GB/T 30661.13-2024 English PDFUS$284.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 30661.13-2024: Wheelchair seating - Part 13: Determination of the lateral stability property of a seat cushion Status: Valid
Basic dataStandard ID: GB/T 30661.13-2024 (GB/T30661.13-2024)Description (Translated English): Wheelchair seating - Part 13: Determination of the lateral stability property of a seat cushion Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: Y14 Classification of International Standard: 11.180.10 Word Count Estimation: 14,141 Date of Issue: 2024-09-29 Date of Implementation: 2025-01-01 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 30661.13-2024: Wheelchair seating - Part 13: Determination of the lateral stability property of a seat cushion---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. ICS 11.180.10 CCSY14 National Standard of the People's Republic of China Wheelchair seats. Part 13.Lateral seat cushions Determination of stability aseatcushion (ISO 16840-13.2021, IDT) Released on 2024-09-29 2025-01-01 Implementation State Administration for Market Regulation The National Standardization Administration issued Table of ContentsPreface III Introduction IV 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Abbreviations 2 5 Equipment 2 5.1 Hard seat cushion loading body 2 5.2 RCLI Overlay 2 5.3 Stability test bench 2 5.4 Tilt angle measuring device 3 6 Test Environment 3 7 Preparation and setting of the seat cushion 3 7.1 Seat Cushion Selection 3 7.2 Seat cushion pretreatment 3 8 Seat cushion lateral stability test method 4 8.1 Overview 4 8.2 Test Procedure 4 8.3 Calculation method 5 8.4 Inspection report 5 Appendix A (Informative) Method of using pressure distribution diagrams to characterize reaction force performance during stability tests 7 A.1 Overview 7 A.2 Equipment (pressure distribution measurement system) 7 A.3 Test procedure 7 References 8ForewordThis document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document is part 13 of GB/T (Z) 30661 “Wheelchair Seats”. GB/T (Z) 30661 has been published in the following parts. --- Part 1.Vocabulary, reference axis rules and measurement of body parts, body positions and body support surfaces; --- Part 2.Determination of the physical and mechanical properties of devices for maintaining tissue integrity; --- Part 3.Determination of static, impact and fatigue strength of body support devices; --- Part 4.Seat systems for use in motor vehicles; --- Part 6.Simulated use and determination of changes in seat cushion performance; --- Part 13.Determination of lateral stability of seat cushions. This document is equivalent to ISO 16840-13.2021 "Wheelchair seats - Part 13.Determination of lateral stability of seat cushions". Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document is issued by the Ministry of Civil Affairs of the People's Republic of China. This document is under the jurisdiction of the National Technical Committee for Standardization of Rehabilitation and Special Equipment for Persons with Disabilities (SAC/TC148). This document was drafted by. National Rehabilitation Assistive Devices Research Center, National Rehabilitation Assistive Devices Research Center Rehabilitation Assistive Devices Quality Supervision and Inspection Center, Shenzhen SASAC Technology Co., Ltd. and Shanghai Hubang Intelligent Rehabilitation Equipment Co., Ltd. The main drafters of this document are Gu Huiru, Zhang Weikang, Yun Xiao, Peng Shuiping and Zhao Cishun.IntroductionWheelchair Seats is a standard that ensures the performance and quality of wheelchair seats and accurately provides these performance and quality to stakeholders. The users of chairs and vehicles want to know the performance and quality of the products, the manufacturers want to know how to achieve better quality, and the inspection agencies want to know how to achieve better quality. Know how to inspect the product. Because the Wheelchair Seat is too long, and the parties using the document generally only need part of it. The content is too complex and the updates of each part will not be synchronized, so it is compiled in parts and is intended to consist of the following parts. --- Part 1.Vocabulary, reference axis rules and measurement of body parts, body positions and body support surfaces; --- Part 2.Determination of the physical and mechanical properties of devices for maintaining tissue integrity; --- Part 3.Determination of static, impact and fatigue strength of body support devices; --- Part 4.Seat systems for use in motor vehicles; --- Part 6.Simulated use and determination of changes in seat cushion performance; --- Part 9.Guidelines for seat interface pressure distribution; --- Part 10.Flame retardancy requirements and test methods for body support devices; --- Part 11.Determination of perspiration dissipation characteristics of seat cushions; --- Part 12.Testing the wrapping and sinking characteristics of seat cushions using a double hemisphere loader; --- Part 13.Determination of lateral stability of seat cushions; --- Part 14.Concepts related to the control of external forces to maintain tissue integrity; --- Part 15.Selection, placement and fixing of flexible body support devices in seats. Part 1 and Part 14 are definitions of terms, Part 2, Part 3, Part 10 and Part 12 are wheelchair seat cushions. Part 6, Part 11 and Part 13 are mainly about the test methods for seat performance, and Part 4 is about special Intended use requirements, Part 9 provides assessment information, and Part 15 is about flexible body support devices. The seat cushion serves as a support base for wheelchair occupants and affects posture stability by resisting the moment when the occupant's center of gravity moves. There is limited research on the effects of seat cushion design and configuration on pelvic orientation and measures of postural stability. Test methods are used to characterize the tissue integrity management properties of wheelchair cushions, such as immersion, wrapping, hysteresis, impact damping, recovery, and level Stiffness, etc. This document provides details of the test apparatus and a method for measuring the ability of a seat cushion to resist movements that would cause the pelvis to tilt. The change in pelvic tilt caused by the shift in the center of gravity of the human body can affect its stability and mobility, depending on the response of the seat cushion, the occupant's Core muscle strength, etc. The torque in the test method is achieved by moving a horizontal displacement of the upper surface of the standard hard seat cushion loading body (RCLI) The purpose of the test method described in this document is to differentiate between seat cushions with respect to lateral stability. It is not suitable for grading seat cushions or directly matching the characteristics to the requirements of individual occupants. This document will be further developed as evidence of clinical relevance becomes available. Conditions (e.g., RCLI) simulate symmetrical anatomy. The loads used in this document are based on the 40th to 60th percentile of wheelchair occupants. The weight of the sub-position is not used to characterize any cushioning characteristics under heavy load conditions or to evaluate the load-bearing capacity of the cushion. There are other stability issues related to occupants that are not addressed in this document. For example, due to the occupant's thighs, calves and feet The position of the seat cushion will offset any instability in the seat cushion, so the fore-aft stability test is of little significance to the occupant and is not included. The document also does not address aspects of wheelchair sitting stability that are related to the resistance or assistance provided by the seat cushion to the occupant, such as The situation in which an occupant regains a neutral pelvis after a lateral tilt in the frontal plane. In some cases, an occupant will benefit from a raised seat cushion edge. Provide stability (i.e., when the occupant sits on the seat cushion, the reinforced edge may help support the required functional posture). In a lower position, riders may prefer less stability at the edge to help them transfer on the seat cushion. Wheelchair seats. Part 13.Lateral seat cushions Determination of stability1 ScopeThis document specifies equipment, test instruments and methods for determining the lateral stability of a wheelchair seat cushion by measuring the response of the seat cushion to a shift in the centre of gravity of a load placed on the cushion. It provides a method for determining specific physical and mechanical property changes in seat cushions. It is not intended for specific individual users. Provides information on specific cushioning performance. It does not provide information related to fore-aft stability, nor does it provide information on the stability effect with the edge of the seat cushion. Related information. NOTE 1 The test conditions simulate symmetrical anatomical structures. NOTE 2 The loads are intended to represent the loads carried below the pelvis by the 40th to 60th percentile of wheelchair users. This document applies to seat cushions used in situations other than wheelchairs.2 Normative referencesThe contents of the following documents constitute essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. ISO 7176-26 Wheelchairs-Part 26.Vocabulary Note. GB/T 18029.26-2014 Wheelchairs Part 26.Terminology (ISO 7176-26.2007, IDT) ISO 16840-2.2018 Wheelchair seats - Part 2.Determination of physical and mechanical properties of devices for maintaining tissue integrity - Seat cushions Note. GB/T 30661.2-2014 Wheelchair seats Part 2.Determination of physical and mechanical properties of devices for maintaining tissue integrity Seat cushions (ISO 16840- 2.2007,IDT)3 Terms and definitionsFor the purposes of this document, the terms and definitions defined in ISO 16840-2.2018 and ISO 7176-26 and the following apply. 3.1 The seat cushion has the ability to prevent the pelvis from tilting in the frontal plane due to the lateral shift of the passenger's center of gravity. 3.2 A device applied to the test seat that can be translated in a horizontal plane during the test so that the center of gravity of the load moves relative to the test seat gross weight. Note. Numbers 4 to 6 in Figure 1 are examples of live loads. 3.3 The total weight of the equipment applied to the test cushion which will not move in the horizontal plane relative to the test cushion during the test ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 30661.13-2024_English be delivered?Answer: Upon your order, we will start to translate GB/T 30661.13-2024_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 30661.13-2024_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 30661.13-2024_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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