JP2018052289A - Auxiliary seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an auxiliary seat which enables an occupant to smoothly get on/off a vehicle and is automatically set in getting on/off the vehicle.SOLUTION: An auxiliary seat includes: at least one support post fixed on a vehicle body; a first seating surface 11 supported by the support post to have a height approximately the same as a seating surface of a vehicle seat; at least one parallel four-bar linkage mechanism 23 which has two movable joints 29 and two fixed joints 27, that are fixed immediately below the first seating surface 11, and oscillates between the vehicle seat and an entrance; and a second seating surface 21 provided on the side of the movable joint 29 of the parallel four-bar linkage mechanism 23. The parallel four-bar linkage mechanism 23 superposes the second seating surface 21 on the first seating surface 11 in a position where a pair of shafts having the movable joint 29 and the fixed joint 27 are upright, and has a degree of freedom of zero when the pair of the shafts are inclined in a direction of the entrance so that the second seating surface 21 and the first seating surface 11 have approximately the same height.SELECTED DRAWING: Figure 1A

Description

  The present invention relates to an auxiliary seat that is provided in a gap between a vehicle seat and a boarding / exiting opening and assists a passenger to get on and off.

  Conventionally, a normal automobile has a specification in which an occupant bends and sits down on a vehicle seat when the occupant gets on and off the vehicle. However, for those who have difficulty in walking or who have weak legs, such a specification has a heavy burden on the body, and it is difficult to smoothly get on and off the vehicle. Under such circumstances, an auxiliary sheet that has a simple structure and can be easily attached is desired.

  In Cited Document 1, an auxiliary seat is provided outside the vehicle width direction of the vehicle seat, and when the passenger gets in and out of the vehicle, the passenger seats the auxiliary seat on the door side so that the auxiliary seat is deployed outside the vehicle. The technology is described. According to this technology, when the vehicle gets on and off the vehicle, the auxiliary seat is provided so as to protrude outside the vehicle, so that the vehicle can be smoothly boarded and boarded, and there is no need to bend and get on and off. Therefore, it is possible to comfortably get on and off the vehicle for people who have difficulty in walking or who have weak feet.

JP 11-151959 A

  However, in the cited document 1, every time when getting on and off the vehicle, the occupant has to defeat and raise the auxiliary seat himself, which is troublesome. In addition, when the occupant is using a wheelchair, it is necessary to remove the wheelchair between the outside of the vehicle and the rear seat after getting on and before getting off. When the wheelchair is taken in and out after getting into the vehicle or before getting out of the vehicle, if there is an auxiliary seat folded next to the vehicle seat, the wheelchair may be put in and out. In addition, when the auxiliary seat is in the unfolded state, it is inconvenient because the wheelchair cannot be expanded or folded right next to the seated vehicle seat.

  In addition, there is a technique of rotating the vehicle seat itself outward in the vehicle width direction and sliding it to the outside of the vehicle in order to realize smooth getting on and off the passenger car, but the configuration is complicated and the installation cost is high. Further, since the vehicle seat itself is slid out of the vehicle, it is necessary to secure a certain amount of boarding / exiting space outside the vehicle when getting on and off.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide an auxiliary seat that can smoothly get on and off a passenger car and that is automatically installed when the passenger car gets on and off.

  (1) In order to achieve the above object, the present invention takes the following measures. That is, the auxiliary seat according to the present invention is an auxiliary seat that is provided in the gap between the vehicle seat and the entrance / exit, and assists the passenger to get on / off, and is fixed to the vehicle body in the gap between the vehicle seat and the entrance / exit. And at least one support, a first seat supported by the support so as to have substantially the same height as the seat of the vehicle seat, two movable joints, and two fixed joints, At least one parallel four-bar linkage mechanism in which the fixed joint is fixed immediately below the first seat surface and swings between the vehicle seat and the entrance / exit, and the movable joint of the parallel four-bar link mechanism A second seating surface provided on the side, wherein the parallel four-bar linkage mechanism moves the second seating surface at a position where a pair of shafts having the movable joint and the fixed joint stand upright. The one set is stacked on the seating surface of 1 Axis inclined to the entrance direction, the degree of freedom at a position where said second bearing surface is the first seat and substantially the same height, characterized in that the zero.

  As described above, the auxiliary seat according to the present invention is an auxiliary seat that is provided in the gap between the vehicle seat and the entrance and exit, and assists the passenger in getting on and off, and is fixed to the vehicle body in the gap between the vehicle seat and the entrance and exit. And at least one support, a first seat supported by the support so as to be substantially the same height as the seat of the vehicle seat, two movable joints, and two fixed joints, A fixed joint is fixed immediately below the seating surface, and at least one parallel four-bar linkage mechanism that swings between the vehicle seat and the entrance / exit, and a second joint provided on the movable joint side of the parallel four-bar link mechanism. And the seating surface, the second seating surface can be swung by its own weight simply by opening the vehicle door. Moreover, the parallel four-bar linkage mechanism stacks the second seating surface on the first seating surface at a position where a pair of shafts having a movable joint and a fixed joint stand upright. Even a narrow space such as a gap between the seat and the entrance / exit can be stored compactly. Since the heights of the first seat surface and the second seat surface during storage are substantially the same as the height of the seat surface of the vehicle seat, the driver's driving operation is not hindered. On the other hand, the auxiliary seat has a set of shafts inclined in the entrance / exit direction, and the second seating surface has substantially the same height as the first seating surface. When in use, that is, when the passenger car gets in and out, the second seat surface projects out of the vehicle by its own weight, and the second seat surface and the first seat surface are approximately at the same height. Surface can be installed. As a result, the passenger can smoothly get on and off the passenger car. By using the parallel four-bar linkage mechanism, a power source such as an electric motor or a hydraulic actuator is not required, and a simple structure can be adopted, thereby reducing installation costs.

  (2) Moreover, the auxiliary seat | sheet of this invention is further provided with the stopper which controls that it inclines in the said vehicle seat direction from the position where the said one set of shaft erects.

  As described above, since the stopper that restricts the inclination of the set of shafts in the vehicle seat direction from the upright position is provided, the second seating surface can be stored at the upright position of the set of shafts.

  (3) Moreover, the auxiliary seat | sheet of this invention is further provided with the urging means which urges | biases at least one of the said 2nd seat surface or the said one set of axis | shafts in the said entrance / exit direction.

  Thus, since at least one of the second seat surface or the pair of shafts is urged in the entrance / exit direction, the parallel four-bar linkage mechanism and the second seat surface are prevented from being inclined toward the vehicle seat.

  According to the present invention, it is possible to smoothly get on and off a passenger car, and to provide an auxiliary seat that is automatically installed when the passenger car gets on and off.

It is a perspective view which shows the state (at the time of accommodation) of the auxiliary sheet which concerns on this embodiment. It is a front view which shows the state (at the time of accommodation) of the auxiliary sheet which concerns on this embodiment. It is a side view which shows the state (at the time of accommodation) of the auxiliary sheet which concerns on this embodiment. It is sectional drawing in 1d-1d of FIG. 1B. It is a perspective view which shows the state (in the middle of a change) of the auxiliary sheet which concerns on this embodiment. It is a front view which shows the state (in the middle of a change) of the auxiliary sheet which concerns on this embodiment. It is a side view which shows the state (in the middle of change) of the auxiliary sheet which concerns on this embodiment. It is sectional drawing in 2d-2d of FIG. 2B. It is a perspective view which shows the state (at the time of use) of the auxiliary sheet which concerns on this embodiment. It is a front view which shows the state (at the time of use) of the auxiliary seat which concerns on this embodiment. It is a side view which shows the state (at the time of use) of the auxiliary sheet which concerns on this embodiment. It is sectional drawing in 3d-3d of FIG. 3B. It is the figure which showed the structure (at the time of accommodation) of a parallel four-bar linkage mechanism. It is the figure which showed the structure (in the middle of change) of a parallel four-bar linkage mechanism. It is the figure which showed the structure (at the time of use) of a parallel four-bar linkage mechanism. It is a perspective view which shows the usage example of the auxiliary sheet | seat which concerns on this embodiment. It is a perspective view which shows the usage example of the auxiliary sheet | seat which concerns on this embodiment. It is a front view which shows the usage example of the auxiliary sheet which concerns on this embodiment. It is a front view which shows the usage example of the auxiliary sheet which concerns on this embodiment.

Embodiments of the present invention will be described with reference to the drawings.
[1. Configuration of auxiliary sheet]
1A to 1D show a state when the auxiliary sheet 100 according to the present embodiment is stored, and FIGS. 2A to 2D show a state during transition from the storage time of the auxiliary sheet 100 according to the present embodiment to the use state. FIG. 3A to FIG. 3D are diagrams illustrating states during use of the auxiliary sheet 100 according to the present embodiment.

  1A to 1C are a perspective view, a front view, and a side view, respectively, showing a state when the auxiliary sheet 100 according to the present embodiment is stored. 1D is a cross-sectional view taken along 1d-1d of FIG. 1B.

  2A to 2C are a perspective view, a front view, and a side view, respectively, illustrating a state in which the auxiliary sheet 100 according to the present embodiment is in the middle of transition from storage to use or from use to storage. 2D is a cross-sectional view taken along 2d-2d in FIG. 2A.

  3A to 3C are a perspective view, a front view, and a side view, respectively, showing a state in use of the auxiliary sheet 100 according to the present embodiment. 3D is a cross-sectional view taken along 3d-3d in FIG. 3B.

  As shown in FIGS. 1A to 1D, 2A to 2D, and 3A to 3D, the auxiliary seat 100 according to the present embodiment is provided in the gap between the vehicle seat and the entrance / exit, and is below the paper surface. A first seat surface 11 provided on a support base 13 formed in a U-shape that opens toward the front and a second seat surface 21 supported by two parallel four-bar linkage mechanisms 23 are provided. The second seat surface 21 includes an upper surface portion 21a and a side surface portion 21b perpendicular to the upper surface portion, and is connected to the parallel four-bar linkage mechanism 23 via a bracket 31 and a movable joint 29 as a connection pin. . The support base 13 is provided with a stopper 15 that restricts the second seat surface 21 from inclining toward the vehicle seat. The second seat surface 21 is provided with a biasing means 25 that biases the second seat surface 21 so as to incline in the entrance / exit direction. The support base 13 and the parallel four-bar linkage mechanism 23 are connected to the flat plate 41 via a bracket 31 and a fixed joint 27 as a connection pin. The flat plate 41 is fixed to the vehicle body. A bush 33 is provided between the parallel four-bar linkage mechanism 23 and the support base 13. By providing the bush 33, the bracket 31 and the parallel four-bar linkage mechanism 23 can be prevented from wobbling in the vehicle front-rear direction. The first seat surface 11 may be supported by at least one support column instead of the support base 13. Moreover, although it is preferable to provide two parallel four-joint link mechanisms 23 which support the 2nd seat surface 21, one may be sufficient and three or more may be sufficient.

  Here, the structure of the parallel four-bar linkage mechanism 23 will be described. The parallel four-bar linkage mechanism 23 includes four joints including two fixed joints 27 (27a and 27b) and two movable joints 29 (29a and 29b), and two sets of opposed shafts. Hereinafter, with respect to two sets of opposing axes, the axis parallel to the vertical direction at a position where the angle between adjacent axes is a right angle is referred to as the vertical axis 23a, 23b, and the axis perpendicular to the vertical axis 23a, 23b. Called the horizontal axis. In the auxiliary seat according to the present embodiment, the bracket 31 used for connection with the second seating surface 21 and the flat plate 41 plays a role of a horizontal axis.

  Each end of the vertical axes 23a and 23b is connected to the movable joint 29 (29a and 29b) and the fixed joint 27 (27a and 27b), respectively. Further, of the two horizontal axes (bracket 31), both ends of one horizontal axis (bracket 31) are connected to two movable joints 29 (29a, 29b), respectively, and the other horizontal axis (bracket 31) is connected. Both ends are connected to two fixed joints 27 (27a, 27b), respectively. The parallel four-joint link mechanism 23 configured in this way swings to the left and right with the pair of opposing longitudinal axes 23 (23a, 23b) at the same angle with the two fixed joints 27 (27a, 27b) as axes. To do. Further, the horizontal axis (bracket 31) connected to the movable joint 29 (29a, 29b) follows the vertical axes 23a, 23b while maintaining the horizontal state. In the auxiliary seat according to the present embodiment, the rotation axis of the movable joint 29 (29a, 29b) plays a role of a connecting pin that connects the second seating surface 21 and the parallel four-bar linkage mechanism 23, In addition, the rotation shaft of the fixed joint 27 (27a, 27b) plays a role of a connecting pin that connects the support base 13 and the parallel four-bar linkage mechanism 23.

  Therefore, in the auxiliary seat 100 according to the present embodiment, the second seat surface 21 is provided on the movable joint 29 (29a, 29b) side of the parallel four-bar linkage mechanism 23, and the second seat surface 21 is the upper surface. For example, it can swing in the left-right direction (vehicle width direction) in FIG. 2C while keeping the portion 21a horizontal.

[2. Operation of auxiliary sheet]
The operation of the auxiliary sheet 100 according to this embodiment will be described. First, as shown in FIG. 1D, when the auxiliary seat 100 is stored, a force is applied to the side surface portion 21b of the second seat surface 21 in a direction in which the vertical axes 23a and 23b stand upright from the entrance / exit side by the vehicle door. As a result, the second seating surface 21 moves directly above the first seating surface 11. When the second seating surface 21 moves directly above the first seating surface 11, the stopper 15 and the urging means 25 come into contact with each other, whereby the second seating surface 21 is inclined toward the vehicle seat side. regulate. As a result, a structure in which a pair of shafts (vertical axes) 23a and 23b of the parallel four-bar linkage mechanism 23 stands upright, that is, a structure in which the second seat surface 21 is stacked immediately above the first seat surface 11 is adopted. . As described above, since the second seat surface 21 is stacked on the first seat surface 11 when the vehicle door is closed, the auxiliary seat 100 is stored compactly even in a narrow space. be able to. In the auxiliary sheet according to the present embodiment, the stopper 15 is provided on the support base 13, but is not limited thereto. The second seating surface 21 may be provided on the first seating surface 11 as long as the second seating surface 21 can be prevented from tilting toward the vehicle seat. For example, the second seating surface 21 or the parallel four-bar link The mechanism 23 may be provided.

  Next, as shown in FIG. 2D, the auxiliary seat 100 is energized at the same time when the door of the vehicle is opened and the force on the side surface portion 21b of the second seat surface 21 from the entrance / exit side is released. Due to the elastic force of the means 25, the center of gravity of the second seating surface 21 moves toward the entrance / exit, and the second seating surface 21 swings toward the entrance / exit due to its own weight.

  In the auxiliary seat according to the present embodiment, the urging means 25 is provided on the second seat surface 21 so as to contact the stopper 15, but is not limited thereto. If it is provided at a position where the center of gravity of the second seat surface 21 can be moved toward the entrance / exit, it does not need to be a position where it comes into contact with the stopper 15 during storage. Moreover, although the urging | biasing means 25 may be provided in the 2nd seat surface 21 like the auxiliary seat which concerns on this embodiment, it is not limited to this. For example, it may be provided on the parallel four-bar linkage mechanism 23 or may be provided on the first seat surface 11 or the support base 13.

  Next, as shown in FIG. 3D, when the auxiliary seat 100 is used, the second seat surface 21 is inclined to the same height as the first seat surface 11, and one set of the parallel four-bar linkage mechanism 23. The shafts (vertical axes 23a and 23b) come into contact with each other and stop. In this way, the auxiliary seat 100 can be automatically deployed and shifted to a use state simply by opening the vehicle door.

  Here, the relationship between a pair of axes (vertical axes 23a and 23b) having the movable joint 29 and the fixed joint 27 of the parallel four-bar linkage mechanism 23, the axis interval, and the degree of freedom will be described with reference to FIGS. 4A and 4B. .

  As shown in FIG. 4A, the width of each vertical axis 23a, 23b is w, the distance between the vertical axis centers in the horizontal direction with respect to the paper surface is d, and the distance between the center points of the two fixed joints (two vertical axes). (1) is established, where D is the distance between the symmetry axes of D and d is the angle between D and d.

d = D cos θ−W (1)
Width of vertical axis = w, distance between vertical axis centers in the horizontal direction with respect to the paper surface = d,
The distance between the center points of the two fixed joints (the distance between the symmetry axes of the two vertical axes) = D,
Angle between D and d: θ

  That is, a pair of axes (vertical axes 23a and 23b) having a movable joint and a fixed joint of the parallel four-bar linkage mechanism have a predetermined interval (d) when standing upright. As shown in FIG. 4B, when it begins to incline in the direction of the lift, the interval (d) gradually decreases. Then, as shown in FIG. 4C, there is no gap at the position where the second seating surface is substantially the same height as the first seating surface (d = 0), and they come into contact with each other. As a result, the degree of freedom of the parallel four-bar link mechanism becomes zero, and the parallel four-bar link mechanism cannot swing further. Thereby, a 2nd seat surface can be fixed in the position used as the substantially same height as a 1st seat surface.

[3. Example of use of auxiliary sheet]
5A and 5B are perspective views schematically showing a state in which the auxiliary seat 100 according to the present embodiment is provided in the gap between the vehicle seat 51 and the entrance / exit. 6A and 6B are front views schematically showing a state in which the auxiliary seat 100 according to the present embodiment is provided in the gap between the vehicle seat 51 and the entrance / exit. As shown in FIGS. 5A, 5B, 6A, and 6B, the auxiliary seat 100 according to the present embodiment is installed in a gap between the vehicle seat 51 and the entrance / exit. The support base that supports the first seat surface and the parallel four-bar linkage mechanism that supports the second seat surface may be directly fixed to the vehicle main body 71 instead of on a flat plate.

  As shown in FIGS. 5A, 5B, 6A, and 6B, the side surface portion of the second seating surface is provided so as to be on the entrance / exit side. When the closing operation of the door 61 is performed by the occupant, a force is applied from the door 61 to the side surface portion of the second seat surface 21 in the vehicle seat direction, and the second seat surface 21 becomes the first seat surface 11. Move directly above. On the vehicle seat side, the second seat surface 21 that has moved directly above the first seat surface 11 is restricted from inclining toward the vehicle seat 51 side by a stopper provided on the support base. . On the other hand, on the entrance / exit side, the door 61 restricts the second seat surface 21 from inclining toward the entrance / exit. As a result, as shown in FIG. 6A, the second seat surface 21 is accommodated by the door 61 and the stopper at a position where the vertical link stands upright. Since the height of the second seating surface 21 during storage is substantially the same as the height of the seating surface of the vehicle seat 51, it does not hinder the operation of the occupant. Note that the side surface portion of the second seat surface 21 may be formed of a member having a cushioning property that softens an impact received from the door 61 when the door 61 is closed.

  On the other hand, when the opening operation of the door 61 is performed by the passenger, the door 61 that restricts the inclination of the second seat surface 21 on the entrance / exit side is released, and at the same time, the door 61 provided on the second seat surface 21 is attached. The biasing means pushes a stopper provided on the support base. As a result, the center of gravity of the second seating surface 21 moves toward the entrance / exit, and the second seating surface 21 remains horizontal due to its own weight until the degree of freedom of the parallel four-bar linkage mechanism becomes zero. Swing. The position where the degree of freedom of the parallel four-bar linkage mechanism is 0 is a position where the second seat surface 21 and the first seat surface 11 are substantially the same height. As shown in FIG. 6B, the heights of the first seat surface 11 and the second seat surface 21 are substantially the same as the height of the seat surface of the vehicle seat 51, and therefore assists from the vehicle seat 51 when the passenger gets on and off. The movement from the seat 100 or the auxiliary seat 100 to the vehicle seat 51 can be performed smoothly. Further, when in use, the second seat surface 21 protrudes to the outside of the entrance / exit, so that the occupant does not need to get on and off the vehicle while bending down, and stands outside the vehicle without worrying about the entrance / exit. Can sit and sit.

  In this embodiment, although the auxiliary seat comprised from two seat surfaces, a 1st seat surface and a 2nd seat surface, was demonstrated, it is not limited to this. For example, a triple structure composed of three seating surfaces may be used.

  As described above, according to the present embodiment, passenger cars can be boarded and exited smoothly, and an auxiliary seat that is automatically installed when a passenger car gets in and out can be provided.

100 Auxiliary sheet 11 First seat surface 13 Support base 15 Stopper 21 Second seat surface 21a Upper surface portion 21b Side surface portion 23 Parallel four-bar linkage mechanism 23a, 23b Vertical axis 25 Biasing means 27, 27a, 27b Fixed joint 29, 29a, 29b Movable joint 31 Bracket 33 Bush 41 Flat plate 51 Vehicle seat 61 Door 71 Vehicle main body

Claims (3)

An auxiliary seat that is provided in the gap between the vehicle seat and the entrance and exit, and assists the passenger in getting on and off,
At least one strut fixed to a vehicle body in a gap between the vehicle seat and the entrance / exit;
A first seating surface supported by the column so as to be approximately the same height as the seating surface of the vehicle seat;
At least one parallel four-joint having two movable joints and two fixed joints, wherein the fixed joint is fixed immediately below the first seating surface, and swings between the vehicle seat and the entrance / exit A link mechanism;
A second seating surface provided on the movable joint side of the parallel four-bar linkage mechanism,
The parallel four-bar linkage mechanism stacks the second seating surface on the first seating surface at a position where the pair of shafts having the movable joint and the fixed joint stand upright, while the pair of shafts The auxiliary seat has a degree of freedom of 0 at a position where the second seating surface is inclined at the same height as the first seating surface.   The auxiliary seat according to claim 1, further comprising a stopper that restricts the set of shafts from inclining in the vehicle seat direction from the upright position. The auxiliary seat according to claim 1 or 2, further comprising a biasing unit that biases at least one of the second seat surface or the set of shafts in the direction of the entrance.

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