JPH0495538A - Automatic lifting gear - Google Patents

Abstract

PURPOSE:To lift a person on a wheelchair up and down safely by forming a downward step in the bottom of a lift carriage and simultaneously such an upward step as serving as this upward step in a storage state but a platform in an unfolded state, in a rear upper part of the downward step, respectively. CONSTITUTION:When a pedestrian uses it as usually, an upward step 21 and a tip flap 22 are housed into storage, while a downward step 20 is formed on the bottom of a lift carriage 17, constituting a stairway. On the other hand, when a person on a wheelchair uses it, the upward step 21 and the tip flap 22 are unfolded, forming a platform 23. Then, a pair of pivot supporting arm of a lift carriage starting means (unillustrated herein) is operated, a vertical movement of the lift carriage 17 takes place. At this time, the lift carriage 17 is selectively lifted up from a ground level position to an inner part floor level position and vice versa.

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of Industrial Application> The present invention relates to an automatic lift device having a vertically movable lift carriage disposed within a door opening of a vehicle, building, etc.

<Prior Art> As is well known, automatic lift devices are placed inside door openings of vehicles, buildings, etc., and are used to vertically move people in wheelchairs, people on crutches, luggage, etc. Various proposals have been made. As a typical example, [J, S, P, 40
27807.3913497.4026387.398
4014.4007844 and 3918596.

<Problems to be Solved by the Invention> The conventional automatic lift device described above is extremely complex in both its structure and operation, and therefore is difficult to manufacture, assemble, and maintain. Furthermore, since there are many moving parts, their mechanical lifespan is short and the overall cost is high. Furthermore, when operating these systems, additional auxiliary equipment such as safety guards is required to safely raise and lower people in wheelchairs.
Installation and handling were troublesome.

<Object of the Invention> Therefore, an object of the present invention is to solve the problems of the conventional technology as described above, and to provide a device that can be easily assembled into the door opening of a vehicle, building, etc. This is an automatic lift device for door openings having a vertically movable lift carriage, which has a simple structure and operation, and is easy to manufacture, assemble, and maintain, and is therefore low cost. An object of the present invention is to provide an automatic lift device that can be operated safely without the need to separately provide auxiliary safety devices such as a safety guard.

<Means for Solving the Problems> In order to achieve the above object, the present invention has the following technical means. That is, to explain using the reference numerals used in the attached drawings corresponding to the embodiments, a lift carriage 17 which is disposed within an opening 12 of a doorway of a vehicle, a building, etc. and is movable in the vertical direction; In the automatic lift II consisting of a lift carriage starting means 48 for vertically displacing the lift carriage] 7, said lift carriage] 7 has a U-shaped configuration, the bottom of which is adapted to form the lower step 20 part. Additionally, an upper step 21 is formed above the rear portion of the lower stellar bar 2°, which forms an upper step 21 in the retracted state and forms an extension of the platform 23 coplanar with the lower step 20 in the unfolded state. In addition, the upper step 21 is located vertically below the upper step 21 in the stowed state, and forms an extension of the platform 23 coplanar with the upper step 21 in the unfolded state, and is selected upwardly. The lift carriage [7] is selectively raised and lowered from the ground level position C to the internal floor level position B by the lift carriage starting means. This is an automatic lift device that is characterized by: Further, the lift carriage starting means 48 is arranged between a main pivot actuator shaft 51 disposed behind the lift carriage 17 and an axis centered between the main pivot actuator shaft 51 and the lift carriage 17. a pair of fixed pivot support arms 56,57 in coupled relationship with said main pivot actuator shaft 5;
The steering power unit 49 selectively rotates the steering unit 49, and the steering power unit 49 is characterized in that the steering power unit 49 converts linear motion of a piston disposed therein into rotational motion. This is an automatic lift device.

<Function> According to the above configuration, the bottom of the lift carriage I7 forms the lower step 20, and the upper step 21 is formed above the rear part of the lift carriage in a stored state, so that it can normally be used as a staircase, and By unfolding the upper step 21, a platform 23 on the same plane as the lower step 20 can be formed, making it easy to raise and lower a person in a wheelchair or luggage. By moving the tip hula lug 22 upward, it is possible to prevent the wheelchair, etc., from falling off.
A safe automatic lift device can be provided without separately providing an auxiliary safety device. Furthermore, the above-mentioned lift carriage 17
is vertically moved by a pair of pivot support arms 56 and 57 fixed to the main pivot actuator shaft 51, so its structure and operation are simple, manufacturing, assembly and maintenance are easy, and costs are kept low. be able to. The steer link power unit 49 that rotates the main pivot actuator shaft 51 converts the linear motion of the piston disposed therein into rotational motion, so the position when the lift carriage 17 is raised or lowered is An automatic lift device can be provided which can reliably select a lift carriage and is equipped with a compact lift carriage starting means 48, and which can be easily assembled into a door opening 12 of a vehicle, building, etc.

<Example> Hereinafter, an example of the present invention will be described in detail based on the accompanying drawings.

As shown in FIG. 1, the automatic lift device 11 moves the door 16 into the step well retreat section 14 of the door opening 12 of the vehicle I3.
It is assembled in such a way that it does not interfere with the normal operation of the The lift carriage 17, which is the main part of the automatic lift device 11, is moved by rollers 18 that are slidably engaged with vertical track guides 19 assembled along each side of the door opening 12. Assembled so that it can slide. The lift carriage 17 is formed in a U-shape, the bottom of which forms a lower step 20. Furthermore, the lift carriage I7 is provided with a retractable upper step 21 having an axially connected end flap 22. The upper step 21 and tip flap 22 are optionally configured to form an extension of a platform 23 in combination with the lower step 20 of the lift carriage 17 in a coplanar relationship with the lower step 20, as shown in FIG. It is extendable and retractable, and is formed to be movable together with the lift carriage 17. The tip flap 22 is used to raise the lift carriage 17 and prevent the wheelchair received on the platform 23 from falling off.
While being pulled down, it moves upward as shown in FIG. 3 to form a safety guard position.

The operation of the upper step 21 and the tip flap 22 is performed by step activation coupling means as shown in FIGS. 4 and 5. The step activation control cylinder 24 of the step activation coupling means is moored at one end to an anchor block 25 disposed on the top of one of the side walls of the lift carriage 17, and the control cylinder actuator rod 26 at the other end is connected to the lift carriage I7. It is connected to an angle lever 27 which is rotatably supported by a shaft 28 provided on the side wall of the holder. Above angle lever 2
7 is connected to the first connecting link 29 via the shaft 30.

The first connecting link 29 is then connected to the second connecting link 32 via the shaft 31. Furthermore, the second connection link 3
The other end of 2 is connected to a first extension arm 34 via a shaft 33. One end of a third connection link 35 is pivotally supported by a shaft 33 provided at a midway position of the first extension arm 34, and the other end is connected to a midway position of the second extension arm 37 via a shaft 36. Connected. Said first extension arm 34 is connected at one end to the upper step 21 by a shaft 38 and at the other end to a shaft 39 fixedly mounted on the bottom of the lift carriage 7. The shaft 39 is a lift shaft for simultaneously operating the first extension arm 34 and an extension arm 40 paired with the first extension arm 34.
It passes through the bottom of the carriage 17. The extension arm 40 is connected to the upper step 21 in the same way as the first extension arm 34. The second extension arm 37 is connected at one end to the upper step 21 via a shaft 41 and at the other end to a shaft 42 fixedly provided through the bottom of the lift carriage ]7.
The extension arm 4 is formed to be paired with the extension arm 37.
This operation is performed simultaneously with 3. The extension arm 43 is also connected to the upper step 21.

Further, at the distal ends of each of the second extension arm 37 and the extension arm 43, cam shafts 45 and 4 are provided which hold the distal end flap 22 connected to the upper step 21 via a shaft 44.
6 are provided toward the outside. And the above axis 3
8, 39, 41, and 42 are located in a positional relationship that corresponds to each vertex of a parallelogram, and the upper step 21 is configured to operate while remaining horizontal.

A lift-carriage starting means 48 for vertically moving the lift carriage 17 is shown in FIGS. 6 to 8.

The lift carriage starting means 48 consists of a main pivot actuator shaft 51 disposed behind the lift carriage 7, a pair of pivot support arms 56 and 57 fixed thereto, and a steering power unit 49 for driving them. Reference numeral 49 converts the linear motion into rotational motion through interference mesh teeth formed on the output shaft of the bis-ton disposed therein, and outputs the rotational motion from the rotary output shaft 50. Said rotary output shaft 50 is connected to the main pivot actuator shaft 51 via adjustment connection means 52.

Said adjustment connection means 52 comprises an elbow-connection arm 53 fixedly connected to the main pivot actuator shaft 51 and adapted to engage a collar bin extension 54 disposed on the rotary output shaft 50. . and the main pivot actuator shaft 5.
1 is provided parallel to the rear wall 55 of the stepwell setback 14 of the doorway opening 12 in which the lift carriage 17 is assembled, and has a pair of spaced apart pivot support arms 56,57. are doing.

The pair of pivot support arms 56, 57 are
The outer surfaces 58 and 59 of the side walls of the carriage 17 are spaced apart from and extend into the step well recess 14 parallel to the outer surfaces 58 and 59, respectively. And they are connected to one end of the connecting link 60 by a pivot shaft 61. The other end of the connecting link 60 is fixed to the outside of the side wall of the lift carriage 17 by an anchor shaft 62 to support the lift carriage 17. Additionally, a selectively actuated safety stop device 65 is provided to support the lift carriage 17 in the normal step height position B.

The safety stop device 65, as shown in FIG. Each end has a safety slide block 7 for engaging with support blocks 72 and 73 disposed on the pivot support arms 56 and 57.
0°71 is provided. As shown in FIG. 8, the steering power unit 49 is equipped with a manual control shaft 3 and a removable handle 64 so that it can be manually moved in the event of a failure in its hydraulic control system. .

A safety guard activation device 74 for moving the tip flap 22 provided at the tip of the upper step 21 upward when it is deployed is shown in FIGS. 9 and 10. The safety guard activation device 74 is designed to prevent a wheelchair or the like mounted on the lift carriage 17 from falling off.
When lifting and lowering the lift carriage 17 (see Figures 3 and 8), move the tip flap about 3 degrees above the horizontal level.
It is pulled up so as to form a lifting angle of 0 to 35 degrees, and is driven by a hydraulic actuation cylinder 75, and consists of a slidable bushing rod 78 connected to an actuation link 76, 77 that is continuous via a shaft, and a tip flap. It is provided on the back surface of the upper step 21 so as to push out the lift rod 79 provided on the back surface of the upper step 22. The actuating links 76,77 are then provided with springs 80 to keep the slidable bushing rod 78 retracted when the hydraulic actuating cylinder 75 is not pressurizing them.

The slidable bushing rod 78 is connected to the support guide 8.
2.83 and is supported under tension by a spring 81. The supports and guides 82 and 83 are formed so that the slidable bushing rod 78 can escape laterally if the tip flap 22 encounters an obstacle and the lift rod 79 fails in response to the pressure of the hydraulic activation cylinder 75. There is. A ground rest member 84 is provided to prevent the safety guard activation device 74 from contacting the ground.

Further, behind the lift carriage 17, there is a possibility that a person riding on the lift carriage may come into contact with structures such as the lift carriage starting means 48 located behind it, or the rear frontage when the lift carriage is lowered. A safety shield panel 85 is provided to prevent problems such as being pinched. As shown in FIG. 11, the safety shield panel 85 closes the rear opening of the U-shaped lift carriage 17 and is configured vertically. A horizontal flange 86 is provided to engage the bottom. A guide member 87 is provided at the rear of the safety shield panel 85 to keep it vertical, and a channel 88 is provided along the rear wall of the step well retreat section 14. Then, the safety shield panel 85 is attached to the spring 8
9 forms a safety shield panel that can flexibly follow the lifting and lowering movements of the lift carriage 17.

The vertical track guide 19, which serves as a guide when vertically moving the lift carriage 17, has an inwardly inclined side wall 107 in order to hold each groove of the roller 18, as shown in FIG. It has a structure that reduces the thrust force on the roller 18.

Next, an example of its use will be explained.

In normal use, that is, when used by a pedestrian, the upper step 21 and the end flap 22 are retracted as shown in FIGS. 1 and 4, and the lift carriage 17 is in its normal position. is maintained. At this time, the bottom of the lift carriage 17 forms a lower step 20, which together with the upper step 21 forms a staircase shape. Furthermore, at this time, the lift carriage 17 is supported by a safety stop device 65 installed behind it, so that even if a problem occurs in the hydraulic system or electrical system, it will not fall downward, and pedestrians can safely ascend and descend. It is possible.

Next, when used by a person in a wheelchair or on crutches, move upward step 2 as shown in Figure 2.
1 and tip flap 22, and platform 2
Form and use 3. The upper step 21 and the tip flap 22 are connected to the activation cylinder 2 as shown in FIG.
4, pull back the piston rod 26, rotate the angle lever 27 around the shaft 28, and open the first connecting link 29.
and actuating the first and second extension arms 34,37 via the second connecting link 32 and the third connecting link 35.

At this time, the opposite extension arm 40.43 is activated in the same way, and the upper step 21 moves in parallel while keeping it horizontal, and the tip flap 22 provided at the tip thereof is extended in the horizontal direction by the camshaft 45.46. A platform 23 is formed by movement in the direction of the position. after that,
Vertical movement of the lift carriage 17 is effected by operating the pair of pivot support arms 56, 57 of the lift carriage activation means 48 as shown in FIG.

After forming the platform 23 by deploying the upper step 21 and tip flap 22 as described above, the lift carriage 17 is lowered. Prior to this, the solenoid actuator cylinder 66 is activated to release the safety stop device in its normal position (A in the figure).
is activated, and the pair of pivot support arms 56, 57
The safety slide block 70.71 engaged with the support block 72.73 is released, allowing the pair of pivot support arms 56.57 to be freely raised and lowered. At this time, actually the safety slide block 70.7
The lift carriage is lifted slightly in order to release the load on 1 and easily perform the release operation. At this time, the integrity of both the hydraulic system and the electrical system can be checked. Thereafter, the lift carriage 17 is lowered to the ground position (C in the figure). At this time, the safety slide blocks 70, 71 return to their respective normal support interference positions upon completion of the actuation of the solenoid actuator cylinders 66. The safety slide blocks 70, 71 and support blocks 72, 73 each have a corresponding taper, so that they do not interfere in any way when being pulled up. And at the ground position,
A person in a wheelchair or on crutches is placed on platform 23. Then, after that, the tip flap 2
2 upwardly by the safety guard activation device 74 by approximately 30 to 3
The lift carriage 17 is raised by moving it five degrees to prevent the wheelchair or the like from falling off. Then, as shown in FIG. 3, the vehicle stops at a place where the floor 15 and platform 23 are on the same plane (B in the figure), and a person in a wheelchair or the like is accommodated in the vehicle. Then, it is pulled down again to the normal position (A in the figure), the upper step 21 and the tip flap 22 are retracted, and the door is closed, completing the series of operations. When the lift carriage 17 is raised or lowered, its rear opening is blocked by a safety shield panel 85, so there is no risk of your feet touching or getting caught in structures when going up or down. There isn't. Furthermore, if the lift carriage 17 stops mid-movement due to a problem with the hydraulic or electrical system and is then pulled down, the safety stop device will hold it in its normal position, so the falling distance will be short. There is no need to worry about your wheelchair being thrown out.

In this embodiment, the case where the present invention is applied to a vehicle has been described, but the present invention can be similarly applied to a building or the like.

<Effects of the Invention> As detailed above, the present invention provides the following effects. That is, according to claim 1, it is highly versatile for use in door openings of vehicles and buildings, has a simple structure, is easy to manufacture, assemble, and maintain, and is low cost. A safe automatic lift device that does not require additional safety equipment can be provided. According to the second aspect of the present invention, it is possible to provide an automatic lift device having a lift carriage starting means that is compact in lifting and lowering operations of the lift carriage and is accurate in its operation. Furthermore, according to claim 3, the lift carriage can be pulled up and down more safely. According to claim 4, it is possible to easily prevent inconveniences such as contact with the starting device or the like or foot getting caught when the lift/carriage is operated. It is possible to provide an automatic lift device that reliably enables vertical movement of a lift carriage.

[Brief explanation of the drawing]

The accompanying drawings show an embodiment of the present invention, and FIG. 1 is an overall perspective view showing its overall configuration, and FIGS. 2 and 3 are overall perspective views showing its operating state. , when the platform is being formed, and FIG. 3 shows the lift carriage raised to the floor of the vehicle. Figures 4 and 5 are side views showing the operating state of the upper step and its tip; Figure 4 shows it when it is stored, and Figure 5 shows it when it is deployed (forming the platform). . Fig. 6 is a side view showing the lift carriage starting means and vertical movement of the lift carriage; Fig. 7 is a front view showing the safety stop device; Fig. 8 is a front view showing the lift carriage starting means and the lift carriage. ,
9 and 10 are perspective views showing the safety guard device provided on the back surface of the upper step, with FIG. 9 showing the device when it is not in operation, and FIG. 1O showing it when it is in operation. and the 11th
The figure shows a schematic illustration of the safety shield panel, and FIG. 12 shows a cross-sectional view of the vertical track guide. In addition, the symbols in the figure are: II... automatic lift device, 12... door opening. 13... Vehicle. 4... Stepwell retreat part. 5...floor, 16...door. 7...Lift carriage. 8...Roller 9...Vertical track guide. 0...Downward step, 2 2...Tip flap. 3...Platform. 8...Lift carriage starting means. 9...Steering power unit. l...Main pivot actuator shaft 6.57...
- Pivot support arm. 5... Safety stop device. 5...Safety shield panel. 9...Spring. 1...Upward step

Claims (5)

[Claims] (1) Consisting of a lift carriage 17 that is disposed within the door opening 12 of a vehicle, building, etc. and is movable in the vertical direction, and a lift carriage starting means 48 that moves the lift carriage 17 in the vertical direction. In the automatic lift device, the lift carriage 17 has a U-shaped bottom whose bottom part is adapted to form the lower step 20 part, and a recessed upper part of the rear part of the lower step 20 part. An upper step 21 is formed which forms an upper step 21 in the state and forms an extension of the platform 23 on the same plane as the lower step 20 in the unfolded state. A distal flap 22 is formed, which is located vertically below 21 and forms an extension of a platform 23 coplanar with the upper step 21 in the unfolded state, and which is selectively movable upward. Then, the lift carriage 17 is moved to the ground level position C by the lift carriage starting means 48.
An automatic lift device characterized in that it is selectively raised and lowered from an internal floor level position B. (2) The lift carriage starting means 48 is a lift carriage starting means 48.
a main pivot actuator shaft 51 disposed behind the carriage 17 and a pair of fixed pivot support arms 56, 57 in axial connection between the main pivot actuator shaft 51 and the lift carriage 17; and a steering power unit 49 that selectively rotates the main pivot actuator shaft 51, and the steering power unit 49 is characterized in that the steering power unit 49 converts linear motion of a piston disposed therein into rotational motion. An automatic lift device according to claim 1. (3) The pivot support arm 56 is configured to support the lift carriage 17 in its intermediate normal use position.
, 57 and a safety stop device 65 having selective engagement with
3. The automatic lift device according to claim 1, wherein a lift device is provided at the opening 12 of the doorway. (4) There is a lift at the rear of the lift carriage 17.
A safety shield panel 85 engages with the bottom of the lift carriage 17 and is biased by a spring 89 to prevent contact with starting structures located at the rear of the carriage 17 and rear opening when the lift carriage 17 is lowered. 2. The automatic lift device according to claim 1, further comprising: an automatic lift device. (5) The lift carriage 17 is located at the door opening 1.
vertical track guides 19 with internally sloping side walls assembled along each side of the lift carriage 17 and corresponding grooves for vertical movement guided by spaced apart rollers on the lift carriage 17; The automatic lift device according to claim 1, characterized in that the automatic lift device performs an operation.