Staircase floor lifting device.

Abstract

In the homes where elderly people are accustomed to living, the knee joints are subjected to a lot of stress when going up and down stairs, especially when going down them, which causes frequent falls and can lead to serious health problems such as fractures, hospitalization, and even becoming bedridden or experiencing the progression of dementia. [Solution] Hydraulic bags containing hydraulic oil are placed under the treads of each staircase, and the hydraulic bags are connected to each other by hoses with control valves. When the operating lever inside the handrail is gripped, the wire opens the control valve, and the hydraulic oil is pushed out by the user's weight, causing the treads to descend. The pushed-out hydraulic oil is injected into an empty hydraulic bag container on the floor below, causing the treads on the lower floor to rise and be at the same floor height. This provides an inexpensive, non-powered elevator "specialized for descending," allowing users to easily descend to the floor below without bending their knees.

Description

[Technical Field]

[0001] The present invention relates to a stair lift. [Background technology]

[0002] In recent years, the elderly population has increased, and many people continue to live in their familiar homes despite their weakened legs and backs.

[0003] Even though people are used to living in their homes, as they get older, when they go up and down the stairs to the second floor, the strength in their legs, hips and knees weakens, and many people fall down the stairs.

[0004] Once an elderly person falls and breaks a bone, it takes a long time for them to recover, and in many cases the fall leads to them becoming bedridden and fighting an illness. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication No. 2002-356167 Summary of the Invention [Problem to be solved by the invention]

[0006] Falls on the stairs of the elderly's familiar homes can pose serious problems, leading to fractures and bedriddenness.

[0007] Even a single fall can easily lead to becoming bedridden, and changes in lifestyle due to fractures or hospitalization can lead to the progression of dementia or a need for care.

[0008] The main causes of accidents on stairs are a decrease in muscle strength and balance, as well as a weakening of the thigh and ankle muscles, which can lead to tripping or slipping when going up or down the stairs.

[0009] In addition, declining eyesight makes it difficult to recognize steps, increasing the risk of tripping, and accidents are triggered by poor environmental conditions, such as lack of handrails, poor lighting, and slippery slippers.

[0010] The reason why the overwhelming majority of falls occur when going up and down stairs is due to a combination of physical, psychological, and environmental factors, such as:

[0011] An effective measure is to install handrails on both sides of the stairs at a height that is easy to grasp (70-80cm).

[0012] Strengthen lighting, and use brighter lights and motion sensor lights to make steps more clearly visible.

[0013] Measures to prevent slipping on stairs, such as applying anti-slip sheets to staircase floors and wearing non-slip footwear.

[0014] Maintain physical function through strength and balance exercises, squats and stretches.

[0015] Introducing stair lifts, allowing people to climb and descend stairs safely while sitting on chair lifts.

[0016] When going up and down stairs, falls occur far more frequently when going down than when going up.

[0017] The most common reasons for "going down" stairs are a combination of physical, psychological and environmental factors.

[0018] The reason why people often fall when going down stairs is because their center of gravity tends to tilt forward.

[0019] When going down stairs, gravity pulls your body forward, making it easy to lean forward and lose your balance.

[0020] Once you lose your balance, you won't have enough room to put your feet out, which will lead directly to a fall.

[0021] Visibility is reduced and it is necessary to check the steps underfoot as you descend, but poor eyesight and insufficient lighting make it difficult to see the steps, resulting in unclear recognition.

[0022] When going up stairs, the steps naturally appear closer and your eyes are directed in a clearer direction, but when going down stairs, the steps and your feet appear farther away, making it easy to fall into blind spots.

[0023] Furthermore, when going down stairs, the force exerted on the knee, especially on one leg, is greater than when going up, which can lead to falls if the knee is unable to support the force. Also, due to weakened muscles caused by aging, many elderly people find it difficult to go up and down to the second floor of their homes where they have lived for many years, and are forced to live on the first floor alone. The number of elderly people facing this reality is increasing.

[0024] When elderly or physically frail people go down stairs at home, there are many cases of them falling forward due to weakened knee joints and other factors. However, most existing climbing assistance devices to address this issue are designed to assist with both going up and down stairs, but there have been no devices designed for general residential use that are "specialized for the act of going down stairs" from the second floor.

[0025] As the population ages, many of the falls occurring in homes are caused by uneven flooring or stairs, and this is particularly prevalent among the elderly. As elderly people age, the strength of the muscles that bend their knees and support their weight tends to decrease, and when going up and down stairs, the knee joint is subjected to greater strain than when going up.

[0026] As a result, when going down stairs, the knee joints are unable to support the body weight, causing frequent accidents in which people lose balance and fall forward.

[0027] In light of the reality that there are more falls when descending stairs than when going up, there is a demand for an inexpensive elevator that is "specialized for use in descending stairs" and meets the needs of those who want to reduce the physical burden of descending stairs and move safely and stably to the next floor. [Means for solving the problem]

[0028] This relates to a hydraulic mechanism that adds a function to assist in ascending and descending to each step of a staircase without making any changes to the staircase structure of an existing home, and aims to improve safety and convenience by installing a tread elevation device of the present invention that is "specialized for descending" on the floor of the staircase of an existing home.

[0029] Specifically, hydraulic fluid is filled in a hydraulic bag container placed on the underside of the step, and the weight of a person standing on the step compresses the hydraulic bag container, discharging the hydraulic fluid. The discharged hydraulic fluid is then released into an empty hydraulic bag container placed on the underside of the lower step, causing the hydraulic bag container to expand and lift the upper step. This lifting device utilizes the weight of a person standing on the step. The lifting device of the present invention is installed on the tread surface of each staircase floor, and a hydraulic bag container filled with hydraulic fluid is placed on the underside of the tread of the lifting device. These hydraulic bag containers for each staircase are then interconnected by hydraulic hoses equipped with control valves, resulting in a lifting device with continuous and controllable lifting function throughout the entire staircase.

[0030] The lifting device of the present invention is equipped with a step plate having dimensions similar to those of an existing staircase floor, and a deformable rectangular parallelepiped or cylindrical bag-like container that can withstand hydraulic pressure is provided on the underside of the step plate. The bag-like container functions as part of the hydraulic mechanism that enables the lifting operation, and a hydraulic hose is connected to the bottom of the container.

[0031] Each wire extending from the operating lever for each staircase installed inside the handrail is connected to a control valve, and hydraulic hoses equipped with control valves connect each hydraulic bag-like container in sequence, allowing the flow of hydraulic oil in each bag-like container to be selectively and controlled by operating the lever via the control valve.This mechanism functions as a lifting mechanism that controls the expansion and contraction of the hydraulic bag-like containers for the entire staircase.

[0032] The inflow and outflow of hydraulic oil in the hydraulic bag container is controlled by an operating lever installed in the handrail beside each staircase. When a person grips the operating lever, it is accurately interpreted as a "descending action," and accordingly hydraulic oil flows out of the hydraulic bag container, causing the hydraulic bag container to contract and the tread to descend.

[0033] The operating lever is connected to a control valve via a connecting wire, and when the user grips the operating lever, the wire is pulled, opening the control valve, allowing hydraulic oil to flow through the hydraulic hoses between the hydraulic bags. This flow of hydraulic oil operates the lifting device, providing the required function of ascending or descending stairs.

[0034] In this lifting device, hydraulic oil is pre-filled in a hydraulic bag container located under the tread of the top floor staircase floor, located below the landing on the second floor. When a user places both feet on the tread and places them on the guide mark, they grasp the operating lever located in the handrail. A wire connected to the operating lever pulls the control valve, which opens the control valve.

[0035] As a result, the weight of the user standing on the step applies pressure to the hydraulic oil filled in the hydraulic bag container below the step, and the pressurized hydraulic oil is transferred through the hydraulic hose to the empty hydraulic bag container located below the step on the floor below. The injected hydraulic oil causes the hydraulic bag container on the floor below to expand, and as a result, the step on the floor below rises.

[0036] When a user steps onto the step, the pressure of their weight acts on the hydraulic bag container located on the underside of the step. The hydraulic oil filled in the hydraulic bag container is pressurized by the person's weight and gradually discharged through the hydraulic hose. As the hydraulic oil flows out, the volume of the hydraulic bag container shrinks, and the step gradually descends at a controlled speed. This allows the user to descend the stairs steadily and safely.

[0037] The step on which the user stands descends as hydraulic fluid is gradually discharged from the hydraulic bag container located on the backside. Once the hydraulic fluid has been discharged and the pressure in the hydraulic bag container has stabilized, the step stops descending. In response to this, hydraulic fluid is transferred to the hydraulic bag container located below the step on the lower floor, causing the hydraulic bag container to expand, raising the step on the lower floor. As a result, the raised step on the lower floor reaches the same height as the step on which the user has finished descending, creating a level floor surface without any steps.

[0038] The lifting device according to the present invention is configured to enable a user to move safely and smoothly to the next staircase in a staircase structure without bending or straightening their knees. Specifically, the hydraulic fluid in the hydraulic bag container of the step on which the user is standing is discharged, causing the step to descend, and then the step below rises so that the heights of the steps are the same.

[0039] Once the heights are aligned, the user can step forward without bending their knees and place both feet together on the raised step below. When the user then grasps the operating lever inside the handrail again, the wire is pulled, opening the control valve and discharging hydraulic oil, causing the step the user is standing on to descend again. At the same time, the step on the lower staircase rises. This action is repeated, allowing the user to safely descend the stairs, one step at a time, without bending their knees.

[0040] The lifting device of the present invention allows a user to safely and stably descend stairs without bending their knees. The lifting device is composed of a wire-equipped operating lever installed in a handrail, a tread that can be raised and lowered and is installed on the stairs, a hydraulic bag container installed on the backside of the tread, and a hydraulic hose and control valve connected to the hydraulic bag container.

[0041] This lifting device has a configuration in which a step installed on the lower stair rises in response to a user's stepping, and reaches the same height as the step of the stair. When the user places both feet together on the raised step and grips the operating lever in the handrail, the control valve opens and the hydraulic oil filled in the hydraulic bag container located under the step is pushed out by the weight of the person. As the hydraulic oil is discharged, the hydraulic bag container contracts and the step gradually descends at a controlled speed. At this time, the discharged hydraulic oil is poured into an empty hydraulic bag container installed below, and the container expands as the hydraulic oil fills it, causing the step below to rise.

[0042] With this configuration, the lifting device does not require an electric hydraulic pump or external drive device to pressurize the hydraulic oil, and is able to achieve hydraulic circulation that pushes the hydraulic oil using only the user's weight as a power source. This allows the elevator to function as a "descent-only" elevator to be used when descending stairs. [Effects of the Invention]

[0043] The main effect of introducing this device is that it reduces the physical load when going up and down stairs, thereby reducing the risk of falls and decreasing the incidence of fall accidents.

[0044] Improved cost-effectiveness: The product price of the device is significantly lower than that of commercially available seat-type electric lifts, making it highly likely to become popular in ordinary households.

[0045] It is easy to operate, does not require specialized knowledge, and has a simple design that makes it easy to use on a daily basis, contributing to supporting users' independence.

[0046] Flexible installation, no complicated construction work required, easy installation in existing homes, and few barriers to adoption.

[0047] By improving psychological security and reducing the anxiety felt when going up and down stairs that increases with age and physical decline, residents can continue living in the homes they have lived in for many years, even as they get older, which gives them a sense of security.

[0048] Seat-type electric lifting devices are commercially available as auxiliary devices for climbing stairs, but these are usually expensive, costing anywhere from several hundred thousand to several million yen, and there are major cost constraints on their widespread use in ordinary households.However, by significantly reducing the price of this lifting device, it will become widespread and an indispensable item that is close to home.

[0049] The present invention aims to prevent accidents that occur when descending stairs by providing a "descent-only" lifting device that does not require any external drive parts such as a starting device or electric motor, and is constructed with a structure that uses only the weight of the human body as a power source.The components and structure are extremely simple, and it is non-powered, requiring no external power source starting device at all.It has very few components, and therefore requires low manufacturing and maintenance costs.

[0050] The present invention is a non-powered "descent-only lifting device" that can be easily installed without structural modifications to the staircase structure of an existing home, and is configured to be easily installed without tools by using an adhesive method such as double-sided adhesive tape to one end of the tread floor of an existing staircase in an ordinary home.

[0051] When a person descends the stairs, the control valve is activated by the natural action of grasping the operating lever in the handrail, causing the tread to gradually descend.This makes the device safe and easy to operate, without requiring any special operating methods or complex control devices.

[0052] The lifting device of the present invention can be attached to existing stairs simply by gluing, without the need for any modifications, making it easy and quick to install. Furthermore, the device and operation are extremely simple, making it safe for use by the elderly and others. Because it is a non-powered structure that does not require an external power source or drive device, manufacturing costs can be significantly reduced, making it possible to offer it as an ultra-low-cost product. [Brief explanation of the drawings]

[0053] [Figure 1] FIG. [Figure 2]FIG. 10 is a partially enlarged perspective view showing the footboard and the hydraulic reservoir bag. [Figure 3] FIG. 1 is a perspective view showing the arrangement of control valves on hydraulic hoses. [Figure 4] FIG. 1 is a perspective side view of an elevator installed on the top floor. [Figure 5] A side perspective view of the inflated hydraulic bag container when the stairs to the top floor are ascending. [Figure 6] A side perspective view of the hydraulic reservoir bag deflated when the top floor stairs are lowered. [Figure 7] A perspective view of a genuine lifting device installed at the right end of an existing descending staircase. [Figure 8] This is a perspective view showing hydraulic oil filled with the load of people moving into an empty hydraulic bag container below, causing the hydraulic container to expand. [Figure 9] An electromagnetic pump installed next to the control valve on the hydraulic hose. [Figure 10] FIG. [Figure 11] An enlarged perspective view of a wire with a lever connected to a control valve installed inside the handrail. [Figure 12] A schematic diagram showing the operating lever and wire inside the handrail installed on the staircase side. [Example]

[0054] The embodiments are described below with reference to the drawings and their reference numerals. The present invention is a device that can be easily attached to existing stairs, and in particular, it uses a hydraulic bag container to achieve lifting and lowering functions, and has a simple structure that allows the lower part of the hydraulic bag container to be installed with adhesive or double-sided adhesive tape.

[0055] This lifting device is constructed by placing a hydraulic bag container 3 between an upper tread 2 and a lower fixed plate 1. The lower fixed plate 1 is adhered and fixed to the existing stair floor surface using adhesive or double-sided tape with strong adhesive power (see reference figures 1 and 4).

[0056] The lifting device comprises a hydraulic bag container 3 arranged between an upper step plate 2 and a lower fixed plate 1, the hydraulic bag container 3 being a flexible and pressure-resistant structure, the upper and lower surfaces of which are fixed to the step plate 2 and the lower fixed plate 1, respectively.

[0057] Furthermore, a hydraulic hose 4 is provided in the center of the underside of the hydraulic bag container 3, and when hydraulic fluid is supplied or discharged through the hose 4, the internal pressure of the bag container changes, and as a result, the footboard 2 moves up and down, realizing a lifting function.

[0058] A hydraulic hose 4 is provided at the center of the bottom of the hydraulic bag container 3, and a control valve 5 is installed on the hydraulic hose 4. The control valve 5 is used to timely control the flow rate of hydraulic oil supplied to or discharged from the hydraulic bag container 3 with an operating lever. This allows stable control of the operation of the lifting device.

[0059] A handrail is installed on the side of the stairs where the lifting device is to be installed.

[0060] Furthermore, there is a handrail attached to the side of each staircase that has a lever that can be operated by hand (Figure 11).

[0061] Guidance marks for aligning both feet on the step 2 and operating levers provided in the handrails for operating to descend stairs are also provided in the handrails beside each staircase.

[0062] By gripping the operating lever in the handrail beside each staircase, the treads of the staircase floor descend one step at a time.With the above-mentioned configuration, this lifting device can be easily installed on existing staircase floors without requiring any modifications, and a stair-lowering device has been realized in which the treads rise and fall stably by pressurizing and depressurizing the hydraulic bag container (Fig. 10). Example 1

[0063] In this example, the materials, dimensions, etc. of each component are described based on a prototype, along with the figures and symbols shown below. The prototype relates to a staircase structure for a general residential building, and the relevant dimensions comply with the Building Standards Act. The standard dimensions for a staircase structure are as follows: rise height: 23 cm or less, tread depth: 15 cm or more, stair width (including landing): 75 cm or more, tread width: approximately less than 90 cm. Based on these dimensions, the materials and arrangement of each component are shown in Figures 1 to 12 (see list of symbols).

[0064] In the staircase structure according to the present invention, the step 2 and the lower fixed plate 1 are each made of plywood, 300 mm wide, 300 mm deep, and 12 mm thick (see Figures 1 and 2). A hydraulic bag container 3 is sandwiched between the step 2 and the fixed plate 1, and a hydraulic hose 4 is attached to the center of the lower part of the hydraulic bag container 3. (The step may be made of resin, cast aluminum, or other materials.)

[0065] Between the footboard 2 and the fixed plate 1, a hydraulic bag container 3 filled with hydraulic oil is arranged. The hydraulic bag container 3 has dimensions of 280 mm in width and 280 mm in depth, and the thickness of the body is approximately 30 mm to 35 mm when minimally contracted, and 240 mm when fully expanded with hydraulic oil filled. The hydraulic bag container 3 is made of a thick vinyl bag with high pressure resistance and excellent oil resistance (oil-resistant rubber material may also be used).

[0066] Furthermore, a hydraulic hose 4 is attached to the center of the bottom of the hydraulic bag container 3, and this hydraulic hose 4 is connected to other hydraulic bag containers 3 and is a hydraulic hose for transporting hydraulic oil.

[0067] The hydraulic hose 4 has an inner diameter of 6mm to 9mm and an outer diameter of 9mm to 12mm, and is made of rubber or synthetic resin material with excellent pressure and oil resistance, and has a multi-layer structure consisting of an inner layer, a reinforcing layer (wire braid, etc.), and an outer layer, which guides the hydraulic oil filled in the hydraulic bag container 3 to another hydraulic bag container, forming a fluid control path that moves up and down the stair tread surface (commercially available air hose material, etc. may also be used).

[0068] A control valve 5 is provided on the hydraulic hose 4 connecting each hydraulic bag container 3, and the control valve 5 is configured to be activated when a person stands on the guide mark 6 on the tread surface and grips the operating lever 18 in the staircase handrail.

[0069] By gripping the operating lever 18 (Figure 11) installed inside the handrail (operating lever built into the handrail, symbol 18 in Figure 12), the wire 8-4 is pulled and the control valve 5 is activated, confirming that the person is grasping the lever, which is the awareness of the person's "descending action" on the stair tread, and is an important component for opening the control valve.

[0070] In this staircase structure, existing handrails 12 are provided on the sides of the stairs (see Figure 10). These handrails also function as supports for users to place their hands on when ascending or descending to prevent accidental falls.

[0071] Furthermore, the handrails 12 located beside each step have built-in operating levers for the device, and the step can only be lowered by the user gripping the lever.

[0072] The step only descends when the operating lever is gripped; it does not move up or down under normal circumstances.

[0073] This elevator was invented with the aim of preventing falls caused by tripping on the stairs when descending from the second floor to the floor below. Unlike conventional elevators, this elevator has a structure that is specialized for the "descent operation." The installation and usage procedures for this elevator are described below.

[0074] Procedure for installing a lifting device on a staircase floor: When installing a lifting device (see Figure 1) on a staircase floor in a residence, follow the steps below (see Figure 10).

[0075] Double-sided adhesive tape is already attached to the back of fixing plate 1. Carefully peel off the protective paper (top paper) from the adhesive tape.

[0076] The width of the staircase floor is approximately 90 cm, so when installing the lifting device, use the left edge of the staircase floor as the reference point when facing the floor above, press the lifting device firmly against the left edge of the staircase floor, and then secure it to each stair in its designated position (see Figure 10).

[0077] It consists of multiple lifting device treads installed individually on each staircase floor, and each lifting device is connected to a hydraulic hose 4 equipped with a control valve 5, and these hydraulic hoses 4 are connected to each other via hose joints (Figure 9).

[0078] The control valve 5 opens and closes when the operator grips the operating lever 18 attached to the handrail 12, and is opened and closed by being pulled by the wire 8-4. When the control valve 5 opens, the hydraulic oil is pushed out of the hydraulic bag container by the weight of the person, causing the footboard to descend. Once the footboard has finished descending and the operator releases their hand from the handrail, the control valve closes.

[0079] In the lifting mechanism of the present invention, multiple lifting devices are installed on each step of the stairs, and only for the hydraulic bag container 3 located on the top step of these lifting devices, the connecting hose joint of the hydraulic hose 4 is temporarily removed, and hydraulic oil is injected and filled through the removed joint.

[0080] With this filling method, the hydraulic oil in the hydraulic bag container 3 is transferred sequentially to the empty hydraulic bag containers of other lifting devices through the connected hydraulic hoses 4, enabling efficient lifting control with hydraulic oil circulating throughout the entire staircase.

[0081] When the lifting device is in use, the step 2 located at the bottom of the second floor landing rises as hydraulic oil is filled into the hydraulic bag container 3, and the step 2 is controlled so that it is at the same height as the floor of the landing (the rise height of existing stairs is said to be around 210 mm, but the expanded height of the hydraulic bag container of this invention is approximately 180 mm to 210 mm).

[0082] Before descending, the user steps forward with both feet together, following the guide marks 6 on the step 2. Then, by gripping the operating lever 18 provided inside the handrail, the control valve 5 is opened, and hydraulic oil is discharged from the hydraulic bag container, starting the step's downward movement.

[0083] When the control valve 5 installed on the hydraulic hose 4 opens, the hydraulic oil in the hydraulic bag container 3 begins to move to the empty hydraulic bag container 3 on the floor below. The hydraulic oil moves sequentially between the hydraulic bag containers for each staircase, and the hydraulic oil pushed out by the hydraulic bag container 3 under the bottom staircase shrinks moves to and fills the hydraulic bag container 3 on the stairs under the landing on the second floor. It is also possible to use tap water as the hydraulic oil, as it is easy to handle and inexpensive.

[0084] When the control valve opens, hydraulic oil is discharged from the expanded hydraulic bag container 3, and the step plate moves flexibly and descends, allowing the user to descend to the lower floor safely and stably.

[0085] A control valve is provided to control the release of hydraulic oil from the hydraulic bag container 3 described above, and the control valve is operated by a wire connected to an operating lever located inside the handrail. When the user grips the operating lever, the control valve opens and closes, controlling the flow of hydraulic oil. The action of "gripping the lever" functions as a clear trigger to start the operation of the lifting mechanism, eliminating the need for various sensors to check the operation of the step board, and the mechanism functions as a drive mechanism for the step board (Figure 12).

[0086] Specifically, an operating lever and wire are installed inside the handrail on each step side, and when the user grips the lever, the control valve is pulled by the wire, opening the control valve that controls the hydraulic oil pressurized by the weight of the person in the hydraulic bag container. This releases the hydraulic oil and starts the step 2 descending. Releasing the lever or loosening the grip closes the control valve, stopping or limiting the release of hydraulic oil.

[0087] By using this lever operation, the user's intention to "go down" is reliably confirmed, so there is no need for a detection sensor or the like to confirm the action.

[0088] As described above, by utilizing existing general-purpose products, such as an inflatable bag container (a thick plastic bag), a brake lever wire (a bicycle brake lever), and a control valve (a lever valve on a water supply pipe), a safe "stair descending device" can be made with a simple combination of only a few components, and this device can be offered at an extremely low price compared to conventional lifting devices available on the market.

[0089] By making the lifting device ultra-compact and positioning it on one side of the stairs, the other side can be used as a conventional staircase, making it possible to make effective use of the staircase space; see Figure 10. The lifting device is installed along one side of the stairs (for example, the left side when facing the upper floor), and the width of the lifting device is made small compared to the width of the stairs (the tread width is about 25 to 30 cm), as shown in Figure 7, and the remaining space on the right side (about 60 to 65 cm) can be used as a normal staircase passage.

[0090] This is a small elevator "for descending" that can efficiently utilize the entire staircase space and allows both able-bodied people and those who need assistance ascending and descending to use the stairs at the same time. [Explanation of symbols]

[0091] 1 fixed plate 2 treads 3 Hydraulic bag container 3-1 Arrows showing the direction in which the hydraulic bag container contracts and the flow of hydraulic oil 3-2 Arrows showing the direction of hydraulic bag container expansion and hydraulic oil flow 4 hydraulic hoses 5 control valve 6. Correct standing position guide mark 7 Cover for the operating lever built into the handrail 8 Hydraulic oil 8-1 Arrows showing the flow of circulating hydraulic oil 8-3 Operating lever installed inside the handrail 8-4 Wire connecting to the control valve integrated with the operating lever 18 Lever wire to operate the control valve on the 8-5 hydraulic hose 9 stairs 9-1 Second floor landing floor 10 Existing stairs 11 Electromagnetic pump 12 handrails 13 Electromagnetic valve 14 Compressor 18 Control lever 18-1 Wire integrated with the operating lever

Claims

1. a wire-attached operating lever disposed within a handrail provided on the side of the stairs; A step board that can be moved up and down, a hydraulic bag container capable of contracting and expanding, disposed on the underside of the footboard; hydraulic oil filled in the hydraulic bag container; a connecting means for connecting the plurality of hydraulic bag containers to each other by hydraulic hoses; and a control valve that controls the flow rate of the hydraulic oil flowing through the hydraulic hose, A staircase floor lifting device characterized in that the wire is pulled by operating the operating lever to control the opening and closing of the control valve, and the hydraulic oil in the hydraulic bag container is pressurized by the load generated when a user stands on the step, causing the hydraulic bag container to contract or expand, thereby moving the step up and down.

2. In the staircase floor lifting device, a hydraulic bag container that expands and contracts by injecting or extracting hydraulic oil is arranged on the back surface of the tread provided on the floor portion of each stair, the hydraulic bag containers are connected to each other by hydraulic hoses, and the hydraulic hoses are provided with control valves that control the hydraulic oil fluid supplied to the hydraulic bag containers.

3. In the staircase floor lifting device described in claim 1, a hydraulic bag container is placed on the backside of the tread, and the hydraulic bag container is filled with hydraulic oil.When a person stands on the tread, the hydraulic oil in the hydraulic bag container is pressurized through a hydraulic hose by the load and transferred to an empty hydraulic bag container provided on the backside of the tread located below the staircase.When the hydraulic bag container under load contracts as the hydraulic oil is discharged, on the other hand, the lower hydraulic bag container into which the hydraulic oil has flowed expands, causing the tread to rise.

4. In the staircase floor lifting device, an operating lever is arranged within the handrail, a wire is connected to the operating lever, and when a user grips the operating lever, the control valve is pulled via the wire, thereby controlling the opening and closing of the control valve.

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