JP2003204995A - Platform for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a platform for a vehicle with excellent vibration absorption and effectively using a space in a room of the vehicle. <P>SOLUTION: The platform 20 for the vehicle comprises a ceiling plate 55 on which a wheelchair 1 and the like can be placed, a base frame 21 supporting this ceiling plate 55 and a vibration absorbing mechanism 30 arranged between the ceiling plate 55 and the base frame 21. The vibration absorbing mechanism 30 comprises sheet springs 31A-31D bending up and down, a crank member 40 and a damper mechanism 50 and can absorb vibration applied on the platform 20 for the vehicle. In addition, by placing the crank member 40 between the sheet springs 31B-31D and the damper mechanism 50, the damper mechanism 50 can be horizontally arranged and thickness of the whole platform 20 for the vehicle can be set thin. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a vehicle platform for supporting a wheelchair.

[0002]

2. Description of the Related Art In recent years, a vehicle platform for supporting an in-vehicle mounted object such as a wheelchair in a vehicle,
There is a demand to equip a vibration absorbing mechanism in order to reduce the vibration applied to persons with disabilities in a wheelchair while the vehicle is running, and development is proceeding based on this. As an example of a mechanism similar to this type of vibration absorbing mechanism, JP-A-5-31
There is one disclosed in Japanese Patent Publication No. 140. This is a stretcher support structure applied to an emergency vehicle, and as shown in FIGS. 12 (a) and 12 (b), it is fixed to a lifting frame 82 on which the stretcher can be mounted and the vehicle side. An elevating arm 83 having a V shape is arranged between the base 81 and the base 81 so that the legs can be opened. The lifting arm 83 is provided with a vibration absorbing mechanism for absorbing vertical vibrations of the lifting frame 82. That is, the vibration absorbing mechanism is composed of the compression coil spring 85 and the hydraulic cylinder 86, one end of which is fixed to the center of the side surface of the elevating arm 83 by the mounting shaft 87 and the other end of which is the end of the base 81. It is fixed to a bracket 88 attached to the section.

Therefore, when the lifting arm 83 tilts as the lifting frame 82 moves up and down, the compression coil spring 85 and the hydraulic cylinder 86 expand and contract according to the positional relationship of the mounting shaft 87. That is, the compression coil spring 85
The hydraulic cylinder 86 has a shorter total length as the mounting shaft 87 approaches the base 81, and has a longer total length as the mounting shaft 87 gets farther. Therefore, when vertical vibration is applied to the elevating frame 82, the compression coil spring 85 and the hydraulic cylinder 86 expand and contract to absorb the vibration.

[0004]

When the above structure is applied to a vehicle platform for supporting a wheelchair in a vehicle, the vehicle platform is a ceiling plate (corresponding to the lifting frame 82) for supporting the wheelchair and this ceiling. A structure in which a compression coil spring 85 and a hydraulic cylinder 86 are arranged in the vertical direction between a support plate (corresponding to the base 81) that supports the plate to absorb the vibration of the ceiling plate in the vertical direction can be considered. On the other hand, there is a demand to secure a sufficient gap between the head of a disabled person and the ceiling surface of the vehicle in consideration of the riding comfort of people with disabilities who are in a wheelchair. It is necessary to set it thin. In the case of the above structure, the compression coil spring 85 and the hydraulic cylinder 86 are arranged in the vertical direction. Therefore, in order to secure the total length of the compression coil spring 85 and the stroke of the hydraulic cylinder 86 which are necessary for absorbing vibration, There is no choice but to thicken the platform. The present invention was completed in view of the above circumstances, and an object of the present invention is to provide a vehicle platform that is excellent in vibration absorption and can effectively use the space in the vehicle interior.

[0005]

As a means for achieving the above object, the invention of claim 1 is a ceiling plate on which an in-vehicle mount can be placed, and a base member for supporting the ceiling plate. A vibration absorbing mechanism arranged between the ceiling plate and the base member for absorbing vertical vibration applied to the ceiling plate, wherein the vibration absorbing mechanism is provided on a lower surface of the ceiling plate. Of the ceiling plate by arranging it substantially horizontally, and a part of the ceiling plate is attached to the base member side to form a fixed part, while another part of the movable part is attached to the ceiling plate. A leaf spring that can be bent following up-and-down movement, a damper mechanism that is arranged in a substantially horizontal direction and that is composed of a stretchable cylinder, and one end side of which is attached to the base member side, and the other end side of the damper mechanism. And the above Based on the operation of the side connected to the well plate side, the side connected to the ceiling plate side moves up and down, and the side connected to the damper mechanism that operates with this up and down movement. It is characterized in that it is configured to include a transmission mechanism that expands and contracts the damper mechanism.

According to a second aspect of the present invention, in the first aspect, the transmission mechanism is pivotally supported by a pin body so as to be rotatable in a vertical plane, and the leaf spring in a horizontal plane. And a crank member disposed substantially orthogonal to the crank member, and the crank member is connected to the ceiling plate side with respect to the leaf spring, and
The connection side with the damper mechanism and the connection side with the leaf spring side are each freely rotatable, and further, a rotation shaft hole for inserting the pin body in the crank member is provided at the center of the pin body, The ceiling plate vibrates vertically, which is formed substantially along an axis connecting the leaf spring side and the center of a connecting shaft that connects the crank member, and has a substantially elongated hole shape extending toward the connecting shaft side. The feature is that the pin body relatively moves in the rotation shaft hole when the above is performed.

According to a third aspect of the present invention, according to the first or second aspect, a plurality of the vibration absorbing mechanisms are symmetrically arranged along an outer edge of the ceiling plate, and each of the vibration absorbing mechanisms is absorbed. It is characterized in that a lashing device for fixing the in-vehicle mounted object placed on the ceiling plate is arranged in an area surrounded by the mechanism.

[0008]

<Advantages and effects of the invention><Invention of claim 1> According to the invention of claim 1, a situation in which an in-vehicle mounted object is placed on a vehicle platform located in the vehicle, for example, a disabled person or the like gets in a wheelchair. In case, or when luggage is placed,
When vertical vibration is applied to the ceiling plate, the plate spring bends in the vertical direction, and the vibration is gradually attenuated. Further, the transmission mechanism operates in accordance with the vertical movement of the ceiling plate to expand and contract the cylinder to absorb the vibration of the ceiling plate together with the leaf spring in a short time. Therefore, it is possible to mitigate the uncomfortable feeling and the like felt by persons with disabilities in a wheelchair while the vehicle is traveling. Further, the damper mechanism can be horizontally arranged by interposing the transmission mechanism between the ceiling plate side and the damper mechanism. Therefore, the thickness dimension required to arrange the vibration absorbing mechanism may be a thickness dimension capable of accommodating the horizontally arranged cylinders. Therefore, as compared with the case where the damper mechanism is arranged in the vertical direction, the thickness of the entire vehicle platform can be set thinner.

<Invention of Claim 2> According to the invention of Claim 2, one end of the crank member, which is connected to the ceiling plate side, is pushed in the rotational direction by the vertical movement of the ceiling plate side so that the crank member is centered on the pin body. The pin member fixed in the vertical plane relatively moves within the rotary shaft hole formed in a substantially long hole shape, that is, the crank member itself moves along the rotary shaft hole. This moving direction is a direction in which the damper mechanism is expanded and contracted. From the above, the damper mechanism expands and contracts due to the rotation operation and the movement operation of the crank member. Therefore, the stroke required to absorb the vibration is amplified compared with the case where the stroke is performed only by the rotation operation (when the relief is provided in a place different from the rotation shaft hole to rotate the crank member). Excellent vibration absorption performance. Further, since the leaf spring swings around the fixed portion, it includes a horizontal component movement in addition to a vertical component movement, but the crank member and its corresponding leaf spring are linear in a horizontal plane. In the case of being arranged at, the operating direction of the horizontal component in the leaf spring becomes substantially the same as the major axis direction in the rotary shaft hole. Therefore, there is a concern that the movement of the crank member may be canceled by the movement of the leaf spring in the horizontal direction, but since the crank member and the corresponding leaf spring are arranged substantially orthogonal to each other, as described above. Moreover, the movement of the crank member is not canceled by the leaf spring. Further, the moving direction of the ceiling plate is restricted only by the leaf spring. Therefore, the vertical movement of the ceiling plate can be transmitted to the crank member without transmission loss such as lateral displacement.

<Invention of Claim 3> According to the invention of Claim 3, the lashing mechanism is arranged in a region surrounded by the vibration absorbing mechanism. Therefore, the entire vehicle platform can be set smaller in the plane direction and the thickness direction than in the case where the lashing device and the vibration absorbing mechanism are arranged one above the other or when they are spread in the plane direction.

[0011]

DETAILED DESCRIPTION OF THE INVENTION One embodiment of the present invention will be described with reference to FIGS. The present embodiment shows an example in which the present invention is applied to a one-box type vehicle W. As shown in FIGS. 1 and 2, a liftback type backdoor D is provided at the rear end of the vehicle W, and the opening M can be opened and closed. Further, a lift device L is provided in the vehicle compartment near the back door D, and a vehicle platform (hereinafter, referred to as a vehicle platform) on which a wheelchair (corresponding to an in-vehicle mount of the present invention) 1 can be placed at a rear end thereof. 20) is provided. In the following description, the forward direction of the vehicle W is the front side, the backward direction is the rear side, and the left-right direction is also based on the direction viewed from the lower right side of FIG.

First, the wheelchair 1 used by a disabled person or the like to get into the vehicle W will be briefly described. The wheelchair 1 has a skeleton formed by a support frame 4 and has a seat portion 5. The front lower part of the seat 5 is provided with a pair of right and left freely rotatable wheels 7, and the rear lower part is provided with a pair of left and right rear wheels 8 having a diameter larger than that of the free wheel 7.

Next, since the lift device L is a known device, its description will be simplified. The lift device L is provided with a pair of support arms 11 composed of a plurality of links.
One end side of the support arm 11 is connected to the vehicle side, and the other end side is connected to the front end side of the side surface of the platform 20. The lift device L is connected to the platform 2
0 is a riding position where the wheelchair 1 can enter, as shown in FIG. 1, and the floor surface 1 in the vehicle interior together with the wheelchair 1 as shown in FIG.
It can be displaced while being held in a substantially horizontal state with respect to the carry-in position in which it is housed above zero.

Next, the platform 20 will be described. The platform 20 has a skeleton formed by a base frame (corresponding to a base member of the present invention) 21 forming an outer frame of the platform 20 and a ceiling plate 55 elastically supported on the upper side of the base frame 21. As shown in FIG.
The base frame 21 is made of metal and has four square pipes 22A.
22D are frame-shaped and are formed. The upper surfaces of the side corner pipes 22C and 22D are the front and rear corner pipes 22.
The height is higher than the upper surfaces of A and 22B and the ceiling plate 55 described later (see FIG. 10), and this step functions as a guide for preventing the wheelchair 1 from getting on and off the platform 20. In addition, the lower part of the base frame 21 has a first
The center frame 23 and the second center frame 24 are erected in a cross shape, and the corresponding front and rear corner pipes 22
The ends are connected to the side surfaces of A, 22B and the side corner pipes 22C, 22D.

Further, the base frame 21 is provided with first and second mounting frames 25, 26A and 26B for mounting a vibration absorbing mechanism 30 which will be described later. In particular,
Between the front side square pipe 22A and the second center frame 24, the first mounting frame 2 is provided in parallel with the front side square pipe 22A.
5 is erected, and the first center frame 23 is provided between the second center frame 24 and the rear corner pipe 22B and on both the left and right sides sandwiching the first center frame 23.
Second mounting frames 26A and 26B are respectively installed in parallel with. Base frame 21 configured as described above
Has a symmetrical shape with the first center frame 23 as an axis.

On the rear end side of the base frame 21, side corner pipes 22C and 22D extend from a rear corner pipe 22B, and a slope plate 27 for assisting getting in and out of the wheelchair 1 is located on the rear side. It is attached over the entire width of the square pipe 22B. The slope plate 27 is composed of a fixed plate 27A and a movable plate 27B whose upper surface is formed in a downward slope toward the rear end side (see FIG. 10), and the fixed plate 27A is fixed to the rear end of the rear side square pipe 22B. Further, a movable plate 27B is rotatably attached to the lower portion behind the movable plate 27B. The movable plate 27B uses an electric motor (not shown) as a drive source and is always in an upright posture, but it can be bridged between the ground and the platform 20 by rotating and tilting it toward the ground.

Next, the ceiling plate 55 will be described with reference to FIG. The ceiling plate 55 is made of metal, has a base plate portion 56 on which the wheelchair 1 can be placed, and has a downward reinforcing wall 57 on the periphery thereof. The board portion 56 is the base frame 21.
It is set to a size with a slight gap (a gap required for the base frame 21 to vertically vibrate) with respect to the inner width of the mounting portion formed at the four corners lower than the substrate portion 56. 56A is provided and a mounting hole is provided therein. The ceiling plate 55 is provided with the leaf springs 31A to 31D, which form the vibration absorbing mechanism 30 described below, through the mounting holes.
Is attached to. Therefore, the ceiling plate 55 is supported at its four corners by the leaf springs 31A to 31D inside the base frame 21, and the other parts are in a floating state. As described above, the ceiling plate 55 is surrounded by the base frame 21 and is supported by the plate springs 31A to 31D to be restricted from moving in the left-right direction, and is movable only in the up-down direction.

Next, the vibration absorbing mechanism 30 constituting the platform 20 will be described. The leaf springs 31A to 31D forming the vibration absorbing mechanism 30 are provided with two types of two different lengths. Leaf spring 31A on the short side,
31B is formed to be shorter than the entire length of the front / rear corner pipes 22A and 22B, and the long leaf springs 31C and 31D are formed to be shorter than the entire length of the side corner pipes 22C and 22D. The leaf springs 31A to 31D are arranged inside the base frame 21 along the outer edge of the base frame 21, respectively, and are arranged symmetrically with the first center frame 23 as the center.

Next, the support structure for each of the leaf springs 31A to 31D will be described. The leaf springs 31A and 31B on the short side are arranged horizontally, and the center portion of the side surface of the leaf spring 31A is located at the front end portion of the first center frame 23.
The central portion of the side surface of 1B is fixed to the rear end portion of the first center frame 23 by screwing, respectively.
Both ends of 1A and 31B are free ends. This central portion corresponds to the fixed portion of the present invention, and both ends correspond to the movable portion that moves up and down together with the ceiling plate 55. Long leaf spring 31
C and 31D also have the same support structure and are arranged horizontally, and the central portions of the respective side surfaces are fixed to the left and right end portions of the second center frame 24 by screwing, and both end portions of the leaf springs 31C and 31D are fixed. The side is the free end.

Rubber stoppers 35B for restricting upward displacement of the leaf springs 31A to 31D are provided on the front end sides of the leaf springs 31C and 31D and both end sides of the leaf spring 31B. The leaf spring 31C will be specifically described as an example. As shown in FIGS. 5 and 9, a direction in which the open side of the stopper folder 35 having a U-shaped cross-section with protrusions on the left and right at the end of the upper surface of the first mounting frame 25 is abutted against the leaf spring 31C. Installed on. Stopper folder 3
5 accommodates a part of the leaf spring 31C inside, and is provided with the stopper 35B on the ceiling surface. Leaf spring 31C
Is displaced upwards to a certain height, the leaf spring 31
The upper surface of C contacts the lower surface of the stopper 35B. A stopper folder 35 of the leaf spring 31D is attached to the other end of the first attachment frame 25, and a stopper folder 35 of the leaf spring 31B is attached to the rear ends of the second attachment frames 26A and 26B.

By the way, mounting blocks 32 are fixed by screws to the upper surfaces of the left and right ends of the leaf springs 31A to 31D. In this mounting block 32,
Joint fittings 33, each of which is provided with a mounting bolt 34 for fixing the ceiling plate 55, are installed upright. By inserting the mounting bolt 34 into a mounting hole of the ceiling plate 55 and tightening it with a nut 67, the ceiling plate 55 is secured. Can be fixed to the leaf springs 31A to 31D.

Next, the damper mechanism 50 which absorbs the vibration of the ceiling plate 55 together with the leaf springs 31A to 31D will be described. The damper mechanism 50 is composed of a cylinder 51 in which oil is enclosed and a rod 52 having a piston, and the piston can reciprocate in the cylinder 51 to absorb vibration and the like. Damper mechanism 50
Are arranged on all four sides of the base frame 21 substantially horizontally. On the front side of the base frame 21, a pair is arranged along both sides of the first center frame 23 along the first mounting frame 25, and on the rear side, a pair is arranged along the second mounting frames 26A, 26B. Are arranged. Further, the damper mechanism 50 and a crank member (corresponding to a transmission mechanism of the present invention) 40 described later are arranged substantially orthogonal to the corresponding leaf springs 31B to 31D in the horizontal plane. Each of the damper mechanisms 50 arranged in this way has the first center frame 23 as a whole.
Since the arrangement is left-right symmetrical with sandwiching between, only the right half (upper side in FIG. 4) of the detailed support structure will be described.

The damper mechanism 50 arranged on the front side of the base frame 21 will be described. As shown in FIGS. 5 and 7, a mounting portion 51A is provided at the end of a cylinder 51 that constitutes the damper mechanism 50, and a mounting portion 52A is also provided at the end of the rod 52. On the other hand, at a position near the center of the first mounting frame 25, a third joint bracket 39 including a mounting plate 39B having an L-shaped cross section and a bearing plate 39A having a U-shape is attached. The mounting portion 52A of the rod 52 is rotatably supported by 39A via a support shaft 53. The mounting portion 51A of the cylinder 51 is connected to the ceiling plate 55 side via the crank member 40.

A first joint bracket 37 having an L-shaped cross section is provided laterally on the side surface of the mounting block 32 in the long leaf spring 31C. On the other hand, a second joint bracket 38 having an L-shaped cross section is vertically mounted on the upper surface of the first mounting frame 25.
A hinge pin (corresponding to the pin body of the present invention) is provided on its side surface.
A crank member 40 is rotatably supported in a vertical plane via 45.

The crank member 40 has a pair of crank arms 4 with a rotary shaft hole 43 through which the hinge pin 45 is inserted.
1 and 42 extend substantially in parallel and in opposite directions, and the crank arm 42 on one side is rotatably attached to a mounting portion 51A of the cylinder 51 via a support shaft 54 and the crank arm 41 on the other side. Is the first joint bracket 3
It is attached to 7 via a connecting shaft 46 in a freely rotatable manner.
In this way, the damper mechanism 50 has the leaf springs 31B-3B.
It is connected to 1D and by extension to the ceiling board 55. Further, the support structure of the damper mechanism 50 arranged on the rear side of the base frame 21 is the same as the support structure of the damper mechanism 50 arranged on the front side, and therefore description thereof will be omitted.

The operation of the vibration absorbing mechanism 30 when the ceiling plate 55 is displaced downward will be described. As shown in FIGS. 7 and 8, when the ceiling plate 55 moves downward,
Following this, the leaf springs 31A to 31D are bent, and the first joint bracket 37 is displaced downward accordingly.
Then, the crank arm 4 on one side of the crank member 40
Since 1 moves downward, the crank member 40 itself rotates counterclockwise around the hinge pin 45. By this rotation operation, the damper mechanism 50 connected to the crank arm 42 on the other side is pushed and contracted in a direction (rightward in FIG. 8) that shortens the overall length of the damper mechanism 50, while the crank member 40 is rotated about the support shaft 53. It rotates in the direction opposite to the rotation direction, that is, clockwise.

By the way, the rotation shaft hole 4 of the crank member 40
As shown in FIGS. 7 and 11, 3 is the center of the hinge pin 45, the first joint bracket 37 and the crank arm 4.
1 is formed substantially along an axis connecting the center of the connecting shaft 46 connecting the 1 and the connecting shaft 46, and has a substantially elongated hole shape extending toward the connecting shaft 46 side. Therefore, as the ceiling plate 55 moves up and down, the hinge pin 45 relatively moves within the rotation shaft hole 43.
Due to this relative movement, the crank member 40 itself moves and the stroke of expansion and contraction of the damper mechanism 50 is increased (see FIG. 8). In addition, the rotary shaft hole 43
The minor diameter side is set to have a slight clearance with respect to the hinge pin 45 in order to smoothly perform the above-described rotation and movement of the crank member 40. The operation of the vibration absorbing mechanism 30 when the ceiling plate 55 is displaced upward is the reverse of the operation when the ceiling plate 55 is displaced downward, and thus the description thereof will be omitted.

Next, at the central portion of the back surface of the base plate portion 56, at a position avoiding the vibration absorbing mechanism 30, there is provided an accommodating portion 58 for accommodating the fastening device 60 described below.
The storage portion 58 is formed such that the front and rear side surfaces facing each other are open (see FIG. 10). As shown in FIG. 3, the lashing device 60 has four winders 61A to 61D, and the respective winders 61A to 61D are serially arranged in the front-rear direction and parallel to each other in the storage portion 58. Are placed close to each other. One end of the support wire 62 is attached to each of the winding shafts of the winding devices 61A to 61D.
Further, the winders 61A to 61D are biased in the wind direction by a spring member (not shown) so that the support wire 62 can be wound.

Further, direction changing pulleys 64A and 64B are arranged at positions near both ends of the front side square pipe 22A, respectively, and the support wire 62 pulled out from the winders 61A and 61B is the pulleys 64A and 64B. It is pulled out to the upper surface side of the ceiling plate 55 through. A hook 63 is attached to the tip of the drawn wire 62 to fix the front part of the wheelchair 1. On the other hand, the pulley 64 is provided at a position near the left and right ends on the rear end side of the storage portion 58.
C and 64D are arranged respectively, and the wire pulled out from the winders 62C and 62D is the pulley 6 as in the front side.
The rear portion of the wheelchair 1 is fixed by a hook 63 that is pulled out to the upper surface side of the ceiling plate 55 via 4C and 64D and is attached to the tip end side thereof.

Further, the fastening device 60 is provided with a lock mechanism for fixing the wire 62 (which allows / prohibits the rotational movement of the winding shafts of the winding devices 61A to 61D). The lock mechanism is operated by rotating the operation arm 65. In the present embodiment, the operation arm 65 is provided at a position near the rear end of the storage section 58, and the ceiling plate 55 side. It is possible to operate from.

Next, the function and effect of the present embodiment configured as described above will be specifically described. First, in order for a disabled person or the like to get on the vehicle W in the wheelchair 1, the platform 20
Is set to the height of the ground, and the slope board 27 bridges between the ceiling board 55 and the ground. From this state, the wheelchair 1 is mounted on the ceiling plate 55. Following the completion of the boarding, the electric motor is driven to bring the movable plate 27B to the upright posture, and the hooks 63 on the front side of the fastening device 60 are attached to the left and right support frames 4 on the front side of the wheelchair 1 and the hooks 63 on the rear side. Is hooked on each of the left and right support frames 4 on the rear side of the wheelchair 1, and the operation arm 65 is rotated. This locks the rotation of each winding shaft of each of the winding devices 62A to 62D to fix the front, rear, left, and right of the wheelchair 1, and thus the wheelchair 1 is fixed to the platform 20. From this state, the platform 20 is housed in the vehicle W through a lifting operation / sliding operation by the lift device L. After that, the backdoor D
Is closed and boarding in wheelchair 1 is completed.

When the vehicle W is driven after the entry of the wheelchair 1 is completed, the vibration during the driving is transmitted to the ceiling plate 55 constituting the platform 20 via the wheelchair 1. Then, the leaf springs 31A to 31D bend in the vertical direction, and the vibration is gradually attenuated. Further, the crank arm 41 moves up and down along with the up and down movement of the leaf springs 31A to 31D. This vertical movement causes the crank member 40 to make a rotational movement about the hinge pin 45. At this time, the damper mechanism 50 is pulled by the crank arm 42 of the crank member 40, and rotates about the support shaft 53 in the direction opposite to the rotating direction of the crank member 40. As described above, the operation in which the crank member 40 and the damper mechanism 50 rotate in opposite directions expands and contracts the pitch between the spindle 51 on the cylinder 51 side and the spindle 53 on the rod 52 side in the damper mechanism 50. Therefore, the damper mechanism 50 expands and contracts to absorb the vibration of the ceiling plate 55 together with the leaf springs 31A to 31D.

Further, as the leaf springs 31B to 31D move up and down, the crank member 40 moves along the rotation shaft hole 43. This moving direction is a direction in which the stroke of the damper mechanism 50 is amplified. Therefore, the stroke for expanding and contracting the damper mechanism 50 becomes larger, and the vibration absorbing performance is excellent. Therefore, it is possible to mitigate the uncomfortable feeling and the like felt by persons with disabilities in the wheelchair 1 while the vehicle is traveling.

Further, since the leaf springs 31A to 31D perform the swinging movement around the fixed portion, the horizontal component movement is included in addition to the vertical component movement. However, each leaf spring corresponding to the crank member 40 is included. When 31B to 31D are linearly arranged in the horizontal plane, the operating direction of the horizontal component in the leaf springs 31B to 31D is substantially equal to the major axis direction in the rotary shaft hole 43. Therefore, the movement of the crank member 40 is canceled by the movement of the leaf springs 31B to 31D in the horizontal direction, but the crank member 40 and the leaf springs 31B to 31D are arranged substantially orthogonal to each other.
As described above, the movement of the crank member 40 causes the leaf spring 3 to move.
It is not canceled by 1B to 31D. Also,
The moving direction of the ceiling plate 55 is restricted only in the vertical direction by the leaf springs 31B to 31D and the base frame 21. Therefore, the vertical movement of the ceiling plate 55 can be transmitted to the crank member 40 without transmission loss such as lateral displacement.
It is possible to secure a stroke for the moving movement of.

According to this embodiment, the leaf springs 31A to 31A are used.
Since the D and the damper mechanism 50 are arranged substantially horizontally, the thickness dimension required to arrange the vibration absorbing mechanism 30 can ensure the vertical stroke of the leaf springs 31A to 31D, and the cylinder arranged horizontally. Any thickness may be used as long as it can accommodate 51. Therefore, the thickness of the entire vehicle platform 20 can be set to be smaller than in the case where the damper mechanism 50 is arranged in the vertical direction, and the space in the room, that is, the head of the physically handicapped person who gets on the wheelchair 1 and the vehicle W. A gap with the ceiling surface can be secured, so that people with disabilities do not feel pressured.

Further, the fastening device 60 is arranged in the area surrounded by the vibration absorbing mechanism 30. Therefore, the vehicle platform 20 as a whole can be set smaller in the plane direction and the thickness direction than when the lashing device 60 and the vibration absorbing mechanism 30 are arranged one above the other or spread in the plane direction. it can. Further, by interposing the crank member 40 between the leaf springs 31A to 31D and the damper mechanism 50, the length from the center of the hinge pin 45 of the crank member 40 to the connecting shaft 46 connected to the ceiling plate 55 side, and the damper mechanism. By setting the ratio of the lengths up to the support shaft 54 connected to the 50 side to a desired ratio in advance, the damper mechanism 5
The stroke of 0 can be set to a large value, and it has excellent vibration absorption performance.

<Other Embodiments> The present invention is not limited to the embodiments described above and the drawings. For example, the following embodiments are also included in the technical scope of the present invention. In addition to the above, various modifications can be made without departing from the scope of the invention.

(1) In the present embodiment, the vehicle platform 20 is connected to the vehicle W via the lift device L, and the vehicle W is configured to accommodate both the lift device L and the vehicle platform 20. The lift device may be configured separately from the vehicle W and the vehicle platform 20 alone may be housed on the floor surface 10 of the vehicle W.

(2) In this embodiment, the transmission mechanism is composed of the crank member 40 which is rotatable in the vertical plane.
The transmission mechanism may be one that operates in conjunction with the vertical movement of the leaf springs 31A to 31D to expand and contract the damper mechanism 50, and may be configured by, for example, a crank member that is rotatable in a horizontal plane.

(3) In the present embodiment, the damper mechanism 50 is rotatably attached to the base frame 21 so as to be interlocked with the crank member 40 so that the damper mechanism 50 expands and contracts as the crank member 40 rotates. The damper mechanism 50 is fixedly installed on the base frame 21, and the damper mechanism 5
If a relief is provided in a shaft hole through which a support shaft 54 that connects 0 and the crank member 40 is inserted, the crank member 40 can be expanded and contracted in the axial direction as the crank member 40 rotates.

[Brief description of drawings]

FIG. 1 is a perspective view showing a rear side of a vehicle W according to an embodiment of the present invention.

FIG. 2 is a front view showing a state in which the vehicle platform is stored.

FIG. 3 is a plan view thereof

FIG. 4 is a plan view of a vehicle platform.

FIG. 5 is an enlarged view of the front end side.

6 is a sectional view taken along line AA in FIG.

FIG. 7 is a sectional view taken along line BB in FIG. 5 (showing the initial state of the damper mechanism).

FIG. 8 is a sectional view taken along line BB in FIG. 5 (showing the operating state of the damper mechanism).

9 is a sectional view taken along line CC in FIG.

FIG. 10 is a sectional view of a vehicle platform.

FIG. 11 is a front view of a crank member showing an initial state and a state after movement.

12A is a front view of a conventional example, and FIG. 12B is a plan view of the conventional example.

[Explanation of symbols]

1 ... Wheelchair (in-vehicle equipment) 20 ... Vehicle platform 21 ... Base frame (base member) 30 ... Vibration absorption mechanism 31A to 31D ... Leaf spring 40 ... Crank member (transmission mechanism) 43 ... Rotating shaft hole 45 ... Hinge pin (pin body) 46 ... Connection shaft 50 ... Damper mechanism 51 ... Cylinder 55 ... Ceiling board 60 ... Lashing device

Claims (3)

[Claims] 1. A ceiling plate on which an in-vehicle mount can be placed, a base member for supporting the ceiling plate, and a vertical direction which is arranged between the ceiling plate and the base member and which is added to the ceiling plate in a vertical direction. A vehicle platform comprising a vibration absorbing mechanism for absorbing vibration, wherein the vibration absorbing mechanism is arranged substantially horizontally along a lower surface of the ceiling plate, and a part of the vibration absorbing mechanism is attached to the base member side. While being a fixed part, the other part, which is a movable part, is attached to the ceiling plate, and is bent so as to follow the vertical movement of the ceiling plate, and is arranged in a substantially horizontal direction, and A damper mechanism having an expandable cylinder, one end of which is attached to the base member side, is connected between the other end of the damper mechanism and the ceiling plate side, and the side connected to the ceiling plate side is Move up and down And a transmission mechanism that expands and contracts the damper mechanism based on the operation on the side connected to the damper mechanism that operates in association with the vertical movement. 2. The transmission mechanism is rotatably supported in a vertical plane by being pivotally supported by a pin body, and is constituted by a crank member arranged substantially orthogonal to the leaf spring in a horizontal plane. At the same time, the connection of the crank member to the ceiling plate side is made to the plate spring, and the connection side to the damper mechanism and the connection side to the plate spring side are respectively freely rotatable. A rotation shaft hole for inserting the pin body in the crank member is formed substantially along an axis connecting the center of the pin body and the center of a connection shaft connecting the leaf spring side and the crank member, The pin body is formed in a substantially elongated hole shape extending toward the connection shaft side, and the pin body relatively moves in the rotation shaft hole when the ceiling plate vibrates up and down. For vehicles Platform. 3. A plurality of the vibration absorbing mechanisms are symmetrically arranged along the outer edge of the ceiling plate, and in a region surrounded by each of the vibration absorbing mechanisms,
2. A lashing device for fixing the in-vehicle mount placed on the ceiling plate is arranged.
Alternatively, the vehicle platform according to claim 2.