JPH06135268A - Direction changeable seat - Google Patents

Abstract

PURPOSE:To ensure a sufficient space for the lower part of a seat and to change the direction of a seat back or a seat cushion in a simple manner. CONSTITUTION:A cantilever support rod extending widthwise of a seat is cantilever-supported to a leg part planted on an installation floor surface. A pair of seat support members 13, 13 for supporting a seat cushion 2 and a seat back 3 which is supported to left and right support members by means of a pair of swingable arms 14, 15, respectively. A frame 16 for the seat cushion are supported to the swingable arms by means of swingable links 17, 17 which are associated with each other through the intermediary of coupling links 18, 18. Support pieces 25, 25 are suspended respectively from the front and rear end part of opposite sides of the frame 16. Arcuate receiving parts 26, 26 which swingably support the support pieces, respectively, are formed on the upper edge parts of the seat support members.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bench type turning seat which is suitable for use as a vehicle seat such as a train, and more particularly, a seat back is swung on a seat cushion to change the standing position. Thus, the present invention relates to a direction-changing seat that allows the seating direction to the seat to be freely changed to a desired state.

[0002]

2. Description of the Related Art For a bench seat used as a vehicle seat for a train or the like, the seating direction of the seat can be arbitrarily selected according to the traveling direction of the train or the preference and demand of a seated person. A turning structure has been adopted. An example of this type of direction-changing sheet is,
Various structures have been proposed in the past, including No. 24631 and Japanese Utility Model Laid-Open No. 2-8635.

Conventionally, as a direction-changing type seat of this type, a swinging arm for supporting the seat back in an upright state is rotatably supported by a supporting pedestal provided on the floor under the seat cushion. By oscillating the swing arm and positioning the seat back on the seat cushion in front of and behind the seat, the seating direction on the seat can be arbitrarily changed.

For example, the former conventional example discloses a structure in which a rocking arm that supports a seat back is rocked 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 can be obtained when the seating direction of the seat is changed.

In the latter conventional example, the seat back is swingably supported by a swing arm on a support pedestal provided on the floor of the installation, and the seat back 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 supporting pedestal.

By the way, in the above-described direction-changing type seat, the whole seat is stably supported at the lower central portion of the seat cushion at the lower part of the seat, and the seat back is rockably supported in the seat longitudinal direction. There was a supporting pedestal for the moving arm.

In such a conventional direction-changing seat, the seat back is changed in the standing position on the seat cushion to stabilize the swinging motion in the seat longitudinal direction when the seating direction is changed. It was a structure that can be obtained by.

[0008]

However, in the above-described conventional direction-changing seat, between the seat cushion lower part which is the seating part and the vehicle floor which is the seat installation floor,
It was necessary to provide a large-scale support base. Therefore, in such a seat, it is difficult to secure a luggage storage space under the seat cushion.

That is, in the conventional seat structure, due to the existence of the supporting pedestal, it is difficult to obtain a luggage storage space for a seated person to put a luggage or put a foot or the like under the seat cushion. .

Further, in such a seat, there is also a problem that the presence of the above-mentioned supporting pedestal becomes an obstacle when cleaning the inside of a vehicle such as a train. Therefore, these problems are eliminated and the space under the seat is effectively reduced. It is desirable to take some measures to enable utilization.

In this type of direction change seat, it is desired that the direction change structure by swinging the seat back and its operation be as simple as possible. However, in the conventional seat structure, the direction change mechanism or the like is used. The structure is complicated and it is a problem in terms of operability, and it cannot be said that anyone can change the direction very easily with a light force, and it is necessary to consider such a point.

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

The present invention has been made in view of the above circumstances, and has a very simple structure to secure a necessary and sufficient space between the lower surface of the seat and the installation surface, and to secure the seat back and seat cushion. The purpose of the present invention is to obtain a direction-changing type seat having a simple structure in which the direction-changing operation can be performed in a required state and the operation can be performed easily.

[0014]

In order to meet such a demand, the direction-changing seat according to the present invention is oriented in the seat width direction while being cantilevered by the leg portions standing on the installation surface. An extended cantilevered support rod, a pair of seat support members provided at both ends of the support rod along the seat front-rear direction to support a seat cushion and a seat back, and a pair of seat support members for each seat support member. A seat back that is supported by a swing arm and swings in the front-rear direction of the seat, a frame body frame that is placed between both seat support members to serve as a seat cushion, and this frame body frame is used as the seat support member. A swing link for supporting the swing motion above and a connecting link for operating the swing link and the swing arm on the seat back side in conjunction are provided. An arcuate receiving portion is formed at the upper end edge of each seat support member for suspending supporting pieces on the front and rear sides and supporting these supporting pieces in a slidable state during the swing motion of the frame body. It is a thing.

Further, according to the present invention, the seat supporting member is swingably supported at the seat supporting member at a position near the arcuate receiving portion for supporting the supporting piece on the frame body frame side at the upper edge of the seat supporting member. A stopper is formed to lock the moving arm at the swing end position.

[0016]

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 swinging link that is linked to the arm by a linking link, and the seat back is
It is possible to change the direction including the seat cushion only by swinging the seat in the front-rear direction so that a desired seating direction and seating posture can be obtained.

That is, according to the present invention, the seat back is
The rocking arm is rocked on the seat support member, and this motion is transmitted to the rocking link on the seat cushion side through a connecting link interlocking with the rocking arm, thereby forming a seat cushion. The supporting piece of the body frame slides on the arcuate receiving portion formed on the upper edge of the seat supporting member, so that the seat cushion swings in the seat front-rear direction.

Further, according to the present invention, in the seat back, the swing arm for swinging the seat back is locked by the stopper provided at the upper edge of the seat supporting member, so that the swing end is formed. Locked and held in position.

[0019]

1 to 8 show one embodiment of the direction change type seat according to the present invention. In these figures, the one designated by reference numeral 1 in FIG. 1 and FIG. It is a bench seat type turning type seat used as a vehicle seat. As shown in FIG. 2, the direction-changing seat 1 includes a seat cushion 2 and a seat back 3 standing upright at the front end or the rear end of the seat cushion 2, and is placed on a seat installation floor surface 4 of a train or the like. Is provided.

In FIG. 2, reference numeral 5 is a wall surface of a passenger compartment of a train or the like, 6 and 6 are headrest portions at the upper end of the seat back 3, and 7 and 7 are armrests on both sides of the seat cushion 2.
The direction-changing seat 1 has a well-known structure as a bench seat, but its detailed description is omitted.

According to the present invention, the direction-changing sheet 1 as described above is provided as shown in FIGS.
The seat 1 extends in the width direction of the seat 1 in a cantilevered manner on a leg portion 11 provided upright on one side in the width direction of the seat 1 on the installation floor surface 4. A cantilevered support rod 12, a pair of seat support members 13 and 13 provided along the front-rear direction of the seat 1 at both ends of the support rod 12, and supporting a seat cushion 2 and a seat back 3, and these seat support members 13 , 13 are supported by a pair of swing arms 14 and 15, respectively, and the seat back 3 is swung in the front-rear direction of the seat 1, and the seat support members 13,
A frame body frame 16 that is arranged so as to be stretched between 13 and configures the seat cushion 2, and swing links 17 and 17 that support the frame body frame 16 on the seat support members 13 and 13 so as to be swingable. This swing link 17,1
7 and the connecting links 18, 18 that are operated in conjunction with the swing arms 14, 15 on the seat back 3 side.

According to this structure, the supporting rod 12 is cantilevered on the installation floor 4 via the legs 11.
The seat back 3 (the seat back frame 19 constituting the seat back 3) is mounted on the seat support members 13, 13 provided at both ends of the rocking arms 14, 1 via the rocking arms 14, 15.
The seat cushion 2 (the frame body frame 16 which constitutes the seat cushion 2) is supported via the swing links 17 and 17 that are movably connected to the vehicle 5 by the connecting links 18 and 18, respectively, and the seat back 3 is attached to the seat 1. As is clear from FIGS. 3 to 5, the seat cushion 2 and the seat cushion 2 are swung in the front-rear direction to change the direction so that a desired seating direction and seating posture can be obtained. The seating direction can be changed to any direction.

Further, according to the direction-changing type seat 1 according to the present invention, the seat 1 is provided by the cantilever support rod 12 which is cantilevered with respect to the leg portion 11 standing on the installation floor surface 4. The structure that supports the whole is adopted. Therefore, in the direction-changing seat 1 according to the present invention, the installation floor surface 4 is provided below the seat cushion 2 despite the extremely simple structure.
A necessary and sufficient space can be secured between the seat and the seat, and it is possible to obtain a luggage storage space in which the seated person can put luggage, put feet, etc., and the space under the seat can be effectively utilized.

In particular, according to the present invention, the leg 11 for supporting the supporting rod 12 supporting the entire seat 1 in a cantilevered manner is located on the side of the wall surface 5 of the passenger compartment of the train or the like, thereby obstructing the passage. The presence of the member can be eliminated, and the workability during cleaning can be greatly improved.

Here, as is apparent from FIGS. 8 (a), 8 (b) and 8 (c), the above-mentioned leg 11 is formed of an aluminum alloy or steel material having a substantially square cross section, and is installed. It is bolted to the floor surface 4 at a plurality of points and also to the support rod 12 at a plurality of points. Further, in this leg portion 11, as shown in FIGS. 2 and 8 (b), the locking portion 11a provided at the lower end portion opposite to the extending direction of the support rod 12 is provided on the installation floor surface 4 side. The locking rod 20 is integrally or integrally provided on the support rod 1 so that the support rod 1
The entire seat 1 including the seat 2 is configured to be cantilevered with sufficient strength.

Also, as is apparent from FIGS. 6 and 7, the supporting rod 12 is also made of an aluminum alloy frame or a steel material frame having a substantially square cross section with a predetermined strength, as is the case with the leg portion 11 described above. And the seat support members 13, 13 are provided at both left and right ends thereof.

Here, the seat support member 13 is the same as that shown in FIGS.
As shown in FIG. 7, the aluminum alloy frame or the steel frame has a shape extending in the seat front-rear direction, and the front end portion and the rear end portion thereof have inclined portions that are inclined upward. Has been formed. In FIG. 6, (a), (b) and (c), reference numeral 21 is a support rod 12.
Is a clamp member for fixing and holding in cooperation with the seat support member 13 provided by being fitted to the end portion of the bolt 22.
Is fixed by. Thereby, the seat support member 1
3, 13 are detachably fixed to both ends of the support rod 12, and can simplify the support portion structure including the leg portion 11 and the support rod 12 and improve workability and assemblability. Is.

According to the present invention, the seat cushion 2 is formed at the upper and lower edge portions of the front and rear inclined portions of the seat support member 13 as is apparent from FIGS. 1 and 3 to 5. The substantially triangular support pieces 25, which are provided on the front and rear sides of both sides of the frame body frame 16, are provided on the frame body frame 16.
The circular arc-shaped receiving portions 26, 26 are formed so as to support each of them in a slidable state during the swing operation.

The front side of the above-mentioned supporting pieces 25, 25 has a shape having an inclined surface which is inclined rearward, and the rear side is inclined obliquely toward the front. It is formed in a shape having a surface. It should be noted that each of these inclined surfaces slides on the arcuate receiving portions 26, 26 so that the seat cushion 2 formed by the frame body frame 16 is moved.
However, as is clear from FIGS. 3 to 5, it is formed in an arc surface shape so as to swing in the seat front-rear direction. The inclined arcuate surface shape of the support piece 25 and the arcuate 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, due to the swing arms 14 and 15, the seat support member 13,
13 is oscillated, and this movement is interlocked with the oscillating arms 14 and 15 via connecting links 18 and 18,
The supporting pieces 25, 25 of the frame body frame 16 constituting the seat cushion 2 are transmitted to the swing links 17, 17 on the seat cushion 2 side, whereby the seat supporting members 13, 1 are formed.
By sliding along the sliding surface on the arcuate receiving portions 26, 26 formed at the upper edge of the seat cushion 3, the seat cushion 2 is in a state where the front end portion or the rear end portion jumps upward. As described above, the swing operation is performed in the front-back direction of the seat 1.

Therefore, the seat cushion 2 swings so as to obtain a predetermined sitting posture in accordance with the swinging motion of the seat back 3, and the supporting pieces 25, 25 of the frame body frame 16 are seat supporting members. Since it is supported in a slidable state on the arcuate receiving portions 26, 26 on the 13th and 13th sides, the seated person can be seated in a desired posture state and with a required strength. Further, there is no risk of rattling problem during operation of the seat cushion 2, and it is effective in obtaining stability during operation.

Further, according to the present invention, the seat support member 1
The support piece 2 on the side of the frame body 16 at the upper edges of the frames 3 and 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 the side positions close to the arcuate receiving portions 26, 26 supporting the 5, 5, 25. Stoppers 27, 27 for stopping are formed.

With such a structure, the seat back 3 has the swing arms 14 and 15 for swinging the seat back 3.
Is locked by the stoppers 27, 27 provided at the upper edge portions of the seat support members 13, 13 to be locked and held at the swing end position with a required inclination angle, and the seated person leans. It is possible to support the load caused by this.

Further, in this embodiment, the stopper 27
Is provided adjacent to the outside of the arcuate receiving portion 26, and this stopper 27 also has a function of preventing the position shift of the supporting piece 25 of the frame body frame 16 by the step difference, thereby stabilizing the seat cushion 2. It can be effective in obtaining a supportive state.

Further, according to the above-mentioned direction-changing seat 1, the connecting links 18, 18 interlocking with the swing arms 14, 15 for swingably supporting the seat back 3 on the seat support members 13, 13 are provided. , The front and rear interlocking shafts 30 and 31 which are hung around the support rods 12 between the seat supporting members 13 and 13 and are pivotally supported.
The rocking links 17 and 17 for swinging the frame body frame 16 on the seat cushion 2 side on the seat support members 13 and 13 are connected to a part of 0 and 31.

That is, in the interlocking shafts 30 and 31, both ends of the interlocking shafts 30 and 31 are axially supported by the left and right seat supporting members 13 and 13, and the first arm portions 32 and 32 fixed to the ends are connected to each other. Linked with the links 18 and 18, the interlocking shafts 30 and 3
The second arm portions 33, 33 provided at the central portion in the axial direction of 1
Is connected to the swing links 17, 17. The swing links 17, 17 have a frame body frame 16 at the other end.
In consideration of the positional relationship between the frame body frame 16 and the interlocking shafts 30 and 31 arranged avoiding the support rod 12 as described above, the crescent frame is connected to the connecting arm portions 34 and 34 provided on the side. It is formed to have a shape.

In such a structure, the seat back 3 is swingably supported on the seat support members 13 and 13, whereby the movement of the connecting links 18 and 18 interlocked with the swing arms 14 and 15 is The frame body frame 16 on the side of the seat cushion 2 is mounted on the seat support members 13 and 13 via interlocking shafts 30 and 31 which are hung and supported by the seat support members 13 and 13 at positions avoiding the cantilever support rod 12. The seat back 3 and the seat cushion 2 can be operated in conjunction with a desired state by being transmitted to the swing links 17 for swinging.

Here, the interlocking shafts 30 and 31, the swing links 17 and 17, the interlocking links 18 and 18, the frame body frame 16 of the swing arms 14 and 15, the seat support members 13 and 1 described above.
Assembling order to the 3 is, for example, rocking arms 14 and 15,
The seat support members 13 and 13 are pivotally supported, and then the interlocking shafts 30 and 31 having the second arm portions 33 and 33 are pivotally supported to the seat support members 13 and 13, and the first arm portions 32 and 32 are supported thereby.
This can be easily performed by fixing and fixing the connecting links 18, 18 and connecting the swinging links 17, 17 to the connecting arm portions 34, 34 on the frame body frame 16 side.

The lower ends of the swinging arms 14 and 15 are arranged in parallel with the supporting rod 12 at the center of the seat supporting members 13 and 13, as is clear from FIGS. 1 and 3 to 5. While the other end is pivotally supported, the other end is pivotally supported at the front and rear ends of the pivot arm portions 37, 37 provided at the lower end side of the seat back 3. Here, the pair of swing arms 14,
When the length of 15 is changed, the inclination angle of the seat back 3 changes, and it is advisable to set the length ratio to a predetermined value so that the seated person can easily seat.

Then, the direction changing operation in the direction changing type seat 1 having the above-mentioned structure is performed by moving the seat back 3 to the front or rear of the seat 1, as is clear from FIGS. 3 to 5. In conjunction with this, the seat cushion 2 can also swing.
The advantages will be easily understood. Particularly, in the present invention, the entire seat 1 is supported by the seat supporting members 13, 13 provided at both ends of the supporting rod 12 in a well-balanced manner. Therefore, in the above-described direction change, the seat back 3 is moved by one hand. It is a well-balanced, easy and appropriate one that can be performed simply by making it perform, and has excellent 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 change type seat 1 can be freely modified or changed as needed, and the application of the seat 1 is possible. Various modifications may be considered according to the above.

[0042]

As described above, according to the direction-changing type seat according to the present invention, it can be extended in the seat width direction while being cantilevered by the legs standing on the installation surface. A cantilevered support rod, a pair of seat support members provided at both ends of the support rod along the seat front-rear direction to support a seat cushion and a seat back, and a pair of swing arms for each of these seat support members. A seat back that is supported and swingably moves in the front-rear direction of the seat, a frame body frame that is placed between both seat support members to serve as a seat cushion, and a swing motion of the frame body frame on the seat support member. Since it has a swing link that can be supported and a connecting link that operates in conjunction with the swing link and the swing arm on the seat back side, it has an extremely simple structure. Nevertheless, since the whole seat is supported by a cantilever, a space between the installation surface and the lower part of the seat is necessary and sufficient, and the seat back and seat cushion can be turned in a required state. The operation has various excellent effects such as easy operation.

In particular, according to the present invention, the supporting pieces are hung on the front and rear sides of both sides of the frame body, and these supporting pieces are slidably supported when the frame frame swings. Since the arcuate receiving portion is formed on the upper end edge of each seat supporting member, the seat cushion is interlocked with the swing motion of the seat back, and the supporting piece of the frame body frame forming the seat cushion is
By stably sliding on the arcuate receiving portion at the upper edge of the seat support member, it is possible to perform a swing operation in the seat front-rear direction and to obtain a stable required sitting posture in any posture. You can That is, not only can the seated person be seated in a desired posture and with a required strength, but there is no risk of rattling problems during the operation of this seat cushion, and it is also effective in obtaining stability during operation. Target.

Further, according to the present invention, the seat back can be swung on the seat supporting member at a position close to the arcuate receiving portion for supporting the supporting piece on the frame body frame side at the upper edge of the seat supporting member. Since a stopper that locks the supporting swing arm at the swing end position is formed, the movement of the seat back is restricted within a predetermined swing motion range, and the load caused by the seated person leaning against the seat back is supported and seated. There is an advantage that the seated posture of the seat back can be maintained at a stable time.

[Brief description of drawings]

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

FIG. 2 is a schematic front view showing an embodiment of the direction changeable sheet according to the present invention.

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

FIG. 4 is a schematic diagram illustrating a seatback operation from FIG.

FIG. 5 is a schematic diagram illustrating a seat back state that has been operated through FIGS. 3 to 4;

FIG. 6 is a plan view of a main part showing a relationship between a seat support member and a cantilever support rod, which characterizes the present invention, and a cross-sectional view taken along line BB and CC of FIG. Fig.

FIG. 7 shows the relationship between the cantilever support rod and the seat support member in the direction-changing seat according to the present invention (a), (b),
The schematic explanatory drawing shown by (c).

FIG. 8 (a) shows a leg portion for supporting the cantilever support rod,
Schematic which shows (b), (c).

[Explanation of symbols]

 1 Direction Change Type Seat 2 Seat Cushion 3 Seat Back 4 Installation Floor 11 Leg 12 Cantilever Support Rod 13 Seat Support Member 14 Swing Arm 15 Swing Arm 16 Frame Frame 17 Swing Link 18 Connection Link 19 Seat Back Frame 20 Leg Locking Member 25 Supporting Piece 26 Arc-Shaped Receiving Part 27 Stopper 30 Front Interlocking Shaft 31 Rear Interlocking Shaft 32 First Arm Part 33 Second Arm Part 34 Connecting Arm Part

Claims (2)

[Claims] 1. A cantilever support rod extending toward the other side in the seat width direction while being cantilevered by a leg portion standing on one side in the seat width direction on the installation surface, and A pair of seat support members which are provided at both ends of the support rod along the seat front-rear direction and support a seat cushion and a seat back, and a pair of swing arms that are respectively supported by these seat support members to swing in the seat front-rear direction A seat back that is operated, a frame frame that is arranged so as to be stretched between the two seat support members to form a seat cushion, and a swing link that supports the frame frame so that it can swing on the seat support member. And a connecting link for operating the swinging link in conjunction with the swinging arm on the seat back side, and supporting pieces are provided at the front and rear portions on both sides of the frame body, and The arcuate receiving part that supports the supporting pieces in a slidable state during the swing motion of the frame body,
A direction-changing type seat formed on the upper edge of each seat support member. 2. The direction-changing seat according to claim 1, wherein the seat back is provided at a position close to an arcuate receiving portion that supports a supporting piece on the frame body frame side at an upper edge portion of the seat supporting member. 1. A direction-changing seat, comprising a stopper that locks a swinging arm that is swingably supported at a swinging end position.