KR20220061325A - The overload detection system by the offset of the stairs with wheelchair lift and method of operating - Google Patents

Abstract

The present invention relates to a system for sensing an overload due to an offset of a stair-wheelchair lift and, more specifically, to a system for sensing an overload due to an offset of a stair-wheelchair lift, capable of suspending the operation and issuing an emergency alarm when an offset which is no less than a preset value occurs on one of a plurality of load cells, and an operation method thereof. Therefore, the system can be guided to safe operation in case of an overload detected when a rated load is exceeded by 75 kg, can be guided to a wheelchair user through visual and acoustic signals to have an advantage of promptly warning the user, and can fundamentally prevent an offset to protect a driving motor and prevent a twist or the like of components connected in general, which can lead to a reduction in maintenance costs.

Description

The overload detection system by the offset of the stairs with wheelchair lift and method of operating

The present invention relates to an overload detection system and an operating method thereof for a wheelchair lift combined with stairs, and more particularly, when an unbalanced load is generated in one of a plurality of load cells more than a set value, an emergency stop and an emergency alarm are generated. It relates to an overload detection system by the unbalanced load of a stair-combined wheelchair lift that can prevent the occurrence of safety accidents in advance and an operation method thereof.

As is well known, stairs are constructed at a place where an entrance to the inside of a building is formed. Also called a stair, it connects two floors of different heights or puts a certain height difference from the ground in preparation for flooding. It is a short-shaped passageway constructed between the building under construction and the ground.

These stairs are mainly used by the general public, but the elderly, the handicapped in wheelchairs, or strollers cannot use it, so it is legally compulsory to construct a ramp to solve this problem. In this case, the length of the ramp was made to be 12m or more. Considering the crossing and horizontal sections, the total length of the ramp should be constructed at 15m, so the construction cost is high, and it takes up a lot of space, so it is not effective.

Therefore, these ramps are easy to install in apartments or shopping malls with a large space around the stairs, but if you are reluctant to install a stage, commercial facility, religious facility, etc. occurred frequently.

In order to solve the problem of such a ramp construction, the wheelchair lift of Patent Registration No. 10-0638176 registered by the applicant of the present invention as an earlier application has been proposed.

The wheelchair lift has a rail installed on one side of the previously constructed staircase, and is composed of a body that moves along the rail and a platform that is installed to be foldable on the body. In a state in which the safety device operates to protect the wheelchair, the body is driven to transport the wheelchair to the top or bottom of the stairs.

However, since it is essential to secure space in accordance with the operation of such a wheelchair lift, the utilization of the space decreased as well as the economic loss increased. There were many problems such as very inconvenient to use due to the long waiting and transport time due to operation, high installation cost and frequent breakdowns, which added to the cost of maintenance as a heavy burden on the operator.

On the other hand, as shown in Fig. 1, in the conventional invention, the vertical lift device for use with stairs of Patent Registration No. 10-1090782 is stretched in length by an external power source, respectively, to lift / lower a wheelchair or a stroller on which the elderly or the disabled are boarding. a plurality of driving units 100 installed vertically on the corners of the upper/lower platforms (G1) and (G2), respectively; A plurality of guides connected to and installed with each of the driving units 100 installed on the upper platform G1 side among the plurality of driving units 100 so that the driving unit 100 can be safely and smoothly raised/lowered. part 200; Normally, the upper surface is changed to a flat platform form by the driving of the driving unit 100 from the stair form available to the general public, and when a vehicle is boarded on the upper part, it rises / lowers, moves the vehicle safely, and then returns to the original step form again. a variable lifting unit 300 that becomes; and a control unit 400 that drives the driving unit 100 by operating a switch to convert the variable lifting unit 300 from a staircase to a platform.

The driving unit 100 has a coupling hole 112 formed at an upper portion, respectively, and a body 110 having a space formed therein, and is vertically inserted and fixed in the space of the body 110 to have two or three steps in length. It consists of an electric cylinder 120 that expands and contracts, and upper/lower fixing steps 130 and 140 in which the lower end of the body 110 is inserted and coupled therethrough.

A driving motor (M2) driven by a power source, respectively, and a driving motor (M2) driven by power to a predetermined radius by driving the driving unit (100) body (110) installed on the lower platform (G2) side of the driving unit (100) The fall arresters 160 that rotate to prevent the vehicle from falling are installed to correspond to each other.

The guide unit 200 includes a connecting plate 210 integrally coupled to one surface of the body 110 of the driving unit 100 , and the other side of the connecting plate 210 , and a plurality of rollers 222 on the side surface. ) is formed of a guide rod 220 rotatably installed, and a support rod 230 having a guide groove 232 formed on one surface so that the guide rod 220 can be inserted therein to ascend / descend.

The variable lifting unit 300 has a connecting rod 310 having a plurality of coupling holes 112 formed on the upper portion of the body 110 of the driving unit 100 and a plurality of hinge holes 314 coupled to the hinge 312 at regular intervals on the bottom surface. ), a pair of handrails 320 fixed and installed at the bottom, and a coupling hole 332 is formed in the upper portion so that the hinge 312 can be coupled to the hinge hole 314 formed in the connecting rod 310, the pair of A plurality of supports 330 rotatably installed on the lower part of the handrail 320 of the Both ends of the plate 340, the plurality of step plates 340 and the upper/lower fixing steps 130 and 140 of the driving unit 100 are hinged to be rotatable at regular intervals, respectively, and the lower platform G2 ) at the end of the side, the wheel 352 is formed of a side frame 350 integrally mounted to be rotatable.

On any one of the supports 330 of the variable lifting unit 300, a stop switch 362 and a joystick 364 are installed on one of the supports 330 to be used in an emergency. to operate the lifting/lowering of the variable lifting unit 300 by manipulating the .

Safety pillars 500 are installed on both sides of the upper platform G1, respectively, and a cylinder 510 is installed inside the safety pillar 500, and the other end of the link 512 operated by the cylinder 510 is The rotating plate 514 is rotatably installed, and safety rods 516 having a certain length that are welded and fixed at one end to the rotating plate 514 are installed correspondingly to prevent the fall of the waiting vehicle at the upper platform G1. can be prevented

A light emitting sensor SN1 is installed on the body 110 of the driving unit 100 on the upper platform G1 side of the driving unit 100, and a light receiving sensor on the body 110 of the driving unit 100 on the lower platform G2 side. SN2) is installed to always detect that the horizontal state is maintained when the variable lifting unit 300 is raised/lowered, and the control unit controls the operation of the driving unit 100 when the variable lifting unit 300 is inclined to one side. 400, and a detection sensor SN3 is installed on the body 110 of the driving unit 100, respectively, to prevent collision with a waiting vehicle at the upper/lower platforms G1 and G2. to avoid accidents caused by

However, in this conventional wheelchair lift with stairs, if the driving part is driven in a state in which excess weight or an unbalanced load occurs when boarding a wheelchair on the upper or lower platform, the center of gravity is biased to one side, and a dangerous situation such as a wheelchair falling may occur. Not only that, but also there was a problem that the driving part was damaged, which increased the cost for maintenance, and thus economic feasibility and safety were greatly reduced.

Registered Patent Publication No. 10-1090782 Registered Patent Publication No. 10-1974639 Registered Patent Publication No. 10-2153477 Unexamined Patent Publication No. 10-2020-0101698

The present invention has been made to solve the above problems, and when an excessive weight or an unbalanced load occurs when boarding a wheelchair on the upper or lower platform, it is detected in advance by the load cell to prevent operation and at the same time an alarm is sounded so that the occupant or guardian can do this. An overload detection system and its operation method for stair-use wheelchair lift that can simultaneously improve safety and economy by preventing the occurrence of safety accidents and preventing breakdown and damage of the drive unit by recognizing and changing the boarding position. It is intended to provide

In order to solve the above problems, the present invention provides a driving unit capable of elevating/lowering a wheelchair or a stroller on which the elderly or the disabled are boarding, each of which is stretched in length by an external power source; a plurality of guide parts for supporting the driving part so that the rising/lowering of the driving part can be performed safely and smoothly; By the driving of the driving unit, the upper surface is changed from a staircase shape usable to ordinary people to a flat platform shape, and when a vehicle is boarded on the upper part, the vehicle is lifted/lowered to safely move the vehicle and then return to its original form in the shape of a step. wealth; a plurality of load cells respectively installed on the upper side of the plurality of driving units, receiving pressure from the load of a wheelchair or a stroller on which the elderly or the handicapped are riding, calculates load information and transmits it to the control unit; A control unit that drives the driving unit by operating a switch to convert the variable lifting unit from a stairway to a platform shape; including, wherein the control unit is installed in a stair form and is installed in the form of a stair to the plurality of load cells in the standby stage for operation Displays the initial load applied to each, and displays the total load applied to the plurality of load cells when the control unit is operated when the vehicle arrives at the lower platform. maintains a horizontal state and generates a buzzer alarm when an unbalanced load is generated in one or more load cells among the plurality of load cells over a set value.

The plurality of load cells includes a first load cell, a second load cell, a third load cell, and a fourth load cell sensing a force acting on the four bodies forming the driving unit, and the entire variable lifting unit maintains a horizontal state. and includes the first load cell, the second load cell, the third load cell, and the fourth load cell while vertically rising and moving the vehicle to a certain height. and a buzzer alarm.

The control unit controls the driving unit to stop or reduce the speed when guiding through a speaker or a display device through a visual or audible signal, or when an unbalanced load occurs while driving.

The present invention provides an initial load display step applied to each of the first load cell, the second load cell, the third load cell, and the fourth load cell installed at the upper end of the driving unit in the preparation stage, which is installed in the form of steps for use by the general public and is waiting for operation; displaying a total load applied to the first load cell, the second load cell, the third load cell, and the fourth load cell when the vehicle arrives at the lower platform and operates the control unit; a passenger boarding detection step of confirming passenger boarding when the total load through the first load cell, the second load cell, the third load cell, and the fourth load cell is equal to or greater than a set value; The first partial load that maintains the entire variable lifting unit in a horizontal state and generates a buzzer alarm when an uneven load is generated in one of the first load cell, the second load cell, the third load cell, and the fourth load cell more than the set value detecting step;

While the entire variable lifting unit maintains a horizontal state and rises vertically to move the vehicle to a certain height, one of the first load cell, the second load cell, the third load cell, and the fourth load cell exceeds a set value. a second partial load detection step of stopping operation and generating a buzzer alarm when an unbalanced load is generated; It further includes; the step of vertically descending while maintaining the entire variable lifting unit in a horizontal state.

The present invention made as described above guides so that it can be safely operated in case of overload detected when 75 kg of rated load is exceeded.

In addition, the present invention is guided by visual and auditory signals to the wheelchair user and immediately warns the user so that he/she can board in the correct position, thereby improving safety.

In addition, the present invention prevents the occurrence of an eccentric load in principle to protect the drive motor and prevent distortion of the overall connected parts, thereby reducing maintenance costs.

1 is a view showing a conventional lift apparatus.
2 is a view showing the overall configuration of the present invention.
3 is a view showing in detail an overload ramp, an upper platform, and a lower platform according to an embodiment of the present invention.
4 is a view showing a load cell driver and a driver loader according to an embodiment of the present invention.
5 is a view showing an appearance according to an embodiment of the present invention.
6 is a view showing the position of the load cell in the internal view according to an embodiment of the present invention.
7 is a view showing a side of FIG. 6 .
8 is a view showing the position of the load cell among the internal view according to another embodiment of the present invention.
FIG. 9 is a view showing a side surface of FIG. 8 .

In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. This example is provided to more completely explain the present invention to those of ordinary skill in the art. Accordingly, the shapes of elements in the drawings may be exaggerated to emphasize a clearer description. It should be noted that the same members in each drawing are sometimes shown with the same reference numerals. In addition, detailed descriptions of well-known functions and configurations determined to unnecessarily obscure the gist of the present invention will be omitted.

In the vertical wheelchair lift for wheelchair users according to the present invention, a device for preventing normal start in case of overload should be installed. However, in the case of hydraulic drive, re-implantation in overload condition is permitted. Overload should be detected when the rated load exceeds 75 kg, and the user should be informed with visual and audible signals in case of overload.

As shown in Figure 1, the present invention is a driving unit 100 that can elevate/lower the wheelchair or stroller on which the elderly or the handicapped are boarded with the driving motor 420, each of which is stretched in length by an external power source; a plurality of guide parts 200 for supporting the driving part 100 so that the rising/lowering of the driving part 100 can be carried out safely and smoothly; By the driving of the driving unit 100, the upper surface is changed from a stair form usable to ordinary people to a flat platform form, and when a vehicle is boarded on the upper part, it rises/falls to safely move the vehicle and then returns to the original form in the form of a staircase. a variable elevating unit 300 that becomes; and a control unit 400 that drives the driving unit 100 by operating a switch to convert the variable lifting unit 300 from a staircase to a platform form.

Here, the driving unit 100 is formed in each corner portion. That is, by driving the driving motor 420 mounted inside the four bodies 110, the variable lifting unit 300 is deformed into a staircase or platform shape, and the variable lifting unit 300 is lifted in a horizontal state, Descend and transfer the wheelchair to the upper platform (G1) or the lower platform (G2).

In addition, first to fourth load cells 410 capable of supporting and sensing the weight load of the variable lifting unit 300 are respectively installed on the upper portions of the four bodies 110 constituting the driving unit 100 , and the first to fourth load cells 410 are respectively installed. The first to fourth load cells 410 are electrically connected to the control unit 400 .

The control unit 400 displays the initial loads applied to the first load cell, the second load cell, the third load cell, and the fourth load cell 410, respectively, in the preparation stage which is installed in the form of a step and is waiting for operation.

Therefore, when the rated load exceeds 75 kg, it can be guided so that it can be operated safely in the event of an overload detected.

Specifically, when the variable elevator 300 in the form of a staircase connecting the upper platform G1 and the lower platform G2 is transformed into a platform shape and the wheelchair is boarded by the variable elevator 300, the control unit 400 The total load applied to the first load cell, the second load cell, the third load cell, and the fourth load cell 410 is displayed.

When the total load is greater than or equal to the set value through the first load cell, the second load cell, the third load cell, and the fourth load cell 410, the passenger boarding is confirmed, and the entire variable lifting unit 300 rises while maintaining a horizontal state. At this time, when an unbalanced load is generated in one of the first load cell, the second load cell, the third load cell, and the fourth load cell 410 over a set value (eg, 100 kg), a buzzer alarm is generated and the display device (not shown) indicates a warning.

Accordingly, the present invention can provide an immediate warning to the wheelchair user by being guided by visual and audible signals.

That is, the present invention relates to a driving unit supporting the variable elevating unit 300, in which the entire variable elevating unit 300 is deformed to maintain a horizontal state with the upper platform or the lower platform, and the wheelchair is boarded with the variable elevating unit ( 100), when an eccentric load occurs in one of the first load cell, the second load cell, the third load cell, and the fourth load cell over a set value (eg, 100 kg), the control unit 400 detects this and a buzzer An alarm is generated, and the operation of the driving unit is stopped.

In addition, the control unit 400 guides the occupant with a visual/auditory signal through a speaker or a display device so that the occupant recognizes this and boards at the correct position of the variable hoisting unit.

The first load cell, the second load cell, the third load cell, and the fourth load cell 410 installed in the driving unit 100 detects an overload and an eccentric load when boarding a wheelchair in the lift state upper and lower platforms.

In addition, by sensing the force acting on the four bodies 110 of the driving unit 100, when an unbalanced load occurs when boarding a wheelchair, a buzzer alarm and a visual display are displayed so that the user can ride in the correct position again.

Accordingly, it is possible to protect the driving motor 420 and prevent distortion of the connected parts as a whole by preventing an eccentric load from occurring on the variable lifting unit 300 in principle.

On the other hand, if an eccentric load occurs while getting on or off while riding, the vehicle can be operated without stopping, while a buzzer alarm and a visual indication are notified, or when an eccentric load occurs while driving, the vehicle can be operated at a reduced speed.

That is, when the wheelchair moves and an eccentric load occurs while the variable lifting unit 300 is raised and lowered in a horizontal state by the driving unit 100 in a state in which the wheelchair is boarded, the first load cell, the second load cell, and the third load cell , and the fourth load cell 410 detects and transmits a signal to the electrically connected control unit 400 to stop the driving of the driving unit 100 or reduce the driving speed to safely lift or descend the variable lifting unit 300 you should be able to do it

Hereinafter, an operation method using the overload detection system by the unbalanced load of the wheelchair lift for stairs of the present invention will be described.

First, the initial load applied to each of the first load cell, the second load cell, the third load cell, and the fourth load cell 410 is displayed in the preparation stage, which is installed in the form of a staircase so that it can be used by the general public and is waiting for operation.

Then, when the vehicle arrives at the lower platform G2 and the control unit 400 is operated, the total load applied to the first load cell, the second load cell, the third load cell, and the fourth load cell 410 is displayed.

Subsequently, when the total load through the first load cell, the second load cell, the third load cell, and the fourth load cell 410 is equal to or greater than the set value, the passenger boarding is checked to detect whether the passenger is boarded.

In addition, the entire variable lifting unit 300 maintains a horizontal state, and a set value (eg, 100 kg) or more is applied to one of the first load cell, the second load cell, the third load cell, and the fourth load cell 410 . When an eccentric load occurs, a buzzer alarm is generated.

For example, an overload detection step of stopping the operation and generating a buzzer alarm (overload alarm) when the total load exceeds the set value of 400 kg; may be added, and if this is solved, that is, normal operation is possible when the overload is released.

Continuously, while the entire variable lifting unit 300 maintains a horizontal state and rises vertically to move the vehicle to a predetermined height, among the first load cell, the second load cell, the third load cell, and the fourth load cell 410 . If an unbalanced load is generated on one load cell over the set value (eg 100 kg), the operation stops and a buzzer alarm occurs.

In addition, it is implemented through a process of receiving a transmission request for the status information of the plurality of load cells 410 from the user terminal, and transmitting the status information of the plurality of load cells to the user terminal. According to the present invention, the user can immediately check the load value measured by the plurality of load cells through the display device of the user terminal.

The load cell 410 includes a load cell unit for sensing a force acting on the four bodies 110 of the driving unit 100; and a control unit for controlling the operation of the transfer unit based on the information sensed by the load cell unit. According to this, since the load cells are installed in each of the four bodies, a synchronous transfer error can be reduced compared to the related art.

The control unit 400 includes a signal measuring unit for measuring a weight signal according to a change in weight from the load cell 410, a timer for calculating a temporal change of the measured weight signal, and a posture of a seated person according to the temporal change of the measured weight signal Alternatively, posture information including the degree of distraction may be calculated.

As described above, the overload detection system and its operation method of the wheelchair lift for stair use according to the present invention guide the safe operation in case of overload detected when the rated load exceeds 75 kg, and provide visual and auditory signals to the wheelchair user. It has the advantage of being informed and immediately warning, and by preventing the occurrence of eccentric load in principle, it protects the drive motor and prevents distortion of the connected parts as a whole, thereby reducing the cost of maintenance and thus industrial applicability is very high. It is a high invention.

100: driving unit 110: body
200: guide unit 300: variable lifting unit
400: control unit 410: load cell
420: drive motor

Claims (5)

A driving unit capable of elevating/lowering a wheelchair or a stroller on which the elderly or the handicapped are boarded, each of which is stretched in length by an external power source; a plurality of guide parts for supporting the driving part so that the rising/lowering of the driving part can be made safely and smoothly; By the driving of the driving unit, the upper surface is changed from a stair form usable to ordinary people to a flat platform form, and when a vehicle is boarded on the upper part, the vehicle is lifted/lowered to safely move the vehicle and then the variable elevating is returned to its original form in the form of a staircase. wealth; a plurality of load cells respectively installed on the upper side of the plurality of driving units, receiving pressure from the load of a wheelchair or a stroller on which the elderly or the handicapped are riding, calculates load information and transmits it to the control unit; A control unit that drives the driving unit by operating a switch to convert the variable lifting unit from a staircase to a platform shape; including,
The control unit is
Displays the initial load applied to each of the plurality of load cells in the preparation stage installed in the form of a step and waiting for operation,
When a vehicle arrives at the lower platform and operates the control unit, the total load applied to the plurality of load cells is displayed,
If the total load is greater than or equal to the set value, check passenger boarding;
The overload detection system by the eccentric load of the wheelchair lift for stairs, characterized in that the entire variable elevator maintains a horizontal state and generates a buzzer alarm when an eccentric load is generated on at least one of the plurality of load cells over a set value .
The method of claim 1,
The plurality of load cells includes a first load cell, a second load cell, a third load cell, and a fourth load cell sensing a force acting on the four bodies forming the driving unit, and the entire variable lifting unit maintains a horizontal state. and includes the first load cell, the second load cell, the third load cell, and the fourth load cell while vertically rising and moving the vehicle to a certain height. And overload detection system by the unbalanced load of the wheelchair lift for stairs, characterized in that the buzzer alarm is generated.
The method of claim 1,
The control unit is
An overload detection system for a wheelchair lift with stairs, characterized in that it guides through a speaker or a display device with a visual or auditory signal, or controls the drive unit to stop or reduce the speed when an unbalanced load occurs during operation .
an initial load display step applied to each of the first load cell, the second load cell, the third load cell, and the fourth load cell installed at the upper end of the driving unit in the preparation stage, which is installed in the form of a staircase for use by the public and is waiting for operation;
displaying a total load applied to the first load cell, the second load cell, the third load cell, and the fourth load cell when the vehicle arrives at the lower platform and operates the control unit;
a passenger boarding detection step of confirming passenger boarding when the total load through the first load cell, the second load cell, the third load cell, and the fourth load cell is equal to or greater than a set value;
The first partial load that maintains the entire variable lifting unit in a horizontal state and generates a buzzer alarm when an unbalanced load is generated in one of the first, second, third, and fourth load cells more than a set value Detecting step; Method of operation of the overload detection system by the unbalanced load of the wheelchair lift with stairs, characterized in that it includes.
5. The method of claim 4,
While the entire variable elevating unit maintains a horizontal state and rises vertically to move the vehicle to a certain height, one of the first load cell, the second load cell, the third load cell, and the fourth load cell exceeds a set value. A second partial load detection step of generating an operation stop and a buzzer alarm when an unbalanced load is generated; The operation method of the overload detection system by the unbalanced load of the stair-combined wheelchair lift, characterized in that it further comprises a;

Images