JP2663812B2 - Turning type seat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bench-type directional changeable seat suitable for use as a vehicle seat for a train, for example, and more particularly to a seatback swinging on a seat cushion to change an upright position. The present invention relates to a direction-changing seat capable of freely changing a seating direction of the seat to a desired state.

[0002]

2. Description of the Related Art A bench seat used as a vehicle seat for a train or the like may be capable of arbitrarily selecting a seating direction for a seat according to a traveling direction of a train or according to a seater's preference or request. A turning structure is adopted. Examples of this type of direction-changing sheet include, for example,
Various structures have been proposed in the prior art, such as Japanese Patent Publication No. -24631 and Japanese Utility Model Application Laid-Open No. 2-8635.

Conventionally, as this type of direction-changing type seat, generally, a swing arm that supports the seat back in an upright state is pivotally supported on a supporting pedestal provided on the installation floor below the seat cushion. By oscillating the oscillating arm and positioning the seat back at the front and rear of the seat on the seat cushion, the seating direction of the seat can be arbitrarily changed.

For example, the former conventional example discloses a structure in which a swing arm that supports a seat back is caused to swing using a fluid pressure reciprocating mechanism. In this conventional example, the seat cushion is also swung along with the movement of the swing arm, so that an appropriate seating state is obtained when the seating direction of the seat is changed.

In the latter conventional example, a seat back is swingably supported by a swing arm on a supporting pedestal provided on an installation floor, and swings in conjunction with the swing arm. There is disclosed a seat structure in which a link arm is provided and a seat cushion is configured to be swingable on a support base.

By the way, in the direction-changing type seat as described above, the entire seat is stably supported at the lower center portion of the seat cushion at the lower portion of the seat, and the seat back is supported so as to be swingable in the front-rear direction of the seat. A supporting pedestal for providing a moving arm was provided.

In such a conventional direction-changing type seat, the position of the seat back standing on the seat cushion is changed to stabilize the swinging movement in the seat front-back direction when the seating direction is changed. The configuration was such that it could be obtained.

[0008]

However, in the above-mentioned conventional turning type seat, the lower portion of the seat cushion, which is a seating portion, is provided between the lower portion of the seat cushion and the vehicle floor, which is the seat installation floor.
It was necessary to provide a large supporting pedestal. Therefore, in such a seat, it is difficult to secure a luggage storage space below the seat cushion.

That is, in the conventional seat structure, it is difficult to obtain a luggage storage space for the occupant to place luggage, feet, etc. under the seat cushion due to the presence of the support pedestal. .

Further, in such a seat, there is a problem that the presence of the above-mentioned supporting pedestal becomes a hindrance when cleaning the inside of a vehicle such as a train. These problems are eliminated and the space under the seat is effectively used. It is desirable to take some measures that can be used.

In this type of direction-changing type seat, it is desired that the direction-changing structure by swinging the seat back and its operation be made as simple as possible. The structure is complicated and the operability is also a problem, and it cannot be said that anyone can change the direction very easily with a light force, and it is necessary to consider such points.

Further, what is required when constructing this kind of direction-changing type seat is that, as described above, the seating direction can be freely and reliably controlled by a simple operation by the swinging operation of the seat back. In conjunction with this, the seat cushion may also be swung to make it easier to sit at an angle of inclination, and some measures are taken to make such a direction-changing seat possible with a structure as simple as possible. It is desired to take it.

The present invention has been made in view of such circumstances, and has a very simple structure to secure a necessary and sufficient space between a seat lower surface and an installation surface, and to provide a seat back and a seat cushion. It is an object of the present invention to provide a direction-changing sheet having a simple structure that can be operated in a required state and can be easily operated.

[0014]

In order to meet such a demand, a directional turning sheet according to the present invention is provided with a cantilever supported by a leg standing on one side in a sheet width direction on an installation surface. A cantilever support rod extending toward the other side in the seat width direction, and a pair of seat support members provided along both sides of the seat at both ends of the support rod and supporting a seat cushion and a seat back, A direction changing type including a seat back supported by a pair of swing arms for each of the seat support members and swinging in the seat front-rear direction, and a seat cushion disposed to be bridged between the two seat support members. In the seat, front and rear interlocking shafts are supported between the seat support members, one end of a connection link is pivotally supported at a lower portion of the swing arm, and the other end of the connection link is connected via a first arm portion. Before and after each The swing link is connected to the end of the driving shaft, and pivotally supports a swing link via a connecting arm before and after the frame body constituting the seat cushion, and the other end of the swing link is connected via a second arm. To the front and rear interlocking shafts,
The seat cushion is supported on the seat support member so as to be able to swing, front and rear portions on both sides of the frame body are provided with hanging support pieces, and these support pieces are respectively provided when the frame body swings. An arc-shaped receiving portion for supporting the seat in a slidable manner is formed on an upper end edge of each of the seat support members.

[0015]

According to the present invention, the seat back is swung via the swing arm on the seat support members provided at both ends of the support rod which is cantilevered via the legs on the installation surface. Each of the seat cushions is supported via a swing link that is linked to the arm so as to be interlockable with the link, and the seat back is
By simply swinging the seat in the front-rear direction, the direction can be changed so that the required seating direction and seating posture including the seat cushion can be obtained.

That is, according to the present invention, the seat back
The rocking operation is performed by the rocking arm on the seat support member, and the movement is transmitted to the rocking link on the seat cushion side via a connection link linked to the rocking arm, thereby forming a frame constituting the seat cushion. The support cushion of the body frame slides on the arc-shaped receiving portion formed on the upper edge of the seat support member, whereby the seat cushion swings in the front-rear direction of the seat.

[0017]

1 to 8 show one embodiment of a direction-changing sheet according to the present invention. In these figures, the entirety indicated by reference numeral 1 with reference to FIGS. It is a bench seat type turning type seat used as a vehicle seat. As shown in FIG. 2, the direction-changing type seat 1 includes a seat cushion 2 and a seat back 3 erected on a front end or a rear end thereof, and is placed on a seat installation floor 4 of a train or the like. It is provided.

In FIG. 2, reference numeral 5 denotes a cabin wall of a train or the like, reference numerals 6 and 6 denote headrests at the upper end of the seat back 3, and reference numerals 7 and 7 denote armrests on both sides of the seat cushion 2.
The direction-changing type seat 1 has a well-known structure as a bench seat, but a detailed description thereof will be omitted.

Now, according to the present invention, the direction-changing sheet 1 as described above is provided as shown in FIGS.
It extends in the width direction of the seat 1 in a state of being cantilevered by a leg 11 provided upright on a portion of the installation floor surface 4 near one side in the width direction of the seat 1. A cantilever support rod 12, a pair of seat support members 13, 13 provided at both ends of the support rod 12 along the front and rear direction of the seat 1 to support the seat cushion 2 and the seat back 3; , 13 supported by a pair of swing arms 14, 15, respectively, and the seat back 3 swinging in the front-rear direction of the seat 1;
A frame frame 16 which constitutes the seat cushion 2 which is arranged to be bridged between the members 13; and swing links 17 which support the frame frame 16 on the seat support members 13 so as to be able to swing. , This swing link 17,
17 and connecting links 18, 18 that are operated in conjunction with the swing arms 14, 15 on the seat back 3 side.

According to such a configuration, the support rod 12 cantilevered on the installation floor 4 via the leg 11.
The seat back 3 (the seat back frame 19 constituting the seat back) is pivoted on the seat support members 13 provided at both ends of the swing arm 14 via swing arms 14 and 15.
The seat cushion 2 (the frame 16 constituting the seat cushion) is supported via swinging links 17, 17 operatively linked to the link 5 by connecting links 18, 18, and the seat back 3 is attached to the seat 1. 3 to 5, including the seat cushion 2, only the rocking operation in the front-back direction is performed to change the direction so as to obtain the required seating direction and seating posture. All the seating directions can be changed to any directions.

Further, according to the direction-changing type seat 1 of the present invention, the seat 1 is supported by the cantilever support rod 12 which is cantilevered with respect to the legs 11 erected on the installation floor 4. The structure which supports the whole is adopted. Therefore, in the turning type seat 1 according to the present invention, the installation floor surface 4 is provided under the seat cushion 2 despite the extremely simple structure.
A sufficient and sufficient space can be secured between the seat and the vehicle, and a luggage storage space for the occupant to place luggage, legs, etc. can be obtained, and the space under the seat can be effectively used.

In particular, according to the present invention, the leg portion 11 that cantileverly supports the support rod 12 that supports the entire seat 1 is located on the side of the cabin wall 5 of a train or the like, so that there is no obstruction on the side of the passage. The presence of the member can be eliminated, thereby greatly improving the workability at the time of cleaning.

Here, as is apparent from FIGS. 8A, 8B and 8C, the leg portion 11 is formed of an aluminum alloy or a steel material having a substantially rectangular cross section, and is installed. It is bolted to the floor 4 at a plurality of locations, and also bolted to the support rod 12 at a plurality of locations. Further, in this leg portion 11, a locking portion 11a provided at a lower end portion opposite to the extending direction of the support rod 12 is connected to the installation floor surface 4 side as shown in FIGS. The support rod 1 is locked by a locking member 20 integrally or integrally provided on the support rod 1.
The entire sheet 1 including the sheet 2 is cantilevered with sufficient strength.

As is clear from FIGS. 6 and 7, the supporting rod 12 is made of an aluminum alloy frame or a steel frame having a substantially rectangular cross section having a predetermined strength, similarly to the leg 11 described above. And the seat support members 13 are provided at both left and right ends thereof.

Here, the seat support member 13 is shown in FIGS.
As shown in FIG. 7 to FIG. 7, the sheet has a shape extended in the front-rear direction of the seat by an aluminum alloy frame or a steel material frame, and has a front end portion and a rear end portion having an inclined portion inclined upward. Is formed. In FIGS. 6A, 6B and 6C, reference numeral 21 denotes a support rod 12.
Is a clamp member that cooperates with a seat support member 13 provided to be fitted into the end portion thereof to fix and hold the bolt.
Has been fixed by. Thereby, the seat support member 1
The support members 13 and 13 are detachably fixed to both ends of the support rod 12 to simplify the support structure including the leg 11 and the support rod 12 and to improve workability and assemblability. It is.

According to the present invention, the upper and lower edges of the front and rear inclined portions of the seat support members 13, 13 are shown in FIG.
As is clear from FIGS. 3 to 5, the seat cushion 2
Arc-shaped receiving portions for supporting substantially triangular support pieces 25, 25 provided on the front and rear portions on both sides of the frame body frame 16 in a slidable state when the frame body frame 16 swings. 26, 26 are formed.

Here, of the support pieces 25, 25, the front one has a shape having an inclined surface inclined obliquely rearward, and the rear one has an inclined surface inclined obliquely forward. It is formed in a shape having a surface. Each of these inclined surfaces slides on the arc-shaped receiving portions 26, 26, so that the seat cushion 2 by the frame body frame 16 is moved.
However, as is apparent from FIGS. 3 to 5, it is formed in an arcuate surface shape that swings in the seat front-rear direction. The shape of the inclined arc surface between the support piece 25 and the arc-shaped receiving portion 26 may be arbitrarily selected depending on the swing motion of the seat cushion 2 and the sitting posture at the time of sitting.

According to such a structure, the seat back 3
However, the swinging arms 14 and 15 allow the seat support members 13 and
13, and the movement is performed via connecting links 18, 18 interlocking with the swing arms 14, 15.
The support pieces 25, 25 of the frame 16 constituting the seat cushion 2 are transmitted to the swinging links 17, 17 on the side of the seat cushion 2, and thereby the seat support members 13, 1
When the seat cushion 2 slides along the sliding surfaces on the arc-shaped receiving portions 26, 26 formed at the upper end edge of the seat cushion 3, the front end or the rear end of the seat cushion 2 jumps upward. Thus, the seat 1 is swung in the front-back direction.

Accordingly, the seat cushion 2 swings in accordance with the swinging operation of the seat back 3 so as to obtain a predetermined sitting posture, and the support pieces 25 of the frame 16 are seated by the seat support members. Since it is always slidably supported on the arc-shaped receiving portions 26 on the 13th and 13th sides, the occupant can be seated in a required posture and with required strength. In addition, there is no fear that a rattling problem occurs during the operation of the seat cushion 2, and this is effective in obtaining stability during operation.

Further, according to the present invention, the seat support member 1
Supporting pieces 2 on the frame body 16 side at the upper end edges of 3, 13
The swing arms 14, 15 for swingably supporting the seat back 3 on the seat support members 13, 13 are engaged at the swing end positions at side positions close to the arc-shaped receiving portions 26, 26 supporting the seats 5, 25. Stoppers 27, 27 for stopping are formed.

With such a configuration, the seat back 3 is provided with swing arms 14 and 15 for swinging the seat back 3.
Is locked by stoppers 27, 27 provided on the upper end edges of the seat support members 13, 13, with a required inclination angle at the swing end position, and the occupant leans. Load can be supported.

Further, in this embodiment, the stopper 27
Is provided adjacent to the outside of the arc-shaped receiving portion 26, and has a function of preventing the support piece 25 of the frame body frame 16 from being displaced by a step due to the stopper 27, whereby the seat cushion 2 is stabilized. This can be effective in obtaining a support state.

In addition, according to the above-described direction-changing type seat 1, the connecting links 18, 18 interlocking with the swing arms 14, 15, which swingably support the seat back 3 on the seat support members 13, 13, are provided. Before and after supporting the support rod 12 between the seat support members 13 and 13 and avoiding the support rod 12, it is connected to the ends of the rear interlocking shafts 30 and 31, and these interlocking shafts 3
The swing links 17, 17 for swinging the frame body 16 on the seat cushion 2 side on the seat support members 13, 13 are connected to a part of 0, 31.

That is, the interlocking shafts 30, 31 are supported by the left and right seat support members 13, 13 at both ends thereof, and the first arm portions 32, 32 fixed to the ends thereof are connected to each other by the connection. Linked with the links 18, 18 and the interlocking shafts 30, 3
Second arm portions 33, 33 provided at the center in the axial direction of the first arm.
Are connected to the swing links 17. The other ends of the oscillating links 17 and 17 are connected to the frame body 16.
In consideration of the positional relationship between the frame body 16 and the interlocking shafts 30, 31 which are connected to the connecting arm portions 34, 34 provided on the side and are arranged so as to avoid the support rod 12 as described above, a substantially crescent moon is provided. It is formed so as to exhibit a shape.

In such a configuration, the seat back 3 is swingably supported on the seat support members 13, 13, so that the movement of the connecting links 18, 18 interlocked with the swing arms 14, 15 is reduced. The frame 16 on the side of the seat cushion 2 is placed on the seat support members 13 and 13 via interlocking shafts 30 and 31 which are supported between the seat support members 13 and 13 at positions avoiding the cantilever support rods 12. Thus, the seat back 3 and the seat cushion 2 can be operated in conjunction with a required state.

Here, the above-described interlocking shafts 30, 31 and swing links 17, 17, interlocking links 18, 18, frame body frame 16 of swing arms 14, 15, seat support members 13, 1
For example, the swinging arms 14 and 15 are
The supporting shafts 13, 31 having the second arm portions 33, 33 are pivotally supported by the seat support members 13, 13, and the first arm portions 32, 32 are pivotally supported by the seat supporting members 13, 13.
By attaching the connecting links 18 and 18 and connecting the swinging links 17 and 17 to the connecting arms 34 on the frame body 16 side, this can be easily performed.

The lower ends of the swing arms 14 and 15 are arranged in parallel with the support rod 12 at the center of the seat support members 13 and 13, as is apparent from FIGS. On the other hand, the other end is pivotally supported at both front and rear ends of pivot arm portions 37 provided at the lower end of the seat back 3. Here, the pair of swing arms 14,
When the length of the seat back 15 is changed, the inclination angle of the seat back 3 changes, and the length ratio may be set to a predetermined value so that the seated person can easily sit.

The direction changing operation of the direction changing type seat 1 having the above-described structure is performed by moving the seat back 3 forward or backward of the seat 1 as is apparent from FIGS. In conjunction with this, the seat cushion 2 can also swing.
Its advantages will be easily understood. In particular, in the present invention, since the entire seat 1 is supported in a well-balanced manner with respect to the seat support members 13 provided at both ends of the support rod 12, the above-described direction change involves moving the seat back 3 with one hand. By simply doing so, it can be performed in a well-balanced, easy and appropriate manner, and is excellent in operability.

The present invention is not limited to the structure of the embodiment described above, and the shape, structure, etc. of each part of the direction-changing sheet 1 can be freely modified and changed as necessary. Various modifications may be considered depending on the situation.

[0040]

As described above, according to the direction-changing seat according to the present invention, the front and rear interlocking shafts are supported between the seat support members, and one end of the connecting link is provided at the lower portion of the swing arm. And the other end of the connection link is connected to the end of the front and rear interlocking shafts via a first arm, respectively, via the connection arm between the front and rear of the frame frame constituting the seat cushion. To pivot the swinging link, and connect the other end of the swinging link to the front and rear interlocking shafts via a second arm, respectively, so that the seat cushion can swing on the seat support member. Supporting, the front and rear portions of both sides of the frame frame, the supporting piece is provided hanging down, and the arc-shaped receiving portion that supports these supporting pieces in a slidable state at the time of the swing motion of the frame body frame, Extremely simple because it is formed at the upper edge of each seat support member Despite the structure, the entire seat is cantilevered, so the space between the seat and the installation surface at the bottom of the seat is necessary and sufficient, and the seat back and seat cushion are turned in the required state. In addition to this, various excellent effects such as easy operation can be achieved.

In particular, according to the present invention, the supporting pieces are hung down on the front and rear portions on both sides of the frame, and the supporting pieces are slidably supported in the swinging operation of the frame. Since the arc-shaped receiving portion is formed at the upper end edge of each seat support member, the seat cushion is interlocked with the swinging motion of the seat back, and the support pieces of the frame body frame constituting the seat cushion are
By performing a stable sliding operation on the arc-shaped receiving portion at the upper edge of the seat support member, it is possible to perform a swing operation in the front-rear direction of the seat and to obtain a stable required sitting posture in any posture. Can be. That is, not only can the seated person be seated in a required posture state and with a required strength, but also there is no possibility of causing a rattling problem during the operation of the seat cushion, and it is effective in obtaining stability during operation. It is a target.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view for explaining a main structure showing an embodiment of a direction-changing sheet according to the present invention.

FIG. 2 is a schematic front view showing one embodiment of a direction-changing sheet according to the present invention.

FIG. 3 is a schematic explanatory view for explaining a main structure of the present invention.

FIG. 4 is a schematic diagram illustrating a seat back operation from FIG. 3;

FIG. 5 is a schematic diagram illustrating a seat back state operated through FIGS. 3 and 4;

6 (a), (b), and (c) are main part plan views showing the relationship between a seat support member and a cantilever support rod that characterize the present invention, and are cross-sectional views taken along line BB and CC. FIG.

FIGS. 7A and 7B show the relationship between the cantilever support rod and the seat support member in the turning type seat according to the present invention.
The schematic explanatory drawing shown by (c).

FIG. 8 shows the legs supporting the cantilever support rod,
The schematic diagram shown by (b) and (c).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Direction change type seat 2 Seat cushion 3 Seat back 4 Installation floor surface 11 Leg part 12 Cantilever support rod 13 Seat support member 14 Swing arm 15 Swing arm 16 Frame body 17 Swing link 18 Connection link 19 Seat back frame Reference Signs List 20 locking member for leg 25 support piece 26 arc-shaped receiving portion 27 stopper 30 front interlocking shaft 31 rear interlocking shaft 32 first arm 33 second arm 34 connecting arm

Claims (1)

(57) [Claims] 1. A cantilever support rod extending toward the other side in the sheet width direction while being cantilevered by a leg standing on one side in the sheet width direction on an installation surface, and A pair of seat support members provided at both ends of the support rod along the seat longitudinal direction to support a seat cushion and a seat back, and each of the seat support members is supported by a pair of swing arms, respectively, and swings in the seat longitudinal direction. In a direction changeable seat including a seat back to be operated and a seat cushion disposed to be bridged between the two seat support members, a front and rear interlocking shaft is pivotally supported between the seat support members, and the swing is performed. A frame frame that constitutes the seat cushion by pivotally supporting one end of a connecting link at a lower portion of the arm, and connecting the other end of the connecting link to ends of front and rear interlocking shafts via a first arm, respectively. Before and after The swing link is pivotally supported via an arm portion, and the other end of the swing link is connected to the front and rear interlocking shafts via a second arm portion, respectively, and the seat cushion is mounted on the seat support member. Supporting swing operation, front and rear of both sides of the frame body, provided a support piece hanging down,
In addition, an arc-shaped receiving portion for supporting each of the support pieces in a slidable state during a swing operation of the frame body frame is formed at an upper end edge of each of the seat support members.