JP7698557B2 - Railway car seats - Google Patents

Description

This disclosure relates to seats for railway vehicles.

Patent Document 1 discloses a railway car seat with a reclining backrest. The backrest tilts around a rotation axis located near the bottom end of the backrest, allowing it to recline. An armrest is located to the side and in front of the backrest for the user to place their forearms on.

JP 2000-344097 A

The armrests are fixedly positioned regardless of the reclining angle. If the armrests are designed based on the backrest being in a non-reclining position, the user will find it harder to use them comfortably as the reclining angle increases.

Therefore, one aspect of the present disclosure aims to provide a seat for a railway vehicle that allows the armrest to be used comfortably according to the reclining angle.

A railway vehicle seat according to one embodiment of the present disclosure comprises a seat structure supporting the buttocks of a user from below, a backrest structure supporting the back of the user from behind and capable of reclining from a first position to a second position about a rotation axis, and an armrest structure disposed to the side of the backrest structure and above the seat structure supporting the forearm of the user from below. The armrest structure includes an armrest, a pivot connecting the rear of the armrest to the backrest structure so as to be rotatable about an axis extending in the left-right direction, and a support forward of the pivot supporting the armrest so as to be slidable back and forth.

According to one aspect of the present disclosure, when reclining, the rear of the armrest moves in accordance with the backrest structure while being supported by the support. This allows the user to use the armrest comfortably according to the reclining angle.

FIG. 1 is a perspective view showing a railway vehicle seat according to an embodiment of the present invention. FIG. 2A is a perspective view showing the framework of the seat of FIG. FIG. 2B is a side view of the skeleton of FIG. 2A. FIG. 3 is a side view of the seat of FIG. 1 in an unreclined position. FIG. 4 is a side view of the seat of FIG. 1 in a reclined position.

The following describes the embodiment with reference to the drawings.

Figure 1 is a perspective view showing a railway vehicle seat 1 according to an embodiment. As shown in Figure 1, the seat 1 is a reclining type seat that is arranged in the passenger compartment of a railway vehicle. The seat 1 is a cross seat that is installed so that its front-to-rear direction faces the longitudinal direction of the railway vehicle. In other words, the front-to-rear direction of the seat 1 means the longitudinal direction of the vehicle. The left-to-right direction of the seat 1 means the transverse direction of the vehicle. The seat 1 comprises a base 2, a seat structure 3, a backrest structure 4, and an armrest structure 5.

The base 2 is fixed directly or indirectly 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 reclining. The armrest structure 5 is disposed to the side 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 disposed above the side wall 11. Note that the armrest structure 5 is disposed in front of the backrest structure 4, but the armrest structure 5 may not be located entirely in front of the backrest structure 4, and may be partially located in front of the backrest structure 4.

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

The front-to-rear length of the protrusion 41b is shorter than the front-to-rear length of the armrest main body 41a. The front-to-rear length of the protrusion 41b is longer than half the front-to-rear length of the armrest main body 41a. The side wall 11 defines a storage space S that opens upward. The protrusion 41b of the armrest 41 is inserted into the storage space S from above. The protrusion 41b of the armrest 41 can slide up and down freely while stored in the storage space S.

Figure 2A is a perspective view showing the skeleton of the seat 1 in Figure 1. Figure 2B is a side view of the skeleton in Figure 2A. As shown in Figures 2A and 2B, the base 2 (see Figure 1) includes a pair of plate frames 12 and a pair of pipe frames 13. The pair of plate frames 12 are fixed to the inner surfaces of the pair of side walls 11, respectively. 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.

The seat structure 3 includes a seat 21 (see FIG. 1), a seat frame 22, a front sliding structure 23, and a rear sliding 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 sliding structure 23 and the rear sliding structure 24. In other words, the seat 21 supported by the seat frame 22 can slide in the front-rear direction relative to the base 2 by the front sliding structure 23 and the rear sliding structure 24.

The front sliding 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 able to slide freely back and forth. That is, the slider 52 is guided by the pin 51 so as to be able to slide freely back and forth.

The rear sliding 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 able to slide back and forth. In the rear sliding structure 24, the rail 55 extends obliquely forward and downward. In other words, the rear sliding structure 24 is configured to lower the lower end of the backrest structure 4 as the backrest structure 4 reclines from the non-reclined position toward the maximum reclining position.

The backrest structure 4 includes a backrest frame 32 and a rotating shaft 33. The backrest frame 32 extends upward from the rear of the seat frame 22. The rotating shaft 33 connects the lower part of the backrest frame 32 to the rear of the seat frame 22 so that it can rotate freely. The axis of the rotating shaft 33 extends in the left-right direction. The backrest frame 32 is tiltable around the rotating shaft 33. The backrest 31 fixed to the backrest frame 32 is tiltable around the rotating shaft 33 and can recline.

The armrest structure 5 includes a pivot 42 and a support 43. The pivot 42 connects the rear end of the armrest 41 to the backrest frame 32 so that it can rotate freely around an axis extending in the left-right direction. The pivot 42 is positioned above the rotation axis 33. Specifically, the pivot 42 is positioned below the armrest main body 41a, and connects the rear end of the protruding part 41b of the armrest 41 to the backrest frame 32. A guide 41c is formed in front of the protruding part 41b of the armrest 41. The guide 41c is, for example, a long hole that extends in the front-rear direction and opens in the left-right direction.

The support 43 is disposed in the storage 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 forward of the pivot 42. The support 43 supports the armrest 41 so that it can slide forward and backward. The support 43 is, for example, a pin inserted in the guide 41c of the armrest 41 in the left-right direction. In other words, the guide 41c is engaged by the support 43 so that it can slide forward and backward.

Figure 3 is a side view of the seat 1 of Figure 1 when not reclined. Figure 4 is a side view of the seat 1 of Figure 1 when reclined. As shown in Figures 3 and 4, when the user 100 unlocks the backrest structure 4 and pushes the backrest structure 4 backward with his/her back, the backrest structure 4 reclines from the non-reclined position X (first position) to the maximum reclined position Y (second position). The non-reclined position X may also be referred to as the upright position. When the backrest structure 4 reclines, the front slide structure 23 and the rear slide structure 24 move the seat structure 3 forward, and the lower end of the backrest structure 4 moves forward and downward.

The protrusion 41b of the armrest 41 remains inserted into the storage space S throughout the entire range of movement of the backrest structure 4 from the non-reclining position X to the maximum reclining position Y. In other words, the amount of downward protrusion of the protrusion 41b from the armrest body 41a is set to an amount that maintains the protrusion 41b inserted into the storage space S throughout the entire reclining range. The pivot 42 is located above the storage space S in the non-reclining position X, but is located within the storage space S in the maximum reclining position Y.

When the backrest structure 4 moves from the non-reclining position X to the maximum reclining position Y, the vertical displacement of the rear end of the armrest main body 41a is greater than the vertical displacement of the front end of the armrest main body 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 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 41a moves forward and upward. The 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.

According to the configuration described above, when reclining, the rear of the armrest 41 moves following the backrest structure 4 while the armrest 41 is supported by the support 43. Therefore, the user 100 can use the armrest 41 comfortably according to the reclining angle.

The guide 41c of the armrest 41 is engaged with the support 43 so that it can slide back and forth, allowing the armrest 41 to move smoothly when reclining while still being connected to the support 43.

When the backrest structure 4 moves between the non-reclining position X and the maximum reclining position Y, the protruding portion 41b of the armrest 41 remains inserted into the storage space S of the side wall 11, so that the visual integrity of the armrest 41 and the side wall 11 can be maintained in a side view regardless of the reclining position, resulting in a good appearance.

When the backrest structure 4 moves from the non-reclining position X to the maximum reclining position Y, the vertical displacement of the pivot 42 is a value between 50 mm and 90 mm, so that the armrest 41 moves up and down sufficiently with reclining, allowing the user 100 to use the armrest 41 comfortably according to the reclining position.

The front sliding structure 23 and the rear sliding structure 24 lower the lower end of the backrest structure 4 as the backrest structure 4 reclines from the non-reclined position X toward the maximum reclining position Y, so that the armrest 41 can be lowered sufficiently when reclining.

The support 43 may be configured to support the armrest 41 from below without engaging with it. 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.

As described above, the above embodiment has been described as an example of the technology disclosed in this application. However, the technology in this disclosure is not limited to this, and can be applied to embodiments in which modifications, substitutions, additions, omissions, etc. are made as appropriate. In addition, it is also possible to combine the components described in the above embodiment to create a new embodiment. For example, a portion of the configuration or method in one embodiment may be applied to another embodiment, and a portion of the configuration in an embodiment can be separated from the other configurations in that embodiment and arbitrarily extracted. In addition, the components described in the attached drawings and detailed description include not only components essential for solving the problem, but also components that are not essential for solving the problem in order to illustrate the technology.

REFERENCE SIGNS LIST 1 seat 3 seat structure 4 backrest structure 5 armrest structure 21 seat 22 seat frame 23 front sliding structure 24 rear sliding structure 33 rotation shaft 41 armrest 41a armrest main body 41b protrusion 42 pivot 43 support X non-reclining position Y maximum reclining position S storage space

Claims (3)

A seat structure that supports the user's buttocks from below;
a backrest structure that supports the user's back from behind and is recliningable from a first position to a second position about a rotation axis;
an armrest structure disposed on a side of the backrest structure and above the seat structure, the armrest structure supporting the forearm of the user from below;
a base including a sidewall ;
The armrest structure includes:
Armrests and
a pivot that connects the rear portion of the armrest to the backrest structure so as to be rotatable about an axis extending in the left-right direction;
A support that supports the armrest forward and backward slidably in front of the pivot ,
the side wall of the base is disposed below the armrest;
The armrest has an armrest main body portion that supports the forearm of the user and a protrusion portion that protrudes downward from the armrest main body portion,
the side wall defines an accommodation space that opens upward and into which the protrusion is inserted from above so as to be vertically slidable;
A seat for a railway vehicle , wherein the protrusion has a protrusion amount that allows the insertion into the storage space to be maintained when the backrest structure moves between the first position and the second position. A seat structure that supports the user's buttocks from below;
a backrest structure that supports the user's back from behind and is recliningable from a first position to a second position about a rotation axis;
an armrest structure disposed on a side of the backrest structure and above the seat structure, for supporting the forearm of the user from below;
The armrest structure includes:
Armrests and
a pivot that connects the rear portion of the armrest to the backrest structure so as to be rotatable about an axis extending in the left-right direction;
A support that supports the armrest forward and backward slidably 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 a front-rear direction,
The seat back support structure is connected to the seat frame via the rotation shaft,
The sliding structure lowers a lower end of the backrest structure as the backrest structure reclines from the first position toward the second position. 3. A seat for a railway vehicle according to claim 1 or 2 , wherein the armrest has a guide which is engaged by the support so as to be slidable forward and backward.

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