JP3996756B2 - Lifter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lifter that lifts and lowers a platform on which a wheelchair is placed.
[0002]
[Prior art]
Conventionally, as shown in FIG. 4, the rear chamber 702 of the one-box car 701 is provided with a lifter 703 that allows a wheelchair to be mounted in the vehicle interior.
[0003]
The lifter 703 includes a pair of extending arms 712 and 712 that extend from the rear opening 711 and a pair of first and second link arms 713 and 714 that are supported by ends of the extending arms 712 and 712. The support link arm 715 is supported by the first link arm 713, and the platform 716 is supported by the support link arm 715 and the first and second link arms 713 and 714. The lifter 703 includes an arm drive device (not shown). By operating the arms 713 to 715 by the arm drive device, the wheelchair on the platform 716 is moved to the rear chamber via the rear opening 711. It is configured to be able to move into 702.
[0004]
A plate-like flapper 721 having a length corresponding to the width dimension of the platform 716 is rotatably supported at the rear edge of the platform 716, and the free end of the flapper 721 is landed on the road surface. Or it is comprised so that the open state which adjoined can be formed. In this open state, the flapper 721 is configured to eliminate a step between the platform 716 and the road surface and to easily enter the wheelchair onto the platform 716.
[0005]
The platform 716 is provided with an operation lever 731, and the operation lever 731 is connected to the flapper 721 via a wire 732. Thus, the flapper 721 can be raised by operating the operation lever 731 in a state where the wheelchair is placed on the platform 716. It is configured to prevent the movement of.
[0006]
[Problems to be solved by the invention]
However, in the above-described conventional lifter 703, the wheelchair is stopped on the platform 716 only by the flapper 721 standing on the rear edge.
[0007]
For this reason, there is no indication of the forward stop position, and there is a hassle of placing it on the platform, raising the flapper, retreating the wheelchair and hitting the rear wheel against the flapper.
[0008]
The present invention has been made in view of such a conventional problem, and an object of the present invention is to provide a lifter capable of stopping a wheelchair on a platform at an appropriate position at a time.
[0009]
[Means for Solving the Problems]
In the re Futa of the present invention in order to solve the above problems, in the lifter to lift the platform carrying the wheelchair to assist passenger of the vehicle of the wheelchair, first plate and the first plate the platform A developed state in which the first plate and the second plate are developed in a plane by a link that supports the platform and a motor that drives the link. A state in which the connecting portion of both plates is folded in a mountain and the drive mechanism is configured to drive the folded state in which the plates are folded and overlapped, and the wheelchair is disposed at a predetermined position for stopping the wheelchair when moving up and down in the recess for positioning the rear wheel in a rear portion of the second plate rear wheels of the wheelchair is located provided within the recess An operation for providing a pressure-sensitive sensor for detecting a load from the rear wheel, and shutting off the supply of power to the motor when the pressure-sensitive sensor senses the load to maintain the drive mechanism in an inoperative state. Stop means were provided.
[0010]
That is, when boarding a vehicle with a wheelchair, the wheelchair is placed on the lowered platform. Then, on this platform, the wheelchair is moved to an appropriate predetermined position. At this time, when the wheelchair is positioned at the predetermined position, the rear wheel of the wheelchair is positioned in the recess formed in the platform.
[0011]
Thereby, a wheelchair is positioned in the appropriate predetermined position which should be made still at the time of a vertical movement. Further, since a part of the rear wheel falls into the concave portion, the wheel is prevented from being removed and inadvertent movement is prevented.
[0013]
In addition , the lifter includes a drive mechanism that folds a planar platform in the middle, and the platform can be downsized by folding the platform when not in use.
[0014]
A pressure-sensitive sensor that senses a load from the rear wheel is provided in the recess in which the rear wheel of the wheelchair is disposed. When the pressure-sensitive sensor senses the load, the drive mechanism operates. Stopped. This reliably prevents malfunctions such as folding the platform with the wheelchair placed.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a view showing a lifter 1 according to the present embodiment, which is supported by a pair of arms extending from a rear chamber of a one-box car as in the conventional case, but the structure thereof will be omitted.
[0016]
That is, the lifter 1 includes a pair of left and right tower rails 11 and 11. Both the tower rails 11 and 11 are supported by respective arms (not shown) extending from the rear chamber, and the tower rails 11 and 11 themselves are configured to move up and down by a built-in lifting mechanism.
[0017]
Link brackets 21, 21 are rotatably provided on the outer surfaces of the lower ends of the tower rails 11, 11. The link brackets 21, 21 are configured to be rotated by a motor (not shown). ing. Extending portions 22, 22 extending toward the vehicle rear R side are formed on the upper portions of the link brackets 21, 21. The extending portions 22, 22 have plate-like first links 23, 23. Is pivotally supported by the first link pivot shafts 24 and 24.
[0018]
In addition, plate-like second links 31, 31 are rotatably supported by second link rotation shafts 32, 32 at base end portions of the link brackets 21, 21 on the vehicle front F side. The platform 33 on which the wheelchair is placed is supported by the first links 23 and 23 and the second links 31 and 31, and the platform rail 33 is moved up and down to raise and lower the platform 33. The platform 33 is configured to support getting in and out of the rear chamber of the wheelchair.
[0019]
The platform 33 includes a first plate 41 that forms the tower rails 11 and 11 side, and a second plate 42 that is in close contact with the rear edge of the first plate 41 and is rotatably supported. Side walls 43, 43, 44, 44 are formed upright on both side edges of the plates 41, 42. The front ends of the first links 31 and 31 are fixed in contact with the side wall portions 43 and 43 of the first plate 41, and the side walls 44 and 44 of the second plate 42 are fixed to the side walls 44 and 44, respectively. The front ends of the two links 23 and 23 are rotatably supported by the front end rotating shafts 45 and 45.
[0020]
As a result, the link brackets 21 and 21 driven by the motor, and the first links 23 and 23 and the second links 31 and 31 supported by the link brackets 21 and 21, as shown in FIG. From the unfolded state 51 in which the first plate 41 and the second plate 42 of the platform 33 are unfolded in a planar shape, the both plates 41, A drive mechanism 54 is configured to drive the folded state 53 in which the 42 is folded and overlapped. In this state, by turning the motor in reverse and rotating the link brackets 21 and 21 in reverse, the plates 41 and 42 in the folded state 53, which are folded and overlapped, are mountain-folded at the connection portions. Via the folded state 52, it can be driven to the unfolded state 51 unfolded in a plane.
[0021]
On the other hand, a flapper 61 is rotatably provided at the rear edge of the second plate 42 constituting the platform 33 as shown in FIG. The flapper 61 is divided into three parts, and the side flappers 63 and 63 provided on both sides of the central flapper 62 are connected by a connecting bar (not shown) on the lower surface, and are configured to interlock. . An operation lever 65 is provided on the side wall portion 64 of one side flapper 63, and by operating this operation lever 65, the both side flapper 63, 63 stands upright with respect to the platform 33. And a tilted state tilted so as to be in contact with or close to the road surface, and can be releasably fixed in both of these states.
[0022]
A recess 71 extending along the rear edge is formed in the rear portion of the second plate 42 over the entire area between the side wall portions 44 and 44. This recess 71 is provided in a portion where the wheelchair is placed at a predetermined position where the wheelchair is stationary when the lifter 1 is operated, and is a circular arc that is sunk downward so that the rear wheel fits. It is formed in a groove shape. The recess 71 is configured so that the rear wheel of the wheelchair can be positioned at the rear of the platform 33.
[0023]
A pressure-sensitive sensor 81 that senses a load from the rear wheel extends over the entire length of the recess 71 on the bottom surface of the recess 71. The pressure-sensitive sensor 81 is configured to operate by detecting the load, and is connected to a power supply circuit to a motor that drives the link bracket 21. Thus, the operation of the drive mechanisms 54 and 54 can be stopped by cutting off the supply of power to the motor while the pressure sensor 81 senses the load. The operation stop means is configured.
[0024]
As an example, a switch-type pressure sensor 81 that is turned off when the load is sensed is used, and the pressure sensor 81 is provided between a power source and the motor. Accordingly, it is possible to configure an operation stop means for stopping the operation of the drive mechanisms 54 and 54 by interrupting the supply of power to the motor when sensing the load.
[0025]
In this Embodiment concerning the above structure, when boarding a vehicle, with a wheelchair mounted, a wheelchair is boarded on the platform 33 of the deployment state 51 which descend | falls. Then, on the platform 33, the wheelchair is moved back and forth to move to a predetermined predetermined position. At this time, when the wheelchair is positioned at the predetermined position, the rear wheel of the wheelchair falls into the recess 71 formed in the platform 33. In this state, the wheelchair can be positioned at an appropriate predetermined position to be stationary when the lifter 1 is operated.
[0026]
Thus, by confirming the drop of the rear wheel in the recess 71, it is possible to confirm that the wheelchair has stopped at an appropriate predetermined position. Therefore, when the lifter 1 is operated, the position of the wheelchair with respect to the platform 33 can be held at an appropriate position.
[0027]
At this time, a part of the rear wheel is dropped into the recess 71. For this reason, wheel removal can be prevented and inadvertent movement can be prevented.
[0028]
Therefore, compared with the conventional case where the wheelchair movement is restricted only by the flapper 61 erected on the rear edge of the platform 33, it is possible to reliably prevent the wheelchair from moving forward due to vibrations when the lifter 1 is operated. Can do.
[0029]
In addition, the lifter 1 includes drive mechanisms 54 and 54 that fold the planar platform 33 in the middle, and the platform 33 can be reduced in size by being folded when not in use. Thereby, space saving of the storage place of the platform 33 can be achieved.
[0030]
A pressure-sensitive sensor 81 for sensing the load from the rear wheel is provided over the entire bottom surface of the recess 71 where the rear wheel of the wheelchair is disposed. The pressure-sensitive sensor 81 senses the load. In this state, the operation by the drive mechanisms 54 and 54 can be stopped. Thereby, in the state where the wheelchair is arranged on the platform 33, it is possible to reliably prevent malfunction such as folding the platform 33, and compared with the case of separately providing a large-scale device for preventing malfunction, Cost reduction can be achieved.
[0031]
【The invention's effect】
In the re Futa of the present invention as described above, in a state of arranging the wheelchair in position, the recess for positioning the rear wheels of the wheelchair is formed in the platform. For this reason, it is possible to confirm that the wheelchair has stopped at an appropriate predetermined position by confirming the drop of the rear wheel into the recess. Therefore, the wheelchair can be held at an appropriate position with respect to the platform when the lifter is operated.
[0032]
At this time, a part of the rear wheel is dropped into the recess. For this reason, wheel removal can be prevented and inadvertent movement can be prevented.
[0033]
Therefore, the wheelchair can be prevented from moving forward due to the vibration during the lifter operation as compared with the conventional case where the movement of the wheelchair is restricted only by the flapper standing on the rear edge of the platform.
[0034]
Further, the lifter over this includes a drive mechanism for folding a flat platform in the middle portion. For this reason, it is possible to reduce the size of the platform by folding it when not in use , and to save the space for storing the platform.
[0035]
A pressure-sensitive sensor that senses a load from the rear wheel is provided in the recess in which the rear wheel of the wheelchair is disposed. When the pressure-sensitive sensor senses the load, the operation by the drive mechanism is performed. Can be stopped. As a result, it is possible to reliably prevent a malfunction such as folding the platform in a state where the wheelchair is arranged on the platform, and the cost is lower than a case where a large-scale device for preventing the malfunction is separately provided. Can be achieved.
[Brief description of the drawings]
FIG. 1 is a perspective transparent view of essential parts showing an embodiment of the present invention.
FIG. 2 is an explanatory diagram showing a state in which the platform according to the embodiment is folded;
FIG. 3 is an enlarged view of a main part showing the platform of the embodiment.
FIG. 4 is a perspective view showing a conventional lifter.
[Explanation of symbols]
1 Lifter
23 First link
31 Second link 33 Platform
41 1st plate
42 Second plate 51 Unfolded state 53 Folded state 54 Drive mechanism 71 Recessed portion 81 Pressure sensor

Claims (1)

In a lifter that lifts and lowers a platform on which a wheelchair is placed to support getting in and out of the vehicle,
The platform comprises a first plate and a second plate having a leading edge connected to a trailing edge of the first plate;
From the unfolded state in which the first plate and the second plate are developed in a planar shape by a link that supports the platform and a motor that drives the link, the connecting portion of both plates is folded in a mountain and the plates are folded and stacked. While configuring the drive mechanism to drive to the combined folded state,
A recess for positioning the rear wheel is provided at a rear portion of the second plate on which the rear wheel of the wheelchair is located in a state where the wheelchair is disposed at a predetermined position for stopping the wheelchair when the platform moves up and down . While providing a pressure-sensitive sensor for sensing the load from the rear wheel,
A lifter characterized in that when the pressure sensor senses the load, an operation stop means is provided for interrupting the supply of power to the motor and maintaining the drive mechanism in an operation stop state .

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