Seating device

Abstract

To provide a seat apparatus capable of physically limiting the use of a table when being in a long state where a seat back face is along a wall.SOLUTION: A seat apparatus 10 which can exchange a state of a seat 1 comprises a table 70 which can be operated in a storage state where the table is put to the side of the seat 1 and a use state where the table is pulled out and extended in front of a seating person, and limits the operation in which the table 70 is constrained in the storage state and pulled out, when the seat 1 is in a long state.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a seating device capable of changing the state of a seat. [Background technology]

[0002] Conventionally, for example, seats installed in railway vehicles have been known to have a seating type that is long in both directions and can seat multiple people, such as two people. These seating types are usually installed along the walls on both sides of the passenger compartment. Among seating types, there is also known a swivel seat that can be rotated around a rotation axis at the center of the seat to change its orientation (position) between a long position in which the seat back is parallel to the wall and a cross position in which the seat back is perpendicular to the wall.

[0003] In such a rotating seat, when the seat is rotated from a long position along the wall to a cross position, it is necessary to ensure that the seat's trajectory (radius of rotation) does not interfere with the wall.Therefore, a seat device has already been proposed as this type of rotating seat, which is equipped with a sliding mechanism in addition to a seat rotation mechanism, and also with a transmission mechanism that links the sliding mechanism to the rotation mechanism (see, for example, Patent Document 1).

[0004] In other words, in the above-mentioned seating device, in order to widen the aisle width between the seats on both sides in the passenger compartment as much as possible to ensure a comfortable space, when in the long position the seat rotation axis is positioned against the wall, but when in the cross position the seat rotation axis is slid toward the aisle so that the seat does not interfere with the wall. In general, with rotating seats, including this type of seating device, the seats are converted to the long position during peak times such as rush hour.

[0005] Furthermore, some railway vehicle seats are equipped with tables for the convenience of the seat occupant. The tables are usually stored in sleeves under the armrests, and are configured to be pulled out and deployed by opening and closing the armrests (see, for example, Patent Document 2). The installation of such tables in the seat devices has been under consideration. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 3431772 [Patent Document 2] Japanese Patent Application Laid-Open No. 2008-74396 Summary of the Invention [Problem to be solved by the invention]

[0007] However, if a table is installed on the above-mentioned conventional swivel seats, there is no particular problem when the table is unfolded when the seats are in the cross position, but if the table is unfolded when the seats are in the extended position, there is a risk that it will hinder passengers getting on and off during crowded times. Therefore, in order to install a table on a swivel seat, some kind of measure is needed when the seat is in the extended position.

[0008] The present invention was made in response to the problems of the prior art described above, and aims to provide a seating device that can reliably and easily restrict the use of a table when the table is mounted on a rotating seat, only when the seat is in a specific state (long state) where use of the table becomes a problem. [Means for solving the problem]

[0009] In order to achieve the above-mentioned object, one aspect of the present invention is to provide a method for manufacturing a semiconductor device comprising: In a seating device capable of changing the state of a seat, A table that can be operated between a stored state where it is stored at the side of the seat and a used state where it is pulled out and deployed in front of the seat occupant; a table lock mechanism that locks the table in a stowed state when the seat is in a specific state, The table lock mechanism has a locking part that can be engaged with and disengaged from the table when the table is in a stored state, and when the seat is converted into a specific state, the locking part directly engages with the table itself to restrain it in the stored state. [Effects of the Invention]

[0010] According to the seat device of the present invention, even if the seat state can be changed, a table can be installed and used, and the use of the table is restricted only in specific states where the use of the table is problematic, while the table can be used in states other than the specific states, thereby providing convenience to the seated person. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a perspective view showing a part of the internal structure of a seat device according to an embodiment of the present invention. [Figure 2] 1 is a perspective view showing a state in which the armrests are open in a cross state of a seat device according to an embodiment of the present invention. [Figure 3] 1 is a perspective view showing a state in which a table is unfolded in a cross state of a seat device according to an embodiment of the present invention. FIG. [Figure 4] 1 is a perspective view showing the inside of a sleeve body in a long state of a seat device according to an embodiment of the present invention. FIG. [Figure 5] 1 is a perspective view showing an internal structure of a seat back side of a seat device according to an embodiment of the present invention in a long state. [Figure 6] 1 is a side view showing a state in which a table is unusably restrained inside a sleeve body of a seating device according to an embodiment of the present invention. FIG. [Figure 7] 1 is a side view showing a state in which the table is released from restraint and can be used inside the sleeve body of the seat device according to an embodiment of the present invention. FIG. [Figure 8] 1 is a perspective view showing a storage state in which a table of a seat device according to an embodiment of the present invention is stored inside a sleeve member. [Figure 9] 1 is a front view showing a storage state in which a table of a seat device according to an embodiment of the present invention is stored inside a sleeve member. [Figure 10] 1A and 1B are a perspective view and a front view showing a stored position of a table of a seating device according to an embodiment of the present invention; [Figure 11]1 is a perspective view showing a state in which a table of a seat device according to an embodiment of the present invention is being removed from inside a sleeve body. FIG. [Figure 12] 1 is a front view showing a state in which a table of a seat device according to an embodiment of the present invention is being removed from inside a sleeve body. [Figure 13] 1A and 1B are a perspective view and a front view, respectively, showing a posture of the seat device according to the embodiment of the present invention in a state where a table is being removed. [Figure 14] 1 is a perspective view showing an expanded state in which a table of a seat device according to an embodiment of the present invention is removed from inside a sleeve body. [Figure 15] 1 is a front view showing a deployed state in which a table of a seat device according to an embodiment of the present invention is removed from inside a sleeve body. [Figure 16] 1A and 1B are a perspective view and a front view showing the posture of an unfolded state of a table of a seating device according to an embodiment of the present invention; [Figure 17] 1 is a perspective view of a reclining lock mechanism of a seat device according to an embodiment of the present invention in a cross state, as viewed from the back of the seat. FIG. [Figure 18] 1 is a front view of a reclining lock mechanism of a seat device according to an embodiment of the present invention in a cross state, as viewed from the seat back side. [Figure 19] FIG. 19 is a cross-sectional view taken along line AA in FIG. 18. [Figure 20] 1 is a perspective view of a reclining lock mechanism of a seat device according to an embodiment of the present invention in a long state, as viewed from the back of the seat. FIG. [Figure 21] 1 is a front view of a reclining lock mechanism of a seat device according to an embodiment of the present invention in a long state, as viewed from the back of the seat. FIG. [Figure 22] 22 is a cross-sectional view taken along line BB in FIG. 21. [Figure 23] 1 is a perspective view showing a base, a movable base, and a base frame of a seat device according to an embodiment of the present invention. [Figure 24] 1 is a perspective view showing a rotation lock mechanism of a seat device according to an embodiment of the present invention. [Figure 25]1 is a perspective view showing a rotation lock mechanism of a seat device according to an embodiment of the present invention, as viewed from below. [Figure 26] 1 is a front view showing a cross state of a seat device according to an embodiment of the present invention; [Figure 27] 1 is a side view showing a seat device according to an embodiment of the present invention in a long state; [Figure 28] 1A and 1B are a side view and a perspective view showing a rotation operating unit of a seat device according to an embodiment of the present invention in a cross state. [Figure 29] 1A and 1B are a side view and a perspective view showing a rotation operating unit of a seat device according to an embodiment of the present invention in a long state. [Figure 30] 10A to 10C are explanatory diagrams showing a process of converting a seat into a long state, a one-cross state, and a reverse-cross state in a seat device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, a representative embodiment of the present invention will be described with reference to the drawings. 1 to 30 show one embodiment of the present invention. The seat device 10 according to this embodiment is capable of changing the state of the seat 1. Here, the state of the seat 1 is a concept that includes not only the orientation of the seat 1 due to rotation, but also changes in the front-to-back position of the seat 1. The type of seat 1 is not particularly limited, but the following description will be given taking as an example a case where the seat 1 is applied to a two-seater seat installed in the passenger compartment of a railway vehicle. Note that slight differences in shape of the same parts in each figure are merely design changes (for example, differences in the shape of the backrest 3 and foot rest 11 between Figures 1 and 26).

[0013] <Overview of the seating device 10> As shown in Fig. 1, the seat device 10 comprises a base 11 fixed to the floor surface, a movable base 20 supported on the base 11 so as to be movable forward and backward, and a seat frame 30 supported on the movable base 20 so as to be rotatable forward and backward on a substantially horizontal plane. Here, the base 11 corresponds to the "fixed side of the seat 1" of the present invention, and the movable base 20 and the frame 30 correspond to the "movable side of the seat 1" of the present invention. The seat device 10 is placed on the floor surface next to a wall (window) in a passenger compartment of a railway vehicle, and "W" in Figs. 23 and 30 indicates a part of the wall parallel to the direction of travel of the railway vehicle.

[0014] 1 and 23, the frame 30 of the seat 1 is rotatably supported on the movable base 20 via a rotation mechanism 40. The movable base 20 is supported on the base 11 via a slide mechanism 14 (see FIG. 23) so that the entire movable base 20 can move forward and backward together with the rotation mechanism 40. Furthermore, the seat device 10 is provided with an interlocking mechanism (not shown) for interlocking the rotation of the seat 1 by the rotation mechanism 40 with the advancement and retreat of the seat 1 by the slide mechanism 14.

[0015] <Seat 1> As shown in Figure 1, seat 1 is, for example, a two-seater, and is composed of a pair of left and right seat portions 2, 2 and backrests 3, 3 arranged side by side on both sides. The lower end of each backrest 3 is supported at the rear end of seat portion 2 so that it can be tilted via a reclining mechanism 50 (described later). Both sides of seat 1 are surrounded by a pair of sleeves 4, 4. The upper end of each sleeve 4 is configured as an armrest 5 extending approximately horizontally in the front-to-rear direction. In addition, sleeves 4 are provided with a table 70 called an in-arm table on which the seated person can place items.

[0016] <Seat 1 status> As shown in Figure 30, the state of the seat 1 can be changed between a long state (see Figure 30(a)) in which the seat back is approximately parallel to the wall W, and a cross state (see Figures 30(c) and (d)) in which the seat back is approximately perpendicular to the wall W. The cross states include a one-cross state (see Figure 30(c)) in which the seat 1 faces the direction of travel of the vehicle, and a reverse-cross state (see Figure 30(d)) in which the seat 1 faces the opposite direction to the direction of travel of the vehicle. Hereinafter, when referring to the one-cross state and the reverse-cross state collectively, they will be simply referred to as the cross state. Here, the back of the seat is synonymous with the back side of the backrest 3. The seat 1 is generally operated in the long state during peak times such as rush hour.

[0017] 1 to 3 show the seat device 10 when the seat 1 is in the one-cross state. FIGS. 4 and 5 show the seat device 10 when the seat 1 is in the long state. As shown in FIG. 30, if the long state of the seat 1 is taken as the original position and the rotation angle is 0 degrees, rotating the seat 1 by 90 degrees in one direction (counterclockwise in FIG. 30) from the long state results in the one-cross state, and rotating the seat 1 by 90 degrees in the opposite direction (clockwise in FIG. 30) from the long state results in the reverse-cross state. The long state in this embodiment corresponds to the "specific state" of the seat 1 in the present invention.

[0018] As shown in Figures 6 to 8, the table 70 is provided in the sleeve body 4, and is configured to be pulled out and deployed to the outside by opening and closing the armrest 5. That is, the table 70 can be operated between a storage state (see Figure 4) in which it is stored inside the sleeve body 4 and stored to the side of the seat 1, and a usage state (see Figure 3) in which it is pulled out and deployed in front of the seated person. The inside of the sleeve body 4 is a storage space for storing the table 70, and the upper end side of the sleeve body 4 is open. The armrest 5 that covers the opening is provided at the upper end side of the sleeve body 4 and can be opened and closed.

[0019] The armrest 5 is made, for example, of a narrow plate-like material covered with a cushioned cover. As shown in FIG. 11, one side end of the front part of the armrest 5 is rotatably connected to the outer edge of the upper opening of the sleeve body 4 via a hinge 5a, and the other side end rotates left and right. In other words, the armrest 5 opens sideways, rather than vertically, in the front-to-back direction. More specifically, as shown in FIG. 6, the table 70 includes a table tray 71, which forms its main part, and a base hinge 72, a rotating hinge 73, and a tray hinge 74 as a support mechanism for the table tray 71.

[0020] The table tray 71 is generally fan-shaped overall and formed as a single flat plate. The base hinge 72 is fixed inside the sleeve body 4 toward the front of the upper end so as to extend in the vertical direction. As shown in Figures 10 and 13, the rotation hinge 73 is connected to the upper end of the base hinge 72 via a pivot 73a so as to be rotatable in the front-to-rear direction. Here, the pivot 73a is not a horizontal axis perpendicular to the vertical direction in which the base hinge 72 extends vertically, but is slightly inclined downward toward the inside of the seat.

[0021] 9 and 10, when the table 70 (table tray 71) is stored inside the sleeve body 4, its flat surface is not vertical, but is stored in a state inclined with respect to the vertical outer surface 4a of the sleeve body 4. In other words, when the table 70 is in the stored state, the upper end side 71a to the lower end side 71b of the table tray 71 is arranged in a position inclined with respect to the vertical outer surface 4a of the sleeve body 4, with a distance of about the upper end side 71a.

[0022] 2 and 9, the inner surface 4b of the sleeve body 4 hangs down parallel to the outer surface 4a at its upper end, but hangs down in a stepped manner so as to approach the outer surface 4a from the middle. In this cross-sectional shape of the sleeve body 4 when viewed from the front, storing the table tray 71 in the tilted state described above makes it possible to maximize the size (surface area) of the table tray 71 within a limited space. In other words, by tilting the table tray 71, the size of the table tray 71 is expanded until it reaches the lower end inside the sleeve body 4, eliminating the conventional two-fold structure of the table tray 71.

[0023] As shown in Figure 13, one end of the tray hinge 74 is connected to the middle of the rotating hinge 73 via a pivot 74a so as to be rotatable in the left-right direction, and is fixed to a corner on the back side of the table tray 71. The pivot 74a of the tray hinge 74 is a horizontal axis extending in the front-to-rear direction. The tray hinge 74 or the rotating hinge 73 is provided with a well-known stopper structure for stopping and holding the rotation of the table tray 71 at an angle from a slightly upright position tilted toward the inside of the seat (see Figure 12) to a horizontal position for use. This support mechanism supports the table 70 (table tray 71) so that it can be moved between a stored position within the sleeve body 4 and a used position in which it is extended and deployed in front of the seat occupant.

[0024] 6 and 7, the sleeve body 4 is provided with a table lock mechanism 80 that can restrain the table 70 in the stored state. When the seat 1 is in the long state (specific state), the table lock mechanism 80 directly engages with the table 70 itself to restrain it in the stored state, thereby physically restricting the use of the table 70. The table lock mechanism 80 is disposed inside the sleeve body 4, near the front of the lower end, i.e., immediately below the lower end side 71b of the table tray 71 in the stored state.

[0025] The table lock mechanism 80 has a lock member 81 that is pivotally supported inside the sleeve body 4 and can engage with and disengage from the table 70 in the stored state. The lock member 81 is formed in a bar shape that is long in the front-to-rear direction, and its approximate middle is pivotally supported so as to be pivotable just below the lower end side 71b of the table tray 71 in the stored state via a horizontal pivot 82 in the left-to-right direction. A hook-shaped lock portion 83 that engages and disengages with the lower end side 71b of the table tray 71 is provided at the rear end of the lock member 81, with the pivot 82, which is the swing center, between them, and a spring member 85 is connected to the front end of the lock member 81, which biases the lock portion 83 in a direction that causes it to disengage from the lower end side 71b of the table tray 71.

[0026] A stepped notch 71c is provided on the lower end side 71b of the table tray 71 for engaging and disengaging the locking portion 83 of the locking member 81. Normally, the locking portion 83 on the rear end side of the locking member 81 is disengaged from the notch 71c of the table tray 71 due to the biasing force of the spring member 85, and the locking member 81 does not restrict the table tray 71 to the stored state. However, when the seat 1 is converted to the long state (specific state), the locking member 81 is set to swing in response to this operation in a direction in which the locking portion 83 engages with the notch 71c of the table tray 71 against the biasing force of the spring member 85, thereby restricting the table tray 71 to the stored state.

[0027] 6, a link portion 84 extending downward from the pivot 82 is provided approximately in the middle of the locking member 81, and the output end of a table lock cable 110, which will be described later, is connected to the tip of the link portion 84. The input end of the table lock cable 110 extends to an engaged portion 97 on the side of the rotation operation unit 90, which will be described later. When the seat 1 is in the extended position, the table lock cable 110 is pulled by the engaged portion 97, thereby restraining the table tray 71 in the stored position.

[0028] That is, in the state shown in Figure 7, when link portion 84 is pulled via table lock cable 110, lock member 81 swings clockwise around pivot 82 against the biasing force of spring member 85. Then, as shown in Figure 6, lock portion 83 of lock member 81 directly engages with notch 71c of table tray 71, restraining table tray 71 in the stored state. Table lock cable 110 corresponds to the "transmission means" of the present invention, which connects table lock mechanism 80 with engaged portion 97, which will be described later.

[0029] <Reclining mechanism 50> As shown in Figure 1, the reclining mechanism 50 supports the backrest 3 so that it can be tilted within a predetermined angle range relative to the seat 2. A reclining mechanism 50 is provided independently for each backrest 3 (only one is shown in Figure 1), and is disposed, for example, near the center of the frame 30. Specifically, the reclining mechanism 50 here is composed of a damper 51 such as a gas spring.

[0030] Damper 51, which constitutes reclining mechanism 50, comprises a cylindrical cylinder body 52 filled with gas, and a piston rod 53 inserted so as to be able to protrude and retract into cylinder body 52. Damper 51 is biased in the direction in which piston rod 53 fits into cylinder body 52, but a built-in locking mechanism can fix piston rod 53 in a state in which it protrudes by any amount.

[0031] The rear end of the cylinder body 52 is connected to the lower end of the frame inside the backrest 3 so that it can be pushed and pulled. Meanwhile, the tip of the piston rod 53, which protrudes from the front end of the cylinder body 52, is connected to an appropriate position on the front end side of the underframe 30. This damper 51 makes it possible to hold the backrest 3 at any tilt angle. That is, when the damper 51 is in the locked state, the piston rod 53 is fixed in a state in which it protrudes a predetermined amount from the cylinder body 52, so that the backrest 3 can be held at any tilt angle.

[0032] When the locked state of the damper 51 is released, the backrest 3 returns to its initial, most upright position due to the biasing force of the piston rod 53 that fits into the cylinder body 52. In this unlocked state, the seated person can adjust the backrest 3 to any tilt angle by pushing the backrest 3 backward against the restoring force of the damper 51. The locking mechanism of the damper 51 is a common one and will not be described in detail here, but a release member 54 that releases the locked state is provided next to the piston rod 53.

[0033] The release member 54 is normally biased to maintain the locked state, but is connected to the output end of a reclining operation cable 120 (see FIG. 17), which will be described later. When the reclining operation cable 120 is pulled by operating the reclining operation unit 55, which will be described later, the release member 54 is set to displace in a direction that releases the locked state against the biasing force. The seat apparatus 10 of this embodiment also includes a reclining lock mechanism 100, which will be described later, is capable of restricting the reclining operation unit 55 so that it cannot be operated in conjunction with the restriction of the table lock mechanism 80.

[0034] <Reclining operation part 55> As shown in FIG. 1, the seat 1 is provided with a reclining operation unit 55 for releasing the restriction on the tilt angle of the backrest 3 by the reclining mechanism 50. The reclining operation unit 55 is provided on the left and right sleeve bodies 4 corresponding to the reclining mechanism 50 of each backrest 3. Specifically, the reclining operation unit 55 is configured as a well-known operating lever located on the front end surface of the upper end of the sleeve body 4. In this embodiment, since the table lock mechanism 80 is located on the lower end side of the sleeve body 4, it is possible to secure space on the front end surface of the upper end of the sleeve body 4 to install a lever type with a large pull range for operation rather than a button type with a small pull range.

[0035] The input end of a reclining operation cable 120, which extends to the aforementioned release member 54, is connected to the reclining operation unit 55. When the reclining operation unit 55 is pulled, the reclining operation cable 120 is pulled and the release member 54 to which the operating force is transmitted is displaced, i.e., the restraint of the backrest 3 by the reclining mechanism 50 is released. The reclining operation cable 120 corresponds to the "second transmission means" of the present invention, which transmits the operating force on the reclining operation unit 55 to the reclining mechanism 50.

[0036] <pedestal 11> As shown in Figure 23, the stool 11 is fixed to the floor surface beside the wall W inside the passenger compartment. The stool 11 is configured by combining frame materials in the shape of a long stand extending in a direction (front-to-back direction) approximately perpendicular to the wall W. The upper surface of the stool 11 is approximately horizontal, and this upper surface is surrounded by both side end portions 12, 12 that form the long sides and a rear end portion that forms the short side of the rear side (wall W side), but the front end side (aisle side) is open.

[0037] The base 11 is placed on the floor with its rear end portion in close proximity to and substantially parallel to the wall W. That is, the base 11 is fixed so that both side ends 12, 12 parallel to its longitudinal direction are substantially perpendicular to the wall W, and the front and rear ends parallel to its lateral direction are substantially parallel to the wall W. In addition to a slide mechanism 14 (see FIG. 23 ) described below, related parts such as stoppers that regulate the forward / backward movement range and rotation direction of the underframe 30 are provided on the top surface of the base 11.

[0038] <Slide mechanism 14> As shown in Figure 23, a movable table 20 is attached to the upper surface of the base 11 via a slide mechanism 14 so as to be movable back and forth in a direction substantially perpendicular to the wall W. The slide mechanism 14 has a pair of guide rails 14a, 14a provided on the inside of both side end portions 12, 12 of the base 11. The pair of guide rails 14a, 14a face each other in parallel along both long sides of the upper surface of the base 11, and slide rails (not shown) provided on both side portions 21, 21 of the movable table 20, which will be described below, are slidably fitted into the inside of each guide rail 14a.

[0039] <Mobile stand 20> As shown in Figure 23, the movable platform 20 is arranged approximately horizontally on the upper surface of the base 11, and is formed by combining frame materials into a rectangular framework. Both side portions 21, 21 forming the long sides of the movable platform 20 are slidably fitted inside the pair of guide rails 14a, 14a described above. Therefore, the movable platform 20 can slide forward or backward in a direction approximately perpendicular to the wall W. In addition, a rotation mechanism 40 is provided approximately in the center of the upper surface of the movable platform 20, which supports the seat 1 so that it can rotate around a rotation axis. A peripheral wall portion 22 is provided around the periphery of the movable platform 20.

[0040] <Frame 30> As shown in Figure 23, the underframe 30 is the frame of the entire seat to which the seat 1 is attached and supported, and is rotatably supported on the movable base 20 via a rotation mechanism 40. The underframe 30 is made of, for example, a metal plate having a shape that matches the bottom surfaces of the two adjacent seat portions 2. In other words, the underframe 30 is formed into a substantially rectangular shape that is long in the left-right direction. In addition, the rotation mechanism 40, electric motor 41, etc., which will be described below, are arranged on the underside of the underframe 30.

[0041] <Rotation mechanism 40> As shown in Figure 23, the rotation mechanism 40 supports the frame 30 of the seat 1 on the movable base 20 so that it can rotate in forward and reverse directions on a substantially horizontal plane. Specifically, the rotation mechanism 40 is configured as a unit that includes a pair of inner and outer ring-shaped turntables, with bearings or the like interposed between the turntables and combined so that they can rotate relative to each other. In this rotation mechanism 40, the outer turntable is fixed to the movable base 20, and the inner turntable is fixed to the frame 30.

[0042] The rotation axis around which the seat 1 rotates is the center line of the rotation mechanism 40, and in this embodiment, it does not have a physical entity. As shown in FIG. 26, the rotation mechanism 40 is equipped with an electric motor 41 as a power source. A reducer is attached to the electric motor 41, and a drive gear on the output shaft of the electric motor 41 is rotatably meshed with a sprocket 42 whose center is a rotation axis provided on the underframe 30 side. The rotation mechanism 40 can also be used to rotate the seat manually.

[0043] <Rotation lock mechanism 60> The seat device 10 is equipped with a rotation lock mechanism 60 that prevents the frame 30 (seat 1) from rotating in each of the rotation positions of the long state, the one-cross state, and the reverse-cross state. The rotation lock mechanism 60 locks the frame 30 to prevent it from rotating relative to the base 11, which inevitably prevents the movable base 20 from moving forward or backward relative to the base 11.

[0044] 23, the rotation lock mechanism 60 includes a lock pin 61 that can extend and retract vertically from the base 11 side to the underframe 30, and locking holes 62a, 62b, and 62c that are provided in the underframe 30 and into which the lock pin 61 engages and disengages. Three locking holes 62a, 62b, and 62c are provided in total, one long side of the substantially rectangular underframe 30 that runs along the back of the seat and one short side that runs along both sides of the seat.

[0045] 24, the lock pin 61 is incorporated into the unit 60a, and the unit 60a is fixed near the rear end on the upper surface of the base 11. The lock pin 61 is retractable upward from the upper surface of the base 11, and operates between a locked position where it protrudes upward and fits into the locking holes 62a, 62b, and 62c, and an unlocked position where it retracts downward and is disengaged from the locking holes 62a, 62b, and 62c.

[0046] When the seat 1 is converted into the long position, the one cross position, or the reverse cross position, the lock pin 61 fits into the matching locking holes 62a, 62b, and 62c on the underframe 30 at the top and bottom in each position, thereby restraining the seat 1 so that it cannot rotate. That is, in the long position, the lock pin 61 fits into the locking hole 62a on one long side of the underframe 30. In addition, in the one cross position, the lock pin 61 is inserted into and engages with the locking hole 62b on one short side of the underframe 30. Furthermore, in the reverse cross position, the lock pin 61 fits into the locking hole 62c on the other short side of the underframe 30.

[0047] 24 and 25, unit 60a incorporating lock pin 61 is provided with a spring member (not shown) that constantly biases lock pin 61 to the locked position, causing lock pin 61 to protrude upward, and link 60b that retracts lock pin 61 to the unlocked position downward against the biasing force of the spring member. Although not shown, link 60b is connected to a rotary operation cable 130 for manual operation (see FIG. 26) and the output end of a rotary operation cable for electric operation.

[0048] The lock pin 61 is normally maintained in the locked position by the biasing force of a spring member, but is configured to retract into the unlocked position against the biasing force of the spring member when the link 60b is pulled by a rotation operation cable 130 or the like, which will be described later. Here, the input end side of the rotation operation cable 130 is extended to a rotation operation unit 90 provided on the foot base 11 side. As will be described later, the rotation operation cable 130 (see Figure 26) is pulled by operating the rotation operation unit 90, and the restriction on rotation of the seat 1 by the rotation lock mechanism 60 is released.

[0049] On the other hand, the power source for pulling the rotation operation cable (not shown) for electric operation is, for example, the electric motor 41 of the rotation mechanism 40. That is, the electric motor 41 is equipped with a clutch, and is configured so that by switching the clutch, it is possible to switch between an operation of rotating the seat 1 by the rotation mechanism 40 and an operation of retracting the lock pin 61 to release the lock. Note that the configuration of the clutch of the electric motor 41 is common, so a detailed description will be omitted.

[0050] In the rotation lock mechanism 60 according to this embodiment, when the seat 1 is in the extended position, the restraint imposed by the rotation lock mechanism 60 cannot be released by manual rotation operation of the rotation operation unit 90, but can be released only by electric rotation operation by the electric motor 41. The electric rotation operation here is performed by a train crew member or station staff, and the manual rotation operation is mainly performed by passengers.

[0051] <Rotation operation unit 90> As shown in Fig. 1, the seat 1 is provided with a rotation operation unit 90. The rotation operation unit 90 is used to release the restraint imposed by the lock pin 61 of the rotation lock mechanism 60. As shown in Fig. 28, the rotation operation unit 90 is configured as a unit in which various parts such as a foot pedal 94 are incorporated into a single housing 91, and is fixed, for example, to the peripheral wall 22 hanging down from the front end side of the movable platform 20 (see Fig. 28(b)).

[0052] 28 and 29, the rotary operating unit 90 is provided with a foot pedal 94 that is swingably supported via a pivot 93 at the lower end of a support bracket 92 that is fixed to the front side of a housing 91. The tip end of the foot pedal 94 can swing up and down around the pivot 93, on which the base end is pivotally supported.

[0053] The foot pedal 94 swings between a use position (see Figure 28) where the tip side protrudes forward from the housing 91, and a storage position (see Figure 29) where the tip side retracts upward. The foot pedal 94 is normally biased to the use position where it protrudes forward via a spring member 95. When the foot pedal 94 is in the use position, it can be depressed to release the restraint by the rotation lock mechanism 60, but when the foot pedal 94 is in the storage position, it cannot be released from the restraint by the rotation lock mechanism 60.

[0054] The input end of a rotation control cable 130, which is extended to the rotation lock mechanism 60 side, is connected via a bracket or the like to the base end of the foot pedal 94. When the foot pedal 94, which is in the use position, is depressed downward, the rotation control cable 130 is pulled and the lock pin 61 (see Figure 24) of the rotation lock mechanism 60 is retracted downward, thereby releasing the locked state of the rotation lock mechanism 60.

[0055] Additionally, a pin-shaped engaged portion 97 that protrudes in both directions at a position eccentric to the pivot 93 is fixed to the base end of the foot pedal 94. The input end of a table lock cable 110 that extends from the table lock mechanism 80 is connected to the engaged portion 97 via a bracket. When the engaged portion 97 engages with an engaging portion 99 (described below), the table lock cable 110 is pulled, causing the lock member 81 of the table lock mechanism 80 to swing and lock the table 70 in the stored state.

[0056] <Rotational operation prevention mechanism 98> 26 and 27, the rotation operation unit 90 is provided with a rotation operation preventing mechanism 98 that disables the release operation of the restraint by the rotation operation unit 90. The rotation operation preventing mechanism 98 disables the operation of the foot pedal 94 when the seat 1 is in the long position (specific position). As shown in FIGS. 28 and 29, the rotation operation preventing mechanism 98 is made up of an engaging portion 99 provided on the foot base 11 on the fixed side of the seat 1, and an engaged portion 97 of the rotation operation unit 90 on the movable side of the seat 1.

[0057] The engaging portion 99 is located at the front end of the bottom surface of the base 11 and is formed in the shape of a bracket that protrudes diagonally upward and forward. On the other hand, the engaged portion 97 is provided in the shape of a pin at a position eccentric from the pivot 93 on the base end side of the foot pedal 94, as described above. The engaged portion 97 is set to engage with the engaging portion 99 when the seat 1 is in the long state (specific state). When the engaged portion 97 engages with the engaging portion 99, the foot pedal 94 is swung to the stored position (see Figure 29) against the biasing force of the spring member 95, making it impossible to perform the release operation on the rotation operating unit 90. At the same time, the use of the table 70 is restricted as described above.

[0058] <Interlocking mechanism> The seat device 10 also includes an interlocking mechanism (not shown) that interlocks the rotation and forward / backward movement of the seat 1 so that the seat 1 does not interfere with the wall W when the seat 1 is converted into the long state, one-cross state, or reverse-cross state. The interlocking mechanism is usually provided on the base 11 and the movable base 20.

[0059] When the seat 1 is rotated together with the frame 30, the interlocking mechanism converts the rotation of the frame 30 into linear motion and transmits it to the movable table 20, causing the movable table 20 to move together with the frame 30 in a linear direction toward or away from the wall W. The type of such interlocking mechanism is not particularly limited, but specifically, for example, it is preferable to use the invention described in Japanese Patent No. 6549634 or Japanese Patent No. 6932469, both of which have been proposed by the present applicant.

[0060] <Reclining lock mechanism 100> As shown in Figure 5, the seat 1 is provided with a reclining lock mechanism 100 that can disable the reclining operation unit 55. The reclining lock mechanism 100 is appropriately positioned in an empty space, such as the rear end of each seat portion 2, corresponding to the reclining operation unit 55 of the reclining mechanism 50 in each backrest 3. Note that the reclining lock mechanism 100 is configured as a single unit, as will be described later, and its positioning can be changed as needed.

[0061] 17 to 19, the reclining lock mechanism 100 includes a housing 101 serving as a base, a bracket 114 provided midway along the table lock cable 110, and a lock lever 123 provided midway along the reclining operation cable 120. Here, the bracket 114 and the lock lever 123 are incorporated into the housing 101. Therefore, the table lock cable 110 and the reclining operation cable 120 are each routed to pass through the housing 101. The bracket 114 corresponds to the "restricting portion" of the present invention, and the claw portion 126 at the lower end of the lock lever 123 corresponds to the "restricted portion" of the present invention.

[0062] Housing 101 is formed in the shape of a case as shown in the figure, and a table lock cable 110 and a reclining operation cable 120 are inserted through both side edges of housing 101 so that they are aligned parallel to one another. Table lock cable 110 is inserted through the lower side of housing 101 so as to extend in both directions, and reclining operation cable 120 is inserted through the upper side of housing 101 so as to extend in both directions.

[0063] More specifically, the table lock cable 110 is divided into a table lock input cable 111 whose input end extends toward the rotary operation unit 90, and a table lock output cable 112 whose output end extends toward the table lock mechanism 80. The opposing ends of the table lock input cable 111 and the table lock output cable 112 are connected to each other within the housing 101 via a connecting shaft 113 and a pair of brackets 114, 115. The table lock input cable 111 corresponds to the "input cable" of this invention, and the table lock output cable 112 corresponds to the "output cable" of this invention.

[0064] A guide portion 102 is provided on the bottom side of the housing 101 to support a connecting shaft 113 so that it can move in both directions. The connecting shaft 113 is fitted into and guided by a long groove 103 formed in the front and rear walls of the guide portion 102. As shown in FIG. 19 , an end of a table lock input cable 111 is connected to the rear side of the connecting shaft 113 via a bracket 114, which is a metal fitting with a U-shaped cross section. Meanwhile, an end of a table lock output cable 112 is connected to the front side of the connecting shaft 113 via a bracket 115, which is also a metal fitting with a U-shaped cross section.

[0065] Table lock input cable 111, together with connecting shaft 113 and bracket 114, is urged by auxiliary spring member 116 in a direction in which table lock output cable 112 returns to the table lock mechanism 80 side. Also, as described above, table lock output cable 112 is urged by spring member 85 in table lock mechanism 80 in a direction that does not restrict use of table 70. Here, auxiliary spring member 116 supplements the urging force of spring member 85.

[0066] Reclining operation cable 120 is divided into a reclining operation input cable 121 whose input side extends toward reclining operation unit 55, and a reclining operation output cable 122 whose output side extends toward reclining mechanism 50. Opposing ends of reclining operation input cable 121 and reclining operation output cable 122 are connected to each other via a lock lever 123 inside housing 101. Reclining operation input cable 121 corresponds to the "second input cable" of the present invention, and reclining operation output cable 122 corresponds to the "second output cable" of the present invention.

[0067] 18, lock lever 123 is formed in the shape of a hook as shown in the figure, and is provided on opposing sides of its upper portion with a retaining groove 124 for retaining the end of reclining operation input cable 121 and a retaining groove 125 for retaining the end of reclining operation output cable 122. Retaining grooves 124, 125 are formed in a shape or angle that prevents the retaining pins at the ends of cables 121, 122 from slipping out in the pulling direction. Lock lever 123 is also pivotally supported on housing 101 via pivot 127 so as to be swingable in both directions.

[0068] A groove through which the table lock input cable 111 is inserted is provided in the lower portion, which serves as the swing end of the lock lever 123, and the lower portion of the lock lever 123 is guided in both directions along the inside of the guide portion 102. One end of the groove at the lower portion of the lock lever 123 is provided as a claw portion 126 that protrudes toward the bracket 114. When the seat 1 is in the cross position, as shown in Figures 18 and 19, the claw portion 126, which is the regulated portion, is disengaged from the bracket 114, which is the regulating portion. In this state, by operating the reclining operation portion 55, the entire reclining operation cable 120 can be pulled in the leftward direction in the figure, allowing the seat to be reclined.

[0069] On the other hand, when the seat 1 is in the extended position, as shown in Figures 21 and 22, the entire table lock cable 110 is pulled to the right in the figures against the biasing forces of the spring member 85 and the auxiliary spring member 116, and the bracket 114 moves to a position where it engages with the claw portion 126. In this state, the entire reclining operation cable 120 cannot be pulled to the left in the figures by operating the reclining operation unit 55, and as a result, the seat cannot be reclined. In other words, when the seat 1 is in the extended position, the bracket 114 engages with the claw portion 126, thereby restricting the movement of the reclining operation cable 120.

[0070] <Function of the seat device 10> The operation of the seat device 10 according to this embodiment will be explained below in order, focusing on the restriction of use of the table 70 by the operation of the table lock mechanism 80, the restriction of tilting of the backrest 3 by the operation of the reclining lock mechanism 100, and the change in the state of the entire seat 1.

[0071] <<Operation of the table lock mechanism 80>> First, the operation of the table lock mechanism 80 will be described. 26, when the seat 1 is in the cross state, the engaged portion 97 on the movable platform 20 side is separated from the engaging portion 99 on the leg base 11 side. Therefore, the engaged portion 97 does not rotate (displace), and the table lock cable 110 is not pulled and is in an open state.

[0072] At this time, in the table lock mechanism 80, as shown in Fig. 7, the front end side of the lock member 81 is pulled upward by the biasing force of the spring member 85, and conversely, the lock part 83 on the rear end side moves downward, and the lock part 83 is disengaged from the notch 71c of the table tray 71. Therefore, after opening the armrest 5 as shown in Fig. 2, the table 70 can be taken out of the sleeve body 4 and used as shown in Fig. 3.

[0073] When using the table 70, as shown in Figures 11 to 13, with the armrest 5 open, the table 70 is pulled out from the sleeve body 4 and rotated forward 180 degrees. Next, as shown in Figures 14 to 16, the table 70 is tilted to the side approximately horizontally. This causes the table 70 to unfold in an approximately horizontal position in front of the seated person. The table tray 71, which is the table 70, is not a two-fold structure but a single piece and can be used as is.

[0074] On the other hand, as shown in Figure 27, when the seat 1 is converted into the long position, the engaged portion 97 on the movable base 20 engages with the engaging portion 99 on the base 11. Then, as shown in Figure 29, the engaged portion 97 is pushed and rotates (displaces) in the direction pulling the table lock cable 110 against the biasing force of the spring member 95. The conversion of the seat 1 into the long position is performed by the operation described below, for example, during peak times such as rush hour.

[0075] When the table lock cable 110 is pulled in conjunction with the rotation (displacement) of the engaging portion 97, in the table lock mechanism 80, as shown in FIG. 6, the link portion 84 of the locking member 81 is pulled against the biasing force of the spring member 85, causing the locking member 81 to swing clockwise around the pivot 82. As a result, the locking portion 83 of the locking member 81 directly engages with the notch 71c of the table tray 71. As a result, the table tray 71 cannot be removed from inside the sleeve body 4, and the operation of pulling out and unfolding the table 70 is physically restricted. As a result, when the seat 1 is extended when the vehicle is crowded, there is no risk that the unfolded table 70 will hinder passengers from getting on or off.

[0076] <<Operation of the Reclining Lock Mechanism 100>> Next, the operation of the reclining lock mechanism 100 will be described. According to the reclining lock mechanism 100 of this embodiment, when the seat 1 is converted to the long state, the operation of tilting the backrest 3 by the reclining mechanism 50 can be restricted in conjunction with the operation of the table lock mechanism 80 described above.

[0077] When the seat 1 is in the cross position, the table lock cable 110 is not pulled by the engaged portion 97 and is in a released state. That is, in the recliner lock mechanism 100, as shown in Figures 17 to 19, the table lock cable 110 is not pulled to the right in the figures. Therefore, the connecting shaft 113 connecting the table lock input cable 111 and the table lock output cable 112 has moved to the left end of the guide portion 102 in the housing 101 due to the biasing forces of the spring member 85 and auxiliary spring member 116 described above.

[0078] As a result, bracket 114, which is a restricting part connected to connecting shaft 113, is disengaged from claw 126, which is a restricted part of lock lever 123 that connects reclining operation input cable 121 and reclining operation output cable 122. Reclining operation cable 120 can be operated by the amount of the pulling force of this disengagement. Therefore, when reclining operation unit 55 is operated, reclining operation cable 120 is pulled, and the restraint of backrest 3 in reclining mechanism 50 is released, allowing the seat occupant to tilt backrest 3 to any angle.

[0079] On the other hand, when the seat 1 is converted to the long state, as shown in Figures 20 to 22, the table lock cable 110 is pulled to the right in the figures against the biasing forces of the spring member 85 and the auxiliary spring member 116 in accordance with the rotation (displacement) of the engaged portion 97 described above. As a result, the connecting shaft 113 moves to the right end of the guide portion 102 in the housing 101, and the bracket 114 engages with the claw portion 126 of the lock lever 123.

[0080] This restricts the movement of the reclining operation cable 120 in the operating direction, which is the left side in the figure. In other words, the reclining operation unit 55 cannot be operated, and the backrest 3 cannot be reclined by the reclining mechanism 50. Therefore, when the seat 1 is in the long position, not only is the use of the table 70 restricted as described above, but the reclining operation of the backrest 3 by the seat occupant can also be reliably prevented, preventing the backrest 3 from accidentally tilting and interfering with the wall W.

[0081] <<Converting the state of seat 1>> Next, the change in the state of seat 1 will be described with reference to FIG. As shown in Figure 30(a), when the seat 1 is in the long position, the rotation mechanism 40 is at a position closest to the wall W, the back of the backrest 3 is approximately parallel to the wall W, and the rotation angle of the seat is 0 degrees. In this long position, the base frame 30 is constrained so as not to rotate relative to the movable base 20, and the movable base 20 is constrained so as not to slide relative to the base 11.

[0082] At this time, in the rotation lock mechanism 50, the lock pin 61 shown in Figure 24 is fitted into the locking hole 62a (see Figure 23) on one long side of the underframe 30. Here, the lock pin 61 protrudes from the foot base 11, which is the fixed side of the seat 1, so not only is the seat 1 unable to rotate, but at the same time it is also unable to slide.

[0083] Furthermore, when the seat 1 is in the extended position, the rotation operation prevention mechanism 98 prevents the release operation of the rotation operation unit 90, as shown in Figure 29. That is, in the extended position, the engaged portion 97 of the foot pedal 94 on the movable base 20 side engages with the engaging portion 99 on the foot base 11 side. Then, the foot pedal 94 swings to the upright storage position against the biasing force of the spring member 95, and is restrained in that storage position.

[0084] As a result, when the seat 1 is in the extended position, the foot pedal 94 is not simply displaced to a stowed position where it cannot be operated, but is firmly held in the stowed position by the engagement between the engaging portion 99 and the engaged portion 97. Therefore, in the extended position, the release operation of the rotation operating portion 90 is disabled. With this simple configuration, it is possible to reliably prevent the rotation of the seat 1 by the occupant in the extended position.

[0085] Next, as shown in Figures 30(a) to 30(c), to convert the seat 1 from the long position to the cross position (rotation angle 90 degrees), it is first necessary to release the restriction on rotation imposed by the rotation lock mechanism 60. Here, the operation of removing the lock pin 61 from the locking hole 62a cannot be performed by operating the foot pedal 94 as described above, but is performed electrically using the power of the electric motor 41.

[0086] In the long state shown in Figure 30(a), after the restraint by the rotation lock mechanism 60 is released, when the seat 1 is rotated in the forward direction (counterclockwise in Figure 30) by the electric motor 41 as shown in Figure 30(b), the seat 1 rotates forward while being driven by an interlocking mechanism (not shown). That is, the seat 1 rotates forward toward the aisle while rotating in the forward direction so as not to interfere with the wall W.

[0087] As shown in Figure 30(c), when the seat 1 reaches the one-cross position (rotation angle 90 degrees), the lock pin 61 of the rotation lock mechanism 60 in Figure 23 fits into the locking hole 62b on one short side of the underframe 30. This prevents the seat 1 from rotating in the one-cross position.

[0088] Furthermore, when the seat 1 is in the cross position, the rotation operation preventing mechanism 98 is released from restricting the operation of the rotation operation unit 90. That is, in the cross position shown in Figure 30(c), the engaged portion 97 of the foot pedal 94 on the movable platform 20 side does not engage with the engaging portion 99 on the foot platform 11 side, and is separated. Therefore, the foot pedal 94 is in the use position where it protrudes forward due to the biasing force of the spring member 95.

[0089] At this time, the occupant of the seat 1 can release the restraint imposed by the rotation lock mechanism 60 by stepping on the foot pedal 94. That is, in Figure 28, when the foot pedal 94 is stepped on and rocked, the rotation operation cable 130 is pulled and the lock pin 61 (see Figure 24) retracts downward, releasing the locked state of the rotation lock mechanism 60. This allows the occupant to rotate the seat 1 manually.

[0090] Furthermore, in the one cross state shown in Figure 30(c), if the rotation lock mechanism 60 is released and the seat 1 is rotated in the opposite direction (clockwise in Figure 30), the seat 1 will move backward or forward while rotating due to an interlocking mechanism (not shown). Next, while temporarily held in the forward position parallel to the long state, the seat 1 will rotate in the opposite direction without moving forward or backward.

[0091] As shown in Figure 30(d), when the seat 1 reaches the reverse cross position (rotation angle -90 degrees), the lock pin 61 of the rotation lock mechanism 60 fits into the locking hole 62c on the other short side of the underframe 30, and the underframe 30 is once again restricted from rotating. This conversion of the seat 1 from the one cross position to the reverse cross position can be performed not only manually but also electrically. Note that to return the seat 1 from the reverse cross position to the one cross position and then from the one cross position to the original long position, it is sufficient to perform the reverse operations of the conversion from the long position to the one cross position and from the one cross position to the reverse cross position, respectively.

[0092] <Configuration and effects of the present invention> Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments. The present invention was made in consideration of the problems of the prior art described above, and aims to reliably and easily restrict the use of the table 70 only when the seat 1, which can be converted into a long position or a cross position, is in a specific position (long position) in which use of the table 70 becomes problematic, when the table 70 is installed in the seat 1.

[0093] To achieve this goal, the present inventors have already proposed a seating device in Japanese Patent Application No. 2022-200882 that restricts the use of the table 70 only when the seat 1 is in the extended position. This seating device is configured so that the table tray stored inside the sleeve body cannot be removed by locking the armrest that opens and closes the upper end opening of the sleeve body.

[0094] However, this type of seat device presents the following new problem: In order to lock the armrest, a locking mechanism must be provided at the upper end of the interior of the sleeve body. Therefore, since there is less space available at the upper end of the interior of the sleeve body for arranging other components, it is not possible to provide a lever-type mechanism with a large operating stroke (pulling distance) for the reclining operation, for example, and so the seat device is limited to a button-type mechanism with a small operating stroke.

[0095] In addition, due to the structure that locks the front end of the armrest, the armrest opens vertically, which means the armrest has a long stroke when opening and closing, making operation inconvenient. Furthermore, when pulling out the table from inside the sleeve body, the table needs to be compact to avoid interference with the open armrest, so the table has a two-fold structure. Further improvements to solve these new issues in the seat device were desired.

[0096] The present invention, which is derived from the above-described embodiment and new problems in the seat device, will be described below. First, the present invention provides a seat device 10 capable of changing the state of a seat 1, a table 70 operable between a storage state where it is stored to the side of the seat 1 and a usage state where it is pulled out and deployed in front of the seat occupant; a table lock mechanism 80 that locks the table 70 in a stored state when the seat 1 is in a specific state; The table lock mechanism 80 has a locking part 83 that can be engaged with and disengaged from the table 70 when the table 70 is in a stored state, and when the seat 1 is converted into a specific state, the locking part 83 directly engages with the table 70 itself to restrain it in the stored state.

[0097] In this seating device 10, the state of the seat 1 can be changed between a long state in which the seat is arranged along the wall W and a cross state in which the seat is perpendicular to the wall W, and is normally operated in the long state during rush hour or other times to provide more space for passengers to stand. In this long state, if the table 70 of the seat 1 is unfolded, it may become an obstacle to passengers getting on and off in a crowded vehicle.

[0098] Therefore, in the present seating device 10, when the seat 1 is in this specific state (long state), the table lock mechanism 80 can restrain the table 70 in the stored state and restrict the operation of pulling it out. This allows a table 70 that can be pulled out from the side of the seat 1 to be installed without any problems even in a seating device 10 in which the state of the seat 1 can be changed. Note that when the seat 1 is in a state other than the specific state (long state) (cross state), the use of the table 70 is not restricted, thereby improving convenience when sitting.

[0099] In particular, the table lock mechanism 80 has a locking part 83 that can be engaged with and disengaged from the table 70 when the table 70 is in the stored state, and when the seat 1 is converted to a specific state (long state), the locking part 83 directly engages with the table 70 itself to restrain it in the stored state. Because the locking part 83 thus directly restrains the table 70, the location of the table locking mechanism 80 is not limited to the upper end side inside the sleeve body 4, as compared to, for example, a case in which the table 70 is indirectly restrained by locking the armrest 5 that opens and closes the sleeve body 4.

[0100] 6, the table lock mechanism 80 can be located at the lower end of the sleeve 4, where there is relatively more space for arranging components. This allows for more space to be secured for arranging other components closer to the front of the upper end of the sleeve 4. For example, the reclining operation unit 55 can be configured as a lever-type unit with a long operating stroke, rather than a button-type unit with a short operating stroke. Such a lever-type reclining operation unit 55 has a large pull, making reclining adjustment easier and providing greater ease of operation for the seat occupant.

[0101] The present invention also provides an engaging portion 99 provided on the fixed side of the seat 1, an engaged portion (97) that is provided on the movable side of the seat (1) and that engages with the engaging portion (99) and is displaced when the seat (1) is in the specific state; The engaged portion 97 and the table lock mechanism 80 are connected to each other via a transmission means 110. When the displacement of the engaged portion 97 is transmitted to the table locking mechanism 80 via the transmission means 110, the locking portion 83 is configured to directly engage with the table 70 itself and restrain it in the stored state.

[0102] With this configuration, table 70 can be restrained in the stored state by table lock mechanism 80 with a simple configuration and without using electric power, due to the mechanical engagement relationship between engaging portion 99 and engaged portion 97. Here, the displacement of engaged portion 97 is transmitted to table lock mechanism 80 via transmission means 110, so it is possible to freely lay out engaging portion 99, engaged portion 97, and table lock mechanism 80 in appropriate locations that are separated from each other.

[0103] In addition, in the present invention, a sleeve body 4 capable of storing the table 70 is provided on the side of the seat 1, The upper end of the sleeve body 4 extending in the front-rear direction can be opened and closed in the left-right direction as an armrest 5 that covers the inside of the storage area for the table 70. When stored inside the sleeve body 4, the table 70 is characterized by being arranged in an inclined position from the upper end to the lower end, with the upper end being farther away from the vertical outer surface of the sleeve body 4.

[0104] In this way, the table 70 in this seat device 10 can be an in-arm table that can be stored in the sleeve body 4 on the side of the seat 1. Here, the opening and closing direction of the armrest 5 that covers the inside of the sleeve body 4 can be changed to a horizontal opening with a compact trajectory, rather than a vertical opening with a large opening and closing stroke trajectory as in the case of locking the armrest 5, which not only improves operability but also makes it possible to avoid interference with the table tray 71.

[0105] Furthermore, by arranging the table 70 (table tray 71) in an inclined position when stored inside the sleeve body 4, the dimension from the top to the bottom in the stored state, i.e., the dimension from one end to the other in the left-right direction when in use (width), can be made longer than if the table 70 were hanging down vertically. Therefore, the table tray 71 can be formed as a single piece without the conventional two-fold structure, and handling is also improved.

[0106] Furthermore, as shown in Fig. 9, if the inner surface 4b of the sleeve body 4 is shaped so that it approaches the vertical outer surface 4a from its upper end to its lower end, it is possible to prevent the table 70 in the stored state from interfering with the inner surface 4b. In this embodiment, as shown in Figs. 9 and 2, the inner surface 4b of the sleeve body 4 hangs down parallel to the outer surface 4a at the upper end, but hangs down in a recessed manner so that it approaches the outer surface 4a from the middle, thereby ensuring as much space as possible for arranging both side ends of the seat 2.

[0107] In addition, the present invention includes a reclining mechanism 50 that can tilt the backrest of the seat 1, The locking portion 83 directly engages with the table 70 itself to restrain it in the stored state, thereby disabling the operation of tilting the backrest by the reclining mechanism 50.

[0108] With this configuration, when the seat 1 is in a specific state (long state), it is possible to restrict the use of the table 70 and at the same time reliably restrict the tilting of the backrest 3. Therefore, when the seat 1 is in a specific state (long state), it is possible to prevent the backrest 3 from tilting due to the occupant's reclining operation and interfering with the wall W. Note that when the seat 1 is in a state other than the specific state (long state) (cross state), it is possible to tilt the backrest 3, improving sitting comfort.

[0109] The present invention also provides a reclining operation unit 55 for operating the reclining mechanism 50 to tilt the backrest; a reclining lock mechanism 100 capable of restricting the reclining operation unit 55 so that it cannot be operated; a second transmission means (120) that connects the reclining operation unit (55) and the reclining mechanism (50) to each other and transmits an operating force on the reclining operation unit (55) to the reclining mechanism (50); The reclining lock mechanism 100 has a restricting portion 114 provided midway through the transmission means 110 and a restricted portion 126 provided midway through the second transmission means 120, When the seat 1 is in a specific state and the transmission means 110 transmits the displacement of the engaged portion 97 to the locking portion 83, the regulating portion 114 engages with the regulated portion 126 to regulate the movement of the second transmission means 120, thereby restraining the reclining operating portion 55 so that it cannot be operated.

[0110] With this configuration, when the seat 1 is in a specific position (long position), the reclining operation unit 55 that operates the reclining mechanism 50 is restricted from operation by the reclining lock mechanism 100. This prevents the seat occupant from reclining at all, making it easy for the seat occupant to understand and restrict the tilting of the backrest 3. Furthermore, because the reclining lock mechanism 100 is provided midway between the transmission means 110 and the second transmission means 120, it can be freely laid out in an appropriate location depending on the wiring of these means.

[0111] Moreover, due to the mechanical engagement between the restricting portion (bracket) 114 and the restricted portion (claw portion) 126, the reclining operation portion 55 can be restricted to be inoperable with a simple configuration and without using electric power. Here, the displacement of the restricting portion 114 is linked to the displacement of the engaged portion 97, so in addition to restricting the use of the table 70, the restriction of the backrest 3 to be unable to tilt can be reliably synchronized. Furthermore, because the restricting portion 114 directly restricts the movement of the second transmission means 120, the configuration of the reclining lock mechanism 100 can be simplified.

[0112] In the present invention, the transmission means 110 includes an input cable 111 connected to the engaged portion 97 side and an output cable 112 connected to the lock portion 83 side, The input cable 111 and the output cable 112 are connected via the restricting portion 114, The second transmission means 120 includes a second input cable 121 connected to the reclining operation unit 55 side and a second output cable 122 connected to the reclining mechanism 50 side, The second input cable 121 and the second output cable 122 are connected via the regulated portion 126, The restricting portion 114 and the restricted portion 126 are housed in the same housing 101, and the reclining lock mechanism 100 is characterized by being configured as a unit.

[0113] With this configuration, the reclining lock mechanism 100 can be easily retrofitted between the transmission means 110 and the second transmission means 120. Moreover, the reclining lock mechanism 100 can be easily handled as a unit, and the installation process can also be performed easily.

[0114] The present invention also provides a rotation mechanism 40 that rotates the seat 1 around a rotation axis; a slide mechanism 14 for moving the seat 1 together with the rotation mechanism 40 back and forth from the fixed side, The rotation mechanism 40 and the slide mechanism 14 are interlocked to change the state of the seat 1 as follows: The back of the seat is in a long state, with the back of the seat roughly parallel to the wall. The long state can be converted into a cross state in a direction substantially perpendicular to the long state and away from the wall, The particular state of the seat 1 is characterized by corresponding to the long state.

[0115] This allows the seat device 10 to be applied as is to well-known rotating seats mounted on railway vehicles, as described in the above-described embodiment.

[0116] Furthermore, the present invention provides a seat 1 having a fixed side, which is a base 11 fixed on the floor surface, a movable base 20 attached to the base 11 via the slide mechanism 14 so as to be movable forward and backward, and having a frame of the seat 1 rotatably supported via the rotation mechanism 40, as a movable side of the seat 1; The engaging portion 99 is provided on the base 11, The engaged portion 97 is characterized by being provided on the moving table 20.

[0117] According to the present seat device 10, it is possible to realize a layout in which the engaging portion 99 and the engaged portion 97 are arranged in accordance with the optimum components among the minimum necessary components of the seat device 10.

[0118] Although the embodiments have been described above with reference to the drawings, the specific configurations are not limited to these embodiments, and modifications and additions that do not depart from the gist of the present invention are also included in the present invention. For example, the shapes of the base 11, the movable base 20, and the base frame 30, as well as the specific configurations of the table lock mechanism 80, the reclining lock mechanism 100, etc. are not limited to those shown in the drawings.

[0119] Furthermore, the specific routing of the power transmission system, the table lock cable 110 and the reclining operation cable 120, is not limited to that shown in the figure. Although the seat 1 is described as a two-seater, it may be a three-seater or a one-seater. Furthermore, the state of the seat 1 is not limited to the long state, one-cross state, and reverse-cross state. [Industrial Applicability]

[0120] The present invention can be widely used as a seating device for vehicles such as those installed in the passenger compartments of railway cars, airplanes, automobiles, ships, etc., as well as for theater, home, and office chairs. [Explanation of symbols]

[0121] 10...Seating device 11...Step stool 14...Slide mechanism 20...Mobile stand 30...frame 40...Rotation mechanism 50...Reclining mechanism 55...Reclining control section 60...Rotation lock mechanism 70...table 80...Table lock mechanism 81...locking member 82...Axis 83...Rock Club 90...Rotation control section 94...Foot pedal 97...Engaged portion 98...Rotation operation prevention mechanism 99...Engagement part 100...Reclining lock mechanism 110...Table lock cable 114...Bracket (restriction part) 120...Reclining control cable 123...Lock lever 126...Claw part (regulated part) 130...Rotation control cable

Claims

1. In a seating device capable of changing the state of a seat, A table that can be operated between a stored state where it is stored at the side of the seat and a used state where it is pulled out and deployed in front of the seat occupant; a table lock mechanism that locks the table in a stowed state when the seat is in a specific state, The table lock mechanism has a locking part that can be engaged with and disengaged from the table when the table is in a stored state, and when the seat is converted into a specific state, the locking part directly engages with the table itself to restrain it in the stored state.

2. An engagement portion provided on the fixed side of the seat; an engaged portion that is provided on the movable side of the seat and that engages with the engaging portion and displaces when the seat is in the specific state; The engaged portion and the table lock mechanism are connected to each other via a transmission means, 2. The seat device according to claim 1, wherein when the displacement of the engaged portion is transmitted to the table locking mechanism via the transmission means, the locking portion is configured to directly engage with the table itself and restrain it in the stored state.

3. A sleeve body capable of storing the table is provided on the side of the seat, The upper end of the sleeve body extending in the front-rear direction can be opened and closed in the left-right direction as an armrest to cover the inside of the storage area for the table, The seat device according to claim 2, characterized in that, when stored inside the sleeve body, the table is arranged in an inclined position from the upper end to the lower end, with the table being spaced further away from the vertical outer surface of the sleeve body as it approaches the upper end.

4. Equipped with a reclining mechanism that allows the seat back to be tilted, 4. The seat device according to claim 3, wherein the locking portion directly engages with the table itself to restrain it in the stored state, thereby disabling the operation of tilting the backrest by the reclining mechanism.

5. a reclining operation unit that operates the reclining mechanism to tilt the backrest; a reclining lock mechanism capable of restricting the reclining operation unit so that it cannot be operated; a second transmission means for connecting the reclining operation unit and the reclining mechanism to each other and transmitting an operating force on the reclining operation unit to the reclining mechanism, The reclining lock mechanism has a restricting portion provided midway along the transmission means and a restricted portion provided midway along the second transmission means, 5. The seat device according to claim 4, wherein when the seat is in a specific state and the transmission means transmits the displacement of the engaged portion to the locking portion, the restricting portion engages with the restricted portion to restrict the movement of the second transmission means and restrain the reclining operating portion so that it cannot be operated.

6. the transmission means includes an input cable connected to the engaged portion side and an output cable connected to the locking portion side, the input cable and the output cable are connected via the restricting portion, the second transmission means includes a second input cable connected to the reclining operation unit and a second output cable connected to the reclining mechanism, the second input cable and the second output cable are connected via the regulated portion, 6. The seat device according to claim 5, wherein the restricting portion and the restricted portion are housed in the same housing, and the reclining lock mechanism is configured as a unit.

7. a rotation mechanism that rotates the seat around a rotation axis; a slide mechanism for moving the seat together with the rotation mechanism back and forth from the fixed side, The rotation mechanism and the slide mechanism are interlocked to change the seat state. The long state where the back of the seat is roughly parallel to the wall, The long state can be converted into a cross state in a direction substantially perpendicular to the long state and away from the wall, 7. The seating apparatus according to claim 6, wherein the specific state of the seat corresponds to the long state.

8. A base fixed on the floor as the fixed side of the seat; a movable base attached to the base via the slide mechanism so as to be movable forward and backward, and having a seat frame rotatably supported via the rotation mechanism, as a movable side of the seat; The engaging portion is provided on the base, 8. The seat device according to claim 7, wherein the engaged portion is provided on the movable base.

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