JP7352435B2 - Railway vehicle seats - Google Patents

Description

The present invention relates to a seat for a railway vehicle.

Patent Document 1 discloses a seat for a railway vehicle. This seat is equipped with a reclining mechanism, and the inclination angle of the seat back can be adjusted by tilting the seat back using its lower part as a pivot point.

JP2012-206638A

However, when the seatback is reclined, the upper part of the seatback tilts to move rearward, so the seatback approaches the rear seat, reducing the space for the user in the rear seat.

SUMMARY OF THE INVENTION An object of the present invention is to provide a reclinable seat for a railway vehicle with a configuration that can prevent a reduction in space for rear seat users.

In order to solve the above problems, a seat for a railway vehicle according to one aspect of the present invention is a seat installed on a footrest provided in a cabin of a railway vehicle, and a shell seat fixed to the footrest. a shell having a shell back portion integrally formed with the shell seat portion and extending upwardly from the rear side of the shell seat portion in succession with the shell seat portion; one seat frame, at least one back-and-forth slide mechanism that connects the seat frame to the shell seat portion so as to be able to move back and forth, and at least one seat that is attached to the seat frame so as to cover the seat frame from above. a cushion; at least one seat back that covers the shell back from the front side and has a lower portion attached to the seat frame; and at least one vertical slide mechanism for causing displacement, and the upper part of the seat back is vertically displaced in conjunction with the longitudinal displacement of the seat frame.

According to the above configuration, the upper part of the seat back is vertically displaced in conjunction with the longitudinal displacement of the seat frame. That is, when the seat frame is slid forward, the seat cushion and the lower part of the seat back move forward and the upper part of the seat back moves downward, so that the seat back is tilted and reclined. When the seatback is reclined, the shell back on the rear side of the seatback is formed integrally with the shell seat and does not recline, so it is possible to prevent the space for the user in the rear seat from being reduced.

Advantageous Effects of Invention According to the present invention, it is possible to provide a configuration in which a reclinable seat of a railway vehicle can prevent a reduction in space for a rear seat user.

FIG. 1 is a perspective view of a railway vehicle seat according to an embodiment. FIG. 2 is an exploded perspective view of the railway vehicle seat shown in FIG. 1. FIG. FIG. 2 is a view of the railway vehicle seat shown in FIG. 1 with a part of the seat back and the seat cushion removed. FIG. 3 is an enlarged side view showing an enlarged connection portion of the seat back. FIG. 2 is a rear perspective view of the front-rear slide mechanism shown in FIG. 1. FIG. FIG. 4 is a side view showing the sliding operation of the front-rear slide mechanism, in which (A) is a state in which the seat frame is located at the rear end position in the movement range, and (B) is a state in which the seat frame is located in the front end position in the movement range. be. FIG. 3 is an enlarged side view showing an enlarged contact point between the second rail and the second guide. 2 is a diagram showing a reclining operation of the railway vehicle seat shown in FIG. 1. FIG.

Hereinafter, embodiments will be described with reference to the drawings.

FIG. 1 is a perspective view of a railway vehicle seat 1 according to the present embodiment. The railway vehicle seat 1 is a reclinable seat installed on a footrest 2 provided in a passenger compartment of the railway vehicle. Note that the concept of direction in the following description is based on the direction viewed by a passenger (user) seated on the railway vehicle seat 1.

In this embodiment, the railway vehicle seat 1 can accommodate two passengers. The railway vehicle seat 1 has a shell 10 fixed to a footrest 2, two seat cushions 3 arranged in the left-right direction, two seat backs 20 arranged in the left-right direction, and two headrests 4 arranged in the left-right direction. The seat cushion 3, the seat back 20, and the headrest 4 are supported by the shell 10, and support the buttocks, back, and head of a passenger seated on the railway vehicle seat 1, respectively.

FIG. 2 is an exploded perspective view of the railway vehicle seat 1. Note that in FIG. 2, the seat cushion 3, seat back 20, and headrest 4 are omitted. As shown in FIG. 2, the shell 10 has a shell seat 11, a shell back 12, and three armrests 13a, 13b, and 14. The shell seat portion 11 has a substantially plate-like shape that spreads horizontally, and is fixed to the leg base 2.

The shell back part 12 is continuous and integrally formed with the shell seat part 11. Further, the shell back portion 12 is continuous with the shell seat portion 11 and extends upward from the rear side of the shell seat portion 11. More specifically, the shell back portion 12 has a substantially plate shape extending upward from the rear end edge of the shell seat portion 11 . Two headrests 4 (see FIG. 1) are attached to the upper part of the shell back part 12 so as to cover the upper part of the shell back part 12 from the front. Moreover, two railway vehicle tables 5 are attached to the back side of the shell back part 12 so as to be lined up in the left-right direction.

Armrest portions 13a and 13b are located at both ends of the railway vehicle seat 1 in the left-right direction so as to sandwich the shell seat portion 11 and the shell back portion 12 from both sides in the left-right direction. The armrests 13a and 13b are integrally formed with the shell seat 11 and the shell back 12. The armrests 13a and 13b are connected to the lower part of the shell back part 12 and the rear part of the shell seat part 11. The shell 10 is formed using a fiber-reinforced resin member and a reinforcing member coupled to the fiber-reinforced resin member.

Further, an armrest portion 14 is connected to the center of the front surface of the shell back portion 12 in the left-right direction. Specifically, a connecting portion 15 is provided at the center in the left-right direction on the front surface of the shell back portion 12 so as to protrude forward (see also FIGS. 3 and 4). A base end portion of the armrest portion 14 is connected to the connecting portion 15 so as to be rotatable about an axis extending in the left-right direction so as to pass through the connecting portion 15. The armrest portion 14 has a deployed position where it extends forward from the shell back 12 so as to pass between the two seat backs 20 and a rear side between the two seat backs 20 where it rotates upward from the deployed position. It can be freely rotated between the storage position and the storage position.

The shell seat portion 11 supports two seat frames 30 arranged in the left-right direction. Each seat frame 30 is formed into a substantially rectangular shape in plan view, and includes a front frame portion 31 extending in the left-right direction, a rear frame portion 32 extending in the left-right direction behind the front frame portion 31, and a front frame portion 31 extending in the left-right direction. It has a left frame part 33 that connects the left end parts of the rear frame part 32, and a right frame part 34 that connects the right end parts of the front frame part 31 and the rear frame part 32. Note that the rear frame portion 32 is provided with an engaged portion 35, which will be described later. A seat cushion 3 (see FIG. 1) is attached to each of the two seat frames 30 so as to cover the seat frame 30 from above.

Further, two attachment mechanisms 40 arranged in the left-right direction are provided above the armrests 13a and 13b on the front surface of the shell back 12. Two attachment mechanisms 40 connect the two seat backs 20 to the shell back 12, respectively.

FIG. 3 is a diagram of the railway vehicle seat 1 with a part of the seat back 20 and the seat cushion 3 removed. Further, FIG. 4 is an enlarged side view showing the connection points of the seat back 20 in an enlarged manner. The front and back surfaces of the seat back 20 have a forwardly convex arch shape when viewed from the side (see also FIG. 1). The seat back 20 includes a frame body 21 made of an aluminum pipe having a shape that follows the contour of the seat back, and a skin 22 that is attached to the frame body 21 so as to cover the frame body 21 and forms a backrest surface (see FIG. 1). ). In addition, in FIGS. 3 and 4, the outer skin 22 of the seat back 20, the armrest portion 14, etc. are omitted.

The upper part of the frame 21 is attached to the shell back 12 by an attachment mechanism 40, and the lower part of the frame 21 is attached to the rear of the seat frame 30. Specifically, the seat back 20 has a first engaging part 23 and a second engaging part 24, and the first engaging part 23 and the second engaging part 24 are connected to the mounting mechanism 40, respectively. and the engaged portion 35 of the seat frame 30.

The first engaging part 23 is located at the upper part of the frame body 21, and detachably engages with the engaged part 41 of the attachment mechanism 40. Further, the second engaging portion 24 is located at the lower part of the frame body 21. Further, the rear frame portion 32 of the seat frame 30 is provided with two engaged portions 35 spaced apart from each other in the left-right direction. The second engaging portion 24 detachably engages with the engaged portion 35 of the seat frame 30. In this embodiment, the second engaging portion 24 is a part of the frame 21, and is press-fitted into and engaged with a recessed portion of each engaged portion 35 that opens in the vertical direction.

The above-described attachment mechanism 40 vertically displaces the upper part of the seat back 20, which is installed with a gap between the front surface of the shell back portion 12 and the upper portion thereof, along the front surface of the shell back portion 12. That is, the attachment mechanism 40 connects the upper part of the seat back 20 to the front surface of the shell back part 12 so as to be vertically displaceable. Specifically, the attachment mechanism 40 includes a rail 42 secured to the shell back 12. The rail 42 supports the engaged portion 41 slidably in the vertical direction. The attachment mechanism 40 functions as a "vertical slide mechanism" of the present invention. Furthermore, the railway vehicle seat 1 of this embodiment includes two longitudinal slide mechanisms 50 that connect the seat frame 30 to the shell seat portion 11 so as to be movable longitudinally.

FIG. 5 is a rear perspective view of the longitudinal slide mechanism 50. 6(A) and 6(B) are side views showing the sliding operation of the longitudinal sliding mechanism 50, and FIG. 6(A) shows a state in which the seat frame 30 is located at the rear end position P1 in the movement range, FIG. 6(B) shows a state in which the seat frame 30 is located at the front end position P2 in the movement range. The two longitudinal slide mechanisms 50 are provided directly below the left frame section 33 and right below the right frame section 34 of the seat frame 30, respectively. The longitudinal slide mechanism 50 displaces the seat frame 30 longitudinally between a predetermined rear end position P1 and a predetermined front end position P2. Each longitudinal slide mechanism 50 includes a first slide portion 51 and a second slide portion 52 disposed in front of the first slide portion 51 .

The first slide portion 51 slides the rear portion of the seat frame 30 with respect to the shell seat portion 11 in the front-rear direction. The first slide portion 51 includes a first rail 61 and a first guide 62. The first rail 61 extends in the front-rear direction so as to be inclined downward toward the front, and is fixed to the upper surface of the shell seat 11. The first guide 62 is supported by the first rail 61 so as to be slidable in the front-rear direction.

In this embodiment, the first slide part 51 connects the rear part of the seat frame 30 and the shell seat part 11 so that the seat frame 30 can rotate about an axis extending in the left-right direction relative to the shell seat part 11. There is. In this embodiment, the first guide 62 includes a rotation mechanism. Specifically, the first guide 62 connects a fixed bracket 63 fixed to the rear part of the seat frame 30, a sliding bracket 64 that slides on the first rail 61, and a fixed bracket 63 and the sliding bracket 64. It has a connecting pin 65. The fixing brackets 63 of the two longitudinal slide mechanisms 50 are fixed to the rear end of the left frame section 33 and the rear end of the right frame section 34, respectively. Furthermore, the fixed bracket 63 protrudes downward from the seat frame 30. Further, the sliding bracket 64 is slidably supported by the first rail 61 and protrudes upward from the first rail 61. The first rail 61 holds the sliding bracket 64 in a manner that it cannot be separated from the sliding bracket 64 within the sliding range of the sliding bracket 64. The connecting pin 65 extends in the left-right direction and rotatably connects the fixed bracket 63 to the sliding bracket 64.

The second slide portion 52 slides the front portion of the seat frame 30 with respect to the shell seat portion 11 in the front-rear direction. The second slide portion 52 includes a second rail 71 and a second guide 72. The second rail 71 is fixed to the lower part of the seat frame 30. More specifically, the second rail 71 of one of the two longitudinal slide mechanisms 50 is fixed to the lower part of the left frame section 33 so as to extend from the front end to the center of the left frame section 33. The second rail 71 of the other of the two longitudinal slide mechanisms 50 is fixed to the lower part of the right frame section 34 so as to extend from the front end to the center of the right frame section 34. There is.

The second guide 72 is fixed to the upper surface of the shell seat 11 and slidably supports the second rail 71. The second guide 72 can be separated from the second rail 71. Specifically, the second guide 72 has a groove that opens in the vertical direction when viewed from the front, and the second rail 71 slides on the bottom surface of the groove. As described above, since the second guide 72 can be separated from the second rail 71, the seat frame 30 can rotate upward about the connecting pin 65 of the first slide portion 51.

In the present embodiment, the longitudinal slide mechanism 50 is configured such that the posture of the seat frame 30 at the front end position P2 shown in FIG. 6(B) is changed from the posture of the seat frame 30 at the rear end position P1 shown in FIG. 6(A). It is configured to be inclined further rearward and downward. Specifically, the first rail 61 shown in FIGS. 6(A) and 6(B) is inclined forward and downward. Therefore, as the seat frame 30 moves from the rear end position P1 to the front end position P2, the height of the contact position between the second rail 71 and the second guide 72 is maintained, and the height of the contact position between the first rail 61 and the first guide 72 is maintained. The height of the contact position with the guide 62 moves downward. Therefore, the posture of the seat frame 30 when the seat frame 30 is at the front end position P2 is inclined to the rear side compared to the posture of the seat frame 30 when it is at the rear end position P1.

FIG. 7 is an enlarged side view showing a contact point between the second rail 71 and the second guide 72. As shown in FIG. 7, the sliding surface of the second guide 72 relative to the second rail 71 is gently curved upward in a side view. Further, in FIG. 7, the second rail 71 when the seat frame 30 is at the rear end position P1 is shown by a solid line, and the second rail 71' when the seat frame 30 is at the front end position P2 is shown by a chain double-dashed line. ing. As the seat frame 30 moves from the rear end position P1 to the front end position P2, the second rail 71 fixed to the seat frame 30 tilts rearward, and as a result, the second guide 72 comes into contact with the second rail 71. The location changes. Since the sliding surface of the second guide 72 has a curved shape when viewed from the side, no matter where the seat frame 30 is in the range in which it slides in the front-rear direction with respect to the shell seat part 11, the Stress at the contact point between the second guide 72 and the second rail 71 can be dispersed.

In this embodiment, an adjustment mechanism (not shown) for adjusting the position of the seat frame 30 in the front-rear direction is provided on the shell seat portion 11 and below the seat cushion 3. The adjustment mechanism allows the user to adjust the seat cushion 3 and the seat frame 30 in the front-rear direction by the user operating a predetermined operating section (for example, a lever, button, etc.) provided on the seat (for example, the armrests 13a, 13b, etc.). It is something that can be adjusted (fixed) to the desired position. That is, when the operating section is operated by the user, the seat frame 30 can be freely displaced back and forth with respect to the shell seat part 11 by the back and forth slide mechanism 50. The adjustment mechanism can be similar to a conventional seat reclining mechanism. For example, the adjustment mechanism may be one that adjusts the position of the seat cushion 3 in the front-rear direction in several stages, or may be one that adjusts the position of the seat cushion 3 in a stepless manner. Further, the adjustment mechanism may be any mechanism such as a mechanical type, a hydraulic type, a pneumatic type, or an electric type.

As explained above, the seat frame 30 can be freely moved back and forth with respect to the shell seat part 11 by the front-back sliding mechanism 50, and the upper part of the seat back 20 can be vertically displaced with respect to the shell back part 12 by the mounting mechanism 40. Connect freely. Therefore, in conjunction with the longitudinal displacement of the seat frame 30, the upper part of the seat back 20 is vertically displaced. In this manner, the railway vehicle seat 1 according to the present embodiment realizes a reclining operation in which the seat back 20 tilts by interlocking the longitudinal slide mechanism 50 and the attachment mechanism 40.

8(A) and 8(B) are side views showing the reclining operation of the railway vehicle seat 1. FIG. 8(A) shows the state of the railway vehicle seat 1 when the seat frame 30 is at the rear end position P1, and FIG. 8(B) shows the state of the railway vehicle seat 1 when the seat frame 30 is at the front end position P2. The state of seat 1 is shown. When the seat frame 30 is slid forward, the headrest 4 remains in the same position, the seat cushion 3 and the lower part of the seat back 20 move forward, and the upper part of the seat back 20 moves downward along the front surface of the shell back 12. Move to. In this way, the upper part of the seat back 20 moves downward in conjunction with the forward displacement of the seat frame 30, so the seat back 20 is tilted and reclined. Furthermore, in this embodiment, when the seatback 20 is reclined, the shell back 12 on the rear side of the seatback 20 is formed integrally with the shell seat 11 and does not recline, so that the space for the rear seat user is saved. Decrease can be prevented.

Furthermore, in the present embodiment, the longitudinal slide mechanism 50 is configured such that the posture of the seat frame 30 at the front end position P2 is inclined more rearward and downward than the posture of the seat frame 30 at the rear end position P1. ing. Therefore, since the seat cushion 3 is tilted backward when the seat back 20 is reclined, the user's buttocks are prevented from shifting forward when the seat back 20 is reclined, and the sitting comfort can be improved.

Furthermore, in this embodiment, since the first rail 61 is inclined forward and downward, a structure in which the seat cushion 3 tilts backward during reclining can be realized with a simple configuration.

Furthermore, in the present embodiment, the sliding surface of the second guide 72 with respect to the second rail 71 is curved upward in a side view, so that the sliding surface of the second guide 72 is curved upwardly from the second rail 71. By dispersing the applied stress, damage to the second guide 72 can be suppressed.

Further, in this embodiment, a plurality of seat cushions 3 are supported by one shell seat portion 11, and a plurality of seat backs 20 are supported by one shell back portion 12. Therefore, one shell 10 is provided for a plurality of seating areas lined up left and right, so the number of parts and the number of assembly steps can be reduced.

Furthermore, in this embodiment, the armrests 13a and 13b are integrally formed with the shell seat 11 and the shell back 12, so the number of parts and the number of assembly steps can be reduced.

Further, in this embodiment, the armrests 13a and 13b are connected to the lower part of the shell back part 12 and the rear part of the shell seat part 11. Therefore, the armrests 13a and 13b also serve to reinforce the shell seat 11 and the shell back 12, so the need for reinforcing the shell 10 can be suppressed.

Moreover, in this embodiment, the shell 10 is formed using a fiber-reinforced resin member and a reinforcing member coupled to the fiber-reinforced resin member. Therefore, since the shell 10 is mainly formed of fiber-reinforced resin, weight reduction can be achieved.

Note that the present invention is not limited to the embodiments described above, and the configuration can be changed, added, or deleted.

For example, instead of the first rail 61 tilting forward and downward, the second rail 71 fixed to the seat frame 30 may tilt backward and downward. In this case as well, it is possible to realize a structure in which the seat cushion 3 tilts backward during reclining. Further, the longitudinal slide mechanism 50 does not have to be configured such that the posture of the seat frame 30 at the front end position P2 is inclined more rearward and downward than the posture of the seat frame 30 at the rear end position P1. For example, both the first rail 61 and the second rail 71 may extend horizontally.

Further, the configuration of the longitudinal sliding mechanism in the present invention is not limited to that described in the above embodiment. The positions, configurations, and shapes of the first rail 61, first guide 62, second rail 71, and second guide 72 are also not limited to those described in the above embodiment. For example, the first guide 62 may not have one or both of the fixed bracket 63 and the sliding bracket 64, and the sliding surface of the second guide 72 may not be curved when viewed from the side. Further, although the longitudinal slide mechanism 50 has a configuration including the first slide portion 51 and the second slide portion 52, it may be configured with one slide portion. That is, the sliding portion of the front-back sliding mechanism 50 is fixed to one rail fixed to one of the shell seat portion 11 and the seat frame 30, and is fixed to the other of the shell seat portion 11 and the seat frame 30, and can freely slide on the rail. The structure may include one guide supported by the guide. In this case, the guide does not need to include a rotation mechanism.

Further, in the above embodiment, two seat cushions 3 and two seat backs 20 are supported by one shell seat part 11, but the seat cushions 3 and two seat backs 20 supported by one shell seat part 11 are Each number may be one or three or more. Further, the armrests 13a, 13b may not be formed integrally with the shell seat 11 and the shell back 12, and the armrests 13a, 13b may be formed as separate members from the shell seat 11 or the shell back 12. good. Further, the armrests 13a, 13b may be connected to only one of the shell seat 11 and the shell back 12. Moreover, although the shell 10 was formed using a fiber-reinforced resin member and a reinforcing member coupled to the fiber-reinforced resin member, the shell 10 may be formed using another member.

1 : Railway vehicle seat 2 : Leg stand 3 : Seat cushion 10 : Shell 11 : Shell seat part 12 : Shell back part 13a : Armrest part 13b : Armrest part 20 : Seat back 21 : Frame body 22 : Outer skin 23 : First section Joining part 24 : Second engaging part 30 : Seat frame 35 : Engaged part 40 : Mounting mechanism (vertical slide mechanism)
41 : Engaged part 42 : Rail 50 : Front-back sliding mechanism 51 : First sliding part 52 : Second sliding part 61 : First rail 62 : First guide 63 : Fixed bracket 64 : Sliding bracket 65 : Connecting pin 71 :Second rail 72 :Second guide

Claims (7)

A seat installed on a footrest provided in a passenger compartment of a railway vehicle,
A shell having a shell seat fixed to the leg base, and a shell back that is integrally formed with the shell seat and extends upward from the rear side of the shell seat in continuity with the shell seat;
at least one seat frame supported by the shell seat;
at least one back-and-forth sliding mechanism that connects the seat frame to the shell seat so that it can be moved back and forth;
at least one seat cushion attached to the seat frame so as to cover the seat frame from above;
at least one seat back that covers the shell back from the front and whose lower part is attached to the seat frame;
at least one vertical slide mechanism provided on the front surface of the shell back portion for vertically displacing the upper part of the seat back along the front surface of the shell back portion;
The upper part of the seat back is vertically displaced in conjunction with the longitudinal displacement of the seat frame,
The longitudinal slide mechanism displaces the seat frame longitudinally between a predetermined front end position and a predetermined rear end position,
The longitudinal slide mechanism is configured such that the posture of the seat frame at the front end position is inclined more rearward and downward than the posture of the seat frame at the rear end position,
The longitudinal sliding mechanism has a first sliding part and a second sliding part disposed on the front side of the first sliding part,
The first slide part includes a first rail fixed to the shell seat part, and a first guide fixed to the seat frame and slidably supported by the first rail,
The second slide part includes a second rail fixed to the seat frame, and a second guide fixed to the shell seat part and slidably supports the second rail,
The first rail is a seat for a railway vehicle that is inclined forward and downward . The railway vehicle seat according to claim 1, wherein an upper part of the seat back moves downward and reclines in conjunction with the forward displacement of the seat frame. 3. The railway vehicle seat according to claim 1 , wherein a sliding surface of the second guide relative to the second rail is curved upwardly in a side view. The at least one seat frame includes a plurality of seat frames arranged side by side on the shell seat portion,
The at least one longitudinal slide mechanism includes a plurality of slide mechanisms that respectively connect the plurality of seat frames to the shell seat portion,
The at least one seat cushion includes a plurality of seat cushions each attached to the plurality of seat frames,
The at least one seat back includes a plurality of seat backs each attached to the plurality of seat frames,
The at least one vertical slide mechanism includes a plurality of vertical slide mechanisms that are provided on the front surface of the shell back and vertically displace the upper portions of the plurality of seat backs, respectively, along the front surface of the shell back,
The railway vehicle according to any one of claims 1 to 3 , wherein the plurality of seat cushions are supported by one of the shell seat parts, and the plurality of seat backs are supported by one of the shell back parts. seat. The railway vehicle seat according to any one of claims 1 to 4 , wherein the shell further includes an armrest portion integrally formed with the shell seat portion and the shell back portion. The railway vehicle seat according to claim 5 , wherein the armrest portion is connected to a lower portion of the shell back portion and a rear portion of the shell seat portion. The railway vehicle seat according to any one of claims 1 to 6 , wherein the shell is formed using a fiber-reinforced resin member and a reinforcing member coupled to the fiber-reinforced resin member.

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