Design method of retractable hidden wheelchair ramp

Abstract

This invention discloses a design method for a retractable, concealed wheelchair ramp. All steps are executed by computer. Based on whether the number of steps (n) corresponding to the ramp to be designed is less than or equal to 5 and less than or equal to 10, it determines whether a rest platform is needed and the number of rest platforms required. Then, it calculates the horizontal length, total length, and length of each of the concealed folding steps in the ramp to be designed. This invention can reconstruct a ramp using existing steps by installing concealed, retractable steps.

Description

Technical Field

[0001] This invention relates to the field of computer-aided design technology, and in particular to a design method for retractable, concealed wheelchair ramps. Background Technology

[0002] As the public's demand for accessible pathways continues to increase, it is an inevitable trend to install accessible ramps where there are steps in outdoor spaces to ensure that all citizens, including people with mobility impairments, can equally enjoy urban spaces.

[0003] However, many outdoor spaces in cities are currently limited, resulting in a lack of space or inadequate designation of accessible ramps. This situation not only restricts the freedom of movement for citizens with mobility impairments but also affects their opportunities to participate in social activities, thereby reducing their quality of life and social engagement. The inability to install accessible ramps or their improper design creates obstacles for citizens with mobility impairments, causing inconvenience not only to them personally but also reflecting shortcomings in the city's accessibility infrastructure.

[0004] Therefore, redesigning the construction method of barrier-free ramps and how to rebuild ramps by using existing steps and setting up hidden retractable steps while meeting the requirements of barrier-free standards has become a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of the above-mentioned deficiencies of the prior art, the present invention provides a design for a retractable hidden wheelchair ramp, the purpose of which is to be able to reconstruct and set up a hidden retractable step to build a ramp using existing steps.

[0006] To achieve the above objectives, this invention discloses a design for a retractable, concealed wheelchair ramp, employing a computer to execute all steps; characterized by comprising the following steps:

[0007] Step 1: Determine whether the number of steps n corresponding to the wheelchair ramp to be designed is less than or equal to 5;

[0008] If the number of steps n≤5, then there is no need to set up a rest platform, and proceed to step A2;

[0009] If the number of steps n > 5, then the rest platform needs to be set up, and step B2 should be executed;

[0010] Step A2: Using the highest step as a storage box for the hidden folding pedals, calculate the horizontal length L0 = H0 / α and the total length of the wheelchair ramp to be designed. And the length of each pedal in the hidden folding pedal is l = L / n;

[0011] Wherein, H0 is the height of the wheelchair ramp and its corresponding steps; α is the longitudinal slope of the wheelchair ramp to be designed;

[0012] Step B2: Determine whether the number of steps n is less than or equal to 10;

[0013] If the number of steps n≤10, then a rest platform needs to be set up, and step B3 should be executed;

[0014] If the number of steps n > 10, then two rest platforms need to be set up, and step C3 should be executed.

[0015] Step B3: Using the highest step as the storage box for the first section of the hidden folding pedal, and the rest platform as the storage box for the second section of the hidden folding pedal, calculate the horizontal length L0 of the wheelchair ramp to be designed: L0 = n1(H0 / n) / α + L' + n2(H0 / n) / α.

[0016] Total length

[0017] The length of each of the hidden folding pedals described in the first paragraph

[0018] and the length of each of the hidden folding pedals described in the second paragraph.

[0019] Wherein, n1 is the number of steps corresponding to the hidden folding pedal in the first paragraph; n2 is the number of steps corresponding to the hidden folding pedal in the second paragraph; L' is the length of the rest platform, l2≤L';

[0020] Step C3: Use the highest step as the storage box for the first section of the hidden folding pedal, and use the two rest platforms as storage boxes for the second and third sections of the hidden folding pedal, respectively. Calculate the horizontal length L0 of the wheelchair ramp to be designed: L0 = n1(H0 / n) / α + L'1 + n2(H0 / n) / α + L'2 + n3(H0 / n) / α.

[0021] Total length

[0022] and the length of each of the hidden folding pedals described in the first paragraph.

[0023] The length of each of the hidden folding pedals described in the second paragraph

[0024] The length of each of the hidden folding pedals described in the third paragraph

[0025] Wherein, n1 is the number of steps corresponding to the hidden folding pedal in the first paragraph; n2 is the number of steps corresponding to the hidden folding pedal in the second paragraph; n3 is the number of steps corresponding to the hidden folding pedal in the third paragraph; L'1 is the length of the rest platform in the first paragraph, l2≤L'1; L'2 is the length of the rest platform in the second paragraph, l3≤L'2.

[0026] Preferably, the length of each rest platform is not less than 1500 mm, and both ends are raised and lowered by jacks.

[0027] Preferably, after any of the hidden folding pedals is unfolded, a jack is provided on the ground at the junction of every two adjacent pedals, and the pedals are supported by the lifting rods of the corresponding jacks.

[0028] Preferably, before performing step 1, the steps and the extended cross-sectional view of the wheelchair ramp to be designed are drawn using Tianzheng CAD software, and H0 and n are defined; the extension direction of the wheelchair ramp is considered to be free of obstacles.

[0029] The beneficial effects of this invention are:

[0030] This invention enables the reconstruction of existing steps by setting up hidden retractable steps to build ramps.

[0031] The following will further explain the concept, specific structure, and technical effects of the present invention in conjunction with the accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Attached Figure Description

[0032] Figure 1 The following is a flowchart illustrating the execution of an embodiment of the present invention.

[0033] Figure 2 This diagram shows a wheelchair ramp corresponding to 5 steps that is not deployed in one embodiment of the present invention.

[0034] Figure 3 This diagram illustrates the unfolding of a wheelchair ramp corresponding to 5 steps in one embodiment of the present invention.

[0035] Figure 4 This diagram shows a wheelchair ramp corresponding to 9 steps that is not deployed in one embodiment of the present invention.

[0036] Figure 5 This diagram illustrates the unfolding of a wheelchair ramp corresponding to 9 steps in one embodiment of the present invention. Detailed Implementation

[0037] Example

[0038] like Figure 1As shown, the design of the retractable hidden wheelchair ramp utilizes a computer to execute all steps; its key feature is that it includes the following steps:

[0039] Step 1: Determine whether the number of steps n corresponding to the wheelchair ramp to be designed is less than or equal to 5;

[0040] If the number of steps n≤5, then there is no need to set up a rest platform, and proceed to step A2;

[0041] If the number of steps n > 5, then the rest platform needs to be set up, and step B2 should be executed;

[0042] Step A2: Using the highest step as a storage box for the hidden folding pedals, calculate the horizontal length L0 = H0 / α and the total length of the wheelchair ramp to be designed. And the length of each pedal in the hidden folding pedal is l = L / n;

[0043] Wherein, H0 is the height of the wheelchair ramp and its corresponding steps;

[0044] Step B2: Determine whether the number of steps n is less than or equal to 10;

[0045] If the number of steps n≤10, then a rest platform needs to be set up, and step B3 should be executed;

[0046] If the number of steps n > 10, then two rest platforms need to be set up, and step C3 should be executed.

[0047] Step B3: Using the highest step as the storage box for the first section of the hidden folding pedal, and the rest platform as the storage box for the second section of the hidden folding pedal, calculate the horizontal length L0 of the wheelchair ramp to be designed: L0 = n1(H0 / n) / α + L' + n2(H0 / n) / α.

[0048] Total length

[0049] The length of each of the hidden folding pedals described in the first paragraph

[0050] and the length of each of the hidden folding pedals described in the second paragraph.

[0051] Wherein, n1 is the number of steps corresponding to the hidden folding pedal in the first paragraph; n2 is the number of steps corresponding to the hidden folding pedal in the second paragraph; L' is the length of the rest platform, l2≤L';

[0052] Step C3: Use the highest step as the storage box for the first section of the hidden folding pedal, and use the two rest platforms as storage boxes for the second and third sections of the hidden folding pedal, respectively. Calculate the horizontal length L0 of the wheelchair ramp to be designed: L0 = n1(H0 / n) / α + L'1 + n2(H0 / n) / α + L'2 + n3(H0 / n) / α.

[0053] Total length

[0054] and the length of each of the hidden folding pedals described in the first paragraph.

[0055] The length of each of the hidden folding pedals described in the second paragraph

[0056] The length of each of the hidden folding pedals described in the third paragraph

[0057] Wherein, n1 is the number of steps corresponding to the hidden folding pedal in the first paragraph; n2 is the number of steps corresponding to the hidden folding pedal in the second paragraph; n3 is the number of steps corresponding to the hidden folding pedal in the third paragraph; L'1 is the length of the rest platform in the first paragraph, l2≤L'1; L'2 is the length of the rest platform in the second paragraph, l3≤L'2.

[0058] In some embodiments, each rest platform is at least 1500 mm long and is raised or lowered at both ends by jacks.

[0059] In some embodiments, after any hidden folding pedal is unfolded, a jack is provided on the ground at the junction of every two adjacent pedals, and the pedals are supported by the jack rods that are raised by the jacks.

[0060] In some embodiments, before performing step 1, the extended cross-sectional view of the steps and the wheelchair ramp to be designed is drawn using Tianzheng CAD software, and H0 and n are defined; the extension direction of the wheelchair ramp is considered to be free of obstructions.

[0061] In practical applications, in accordance with the general requirements of the accessibility standards for buildings and municipal engineering, when the ramp lift height H0 > 750mm, a rest platform must be provided. The longitudinal slope α of the wheelchair ramp to be designed should be ≤ 1:12. The lift height of each ramp section should not exceed 750mm. The clear width of the starting point, ending point and rest platform of the wheelchair ramp should not be less than the clear width of the ramp.

[0062] like Figure 2 and Figure 3As shown, assuming the ramp lifting height H0≤750mm and n≤5, no rest platform is required.

[0063] Step A2 involves using the height difference of the first step to set up a hidden folding pedal storage box, arranging support points along the original path, and determining the length of each pedal segment through calculation.

[0064] The horizontal length of the ramp is L0 = H0 / α;

[0065] Total length of ramp

[0066] The length of the ramp treads is l = L / n (the larger n is, the more hidden treads are supported; the larger l is, the more space is required to hide the treads).

[0067] like Figure 4 and Figure 5 As shown, assuming the ramp lifting height H0 > 750mm, if 5 < n ≤ 10, a rest platform needs to be set up.

[0068] Step B3 involves setting up two ramps and rest platforms. The first hidden folding pedal storage box is installed using the height difference of the first step; the location of the rest platform is determined through calculation, and the second folding pedal storage box is installed below it, with the length of each pedal section determined through calculation.

[0069] The horizontal length of the ramp L0 = n1(H0 / n) / α + L' + n2(H0 / n) / α;

[0070] Total length of ramp

[0071] First ramp step The length of the rest platform L' = 1500mm, and the second ramp tread (l2 is limited by the length of the rest platform L' and needs to be folded and hidden under the rest platform).

[0072] If 10 < n ≤ 15, two rest platforms need to be set up, then proceed to step C3;

[0073] The horizontal length of the ramp is L0 = n1(H0 / n) / α + L'1 + n2(H0 / n) / α + L'2 + n3(H0 / n) / α;

[0074] Total length of ramp

[0075] First ramp step The length of the first rest platform is L'1 = 1500mm, and the second ramp tread... The length of the second rest platform is L'2 = 1500mm, and the third ramp treads... (l2 is limited by the length L'1 of the first rest platform and needs to be folded and hidden under the first rest platform; l3 is limited by the length L'2 of the second rest platform and needs to be folded and hidden under the second rest platform).

[0076] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art through logical analysis, reasoning, or limited experimentation based on the concepts of the present invention and the prior art should be within the scope of protection defined by the claims.

Claims

1. A design method for a retractable, concealed wheelchair ramp, employing a computer to execute all steps; characterized in that, Includes the following steps: Step 1: Determine whether the number of steps n corresponding to the wheelchair ramp to be designed is less than or equal to 5; If the number of steps n≤5, then there is no need to set up a rest platform, and proceed to step A2; If the number of steps n > 5, then the rest platform needs to be set up, and step B2 should be executed; Step A2: Use the highest step as a storage box for the hidden folding pedals, calculate the horizontal length and total length of the wheelchair ramp to be designed, and the length of each pedal in the hidden folding pedals; Wherein, H0 is the height of the wheelchair ramp and its corresponding steps; Step B2: Determine whether the number of steps n is less than or equal to 10; If the number of steps n≤10, then a rest platform needs to be set up, and step B3 should be executed; If the number of steps n > 10, then two rest platforms need to be set up, and step C3 should be executed. Step B3: Using the highest step as the storage box for the first section of the hidden folding pedal, and the rest platform as the storage box for the second section of the hidden folding pedal, calculate the horizontal length L0 of the wheelchair ramp to be designed: L0 = n1(H0 / n) / α + L' + n2(H0 / n) / α. Total length The length of each of the hidden folding pedals described in the first paragraph and the length of each of the hidden folding pedals described in the second paragraph. Wherein, n1 is the number of steps corresponding to the hidden folding pedal in the first paragraph; n2 is the number of steps corresponding to the hidden folding pedal in the second paragraph; L' is the length of the rest platform, l2≤L'; α is the longitudinal slope; Step C3: Use the highest step as the storage box for the first section of the hidden folding pedal, and use the two rest platforms as storage boxes for the second and third sections of the hidden folding pedal, respectively. Calculate the horizontal length L0 of the wheelchair ramp to be designed: L0 = n1(H0 / n) / α + L'1 + n2(H0 / n) / α + L'2 + n3(H0 / n) / α. Total length and the length of each of the hidden folding pedals described in the first paragraph. The length of each of the hidden folding pedals described in the second paragraph The length of each of the hidden folding pedals described in the third paragraph Wherein, n1 is the number of steps corresponding to the hidden folding pedal in the first paragraph; n2 is the number of steps corresponding to the hidden folding pedal in the second paragraph; n3 is the number of steps corresponding to the hidden folding pedal in the third paragraph; L'1 is the length of the rest platform in the first paragraph, l2≤L'1; L'2 is the length of the rest platform in the second paragraph, l3≤L'2.

2. The design method for the retractable concealed wheelchair ramp according to claim 1, characterized in that, Each of the aforementioned rest platforms is at least 1500 mm long, and both ends are raised and lowered by jacks.

3. The design method for the retractable concealed wheelchair ramp according to claim 1, characterized in that, After any of the hidden folding pedals is unfolded, a jack is provided on the ground at the point where two adjacent pedals meet, and the pedals are supported by the lifting rods of the corresponding jacks.

4. The design method for the retractable concealed wheelchair ramp according to claim 1, characterized in that, Before performing step 1, the steps and the extended cross-sectional view of the wheelchair ramp to be designed are drawn using Tianzheng CAD software, and H0 and n are defined; the extension direction of the wheelchair ramp is considered to be free of obstacles.

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