JPH10314231A - Traveling vehicle with seat position holding mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a traveling vehicle having a seat position holding mechanism, capable of securing space near the feet of the driver when ascending a hill or the like while keeping the position of the seat low. SOLUTION: A wheelchair 10 includes a vehicle body 11, a rail 12, and a seat 13, and can hold the position of the seat 13. The rail 12 has a front rail part 12a, a rear rail part 12c, and a center rail part 12b and is secured to the vehicle body 11. The front and rear rail parts 12a, 12c are circular. The center rail part 12b is rectilinear. The seat 13 moves along the rail 12 according to the inclination of the vehicle body 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling vehicle,
Slope, stairs, escalator, etc. (hereinafter referred to as slope, etc.)
The present invention relates to a traveling vehicle having a seat attitude holding mechanism that holds a seat attitude when ascending and descending on an inclined road surface.

[0002]

2. Description of the Related Art In a traveling vehicle, for example, an electric wheelchair, even when the vehicle body is tilted along a slope such as a sloping road when ascending or descending the sloping road, the driver's seat is not balanced. It is desirable to stay level to maintain sensation and remove fear.

[0003] As a mechanism for keeping the seat horizontal with respect to the inclination of the vehicle body, it is conceivable to use a horizontal holding mechanism conventionally used in a luggage carrier. As shown in FIG. 5, the horizontal holding mechanism of the luggage carrier includes a vehicle body 91, an arc-shaped rail 92, and a luggage stand 93 that moves on the rail 92 in accordance with the inclination. When the luggage carrier 90 having the horizontal holding mechanism climbs or descends on the slope 95, as shown in FIGS.
Is controlled to maintain a horizontal state, and the luggage stand 93 moves on the rail 92.

[0004]

When the horizontal holding mechanism of a luggage carrier as described above is diverted to a wheelchair as it is, a wheelchair 80 having a vehicle body 81, rails 82 and seats 83 is provided.
(See FIG. 8). FIG. 9 shows a state where such a wheelchair 80 climbs a slope or the like. Here, the seat 83 has been moved to the front part of the rail 82 so as to keep the seat 83 horizontal. However, the wheelchair 8 shown in FIGS.
At the size of 0, the front part of the body near the driver's feet,
For example, the axle of the front wheel is located, and the driver's feet must be bent for safety.

In order to avoid such a situation and secure a space below the driver's feet, it is conceivable to lengthen the dimension of the rail in the traveling direction or arrange the rail in front of the vehicle body. However, when the dimension of the rail in the traveling direction is increased (see the wheelchair 70 in FIG. 10), the height H3 from the ground 75 to the seat 73 is increased because the rail 72 has an arc shape.
Becomes large, the driver's getting on and off is deteriorated, and the position of the center of gravity of the wheelchair 70 becomes high, and the wheelchair 70 becomes unstable.

Also, as in a wheelchair 60 shown in FIG.
When the rail 62 is disposed in front of the vehicle body 61, the composite center of gravity A2 of the vehicle body 61 and the rail 62 and the composite center of gravity B2 of the seat 63 and the driver are shifted in the traveling direction, and the weight applied to the front and rear wheels becomes unbalanced or the vehicle body There is a problem that extra stress acts on 61. An object of the present invention is to provide a traveling vehicle having a seat attitude holding mechanism that can secure a space near the driver's feet when climbing a slope or the like while keeping the position of a seat low.

[0007]

According to a first aspect of the present invention, there is provided a traveling vehicle having a vehicle body, a seat support, and a seat, and capable of holding a seat. The seat support has a first support and a second support, and is fixed to the vehicle body. The first support has an arc shape. The second support portion has an arc shape having a larger curvature than the arc shape of the first support portion, or a straight shape. The seat is
It moves along the seat support according to the inclination of the vehicle body.

Here, even when the running vehicle climbs up a slope or the like and the vehicle body is inclined with respect to a horizontal plane, the seat may move along the seat supporting portion to keep the seat in a horizontal position. it can. The seat support section includes a first support section for providing a horizontal plane to the seat with respect to an arbitrary inclination of the vehicle body in a predetermined range, and a first support section for adjusting a position in a traveling direction of the seat, that is, a front and rear position. And two supporting portions. Due to the presence of the second support portion, it is possible to adjust the horizontal position of the seat along the seat support portion in the front-rear direction so as to secure a space near the feet of the driver of the traveling vehicle.

Further, since the second support portion has an arc shape having a curvature larger than the arc shape curvature of the first support portion or a linear shape, all of the seat support portions have an arc shape having a constant diameter. The highest point of the height of the seat support portion when the traveling vehicle travels on a flat ground (horizontal surface) can be kept low as compared with the case where only the first support portion is used. That is, the position of the seat is kept low.

As described above, in the traveling vehicle according to the present invention, it is possible to secure a space near the driver's feet when climbing a hill or the like while keeping the position of the seat low. A traveling vehicle according to a second aspect is the traveling vehicle according to the first aspect, wherein a front portion and a rear portion of the seat support portion with respect to a traveling direction of the traveling vehicle are first support portions. The portion of the seat support between the first support at the front and the first support at the rear with respect to the traveling direction of the traveling vehicle is the second support.

[0011] In the traveling vehicle according to the present invention, when traveling on level ground, the seat is in the second position near the center of the seat support.
On the support. That is, the center of gravity of the seat including the driver and the center of gravity of the vehicle body and the seat support portion can be set so as to substantially coincide with the traveling direction. When the traveling vehicle goes up a slope or the like, the seat moves to the first support portion in front of the seat support portion, and when the traveling vehicle goes down the slope or the like, the seat moves to the first support portion in the rear portion of the seat support portion.

In this case, the seat support portion is configured such that the second support portion is disposed between the first support portions provided before and after. Therefore, as compared with a structure in which the second support portion is not provided, the first support portion in the front portion of the seat support portion can be disposed more forward with respect to the vehicle body. This allows
When the traveling vehicle climbs a hill or the like, the feet of the driver sitting on the seat moved to the first support portion in front of the traveling vehicle can be brought forward before the front part of the vehicle body.

[0013] Further, since the second support portion having an arc shape having a curvature larger than that of the arc shape of the first support portion or a straight line shape is sandwiched between the first support portions, the seat support portion is formed. In addition, the difference between the highest point and the lowest point of the height of the seat support portion when the traveling vehicle is traveling on level ground is small. For this reason, the center of gravity of the seat support portion including the driver and the center of gravity of the entire running vehicle can be kept low, and the running stability of the running vehicle is improved.

[0014]

FIG. 1 is a schematic diagram of a wheelchair 10, which is a traveling vehicle according to an embodiment of the present invention. The wheelchair 10 is an electric wheelchair that is operated by the operation of the driver 1 (see FIGS. 2 and 3), and mainly includes a vehicle body 11.
And a rail 12 fixed to the vehicle body 11, and a seat 13 movable along the rail 12.

The vehicle body 11 is mainly composed of a vehicle body 11a.
And a front wheel portion 11b and a rear wheel portion 11c supported by a front portion and a rear portion of the vehicle body 11a. The vehicle body 11a is provided with a steering mechanism (not shown).
Steering is possible. Front wheel portion 11b and rear wheel portion 1
1c is driven by a drive motor (not shown) provided on the vehicle body 11a. The vehicle body 11a is provided with an inclinometer for measuring the inclination of the vehicle body 11.

The rails (seat support portions) 12 are arranged one by one on the left and right sides. An arc-shaped front rail portion (first support portion) 12a and a linear center rail portion (second support portion) 12b. And an arc-shaped rear rail portion (first support portion)
12c. The front rail portion 12a
This is a portion of the rail 12 that is forward with respect to the traveling direction D of the wheelchair 10 (to the right in FIG. 1). Rear rail 12c
Is a rear portion of the rail 12 with respect to the traveling direction D of the wheelchair 10 (to the right in FIG. 1). Central rail part 1
2b is a central portion of the rail 12 with respect to the traveling direction D of the wheelchair 10, and connects the front rail portion 12a and the rear rail portion 12c. The rail 12
Is fixed to the vehicle body 11a via the rail support 14.

The seat 13 is controlled so as to be kept horizontal in accordance with the inclination of the vehicle body 11a measured by the inclinometer. The seat 13 has a seat body 13a on which the driver 1 sits, and a moving unit 13b. , A drive unit and a control unit (not shown). An operation panel (not shown) arranged at a position where the driver 1 can operate is fixed to the seat 13. The operation panel is provided with a lever for steering operation, a main switch, a lever for controlling traveling speed, a brake switch, a display unit, other switches, and the like. The moving unit 13b includes a seat body 13a.
, And a tire in contact with the rail 12 is rotatably supported at a lower portion. That is, the moving unit 13
b can move along the rail 12 via the tire. The moving unit 13b and the movement of the seat body 13a fixed on the moving unit 13b along the rail 12 are performed by a driving device, and the driving device is controlled by the control unit. The control unit controls the vehicle body 11 from the inclinometer.
Based on the inclination data of a, the position on the rail 12 where the moving unit 13b should be located in order to keep the seat body 13a horizontal is determined, and a command corresponding to this is issued to the driving device.

Next, running of the wheelchair 10 will be described. As shown in FIG. 1, when traveling on the flat ground 15a, the seat 13 is located on the central rail portion 12b. Here, the combined center of gravity A1 of the vehicle body 11, the rail 12, and the rail support portion 14 substantially coincides with the combined center of gravity B1 of the seat 13 and the driver 1 in the traveling direction. Therefore, the weight applied to the front and rear wheels is substantially equal, and the balance of the entire wheelchair 10 and the stability of the wheelchair 10 are good.

As shown in FIG. 2, when ascending a gentle slope 15b, the seat 13 moves to a position near the center rail portion 12b of the front rail portion 12a. As described above, by using the curved surface of the arc-shaped front rail portion 12a,
The seat 13 is held horizontally. At this time, as is clear from FIG. 2, the position of the driver's foot and the front wheel portion 11b
And a predetermined distance is secured between them.

As shown in FIG. 3, when climbing a steep slope 15c or climbing a stair or an escalator, the seat 13 moves to a position further forward of the front rail portion 12a. Here, as is clear from FIG. 3, a predetermined distance is secured between the position under the driver's foot and the front wheel portion 11b. As described above, by inserting the center rail portion 12b between the front rail portion 12a and the rear rail portion 12c, the space near the foot of the driver 1 when the wheelchair 10 climbs the slope 15b or the slope 15c is reduced. Secured.
That is, as compared with a structure in which the center rail portion 12b does not exist, the front rail portion 12a can be disposed more forward with respect to the vehicle body 11, so that a space near the foot of the driver 1 is secured.

On the other hand, the central rail portion 12b having a linear shape
Is configured to be sandwiched between the front and rear rail portions 12a and 12c, so that the wheelchair 10 travels on the flat ground 15a as compared to a rail configuration in which a linear shape is arranged at both ends of an arc shape. Rail 12 when it is
The difference between the height H1 of the highest point and the height H2 of the lowest point (H1-
H2) is small. For this reason, the center of gravity of the seat 13 including the driver 1 and the center of gravity of the entire wheelchair 10 are kept low, and the running stability of the wheelchair 10 is improved. Also,
In the configuration of the rail of the present embodiment, the wheelchair 7 shown in FIG.
Since the height H1 of the highest point of the rail 12 is suppressed to be lower than 0, the position of the seat 13 is lowered, and the getting on and off of the driver 1 is improved.

As shown in FIG. 4, when descending the slope 15d, the seat 13 moves on the rear rail portion 12c. Thus, the seat 13 is held horizontally by using the curved surface of the arc-shaped rear rail portion 12c.

[0023]

According to the present invention, an arc-shaped first support portion,
By configuring the seat support portion from an arc-shaped or straight-line shaped second support portion having a curvature larger than the arc-shaped curvature of the first support portion, it is possible to reduce the position of the seat when climbing a slope or the like. Space near the driver's feet can be secured.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a wheelchair according to an embodiment of the present invention.

FIG. 2 is a schematic view of a state of a wheelchair according to an embodiment of the present invention.

FIG. 3 is a schematic diagram of a state of a wheelchair according to an embodiment of the present invention.

FIG. 4 is a schematic view of a state of a wheelchair according to an embodiment of the present invention.

FIG. 5 is a schematic side view of a luggage carrier.

FIG. 6 is a schematic diagram of a state of a luggage carrier.

FIG. 7 is a schematic diagram of a state of a luggage carrier.

FIG. 8 is a schematic side view of a wheelchair.

FIG. 9 is a schematic diagram of a state of a wheelchair.

FIG. 10 is a schematic side view of a wheelchair.

FIG. 11 is a schematic side view of a wheelchair.

[Explanation of symbols]

 Reference Signs List 10 Wheelchair (traveling vehicle) 11 Body 12 Rail 12a Front rail (first support) 12b Center rail (second support) 12c Rear rail (first support) 13 Seat

Claims (2)

[Claims] 1. A vehicle comprising: a vehicle body; a first support portion having an arc shape; and a second support portion having an arc shape or a linear shape having a curvature larger than the curvature of the arc shape of the first support portion. A traveling vehicle that retains a seat posture, comprising: a seat support fixed to the vehicle; and a seat that moves along the seat support according to the inclination of the vehicle body. 2. The seat support section has a first support section at a front portion and a rear portion with respect to a traveling direction of a traveling vehicle,
The traveling vehicle according to claim 1, wherein a portion between the first support portion of the front portion and the first support portion of the rear portion is the second support portion.