JP2516416Y2 - lift device - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention is mounted on the entrance / exit of passenger vehicles such as railway passenger cars and buses, and is intended for the convenience of getting on and off a wheelchair and the like by lifting and lowering the platform. Lifting equipment.

(Problems to be solved by conventional techniques and devices) 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. A wheelchair lifting device was provided at the opening. This is because the conventional wheelchair lifting device only lifts and lowers a flat plate-shaped platform.
This is because it had a structure that could not be used for ordinary passengers getting on and off.

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

In view of the above points, the present invention makes it possible to use the platform as a staircase when passengers get on and off, and in the case of a wheelchair or the like, the platform can be used as a flat plate-shaped deployed state, and it is not necessary to separately provide a special opening. Therefore, it is an object of the present invention to provide an elevating device in which the passages and seats in the room can be effectively arranged without lowering the transportation function and the operation reliability is improved.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides: (a) a main body frame fixed to a vehicle entrance / exit side; and (b) a main arm and a sub-arm with respect to the main body frame. An upper frame supported movably up and down via an elevating parallel link mechanism and side frames integrated on both sides of the upper frame, and (c) a first connecting plate, a first step plate, and a second connecting plate. A plate in which a plate, a second step plate and a third connecting plate are sequentially connected, and a rear end of the first connecting plate is pivotally attached to the upper frame, and (d) the third connecting plate. (2) a stepping plate / car stop plate that is provided up and down freely at the tip of, and (e) first and second arms forming a pair of parallel or substantially parallel one end of which is pivotally attached to the upper frame, and the first and second arms. 2 a A lower frame pivotally attached to the other end of each of the first and second arms, and a hydraulic cylinder for deployment arranged between diagonal pivot points of the four pivot points of the first and second arms. And having the tip of the third connecting plate pivotally attached to the tip of the lower frame, the stepped bending of the first and second step plates and the first to third connecting plates of the platform. And a deployment link mechanism for changing the state to a flat plate-shaped deployment state. (F) Further, a cam is fixed to the first or second arm, and a rear end is pivotally attached to the upper frame. The first
A cam follower that can come into contact with the cam is provided on the connecting plate of
An extension spring is stretched between the second connecting plate and either one of the first and second arms, and (g) the first tread plate is supported from below in the bent state of the platform. An opening / closing assisting member that assists bending is pivotally attached to the first and second arms, respectively, and a link connecting body that protrudes above the lower frame and assists bending of the second step plate and the third connecting plate is provided. The second linking plate and the second linking plate, which are provided in the unfolding link mechanism and are bent in the body frame,
It supports the connecting corners of the footboard.

(Operation) In the lifting device of the present invention, the platform has a configuration in which the first connecting plate, the first step plate, the second connecting plate, the second step plate, and the third connecting plate are sequentially connected. And
When passengers get on and off normally, the platform has a staircase 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. that time,
For the first or second arm in the deployment link mechanism having the pair of first and second arms for changing the stepped plate and the connecting plate of the platform from the stepwise bent state to the flattened expanded state A cam follower that fixes the cam and is capable of contacting with the cam is provided on the first connecting plate at the rearmost end side of the platform, and supports the bending of the first step plate from below on the first and second arms. And an extension spring between the second connecting plate pivotally attached to the platform front end side of the first step plate and one of the first and second arms. And then project it to the upper side of the lower frame
By providing a link connecting body for assisting the bending of the step plate and the third connecting plate in the expanding link mechanism, even if the number of the connecting plates and the step plates increases, the stepped state can be changed to a flat plate shape. Operation to the deployed state and vice versa is certainly possible.

Further, in order to improve safety, it is possible to employ a configuration in which when the platform is in a flat plate-shaped deployed state, the deployment link mechanism is mechanically locked to maintain the deployed state.

(Embodiment) An embodiment of the lifting device according to the present invention will be described below with reference to the drawings.

1 to 6 show the structure of the lifting device, and FIG. 7 shows an example of a railway passenger car as a vehicle on which the lifting device is mounted.

As shown in FIG. 7, the passenger car 1 is provided with the entrances and exits 2 and 3 on the side surface thereof, and the lifting device 5 of the present invention is attached to, for example, one of the entrances and exits 3.

As shown in FIGS. 1 to 6, the lifting device 5 includes a main body frame 10 fixed to the side of the passenger car up and down opening 3 (the upper floor of the entrance and exit is indicated by 3A), and the lifting and lowering with respect to the main body frame 10. Upper frame 12 supported by a parallel link mechanism for vertical movement and side frames 11 integrated on both sides of the upper frame 12.
And a first connecting plate 14A, a first step plate 13A, a second connecting plate
14B, a second step plate 13B and a third connecting plate 14C are sequentially connected via a hinge, and a platform 16 having a rear end pivotally attached to the upper frame 12 and a platform 16 are provided so as to be capable of undulating. Car stop plate 17
And a deployment link mechanism for shifting the platform 16 from a stepwise bent state to a flattened deployed state.

The main body frames 10 are arranged on both sides of the entrance / exit 3, respectively, and are main arms that form a parallel link for raising and lowering them.
One end of 20 and the sub-arm 21 is pivotally supported (rotatably supported). That is, the main arm 20 is the main body frame 10
Is fixed to the rotary shaft 22 supported by the
It is attached to the body frame 10 at 23. The other ends of the main arm 20 and the sub arm 21 are pivotally attached (rotatably attached) to the side frame 11 by pins 24 and 25.
Then, on the rotary shaft 22 to which the main arm 20 is fixed,
As shown in FIG. 3, the driving arm 26 is fixed, and the rod of the lifting hydraulic cylinder 27 is connected thereto. The rear end of the lifting hydraulic cylinder 27 is pivotally attached to the body frame 10 side.

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

The connecting plates 14A to 14C of the platform 16 and the tread plate 13
The step plate / car stop plate 17 connected to the tips of the A and 13B and the connecting plate 14C by a hinge has a predetermined lateral width and a step allowance so that a stairway at the entrance / exit can be configured. Then, for reinforcement, the second and third connecting plates 14B and 14C and the second step plate 13B.
Bent portions 28B, 28C, and 29 are formed on both sides of the fold portion (however, the fold portions are not shown in FIGS. 4 to 6).

The deployment link mechanism includes a lower frame 31, a tension arm 32 and a compression arm 33 as first and second arms that make a pair pivotally mounted between the upper frame 12 and the lower frame 31. Of the arm of the robot is arranged between the pivot points on the diagonal of the four pivot points of the parallelogram. However, in this embodiment, when the platform is deployed, the tension arm is arranged so that the tip of the platform does not hit the side sill (threshold) 3B below the vehicle side entrance / exit 3.
The lengths of 32 and the compression arm 33 are not equal to each other, and the perfect parallel link mechanism is not formed. Here, the tension arm 32 is slightly longer than the compression arm 33, and the platform can be deployed even in the narrow entrance / exit 3.

With the expansion and contraction of the expansion hydraulic cylinder 35, the lower frame 31 moves up or down while maintaining a substantially horizontal state. However, it becomes completely horizontal at the ascending end position.

At the tip of the lower frame 31, a connecting shaft 36 between the tip of the platform 16 and the wheel stop plate 17 that also serves as a tread is pivotally supported, and the lower surface of the lower frame 31 has a wheel stop plate.
A vehicle stop hydraulic cylinder 40 for undulating the vehicle 17 is attached, and a tip rod of the cylinder 40 is connected to a bracket 41 on the lower surface of the vehicle stop plate 17.

A bar-shaped cam 50 is fixed to one side of the tension arm 32 as shown in FIG. 4 in order to reliably execute the operation of the platform 16 from the stepwise bent state to the flattened expanded state and vice versa. Then, a roller 52 as a cam follower that is capable of abutting on the cam 50 is attached to a bracket 51 fixed to the back surface of the first connecting plate 14A.
As a result, the first connecting plate 14A is forcibly rotated as the tension arm 32 rotates. Further, an opening / closing assisting member 53 for supporting the bending and unfolding of the first tread 13A from below to assist the bending and unfolding of the first tread 13A is pivotally mounted at intermediate positions of the tension arm 32 and the compression arm 33, respectively.
Further, an extension spring 54 is stretched between the back side of the second connecting plate 14B and the compression arm 33. In addition, the second tread plate is projected to the upper side of the lower frame 31 in an inverted L shape.
A long link 55 for expansion assistance, which serves as a link connection body for assisting the bending of 13B and the third connection plate 14C, and a short link 56 for expansion assistance, which is connected to this, are connected between the compression arm 33 and the lower frame 31. Has been done.

Figure 5 shows the platform to improve safety.
7 shows a configuration of a lock mechanism that mechanically locks the deploying link mechanism and maintains the deployed state when 16 is in a flattened deployed state. In other words, the hook 60 is pivotally attached to the compression arm 33 of the deployment link mechanism by the pin 61, while the side frame 11 integrated with the upper frame 12 is provided.
Locking pin 62 to which the hook 60 should be hooked on the inner surface
Has been fixed. A lock releasing piece 64 is rotatably fitted around a shaft body 63 supporting the compression arm 33, and a point P of the hook 60 and a point Q of the lock releasing piece 64 are connected by a connecting rod 65 (rod). An end portion of 65 is pivotally attached to points P and Q.) An unlocking hydraulic cylinder 66 is fixedly supported on the vehicle side. The hook 60 is biased clockwise in FIG. 5 by the coil spring 67 shown in FIG.

In the lock mechanism of FIG. 5, the hook 60 is at the position of the virtual line R and is in the unlocked state when the deployment link mechanism is in the lower limit position and the platform 16 is bent stepwise. Now, when the tension arm 32 and the compression arm 33 rotate clockwise, since the taper 60A is formed at the tip of the hook 60, the taper 60A hits the locking pin 60, and the hook 60 rotates once to the left. Then, the locking pin 60 is automatically guided to the locking recess 60B of the hook 60, and as a result, the compression arm 33 is locked to the side frame 11 side. When the hook 60 is in the locked state, the unlocking piece 64 is in the position shown by the solid line in FIG. 5, so when the platform 16 is returned to the staircase, the unlocking hydraulic cylinder 66 is used.
Of the lock release piece 6
By rotating 4 to the imaginary line position in FIG. 5, the hook 60 also comes to the imaginary line position S and the lock can be released.

In order to prevent a wheelchair or the like from falling from the platform 16, a stopper plate 70 is erected by a spring on the upper surface of the upper frame 12 in addition to the car stop plate 17 on the platform front end side. This stopper plate 70
Is the sub arm at the upper limit position of the parallel link for lifting and lowering.
Although it is flatly laid down by the push-down plate 71 fixed to the 21, the push-down is released as the sub-arm 21 moves in the descending direction, and the stopper plate is released as in the case of the platform landing position in FIG. 70 is upright. The rotation range of the stopper plate 70 is within the range of the angle θ in FIG.
No more than a degree.

One of the elevating parallel links, that is, the portion of the main arm 20 that enters inside the side frame 11 has an MC
A slide plate 75 made of nylon or the like is fixed.
The slide plate 75 enters the clearance between the main arm 20 and the inner side surface of the side frame 11 (combination structure of two plates as shown in FIG. 2) at the upper limit position of the parallel link for elevation, and the main arm 20 rolls ( Rattling), which in turn can prevent the platform 16 from rolling.

As shown in FIG. 1, a hook 80 is pivotally supported on the main body frame 10 side in order to lock the locking pin 81 on the main arm 20 side at the upper limit position. Locking and unlocking of the hook 80 is performed by the unlocking hydraulic cylinder 82.

Further, a manual hydraulic pump operating portion 85 is arranged at the same height position as the upper floor surface 3A at the upper corner of the vehicle side entrance / exit 3. When the hydraulic control system for operating each hydraulic cylinder fails, the manual hydraulic pump operating unit 85 opens the upper lid 86 to allow the manual hydraulic pump to be operated, and the manual hydraulic pump functions to operate each of the hydraulic pumps as necessary. The hydraulic cylinder can be activated.

In the configuration of the above embodiment, when the lifting device 5 is in the state shown in FIG. 1, the rod of the lifting hydraulic cylinder 27 is in the most contracted state, the lifting parallel link is at the lift limit position, and the upper surface of the upper frame 12 is Is approximately the same as the upper floor 3A of the entrance / exit 3. Further, the expansion hydraulic cylinder 35 and the vehicle stop hydraulic cylinder 40 are also in the contracted state, the platform 16 is bent in a stepwise manner, and the connection corner portions of the second connecting plate 14B and the second step plate 13B are engaged with the main body frame 10. The car stop plate 17 that is supported and is also a tread plate is horizontal and functions as a tread plate. In this state, the first and second treads 13 of the platform 16 are
Ordinary passengers can get on and off using the A and 13B and the vehicle stop plate 17 that also serves as a tread.

When a wheelchair or the like is lifted or lowered, the platform 16 is driven from a stepwise bent state to a flattened deployed state as shown in FIG. That is, first, the car stop hydraulic cylinder 40 is extended, the car stop plate 17 stands up as shown by the imaginary line N in FIG. 4, and then the deployment hydraulic cylinder 35 is operated to raise the lower frame 31 by the deployment link mechanism. go.
As a result, the tension arm 32 and the compression arm 33 rotate clockwise, and at their upper limit position, the platform 16 on the lower frame deploys like a flat plate. No. 5 at the same time when the deployment of Platform 16 is completed
As shown in the figure, the hook 60 of the lock mechanism engages with the locking pin 62, locks the compression arm 33 with the side frame 11, and reliably maintains the expanded state.

In addition, prior to the deployment of the platform 16, the car stop plate 17
The reason for raising is to prevent the car stop plate 17 and the structure on the back surface thereof from hindering the deployment at the time of deployment.

The expanded platform 16 can be lowered to the landing position shown in FIG. 6 by the extension operation of the lifting hydraulic cylinder 27. At that time, since the sub arm 21 rotates in the descending direction, the pressing of the stopper plate 70 by the pressing plate 71 is released,
The stopper plate 70 is in the upright state by the spring force.

To put a wheelchair or the like on the platform 16 landed on the surface of the ground (or on the platform at the stop), the car stop 17
Since it is necessary to lie down, the car stop hydraulic cylinder 40 is contracted to lower the tip of the car stop plate 17. In this state, a wheelchair or the like can be moved onto the platform 16.

When the platform 16 is lifted with a wheelchair or the like placed thereon, the car stop hydraulic cylinder 40 is extended to erect the car stop plate 17, and then the platform 16 is unfolded and the car stop plate 17 is lifted.
Also, the lifting hydraulic cylinder 27 is contracted while maintaining the standing state of the stopper plate 70. In the ascending end position,
Since the push-down plate 71 on the side of the sub-arm 21 presses the stopper plate 70 flatly, the upper floor surface of the entry / exit gate on the vehicle side from the platform 16
Wheelchairs etc. can be moved to 3A.

Conversely, a wheelchair or the like can be moved to the ground (or a platform at a stop) by placing a wheelchair or the like on the platform 16 at the ascending limit position from the vehicle side and lowering the platform 16. When the platform 16 descends, the car stop plate 17 and the stopper plate 70 stand up to prevent the wheelchair from falling. After landing of the platform 16, the tip of the car stop plate 17 is lowered, and the platform 16 can be moved to the ground side.

After the lifting of the wheelchair etc. is completed, the hook 60 of the lock mechanism
Release and retract the hydraulic cylinder 35 for deployment,
As shown in the figure, the platform 16 is again stepped.

The structure of the above embodiment has the following features.

(1) The bar-shaped cam 50 is fixed to one side of the tension arm 32, and the bracket 5 is attached to the first connecting plate 14A on the platform side.
A roller 52 as a cam follower that fixes 1 and contacts the cam 50 is provided, and an opening / closing assisting member 53 that supports the first step plate 13A from below is provided on the tension arm 32 and the compression arm 33, and the second connection is further provided. An extension spring 54 is stretched between the plate 14B and the compression arm 33, and a link connection for projecting an inverted L shape above the upper lower frame 31 to assist the bending of the second step plate 13B and the third connection plate 14C. Since the long link 55 and the short link 56 for deployment assistance which are the body are provided, the four stairs can be deployed and reduced smoothly and reliably.

(2) A lock mechanism is provided that hooks the compression arm side hook 60 to the locking pin 62 on the side frame 11 side to mechanically lock the expansion link mechanism when the platform 16 is in a flat plate-shaped expanded state. Since the entire side frame is held horizontally, the deflection is extremely reduced and the load capacity can be increased. Further, since the deploying link mechanism is mechanically locked, it never shrinks even if there is a failure in the hydraulic system.

(3) Since the car stop plate 17 is provided on the front end side of the platform 16 and the stopper plate 70 is erected by a spring on the upper surface of the upper frame 12 to which the rear end of the platform 16 is pivotally attached, a wheelchair or the like on the platform can be installed. It can be surely prevented from falling. In addition, the car stop plate 17 can be driven by the car stop hydraulic cylinder 40 to be erected or laid down, and the stopper plate 70 can be automatically driven by the push-down plate 71 fixed to the sub arm 21 to be laid flat.

(4) Side frame consisting of two parallel plates in the raised position
A slide plate 75 made of MC nylon or the like is fixed to the main arm 20 that enters inside 11 and the slide plate 75 is interposed in the gap between the main arm 20 and the side frame 11 to prevent the main arm 20 from rolling laterally. As a result, the rolling of the platform 16 can be prevented.

(5) The compression arm 33 is made shorter than the tension arm 32 in the deployment link mechanism, so that the deployment operation can be executed so that the platform sill does not hit the side sill 3B even in the case of the entrance / exit 3 having a small depth dimension. .

(6) Since the manual hydraulic pump operating unit 85 is provided by utilizing the empty space of the entrance / exit 3, the manual hydraulic pump can be operated via the manual hydraulic pump operating unit 85 when the hydraulic control system fails. , The hydraulic cylinder can be operated.

In the above embodiment, the tension arm 32 and the compression arm 33 have different lengths as the expansion link mechanism.However, if the size of the entrance / exit has a margin, the lengths of the tension arm and the compression arm can be changed. An equalized parallel link mechanism can be adopted. Further, in principle, the cam 50 may be provided on either the tension arm or the compression arm.
One end of 54 may be provided on either the tension arm or the compression arm.

(Effect of the Invention) As described above, according to the present invention, the platform can be used as a staircase when passengers get on and off, and the platform can be used as a flat plate in a wheelchair or the like.
Moreover, even if the number of stairs is large, it is possible to surely perform the transition operation between the unfolded state and the staircase state, and it is possible to obtain the lifting device with high operation reliability.

[Brief description of drawings]

FIG. 1 is an embodiment of a lifting device according to the present invention, showing a side view when the platform is stepped, FIG. 2 is a front view showing the platform omitted, and FIG. 3 is an upper frame and a side frame. FIG. 4 is a side view showing a mechanism portion for moving up and down, FIG. 4 is a side view for explaining the expansion and contraction operation of the platform, and FIG. 5 is a side view for showing a lock mechanism for locking the expansion link mechanism to the side frame, FIG. 6 is a side view for explaining the overall operation, and FIG. 7 is a side view showing a passenger car of a railway vehicle as an example of a boarding / alighting vehicle equipped with a lifting device. 1 ... Passenger car, 3 ... Entrance / exit, 10 ... Main frame, 11 ... Side frame, 12 ... Upper frame, 13A, 13B ... Tread, 1
4A, 14B, 14C ... Connecting plate, 16 ... Platform, 17 ... Car stop plate, 20 ... Main arm, 21 ... Sub arm, 27 ... Lifting hydraulic cylinder, 31 ... Lower frame, 32 ... Tension arm, 33 ... Compression arm, 35 … Hydraulic cylinder for deployment, 40… Hydraulic cylinder for car stop, 50… Bar-shaped cam,
52 ... Roller, 53 ... Opening / closing assist member, 54 ... Extension spring, 60 ...
Hook, 62 ... Locking pin, 66 ... Hydraulic cylinder for unlocking, 70 ... Stopper plate, 71 ... Press plate, 75 ... Slide plate.

Claims (4)

(57) [Scope of utility model registration request] 1. A body frame (10) fixed to the entrance / exit side of a vehicle, and a body frame (10) capable of moving up and down via a parallel link mechanism for raising and lowering which comprises a main arm (20) and a sub arm (21). Upper frame (12) supported and side frames (11) integrated on both sides of the upper frame
And a first connecting plate (14A), a first step plate (13A), a second connecting plate (14B), a second step plate (13B) and a third connecting plate (14).
C) are sequentially connected, and the upper frame (1
2) A platform (16) to which the rear end of the first connecting plate (14A) is pivotally attached, and a tread plate / car stop plate (17) which is provided at the tip of the third connecting plate (14C) so as to be up and down freely. A pair of first and second arms that are parallel to each other and one end of which is pivotally attached to the upper frame (12), and a lower arm that is pivotally attached to the other ends of the first and second arms. A frame (31) and a deployment hydraulic cylinder (35) arranged between diagonal pivot points of the four pivot points of the first and second arms. , The first and second step plates (13A, 13B) of the platform (16) and the first to third connection plates by pivotally attaching the tip of the third connection plate (14C) to the end of the lower frame. (14A, 14B, 14C) and an extension to change from a staircase-folded state to a flattened state A link mechanism for use in fixing the cam to the first or second arm, and contacting the cam with the first connecting plate (14A) whose rear end is pivotally attached to the upper frame (12). A cam follower that can be freely connected is provided,
An extension spring is stretched between the second connecting plate (14B) and one of the first and second arms, and when the platform (16) is bent, the first tread plate (13A). ) Is supported from below and an opening / closing assisting member (53) for assisting bending is pivotally attached to the first and second arms, respectively, and protrudes above the lower frame (31) so as to project the second step plate (13B). And the third connecting plate (1
4C) is provided with a link connecting body for assisting the bending, and the connecting angle of the second connecting plate (14B) and the second step plate (13B) in the bent state in the main body frame (10). A lifting device characterized by supporting a part. 2. A locking mechanism is provided between the expanding link mechanism and the side frame to lock the expanding link mechanism on the side of the side frame when the platform is in a flat plate-like expanded state. Item 1. The lifting device according to item 1. 3. A stopper plate (70) is rotatably attached to the upper surface of the upper frame by a spring, and the stopper is provided by a push-down plate provided on the sub-arm (21) at the upper limit position of the elevating parallel link mechanism. The lifting device according to claim 1, wherein the plate is laid flat. 4. A slide plate (75) is fixed to the main arm (20), and the slide plate is attached between the main arm (20) and the side frame at an ascending limit position of the elevating parallel link mechanism. The elevating device according to claim 1, wherein the elevating device is interposed without rattling.