JPH06191412A - Safety against overturning of stair elevator - Google Patents

Abstract

PURPOSE:To use a stair elevator to move up and down along the slope of the stairs so as to carry a weight, and to use a falling preventive mechanism to prevent the falling of the system owing to the movement of the gravity even though the system is inclined according to the inclination of the stairs on the way of the stairs. CONSTITUTION:A driven vehicle 17 is combined to the rear side of a vehicle body 11 which can move by winding and rotating a crawler 12, a crawler is wound to the driven vehicle 17, and the vehicle body 11 and the driven vehicle 17 are combined flexibly so as to fluctuate each other in the normal condition. And when a falling is necessary to prevent, the vehicle body 11 and the driven vehicle 17 are fixed to be made unitary through a fixing/releasing means 20, so as to regulate the rotation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stair lift capable of moving a stair up and down along its inclination, and more particularly to a stair lift capable of preventing a fall when the elevator is inclined in the middle of the stairs. Of the fall prevention mechanism.

[0002]

2. Description of the Related Art It is difficult to mechanize the transportation of luggage and materials in a place with long stairs, such as a building without an elevator or an underpass provided in a station yard to a platform. This is because a transportation machine such as an automobile cannot climb under running conditions such as stairs in which steps are continuous at regular intervals and the steps are inclined. Even in places with such conditions, there was often work that required moving luggage and heavy objects. For example, there is a case where an OA device such as a computer or a copy machine is moved along the stairs, or a newspaper or a soft drink is transported to a shop in a station. In such a case, the worker had to carry the luggage by carrying it or lifting it by hand, but when the physical burden on the worker is large and a large number of personnel are needed, the labor is required. The cost was high and the work efficiency was poor.

In order to solve such a situation, in order to reduce the burden on the worker, a stair lift has been developed which moves the stairs up and down along the inclination of the stairs to move the loaded heavy objects. In this stair lift, various types of running mechanism have been developed for climbing up the sloping stairs.For example, flexible tires are supported on the left and right sides of the car body, the underside of the car body. There was something like an endless crawler wound around. And, there is a structure of the body of these stair lifts that carries a luggage on a loading platform on the upper surface of the car body and moves, but with a special one, a flat plate that can freely swing with respect to the car body is connected. Every other time, even if the car body is tilted according to the inclination angle of the stairs, the flat plate is lifted by the tilted angle with respect to the car body, and the flat plate is always kept horizontal.

In a stair lift having such a structure for keeping the flat plate horizontal, there is no problem because the luggage can be placed on the flat plate and moved while the vehicle body is moving on a flat floor surface by the crawlers and tires. . However, when the stair lift with this configuration moves up and down the stairs, the flat plate is tilted with respect to the vehicle body to correct the angle, and thus the flat plate on which the luggage is loaded is lifted to a high position. Then, the position of the center of gravity of the flat plate on which the luggage is loaded rises and becomes unstable, and the posture is such that the flat plate easily falls. In particular, a stair lift equipped with a lift device mounted on a flat plate having such a structure and having a mechanism for vertically moving personnel and materials by this lift device has a higher risk of falling. This mechanism has the feature that you can climb up to the middle of the stairs by the stair lift and raise the lift device at that position to perform repairs, inspections, painting, etc. on the walls and ceiling of the stairs. It is convenient because you can work without it. However, under such usage conditions, since the flat plate is lifted and the lift of the lift device is raised, the center of gravity is at a higher position, which makes it easier to fall, and the lift is mounted on the lift. It made the workers feel uneasy.

[0005]

As described above, the mechanization of the transportation of the luggage on the stairs is delayed, and the transportation of the luggage on the stairs is usually performed manually. In addition, various work near the stairs, such as maintenance of walls and ceilings,
There is a lot of cleaning, painting work, or inspection of lighting equipment, and labor saving and quickness of work can be improved if work can be performed at high places near the stairs using a lifting device without assembling scaffolding on the stairs. Is. For this reason, it is conceivable that a lift mechanism is mounted on a stair lift that allows the flat plate to oscillate and maintain its level as described above. However, if the flat plate is kept horizontal while the body of the stair lift is tilted according to the inclination of the stairs, the position of the center of gravity becomes high, the stability deteriorates, and the worker feels uneasy. In addition, if the lift mechanism falls down on an inclined staircase, the fall angle becomes more severe than a fall on a horizontal floor surface, which causes a personal injury to a worker.

[0006] For this reason, the stair lift can be used to move up and down the inclined stairs, and even if a lift mechanism having a high center of gravity is used, the vehicle body can be held stably, and the direction of the lower side of the stairs can be reduced. It was desired to develop a stair lift that would not fall.

[0007]

SUMMARY OF THE INVENTION According to the present invention, a vehicle body having a lower surface around which a crawler can be wound and movable, and a front portion of the vehicle body capable of swinging in the vertical direction even if the vehicle body is inclined by stairs. A swinging body that can keep its upper surface horizontal, a driven vehicle swingably connected to the rear part of the vehicle body, a crawler that is wound around the lower portion of the driven vehicle and that can contact stairs, and swinging of the vehicle body and the driven vehicle (EN) Provided is a fall prevention mechanism for a stair lift, which comprises a fixing / releasing means that can be selectively regulated.

[0008]

In the present invention, the driven vehicle is connected to the rear portion of the vehicle body of the stair lift, and the crawler is wound around the driven vehicle. Since the vehicle body and the driven vehicle are connected so that they can swing during normal movement, the vehicle body and the driven vehicle can swing about the connecting portion in accordance with the shape of the step or the inclination of the stairs. . Further, when working, the vehicle body and the driven vehicle can be firmly connected so as to be integrated, so that the length of the lower surface where the vehicle body contacts the stairs becomes long, and the stability can be improved. . In this way, the fulcrum in the lower part of the vehicle body extends below the stairs, and even if the center of gravity rises due to the oscillating body or the lift mechanism mounted on the upper part of the main body, the end portion of the driven vehicle extending below the vehicle body is extended. Since it becomes a fulcrum, the stair lift can be supported to prevent it from falling. Therefore, even if a worker mounts the lift mechanism provided on the upper part of the stair lift, the worker can be prevented from falling and a personal accident can be prevented.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In this embodiment, the stair lift is provided with a crawler on the lower surface of the vehicle body, the crawler can climb the stairs, the swing body can be swung up and down on the body of the stair elevator, and the lift mechanism is provided on the upper surface of the swing body. The mechanism on which is mounted will be described. With this configuration, the rocking body is rotatably connected to one end of the vehicle body, is tilted so as to correct the tilt angle of the vehicle body, and the rocking body can always be kept horizontal, and the lift device is It can move vertically in the vertical direction. In this embodiment, a stair lift equipped with a lift mechanism capable of vertically moving an elevator will be described. First, FIG. 1 is a perspective view showing an entire stair lift according to an embodiment of the present invention, FIG. 2 is a side view showing the stair lift moving up and down the stairs, and FIG. 3 is a rear view of the stair lift. FIG. 4 is a hydraulic circuit showing a control means for fixing or releasing the driven vehicle in the present embodiment.

In the figure, a vehicle body 11 accommodating a motor and a hydraulic mechanism has a flat shape as a whole, and crawlers 12 are wound around both sides thereof. The vehicle body 11 can be self-propelled by the left and right crawlers 12, and the front side of the upper portion of the vehicle body 11 (right side in FIG. 1).
A flat plate-like rocking body 13 connected so as to be rockable in the vertical direction by a pin is mounted on the. An extensible boom body 14 is mounted on the upper surface of the oscillating body 13 and is assembled in an X shape, and the entire length of the oscillating boom body 14 is extended and contracted by the action of an internal hydraulic cylinder (not shown). An elevating table 15 for mounting personnel and materials is connected to the upper part of the telescopic boom body 14. This rocking body 13, telescopic boom body 1
4. The elevating table 15 constitutes an elevating mechanism which is slightly X-shaped when viewed from the side. A mechanism for generating hydraulic pressure for performing various operations is housed inside the vehicle body 11, and the vehicle body 11 and the oscillating body 13 are housed.
Between them is a hydraulic cylinder 21 for holding the oscillating body 13 horizontally with respect to the vehicle body 11 inclined by stairs or steps.
Are interposed (see FIG. 2).

A pair of shaft supporting plates 16 are projected at a rear portion (left side in FIG. 1) of the vehicle body 11, and a space between the shaft supporting plates 16 is raised at one end of a driven wheel 17. The tip of the connecting portion 18 extending in a dogleg shape is inserted, and the shaft support plate 16 and the connecting portion 18 are connected so as to be swingable by a shaft. 1
Crawler 19 is wound around one side of 7, and fixing / releasing means for fixing the shaft support plate 16 to the connecting portion 18 and rotating the shaft to vertically swing the driven wheel 17 as a whole. The hydraulic motor 20 is fixed.

Next, FIG. 4 shows a hydraulic circuit in this embodiment. The hydraulic pump 25 driven by the built-in drive motor 26 has its suction side on the oil tank 2
7, the pressure passage 34 on the discharge side is connected to hydraulic equipment provided in each part of the stair lift. A return path 35 for collecting pressure oil is communicated with the oil tank 27. A switching valve 28 capable of switching in three stages is connected to the pressure passage 34 and the return passage 35, and both ends of the hydraulic motor 19 are connected to the switching valve 28.
A control valve 29 for controlling the opening and closing of the oil passage is interposed at both ends of the hydraulic motor 29. Then, the switching valve 28,
The output of the control circuit 37 is connected to each electromagnetic coil of the control valve 29, and the control circuit 37 has a push button 38 for operating the up / down movement of the driven vehicle 17 and swing of the driven vehicle 17 with respect to the vehicle body 11. There is provided a push button 39 for regulating the.

Next, the operation of the present invention will be described.

In the stair lift according to the present embodiment, the drive motor 26 housed inside the vehicle body 11 is actuated, and the hydraulic pump 25 is driven by the drive motor 26 so that the pressure oil stored in the oil tank 27 is removed. Suction and supply to the pressure path 34. In the pressure path 34, the inflowing pressure oil is distributed to various hydraulic devices inside the vehicle body 11, and these hydraulic devices are operated, whereby the function of the stair lift can be exerted. And this pressure path 34
The crawler 12 is rotated by driving the hydraulic motor (not shown) from the pressure oil from the vehicle, so that the vehicle body 11 travels on the road surface or the floor surface. When the vehicle body 11 travels, the driven vehicle 17 connected to the rear portion moves together with the vehicle body 11 so that the floor surface is dragged, and the crawler 19 of the driven vehicle 17 is rotated by the floor surface. This car body 11
At the time of the movement of the control circuit 37, the push button 39 of the control circuit 37 is instructed to "run" and the control valve 29 is in the conductive state, so that the hydraulic motor 20 is freely rotated and the hydraulic motor The connecting portion 18 can freely swing about the shaft 20 about the shaft 20. Therefore, even if there is a step or unevenness on the road surface or floor surface, the vehicle body 11 and the driven vehicle 17 can be deformed so as to undulate according to the shape of the road surface or floor surface and follow the shape of the road surface or floor surface. it can.

FIG. 2 shows a state where the stair A is being moved using the stair lift. During this movement operation, the crawlers 12 attached to the lower surface of the vehicle body 11 come into contact with the corners of the stairs A, and as the crawlers 12 rotate, the entire vehicle body 11 moves up and down along the inclination direction of the stairs A. Will be done. During this movement operation, the control valve 29 is open, so that the hydraulic motor 20 can freely rotate, and the driven wheel 17 can be swung by the shaft support plate 16 and the connecting portion 18. it can. Therefore, when the vehicle body 11 moves up and down the stairs A,
The vehicle body 11 and the driven vehicle 17 swing relative to each other by absorbing the deformation of the stair A due to the step or the discontinuity caused by the deformation (the stair is not constructed linearly and may be wavy). It will be different. When the staircase traveling machine travels on the stairs A, the rocking body 13 can be maintained horizontally by adjusting the extension amount of the hydraulic cylinder 21. The horizontal angle of the rocking body 13 is corrected by the hydraulic cylinder 21.
By controlling the extension amount of the rocking body 1, the rocking body 1 is tilted by an angle at which the vehicle body 11 tilts downward from the horizontal axis due to the tilt angle of the stairs A.
By rotating 3 the rocking body 13 can be kept horizontal.

When the state shown in FIG. 2 is reached, the rotation of the crawler 12 is stopped to stop the vehicle body 11 at that position, and the telescopic boom body 14 is extended to elevate the platform 15 on which the workers and materials are mounted. Can be lifted upwards. And if the lift 15 is raised to a higher position,
You can paint, repair, and inspect the walls and ceiling of stairs. At this time, since the telescopic boom body 14 extends and the position of the center of gravity becomes high, the vehicle body 11 easily falls, and therefore the vehicle body 11 must be held on the stairs A so as not to fall. Therefore, the telescopic boom body 1
Before the valve 4 extends, the push button 39 of the control circuit 37 is operated to close the control valve 29 to stop the flow of the pressure oil at both ends of the hydraulic motor 20. Then, the shaft of the hydraulic motor 20 cannot rotate and is stopped at that angular position, the shaft support plate 16 and the connecting portion 18 are held at that angle, and the driven vehicle 17 is It is fixed integrally at the rear of 11. Therefore, the vehicle body 11 and the driven vehicle 17 are maintained in a straight line, and the length of the lower surface of the vehicle body 11 on which the rocking body 13 is held is determined by the driven vehicle 1
7 is extended to the lower end, and the lower end of the driven vehicle 17 becomes a fulcrum when the entire stair climber falls. However, since the fulcrum of this fall extends to the lower end of the driven vehicle 17 which is extended further downward from the lower end of the vehicle body 11, the length of the lower surface apparently supported by the vehicle body 11 becomes long, and the vehicle body 11 and the rocking body are extended. 13 does not fall easily. In this manner, the extension of the telescopic boom body 14 raises the lift 15 to a high position, and the stair lift can be prevented from falling even if the position of the center of gravity becomes high.

When the stairs traveling on a horizontal and flat floor B (the state shown in FIG. 5), the driven vehicle 17 having the crawler 19 wound by the vehicle body 11 is placed on the floor B. Will result in a loss during driving and poor operability. Therefore, when traveling on the floor B, the push button 38 of the control circuit 37 is pressed to switch the switching valve 28 to the "normal" side to move the crawler 19 and the floor B.
To release the contact. The pressure oil from the pressure path 34 is transmitted to the hydraulic motor 20 to rotate the hydraulic motor 20 to lift the driven vehicle 17 in a horizontal state where the floor surface B and the crawler 19 are in contact with each other in the direction C in FIG. The vehicle 17 can be started up in the rear part of the vehicle body 11 until it becomes slightly perpendicular to the road surface B. By driving the crawler 12 while keeping the driven vehicle 17 in the state shown by the solid line in FIG. 5, the vehicle body 11 can move on the floor surface B extremely lightly. When it is desired to bring the driven wheel 17 into contact with the road surface B or the stairs A, the push button 38 of the control circuit 37 is operated to switch the switching valve 28 to the "reverse" side to move the hydraulic motor 20 in the reverse direction. Rotate. Then, contrary to the above, the shaft of the hydraulic motor 20 reversely rotates and the connecting portion 18 moves to the position shown in FIG.
The driven wheel 17 is lowered to the floor B or the stairs A by rotating in the opposite direction to C.

Next, FIG. 6 shows another embodiment of the present invention. In this embodiment, a pair of shaft support plates 31 are projected on the rear part of the vehicle body 11, and the shaft support plates 3
1 is a connecting portion 1 extending in a dogleg shape at the rear end of the driven wheel 17.
8 is inserted, and the shaft support plate 31 and the connecting portion 18 are pin 3
3 is rotatably connected. A hydraulic cylinder 32 for swinging the shaft support plate 31 and the driven wheel 17 is interposed between them.

With this structure, when the connection between the vehicle body 11 and the driven vehicle 17 is fixed, the flow passage of the port of the hydraulic cylinder 32 is closed. In the hydraulic cylinder 32 whose ports are closed at both ends, the extension of the cylinder rod is fixed, so that the shaft support plate 31 and the connecting portion 18 are held at the angular position. Therefore, the vehicle body 11 and the driven vehicle 1
7 is fixed in conformity with the state of the floor B or the stairs A, and the vehicle body 11 and the rocking body 13 are integrated so that the vehicle body 11
The oscillating body 13 mounted on is stably held.

When the vehicle body 11 travels on the road surface B, the friction caused by the crawler 19 of the driven vehicle 17 interferes with the travel. Therefore, the hydraulic cylinder 32 is extended to move the connecting portion 18 around the pin 33. Then, the driven wheel 17 is lifted in the direction D in FIG. In such a state, the stair traveling machine can be moved by the driving force of the crawler 12, and therefore can move extremely smoothly.

[0021]

Since the present invention is configured as described above, the vehicle body is integrally fixed together with the driven vehicle even when the rocker provided on the upper surface of the stair lift is kept flat. The length of contact with the surface of the apparent stairs becomes long, and the rocking body can be stably held. For this reason, even if a lift device for lifting the lift is mounted on the rocking body and the position of the center of gravity is changed by this lift device, the stair lift will not fall due to the movement of the center of gravity, and the lift device will not fall. It is possible to prevent a personal injury from occurring in a worker who is on board.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which a lift mechanism capable of ascending and descending to a high place is mounted on a stair traveling machine, which is an embodiment of the present invention.

FIG. 2 shows an embodiment of the present invention, in which a stair traveling machine is a stair A
It is a side view showing a state where the vehicle is traveling.

FIG. 3 is a perspective view showing a configuration of a driven vehicle connected to a rear portion of the stair traveling machine, which is an embodiment of the present invention.

FIG. 4 is a hydraulic circuit for controlling an angle of a follower vehicle mounted on a stairway traveling machine for preventing a fall, which is an embodiment of the present invention.

FIG. 5 is a side view showing a state in which the staircase traveling machine travels on a flat road surface B, which is an embodiment of the present invention.

FIG. 6 is a side view showing another embodiment of the fall prevention mechanism of the stair traveling machine, which is one embodiment of the present invention. 11 Vehicle Body 12 Crawler 13 Swinging Body 14 Telescopic Boom Body 15 Elevating Stand 16 Shaft Support Plate 17 Driven Vehicle 18 Connecting Part 19 Crawler 20 Hydraulic Motor as Fixing / Release Means 21 Hydraulic Cylinder 29 Switching Valve

Claims (6)

[Claims] 1. A vehicle body on which a crawler can be wound around a lower surface to move, and a rocker which is connected to a front portion of the vehicle body and can rock vertically so that the upper surface of the vehicle body can be kept horizontal even when the vehicle body is inclined by stairs. The moving body, the driven vehicle swingably connected to the rear part of the vehicle body, the crawler that is wound around the lower portion of the driven vehicle and can contact the stairs, and the locking / unlocking that can selectively regulate the swinging of the vehicle body and the driven vehicle And a fall prevention mechanism for a stair lift. 2. The fall prevention mechanism for a stair lift according to claim 1, further comprising a lift mechanism mounted on the upper surface of the rocking body for vertically moving the lift table. 3. The fixing / releasing means is fixed to the vehicle body side,
The fall prevention mechanism for a stair lift according to claim 1 or 2, wherein the rotation motor is a hydraulic motor having a fixed shaft fixed to a driven vehicle. 4. A fall prevention mechanism for a stair lift according to claim 1, wherein a switching valve for opening and closing a flow path is connected in parallel to the pair of ports of the hydraulic motor. 5. The fall prevention mechanism for a stair lift according to claim 1, wherein the fixing / releasing means is a hydraulic cylinder interposed between the vehicle body and the driven vehicle. 6. A fall prevention mechanism for a stair climber according to claim 1, wherein a switching valve for opening and closing a flow path is connected in parallel to the pair of ports of the hydraulic cylinder.