JPH051472Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an elevating device that is attached to the entrance of a vehicle such as a bus to facilitate the boarding and alighting of a wheelchair or the like by raising and lowering the platform.

(Prior art and problems) Conventionally, when a wheelchair lifting device is installed in a passenger vehicle such as a bus, an opening is provided separately from the entrance for passengers to get on and off the vehicle, and the wheelchair lifting device is installed in this opening. I was trying to set up a device. This is because the conventional wheelchair elevating device simply raises and lowers a flat platform, and therefore cannot be used for normal boarding and alighting of passengers.

For this reason, when the wheelchair elevating device is stored, the space inside the room becomes small, and since a passage is required at the opening, the layout of the passage and the seats in the room is functionally inconvenient.

(Means for Solving the Problems) In view of the above points, the present invention provides a step-like platform for passengers to get on and off the platform, and allows the platform to be used as a flat platform for wheelchairs, etc. There is no need to separately provide a special opening,
Therefore, it is an object of the present invention to provide an elevating and lowering device that can effectively arrange indoor aisles and seats without deteriorating the transportation function, and that also has improved reliability of operation.

The present invention consists of a main body frame fixed to the entrance/exit side of a vehicle, an upper frame supported to the main body frame so as to be able to rise and fall via a parallel link mechanism for elevating and descending consisting of a main arm and a sub arm, and a footboard. a platform having a first connecting plate and a second connecting plate pivotally connected on both sides thereof, and a rear end of the first connecting plate being pivotally connected to the upper frame; and an undulation at the tip of the platform. In order to change the step plate and the first and second connecting plates of the platform from a step-like folded state to a flat plate-like unfolded state, one end of each is attached to the upper frame. a first link pivotally connected to a first link and a second link parallel thereto;
between a lower frame pivotally attached to the other end of the link and connected to the front end side of the platform, and pivot points on the diagonal lines of the four pivot points forming a parallelogram of the first and second links. a parallel link mechanism for deployment having a hydraulic cylinder for deployment disposed; a following mechanism for causing the first connecting plate to follow the rotation of the parallel link mechanism for deployment; and a footplate support mechanism having a footplate support arm mounted and supported at a substantially intermediate position of the first or second link so as to support it from below.

Further, the following mechanism is pivotally connected to an engagement protrusion formed along the longitudinal direction of the first link of the deploying parallel link mechanism and a mounting plate fixed to the first connecting plate. The above-mentioned problem is solved by a configuration including a guide roller that can be freely engaged with the engagement protrusion.

(Function) In the lifting device of the present invention, the platform is composed of three plates: a foot plate, and a first connecting plate and a second connecting plate pivotally mounted on both sides of the foot plate. When a normal passenger gets on and off the platform, the platform is shaped like a staircase, and when a wheelchair or the like is used, three plates are used as a flat plate to move the platform up and down. Therefore, it can be attached to a normal entrance/exit.

In addition, in order to improve the reliability of operation, we have added a tracking mechanism that causes the first connecting plate of the platform to follow the rotation of the parallel link mechanism for deploying the platform, and a tread plate that supports the tread plate when the platform is folded into a stair-like shape. A support mechanism is provided to ensure that the platform can be repeatedly driven from a stepped folded state to a flat unfolded state or vice versa.

(Example) Hereinafter, an example of the elevating device according to the present invention will be described with reference to the drawings.

1 to 4 show the configuration of the lifting device, and FIG. 5 shows an example of a bus as a vehicle to which the lifting device is installed.

As shown in FIG. 5, entrances 1 and 3 are provided on the side of the bus body 5, and opening/closing doors 7 and 9 are provided, respectively. The elevating device of the present invention is usually attached to the rear entrance 3.

As shown in Figures 1 to 4, the elevating device is the entrance 3 of the bus body (the upper floor of the entrance is indicated by 3A).
A main body frame 10 fixed to the side, a side frame 11 supported so as to be able to rise and fall freely with respect to the main body frame 10 via a parallel link mechanism for elevating and lowering, an upper frame 12 integrated therewith, and a footboard 13
The upper frame 1 has a first connecting plate 14 and a second connecting plate 15 pivotally mounted on both sides of the upper frame 1.
2, a platform 16 whose rear end is pivotally attached to the platform 16; a footboard-cum-vehicle stop plate 17 provided at the tip of the platform so as to be able to rise and fall; and the platform 16.
It is equipped with a parallel link mechanism for unfolding to change the folded state from a step-like folded state to a flat-plate unfolded state.

The main body frame 10 is arranged on both sides of the entrance/exit 3, and one ends of a main arm 20 and a sub-arm 21 forming parallel links for elevating and descending are pivotally supported (rotatably supported) thereon. That is, the main arm 20 is fixed to a rotating shaft 22 that is supported by the main body frame 10, and the sub arm 21 is attached to a pin 2.
3, it is attached to the main body frame 10. The other ends of the main arm 20 and the sub-arm 21 are pivotally attached (rotatably attached) to the side frame 11 with pins 24 and 25. The rotating shaft 22 to which the main arm 20 is fixed has a third
As shown in the drawings and FIG. 4, a driving arm 26 is fixed, and a rod of a lifting hydraulic cylinder 27 is connected thereto. The rear end of the lifting hydraulic cylinder 27 is pivotally attached to the main body frame 10 side.

As a result, as the lifting hydraulic cylinder 27 extends and retracts, the upper frame 12 descends or rises while maintaining a horizontal state.

The connecting plate 14 of the platform 16, the tread plate 13 and the connecting plate 15, and the car stop plate 1 which also serves as a tread plate.
7 are connected to each other by hinges or the like, and have a predetermined width and tread allowance so that they can form stairs at the entrance/exit. Bent portions 28 and 29 are formed on both sides of the footboard 13 and the connecting plate 15 for reinforcement.

The expansion parallel link mechanism includes a first link 32 pivotally connected between the upper frame 12 and the lower frame 31 and a second link 3 parallel to the first link 32.
3, and an expansion hydraulic cylinder 35 disposed between diagonal pivot points of four pivot points forming a parallelogram of these links 32 and 33.

As the expansion hydraulic cylinder 35 extends and retracts, the lower frame 31 rises or falls while maintaining a horizontal state.

At the tip of the lower frame 31, the tip of the platform 16 and a car stop plate 17 that also serves as a footboard are attached.
A connecting shaft 36 is pivotally supported on the lower frame 31, and a car stop hydraulic cylinder 40 for raising and lowering the car stop plate 17 is attached to the lower surface of the lower frame 31, and the tip rod of the cylinder 40 is connected to the car stop plate 17 bracket 41. has been done.

The first link 32 and the first connecting plate 14 are provided with a following mechanism that causes the first connecting plate 14 to follow the rotation of the first link 32. That is,
As shown in FIGS. 6 and 7 (when the first link 32 is in a horizontal state), an engaging protrusion 50 is integrally fixedly formed along the upper edge of the first link 32, and the first link 32 is in a horizontal state. A mounting plate 51 is fixed to the lower surface of the plate 14, and a guide roller 52 is pivotally mounted to the mounting plate 51. The guide roller 52 is capable of engaging with the engagement protrusion 50, and moves the footboard 13 and the first and second connecting plates 14, 15 constituting the platform 16 from the flat plate-like unfolded state shown in FIG. The guide roller 52 is forcibly pulled down by the protrusion 50 during the movement of the unfolding parallel link mechanism when folding into a stepwise shape, that is, the counterclockwise rotation movement of the first link 32, and the first connecting plate 14 The first
Follow the link 32.

Further, as shown in FIG. 8, a tread support mechanism for supporting the tread when the platform 16 is folded into a step-like shape is added to the deploying parallel link mechanism. That is, the lower right end of the footboard support arm 55 is pivotally connected to the substantially middle portion of the second link 33, and the upper right end of the arm 55 is pivotally connected to the first link 33.
Lower frame 31 on the same axis as one end of link 32
It is pivotally connected to an additional link 56 which is pivotally connected to.
In this case, as shown in the imaginary lines in FIGS. 1 and 8, the tread support arm 55 is moved in the lateral direction of each link 32, 33 when the tip of the parallel link mechanism for deployment is vertically lowered and the platform 16 becomes stair-like. It protrudes to support the footboard 13 from below, and becomes approximately parallel to the links 32, 33 so as not to get in the way when the platform is deployed horizontally.
In the figures and FIG. 4, illustration of the arm 55 and link 56 is omitted. ).

In the configuration of the above embodiment, the lifting device is the first
In the state shown in the figure, the rod of the lifting hydraulic cylinder 27 is in the most retracted state, the lifting parallel link is in the raised position, and the upper surface of the upper frame 12 is approximately aligned with the upper floor surface 3A of the entrance/exit door 3. There is. Further, the deploying hydraulic cylinder 35 and the car stop hydraulic cylinder 40 are also in the retracted state, the lower frame 31 is in the lowered position, and the engagement protrusion 50 on the first link 32 side and the guide roller 50 on the first connecting plate 14 side , and the protrusion of the footplate support arm 55 causes the
As a result, the connecting plate 14 is guided vertically and the tread plate 13 is guided horizontally, so that the platform 16 is bent in a step-like manner, and the tread plate/car stop plate 17 is horizontal and functions as a tread plate. In this state, the footboard 13 of the platform 16 and the car stop plate 1 that also serves as a footboard are
7 can be used for normal boarding and alighting of passengers.

When lifting or lowering a wheelchair, etc., first extend the parking hydraulic cylinder 40 to erect the parking plate 17 as shown in FIG. to raise the lower frame 31. As a result, the platform 16 on the lower frame unfolds like a single flat plate. After the platform 16 is fully expanded, the lifting hydraulic cylinder 27 is extended.
The platform 16 is lowered by the force of the spring in the cylinder 27 and by gravity and lands as shown in FIG.

In order to place a wheelchair or the like onto the platform 16 on which it has landed, the wheel stopper plate 17 must be in the down position. Therefore, after landing, the vehicle stop hydraulic cylinder 40 is retracted.

The operation of loading a wheelchair or the like from the ground onto the platform 16 and carrying it onto the upper floor surface 3A of the boarding/alighting entrance can be carried out by carrying out the above-mentioned operations in reverse.

(Effects of the invention) As explained above, according to the invention, the platform can be used as a staircase when passengers get on and off the platform, and the platform can be used as a flat plate in the case of wheelchairs, etc., and a special opening can be used. There is no need to provide a separate section, so interior passageways and seats can be effectively arranged without degrading the transportation function, and the reliability of the platform's expansion into a flat plate shape and folding into a staircase shape is improved. Lifting equipment can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a side view of an embodiment of the lifting device according to the present invention, in which the platform is in the form of stairs;
The figure is a side sectional view with only the car stopper plate standing up, Figure 3 is a side sectional view with the platform deployed, and Figure 4
The figure is a side cross-sectional view of the platform when it has landed, Figure 5 is a side view of the bus as a vehicle equipped with a lifting device, and Figure 6 is a tracking system in which the first connecting plate follows the rotation of the parallel link mechanism for deployment. Side view of the mechanism, No. 7
The figure is a cross-sectional view taken from the side shown in FIG. 6, and FIG. 8 is a side view of the footboard support mechanism that supports the footboard. 1, 3... Entrance/exit, 10... Body frame, 1
1...Side frame, 12...Upper frame, 13...Tread plate, 14, 15...Connection plate, 1
6...Platform, 17...Car stop plate, 20
...Main arm, 21...Sub arm, 27...
... Hydraulic cylinder for lifting, 31 ... Lower frame, 32, 33 ... Link, 35 ... Hydraulic cylinder for expansion, 40 ... Hydraulic cylinder for car stop, 50
...Engagement protrusion, 51...Mounting plate, 52...Guide roller, 55...Tread support arm, 56...
...Additional links.

Claims (1)

[Scope of claim for utility model registration] Main body frame 10 fixed to the entrance/exit side of the vehicle
and an upper frame 1 that is supported in a vertically movable manner with respect to the main body frame via a parallel link mechanism for raising and lowering consisting of a main arm 20 and a sub arm 21.
2, a platform 16 having a footboard, a first connecting plate and a second connecting plate pivotally connected to both sides thereof, and a rear end of the first connecting plate being pivotally connected to the upper frame 12; and a tread-cum-vehicle stop plate 17 provided at the tip of the platform so as to be able to rise and fall freely, and for changing the tread plate and the first and second connecting plates of the platform 16 from a step-like folded state to a flat plate-like unfolded state. a first link whose one end is pivotally connected to the upper frame 12, and a second link parallel to the first link;
and a lower frame 3 pivotally attached to the other end of the second link and connected to the front end side of the platform.
1, and a deployment hydraulic cylinder 35 disposed between diagonal pivot points of four pivot points forming a parallelogram of the first and second links; a following mechanism for causing the first connecting plate to follow the rotation of the deploying parallel link mechanism; and a following mechanism attached to the substantially intermediate position of the first or second link so as to support the footboard from below in the folded state. a footplate support mechanism having a supported footplate support arm 55; the follower mechanism includes an engagement protrusion 50 formed along the longitudinal direction of the first link of the deployment parallel link mechanism; An elevating device characterized by having a guide roller 52 which is pivotally connected to a mounting plate 51 fixed to a first connecting plate and can be freely engaged with the engagement protrusion 50.