JP7725533B2 - Seating device - Google Patents

Description

The present invention relates to a seating device that allows the seat state to be changed.

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

With such rotating seats, 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 (turning radius) does not interfere with the wall. Therefore, seating devices have already been proposed for this type of rotating seat, which include a sliding mechanism in addition to a seat rotation mechanism, and a transmission mechanism that links the sliding mechanism to the rotation mechanism (see, for example, Patent Document 1).

In other words, in this seating arrangement, in order to maximize the aisle width between seats on both sides in the passenger compartment and ensure a comfortable space, when in the long position the seat's rotation axis is positioned against the wall, while when in the cross position the seat's rotation axis slides toward the aisle so that the seat does not interfere with the wall. In general, with rotating seats, including this type of seating arrangement, the seats are converted to the long position during peak times such as rush hour.

It is also known that railway vehicle seats are equipped with tables for the convenience of the occupant. The tables are typically stored in the sleeves below the armrests, and are configured so that they can be pulled out and deployed by opening and closing the armrests (see, for example, Patent Document 2). The installation of such tables in these seating devices has been considered.

Patent No. 3431772 Japanese Patent Application Laid-Open No. 2008-74396

However, if a table were installed on the conventional rotating seats mentioned above, there would be no particular problem if the table was unfolded when the seats were in the cross position, but if the table was unfolded when the seats were in the extended position, there was a risk that it would hinder passengers getting on and off during crowded times. Therefore, in order to install a table on a rotating seat, some kind of measure was needed to allow the seat to be in the extended position.

The present invention was developed in response to the problems with the prior art described above, and aims to provide a seating device that, when mounted on a rotating seat, can reliably and easily restrict the use of the table only when the seat is in a specific state (long state) where use of the table becomes problematic.

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.

The seating device of the present invention allows a table to be installed and used even when the seat state is changeable, restricting use of the table only in specific states where use of the table is problematic, while allowing the table to be used in all other states for the convenience of the seated person.

1 is a perspective view showing a part of the internal structure of a seat device according to an embodiment of the present invention. 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. 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. 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. 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. 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. 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. 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. 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. 1A and 1B are a perspective view and a front view showing a position of a table of a seating device according to an embodiment of the present invention in a stored state; 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. 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. 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. 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. 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. 1A and 1B are a perspective view and a front view showing the posture of a table of a seat device according to an embodiment of the present invention in an unfolded state; 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. 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. 19 is a cross-sectional view taken along line AA in FIG. 18. 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. 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. This is a cross-sectional view of line BB in Figure 21. 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. 1 is a perspective view showing a rotation lock mechanism of a seat device according to an embodiment of the present invention. 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. 1 is a front view showing a cross state of a seat device according to an embodiment of the present invention; 1 is a side view showing a seat device according to an embodiment of the present invention in a long state; 1A and 1B are a side view and a perspective view showing a rotation operating section of a seat device according to an embodiment of the present invention in a cross state. 1A and 1B are a side view and a perspective view showing a rotation operating section of a seat device according to an embodiment of the present invention in a long state; 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.

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 the shapes of the same parts in each figure are merely design changes (for example, differences in the shapes of the backrest 3 and foot rest 11 between Figures 1 and 26).

<Overview of seat device 10>
As shown in Fig. 1, the seat device 10 comprises a base 11 fixed to the floor, 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" in the present invention, and the movable base 20 and the frame 30 correspond to the "movable side of the seat 1" in the present invention. The seat device 10 is placed on the floor near 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.

As shown in Figures 1 and 23, the seat 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 Figure 23) so that it can move back and forth together with the rotation mechanism 40. Furthermore, the seat device 10 is equipped with a linkage mechanism (not shown) for linking the rotation of the seat 1 by the rotation mechanism 40 with the movement of the seat 1 by the slide mechanism 14.

<Seat 1>
As shown in Figure 1, the seat 1 is, for example, a two-seater, and comprises a pair of 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 the seat portion 2 so that it can be tilted via a reclining mechanism 50 (described later). The seat 1 is surrounded on both sides 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. The sleeves 4 are also provided with a table 70, known as an in-arm table, on which the seated person can place items.

<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 30(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 collectively to the one-cross state and the reverse-cross state, 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.

Figures 1 to 3 show the seat device 10 when the seat 1 is in the one-cross state. Figures 4 and 5 show the seat device 10 when the seat 1 is in the long state. As shown in Figure 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 90 degrees in one direction (counterclockwise in Figure 30) from the long state results in the one-cross state, and rotating the seat 1 90 degrees in the opposite direction (clockwise in Figure 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.

<Table 70>
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 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 seat occupant. The interior of the sleeve body 4 forms 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.

The armrest 5 is made, for example, of a narrow plate-shaped material covered with a cushioned cover. As shown in Figure 11, one side end of the front 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 horizontally, rather than vertically, in the front-to-back direction. More specifically, as shown in Figure 6, the table 70 comprises 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.

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, near the front of the upper end, so as to extend vertically. 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.

As a result, as shown in Figures 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 an inclined position relative to the vertical outer surface 4a of the sleeve body 4. In other words, when the table 70 is in the stored position, the upper end side 71a to the lower end side 71b of the table tray 71 is positioned in an inclined position, spaced apart from the vertical outer surface 4a of the sleeve body 4 by approximately the distance of the upper end side 71a.

As shown in Figures 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 then hangs down in a stepped manner as it approaches 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 position described above makes it possible to maximize the size (surface area) of the table tray 71 within the 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.

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 that it can rotate left and right, 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 also provided with a well-known stopper structure to stop and hold the rotation of the table tray 71 at an angle from its upright position slightly tilted toward the inside of the seat (see Figure 12) to its horizontal, usable position. 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 usable position where it is extended out in front of the seat occupant.

<Table lock mechanism 80>
6 and 7, the sleeve body 4 is provided with a table lock mechanism 80 that can lock 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 lock 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 71b of the table tray 71 in the stored state.

The table locking mechanism 80 is pivotally supported within the sleeve body 4 and has a locking member 81 that can engage and disengage with the table 70 in the stored state. The locking member 81 is shaped like a long bar extending in the front-to-rear direction, and its approximate middle is pivotally supported via a horizontal pivot 82 in the left-to-right direction, directly below the lower end 71b of the table tray 71 in the stored state. At the rear end of the locking member 81, across the pivot 82, which is the center of its swing, a hook-shaped locking portion 83 is provided that engages and disengages with the lower end 71b of the table tray 71, and a spring member 85 is connected to the front end that biases the locking portion 83 in a direction that disengages it from the lower end 71b of the table tray 71.

The lower end 71b of the table tray 71 is provided with a stepped notch 71c for engaging and disengaging the locking portion 83 of the locking member 81. Normally, the locking portion 83 on the rear end 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 table tray 71 is not restrained in the stowed state. However, when the seat 1 is converted to the long position (specific state), this action causes the locking member 81 to swing in the 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, restraining the table tray 71 in the stowed state.

More specifically, as shown in Figure 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 the table lock cable 110, described below, 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 rotation operation unit 90, described below. When the seat 1 is in the extended position, the table lock cable 110 is pulled by the engaged portion 97, restraining the table tray 71 in the stored position.

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

<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 is composed of a damper 51 such as a gas spring.

The damper 51 that makes up the reclining mechanism 50 comprises a cylindrical cylinder body 52 filled with gas, and a piston rod 53 inserted retractably into the cylinder body 52. The damper 51 is biased in the direction in which the piston rod 53 fits into the cylinder body 52, but a built-in locking mechanism can lock the piston rod 53 in a protruding position to any desired extent.

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 extends and retracts from the front end of the cylinder body 52, is connected to an appropriate position on the front end of the underframe 30. This damper 51 allows the backrest 3 to be held at any tilt angle. In other words, when the damper 51 is locked, the piston rod 53 is fixed in a state where it protrudes a specified amount from the cylinder body 52, allowing the backrest 3 to be held at any tilt angle.

When the damper 51 is released from its locked state, the piston rod 53 fits into the cylinder body 52, causing the backrest 3 to return to its most upright initial position. In this unlocked state, the occupant can push the backrest 3 backward against the restoring force of the damper 51, allowing the backrest 3 to be adjusted to any desired tilt angle. The locking mechanism for the damper 51 is conventional and will not be described in detail here, but a release member 54 that releases the lock is provided next to the piston rod 53.

The release member 54 is normally biased to maintain the locked state, but is connected to the output end of the reclining operation cable 120 (see Figure 17), which will be described later. When this reclining operation cable 120 is pulled by operating the reclining operation unit 55, which will be described next, the release member 54 is configured to displace in a direction that releases the locked state against the biasing force described above. The seat device 10 of this embodiment also includes a reclining lock mechanism 100, which, as 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.

<Reclining operation unit 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 disposed on the front end surface of the upper end of the sleeve body 4. In this embodiment, since the table lock mechanism 80 is disposed on the lower end side of the sleeve body 4, it is possible to secure space for disposing a lever type with a large pull range on the front end surface of the upper end of the sleeve body 4 instead of a button type with a small pull range for operation.

The input end of the reclining operation cable 120, which extends to the 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. In other words, 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.

<Step stand 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 form of a long stand extending in a direction (front-to-rear 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 on the rear side (wall W side), but the front end side (aisle side) is open.

The base 11 is placed on the floor with its rear end in close proximity to and generally parallel to the wall W. That is, the base 11 is fixed so that its both side ends 12, 12 parallel to its longitudinal direction are generally perpendicular to the wall W, and its front and rear ends parallel to its lateral direction are generally parallel to the wall W. The top surface of the base 11 is provided with a slide mechanism 14 (see Figure 23), which will be described below, as well as related parts such as stoppers that regulate the forward/backward movement range and rotation direction of the frame 30.

<Slide mechanism 14>
23, a movable platform 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 platform 20, which will be described below, are slidably fitted into the inside of each guide rail 14a.

<Moveable 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 that supports the seat 1 rotatably around a rotation axis is provided approximately in the center of the upper surface of the movable platform 20. A peripheral wall portion 22 is provided around the periphery of the movable platform 20.

<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 seat portions 2 arranged side by side. 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.

<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 forward and backward 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.

The rotation axis around which the seat 1 rotates is the center line of the rotation mechanism 40, and in this embodiment, it has no physical entity. As shown in Figure 26, the rotation mechanism 40 is equipped with an electric motor 41, which serves as a power source. A reducer is attached to the electric motor 41, and the drive gear on its output shaft is rotatably meshed with a sprocket 42 centered on a rotation axis provided on the underframe 30. The rotation mechanism 40 can also be used to rotate the seat manually.

<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, and therefore the movable base 20 is also inevitably prevented from moving forward or backward relative to the base 11.

As shown in Figure 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. There are a total of three locking holes 62a, 62b, and 62c provided on one long side of the approximately rectangular underframe 30 that runs along the back of the seat, and on both short sides that run along both sides of the seat.

As shown in Figure 24, the lock pin 61 is incorporated into the unit 60a, which is fixed near the rear end of the upper surface of the base 11. The lock pin 61 can extend and retract 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 disengages from the locking holes 62a, 62b, and 62c.

When the seat 1 is converted into the long position, one cross position, or reverse cross position, the lock pin 61 fits into the matching locking holes 62a, 62b, and 62c on the underframe 30, preventing the seat 1 from rotating. In other words, when the seat 1 is in the long position, the lock pin 61 fits into the locking hole 62a on one long side of the underframe 30. 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. In the reverse cross position, the lock pin 61 fits into the locking hole 62c on the other short side of the underframe 30.

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

The lock pin 61 is normally maintained in the locked position by the biasing force of a spring member, but when the link 60b is pulled by the rotation control cable 130 (described below) or the like, it retracts into the unlocked position against the biasing force of the spring member. The input end of the rotation control cable 130 extends to the rotation control unit 90 provided on the footrest 11 side. As described below, operation of the rotation control unit 90 pulls the rotation control cable 130 (see Figure 26), releasing the restriction on rotation of the seat 1 imposed by the rotation lock mechanism 60.

Meanwhile, 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 by switching the clutch, it is possible to switch between rotating the seat 1 using the rotation mechanism 40 and 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 explanation will be omitted.

In this embodiment, the rotation lock mechanism 60 is configured so that 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 using the rotation operation unit 90, but can only be released by electric rotation operation using the electric motor 41. The electric rotation operation here is performed by the train crew or station staff, and the manual rotation operation is mainly performed by passengers.

<Rotation operation unit 90>
As shown in Figure 1, the seat 1 is provided with a rotation operation unit 90. The rotation operation unit 90 is used to release the restriction imposed by the lock pin 61 of the rotation lock mechanism 60. As shown in Figure 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 (see Figure 28(b)) hanging down from the front end side of the movable platform 20.

As shown in Figures 28 and 29, the rotary operation unit 90 includes a foot pedal 94 that is pivotally supported via a pivot 93 at the lower end of a support bracket 92 fixed to the front side of the housing 91. The tip end of the foot pedal 94 can pivot up and down around the pivot 93, on which the base end is pivoted.

The foot pedal 94 swings between a use position (see Figure 28) in which the tip protrudes forward from the housing 91, and a storage position (see Figure 29) in which the tip retracts upward. The foot pedal 94 is normally biased to the use position in which 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 provided by the rotation lock mechanism 60. However, when the foot pedal 94 is in the storage position, it cannot be released from the restraint provided by the rotation lock mechanism 60.

The input end of the rotation control cable 130, which extends to the rotation lock mechanism 60, is connected to the base end of the foot pedal 94 via a bracket or the like. When the foot pedal 94 is pressed downward in the use position, the rotation control cable 130 is pulled, causing the lock pin 61 (see Figure 24) of the rotation lock mechanism 60 to retract downward, thereby releasing the locked state of the rotation lock mechanism 60.

Furthermore, 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 extending from the table lock mechanism 80 is connected to the engaged portion 97 via a bracket. When the engaged portion 97 engages with the engaging portion 99 (described below), the table lock cable 110 is pulled, causing the locking member 81 of the table lock mechanism 80 to swing and lock the table 70 in the stored state.

<Rotational Operation Prevention Mechanism 98>
26 and 27, the rotation operation unit 90 is provided with a rotation operation preventing mechanism 98 that prevents the release operation of the restraint by the rotation operation unit 90. The rotation operation preventing mechanism 98 prevents the operation of the foot pedal 94 when the seat 1 is in the long position (specific position). As shown in Figures 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.

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. Meanwhile, the engaged portion 97 is pin-shaped and located eccentrically from the pivot 93 at the base end of the foot pedal 94, as described above. The engaged portion 97 is designed to engage with the engaging portion 99 when the seat 1 is in the long position (specific position). When the engaged portion 97 engages with the engaging portion 99, the foot pedal 94 is swung to the storage position (see Figure 29) against the biasing force of the spring member 95, disabling the release operation of the rotation operating unit 90. At the same time, use of the table 70 is restricted, as described above.

<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 when the seat 1 is converted into the long state, one-cross state, or reverse-cross state so that the seat 1 does not interfere with the wall W. The interlocking mechanism is usually provided on the base 11 and the movable base 20.

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 platform 20, moving the movable platform 20 together with the frame 30 in a linear direction toward or away from the wall W. While there are no particular limitations on the type of interlocking mechanism, specific examples include the inventions described in Patent Publication No. 6,549,634 and Patent Publication No. 6,932,469, both of which have been proposed by the present applicant.

<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.

As shown in Figures 17 to 19, the reclining lock mechanism 100 comprises a base housing 101, 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 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" in the present invention, and the claw portion 126 at the lower end of the lock lever 123 corresponds to the "restricted portion" in the present invention.

The 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 into both side ends of the housing 101, aligned parallel to one another. The table lock cable 110 is inserted into the lower side of the housing 101, extending in both directions, and the reclining operation cable 120 is inserted into the upper side of the housing 101, extending in both directions.

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 the present invention, and the table lock output cable 112 corresponds to the "output cable" of the present invention.

A guide portion 102 is provided on the bottom side of the housing 101, supporting the 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 Figure 19, the end of the 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, the end of the 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.

The table lock input cable 111, together with the connecting shaft 113 and bracket 114, is biased by the auxiliary spring member 116 in a direction that causes the table lock output cable 112 to return to the table lock mechanism 80 side. Furthermore, as mentioned above, the table lock output cable 112 is biased by the spring member 85 in the table lock mechanism 80 in a direction that does not restrict the use of the table 70. Here, the auxiliary spring member 116 supplements the biasing force of the spring member 85.

The reclining operation cable 120 is divided into a reclining operation input cable 121, whose input side extends toward the reclining operation unit 55, and a reclining operation output cable 122, whose output side extends toward the reclining mechanism 50. The opposing ends of the reclining operation input cable 121 and the reclining operation output cable 122 are connected to each other via a lock lever 123 within the housing 101. The reclining operation input cable 121 corresponds to the "second input cable" in this invention, and the reclining operation output cable 122 corresponds to the "second output cable" in this invention.

As shown in Figure 18, the lock lever 123 is formed in the shape of a hook as shown, and is provided on opposite sides of its upper portion with a retaining groove 124 for retaining the end of the reclining operation input cable 121 and a retaining groove 125 for retaining the end of the reclining operation output cable 122. Each retaining groove 124, 125 is formed with a shape or angle that prevents the retaining pins at the ends of the cables 121, 122 from slipping out in the pulling direction. The lock lever 123 is also pivotally supported on the housing 101 via a pivot 127 so that it can swing in both directions.

The lower portion of the lock lever 123, which serves as the swing end, has a groove through which the table lock input cable 111 passes, 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 to the left in the figure, allowing the seat to be reclined.

On the other hand, when the seat 1 is in the long position, as shown in Figures 21 and 22, the entire table lock cable 110 is pulled to the right in the figure against the biasing force of the spring member 85 and 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 figure by operating the reclining operation unit 55, and as a result, the reclining operation cannot be performed. In other words, when the seat 1 is in the long position, the bracket 114 engages with the claw portion 126, restricting the movement of the reclining operation cable 120.

<Function of the seat device 10>
Below, the operation of the seat device 10 according to this embodiment will be explained in order, focusing on the restriction on use of the table 70 by the operation of the table lock mechanism 80, the restriction on the 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.

<<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 position, the engaged portion 97 on the movable platform 20 side is separated from the engaging portion 99 on the foot platform 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.

At this time, in the table lock mechanism 80, as shown in Figure 7, the front end of the locking member 81 is pulled upward by the biasing force of the spring member 85, and conversely, the locking portion 83 on the rear end moves downward, disengaging from the notch 71c of the table tray 71. Therefore, after opening the armrest 5 as shown in Figure 2, the table 70 can be removed from the sleeve body 4 and used as shown in Figure 3.

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 occupant. 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.

On the other hand, as shown in Figure 27, when the seat 1 is converted to the long position, the engaged portion 97 on the movable platform 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 seat 1 is converted to the long position by the operation described below, for example, during peak times such as rush hour.

When the table lock cable 110 is pulled as the engaging portion 97 rotates (displaces), the link portion 84 of the locking member 81 in the table locking mechanism 80 is pulled against the biasing force of the spring member 85, causing it to swing clockwise around the pivot 82, as shown in Figure 6. This causes the locking portion 83 of the locking member 81 to directly engage 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 getting on and off.

<<Operation of 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 position, 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.

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 reclining 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 side cable 111 and the table lock output side cable 112 has moved to the left end of the guide portion 102 in the housing 101 due to the biasing force of the spring member 85 and auxiliary spring member 116 mentioned above.

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

On the other hand, when the seat 1 is converted to the long position, as shown in Figures 20 to 22, the table lock cable 110 is pulled to the right in the figure against the biasing forces of the spring member 85 and auxiliary spring member 116 in conjunction 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.

This restricts the reclining operation cable 120 from moving in the operating direction, which is to the left 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 occupant is also reliably prevented from reclining the backrest 3, preventing the backrest 3 from accidentally tilting and interfering with the wall W.

<<Converting the state of seat 1>>
Next, the change in the state of the seat 1 will be described with reference to FIG.
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 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.

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 base 11, which is the fixed side of the seat 1, so not only is the seat 1 unable to rotate, but it is also unable to slide.

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

As a result, when the seat 1 is in the extended position, the foot pedal 94 not only displaces to a stowed position where it cannot be operated, but is also firmly held in the stowed position due to 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 impossible. With this simple configuration, it is possible to reliably prevent the occupant from rotating the seat 1 in the extended position.

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 rotation restriction 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 mentioned above, but is performed electrically using the power of the electric motor 41.

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

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.

When the seat 1 is in the cross position, the rotation operation prevention mechanism 98 releases the rotation operation unit 90 from its inoperable state. 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 does not engage with the engaging portion 99 on the foot platform 11, and is separated. Therefore, the foot pedal 94 is pushed forward by the biasing force of the spring member 95 into its use position.

At this time, the occupant of 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, causing the lock pin 61 (see Figure 24) to retract downward, releasing the locked state of the rotation lock mechanism 60. This allows the occupant to manually rotate the seat 1.

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 continue to rotate in the opposite direction without moving forward or backward.

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, once again preventing rotation of the underframe 30. 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. 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, simply 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 described above.

<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 a problem.

To achieve this goal, the 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 to prevent the table tray stored inside the sleeve body from being removed by locking the armrest that opens and closes the upper end opening of the sleeve body.

However, this type of seating device presents the following new problem. In order to lock the armrest, a locking mechanism must be installed inside the upper end of the sleeve body. As a result, there is less space available for arranging other components at the upper end of the sleeve body, so for example, a lever-type mechanism with a large operating stroke (pulling distance) cannot be installed as a reclining operation unit, and seating is limited to a button-type mechanism with a small operating stroke.

In addition, due to the structure that locks the front end of the armrest, the armrest opens vertically, which means the armrest has a large opening and closing stroke, making operation inconvenient. Furthermore, when pulling the table out from inside the sleeve body, the table needed to be compact to avoid interference with the open armrest, so the table had to be designed with a bi-folding structure. Further improvements were needed to solve these new issues with the seat device.

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 at 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 the locking part 83 directly engages with the table 70 itself to restrain it in the stored state when the seat 1 is converted into a specific state.

In this type of seating device 10, the seat 1 can be converted into a long state in which it is positioned along the wall W, or a cross state in which it is perpendicular to the wall W. During peak times such as rush hour, the seat is normally operated in the long state to provide more space for passengers to stand. In this long state, unfolding the table 70 of the seat 1 could potentially hinder passengers getting on and off the train in a crowded vehicle.

In this seating device 10, when the seat 1 is in this specific position (long position), the table lock mechanism 80 can restrain the table 70 in a stored position, restricting 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 position of the seat 1 can be changed. Furthermore, by not restricting the use of the table 70 when the seat 1 is in a position other than the specific position (long position) (cross position), convenience when sitting can be improved.

In particular, the table locking mechanism 80 has a locking unit 83 that can be engaged and disengaged with the table 70 when the table 70 is in the stowed position, and when the seat 1 is converted to a specific position (long position), the locking unit 83 directly engages with the table 70 itself, restraining it in the stowed position. Because the locking unit 83 thus directly restrains the table 70, the placement of the table locking mechanism 80 is not limited to the upper end of the interior of the sleeve body 4, as opposed to, for example, indirectly restraining the table 70 by locking the armrest 5 that opens and closes the sleeve body 4.

As shown in Figure 6, the table lock mechanism 80 can be positioned at the lower end of the sleeve body 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 body 4. For example, the reclining operation unit 55 can be configured as a lever-type unit with a large operating stroke, rather than a button-type unit with a small operating stroke. Such a lever-type reclining operation unit 55 allows for a large pull, making reclining adjustment easier and improving ease of operation for the seat occupant.

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.

With this configuration, the table 70 can be restrained in the stored state by the table locking mechanism 80 with a simple configuration and without using electric power, due to the mechanical engagement between the engaging portion 99 and the engaged portion 97. Here, the displacement of the engaged portion 97 is transmitted to the table locking mechanism 80 via the transmission means 110, so the engaging portion 99, engaged portion 97, and table locking mechanism 80 can be freely laid out in suitable locations, even if they are separated from each other.

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 table 70 being farther away from the vertical outer surface of the sleeve body 4 as it approaches the upper end.

In this way, the table 70 in this seating device 10 can be used as an in-arm table that can be stored in the sleeve body 4 on the side of the seat 1. Here, the armrest 5 covering the inside of the sleeve body 4 can be opened and closed in a compact horizontal trajectory, rather than a vertical opening with a large opening and closing stroke as occurs when the armrest 5 is locked. This not only improves operability, but also avoids interference with the table tray 71.

Furthermore, by positioning the table 70 (table tray 71) in an inclined position when stored inside the sleeve body 4, the dimension from top to bottom when stored, 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 vertically. This means that the table tray 71 can be formed as a single piece, rather than having a two-fold structure as in the past, and handling is also improved.

Furthermore, as shown in Figure 9, if the inner surface 4b of the sleeve body 4 is shaped so that it approaches the vertical outer surface 4a from its top to bottom, 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 Figures 9 and 2, the inner surface 4b of the sleeve body 4 hangs down parallel to the outer surface 4a at the top, but is recessed halfway down so that it approaches the outer surface 4a, ensuring as much space as possible for the placement of both ends of the seat 2.

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.

With this configuration, when the seat 1 is in a specific position (long position), 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 position (long position), it is possible to prevent the backrest 3 from tilting due to the occupant's reclining operation and interfering with the wall W. Furthermore, when the seat 1 is in a position other than the specific position (long position) (cross position), it is possible to tilt the backrest 3, improving sitting comfort.

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.

With this configuration, when the seat 1 is in a specific position (long position), the reclining operation unit 55, which operates the reclining mechanism 50, is restricted from operation by the reclining lock mechanism 100. This prevents the occupant from reclining at all, making it clear to the occupant that the backrest 3 cannot be tilted. Furthermore, because the reclining lock mechanism 100 is located midway between the transmission means 110 and the second transmission means 120, it can be freely positioned as needed depending on the wiring of these means.

Furthermore, 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 from operation 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 from tilting 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.

In addition, in the present invention, the transmission means 110 includes an input side cable 111 connected to the engaged portion 97 side and an output side 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.

This configuration makes it possible to easily retrofit the reclining lock mechanism 100 between the transmission means 110 and the second transmission means 120. Furthermore, the reclining lock mechanism 100 can be easily handled as a unit, and its installation is also simple.

The present invention also provides a seat that includes 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 linked together to change the state of the seat 1 as follows:
A long state in which the back of seat 1 is approximately 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.

This makes it possible to apply the seat device 10 directly to well-known rotating seats installed in railway vehicles, as described in the above-mentioned embodiment.

Furthermore, the present invention provides a seat 1 having a fixed side, which is a footrest 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 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 .

With this seat device 10, it is possible to realize a layout in which the engaging portion 99 and the engaged portion 97 are optimally matched to the components within the minimum necessary components of the seat device 10.

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

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. While the seat 1 has been described as a two-seater, it may also be a three-seater or a single-seater. Furthermore, the state of the seat 1 can be changed in any way, not limited to the long state, one-cross state, or reverse-cross state.

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, and ships, as well as for theater, home, and office chairs.

DESCRIPTION OF SYMBOLS 10...Seat device 11...Foot rest 14...Slide mechanism 20...Moving base 30...Frame 40...Rotation mechanism 50...Reclining mechanism 55...Reclining operation unit 60...Rotation lock mechanism 70...Table 80...Table lock mechanism 81...Locking member 82...Pivot 83...Lock unit 90...Rotation operation unit 94...Foot pedal 97...Engaged unit 98...Rotation operation prevention mechanism 99...Engaging unit 100...Reclining lock mechanism 110...Table lock cable 114...Bracket (restriction unit)
120... Reclining operation cable 123... Lock lever 126... Claw portion (restricted portion)
130...Rotation control cable

Claims (8)

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. 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. 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. 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. 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. 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. 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. 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.