JPH04169340A - Elevating device - Google Patents

Abstract

PURPOSE:To enable getting on and off of a wheelchair in a small space by making a platform like a staircase when a passenger gets on and off, and making the platform in the plate-like spread state and vertically elevating the plateform in case of the wheel-car or the like. CONSTITUTION:In a normal state, normal getting on and off of passengers is performed using the first and second stepboards 16A, 16B and a buffer stop plate 18 also used as a stepboard of a platform 17. In the case of executing elevation of a wheelchair or the like, first a double acting hydraulic cylinder 62 for buffer stop is elongated to erect the buffer stop plate 18 as indicated in a virtual line H. Subsequently, a hydraulic cylinder 41 for spread is operated to raise a lower frame 38 by a parallel link mechanism 20 for spread. At this time, a main arm 34 and a sub-arm 36 are turned clockwise, and at the rising limit positions thereof, the platform 17 on the lowerframe 38 is spread like one sheet plate. On the other hand, the spread platform 17 can be lowered to the grounding position of the lower frame 38 by the elongation of an elevating hydraulic cylinder 21.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an elevating device that is attached to the entrance of a passenger vehicle such as a bus and is used to facilitate boarding and alighting of a wheelchair or the like by raising and lowering a platform.

(Prior art and problems to be solved by the invention) Conventionally,
When a wheelchair elevating device is provided 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 elevating device is provided in this opening. 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 vehicle becomes small, and since a passage is required at the opening, the layout of the passage and the seats inside the vehicle is functionally inconvenient.

In view of the above-mentioned points, the present invention makes the platform step-like when passengers get on and off, and the platform can be used as a flat plate-like unfolded state for wheelchairs, etc., and there is no need to separately provide a special opening. Therefore, it is an object of the present invention to provide an elevating device that can effectively arrange passages and seats in a room without deteriorating the transportation function, and that is compact and can reduce the installation space.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides (a) a main body frame fixed to the entrance/exit side of a vehicle; (b) a main body frame erected vertically to the main body frame. (c) a movable post provided on the pair of fixed posts so as to be able to rise and fall freely; (d) a lifting cylinder that drives the movable post up and down; (e) the pair of movable posts. a cross member that connects the lower end sides of the posts; ) a main arm and a sub-arm forming parallel links, each of which has one end pivoted to the lower end side of the movable post;
It has a lower frame pivotally attached to the other ends of the main arm and the sub arm, respectively, and by attaching the tip of the platform to the tip of the lower frame, the footboard and the connecting plate of the platform are bent into a stepped shape. The main arm is configured to include a deploying link mechanism for changing the main arm from a state to a flat-plate deployed state; and (h) a deploying cylinder for rotating the main arm.

(Function) In the elevating device of the present invention, the platform has a structure in which a connecting plate and a footboard are sequentially connected. and,
For normal passengers to get on and off the platform, the platform is shaped like stairs, and for wheelchairs and the like, the connecting plates and footboards are shaped like flat plates to move the platform up and down. Therefore, it can be installed at a normal entrance/exit. In addition, the flat platform can be raised and lowered by driving a movable post that can slide vertically (vertically) relative to a fixed post with a lifting cylinder, and the platform does not move horizontally when raised or lowered. It is possible to get in and out of a wheelchair, etc. in a narrow space.

In addition, if a single-acting hydraulic cylinder that has a refueling port at the upper end of the piston rod and operates in the direction of retracting the piston rod is used as the lifting cylinder for driving the movable post up and down, the oiling hose etc. of the lifting cylinder can be used. The length of the fixed post that guides the movable post can be minimized without interfering with the vertical movement of the movable post. In other words, conventional single-acting cylinders have a refueling port on the main body, so if a movable post is installed on the outer periphery of the single-acting cylinder, the range of vertical movement of the movable post cannot be increased. If the cylinder is located at the upper end, the presence of the cylinder will not narrow the range of vertical movement of the movable post.

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

1 to 7 show the structure of the lifting device, and FIG. 8 shows an example of a bus as a vehicle to which the lifting device is installed.

As shown in Figure 8, on the side of the bus 1 there are entrances 2 and 3.
The elevating device 5 of the present invention is attached to one of the entrances and exits 2, for example.

As shown in FIGS. 1 to 7, the elevating device 5 includes a main body frame (horizontal frame 10) fixed at a lower position of the bus entrance 2 (the upper floor surface of the entrance is indicated by 2A), and a Outer posts 11 as a pair of fixing posts vertically fixed to the main body frame 10 so as to be located on both sides of the body frame 10, and each hollow square pipe shaped outer post 11.
an inner post 12 as a movable post provided slidably therein; an external connecting member 13 fixed to the lower end of the pair of inner posts and protruding to the outside of the outer post 11; A cross member 14 that integrally connects connecting members, a first connecting plate 15A, a first footboard 16A, and a second connecting plate 15.
B. A platform 17 formed by sequentially connecting second footboards 16B via hinges and having a rear end pivoted to the cross member side, and a car stop plate 18 in front of the footboards provided at the tip of the platform so as to be able to rise and fall freely. , a parallel link mechanism for deployment 20 for changing the platform 17 from a stepped folded state to a flat unfolded state.

As shown in FIGS. 3 and 4, the lifting hydraulic cylinder 21 for driving the inner post 12 up and down includes a piston 23 that slides inside the cylinder body 22 and a hollow piston rod 24 that is integrated with the piston. By using the inside of the hollow piston rod 24 as an oil supply passage 25, a single-acting hydraulic cylinder having an oil supply port 26 at the upper end of the piston rod and operating in the direction of retraction of the piston rod is constructed. are doing. Such a lifting cylinder 21 is disposed inside the inner post 12 in the shape of a hollow rectangular pipe, and the upper end of the piston rod is pivotally supported on the upper end of the inner surface of the outer post 11 via a bracket 27. is inner boss 1 in bin 28
It is pivotally attached to the lower end of 2. A sliding member 29 made of nylon resin or the like is fixed to the upper part of the inner post 12 so as to be in contact with the inner surface of the outer post so as to slide smoothly inside the outer post 11 without rattling.

As shown in FIG. 6, a vertical slit groove 30 is formed on one side of the outer post 11, and external connecting members 1 are fixed to the lower ends of the inner posts 12, respectively.
3 is the outer bost 1 through the slit arm 30.
It protrudes outside of 1.

As shown in FIG. 1, an upper plate 32 is fixed on the cross member 14 which is fixed by welding between the lower ends of a pair of inner posts, that is, between the outer connecting member 13, and the rear end of the platform 17 is fixed to the upper plate 32. It is pivotally connected via a hinge. Further, a main shaft 33 is pivotally supported at a position below the cross member 14 by the pair of external connecting members 13, and the parallel link mechanism 20 for deployment is attached to the main shaft 33.
A main arm 34 forming one link of the main arm 34 is fixed, and a small arm 35 is also fixed. One end portion of the sub-arm 36 forming the other link of the parallel link mechanism 20 for deployment is pivotally attached to the bracket portion 37 of the external connection member 13.

The deployment parallel link mechanism 20 includes a main arm 34, a sub arm 36, a lower arm 38, and an auxiliary link 4.
5 and an opening/closing auxiliary member 46, the other ends of the main arm 34 and the sub arm 36 are each pivotally connected to a lower frame 38. The second footboard 16B of the platform 17 is connected to the lower frame 38.
The mounting is fixed on the top. The opening/closing auxiliary member 46 is for assisting the bending and unfolding of the first footboard 16A, and is pivotally mounted at an intermediate position of the main arm 34, and the auxiliary link is provided between the opening/closing auxiliary member 46 and the lower frame 38. 45 are connected. The auxiliary link 45 constitutes a link parallel to the main arm 34. Note that a rib 36A for preventing a wheelchair or the like from falling is integrated into the sub-arm 36.

A cylinder box 40 is fixed to one of the external connecting members 13 , the main body of a hydraulic cylinder for deployment 41 is pivotally supported by the cylinder box 40 , and the tip of the piston rod is connected (pivotally attached) to the small arm 35 . As a result, when the expansion hydraulic cylinder 41 is extended, the main arm 34 and the sub-arm 36 are in a hanging state, and when it is linearly moved, the main arm 34 and the sub-arm 36 are in a horizontal state by rotating 90 degrees.

Therefore, along with the wheel movement and extension movement of the deployment hydraulic cylinder 41,
The lower frame 38 rises or falls while maintaining a horizontal state.

In order to reliably move the platform 17 from the stepwise bent state to the flat plate-like unfolded state and vice versa, a bar-shaped cam 50 is fixed to one side of the main arm 34 as shown in FIG. A roller 52 as a cam follower that can come into contact with the cam 50 is attached to a bracket 51 fixed to the back surface of the first connecting plate 15A.

As a result, the first connecting plate 15A is forcibly rotated as the main arm 34 rotates.

As shown in FIG. 5, at the tip of the lower frame 38, a small link 5 for raising and lowering is provided for attaching the foot plate/car stop plate 18 located on the tip side of the platform 17.
5 is rotatably supported at the lower end by a pin 56.

The small link 55 for raising and lowering moves within an angular range θ regulated by a stopper 58 fixed to an inclined member 57 on the lower frame 38 side and an upright stopper 59 at the tip of the lower frame 38. The right end portion of the bracket 60 fixed to the back surface of the tread/car stop plate 18 is pivotally connected to the upper end portion of the small link 55 with a pin 61.

The pin 61 serves as a pivot point for the car stop plate 18 that also serves as a footplate. A main body of a double-acting hydraulic cylinder 62 for car stopping for raising and lowering the car stopping plate 18 is pivotally supported inside the lower frame 38, and the end rod of the cylinder 62 is connected to the bracket 6.
0 by a pin 63.

In the state shown by the solid line in FIG. 5, the small link 55 is inclined toward the rear end of the platform and is in contact with the stopper 58. At this time, the foot plate/car stop plate 18 is in a horizontal state, and the second car stop plate 18 and the foot plate/car stop plate 18 are in a horizontal state. Since there is no hinge between the footboards 16B, they function as one flat footboard with substantially no protrusions or gaps. Further, when the rod of the double-acting hydraulic cylinder 62 for car stop is further wheeled from the position shown by the solid line in FIG. 5, the treadle/car stop plate 18 becomes in a prone state with its tip lowered, as shown by the imaginary line F. Conversely, when the convex portion of the cylinder 62 extends from the position shown by the solid line in FIG. 16B, and the tread plate/car stop plate 18 rotates around the pin 61, and its tip rises at the imaginary line H.
becomes a standing state.

The bottom surface of the entrance/exit 2 on the vehicle side is completely cut out so that the lower frame 38 of the lifting device 5 can land thereon.
There is a risk of dust and rainwater splashing in through the gaps. For this purpose, as shown in FIG. 6, sealing plates 66 with elastic sealing material 65 such as sponge pasted on the inside are attached to the left and right sides of the horizontal frame 10 via hinges 67. This seal plate 66 is attached to the entrance/exit 2 by a spring (not shown).
is biased in a direction that shields the bottom surface of the

Therefore, when the inner post 12 is stored in the outer post at the upper limit position as when the vehicle is running, the platform 17 becomes stepped as shown by the solid line in FIG.
and the horizontal frame 10. Further, since the seal plate 66 automatically opens when the inner post 12 is lowered, the lowering of the inner post 12 and the like is not hindered.

In the configuration of the above embodiment, when the lifting device 5 is in the solid line state shown in FIGS. Top plate 32 fixed on member 14
The upper surface substantially coincides with the upper floor surface 2A of the entrance/exit 2. Further, the deployment hydraulic cylinder 41 is in an extended state, the car stop hydraulic cylinder 62 is in an intermediate state, the platform 17 is bent in a step-like manner, the lower surface of the first footboard 16A is supported by the opening/closing auxiliary member 46, and the second footboard 16A is supported by the opening/closing assisting member 46. The lower surface of 16B is supported by being fixed on the lower frame 38.

Further, the car stop plate 18 which also functions as a foot plate is horizontal with the second foot plate 16B, and functions as a single foot plate. In this state, passengers can normally board and alight using the first and second footboards 16A and 16B of the platform 17 and the footboard-cum-vehicle stop plate 18. In addition, there is no protrusion such as a hinge between the tread plate/car stop plate 18 and the second tread plate 16B, thereby increasing the safety of passengers getting on and off the vehicle.

When lifting or lowering a wheelchair or the like, the platform 17 is driven from a stair-like bent state to a flat plate-like unfolded state as shown by the imaginary line J in FIGS. 1 and 7. That is, first, the double-acting hydraulic cylinder 62 for the car stop is extended, and the car stop plate 1 is moved.
8 stands up as shown by the imaginary line H in FIGS. 1 and 7, the deployment hydraulic cylinder 41 is operated, and the deployment parallel link mechanism 2
0 to raise the lower frame 38. At this time, the main arm 34 and sub-arm 36 rotate clockwise, and at their upper limit positions, the platform 17 on the lower frame unfolds like a single flat plate. .

The unfolded platform 17 is equipped with a hydraulic cylinder 21 for lifting and lowering.
Due to the extension movement of the lower frame 3 of the virtual line shown in FIG.
It can be lowered to a landing position of 8.

In order to place a wheelchair or the like on the platform 17 that has landed on the ground, the car stop plate 18 must be in a down position, so the double-acting hydraulic cylinder 62 for car stop is moved linearly to lower the tip of the car stop plate 18. I'll keep it. In this state, a wheelchair or the like can be moved onto the platform 17.

To raise the platform 17 with a wheelchair or the like on it, the car stopper plate 18 is raised by extending the car stopper hydraulic cylinder 62.
This is done by raising the platform 17 and maintaining the upright state of the car stopper plate 18 and linearly moving the lifting hydraulic cylinder 21. As a result, the inner post 12 moves inside the outer post 11 to the upper limit position. The top of the platform 17 and the upper floor surface 2A of the entrance/exit on the vehicle side are at the same height, and the upper floor surface 2A is raised from the platform 17.
You can move wheelchairs etc.

Conversely, by placing a wheelchair or the like from the vehicle side on the platform 17 at the upper limit position and lowering the platform 17, the wheelchair or the like can be moved to the ground. When the platform 17 is lowered, the car stop plate 18 stands up to prevent the wheelchair or the like from falling. After landing on the platform 17, the tip of the car stop plate 18 is lowered and a wheelchair or the like can be moved to the ground side.

After lifting the wheelchair, etc., the inner post 11 is returned to the upper limit position and the deployment hydraulic cylinder 41 is extended, and the platform 17 becomes step-like again as shown by the solid line in FIGS. 1 and 7. .

The structure of the above embodiment has the following features.

(1) For normal passenger boarding and alighting, platform 17
In the case of a wheelchair or the like, the connecting plate and the footboard are flat plate-shaped so that the platform 17 can be raised and lowered. Therefore, it can be installed at a normal entrance/exit. In addition, the flat platform can be raised and lowered by driving the inner post 12, which is slidable inside the outer post 11, in the vertical direction (vertical direction) with the lifting hydraulic cylinder 21, and when the platform is raised and lowered, it can be moved horizontally. It is possible to get in and out of a wheelchair, etc. in a narrow space without having to move.

(2) As the lifting hydraulic cylinder 21 for driving the inner post 12 up and down, a single-acting hydraulic cylinder that has an oil supply port at the upper end of the piston rod and operates in the direction of retracting the piston rod is used. The oil supply hose etc. of the hydraulic cylinder 21 do not interfere with the vertical movement of the inner post 12, and the outer circumference of the cylinder can be included in the movement range of the inner post 12, and the length of the outer post 11 that guides the inner post 12 can be It can be kept to the minimum necessary. In other words, in conventional single-acting cylinders, the oil filler port is located on the main body, so if an inner post is installed on the outer periphery of the single-acting cylinder, it is not possible to increase the vertical movement range of the inner post. This is because the presence of the cylinder at the upper end does not narrow the range of vertical movement of the inner post.

(3) The main arm 34 of the parallel link mechanism 20 for deployment is fixed to the main shaft 33, and the main shaft 3
3 is a mechanism for deploying the platform 17 by fixing a small arm 35 to the platform 17 and rotating the small arm 35 with a hydraulic cylinder 41 for deployment.
The width W of the upper plate 32 connected to the rear end side may be approximately the same width as the main arm 34, and this can sufficiently accommodate the case where the depth dimension of the entrance/exit is narrow.

(4) A structure is devised in which the treadle lid car stopper plate 18 is arranged in a flexible manner on the tip side of the platform 17, and no hinge is provided between the second footboard 16B of the platform 17 and the treadle cover car stopper plate 18. Therefore, when the foot plate lid car stop plate 18 is in a horizontal state, the foot plate lid car stop plate 18 and the second foot plate 16B can function as one flat foot plate with substantially no projections or gaps. Moreover, by using a double-acting hydraulic cylinder as the car stop cylinder 62, the foot plate cover car stop plate 18 can be driven from a horizontal state to an upright or down state.

(5) When the inner post 12 is stored in the outer post 11, such as when the vehicle is running, the bottom opening of the entrance/exit door 2 is covered with a sealing plate 66 to which an elastic sealing material 65 such as sponge is pasted. Since it is shielded, dust and rainwater can be prevented from entering.

(Effects of the Invention) As explained above, according to the present invention, the platform can be made into a staircase shape when passengers get on and off, and the platform can be used as a flat plate-like unfolded state in the case of a wheelchair or the like. Since vertical lifting and lowering operations are performed, it is possible to obtain a small lifting device that allows a wheelchair or the like to get on and off even if the empty space around the platform is small.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of the lifting device according to the present invention, in which the platform is in the form of stairs, and FIG. 2 is a plan view of the same.
Figure 3 is a side sectional view of the part where the lifting hydraulic cylinder is provided inside the outer bost, Figure 4 is a front sectional view of the part where the inner post and the lifting hydraulic cylinder are installed inside the outer bust, and Figure 5 is the tread plate. FIG. 6 is a partial front view of the embodiment; FIG. 7 is a front view for explaining the operation of the embodiment;
FIG. 8 is a side view showing a passenger bus as an example of a passenger vehicle equipped with a lifting device. DESCRIPTION OF SYMBOLS 1... Bus, 2.3... Entrance/exit, 10... Body frame, 11... Outer boost, 12... Inner post, 13... External connection member, 14... Cross member, 17...Platform, 18 Car stop plate for footboard lid, 20...Parallel link mechanism for deployment, 21...
Lifting hydraulic cylinder, 33... Main shaft, 34
...Main arm, 36...Sub arm, 38...
・Lower frame, 41... Hydraulic cylinder for deployment, 4
6...Opening/closing auxiliary member, 55...Small link for undulating, 62
...Double acting hydraulic cylinder for car stop, 65...Elastic sealing material, 66...Seal plate.

Claims (4)

[Claims] (1) A main body frame fixed to the entrance/exit side of the vehicle, a pair of fixed posts erected and fixed perpendicularly to the main body frame, and a movable post provided on each of the pair of fixed posts so as to be movable up and down. , a lifting cylinder that drives the movable post up and down, a cross member that connects the lower end sides of the pair of movable posts, a footboard and a connecting plate pivotally attached to both sides of the foot plate, and a foot plate that is connected to the cross member side. a platform whose rear end is pivotally connected; a main arm and a sub-arm forming parallel links whose one end is pivoted to the lower end side of the movable post; and a lower frame which is pivoted to the other end of the main arm and the sub-arm, respectively. a deploying link mechanism for changing the step plate and connecting plate of the platform from a step-like folded state to a flat plate-like unfolded state by attaching the platform end to the lower frame end; An elevating device characterized by comprising a deployment cylinder that rotates a main arm. (2) A single-acting hydraulic cylinder having an oil supply port at the upper end of the piston rod and operating in the retracting direction of the piston rod is used as the lifting cylinder, and the upper end of the piston rod is attached to the upper end of the fixed post, and 2. The lifting device according to claim 1, wherein a main body of a single-acting hydraulic cylinder is attached to a lower end of said movable post. (3) A main shaft is pivotally supported at a lower position of the cross member by an external connecting member fixed to the lower ends of the pair of movable posts, the main arm and the small arm are respectively fixed to the main shaft, and the external connecting member is fixed to the lower end of the pair of movable posts. The elevating device according to claim 1, wherein the small arm is rotated by a deployment cylinder supported on the member side to drive the deployment link mechanism. (4) A car stop plate that also serves as a foot plate is disposed on the tip side of the platform, the car stop plate that also serves as a foot plate is pivotally supported on the upper part of a small link for uphill movement whose lower part is pivotally supported on the side of the lower frame, and the car stop plate that also serves as a foot plate is 2. The elevating device according to claim 1, wherein the raising and lowering operation of the foot plate and car stop plate is performed by pushing up or lowering a bracket fixed to the lower surface of the plate using a double-acting hydraulic cylinder for raising and lowering.