 Cushion frames 20, 21 Cushion side frames 200, 210 Webs 201, 202, 211, 212 Flanges 22, 23 Pipe frame support bracket 221 Web 222 Flange 223 Convex portion 231 Web 232 Flange 233 Steps 24 to 26 Pipe frame 27 Seat back support bracket 271 Web 272 Flange 273 Step 28 Pressure receiving member 3 Rail device 31 Lower rail 311 Bottom plate part 32 Upper rail 321 Top plate part 33 Stopping member 34 Operation lever 341 Interlocking shaft 342 Axis bracket 343 Input arm 344 Tension wires 35, 36 Installation Bracket 4 Support mechanism 40A, 40B Support mechanism 41A, 41B Support arm 411B Base plate part 412B Side wall part 42A, 42B Support shaft 43A First support bracket 43B Support bracket 431A Base part 431B Base plate part 432A Side wall part 432A Side wall part 432B Side wall part 44A 2 Support bracket 441A Board part 442A Side wall part 45B Luffing spring 46A Connecting pin 46B Block material 47 Connecting frames 5, 5A Holding mechanism 51, 52 Striker 511, 521 End part 512, 522 End part 513, 523 Connecting part 53, 54 Striker support Brackets 53A, 54A Striker support brackets 531, 541 Placing parts 532, 542 Extension parts 533A, 534A, 543A, 544A Relief parts 535A, 536A, 545A, 546A Convex strip 55 Connecting member 56 Lock device 561 Support plate 561a Notch 562 Cover body 562a Notch 563 Latch member 563a Support shaft 563b Notch 563c Recess 563d Support projection 564 Ratchet member 564a Support shaft 564b Through hole 564c Locking projection 564d Interlocking projection 565 Lever member 565a Long hole 566 Spring 567 Release lever 568 Load receiving member 569 Fixed bracket 57, 58 Mounting bracket F Floor material F1, F2 Foundation

Claims (7)

A vehicle seat in which a seat body having a seat back serving as a backrest portion and a seat cushion serving as a seating portion can be switched between a use position where a seated person can sit and a moving position moved from the use position. ,
a lower rail fixed to the floor of the vehicle;
an upper rail movably supported by the lower rail;
a locking device provided on the seat body and switching between the use position and the movement position;
a striker provided on the upper rail side and engaged and released by the locking device when switching between the use position and the movement position;
The lower rail, the upper rail, and the striker are provided as a pair on both sides in a direction intersecting the moving direction of the upper rail,
A vehicle seat characterized in that the pair of strikers extend in a direction in which they approach each other, and further includes a connecting member that connects the pair of strikers. The vehicle seat according to claim 1, wherein the connecting member is configured separately from the striker. The vehicle seat according to claim 1, wherein the connecting member has a closed cross-sectional shape. The vehicle seat according to claim 3, wherein the connecting member has a cylindrical shape. Each of the pair of strikers is provided on the upper rail via a striker support bracket that supports at least a portion of the striker in an extending direction. vehicle seat. 6. The vehicle seat according to claim 5, wherein the connecting member is also connected to the pair of striker support brackets. The striker support bracket has an undulating portion,
6. The vehicle seat according to claim 5, wherein the striker is joined to a lower side of the undulating portion.

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