JPH0714078Y2 - lift device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevating device which is attached to an entrance / exit of a passenger vehicle such as a bus and which is used for elevating and lowering a wheelchair by lifting and lowering a platform.

[0002]

2. Description of the Related Art Conventionally, when a wheelchair lifting device is provided in a passenger vehicle such as a bus, an opening is provided separately from an entrance / exit for passengers to get in and out of the vehicle, and the wheelchair lifting device is provided in this opening. Was doing. This is because the conventional wheelchair elevating device has a structure that cannot be used for ordinary passengers getting on and off because it simply elevates and lowers a flat platform.

For this reason, when the wheelchair lifting device is stored, the space volume in the vehicle compartment becomes narrower and a passage is required at the opening, so that the passage and seats in the compartment are functionally inconvenient. .

In view of this point, the applicant of the present invention has filed Japanese Utility Model Application No. 2-9.
No. 9854 proposes an elevating device in which a platform is stored in a staircase when passengers get in and out, and in the case of a wheelchair or the like, the platform can be used in a flat plate-shaped deployed state.

[0005]

By the way, the platform is lifted from the landing state to the floor of the vehicle to carry a wheelchair or the like. In the platform landing state, the fixed main body frame of the lifting device attached to the vehicle entrance / exit is used. It was found that a gap was created between the platform and the top surface of the platform, which required safety considerations. Further, although a hydraulic cylinder is used to change the platform from the retracted state to the deployed state, there is a restriction on the size of the vehicle entrance / exit, so it is necessary to consider the arrangement of the hydraulic hose connected to the hydraulic cylinder.

In view of the above points, the present invention provides a platform with a staircase for passengers getting on and off, and a flat platform for a wheelchair or the like without a special opening. It is an object of the present invention to provide an elevating device that can be mounted on a passenger vehicle, and thus can effectively arrange passages and seats in a room without deteriorating the transportation function and further improve safety and reliability.

[0007]

In order to achieve the above object, the lifting device of the present invention comprises: (a) a fixed main body frame fixed to the entrance / exit side of a vehicle; and (b) a fixed main body frame with respect to the fixed main body frame. A pair of fixed posts that are vertically erected vertically, and (c) an elevating member that is provided to be vertically movable on the pair of fixed posts, and (d) a cross member that connects between the lower end portions of the pair of elevating members. And (e) a platform in which the step plate and the connecting plate are sequentially connected and a rear end is attached to the cross member side, and (f) a flat plate from the stowed state in which the step plate and the connecting plate of the platform are stepped. a parallel link mechanism and the hydraulic cylinder for deployment for deployment to the Jo a developed state, (g) the vertically movably provided relative to the stationary body frame, and is biased upwardly by a spring Te, said raised and lowered with the elevation of the cross member has a structure in which a shielding plate for shielding the free space between the platform rear end and the body frame bottom.

[0008]

In the lifting device of the present invention, the platform has a structure in which the step plate and the connecting plate are sequentially connected.
When the passengers get on and off normally, the platform has a step shape, and in the case of a wheelchair or the like, the connecting plate and the tread plate have a flat plate shape so that the platform can be moved up and down. Therefore, it can be attached to a normal entrance / exit. The platform can be lifted up and down by driving a lifting member that can slide vertically (vertically) with respect to the fixed post, and it does not move laterally when the platform moves up and down. It is possible to get on and off the wheelchair etc. at the place. Further, when the platform is flat and in the landing position, the shielding plate shields an empty space between the lower end of the fixed main body frame fixed to the vehicle side entrance and exit and the rear end side of the platform, The user of the wheelchair who gets on the platform can easily operate the wheelchair by looking at the shield plate and grasping the distance between the shield plate and the wheelchair. Further, the shielding plate is also useful for improving safety when getting on and off the wheelchair. Furthermore, if the shield plate is made of a mirror surface material such as stainless steel, it becomes easier for the wheelchair user to check the feet. Further, since the shield plate is constantly urged upward by the spring, the lower end of the shield plate can follow the movement of the cross member connecting and fixing the left and right lifting members, and the hydraulic hose is attached to the lower surface side of the cross member. It is possible that the hydraulic hose is not hindered by the provision of the shielding plate.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a lifting device according to the present invention will be described below with reference to the drawings.

1 to 13 show the structure of the lifting device,
FIG. 14 shows an example of a shared bus as a vehicle equipped with a lifting device.

As shown in FIG. 14, on the side surface of the shared bus 1,
There are entrances and exits 2 and 3, and the lifting device 5 of the present invention.
Is attached to the center entrance / exit 3, for example.

As shown in FIGS. 1 to 13, the lifting device 5 includes
A fixed main body frame 10 fixed at a lower position of the bus entrance / exit 3 (the upper floor of the entrance / exit is indicated by 3A), and a standing body perpendicular to the fixed main body frame 10 positioned on both sides of the entrance / exit 3 respectively. An outer post 11 as a pair of fixed fixed posts, an inner post 12 as an elevating member (movable post) slidably provided in each hollow square pipe-shaped outer post 11, and the pair of inner posts. The outer connecting member 13 fixed to the lower end portion and protruding to the outside of the outer post 11, and the cross member 14 and the cross member 14 for connecting and integrating between the bracket portions 13A integrated with each outer connecting member 13. The fixed support frame 15 and the first step plate 16
A, a connecting plate 16B, and a second step plate 16C are sequentially connected via a hinge, and a parallel link mechanism for deployment for changing the platform 17 from a stair-like stored (folded) state to a flattened deployed state. 20 and
An extension plate 70 provided on the lower frame 38 below the parallel link mechanism for deployment, and the lower frame 3
A tip end plate 50 also serving as a car stop is provided at the tip of 8 so that it can be raised and lowered and can be turned upside down.

The lifting hydraulic cylinder 21 for lifting and lowering the inner post 12 includes a hollow piston rod 2.
By using the inside of 4 as an oil supply passage, oil can be supplied into the cylinder from the oil supply port 26 on the upper end side surface of the outer post 11, and constitutes a single-acting hydraulic cylinder that operates in the piston rod contraction direction. ing. The lifting cylinder 21 is disposed inside the hollow square pipe-shaped inner post 12, the upper end of the piston rod 24 is pivotally supported by the pin 27 on the upper end of the outer post 11, and the cylinder body 22 is pinned. Inner post 1 at 28
It is pivotally attached to the lower end of 2.

As shown in FIGS. 2 and 3, one side surface of the outer post 11 (the surface facing the front end side of the platform)
A vertical slit groove 30 is formed in the inner post 12, and the outer connecting members 13 fixed to the lower ends of the inner posts 12 project to the outside of the outer post 11 through the slit groove 30.

Between the lower ends of the pair of inner posts 11,
That is, the bracket portion 13A integrated with the external connecting member 13
The cross member 14 and the support frame 1 fixed by welding between them
A first step plate 16A is fixed to the upper part of the vehicle 5, and a rear end of a connecting plate 16B is pivotally attached to the first step plate 16A via a hinge. Further, one end of the compression arm 34 and the tension arm 36, which form a pair of links of the parallel link mechanism 20 for deployment with respect to the bracket portion 13A, have the pin 3 at one end.
It is pivotally attached at 1A and 32A.

The unfolding parallel link mechanism 20 comprises a compression arm 34, a tension arm 36, and a lower frame 38, and the compression arm 34 and the tension arm 36 have pins 31B and 32B at the other ends thereof, respectively. Is pivotally attached to. The second step plate 16C of the platform 17 is placed on the lower frame 38.
Here, the lower frame 38 is movable with respect to the second step plate 16C only in the lateral direction by a predetermined amount. That is,
As shown in FIGS. 4 and 5, a plurality of rollers 43 are pivotally attached to the roller mounting plate 42 fixed to the lower surface of the second step plate 16C, and the rollers 43 are formed in the lower frame 38 on the inner side surface of the roller engaging groove. It is adapted to engage with 44. The main body side of the deployment hydraulic cylinder 41 is pivotally attached to the side surface portion of the lower frame 38 via a pin 39A.
The tip end portion of the piston rod of the cylinder 41 is pivotally attached to the external connecting member 13 side by a pin 39B. The expansion assisting spring 45 is connected to the first step plate 16A and the connecting plate 16B.
It is arranged between and.

In the parallel link mechanism 20 for expansion as described above, the compression arm 34 and the tension arm 36 are in a suspended state when the hydraulic cylinder 41 for expansion is contracted, and the compression arm 34 and the tension arm 36 are rotated during expansion. The lower frame 38 is at the upper limit position. Therefore, the contraction of the hydraulic cylinder 41 for deployment,
With the extension, the lower frame 38 descends or rises while maintaining the horizontal state, and at the lower limit position of the lower frame 38, the platform 17 is bent in a stepwise manner as shown in FIG. 1, and the lower frame 38 rises. At the limit position, the platform 17 is in the state U shown in FIG. Here, the turning radii of the compression arm 34 and the tension arm 36 are set to be larger than the turning radii of the connecting plate 16B when the platform 17 is changed from the stepped bent state to the unfolded state. When the lower frame 38 is in the deployed state, that is, in the upper limit position of the lower frame 38, the lower frame 38 is in a state of protruding toward the tip side of the platform 17.

As shown in FIGS. 6 to 8, a tip plate 50 also serving as a car stop is connected to the tip end portion of the lower frame 38 through a double hinge mechanism formed by connecting two hinges. Axis 5 of the two hinges of the double hinge mechanism
One shaft 53A of the 3A and 53B is fixed to the lower frame side, and the other shaft 53B is rotatable about the shaft 53A. Both shafts 53A, 5
Inverted V-shaped side plates 54 are fitted and fixed on both sides of 3B. As a result, the inverted U-shaped side plate 54 can be rotated about the shaft 53A as a fulcrum, and the tip plate 19 also serving as a car stop can be rotated by the shaft 5A.
3B is a fulcrum of rotation, and can be turned up and down and can be turned upside down.

Further, the extension plate 7 is utilized by utilizing the shaft 53A.
0 is pivotally attached to the tip side of the lower frame 38.
The extension plate 70 is urged by a torsion spring (not shown) in such a direction that its rear end portion is lowered. As shown in FIG. 6, when the platform 17 has a stepped shape, it is stored below the second step plate 16C. In this state, as shown in FIGS. 7 and 8, when the platform 17 is deployed in a flat plate shape, the lower frame 38 with respect to the second step plate 16C is
It is located on the tip side of the platform 17 in accordance with the forward movement of the. Here, a roller attachment plate 71 is fixed to the lower side of the second step plate 16C, and a plate push-up roller 72 that pushes up the extension plate 70 is pivotally attached to the roller attachment plate 71. Therefore, when the lower frame 38 of FIG. 7 and FIG.
By riding on No. 2, the height is increased by a predetermined amount as compared with the time of storage of FIG.

As shown in FIGS. 6 to 8, a car stop rotating mechanism 51 for undulating the car stop and tip plate 50 and rotating it to an upside down state includes a double hinge mechanism and an inverted dogleg side plate 54. , One end of which is engaged with a horizontally elongated slot 81 of a perforated plate 80 fixed to both sides of the second step plate 16C by a pin 82A and the other end of which is connected to an end portion of the inverted U-shaped side plate 54 by a pin 82B. A rotary link 83, an undulating double-acting hydraulic cylinder 62, and an undulating small arm 55 fixed to an intermediate portion of the piston rod end of the cylinder 62 and the shaft 53B of the double hinge mechanism. Link 6
5 and. A cylinder mounting bracket 60 is fixed to the inside of the lower frame 38 as shown in FIG.
The undulating double-acting hydraulic cylinder 62 is pivotally attached to the cylinder mounting bracket 60 by a pin 61. Also,
A small arm 63 is pivotally attached to the bracket 60 with a pin 64,
With respect to the tip of the small arm 63, the tip of the piston rod of the undulating double-acting hydraulic cylinder 62 and the undulating link 6
One end of 5 is pivotally attached by a pin 66. As a result, as shown in FIGS. 1, 2 and 6, the tip plate 50 that also serves as a car stop has the rotation link 83 when the undulating double-acting hydraulic cylinder 62 is in the contracted state and the platform 18 is bent in a stepwise manner. The pin 82A at the engaging end is located at the right end of the elongated hole 81 as shown in FIG. 6, and the tip plate 50 is forcibly turned over and overlaps the second step plate 16C. Then, as the platform 17 expands into a flat plate shape, the lower frame 38 advances with respect to the second step plate 16C, the rotation link 83 engages with the left end of the elongated hole 81, and the platform 17 becomes a flat plate. 7, the inverted U-shaped side plate 54 is pulled by the rotation link 83, and the shaft 53A
It can be rotated about 90 degrees using as a fulcrum. In the operation of FIGS. 6 to 7, the double-acting hydraulic cylinder 62 is driven, and further, from the state of FIG. 7, the vehicle stop and tip plate 50 is rotated about the shaft 53B as the fulcrum of the undulating double-acting hydraulic cylinder 62. As a result, as shown in FIG. 8, the leading end can be lowered (fallen down). Further, by contracting the hydraulic cylinder 62 from the state shown in FIG.
Can be set up as a car stop.

It should be noted that the extension plate 70 is divided into two parts on the left and right sides in a relation that the hoisting link 65 of the car stop rotating mechanism 51 for hoisting the car stop tip plate 50 is arranged at the center of the tip of the platform 17. There is.

The bottom surface of the entrance / exit 3 on the vehicle side is completely cut out so that the lower frame 38 of the lifting device 5 can be landed. Dust and splashes of rainwater may get in through the gaps. Therefore, the seal plates 86, to which the elastic seal material such as sponge is attached, are attached to the left and right side surfaces of the fixed main body frame 10 via the hinges 87. The seal plate 86 is biased by a spring (not shown) in such a direction as to shield the left and right bottom portions of the entrance / exit 3.
Therefore, when the inner post 12 is stored in the outer post at the upper limit position as when the vehicle is traveling, the left and right gaps between the platform 17 and the main body frame 10 which are stepwise as shown in FIG. 1 are closed. To do. Further, when the inner post 12 is lowered, the seal plate 86 is automatically opened as shown by an arrow W in FIG. 3, so that the lowering of the inner post 12 and the like is not hindered.

Further, as shown in FIG. 9, a seal plate 100 extending rearward is fixed to the lower frame 38 of the parallel link mechanism 20 for deployment, and the leading edge of the seal plate 100 is fixed in the retracted state of the platform 17 to the main body. Frame 10
The elastic seal member 101 such as a sponge fixed to the side is brought into contact (press contact). As a result, the remaining portions of the left and right sealing plates 86 that are not shielded are also sealed.
Since it is shielded by 0, the splash of rainwater can be prevented from entering the lifting device itself or the entrance / exit 3.

As shown in FIGS. 9 to 11, on the back plate 110 of the stationary main body frame 10 fixed to the entrance / exit 3 side (positioned in front of the entrance / exit 3 when viewed from the outside of the vehicle), a slide receiver 111 is provided. A pair of slide receivers 11 are fixed facing each other.
1, the shield plate 112 is supported slidably in the vertical direction. The shielding plate 112 has a horizontal bent portion 113 at its upper edge, and the horizontal bent portion 113 is adapted to engage with the rear end of the platform 17. In addition, the shielding plate 112
An L-shaped hook 114 is fixed to the lower part of the hook 1.
14 engages the cross member 14 during the descending operation. Further, a spring mounting member 115 is fixed to the hook 114,
An extension spring 116 is arranged between the spring mounting member 115 and the upper position of the fixed main body frame 10. As a result, the shielding plate 112 is biased upward. However, the spring mounting member 115 functions as a stopper that contacts the lower end of the slide receiver 111 and defines the upper limit position of the shield plate 112.
The upper end of the shielding plate 112 does not protrude from the platform 17. Further, when the cross member 14 descends to a position where it engages with the L-shaped hook 114, the shielding plate 11
2 interlocks with the elevation of the cross member 14. Therefore, when the platform 17 descends, the fixed main body frame 10
It is possible to shield an empty space between the lower end of the back plate 110 and the rear end side of the platform. Furthermore, extension spring 1
Since the shielding plate 112 is pulled up by 16, the shielding plate 112 does not get in the way when the hydraulic hose 135 to be described below is passed under the cross member 14 (only the cross member 14 rises first, leaving the shielding plate 112). Never).

As shown in FIG. 12, a lock mechanism 90 is attached to the lower frame 38 in order to keep the platform 17 locked in a staircase state. That is, the lock mechanism 90 includes a lock lever 92 pivotally attached to the lower frame 38 with a pin 98 and a tip portion serving as a hook 91, and a lock hydraulic cylinder 93 pivotally attached to the lower frame 38 with a pin 95. I have it. The piston rod 94 of the hydraulic cylinder 93 is the lock lever 92.
Is connected to the rear end of the. Therefore, the hydraulic cylinder 93
When extended, the hook 91 engages with the lock pin 96 fixed to the main body frame 10, and the lower frame 38 is locked to the main body frame 10 (in the case where the hydraulic cylinder 93 is a single action, the extension operation is built-in). This is done by the spring. On the contrary, when the hydraulic oil is supplied to the hydraulic cylinder 93 and contracted, the hook 91 is disengaged, and the lower frame 38 can move according to the parallel link mechanism 20 for deployment.

As shown in FIGS. 9 and 12, the fixed main body frame 1 receives the hydraulic oil supplied from the hydraulic power source on the vehicle side.
In the lower part of 0, the required number (here, two for the left and right deploying hydraulic cylinders 41, and the undulating double-acting hydraulic cylinder 62).
2 for, 1 for hydraulic cylinder 93 for locking
The total number of swivel joints 130 is 5 and the fixed side connection port 13 of the swivel joint 130 is provided.
1, a hydraulic hose from the vehicle-side hydraulic power source is connected.
Further, a swivel joint 140 is attached to the support frame 15 side below the platform 17 to receive the hydraulic oil via the swivel joint 130. Here, the fixed side connection port 14 of the swivel joint 140
1 and the rotation side connection port 1 of the swivel joint 130
32 are connected by hydraulic hoses 135, and the rotation side connection port 142 of the swivel joint 140 and each hydraulic cylinder are connected by hydraulic hoses 136.

As shown in FIG. 9, the mounting plate 1 is attached to the support frame 15.
The protector mounting arm 145 is pivotally supported at a fulcrum F via 37, and the hose protector 146, which is a rectangular metal plate having a width slightly shorter than the width of the platform 17 in the left-right direction, is welded along the lower edge of the arm 145. It is fixed and integrated with. A long roller 147 is rotatably attached to the lower end of the arm 145. However,
The arm 145 is normally set in an inclined state by a stopper means (not shown), and is substantially horizontal in the landing state as indicated by an imaginary line V in FIG. 9 showing the lower limit position of the platform 17. The roller 147 is an arm 145.
It has a function that allows it to rotate smoothly when landing. The hydraulic hose 135 is routed so as to pass through the lower edge of the shielding plate 112 and pass above the hose protector 146. Therefore, although the hydraulic hose 135 is in a state along the lower surface of the cross member 14 at the lower limit position of the platform 17 and the cross member 14,
At the lower limit position of the platform 17, the hose protector 146 is in a horizontal state and comes into contact with the ground surface, and the hydraulic hose 135 passes over the hose protector 146. Therefore, the hydraulic hose 135 may be damaged by stones or protrusions on the ground surface. Disappears.

Next, the overall operation of the above embodiment will be described.

When the lifting device 5 is in the state J of FIGS. 1 and 13, the rod of the lifting hydraulic cylinder 21 is in the most contracted state, the inner post 12 is at the upper limit position, and is fixed on the cross member 14. The upper surface of the first step plate 16A is
It substantially coincides with the upper floor surface 3A of the entrance / exit 3. Further, the platform 17 is bent in a stepwise manner while the expanding hydraulic cylinder 41 is in a contracted state, and the lower surface of the second step plate 16C is supported by the lower frame 38. Also, the extension plate 7
0 is drawn under the second footboard 16C together with the lower frame 38, and the front plate 50 also serves as a car stop.
Overlaps the second step plate 16C in the state of being turned over, and functions as a step plate. In this state, platform 1
A normal passenger can get on and off using the first and second step plates 16A and 16C of 7 and the front end plate 50 that also serves as a car stop, and the bottom of the entrance / exit of the vehicle cut out to provide the lifting device 5 is: Left and right seal plates 86 and seal plate 10
It is securely closed at 0.

In order to raise or lower a wheelchair or the like, first, the locking hydraulic cylinder 93 is contracted to lower the lower frame 3.
8 is made free, and the platform 17 is driven from the staircase-shaped storage (bent state) to the flat-plate-shaped developed state as in the state U in FIG. That is, the hydraulic cylinder 41 for expansion is extended, and the lower frame 38 is raised by the parallel link mechanism 20 for expansion. At this time, the compression arm 34 and the tension arm 36 rotate clockwise, and at the upper limit position of the lower frame 38, the platform 17 on the lower frame deploys like a flat plate. At this time, the compression arm 34
The turning radius of the tension arm 36 is equal to the connecting plate 16B.
Since it is set to be larger than the turning radius of the lower frame 38, the lower frame 38 is in a state of protruding toward the tip side of the platform 17. The extension plate 70 is located on the tip side of the platform 17 to form a platform structure having a depth dimension (for example, 1100 mm or more) sufficient to mount a wheelchair or the like as a whole. In that case, FIG. 7 and FIG.
Like the plate lifting roller 72 to the extension plate 7
When 0 rides, the extension plate 70 is lifted by a predetermined amount, and the step with the tip of the platform 17 is reduced. At the same time when the platform 17 is unfolded, the car stop and tip plate 50 is rotated as shown in FIG.
Stand up with the work of 1. The unfolded platform 17 is moved to the state L shown in FIG. 13 by the extension movement of the lifting hydraulic cylinder 21.
The lower frame 38 can be lowered to a substantial landing position. At this time, hose protector 1
At 46, the hydraulic hose 135 is reliably protected.

In order to place a wheelchair or the like on the platform 17 and the extension plate 70 landing on the surface of the ground, the tip plate 50 also serving as a car stop needs to be in a down state. Therefore, as shown in FIG. The cylinder 62 is extended to lower the tip of the wheel stop / tip plate 50 (phantom line K in FIG. 13). In this state, the wheelchair or the like can be moved onto the extension plate 70 and the platform 17. At this time, the shielding plate 112 is also in a lowered position in conjunction with the lowering of the cross member 14, that is, the lowering of the platform rear end as shown in FIG. 13, and there is a space between the lower end of the fixed main body frame 10 and the platform rear end side. Shield the space. In this state, the user of the wheelchair who gets on the platform looks at the shielding plate 112 and sees it.
2) The wheelchair can be easily operated by grasping the distance between the wheelchair and the wheelchair, and the wheelchair can be moved onto the platform 17 (a trolley other than the wheelchair and other luggage can be mounted if necessary). Further, the shielding plate 112 is also useful for improving safety when getting on and off the wheelchair. Furthermore, if the shielding plate 112 is made of a material such as stainless steel having a mirror surface, it becomes easier for the wheelchair user to check the feet.

As shown in FIG. 7, when the platform 17 is lifted with a wheelchair or the like placed, the undulating double-acting hydraulic cylinder 6 is used.
2 is contracted to erect the car stop and tip plate 50 (phantom line M in FIG. 13), and the lifting hydraulic cylinder 21 is contracted while maintaining the deployed state of the platform 17 and the car stop and tip plate 50 in an upright state. By. As a result, the inner post 12 rises to the upper limit position in the outer post 11, the platform 17 and the vehicle-side entrance / exit upper floor surface 3A are at the same height, and the platform 17 and the wheelchair are placed on the upper floor surface 3A. Can be moved.

On the contrary, a wheelchair or the like can be transferred to the ground by placing a wheelchair or the like on the platform 17 and the extension plate 70 at the upper limit position from the vehicle side and lowering the platform 17. When the platform 17 descends, the tip plate 50 that also serves as a car stop stands up to prevent the wheelchair or the like from falling. After the landing of the platform 17, the tip end of the wheel stop and tip plate 50 can be lowered to move the wheelchair or the like to the ground side.

After the lifting of the wheelchair and the like is completed, the inner post 11 is returned to the upper limit position and the deploying hydraulic cylinder 41 is contracted, so that the platform 17 is re-staired as in the state J of FIGS. 1 and 13. And the extension plate 7
0 is stored.

The structure of the above embodiment has the following features.

(1) The platform 17 has a staircase shape for normal passengers getting on and off, and in the case of a wheelchair or the like, the step plates 16A, 16C and the connecting plate 16B have a flat plate shape, and the extension plate 70 is provided together with the lower frame 38. The platform 17 is moved up and down in a state in which it is pushed out to the tip side of the second step plate 16C. Therefore, it can be attached to a normal entrance / exit of a low-floor bus or the like, and the projection of the extension plate 70 can sufficiently increase the depth of the platform for mounting a wheelchair or the like. In addition, lifting and lowering of the flat plate-shaped platform is performed by the outer post 11
This can be performed by driving the inner post 12 that can slide freely in the vertical direction (vertical direction) with the hydraulic cylinder 21 for lifting and lowering, so that there is no lateral movement when the platform moves up and down, and it is possible to get on and off a wheelchair in a narrow place. It is possible.

(2) The shield plate 112 is fixed to the main body frame 1
Since it is provided so as to be slidable vertically with respect to 0 and is biased upward by the extension spring 116, the shield plate 112 can be raised and lowered in conjunction with the elevation of the cross member 14, and fixed by the shield plate 112. An empty space between the lower end of the main body frame 10 and the rear end side of the platform can be shielded, and a user of a wheelchair who gets on the platform can look at the shield plate 112 and grasp the distance between the shield plate 112 and the wheelchair. Wheelchair operation is easy. Further, the shielding plate 112 is also useful for improving safety when getting on and off the wheelchair. Furthermore, the shield plate 1
If 12 is made of a mirror surface material such as stainless steel, it becomes easier for the wheelchair user to check the feet.

(3) The hose protector 146 is pivotally supported on the lower side of the platform 17 so that the hose protector 146 is positioned below the hydraulic hose 135 when the platform 17 is lowered to the lower limit position. The hose 135 can be reliably prevented from being damaged.

(4) When the inner post 12 is stored in the outer post 11 and the platform 17 is also stored, such as when the vehicle is traveling, the bottom opening of the entrance / exit 3 (the lower surface opening of the lifting device 5) is left and right. The seal plate 86 that is in contact with the seal plate 86 and the elastic seal member 101 can close the gap, and dust and rainwater can be prevented from entering.

[0040]

As described above, according to the present invention,
When the passengers get on and off, the platform can be stepped, and in the case of a wheelchair, etc., the platform can be used as a flattened state, so that the wheelchair, etc. can get on and off the platform smoothly and easily, and safety and reliability can be improved. It is also possible to obtain an excellent lifting device.

[Brief description of drawings]

FIG. 1 is a side sectional view of an embodiment of an elevating device according to the present invention when a platform has a step shape.

FIG. 2 is a partial plan view showing a part of the same in section.

FIG. 3 is a front view of the same portion.

FIG. 4 is a second example of the lower frame in the embodiment.
FIG. 3 is an enlarged side view of the essential parts showing the mounting structure of the footboard of FIG.

FIG. 5 is a front sectional view of the same.

FIG. 6 is an enlarged cross-sectional side view of essential parts showing a state in which the front end plate also serving as a car stop and a mechanism portion for driving the front end plate also serving as a car stop are turned over and overlapped with the second step plate in the embodiment.

FIG. 7 is an enlarged side cross-sectional view of a main part showing a state in which the front end plate also serving as a car stop and a mechanism portion for driving the front end plate also serving as a car stop are erected in the embodiment.

FIG. 8 is an enlarged side cross-sectional view of a main part showing a state in which the front end plate also serving as a car stop and a mechanism portion for driving the front end plate also serving as a car stop are turned down in the embodiment.

FIG. 9 is an enlarged side view showing a mounting state of a shield plate, a seal plate and a hose protector in the embodiment.

FIG. 10 is an enlarged side cross-sectional view of a mounting portion of a shielding plate in the example.

FIG. 11 is an enlarged plan view of the same.

FIG. 12 is a plan view showing an arrangement of a swivel joint and a hose protector.

FIG. 13 is a side sectional view for explaining the operation of the embodiment.

FIG. 14 is a side view showing a shared bus as an example of a passenger vehicle equipped with a lifting device.

[Explanation of symbols]

1 Bus 2, 3 Entrance / Exit 10 Fixed Main Body Frame 11 Outer Post 12 Inner Post 13 External Connection Member 14 Cross Member 17 Platform 20 Parallel Link Mechanism for Deployment 21 Hydraulic Cylinder for Lifting 34 Compression Arm 36 Tension Arm 38 Lower Frame 41 Hydraulic for Deployment Cylinder 50 Tip plate that also serves as a car stop 51 Car stop rotation mechanism 62 Double-acting hydraulic cylinder for undulation 70 Extension plate 72 Plate pushing roller 86,100 Seal plate 101 Elastic seal member 111 Slide receiver 112 Shield plate 116 Extension spring 130,140 Swivel joint 135, 136 hydraulic hose 145 protector mounting arm 146 hose protector

Claims (3)

[Scope of utility model registration request] 1. A fixed main body frame fixed to the entrance / exit side of a vehicle, a pair of fixed posts vertically erected and fixed to the fixed main body frame, and a pair of fixed posts provided so as to be vertically movable. An elevating member, a cross member that connects between the lower end portions of the pair of elevating members, a platform that sequentially connects a step plate and a connecting plate, and a rear end is attached to the cross member side, and the step plate of the platform. The parallel link mechanism for deployment and the hydraulic cylinder for deployment for changing the storage state in which the staircase and the connecting plate are stepwise from the stored state to the flattened state, and are provided so as to be able to move up and down with respect to the fixed main body frame and upward by a spring. And is moved up and down as the cross member moves up and down to block an empty space between the lower end of the main body frame and the rear end side of the platform. An elevating device comprising: a shielding plate for shielding. 2. A hose protector is obliquely supported on a support frame fixed to the cross member, and the hose protector covers the lower side of the cross member in a lowered position of the cross member. The lifting device according to claim 1, wherein the hydraulic hose passing between the hose protector and the hose protector is protected. 3. An elastic seal member on the fixed main body frame side, wherein a seal plate extending rearward is fixed to a lower frame included in the parallel link mechanism for deployment, and the seal plate is provided when the platform is in a retracted state. The elevating device according to claim 1, wherein the elevating device is configured to be brought into contact with the.