Seat device

Abstract

A seat device is provided that can reliably restrict a tilting operation when the back of the seat is in an extended state along a wall. In a seat device (10) capable of changing the state of a seat (1), a tilting mechanism (50) is provided that can tilt a backrest (3) of the seat (1). When the seat (1) is in the extended state, the tilting operation of the backrest (3) by the tilting mechanism (50) cannot be performed.

Description

Technical Field

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

[0002] Conventionally, for example, seats installed in railway vehicles are of the type that are long in both directions and accommodate multiple people, and are generally installed along the walls of passenger compartments. Among these seats, there are known swivel seats that can rotate about a rotation axis at the center of the seat, changing their orientation between an extended position with the seat back parallel to the wall and a cross position with the seat back perpendicular to the wall.

[0003] In this type of rotating seat, a seat device has been proposed that includes a sliding mechanism in addition to a seat rotation mechanism, and a transmission mechanism that links these mechanisms so that the seat's trajectory (rotation radius) does not interfere with the wall when the seat rotates from an extended position along the wall to a crossed position. For example, see Patent Document 1.

[0004] Specifically, in order to maximize the width of the aisle between the seats on both sides of the passenger compartment and create a comfortable space, the seat's rotation axis is positioned near the wall when extended. Meanwhile, the seat's rotation axis is slid toward the aisle so that the seat does not interfere with the wall when crossed. Therefore, to prevent interference with the wall in the extended position, the swivel seat cannot tilt its backrest, lacking a reclining mechanism that provides a comfortable ride.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Patent No. 3431772 Summary of the Invention

[0008] However, existing rotating mechanisms lack a tilting mechanism, preventing the backrests from tilting and widening the aisle between seats, resulting in a narrower aisle than typical commuter trains. In particular, even when the backrests are not intersecting the wall, they cannot be tilted, impairing the ride quality.

[0009] The present invention is a solution proposed with focus on the problems of the prior art as mentioned above, and its purpose is to provide a seat device that can perform a backrest tilt operation even in a seat that is linked to rotation and sliding, expand the aisle width, and obtain a comfortable riding feeling. When the tilt operation is in a specific state (extended state) where it becomes a problem, the tilt operation can be reliably limited.

[0010] In order to achieve the above-mentioned object, one solution of the present invention is a seat device capable of changing the state of the seat, characterized in that:

[0011] Equipped with a tilt mechanism that can tilt the seat back.

[0012] When the seat is in a specific state, the backrest cannot be tilted by the reclining mechanism.

[0013] According to the seat device of the present invention, the state of the seat can be changed, the backrest can be tilted, the aisle width can be expanded, and a comfortable riding feeling can be obtained. When the seat is in a specific state, the tilting operation can be reliably restricted. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The diagram shows a crossed state of a seat device according to an embodiment of the present invention. (a) is a perspective view of the entire seat, (b) is an enlarged perspective view of a reclining operation portion, and (c) is an enlarged perspective view of a rotating operation portion.

[0015] Figure 2 The seat device according to the embodiment of the present invention is shown in an extended state. (a) is a perspective view of the entire seat, (b) is an enlarged perspective view of the reclining operation portion, and (c) is an enlarged perspective view of the rotating operation portion.

[0016] Figure 3 It is a perspective view showing the internal structure of the seat device according to the embodiment of the present invention.

[0017] Figure 4 This is a front view showing a crossed state of the seat device according to the embodiment of the present invention.

[0018] Figure 5 It is a side view showing the seat device in the extended state according to the embodiment of the present invention.

[0019] Figure 6 It is a perspective view showing a base, a moving platform, and a bottom frame of a seat device according to an embodiment of the present invention.

[0020] Figure 7 It is a side view showing the initial position of the reclining operation portion of the seat device according to the embodiment of the present invention.

[0021] Figure 8 It is a side view showing the operation position of the reclining operation portion of the seat device according to the embodiment of the present invention.

[0022] Figure 9 It is a side view showing the initial positions of the components of the reclining operation portion of the seat device according to the embodiment of the present invention.

[0023] Figure 10 This is a side view showing a state in which each member of the reclining operation portion of the seat device according to the embodiment of the present invention is restrained in its initial position and cannot be operated.

[0024] Figure 11 This is a side view showing a state in which the rotation operation portion of the seat device according to the embodiment of the present invention is not restrained and rendered inoperable by the rotation operation preventing mechanism.

[0025] Figure 12 This is a side view showing a state in which a rotation operation portion of the seat device according to the embodiment of the present invention is restrained by a rotation operation preventing mechanism and is rendered inoperable.

[0026] Figure 13 It is a perspective view showing a rotation locking mechanism of a seat device according to an embodiment of the present invention.

[0027] Figure 14 This is a perspective view showing a state in which the rotation lock mechanism of the seat device according to the embodiment of the present invention is viewed from the bottom.

[0028] Figure 15 These are explanatory diagrams showing a process of converting a seat into an extended state, a negatively crossed state, and a reversely crossed state in the seat device according to the embodiment of the present invention. DETAILED DESCRIPTION

[0029] Hereinafter, representative embodiments of the present invention will be described with reference to the accompanying drawings.

[0030] Figures 1 to 15 This shows one embodiment of the present invention.

[0031] The seat device 10 of this embodiment can change the state of the seat 1. Here, the state of the seat 1 is not only the rotation direction of the seat 1, but also includes the concept of changes in the front and rear positions of the seat 1. In addition, the type of seat 1 is not particularly limited. The following description takes the case of a two-seater chair installed in the passenger compartment of a railway vehicle as an example. In addition, in each figure, the difference in some shapes of the same part is only a design change (for example, Figure 1 as well as Figure 6 The shape of the bottom frame 30 is different, etc.).

[0032] <Overview of Seat Device 10>

[0033] like Figure 6 As shown, the seat device 10 includes: a base 11 fixed to the floor surface; a movable platform 20 supported on the base 11 so as to be able to move forward and backward; and a bottom frame 30 of the seat 1 supported on the movable platform 20 so as to be able to rotate in the forward and reverse directions. Here, the base 11 is the "fixed side of the seat 1", and the movable platform 20 and the bottom frame 30 are the "movable side of the seat 1". In addition, the seat device 10 is arranged on the floor surface next to the wall (window) in the passenger compartment of the railway vehicle. Figure 6The "A" in FIG. 1 is a portion of the wall parallel to the traveling direction of the railway vehicle.

[0034] In the seat device 10, the bottom frame 30 of the seat 1 is supported on the movable platform 20 so as to be rotatable about a rotation axis via a rotation mechanism 40. The movable platform 20 is supported on the base 11 so as to be able to advance and retreat together with the rotation mechanism 40 via a sliding mechanism 14. Although not shown in the figure, the seat device 10 includes a linkage mechanism for linking the forward and backward movement of the seat 1 by the sliding mechanism 14 with the rotation of the seat 1 by the rotation mechanism 40.

[0035] <About Seat 1>

[0036] like Figure 1 As shown, the seat 1 is provided with two seats 2 and backrests 3 arranged side by side on both sides, for example, as a chair for two people. A pair of sleeves 4 are provided on both sides of the seat 1 to cover the seat 2 from the side. The upper end of each sleeve 4 becomes an armrest 5 extending approximately horizontally forward and backward. The lower end of the backrest 3 is tilted via a tilt mechanism 50 (see Figure 3 ) is supported on the rear end side of the seat 2 in a tiltable manner.

[0037] <Tilt mechanism 50>

[0038] like Figure 3 As shown, the reclining mechanism 50 supports the backrest 3 so that it can tilt within a predetermined angular range relative to the seat 2. The reclining mechanism 50 includes a damper 51, such as a gas spring. The damper 51 is configured such that a piston rod 53 is inserted into a cylinder body 52 so that it can extend and retract, and is arranged on the base frame 30 parallel to the front-to-back direction. The damper 51 is biased in the direction in which the piston rod 53 is retracted into the cylinder body 52, but can be fixed in a position where the piston rod 53 protrudes by any amount.

[0039] The rear end of the cylinder body 52 is connected to the lower end of the frame 3a inside the backrest 3 in a push-pull manner. Meanwhile, the front end of the rod 53, which extends from the front end of the cylinder body 52, is connected to a suitable location on the front side of the base frame 30. This damper 51 allows the backrest 3 to be maintained at any tilting angle. Specifically, when the damper 51 is locked, the piston rod 53 is fixed so as to protrude a predetermined amount from the cylinder body 52, allowing the backrest 3 to be maintained at any tilting angle.

[0040] When the damper 51 is unlocked, the backrest 3 returns to its most upright initial position due to the force of the piston rod 53 being retracted into the cylinder body 52. ​​In this unlocked state, the seated user pushes the backrest 3 backward against the restoring force of the damper 51, thereby adjusting the backrest 3 to any desired tilt angle.

[0041] The locking mechanism of the damper 51 is a conventional locking mechanism, so detailed description is omitted. However, a release button 54 for releasing the lock state is provided next to the piston rod 53. A tilt operation unit 100 for releasing the lock state by pressing the release button 54 is provided at the front end of the armrest 5. The tilt operation unit 100 corresponds to the "operating unit" of the present invention.

[0042] <Tilt Operation Unit 100>

[0043] like Figure 1 As shown, the reclining operation unit 100 is formed by assembling various components into a single housing 101 and is assembled inside the front end of the armrest 5. The reclining operation unit 100 is used to perform an operation (reclining operation) of tilting the backrest 3 by the reclining mechanism 50.

[0044] like Figure 9 、 Figure 10 As shown, the rotary operation unit 100 includes an operation lever 104, which is supported by a support bracket 102 fixed to the housing 101 via a pivot 103 so as to be swingable. The upper end of the operation lever 104 is swung around the pivot 103 supported by the shaft, and the lower end is swung forward and backward. The operation lever 104 is stored in the initial position of the housing 101 at the lower end (see FIG. Figure 7 ), and the operating position where the lower end side is pulled forward (refer to Figure 8 )swing.

[0045] A receiving member 105 of a tilt lock mechanism 110 (described below) is fixed to the inner side of the operating lever 104. One end of a tilt cable 106, which extends to the release button 54, is connected to the receiving member 105. Pulling the operating lever 104 forward to the operating position pulls the link on the release button 54 side via the tilt cable 106, pressing the release button 54 and releasing the damper 51 from its locked state. Furthermore, the operating lever 104 is normally biased by the tilt cable 106 to its initial, retracted position.

[0046] <Tilt Operation Lock Mechanism 110>

[0047] Furthermore, a reclining lock mechanism 110 is attached to the reclining operation portion 100, which prevents the reclining operation portion 100 from being operated. When the seat 1 is in the extended state (a specific state) described later, the reclining lock mechanism 110 prevents the reclining operation portion 100 from being operated. The reclining lock mechanism 110 corresponds to the "locking mechanism" of the present invention.

[0048] like Figure 9As shown, the tilt lock mechanism 110 includes a generally L-shaped link 112 supported on the housing 101 via a pivot 111 so as to be swingable in the forward and backward directions. A lock pin 113 is swingably supported upward on one end of the link 112 relative to the pivot 111. The lock pin 113 is disposed so that its upper end extends through a guide hole 102a in the support bracket 102 and protrudes and retracts vertically in a vertical position as the link 112 swings.

[0049] The receiving member 105 located on the inner side of the operating rod 104 has a locking hole 105a provided on the lower side opposite to the locking pin 113 when the operating rod 104 is in the initial position, into which the front end of the locking pin 113 can be inserted and retracted. Figure 9 The locking pin 113 is normally disengaged from the locking hole 105 a of the receiving member 105 .

[0050] One end of a tilt lock cable 115 is connected to the link 112, on the other side of the pivot 111, via a connector 116. The other end of the tilt lock cable 115 extends to the rotational operation unit 200, which will be described later. When the seat 1 is in a specific state (an extended state, which will be described later), the tilt lock cable 115 is pulled away from the rotational operation unit 200, thereby restricting the tilt operation unit 100 from being operated.

[0051] That is, the tilt lock cable 115 causes the link 112 to overcome the force of the spring member 114 and move to the Figure 9 、 Figure 10 The tilt lock cable 115 is equivalent to the "transmission member" of the present invention.

[0052] like Figure 7 、 Figure 8 As shown, the components of the tilt lock mechanism 110, which is mounted on the housing 101, are covered by a hood-like cover 101a. A circular arc-shaped guide groove 101b centered around the pivot 111 of the connecting rod 112 is formed in the housing 101 and the cover 101a. A pivot 117, which pivotally supports the connector 116 at the other end of the connecting rod 112, is movably engaged with the guide groove 101b, thereby limiting the swing range of the connecting rod 112 centered around the pivot 111.

[0053] <About the orientation of seat 1>

[0054] The seat device 10 can transform the state of the seat 1 into an extended state with the seat back substantially parallel to the wall A (see FIG. Figure 6 、 Figure 2 ), and the intersection state where the back of the seat is substantially perpendicular to the wall A (refer to Figure 1 Here, the cross state has - cross state (refer to Figure 1 ) and the reverse cross state which is 180 degrees opposite to the - cross state. Figure 15 As shown, if the seat 1 is in the extended state as the home position and the rotation angle is 0°, the rotation angle in the -cross state is 90°, and the rotation angle in the reverse-cross state is -90°. Furthermore, the back surface of the seat is synonymous with the back surface of the backrest 3. Hereinafter, the cross state and reverse-cross state will be collectively referred to as simply the cross state.

[0055] <Base 11>

[0056] like Figure 6 As shown, the base 11 is fixed to the floor surface next to the wall A in the passenger compartment. The base 11 is constructed by combining frame materials in a long platform shape in a direction approximately perpendicular to the wall A (front-back direction). The top surface of the base 11 is generally horizontal and is surrounded by two side ends 12, 12 forming the long sides and a rear end forming the short side forming the rear side (toward the wall A). However, the front side (the passage side) is open.

[0057] The base 11 is arranged so that its rear end is approximately parallel to the wall A and its side ends 12, 12 face the passage side approximately perpendicular to the wall A. In addition, on the upper surface side of the base 11, in addition to the sliding mechanism 14 described later, related components such as stoppers that limit the advance and retreat range and rotation direction of the bottom frame 30 are also provided.

[0058] <Sliding mechanism 14>

[0059] like Figure 6 As shown, a movable stage 20 is mounted on the upper surface of the base 11 via a sliding mechanism 14 so as to be able to move forward and backward in a direction substantially perpendicular to the wall A. The sliding mechanism 14 includes a pair of guide rails 14a, 14a provided inside the two side ends 12, 12 of the base 11. The pair of guide rails 14a, 14a are arranged parallel to each other along the two long sides of the upper surface of the base 11, and the two side portions 21, 21 of the movable stage 20 described later can be slidably fitted into the inner sides of each guide rail 14a.

[0060] <Mobile Station 20>

[0061] like Figure 6As shown, the movable platform 20 is disposed approximately horizontally on the upper surface of the base 11 and is constructed by combining frame materials in a rectangular frame-like configuration. The two side ends 21, 21 forming the long sides of the movable platform 20 are slidably engaged within the pair of guide rails 14a, 14a described above. Thus, the movable platform 20 can slide forward or backward in a direction approximately perpendicular to the wall A. A rotating mechanism 40 is provided approximately in the center of the movable platform 20 to rotate the seat 1 about its rotation axis.

[0062] <Rotation mechanism 40>

[0063] The rotating mechanism 40 supports the base frame 30 of the seat 1 on the movable platform 20 so that it can rotate in both forward and reverse directions on a substantially horizontal plane. The rotating mechanism 40 is configured as a unit comprising, for example, a pair of inner and outer annular rotating disks, each rotatably coupled together with a bearing interposed therebetween. In this rotating mechanism 40, the outer rotating disk is fixed to the movable platform 20, while the inner rotating disk is fixed to the base frame 30.

[0064] The rotation axis that becomes the rotation center of the seat 1 is the center line of the rotation mechanism 40, and is not a structure that follows the actual physical situation in this embodiment. Figure 4 As shown, the rotating mechanism 40 includes a motor 41 as a power source. A speed reducer is attached to the motor 41, and a drive gear on its output shaft rotatably meshes with a sprocket 42 centered around a rotating shaft provided on the bottom frame 30. Furthermore, the rotating mechanism 40 can also be manually rotated to rotate the seat.

[0065] <Bottom frame 30>

[0066] like Figure 6 As shown, the bottom frame 30 is mounted on the chair 1 and supports the rotating mechanism 40 on the moving platform 20. The bottom frame 30 is made of, for example, a metal plate that conforms to the bottom surface of the seat 2. A sprocket 42 is integrally provided on the lower surface of the bottom frame 30, and the sprocket 42 is rotatably engaged with the drive gear of the motor 41.

[0067] <Linkage Mechanism>

[0068] The seat device 10 also includes a linkage mechanism (not shown) that links the rotation and forward and backward movement of the seat 1 so that the seat 1 does not interfere with the wall A when the seat 1 is switched between the extended state, the negative cross state, and the reverse cross state.

[0069] When the seat 1 rotates together with the base frame 30, the linkage mechanism converts the rotation of the base frame 30 into linear motion and transmits it to the movable platform 20, thereby causing the movable platform 20 and the base frame 30 to move forward and backward in a linear direction, approaching or moving away from the wall A. The type of such linkage mechanism is not particularly limited, but specifically, it is preferable to utilize, for example, the invention described in Japanese Patent Application No. 2018-187971, which has been filed by the present applicant, or the invention proposed in Japanese Patent Application No. 2019-239066, which has not been published.

[0070] <Rotation Locking Mechanism 60>

[0071] The seat device 10 includes a rotation lock mechanism 60 that prevents the bottom frame 30 (seat) from rotating in the extended, negative, and reversed positions. The rotation lock mechanism 60 locks the bottom frame 30 so that it cannot rotate relative to the base 11, and therefore, inevitably, the movable platform 20 is also prevented from moving forward or backward relative to the base 11.

[0072] like Figure 6 As shown, the rotation lock mechanism 60 includes a locking pin 61 extending from the base 11 side to the bottom frame 30, allowing it to be moved up and down; and locking holes 62a, 62b, and 62c provided in the bottom frame 30 for engaging and disengaging the locking pin 61. Three locking holes 62a, 62b, and 62c are provided in the substantially rectangular bottom frame 30, one along one long side of the seat back and one along each of the two short sides of the seat.

[0073] The locking pin 61 is assembled into the unit 60a, which is fixed to the rear end of the upper surface side of the base 11. The locking pin 61 can be extended and retracted upward from the upper surface side of the base 11, and can be operated between a locked position in which it protrudes upward and fits into the locking holes 62a, 62b, and 62c, and an unlocked position in which it retracts downward and is disengaged from the locking holes 62a, 62b, and 62c.

[0074] When the seat 1 is transformed into the extended, uncrossed, and reversed cross positions, the locking pin 61 engages with the corresponding locking holes 62a, 62b, and 62c on the bottom frame 30, thereby preventing the seat 1 from rotating. Specifically, in the extended position, the locking pin 61 engages with the locking hole 62a located on one long side of the bottom frame 30. Furthermore, in the uncrossed position, the locking pin 61 engages with the locking hole 62b located on one short side of the bottom frame 30. Furthermore, in the reversed cross position, the locking pin 61 engages with the locking hole 62c located on the other short side of the bottom frame 30.

[0075] like Figure 13 、 Figure 14As shown, the unit 60a in which the locking pin 61 is assembled is provided with a spring component (not shown) that causes the locking pin 61 to protrude upward and always urge it to the locked position, and a link 60b that causes the locking pin 61 to overcome the urging force of the spring component and sink to the unlocked position below.

[0076] The locking pin 61 is normally maintained in the locked position by the force of the spring member, but when the link 60b is pulled by the operating cables, it overcomes the force of the spring member and sinks to the unlocked position. Here, the other end side of the operating cable for manual operation extends to the rotating operating part 200 provided on the side of the base 11. Although it will be described later, the operating cable 206 (see Figure 11 ) is stretched, and the restraint of the rotation locking mechanism 60 is released.

[0077] Meanwhile, the power source for pulling the operating cable for electric operation also serves as the motor 41 of the rotating mechanism 40, for example. Specifically, the motor 41 is equipped with a clutch, and is configured so that, by switching the clutch, the seat can be rotated by the rotating mechanism 40, or unlocked by retracting the lock pin 61. The structure of the clutch in the motor 41 is general, and therefore a detailed description thereof will be omitted.

[0078] The rotation lock mechanism 60 of this embodiment is configured so that when the seat 1 is in the extended state, manual operation of the rotation operation unit 200 cannot release the restraint of the rotation lock mechanism 60, and can only be released by electric operation using the motor 41. Here, the electric operation is performed by the train crew or station staff, while the manual operation is mainly performed by the passengers.

[0079] <Rotational Operation Unit 200>

[0080] In addition, the rotation lock mechanism 60 is provided with a rotation operation portion 200 for performing a release operation based on the restraint of the lock pin 61. Figure 1 As shown, the rotary operation unit 200 is assembled into a unit by assembling various components in a housing 201 and fixed to a mounting portion 22 (see FIG. 2 ) hanging down toward the front end of the moving platform 20. Figure 6 ).

[0081] like Figure 1 (a) Figure 2 (a) Figure 11 、 Figure 12As shown, the rotary operation unit 200 includes a foot pedal 204, which is swingably supported via a pivot 203 at the lower end of a support bracket 202 fixed to the front side of the housing 201. The foot pedal 204 is capable of swinging forward and backward at its distal end, with the pivot 203, which pivotally supports its base end, as the center of swing. The foot pedal 204 corresponds to the "pedal" of the present invention.

[0082] The footrest 204 is in the use position where the front end side protrudes toward the front of the housing 201 (see Figure 11 ) and the storage position where the front side is pulled upward (refer to Figure 12 ) swings. The footrest 204 is normally biased by the spring member 205 in the forward-projecting use position. When the footrest 204 is in the use position, stepping on it allows the rotation lock mechanism 60 to be released. However, when the footrest 204 is in the storage position, the rotation lock mechanism 60 cannot be released. The spring member 205 corresponds to the "biasing member" of the present invention.

[0083] The other end of the operating cable 206 for manual operation is connected to the base end of the foot pedal 204 via a connector. The operating cable 206 extends to the rotation lock mechanism 60. When the foot pedal 204 is stepped on downward in the use position, the operating cable 206 is pulled to lock the pin 61 (see FIG. Figure 13 ) sinks downward, and the locked state of the rotation locking mechanism 60 is released.

[0084] Furthermore, a pin-shaped engaged portion 207 protruding in both directions is fixed to the base end of the footrest 204 at a position eccentric from the pivot 203. The other end of the tilt lock cable 115 extending from the tilt lock mechanism 110 is connected to the engaged portion 207 via a connector. The configuration is such that when the engaged portion 207 engages with an engaging portion 211 (described below), the tilt lock cable 115 is pulled, causing the lock pin 113 of the tilt lock mechanism 110 to protrude upward, thereby preventing the tilt operation unit 100 from being operated.

[0085] <Rotational Operation Preventing Mechanism 210>

[0086] Furthermore, a rotational operation preventing mechanism 210 is attached to the rotational operation unit 200. This rotational operation preventing mechanism 210 prevents the release operation of the restraint by the rotational operation unit 200. When the seat 1 is in the extended state, the rotational operation preventing mechanism 210 prevents the footrest 204 from being operated. The extended state herein corresponds to "the seat 1 being in a specific state" in the present invention.

[0087] like Figure 11 、 Figure 12As shown, the rotation operation preventing mechanism 210 includes an engaging portion 211 provided on the base 11, which is the fixed side of the seat 1, and an engaged portion 207 of the rotation operation portion 200, which is provided on the movable side of the seat 1. The engaging portion 211 is arranged at the front end of the lower surface side of the base 11 and is formed in a bracket shape that protrudes obliquely upward toward the front.

[0088] As described above, the engaged portion 207 is provided in a pin-shaped manner on the base end side of the footrest 204, at a position eccentric from the pivot 203. The engaged portion 207 is configured to precisely engage with the engaging portion 211 when the seat 1 is in the extended state (a specific state). When the engaged portion 207 engages with the engaging portion 211, the footrest 204 is swung toward the stowed position against the bias of the spring member 205, thereby preventing the release operation of the rotation operation unit 200. Simultaneously, the reclining operation unit 100 is restrained and rendered inoperable.

[0089] <Operation of Seat Device 10>

[0090] The following is based on Figure 15 , the action of changing the state of the seat 1 is described. First, as Figure 15 As shown in (a), when the bottom frame 30 (seat 1) is in the extended state, the rotation axis (rotation mechanism 40) of the bottom frame 30 is completely retracted (approached) toward the wall A. Here, the long side of the bottom frame 30 (the back of the seat) is approximately parallel to the wall A, and the rotation angle is 0°.

[0091] <<Restrictions on the Rotation Operation of Seat 1>>

[0092] When the seat 1 is in the extended state, the bottom frame 30 is restrained from rotating relative to the moving platform 20 by the rotation locking mechanism 60. Figure 6 As shown, the locking pin 61 of the rotation locking mechanism 60 is embedded in the locking hole 62a located on one long side of the bottom frame 30. Here, since the locking pin 61 protrudes from the base 11 as the fixed side of the seat 1, the seat 1 is not only unable to rotate, but also is restrained from moving forward or backward.

[0093] like Figure 2 As shown, when the seat 1 is in the extended state, the release operation in the rotation operation unit 200 cannot be performed by the rotation operation blocking mechanism 210. That is, in the extended state, the movable platform 20 retreats (approaches) to the wall A side, and the front end side of the movable platform 20 overlaps with the front end side of the base 11. According to this positional relationship, as shown in FIG. Figure 2 As shown in (c), the engaged portion 207 of the footrest 204 on the movable platform 20 engages with the engaging portion 211 on the base 11. The footrest 204 then swings toward the upright storage position against the biasing force of the spring member 205 and is restrained in the storage position.

[0094] Thus, when the seat 1 is in the extended state, the footrest 204 not only simply moves to the inoperable stowed position but is also securely held in the stowed position by the engagement between the engaging portion 211 and the engaged portion 207. Therefore, in the extended state, the rotation operation portion 200 cannot be released. This simple structure reliably prevents the seat 1 from being rotated by the occupant in the extended state.

[0095] <<Restrictions on the reclining operation of the backrest 3>>

[0096] Furthermore, when the seat 1 is in the extended state, the reclining operation of the reclining operation unit 100 is disabled by the reclining operation lock mechanism 110. Specifically, when the footrest 204 is swung upward by the engagement of the engaged portion 207 and the engaging portion 211, the reclining lock cable 115 connected to the engaged portion 207 is pulled, and the reclining operation unit 100 is restrained and rendered inoperable.

[0097] That is, Figure 10 As shown, if the tilt lock cable 115 is pulled, the link 112 overcomes the force of the spring member 114. Figure 10 In the embodiment, the connecting rod 112 is swung counterclockwise around the pivot 111. Then, the locking pin 113 at one end of the connecting rod 112 projects upward and is embedded in the locking hole 105a of the receiving component 105, which is integrated with the operating lever 104 at the initial position.

[0098] Thus, when the seat 1 is in the extended state, the reclining operation using the reclining operation portion 100 cannot be performed, and the backrest 3 cannot be tilted down by the reclining mechanism 50. This simple structure reliably prevents the seat occupant from tilting the backrest 3 in the extended state, thereby preventing the backrest 3 from accidentally tilting down and interfering with the wall A.

[0099] <<Transition from the extended state to the crossed state>>

[0100] like Figure 15 (a)~ Figure 15 As shown in (c), to transform the bottom frame 30 (seat 1) from the extended state to the cross state (rotation angle of 90°), it is first necessary to release the rotational restraint of the rotation lock mechanism 60. Here, the operation of disengaging the lock pin 61 from the locking hole 62a is not performed by operating the foot pedal 204 as described above, but is performed electrically using the power of the motor 41.

[0101] exist Figure 15 In the extended state shown in (a), after the restraint by the rotation locking mechanism 60 is released, Figure 15As shown in (b), if the bottom frame 30 is moved in the positive direction ( Figure 15 In the embodiment of the present invention, the base frame 30 is rotated in the counterclockwise direction by the interlocking mechanism. That is, the base frame 30 rotates while advancing to the passage side in the forward direction without interfering with the wall A.

[0102] like Figure 15 As shown in (c), if the bottom frame 30 reaches the cross state (rotation angle 90°), then Figure 6 In the embodiment, the lock pin 61 of the rotation lock mechanism 60 is fitted into the locking hole 62b located on one short side of the bottom frame 30. Thus, the bottom frame 30 (seat 1) is restrained so as not to rotate in the -cross state.

[0103] <<Releasing the Restriction of the Rotation Operation of Seat 1>>

[0104] When the seat 1 is in the crossed state, the inoperability restriction of the rotation operation portion 200 by the rotation operation preventing mechanism 210 is released. Figure 15 In the cross state shown in (c), the movable stage 20 is most advanced (away) relative to the wall A side, and the front end side of the movable stage 20 is configured to move forward from the front end side of the base 11. In this positional relationship, as shown in FIG. Figure 11 As shown, the engaged portion 207 of the footrest 204 of the moving platform 20 is not engaged but separated from the engaging portion 211 of the base 11. Therefore, the footrest 204 is in a forwardly protruding use position due to the biasing force of the spring member 205.

[0105] At this time, the seat occupant of the seat 1 can release the restraint by the rotation locking mechanism 60 by stepping on the footrest 204. Figure 11 When the foot pedal 204 is stepped on and swung, the operating cable 206 is pulled and the locking pin 61 (see Figure 13 ) is sunk downward, and the locked state of the rotation locking mechanism 60 is released. Thus, the seat occupant can rotate the seat 1 manually.

[0106] <<Releasing the Restriction of the Reclining Operation of the Backrest 3>>

[0107] In addition, when the seat 1 is in the crossed state, the inoperability restriction of the reclining operation portion 100 by the reclining operation locking mechanism 110 is also released. Figure 11 As shown, the engaged portion 207 of the footrest 204 on the movable platform 20 is not engaged with the engaging portion 211 on the base 11 but is separated. Therefore, the footrest 204 is in the forward-projecting use position due to the force of the spring member 205, and the tilt lock cable 115 is in an unstretched state.

[0108] Therefore, if Figure 9 As shown, in the reclining lock mechanism 110, the link 112 is held in a position where the locking pin 113 does not protrude upward due to the force of the spring member 114. Consequently, the locking pin 113 is prevented from being removed from the locking hole 105a of the receiving member 105 integral with the operating lever 104. The operating lever 104 is no longer constrained from being inoperable, allowing the reclining operation to be performed. Consequently, the reclining mechanism 50 allows the seat occupant to tilt the backrest 3 to any desired angle, providing a comfortable ride.

[0109] <<Transition from -cross state to reverse cross state>>

[0110] exist Figure 15 In the cross state shown in (c), after releasing the restraint of the rotation locking mechanism 60, if the bottom frame 30 is rotated in the opposite direction (in Figure 15 If the bottom frame 30 rotates clockwise (clockwise in the figure), the bottom frame 30 can be moved back or forward while rotating, for example, by omitting the linkage mechanism (not shown). Figure 15 As shown in (d), the bottom frame 30 is temporarily held at the position where it has advanced in parallel with the extended state, and then rotates in the reverse direction without advancing or retreating.

[0111] like Figure 15 As shown in (e), when the bottom frame 30 reaches the reverse cross state (rotation angle -90°), the locking pin 61 of the rotation locking mechanism 60 is embedded in the locking hole 62c on the other short side of the bottom frame 30, and the bottom frame 30 is restrained from rotating again. This conversion of the seat 1 from the -cross state to the reverse cross state is not limited to manual operation, but can also be performed by electric operation. In addition, in order to return the seat 1 from the reverse cross state to the -cross state, and from the -cross state to the original extended state, it is sufficient to perform the opposite actions of the conversion from the extended state to the -cross state and from the -cross state to the reverse cross state.

[0112] <Structure and Effects of the Present Invention>

[0113] While the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments. The present invention derived from the above-described embodiments will be described below.

[0114] First, the present invention is characterized in that the seat device 10 capable of changing the state of the seat 1 includes a reclining mechanism 50 capable of tilting the backrest 3 of the seat 1.

[0115] When the seat 1 is in a specific state, the reclining mechanism 50 cannot be used to tilt the backrest 3 .

[0116] In the present seat device 10, the seat 1 is positioned along the wall A to maximize the aisle width within the passenger compartment. Therefore, when the seat 1 is in the extended position, the backrest 3 approaches the wall A. However, when the seat 1 is in this specific position, the reclining mechanism 50 can reliably restrict the backrest 3 from tilting downward.

[0117] This prevents the backrest 3 from accidentally tilting down and interfering with the wall A. Conventional seats that link rotation and sliding cannot always include a reclining mechanism 50 to prevent interference with the wall A in the extended state. On the other hand, the present seat device 10 includes a reclining mechanism 50, which allows the backrest 3 to tilt down in the crossed state, thereby improving the riding comfort.

[0118] Furthermore, the present invention is characterized by comprising:

[0119] an operating unit 100 for performing an operation to tilt the backrest 3 via the reclining mechanism 50; and

[0120] The locking mechanism 110 restrains the operating portion 100 so that it cannot be operated.

[0121] When the seat 1 is in the specific state, the locking mechanism 110 restrains the operating portion 100 so as to be inoperable.

[0122] Thus, in the seat device 10, the operating portion 100 for operating the reclining mechanism 50 is restrained from being operated by the locking mechanism 110. Therefore, when the seat 1 is in the extended state, the reclining operation itself cannot be performed by the seat occupant, and the tilting of the backrest 3 can be restricted in a manner that the seat occupant can easily understand.

[0123] Furthermore, the present invention is characterized by comprising:

[0124] The engaging portion 211 is provided on the fixed side of the seat 1; and

[0125] The engaged portion 207 is provided on the movable side of the seat 1 and is displaceable by engaging with the engaging portion 211 when the seat 1 is in the above-mentioned specific state.

[0126] The engaged portion 207 and the locking mechanism 110 are connected to each other via a transmission member 115 . The displacement of the engaged portion 207 is transmitted to the locking mechanism 110 via the transmission member 115 , and the locking mechanism 110 restrains the operating portion 100 so as to be inoperable.

[0127] Thus, according to the present seat device 10, since the mechanical engagement relationship between the engaging portion 211 and the engaged portion 207 restricts the tilting operation, there is no need to use an electric power in a simple structure, and the operating portion 100 can be constrained to be inoperable only when the seat 1 is in the extended state, which is a specific state.

[0128] Furthermore, the present invention is characterized in that

[0129] The operating unit 100 can be displaced from a normal initial position to a use position during operation.

[0130] The locking mechanism 110 includes a locking pin 113 that can be engaged with or disengaged from the operating portion 100 located at the initial position.

[0131] The lock pin 113 is engaged with the operating portion 100 via the transmission member 115 by the displacement of the engaged portion 207 , thereby restricting the operating portion 100 to be inoperable.

[0132] As described above, in the seat device 10 , the lock pin 113 having a simple structure is directly engaged with or disengaged from the operation portion 100 , thereby easily preventing the operation portion 100 from being displaced by the reclining operation.

[0133] Furthermore, the present invention is characterized by comprising:

[0134] a rotating mechanism 40 that rotates the seat 1 about a rotation axis; and

[0135] The sliding mechanism 14 moves the seat 1 forward and backward from the fixed side together with the rotating mechanism 40.

[0136] With the linkage of the rotating mechanism 40 and the sliding mechanism 14, the state of the seat 1 can be changed into the following states:

[0137] The seat back is in an extended position generally parallel to wall A; and

[0138] The cross state is formed by moving away from the wall A in a direction substantially perpendicular to the above-mentioned extended state.

[0139] The above-mentioned specific state of the seat 1 corresponds to the above-mentioned extended state.

[0140] Therefore, as described in the above-mentioned embodiment, the seat device 10 can be directly applied to a general rotating seat mounted on a railway vehicle.

[0141] While the embodiments have been described above with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions that do not depart from the gist of the present invention are encompassed by the present invention.

[0142] For example, the shapes of the base 11, the movable platform 20, and the bottom frame 30 are not limited to those shown. Furthermore, although the seat 1 is described as a two-seater seat, a three-seater or a one-seater seat 1 may also be used. Furthermore, the seat's state transitions are not limited to the extended state, the cross-state, and the reverse cross-state.

[0143] Industrial Application Possibilities

[0144] The present invention can be widely used as a seat device for chairs used in theaters, homes, and offices, in addition to being used as a seat 1 for vehicles installed in passenger compartments of railway vehicles, aircraft, automobiles, ships, and the like.

[0145] Explanation of symbols

[0146] 10—seat device, 11—base, 14—sliding mechanism, 20—moving platform, 30—bottom frame, 40—rotation mechanism, 50—tilt mechanism, 60—rotation locking mechanism, 100—tilt operation part, 104—operating lever, 105—receiving component, 110—tilt operation locking mechanism, 113—locking pin, 200—rotation operation part, 204—foot pedal, 207—engaged part, 210—rotation operation preventing mechanism, 211—engaging part.

Claims

1. A seat device (10) capable of changing the state of a seat (1), characterized in that: have: a tilting mechanism (50) capable of tilting the backrest (3) of the seat (1); an operating unit (100) for performing an operation of tilting the backrest (3) through the tilting mechanism (50); A locking mechanism (110) that constrains the operating portion (100) to be inoperable; A snap-fit ​​portion (211) provided on a fixed side of the seat (1); as well as The engaged portion (207) is provided on the movable side of the seat (1) and is displaceable by engaging with the engaging portion (211) when the seat (1) is in a specific state. The engaged portion (207) and the locking mechanism (110) are connected to each other via a transmission member (115). The displacement of the engaged portion (207) is transmitted to the locking mechanism (110) via the transmission member (115). The locking mechanism (110) constrains the operating portion (100) to be inoperable. When the seat (1) is in the above-mentioned specific state, the operation of tilting the backrest (3) by the above-mentioned tilting mechanism (50) cannot be performed.

2. The seat device (10) according to claim 1, characterized in that The operating portion (100) can be displaced from a normal initial position to a use position during operation. The locking mechanism (110) includes a locking pin (113) that can be engaged with or disengaged from the operating portion (100) located at the initial position. The locking pin (113) engages with the operating portion (100) via the transmission member (115) by displacement of the engaged portion (207), thereby constraining the operating portion (100) to be inoperable.

3. The seat device (10) according to claim 1 or 2, characterized in that have: a rotating mechanism (40) that rotates the seat (1) about a rotation axis; and A sliding mechanism (14) that allows the seat (1) to advance and retreat from the fixed side together with the above-mentioned rotating mechanism (40), With the linkage of the rotating mechanism (40) and the sliding mechanism (14), the state of the seat (1) can be changed into an extended state in which the back of the seat is approximately parallel to the wall (A) and a crossed state in which the back of the seat is away from the wall (A) in a direction approximately perpendicular to the extended state. The above-mentioned specific state of the seat (1) corresponds to the above-mentioned extended state.

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