Railway vehicle seat

Abstract

To provide a seat for railway vehicle which allows an arm rest to be comfortably used according to a reclining angle.SOLUTION: A seat for a railway vehicle comprises: a seat structure which supports the hip of a user from below; a seat back structure which supports the back of the user from behind and can be reclined from a first position to a second position around a rotational axis; and an arm rest structure which is arranged on a side of the seat back structure and above the seat structure and supports a front arm of the user from below. The arm rest structure comprises: an arm rest; a pivot which couples a rear portion of the arm rest to the seat back structure so as to be rotatable around an axial line extending in the lateral direction; and a support which supports the arm rest in a forward / backward slidable manner in front of the pivot.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a seat for a railway vehicle.

Background Art

[0002] Patent Document 1 discloses a seat for a railway vehicle in which the backrest can be reclined. Reclining is achieved by tilting the backrest around a rotating shaft disposed near the lower end of the backrest. An armrest for placing the user's forearm is disposed on the side and in front of the backrest.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The armrest is fixedly arranged regardless of reclining. When the armrest is designed based on the non-reclining position of the backrest, as the reclining angle increases, it becomes difficult for the user to use the armrest comfortably.

[0005] Therefore, an object of one aspect of the present disclosure is to provide a seat for a railway vehicle that can be used comfortably according to the reclining angle.

Means for Solving the Problems

[0006] The seat for a railway vehicle according to one aspect of the present disclosure includes a seat structure that supports the user's buttocks from below, a backrest structure that supports the user's back from behind and is reclinable from a first position to a second position around a rotation axis, and an armrest structure that is disposed laterally of the backrest structure and above the seat structure and supports the user's forearms from below. The armrest structure includes an armrest, a pivot that rotatably connects a rear portion of the armrest to the backrest structure around an axis extending in the left-right direction, and a support that supports the armrest so as to be slidable back and forth in front of the pivot.

Advantages of the Invention

[0007] According to one aspect of the present disclosure, during reclining, the rear portion of the armrest moves following the backrest structure while the armrest is supported by the support. Therefore, the user can comfortably use the armrest according to the reclining angle.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2A

Figure 2B

Figure 3

Figure 4

Embodiments for Carrying Out the Invention

[0009] Hereinafter, embodiments will be described with reference to the drawings.

[0010] FIG. 1 is a perspective view showing a seat 1 for a railway vehicle according to an embodiment. As shown in FIG. 1, the seat 1 is a reclining type and is arranged in the passenger compartment of a railway vehicle. The seat 1 is a cross seat installed so that its front-rear direction faces the longitudinal direction of the railway vehicle. That is, the front-rear direction of the seat 1 means the longitudinal direction of the vehicle. The left-right direction of the seat 1 means the vehicle width direction. The seat 1 includes a base 2, a seat structure 3, a backrest structure 4, and an armrest structure 5.

[0011] The base 2 is directly or indirectly fixed to the floor surface of the passenger compartment of the railway vehicle. The base 2 includes a pair of left and right side walls 11. The seat structure 3 is supported by the base 2. The seat structure 3 includes a seat 21 that supports the user's buttocks from below. The seat 21 includes a cushion. The backrest structure 4 extends upward from the rear end of the seat structure 3. The backrest structure 4 includes a backrest 31 that supports the user's back from behind. The backrest structure 4 is reclinable. The armrest structure 5 is arranged laterally of the backrest structure 4 and above the seat structure 3. The armrest structure 5 includes an armrest 41 that supports the user's forearm from below. The armrest 41 is arranged above the side wall 11. Note that although the armrest structure 5 is arranged in front of the backrest structure 4, the armrest structure 5 may be partially located in front of the backrest structure 4 even if the armrest structure 5 is not entirely located in front of the backrest structure 4.

[0012] The armrest 41 has an armrest main body portion 41a and a protruding portion 41b. The armrest main body portion 41a extends in the front-rear direction to support the user's forearm. The armrest main body portion 41a is a cushion portion. The protruding portion 41b protrudes downward from the lower surface of the armrest main body portion 41a. The protruding portion 41b has a pair of left and right side plates extending in the front-rear direction. The protruding portion 41b has, for example, a box shape.

[0013] The longitudinal length of the protruding portion 41b in the front-rear direction is shorter than the longitudinal length of the elbow rest main body portion 41a in the front-rear direction. The longitudinal length of the protruding portion 41b is longer than half of the longitudinal length of the elbow rest main body portion 41a in the front-rear direction. The side wall 11 defines a receiving space S that opens upward. The protruding portion 41b of the elbow rest 41 is inserted into the receiving space S from above. The protruding portion 41b of the elbow rest 41 is slidable up and down while being accommodated in the receiving space S.

[0014] FIG. 2A is a perspective view showing the skeleton of the seat 1 in FIG. 1. FIG. 2B is a side view of the skeleton in FIG. 2A. As shown in FIGS. 2A and B, the base 2 (see FIG. 1) includes a pair of plate frames 12 and a pair of pipe frames 13. The pair of plate frames 12 are respectively fixed to the inner surfaces of the pair of side walls 11. The pair of pipe frames 13 extend in the left-right direction below the seat structure 3 and connect the pair of plate frames 12 to each other.

[0015] The seat structure 3 includes a seat 21 (see FIG. 1), a seat frame 22, a front slide structure 23, and a rear slide structure 24. The seat frame 22 is disposed below the seat 21 to support the seat 21, and is supported by the plate frame 12 of the base 2 via the front slide structure 23 and the rear slide structure 24. That is, the seat 21 supported by the seat frame 22 is slidable in the front-rear direction with respect to the base 2 by the front slide structure 23 and the rear slide structure 24.

[0016] The front slide structure 23 has a pin 51 and a slider 52. The pin 51 is fixed to the plate frame 12 so as to protrude inward in the left-right direction from the plate frame 12. The slider 52 is fixed to the seat frame 22. The slider 52 has a guide hole 52a extending in the front-rear direction. The pin 51 is inserted into the guide hole 52a so as to be slidable back and forth. That is, the slider 52 is guided by the pin 51 so as to be slidable back and forth.

[0017] The rear slide structure 24 has a rail 55 and a slider 56. The rail 55 is fixed to the seat frame 22 and extends in the front-rear direction. The slider 56 is fixed to the plate frame 12 and is guided by the rail 55 so as to be slidable back and forth. In the rear slide structure 24, the rail 55 extends obliquely forward and downward. That is, the rear slide structure 24 is configured to lower the lower end of the reclining structure 4 as the reclining structure 4 reclines from the non-reclining position to the maximum reclining position.

[0018] The reclining structure 4 includes a reclining frame 32 and a rotating shaft 33. The reclining frame 32 extends upward from the rear part of the seat frame 22. The rotating shaft 33 rotatably connects the lower part of the reclining frame 32 to the rear part of the seat frame 22. The axis of the rotating shaft 33 extends in the left-right direction. The reclining frame 32 is tiltable around the rotating shaft 33. The recliner 31 fixed to the reclining frame 32 is tiltable around the rotating shaft 33 to be reclinable.

[0019] The armrest structure 5 includes a pivot 42 and a support 43. The pivot 42 rotatably connects the rear end portion of the armrest 41 to the reclining frame 32 around an axis extending in the left-right direction. The pivot 42 is disposed above the rotating shaft 33. Specifically, the pivot 42 is disposed below the main body portion 41a of the armrest and connects the rear end portion of the protruding portion 41b of the armrest 41 to the reclining frame 32. A guide 41c is formed at the front portion of the protruding portion 41b of the armrest 41. The guide 41c is, for example, a long hole extending in the front-rear direction and opening in the left-right direction.

[0020] The support 43 is disposed in the accommodation space S (see FIG. 1) of the side wall 11. The support 43 is fixed to the side wall 11. The support 43 is disposed in front of the pivot 42. The support 43 supports the armrest 41 so as to be slidable back and forth. The support 43 is, for example, a pin inserted into the guide 41c of the armrest 41 in the left-right direction. That is, the guide 41c is engaged with the support 43 so as to be slidable back and forth.

[0021] Figure 3 is a side view of the chair 1 of FIG. 1 when not reclined. Figure 4 is a side view of the chair of FIG. 1 when reclined. As shown in FIGS. 3 and 4, when the user 100 releases the lock of the backrest structure 4 and pushes the backrest structure 4 backward with the back, the backrest structure 4 reclines from the non-reclining position X (first position) toward the maximum reclining position Y (second position). The non-reclining position X may also be referred to as the upright position. When the backrest structure 4 reclines, the seat structure 3 moves forward by the front slide structure 23 and the rear slide structure 24, and the lower end of the backrest structure 4 moves forward and downward.

[0022] In the entire range in which the backrest structure 4 operates from the non-reclining position X to the maximum reclining position Y, the state in which the protruding portion 41b of the armrest 41 is inserted into the accommodation space S is maintained. In other words, the amount of downward protrusion of the protruding portion 41b from the armrest main body portion 41a is set to an amount such that the protruding portion 41b is maintained in a state of being inserted into the accommodation space S throughout the reclining range. The pivot 42 is located above the accommodation space S at the non-reclining position X, but is located within the accommodation space S at the maximum reclining position Y.

[0023] When the backrest structure 4 moves from the non-reclining position X to the maximum reclining position Y, the amount of vertical displacement of the rear end of the armrest main body portion 41a is larger than the amount of vertical displacement of the front end of the armrest main body portion 41a. When the backrest structure 4 moves from the non-reclining position X to the maximum reclining position Y, the rear end of the armrest main body portion 41a moves forward and downward. When the backrest structure 4 moves from the non-reclining position X to the maximum reclining position Y, the front end of the armrest main body portion 41a moves forward and upward. The amount of vertical displacement L of the pivot 42 when the backrest structure 4 moves from the non-reclining position X to the maximum reclining position Y is set to a value of 50 mm or more and 90 mm or less, preferably 60 mm or more and 80 mm or less.

[0024] According to the configuration described above, during reclining, the armrest 41 moves following the reclining structure 4 while being supported by the support 43. Therefore, the user 100 can comfortably use the armrest 41 according to the reclining angle.

[0025] Since the guide 41c of the armrest 41 is engaged with the support 43 so as to be slidable back and forth, the armrest 41 can be connected to the support 43 while smoothly moving the armrest 41 during reclining.

[0026] When the reclining structure 4 moves between the non-reclining position X and the maximum reclining position Y, the protruding portion 41b of the armrest 41 is maintained in the inserted state in the accommodation space S of the side wall 11. Therefore, regardless of reclining, the visual integrity of the armrest 41 and the side wall 11 in side view can be maintained, and the appearance can be improved.

[0027] Since the vertical displacement amount of the pivot 42 when the reclining structure 4 moves from the non-reclining position X to the maximum reclining position Y is a value of 50 mm or more and 90 mm or less, the armrest 41 moves sufficiently up and down with reclining, and the user 100 can comfortably use the armrest 41 according to reclining.

[0028] The front slide structure 23 and the rear slide structure 24 lower the lower end of the reclining structure 4 as the reclining structure 4 reclines from the non-reclining position X to the maximum reclining position Y. Therefore, the armrest 41 can be sufficiently lowered during reclining.

[0029] Note that the support 43 may be configured to support from below without being engaged with the armrest 41. The protruding portion 41b of the armrest 41 may be omitted. In that case, a support may be provided on the upper surface of the side wall 11 and the support may support the lower surface of the armrest. The guide 41c may be a pin and the support 43 may be a guide hole.

[0030] As described above, the embodiments have been described as examples of the technology disclosed in the present application. However, the technology in the present disclosure is not limited thereto, and is also applicable to embodiments in which appropriate changes, replacements, additions, omissions, etc. are made. Further, it is also possible to form a new embodiment by combining the respective constituent elements described in the above embodiments. For example, a part of the configuration or method in one embodiment may be applied to another embodiment, and a part of the configuration in an embodiment can be arbitrarily extracted separately from other configurations in that embodiment. Further, among the constituent elements described in the accompanying drawings and the detailed description, there are not only constituent elements essential for solving the problem, but also constituent elements not essential for solving the problem for exemplifying the technology.

Explanation of Signs

[0031] 1 Armchair 3 Seat structure 4 Backrest structure 5 Armrest structure 21 Seat 22 Seat frame 23 Front slide structure 24 Rear slide structure 33 Rotation axis 41 Armrest 41a Armrest main body 41b Protrusion 42 Pivot 43 Support X Non-reclining position Y Maximum reclining position S Storage space

Claims

1. a seat structure that supports the user's buttocks from below; a backrest structure that supports the user's back from behind and is reclinable from a first position to a second position around a rotation axis; an armrest structure that is disposed laterally of the backrest structure and above the seat structure and supports the user's forearms from below; a base including side walls; and the armrest structure includes an armrest, a pivot that rotatably connects a rear portion of the armrest to the backrest structure around an axis extending in the left-right direction, and a support that supports the armrest to be slidable back and forth in front of the pivot; the side walls of the base are disposed below the armrest; the armrest has an armrest main body portion that supports the user's forearms and a protruding portion that protrudes downward from the armrest main body portion; the side walls define an accommodation space that opens upward and into which the protruding portion is inserted slidably up and down from above; the protruding portion has a protruding amount such that insertion into the accommodation space is maintained when the backrest structure moves between the first position and the second position, a seat for a railway vehicle.

2. A seat structure that supports the user's buttocks from below; a backrest structure that supports the user's back from behind and is reclinable from a first position to a second position around a rotation axis; an armrest structure that is disposed laterally of the backrest structure and above the seat structure and supports the user's forearms from below, and the armrest structure includes an armrest, a pivot that rotatably connects a rear portion of the armrest to the backrest structure around an axis extending in the left-right direction, and a support that supports the armrest to be slidable back and forth in front of the pivot; the seat structure includes a seat, a seat frame that supports the seat, and a slide structure that slides the seat frame in the front-rear direction; the backrest structure is connected to the seat frame via the rotation axis; the slide structure lowers a lower end of the backrest structure as the backrest structure reclines from the first position to the second position, a seat for a railway vehicle.

3. The armrest has a guide that is engaged by the support to be slidable back and forth, the seat for a railway vehicle according to claim 1 or 2.

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