Long / cross seating

Abstract

The locking mechanism that prevents the backrest from reclining in the extended position is made more accessible during adjustment, improving maintainability. Furthermore, it is designed to avoid restricting the movement of the armrests. [Solution] A long / cross switchable seat with a reclining backrest, wherein the reclining mechanism includes a fluid pressure cylinder disposed on the side of the seat frame and connected to the backrest, the reclining lock mechanism includes a first movable body disposed on the side of the frame and connected to the fluid pressure cylinder, and a reclining lock wire that locks the first movable body in the long position, and the reclining lock release mechanism includes the first movable body, a reclining operating body provided on the armrest, and a reclining operating wire connecting the reclining operating body and the first movable body.

Description

Technical Field

[0001] The present invention relates to a long cross-switchable seat.

Background Art

[0002] In vehicles such as railway vehicles and buses, a seat having a seat part and a backrest is rotated around a vertical axis so that the backrest is parallel to the wall (the passenger faces sideways with respect to the traveling direction of the vehicle) in the long state, and the backrest is perpendicular to the wall (the passenger faces the traveling direction or the reverse traveling direction of the vehicle) in the cross state. A long cross-switchable seat that can be switched is known.

[0003] Patent Document 1 describes a rotating seat device including a reclining mechanism for the backrest and a movement stop mechanism that makes the reclining mechanism inoperable so that the aisle width does not narrow when the seat faces the window side. The reclining mechanism uses frictional force, latch engagement, etc. The reclining operation part includes a reclining operation lever and an operation wire connected to the reclining operation lever. The movement stop mechanism includes a link swingably supported on the upper surface part of a movable base frame (base), and an interlocking wire and a mechanism wire connected to the link. The interlocking wire has its tip fixed to the base and is interlocked with the movable base. The mechanism wire is connected to the reclining mechanism. The operation wire is connected to the reclining mechanism via the link and the mechanism wire.

[0004] When the seat faces the traveling direction, if the reclining operation lever is operated to pull the operation wire, the lock of the reclining mechanism is released via the link and the mechanism wire, and reclining becomes possible. Also, when the seat faces the window side, the interlocking wire is pulled in conjunction with the movable base frame, the link is biased, and the operation wire cannot be pulled, so the reclining operation lever becomes inoperable and reclining cannot be performed.

[0005] Patent Document 2 describes a seating device equipped with a backrest reclining mechanism and a reclining operation lock mechanism that restricts reclining operation to prevent interference between the backrest and a wall when the seat is extended. The reclining mechanism uses a damper such as a gas spring, and the reclining operation part includes a housing incorporated into the front end of the armrest, a reclining operation lever supported by the housing, and an operation cable connecting the reclining operation lever to the reclining mechanism. The reclining operation lock mechanism includes a receiving member fixed to the back of the reclining operation lever, a substantially L-shaped link pivotably supported by the housing, a lock pin supported by the link and retractably fitted into the receiving member, a reclining lock cable connected to the link, a foot pedal having an engaging portion connected to the reclining lock cable, and an engaging portion provided at the front end of the footrest.

[0006] Then, in the cross position, the reclining operation lever can be operated to pull the operation cable, enabling reclining. Conversely, when switching to the long position, the engaged part engages with the engaged part, pulling the reclining lock cable, and the lock pin fits into the lock hole of the reclining operation lever, restraining the reclining operation lever and preventing it from being operated, thus preventing reclining. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Utility Model Publication No. 63-13947 (Japanese Utility Model Publication No. 58-188334) [Patent Document 2] Japanese Patent Publication No. 7051253 (Japanese Unexamined Patent Publication No. 2021-133182) [Overview of the project] [Problems that the invention aims to solve]

[0008] In the rotating seat device described in Patent Document 1, the movement-stopping mechanism is supported on the upper surface of the movable frame and is configured around a link, making it difficult to access when adjusting the mechanism and posing a problem in terms of maintainability.

[0009] In the seating device described in Patent Document 2, in addition to the usual operating cable, there are components such as a reclining lock cable, receiving member, link, and lock pin on the back of the armrest's reclining operation lever, which imposes constraints on the armrest. In other words, there are problems such as the difficulty of installing it on an armrest with limited space due to the large number of parts, the need to integrate it into a housing and unitize it, and the inability to use conventional armrests with reclining operation levers.

[0010] Therefore, the objective of the present invention is to make the locking mechanism that locks the backrest to prevent it from reclining in the long position easily accessible during adjustment, thereby improving maintainability, and also to avoid imposing any restrictions on the armrests. [Means for solving the problem]

[0011] [1] A seat comprising a frame and a seat, backrest and armrest attached to the frame, comprising a switching mechanism for switching between a long state in which the backrest is parallel to the wall of the vehicle and a cross state in which the backrest is perpendicular to the wall of the vehicle, a reclining mechanism for reclining the backrest, a reclining lock mechanism for locking the backrest so that it cannot be reclined in the long state, and a reclining lock release mechanism for releasing the lock, The reclining mechanism includes a fluid pressure cylinder located on the side of the frame and connected to the backrest. The reclining lock mechanism includes a first movable body disposed on the side of the frame and connected to a fluid pressure cylinder, and a reclining lock wire that locks the first movable body in the extended position. The reclining lock release mechanism includes the first movable body, a reclining operating body provided on the armrest, and a reclining operating wire connecting the reclining operating body and the first movable body. Features include a long / cross-type switchable seat.

[0012] [2] The reclining lock wire is connected to a slider that is slidably supported on the frame, A long / cross seat as described in [1], wherein the mechanism for sliding the slider when the seat is in the long position is provided on a base body located below the underframe.

[0013] [3] The switching mechanism comprises a rotation mechanism that enables the seat to rotate and a rotation lock mechanism that locks the rotation, A long / cross seat according to [1] or [2], which is provided with a rotation lock release mechanism for releasing the rotation lock.

[0014] [4] The long / cross switching seat according to [3], the rotation lock release mechanism includes a second movable body disposed on the side of the frame and a rotation lock release wire, one end of which is connected to the second movable body and the other end of which is connected to the seat's rotation lock release pedal.

[0015] [5] The first movable body and the second movable body are the long / cross type seats described in [4] which are adjacent to each other on the left and right sides and overlap front and back. [Effects of the Invention]

[0016] According to the present invention, the locking mechanism that prevents the backrest from reclining in the long position can be made more accessible during adjustment, improving maintainability, and also provides the excellent effect of not restricting the armrests. [Brief explanation of the drawing]

[0017] [Figure 1] Figure 1 shows the configuration of seats in an embodiment installed in a railway vehicle, where (a) is a plan view in the cross configuration, (b) is a plan view before reaching the long configuration, and (c) is a plan view in the long configuration. [Figure 2] Figure 2 shows the frame and lower part of the seat, with (a) being a plan view and (b) being a front view. [Figure 3] Figure 3(a) is a side view of FIG. 2, (b) is a cross-sectional view taken along line IIIb-IIIb of (a), and (c) is a partially enlarged view of (a). [Figure 4] Figure 4(a) is a partially enlarged view of FIG. 2, (b) is a front view of the first and second movable bodies, etc., and (c) is a cross-sectional view taken along line IVc-IVc of (b). [Figure 5] Figure 5(a) is a side view of the armrest of the seat, and (b) is a side view of the rotation lock release pedal. [Figure 6] Figure 6 is a diagram for explaining the operation of the reclining lock mechanism of the seat. [Figure 7] Figure 7 is a diagram for explaining the operations of the reclining mechanism, the reclining lock mechanism, the reclining lock release mechanism, and the rotation lock release mechanism of the seat.

Embodiments for Carrying out the Invention

[0018] 1. Seat The use of the seat is not particularly limited, and examples thereof include vehicle seats (seats for railway vehicles such as trains, buses, airplanes, ships, etc.), and hall seats (seats for theaters, indoor concert halls, movie theaters, assembly halls, etc.). The seat may be a single-seater or a multi-seater.

[0019] 2. Reclining Operating Body The reclining operating body is not particularly limited, and examples thereof include a lever, a push button, etc.

Examples

[0020] Next, embodiments embodying the present invention will be described with reference to FIGS. 1 to 7. However, the present invention is not limited to the embodiments, and the configurations and shapes of each part can be arbitrarily changed and implemented without departing from the gist of the invention.

[0021] Figure 1 shows railway car A. Inside railway car A, there are multiple two-seater long / cross-type seats (hereinafter simply referred to as "seat 1") in the right and left rows, with standing room and aisle space between the two rows. B represents the floor, and C represents the left and right walls.

[0022] As shown in Figures 1 to 5, the seat 1 comprises a fixed frame (not shown) fixed to the floor B, a base body 2 mounted on the fixed frame, a frame 3 supported on the base body 2, a switching mechanism 4 that allows the frame 3 to rotate around a vertical axis relative to the base body 2, two seat portions 5 including cushions mounted on the frame 3, two backrests 6 recliningly attached to the rear of the frame 3, and two armrests 7 attached to the left and right sides of the frame 3.

[0023] Seat 1 is rotatable by the switching mechanism 4, allowing it to be switched between a cross state, as shown in Figure 1(a), where the backrest 6 is perpendicular to the wall C (passengers face either the direction of travel or the opposite direction of travel), and a long state, as shown in Figure 1(c), where the backrest 6 is parallel to the wall C (passengers face sideways to the direction of travel). Before moving from (a) to (c), there is a state, as shown in (b), where the backrest 6 is slightly away from the wall C, and from this state, it can be moved laterally by the switching mechanism 4 to reach (c). The switching mechanism 4 comprises a rotation mechanism that enables the rotation, a rotation lock mechanism that locks the rotation, and a lateral sliding mechanism that enables lateral sliding. Since a known mechanism can be used for the switching mechanism 4, further details are omitted.

[0024] Furthermore, seat 1 includes a reclining mechanism 10 for reclining the backrest, a reclining lock mechanism 20 for locking the backrest so that it cannot be reclined in the long position, a reclining lock release mechanism 30 for releasing the reclining lock, and a rotation lock release mechanism 40 for releasing the rotation lock by the switching mechanism 4.

[0025] Since the main parts of the reclining mechanism 10 and the reclining lock mechanism 20 are located on the side of the frame 3, the auxiliary structures for their arrangement will be described first. A bracket 15 is fixed to the front of the side of the frame 3. A support 16 is attached to the side of the bracket 15 by an axle. A support 17, which is curved in side view, is fixed to the rear of the support 16.

[0026] [Reclining mechanism 10] The reclining mechanism 10 uses a fluid pressure cylinder 11 disposed on the side of the frame 3. The fluid pressure cylinder 11 consists of a cylinder tube 12 and a piston rod 13 that extends and retracts into it, and is equipped with a stepless stop mechanism that allows the extension and retraction to be stopped at any position. The base end of the cylinder tube 12 is connected to the lower end of the back frame 6a, which forms the framework of the backrest 6. The tip of the piston rod 13 is connected to the lower part of the support 16.

[0027] [Reclining lock mechanism 20] The reclining lock mechanism 20 includes a first movable body 21 that is pivotably attached to the lower part of the support 16 and acts on the fluid pressure cylinder 11; a reclining lock wire 25, one end of which is connected to the upper part of the first movable body 21 via a connector 22, and the other end of which is connected to a slider 24 that is slidably supported at the rear of the frame 3 by a slide guide 23; and an actuating body 26, for example, a boss-shaped one, which is erected at the rear of the base body 2 and pushes the slider 24 when extended. Therefore, the first movable body 21, which is the main part of the reclining lock mechanism 20, is disposed on the side of the frame 3. Near one end of the reclining lock wire 25, a curved guide 27 attached to the bracket 15 allows it to curve and slide toward the first movable body 21. The other end of the reclining lock wire 25 is connected to the slider 24 by a pin 28 erected on the slider 24, and the pin 28 is movable within a slit 29 formed in the base frame 3. When the actuator 26 pushes the slider 24, the slider 24 slides and the reclining lock wire 25 is pulled.

[0028] [Reclining lock release mechanism 30] The reclining lock release mechanism 30 includes the first movable body 21, a reclining operation lever 31 provided on the armrest 7, and a reclining operation wire 33, one end of which is connected to the upper part of the first movable body 21 via a connector 32, and the other end of which is connected to the reclining operation lever 31. The outer tube at one end of the reclining operation wire 33 is supported on the upper part of the support member 17.

[0029] [Rotation lock release mechanism 40] The rotational lock release mechanism 40 includes a second movable body 41 that is pivotably mounted to the lower part of the support body 16 and acts on the fluid pressure cylinder 11, a rotational lock release pedal 42 provided below the base body 2, and a rotational lock release wire 44, one end of which is connected to the upper part of the second movable body 41 via a connector 43 and the other end of which is connected to the rotational lock release pedal 42. The outer tube at one end of the rotational lock release wire 44 is supported on the upper part of the support member 17.

[0030] As shown in Figure 4, the first movable body 21 and the second movable body 41 are positioned adjacent to each other on the left and right, and overlap front to back (the first movable body 21 is in front, and the second movable body 41 is in back). When the first movable body 21 tilts backward, it pushes the second movable body 41, causing them to tilt backward together. When the second movable body 41 tilts backward, it tilts independently and does not cause the first movable body 21 to tilt.

[0031] [Operation] (1) Figure 7(a) shows the cross-back configuration, with the backrest 6 not reclined. In this case, as shown in Figure 6(a), the actuator 26 is not pressing the slider 24.

[0032] (2) As shown in Figure 7(b), when the reclining operation lever 31 is operated while the seats are in the same cross position, the first movable body 21 is pulled by the reclining operation wire 33 and tilted backward, and the first movable body 21 pushes the second movable body 41 backward, causing them to tilt backward together. This tilting of the first movable body 21 and the second movable body 41 releases the reclining lock of the fluid pressure cylinder 11, allowing the backrest 6 to be reclined as desired.

[0033] (3) To switch to the long position, when the rotation lock release pedal 42 is pressed, the rotation lock release wire 44 pulls the second movable body 41 and causes it to tilt backward. This tilting of the second movable body 41 releases the reclining lock of the fluid pressure cylinder 11, and if the backrest 6 was reclined, it returns to the upright position. At this time, the first movable body 21 does not tilt. Then, as shown in Figures 6(b) and 6(c), the actuator 26 pushes and slides the slider 24, so as shown in Figure 7(c), the first movable body 21 is pulled backward by the reclining lock wire 25 and tilts, preventing the reclining operation wire 33 from being pulled, making it impossible to operate the reclining operation lever 31, and thus preventing reclining. At this time, the second movable body 41 is not pulled by the first movable body 21.

[0034] In the long / cross-type seat of the embodiment configured as described above, the main parts of the reclining mechanism 10 and the reclining lock mechanism 20 are located on the side of the easily accessible base frame 3, making them easily accessible when adjusting these mechanisms and improving maintainability.

[0035] Furthermore, the back of the armrest's reclining lever only has the (usually present) operating cable, and there are no parts such as the reclining lock cable, receiving member, link, or lock pin as described in Patent Document 1, thus not imposing constraints on the armrest, which has limited space. Therefore, conventional armrests with reclining levers can be used, or it is easy to use new reclining levers or recline push buttons.

[0036] It should be noted that the present invention is not limited to the embodiments described above, and can be appropriately modified and implemented without departing from the spirit of the invention. [Explanation of Symbols]

[0037] 1 seat 2 Base 3-unit frame 4. Switching mechanism 5 Seat 6 Backrest 7 Armrest 10. Reclining mechanism 11 Fluid pressure cylinder 16 Support 17 Supports 20. Reclining lock mechanism 21 1st movable body 24 Sliders 25 Reclining Lock Wire 26 Effector 30. Reclining lock release mechanism 31. Reclining control lever 33 Reclining operation wire 40-rotation lock release mechanism 41 Second movable body 42 Rotation Lock Release Pedal 44 Rotation Unlock Wire A Railway vehicle B floor C wall

Claims

1. A seat comprising a frame and a seat, backrest, and armrest attached to the frame, is equipped with a switching mechanism that switches between a long position where the backrest is parallel to the wall of the vehicle and a cross position where the backrest is perpendicular to the wall of the vehicle, a reclining mechanism for reclining the backrest, a reclining lock mechanism for locking the backrest to prevent it from reclining in the long position, and a reclining lock release mechanism for releasing the lock, The reclining mechanism includes a fluid pressure cylinder located on the side of the frame and connected to the backrest. The reclining lock mechanism includes a first movable body disposed on the side of the frame and connected to a fluid pressure cylinder, and a reclining lock wire that locks the first movable body in the extended position. The reclining lock release mechanism includes the first movable body, a reclining operating body provided on the armrest, and a reclining operating wire connecting the reclining operating body and the first movable body. Features include a long / cross-type switchable seat.

2. The reclining lock wire is connected to a slider that is slidably supported on the frame. The long / cross switchable seat according to claim 1, wherein the mechanism for sliding the slider when the seat is in the long position is provided on a base body located below the underframe.

3. The switching mechanism includes a rotation mechanism that enables the seat to rotate, and a rotation lock mechanism that locks the rotation. A long / cross-type seat according to claim 1 or 2, further comprising a rotation lock release mechanism for releasing the rotation lock.

4. The long / cross switching seat according to claim 3, wherein the rotation lock release mechanism includes a second movable body disposed on the side of the frame and a rotation lock release wire, one end of which is connected to the second movable body and the other end of which is connected to the seat's rotation lock release pedal.

5. The first movable body and the second movable body are arranged adjacent to each other on the left and right sides and overlapping front and back, as described in claim 4, for the long / cross type seat.

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