Seat device

Abstract

A seat device is provided, which can reliably prevent a seat occupant from rotating the seat when the back of the seat is in an extended state along a wall. The device comprises: a rotation locking mechanism (60) capable of restraining the rotation of a seat (1); a rotation operating unit (200) for performing a release operation based on the restraint of the rotation locking mechanism (60); and a rotation operation preventing mechanism (210) for preventing a release operation in the rotation operating unit (200) when the seat (1) is in an extended state. The rotation operation preventing mechanism (210) comprises: an engaging unit (211) provided on a base (11); and an engaged unit (207) provided on the rotation operating unit (200) on a moving platform (20) and engaging with the engaging unit (211) when the seat (1) is in an extended state, thereby preventing a release operation of the rotation operating unit (200).

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 sides and can accommodate multiple people, and are generally installed along the walls in passenger compartments. Such seats are known as swivel seats that can be rotated about a rotation axis at the center of the seat to change the direction between an extended state in which the back of the seat is parallel to the wall and a crossed state in which the back of the seat is perpendicular to the wall.

[0003] In such a rotating seat, a seat device is proposed that includes a sliding mechanism in addition to a rotating mechanism of the seat, and a transmission mechanism that links the mechanisms so that when the seat is rotated from an extended state along a wall to a crossed state, the trajectory (rotation radius) of the seat does not interfere with the wall. For example, refer to Patent Document 1.

[0004] That is, in order to maximize the width of the aisle between the seats on both sides in the passenger compartment and obtain a comfortable space, the seat's rotation axis is positioned near the wall in the extended state, and the seat's rotation axis is slid toward the aisle side so that the seat does not interfere with the wall in the crossed state. Therefore, in order to prevent the seat from interfering with the wall in the extended state, it is necessary to limit the rotation of the seat caused by the seated person's operation.

[0005] Here, as a locking mechanism for restricting the rotation of the seat, a structure is generally used in which a locking pin is made to protrude from the fixed side of the seat toward the seat. In this locking mechanism, as a structure for preventing the seated person from performing the unlocking operation only in the extended state, it is not enough to simply store the pedal for performing the unlocking operation (see paragraph 0062 of Patent Document 1). Therefore, there is a known technology that provides a difference between the electric operation and the manual operation in the stroke of the locking pin from the locking position to the unlocking position (see paragraph 0053 of Patent Document 2).

[0006] Prior art literature

[0007] Patent Literature

[0008] Patent Document 1: Patent No. 3431772

[0009] Patent Document 2: Japanese Patent Application Publication No. 2018-016217 Summary of the invention

[0010] However, in the existing rotating device, in the locking mechanism for limiting the rotation of the seat, the number of parts is large and the structure is complicated, as the structure is used to prevent the seated person from performing the lock release operation only in the extended state. It is hoped that the cost will be further reduced, and the precision adjustment between the parts is troublesome, and there is also a concern that malfunctions may occur.

[0011] The present invention is a solution proposed with focus on the problems of the prior art as described above, and its purpose is to provide a seat device that utilizes a simple structure and does not lead to increased costs. When the seat is in a specific state (extended state), it can reliably prevent the seat occupant from rotating the seat.

[0012] 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 the seat can rotate around a rotation axis and has:

[0013] A rotation locking mechanism capable of restraining the seat at multiple rotation angles;

[0014] a rotation operation unit that performs a release operation of the restraint by the rotation lock mechanism; and

[0015] The rotation operation preventing mechanism prevents the release operation of the rotation operation part from being performed when the seat is in a specific state of a rotation angle.

[0016] The above-mentioned rotation operation preventing mechanism comprises:

[0017] A snap-fit ​​portion disposed on a fixed side of the seat; and

[0018] The engaged portion is provided on the rotating operation portion on the movable side of the seat, and is engaged with the engaging portion when the seat is in the specific state, thereby making the releasing operation in the rotating operation portion impossible.

[0019] According to the seat device of the present invention, when the state of the seat can be changed, the rotation operation of the seat can be reliably prevented when the seat is in a specific state by using a simple structure without causing cost increase. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The cross state of the seat device according to the embodiment of the present invention is shown, (a) is a perspective view of the entire seat, (b) is an enlarged perspective view of the reclining operation part, and (c) is an enlarged perspective view of the rotating operation part.

[0021] 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 a reclining operation portion, and (c) is an enlarged perspective view of a rotating operation portion.

[0022] Figure 3 It is a perspective view showing the internal structure of the seat device according to the embodiment of the present invention.

[0023] Figure 4 It is a front view showing a crossed state of the seat device according to the embodiment of the present invention.

[0024] Figure 5 It is a side view showing the seat device according to the embodiment of the present invention in an extended state.

[0025] Figure 6 It is a perspective view showing a base, a moving platform, and a bottom frame of the seat device according to the embodiment of the present invention.

[0026] Figure 7 It is a side view showing an initial position of the reclining operation portion of the seat device according to the embodiment of the present invention.

[0027] 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.

[0028] Fig. 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.

[0029] Fig.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 an initial position and cannot be operated.

[0030] Fig.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 by the rotation operation preventing mechanism so as to be inoperable.

[0031] Fig.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.

[0032] Fig.13 It is a perspective view showing a rotation locking mechanism of a seat device according to an embodiment of the present invention.

[0033] Fig.14 It is a perspective view showing a state where the rotation lock mechanism of the seat device according to the embodiment of the present invention is viewed from the bottom.

[0034] Fig.15 It is an explanatory diagram 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

[0035] Hereinafter, representative embodiments of the present invention will be described based on the drawings.

[0036] Figure 1 to Figure 15 This shows one embodiment of the present invention.

[0037] 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 is an example of a two-seater chair installed in the passenger compartment of a railway vehicle. 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.).

[0038] <Overview of Seat Device 10>

[0039] like Figure 6 As shown, the seat device 10 comprises: a base 11 fixed on the floor surface; a moving platform 20 supported on the base 11 so as to be able to move forward and backward in the forward and backward directions; and a bottom frame 30 of the seat 1 supported on the moving 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 moving 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 near the wall (window) in the passenger compartment of the railway vehicle. Figure 6 The "A" in FIG. 1 is a portion of the wall parallel to the traveling direction of the railway vehicle.

[0040] In the seat device 10, the bottom frame 30 of the seat 1 is supported on the moving platform 20 so as to be rotatable around the rotation axis via the rotating mechanism 40. The moving platform 20 is supported on the base 11 so as to be able to move forward and backward together with the rotating mechanism 40 via the sliding mechanism 14. Although not shown in the figure, the seat device 10 includes a linkage mechanism in order to link the forward and backward movement of the seat 1 by the sliding mechanism 14 with the rotation of the seat 1 by the rotating mechanism 40.

[0041] <About Seat 1>

[0042] like Figure 1 As shown in FIG. 1 , the seat 1 is provided with two seats 2 and a backrest 3 arranged side by side in 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 side of each sleeve 4 is formed into an armrest 5 extending roughly horizontally forward and backward. The lower end side of the backrest 3 is tilted via a tilt mechanism 50 (see FIG. 1 ). Figure 3 ) is supported on the rear end side of the seat 2 in a tiltable manner.

[0043] <Tilt mechanism 50>

[0044] like Figure 3 As shown, the reclining mechanism 50 supports the backrest 3 in a tiltable manner within a predetermined angle 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 the cylinder body 52 so as to be retractable, and is arranged on the bottom frame 30 in parallel with the front-rear direction. The damper 51 is urged in the direction in which the piston rod 53 is accommodated in the cylinder body 52, but the piston rod 53 can be fixed in a state of protruding by an arbitrary amount.

[0045] The rear end of the cylinder body 52 can be connected to the lower end of the frame 3a inside the backrest 3 in a push-pull manner. On the other hand, the front end of the rod 53 that emerges and retracts from the front end of the cylinder body 52 is connected to a suitable position on the front end side of the bottom frame 30. By means of such a damper 51, the backrest 3 can be maintained at an arbitrary tilting angle. That is, the structure is such that when the damper 51 is in a locked state, the piston rod 53 is fixed in a state of protruding a predetermined amount from the cylinder body 52, and the backrest 3 can be maintained at an arbitrary tilting angle.

[0046] When the lock state of the damper 51 is released, the backrest 3 returns to the most upright initial position due to the force of the piston rod 53 being stored in the cylinder body 52. ​​In this unlocked state, the seated person overcomes the restoring force of the damper 51 and pushes the backrest 3 backward, thereby adjusting the backrest 3 to an arbitrary tilting angle.

[0047] The locking mechanism of the damper 51 is a general locking mechanism, so detailed description is omitted, but a release button 54 for releasing the locked state is provided next to the piston rod 53. A tilt operation part 100 for releasing the locked state by pressing the release button 54 is provided at the front end of the armrest 5. In addition, the tilt operation part 100 corresponds to the "operating part" of the present invention.

[0048] <Tilt Operation Unit 100>

[0049] like Figure 1 As shown, the reclining operation unit 100 is formed by assembling various components into a housing 101 and 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.

[0050] like Fig. 9 , Fig.10 As shown in FIG. 1 , the rotary operation unit 100 includes an operation lever 104, which is swingably supported on a support bracket 102 fixed to a housing 101 via a pivot 103. The upper end side of the operation lever 104 uses the pivot 103 supported by the shaft as the swing center, and the lower end side can swing in the forward and backward directions. The operation lever 104 is stored in the initial position of the housing 101 at the lower end side (refer to FIG. 1 ). Figure 7 ), and the operating position where the lower end side is pulled forward (refer to Figure 8)swing.

[0051] A receiving member 105 of a tilt operation locking mechanism 110 described below is fixed to the inner side of the operating rod 104. One end of a tilt operation cable 106 extending to the release button 54 is connected to the receiving member 105. Here, by pulling the operating rod 104 forward to the operating position, the link on the release button 54 side is pulled via the tilt operation cable 106 to press the release button 54, thereby releasing the locked state of the damper 51. In addition, the operating rod 104 is usually urged at the initial position stored in the rear via the tilt operation cable 106.

[0052] <Tilt Operation Lock Mechanism 110>

[0053] In addition, a reclining operation locking mechanism 110 is attached to the reclining operation portion 100, and the reclining operation locking mechanism 110 restrains the reclining operation portion 100 so that it cannot be operated. When the seat 1 is in the extended state (specific state) described later, the reclining operation locking mechanism 110 restrains the reclining operation portion 100 so that it cannot be operated. In addition, the reclining operation locking mechanism 110 is equivalent to the "locking mechanism" of the present invention.

[0054] like Fig. 9 As shown in FIG. 1 , the tilt operation lock mechanism 110 includes a substantially L-shaped link 112 supported on the housing 101 via a pivot 111 so as to be swingable in the forward and backward directions. The link 112 supports a lock pin 113 swingably upward at one end side of the pivot 111. The lock pin 113 is arranged so that its upper end side passes through a guide hole 102a located in the support bracket 102, and is vertically protruded and retracted in the upward and downward directions as the link 112 swings.

[0055] The receiving member 105 located on the inner side of the operating rod 104 is provided with a locking hole 105a in which the front end of the locking pin 113 can be inserted and retracted when the operating rod 104 is in the initial position. Fig. 9 A force is applied in the clockwise direction about the pivot 111 so that the locking pin 113 is normally disengaged from the locking hole 105 a of the receiving member 105 .

[0056] One end of a reclining lock cable 115 is connected to the link 112 at the other end side of the pivot 111 via a connector 116. The other end of the reclining lock cable 115 extends to the side of a rotating operation unit 200 to be described later. When the seat 1 is in a specific state (an extended state to be described later), the reclining lock cable 115 is pulled from the side of the rotating operation unit 200, thereby restraining the reclining operation unit 100 from being operated.

[0057] That is, the tilt lock cable 115 causes the link 112 to overcome the force of the spring member 114 and move to the Fig. 9 , Fig.10 The tilt lock cable 115 is equivalent to the "transmission member" of the present invention.

[0058] like Figure 7 , Figure 8 As shown in FIG. 1 , the structural components of the tilt operation locking mechanism 110 disposed on the housing 101 are covered by a cover 101a in the form of a hood. A circular arc-shaped guide groove 101b centered on the pivot 111 of the connecting rod 112 is formed in the housing 101 and the cover 101a. A pivot 117 pivotally supporting the connector 116 at the other end of the connecting rod 112 is movably engaged with the guide groove 101b, so that the swing range centered on the pivot 111 of the connecting rod 112 is limited.

[0059] <About the orientation of seat 1>

[0060] The seat device 10 can transform the state of the seat 1 into an extended state in which the seat back is substantially parallel to the wall A (see 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 includes - cross state (refer to Figure 1 ) and the reverse cross state which is 180 degrees opposite to the - cross state. Fig.15 As shown, if the extended state of the seat 1 is taken as the original position and the rotation angle is set to 0°, the rotation angle of the -cross state is 90°, and the rotation angle of the reverse cross state is -90°. In addition, the back surface of the seat is synonymous with the back surface of the backrest 3. Hereinafter, the cross state and the reverse cross state are collectively referred to as the cross state, which is simply expressed as the cross state.

[0061] <Base 11>

[0062] like Figure 6 As shown, the base 11 is fixed to the floor surface next to the wall A in the passenger room. The base 11 is formed by combining frame materials in a long platform shape in a direction (front-rear direction) approximately perpendicular to the wall A. The upper surface side of the base 11 is approximately horizontal, and is surrounded by the two side ends 12, 12 constituting the long sides and the rear end of the short side constituting the rear side (wall A side), but the front side (passage side) is open.

[0063] The base 11 is configured such that its rear end is approximately parallel to the wall A, and the two side ends 12, 12 are approximately perpendicular to the wall A and face the passage side. In addition, on the upper surface side of the base 11, in addition to the sliding mechanism 14 described later, related components such as a stopper for limiting the advance and retreat range and the rotation direction of the bottom frame 30 are also provided.

[0064] <Sliding mechanism 14>

[0065] like Figure 6 As shown, a movable table 20 is mounted on the upper surface side 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 on the inner sides of both side ends 12, 12 of the base 11. The pair of guide rails 14a, 14a are opposed to each other in parallel along both long sides on the upper surface side of the base 11, and both side portions 21, 21 of the movable table 20 described later can be slidably fitted in the inner sides of each guide rail 14a as it is.

[0066] <Mobile station 20>

[0067] like Figure 6 As shown, the moving platform 20 is arranged approximately horizontally on the upper surface side of the base 11, and is composed of a combination of frame materials in a rectangular frame group shape. The two side ends 21, 21 constituting the long side of the moving platform 20 are slidably fitted into the inner side of the pair of guide rails 14a, 14a mentioned above. Therefore, the moving platform 20 can slide in a manner that it can move forward or backward in a direction approximately perpendicular to the wall A. A rotating mechanism 40 for rotating the seat 1 around the rotation axis is provided approximately in the center of the moving platform 20.

[0068] <Rotation mechanism 40>

[0069] The rotating mechanism 40 supports the bottom frame 30 of the seat 1 on the moving platform 20 so as to be rotatable in forward and reverse directions on a substantially horizontal plane. The rotating mechanism 40 is configured as a unit in which a pair of inner and outer annular rotating disks are combined to be rotatable with each other by interposing a bearing or the like therebetween. In the rotating mechanism 40, the outer rotating disk is fixed to the moving platform 20, and the inner rotating disk is fixed to the bottom frame 30.

[0070] The rotation axis that becomes the rotation center of the seat 1 is the center line of the rotation mechanism 40, and in this embodiment, it is not a structure that follows the actual physical situation. Figure 4 As shown, the rotating mechanism 40 has a motor 41 as a power source. A speed reducer is attached to the motor 41, and a driving gear located on its output shaft is rotatably engaged with a sprocket 42 centered on a rotating shaft provided on the bottom frame 30 side. In addition, the rotating mechanism 40 can also rotate the seat manually.

[0071] <Bottom frame 30>

[0072] like Figure 6 As shown, the bottom frame 30 is mounted on the seat 1 and supported by the rotating mechanism 40 on the moving platform 20. The bottom frame 30 is composed of, for example, a metal plate that is consistent with the bottom surface of the seat 2. A sprocket 42 is integrally provided on the lower surface side of the bottom frame 30, and the sprocket 42 is rotatably engaged with the driving gear of the motor 41 mentioned above.

[0073] <Linkage Mechanism>

[0074] The seat device 10 also includes a linkage mechanism (not shown) that links the rotation and advance and retreat of the seat 1 so that the seat 1 does not interfere with the wall A when the seat 1 is changed to the extended state, the negative cross state, and the reverse cross state.

[0075] When the linkage mechanism rotates the seat 1 together with the bottom frame 30, the rotation of the bottom frame 30 is converted into linear motion and transmitted to the moving platform 20, so that the moving platform 20 and the bottom frame 30 move forward and backward in a linear direction in a manner of approaching or moving away from the wall A. The type of such linkage mechanism is not particularly limited, but specifically, it is preferable to use, for example, the invention described in Japanese Patent Application No. 2018-187971 applied for by the present applicant, or the invention proposed in Japanese Patent Application No. 2019-239066, which is not disclosed.

[0076] <Rotation Lock Mechanism 60>

[0077] The seat device 10 includes a rotation locking mechanism 60, which constrains the bottom frame 30 (seat) so that it cannot rotate in each rotation position of the extended state, the negative cross state, and the reverse cross state. The rotation locking mechanism 60 locks the bottom frame 30 so that it cannot rotate relative to the base 11, so inevitably, the moving platform 20 is also constrained so that it cannot move forward or backward relative to the base 11.

[0078] like Figure 6 As shown, the rotation lock mechanism 60 includes: a lock pin 61 extending from the base 11 side to the bottom frame 30 and being able to be moved up and down; and locking holes 62a, 62b, 62c provided in the bottom frame 30 and for engaging or disengaging the lock pin 61. A total of three locking holes 62a, 62b, 62c are provided in the substantially rectangular bottom frame 30, one long side along the back of the seat, and two short sides along both sides of the seat.

[0079] The locking pin 61 is assembled to the unit 60a, and the unit 60a is fixed to the rear end of the upper surface side of the base 11. The locking pin 61 can be retracted upward from the upper surface side of the base 11, and can be moved between a locking position where it protrudes upward and fits into the locking holes 62a, 62b, and 62c, and a lock release position where it is retracted downward and disengaged from the locking holes 62a, 62b, and 62c.

[0080] When the seat 1 is transformed into the extended state, the -cross state, and the reverse cross state, the locking pin 61 is embedded in the locking holes 62a, 62b, and 62c on the bottom frame 30 side that are consistent in each position, thereby constraining the seat 1 to be unable to rotate. That is, in the extended state, the locking pin 61 is embedded in the locking hole 62a located on one long side of the bottom frame 30. In addition, in the -cross state, the locking pin 61 is inserted into the locking hole 62b located on one short side of the bottom frame 30 and is engaged. And, in the reverse cross state, the locking pin 61 is embedded in the locking hole 62c located on the other short side of the bottom frame 30.

[0081] like Fig.13 , Fig.14 As shown, a unit 60a in which the lock pin 61 is assembled is provided with a spring member (not shown) which makes the lock pin 61 protrude upward and always urge it to the locked position, and a link 60b which makes the lock pin 61 overcome the urging force of the spring member and sink to the unlocked position below.

[0082] 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 each operating cable, 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 Fig.11 ) is stretched and the restraint of the rotation locking mechanism 60 is released.

[0083] On the other hand, the power source of the operating cable for the electric pulling operation is, for example, also used as the motor 41 of the rotating mechanism 40. That is, the motor 41 has a clutch, and is configured so that, by switching the clutch, the seat can be switched between the action of rotating the seat by the rotating mechanism 40 and the action of retracting the lock pin 61 to release the lock. In addition, the structure related to the clutch of the motor 41 is a general structure, so the detailed description is omitted.

[0084] In the rotation lock mechanism 60 of the present embodiment, when the seat 1 is in the extended state, the restraint by the rotation lock mechanism 60 cannot be released by manual operation in the rotation operation unit 200, and can be released only by electric operation based on the motor 41. Here, the electric operation is performed by the train crew or station staff, and the manual operation is mainly performed by the passengers.

[0085] <Rotation operation unit 200>

[0086] In addition, the rotation lock mechanism 60 is provided with a rotation operation unit 200 for performing a release operation based on the restraint of the lock pin 61. Figure 1As shown, the rotation operation unit 200 is assembled into a unit by assembling various components in a housing 201, and is fixed to a mounting portion 22 hanging down toward the front end side of the moving stage 20 (see Figure 6 ).

[0087] like Figure 1 (a) Figure 2 (a) Fig.11 , Fig.12 As shown, the rotation operation unit 200 includes a foot pedal 204, which is swingably supported at the lower end of a support bracket 202 fixed to the front side of the housing 201 via a pivot 203. The foot pedal 204 is swingable in the front and rear directions with the pivot 203 on the base end side of the foot pedal 204 as the swing center. In addition, the foot pedal 204 is equivalent to the "pedal" of the present invention.

[0088] The footrest 204 is in the use position where the front end side protrudes toward the front of the housing 201 (see Fig.11 ) and the storage position where the front side is pulled upward (refer to Fig.12 ) swing. The foot pedal 204 is usually urged in the use position protruding forward via the spring member 205. Here, when the foot pedal 204 is in the use position, it is possible to release the restraint based on the rotation locking mechanism 60 by stepping on it, but when the foot pedal 204 is in the storage position, the operation of releasing the restraint based on the rotation locking mechanism 60 cannot be performed. In addition, the spring member 205 is equivalent to the "urging member" of the present invention.

[0089] The other end of the operating cable 206 for manual operation extending to the rotation locking mechanism 60 is connected to the base end of the foot pedal 204 via a connector. Here, when the foot pedal 204 in the use position is stepped on downward, the operating cable 206 is pulled to lock the pin 61 (see Fig.13 ) sinks downward, and the locked state of the rotation locking mechanism 60 is released.

[0090] In addition, a pin-shaped engaged portion 207 protruding in both directions is fixed to the base end side of the footrest 204 at a position eccentric from the pivot 203. The other end side of the tilt lock cable 115 extending from the tilt operation lock mechanism 110 is connected to the engaged portion 207 via a connector. Here, when the engaged portion 207 is engaged with the engaging portion 211 described below, the tilt lock cable 115 is pulled and the lock pin 113 of the tilt operation lock mechanism 110 protrudes upward, thereby restraining the tilt operation unit 100 so that it cannot be operated.

[0091] <Rotation Operation Prevention Mechanism 210>

[0092] In addition, a rotation operation preventing mechanism 210 is attached to the rotation operation unit 200, and the rotation operation preventing mechanism 210 cannot perform a release operation based on the restraint of the rotation operation unit 200. When the seat 1 is in the extended state, the rotation operation preventing mechanism 210 cannot operate the footrest 204. The extended state here corresponds to the "specific state in which the seat 1 is rotated by one angle" in the present invention.

[0093] like Fig.11 , Fig.12 As shown, the rotation operation preventing mechanism 210 includes an engaging portion 211 provided on the base 11 as the fixed side of the seat 1, and an engaged portion 207 of the above-mentioned rotation operation portion 200 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 protruding obliquely upward toward the front.

[0094] As described above, the engaged portion 207 is provided in a pin-shaped manner at a position eccentric from the pivot 203 on the base end side of the footrest 204. The engaged portion 207 is set so as to be engaged with the engaging portion 211 when the seat 1 is in the extended state (specific state). When the engaged portion 207 is engaged with the engaging portion 211, the footrest 204 is swung to the storage position against the force of the spring member 205, so that the release operation in the rotation operation portion 200 cannot be performed. At the same time, the tilt operation portion 100 is restrained and cannot be operated.

[0095] <Operation of the Seat Device 10>

[0096] The following is based on Fig.15 , the action of changing the state of the seat 1 is described. First, Fig.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 retreated (approached) to the wall A. Here, the long side of the bottom frame 30 (back side of the seat) is roughly parallel to the wall A, and the rotation angle becomes 0°.

[0097] <<Restriction on the rotation operation of the seat 1>>

[0098] When the seat 1 is in the extended state, the bottom frame 30 is restrained by the rotation locking mechanism 60 so as not to rotate relative to the moving platform 20. 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 constrained to be unable to move forward or backward.

[0099] like Figure 2As shown in FIG. 1 , 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 located on the moving platform 20 is engaged with the engaging portion 211 located on the base 11. Then, the footrest 204 overcomes the biasing force of the spring member 205 and swings toward the upright storage position, and is restrained in the storage position.

[0100] Thus, when the seat 1 is in the extended state, the footrest 204 is not only simply displaced to the inoperable storage position, but is also firmly held in the storage position by the engagement relationship between the engagement portion 211 and the engaged portion 207. Therefore, in the extended state, the release operation in the rotation operation portion 200 cannot be performed. With such a simple structure, the seat occupant can be reliably prevented from performing the rotation operation of the seat 1 in the extended state.

[0101] <<Restriction of the reclining operation of the backrest 3>>

[0102] When the seat 1 is in the extended state, the tilt operation lock mechanism 110 prevents the tilt operation of the tilt operation unit 100. Specifically, when the footrest 204 is swung upward by the engagement of the engaged portion 207 and the engaging portion 211, the tilt lock cable 115 connected to the engaged portion 207 is pulled, and the tilt operation unit 100 is restrained and cannot be operated.

[0103] That is, Fig.10 As shown, if the tilt lock cable 115 is pulled, the link 112 overcomes the force of the spring member 114. Fig.10 The connecting rod 112 is swung counterclockwise around the pivot 111. Then, the locking pin 113 at one end of the connecting rod 112 protrudes upward and is embedded in the locking hole 105a of the receiving component 105, which is integrated with the operating rod 104 at the initial position.

[0104] Thus, when the seat 1 is in the extended state, the reclining operation based on the reclining operation unit 100 cannot be performed, and the backrest 3 cannot be tilted down by the reclining mechanism 50. With this simple structure, the reclining operation of the backrest 3 by the seated person in the extended state can be reliably prevented, and the backrest 3 can be prevented from accidentally tilting down and interfering with the wall A.

[0105] <<Transformation from the extended state to the crossed state>>

[0106] like Fig.15 (a)~ Fig.15As shown in (c), if the bottom frame 30 (seat 1) is to be transformed from the extended state to the -crossed state (rotation angle 90°), it is first necessary to release the rotation constraint based on the rotation lock mechanism 60. Here, the action of disengaging the lock pin 61 from the locking hole 62a cannot be performed by operating the foot pedal 204 as described above, but is performed by electric operation using the power of the motor 41.

[0107] exist Fig.15 In the extended state shown in (a), after the restraint by the rotation locking mechanism 60 is released, Fig.15 As shown in (b), if the bottom frame 30 is moved in the positive direction ( Fig.15 The bottom frame 30 rotates while advancing through the linkage mechanism. That is, the bottom frame 30 rotates while advancing to the passage side while rotating in the positive direction in a manner that does not interfere with the wall A.

[0108] like Fig.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 embedded in 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.

[0109] <<Release of the restraint of the rotation operation of the seat 1>>

[0110] 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. Fig.15 In the crossing state shown in (c), the movable stage 20 is most advanced (moved away) relative to the wall A side, and the front end side of the movable stage 20 is configured to move away from the front end side of the base 11 to the front. In this positional relationship, as shown in FIG. Fig.11 As shown, the engaged portion 207 of the footrest 204 of the moving platform 20 is not engaged with the engaging portion 211 of the base 11 but is separated. Therefore, the footrest 204 is in a use position protruding forward by the urging force of the spring member 205.

[0111] 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. Fig.11 In the embodiment, when the foot pedal 204 is stepped on and swung, the operating cable 206 is pulled and the locking pin 61 (see Fig.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.

[0112] <<Release of the restraint of the reclining operation of the backrest 3>>

[0113] 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. Fig.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 forward protruding use position due to the force of the spring member 205, and the tilt lock cable 115 is in an unstretched state.

[0114] Therefore, if Fig. 9 As shown, in the reclining operation locking mechanism 110, the link 112 is in a state where the locking pin 113 does not protrude upward due to the force of the spring member 114. Therefore, the locking pin 113 does not come out of the locking hole 105a of the receiving member 105 integral with the operating rod 104, and the inoperability of the operating rod 104 is released, allowing the reclining operation to be performed. Therefore, the seated person can tilt the backrest 3 at any angle through the reclining mechanism 50, and can have a good riding feeling.

[0115] <<Transition from -cross state to reverse cross state>>

[0116] exist Fig.15 In the cross state shown in (c), after releasing the restraint of the rotation locking mechanism 60, if the bottom frame 30 is moved in the opposite direction (in Fig.15 If the bottom frame 30 rotates clockwise (clockwise in the figure), the bottom frame 30 can move backward or forward while rotating, for example, by means of a linkage mechanism not shown in the figure. Fig.15 As shown in (d), the bottom frame 30 is temporarily held in the position where it has advanced in a state parallel to the extended state, and then rotates in the reverse direction without advancing or retreating.

[0117] like Fig.15 As shown in (e), if 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 again so as not to rotate. This transformation 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 to the transformation from the above-mentioned extended state to the -cross state, and from the -cross state to the reverse cross state.

[0118] <Structure and effects of the present invention>

[0119] 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 derived from the above-described embodiments will be described below.

[0120] <Structure and effects of the present invention>

[0121] 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 derived from the above-described embodiments will be described below.

[0122] First, the present invention is a seat device 10 capable of changing the state of a seat 1, characterized in that:

[0123] The seat 1 has:

[0124] A rotation locking mechanism 60, which can rotate around a rotation axis and can restrain the seat 1 at multiple rotation angles;

[0125] A rotation operation unit 200 for performing a release operation of the restraint by the rotation lock mechanism 60; and

[0126] The rotation operation preventing mechanism 210 prevents the release operation of the rotation operation unit 200 from being performed when the seat 1 is in a specific state of a rotation angle.

[0127] The rotation operation preventing mechanism 210 includes:

[0128] The engaging portion 211 is disposed on the fixed side of the seat 1; and

[0129] The engaged portion 207 is provided on the rotating operation portion 200 at the movable side of the seat 1, and is engaged with the engaging portion 211 when the seat 1 is in the specific state, thereby making the releasing operation of the rotating operation portion 200 impossible.

[0130] In the seat device 10, when the seat 1 is in the extended state as a specific state, the back of the seat is close to the wall A, but the seat 1 cannot be rotated by the seated person, so that the passenger does not change the position at will. Here, the rotation of the seat 1 requires the rotation operation unit 200 to release the restraint based on the rotation lock mechanism 60. Therefore, the rotation operation blocking mechanism 210 prevents the rotation of the rotation operation unit 200, and thus the rotation of the seat 1 cannot be performed.

[0131] In the rotation operation preventing mechanism 210, when the seat 1 is in the extended state, the engaged portion 207 of the rotation operation portion 200 located on the movable side of the seat 1 is engaged with the engaging portion 211 located on the fixed side of the seat 1, thereby preventing the release operation of the rotation operation portion 200. According to the mechanical engagement relationship between the engaging portion 211 and the engaged portion 207, there is no need to use electric power in a simple structure, and the seat 1 cannot be rotated by the seated person only when the seat 1 is in the extended state.

[0132] Furthermore, the present invention is characterized in that

[0133] The rotation operation unit 200 can be displaced to a use position where the operation can be released and a storage position where the operation cannot be released.

[0134] When the seat 1 is in the specific state, the rotation operation preventing mechanism 210 engages the engaged portion 207 with the engaging portion 211 to displace the rotation operation portion 200 from the normal use position to the storage position and restrain the rotation operation portion 200 at the storage position.

[0135] Thus, in the seat device 10, when the seat 1 is in the extended state, which is a specific state, the engaged portion 207 engages with the engaging portion 211, thereby displacing the rotation operation portion 200 from the normal use position to the storage position. Therefore, the seat occupant cannot operate the rotation operation portion 200 itself, and the seat occupant can easily understand and restrict the rotation of the seat 1.

[0136] Furthermore, the rotary operation unit 200 is not simply displaced to the storage position, but is restrained from being displaced from the storage position by the engagement relationship between the engagement unit 211 and the engaged unit 207. Therefore, it is possible to reliably prevent the seated person from accidentally returning the rotary operation unit 200 to the use position.

[0137] Furthermore, the present invention is characterized by comprising:

[0138] a rotating mechanism 40 that rotates the seat 1 about a rotation axis; and

[0139] The sliding mechanism 14 enables the seat 1 to move forward and backward from the fixed side together with the above-mentioned rotating mechanism 40,

[0140] Through 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:

[0141] The seat back is in an extended state substantially parallel to the wall A;

[0142] The cross state is in which the wall A is separated from the wall A in a direction substantially perpendicular to the above-mentioned extended state.

[0143] The above-mentioned specific state of the seat 1 corresponds to the above-mentioned extended state.

[0144] 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.

[0145] Furthermore, the present invention is characterized by comprising:

[0146] A base 11, which serves as a fixed side of the seat 1 and is fixed to the floor surface; and

[0147] The movable platform 20, which is a movable side of the seat 1, is supported on the base 11 via the slide mechanism 14 so as to be able to move forward and backward, and supports the seat 1 via the rotation mechanism 40 so as to be able to rotate.

[0148] The engaging portion 211 is disposed on the base 11.

[0149] The rotation operation portion 200 and the engaged portion 207 are provided on the moving stage 20 .

[0150] As described above, in the seat device 10 , it is possible to realize a layout in which the engaging portion 211 and the engaged portion 207 of the rotational operation preventing mechanism 210 are optimal components among the minimum necessary components of the seat device 10 .

[0151] Furthermore, the present invention is characterized in that

[0152] The rotation operation unit 200 includes a pedal 204, which is supported at one end of the moving platform 20 so as to be swingable with the base end as the rotation center, in the use position protruding forward and the storage position standing upward.

[0153] The engaged portion 207 is disposed at a position eccentric from the rotation center of the pedal 204.

[0154] The pedal 204 is usually maintained at the use position by the biasing member 205 , and when the engaged portion 207 is engaged with the engaging portion 211 , the pedal 204 is swung toward the storage position against the biasing force of the biasing member 205 and is restrained at the storage position.

[0155] As described above, in the seat device 10 , the rotation operation portion 200 , the engaging portion 211 of the rotation operation preventing mechanism 210 , and the engaged portion 207 can be easily realized by a simple structure among the minimum necessary components of the seat device 10 .

[0156] As mentioned above, although embodiment is described based on drawings, the specific structure is not limited to these embodiments, and the change and addition within the range which does not deviate from the meaning of this invention are included in this invention.

[0157] For example, the shapes of the base 11, the moving platform 20, and the bottom frame 30 are not limited to the shapes shown in the figure. In addition, the seat 1 is described as an example of a two-seater, but it can also be a three-seater or a one-seater seat 1. In addition, the state transformation of the seat is not limited to the extended state, the negative cross state, and the reverse cross state.

[0158] Possibility of industrial application

[0159] The present invention can be widely used as a seat device for chairs used in theaters, homes, and offices, in addition to the seat 1 for transportation vehicles such as railway vehicles, aircrafts, automobiles, and ships.

[0160] Explanation of symbols

[0161] 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 operating part, 104—operating rod, 105—receiving part, 110—tilt operation locking mechanism, 113—locking pin, 200—rotation operating 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: The seat (1) can rotate around a rotation axis and has: A rotation locking mechanism (60) capable of restraining the seat (1) at multiple rotation angles; A rotation operation unit (200) for performing a release operation based on the restraint of the rotation locking mechanism (60); as well as The rotation operation preventing mechanism (210) prevents the release operation in the rotation operation unit (200) from being performed when the seat (1) is in a specific state of a rotation angle. The rotation operation preventing mechanism (210) comprises: A snap-fit ​​portion (211) disposed on a fixed side of the seat (1); and The engaged portion (207) is provided on the movable side of the seat (1) on the above-mentioned rotating operation portion (200), and when the seat (1) is in the above-mentioned specific state, it is engaged with the above-mentioned engaging portion (211), thereby making it impossible to perform a release operation in the above-mentioned rotating operation portion (200). The rotating operation part (200) can be displaced to a use position where the operation can be released and a storage position where the operation cannot be released. When the seat (1) is in the above-mentioned specific state, the above-mentioned rotation operation preventing mechanism (210) engages with the above-mentioned engaging part (211) through the above-mentioned engaged part (207) to cause the above-mentioned rotation operation part (200) to move from the above-mentioned normal use position to the above-mentioned storage position, and is constrained in the storage position.

2. The seat device (10) according to claim 1, characterized in that have: a rotating mechanism (40) that rotates the seat (1) around a rotation axis; and A sliding mechanism (14) enables the seat (1) to move forward and backward from the fixed side together with the above-mentioned rotating mechanism (40), By 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 roughly 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 roughly orthogonal to the extended state. The above-mentioned specific state of the seat (1) corresponds to the above-mentioned extended state.

3. The seat device (10) according to claim 2, characterized in that have: A base (11) serving as a fixed side of the seat (1) and fixed to the floor surface; and The movable platform (20) is a movable side of the seat (1), supported on the base (11) via the sliding mechanism (14) so ​​as to be able to move forward and backward, and supports the seat (1) via the rotating mechanism (40) so as to be able to rotate. The engaging portion (211) is disposed on the base (11). The rotation operation part (200) and the engaged part (207) are provided on the moving platform (20).

4. The seat device (10) according to claim 3, characterized in that The rotation operation unit (200) includes a pedal (204) which is swingably supported at one end of the moving platform (20) with the base end side supported by a pivot as the rotation center, in the use position protruding toward the front of the moving platform and the storage position standing upward from the moving platform. The engaged portion (207) is disposed at a position eccentric from the rotation center of the pedal (204). The pedal (204) is maintained in the use position by the force member (205). On the other hand, when the engaging portion (207) engages with the engaging portion (211), the pedal (204) overcomes the force of the force member (205) and swings toward the storage position, and is restrained in the storage position.

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