1、BRITISH STANDARD BS 4751:2005 Mobile sanitary chairs ICS 11.140 BS 4751:2005 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 22 March 2005 BSI 22 March 2005 First published August 1971 Second edition August 1984 Third edition 22 March 2005 Th
2、e following BSI references relate to the work on this British Standard: Committee reference CH/173/1 Draft for comment DC04/30080998 ISBN 0 580 45503 3 Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee CH/173, Technical sys
3、tems and aids for disabled or handicapped persons, to Subcommittee CH/173/1, Wheelchairs, upon which the following bodies were represented: Association of Transport Co-Ordination Officers Association of Spinal Injury Research, Rehabilitation and Re-integration (ASPIRE) British Healthcare Trades Asso
4、ciation (BHTA) British Polio Fellowship Castor Manufacturers (UK) Association Charted Society of Physiotherapy College of Occupational Therapists Community Transport Association UK Ltd Consumer Policy Committee of BSI Department of Transport EMPOWER Furniture Industry Research Association (FIRA) Ins
5、titute of Physics and Engineering in Medicine (IPEM) Mobility Products Association National Wheelchair Managers Forum Posture and Mobility Group for England and Wales Rehabilitation Engineering Service Managers Group Scottish Office Home and Health Department Tissue Viability Society Wheelchair Manu
6、facturers Association of Great Britain Co-opted members Amendments issued since last publication Amd No. Date CommentsBS 4751:2005 BSI 22 March 2005 i Contents page Foreword ii 1S c o p e 1 2 Normative references 1 3T e r m s a n d d e f i n i t i o n s 1 4 Design requirements 2 5 Performance requir
7、ements 4 6 Requirements for information to be supplied by the manufacturer 5 Annex A (normative) Test method for determination of brake lever operating forces 7 Annex B (normative) Test method for parking brake fatigue strength 9 Bibliography 11 Figure 1 Seat with optional front opening 3 Figure A.1
8、 Part of lever through which force is applied 8 Table 1 Dimensions of seats 3BS 4751:2005 ii BSI 22 March 2005 Foreword This British Standard has been prepared by Subcommittee CH/173/1. It supersedes BS 4751:1984, which is withdrawn. This new edition represents a full revision of the standard. The p
9、rincipal changes it introduces are to update design, performance and information requirements in line with current European and International Standards. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Complia
10、nce with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 11 and a back cover. The BSI copyright notice displayed in this document indicates when the document was la
11、st issued.BS 4751:2005 BSI 22 March 2005 1 1 Scope This British Standard specifies design and performance requirements and gives test methods for mobile sanitary chairs. It also gives requirements for user information and labelling. It is applicable to mobile sanitary chairs for use by children and
12、adults, including sanitary chairs that are intended to be used also as shower chairs, of both the type propelled by the user and the type propelled by an attendant. This British Standard does not apply to commode chairs. 2 Normative references The following referenced documents are indispensable for
13、 the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. BS 1254:1981, Specification for WC seats (plastics). BS 5504-1 (EN 34), Wall hung WC pan Part 1: Wall hun
14、g WC pan with close coupled cistern Connecting dimensions. BS 6937 (ISO 6440), Glossary of wheelchair terms. BS EN 33, Pedestal W.C. pans with close-coupled flushing cistern Connecting dimensions. BS EN 1021-1, Furniture Assessment of the ignitability of upholstered furniture Part 1: Ignition source
15、: smouldering cigarette. BS EN 1021-2, Furniture Assessment of the ignitability of upholstered furniture Part 2: Ignition source: match flame equivalent. BS EN 12182:1999, Technical aids for disabled persons General requirements and test methods. BS EN 12184, Electrically powered wheelchairs, scoote
16、rs and their chargers Requirements and test methods. BS EN ISO 14971, Medical devices Application of risk management to medical devices. BS ISO 7176-1:1999, Wheelchairs Part 1: Determination of static stability. BS ISO 7176-3:2003, Wheelchairs Part 3: Determination of effectiveness of brakes. BS ISO
17、 7176-8:1998, Wheelchairs Part 8: Requirements and test methods for static, impact and fatigue strengths. 3 Terms and definitions For the purposes of this British Standard, the terms and definitions given in BS 6937 and the following apply. 3.1 sanitary chair mobile structure, designed to fit over a
18、 conventional toilet and fitted with a WC seat NOTE A sanitary chair may have provision to accommodate a bedpan or similar receptacle, and may be designed for use in a shower. 3.2 footboard component of a sanitary chair that is permanently attached to the chair and is intended for the user to stand
19、on whilst entering or leaving the chair and to provide support for the users feet 3.3 footrest component of a sanitary chair that is intended to provide support for the users feet when seated, but not to act as a load-bearing component when the user enters or leaves the chair NOTE A footrest may be
20、detachable from the chair, and may be of either one-piece or multi-piece construction.BS 4751:2005 2 BSI 22 March 2005 4 Design requirements 4.1 General requirements NOTE 1 The design of the sanitary chair and its component parts should be such as to facilitate cleaning. If the chair is intended for
21、 use also as a shower chair, particular attention should be paid to the prevention of ingress of water into such areas as wheel bearings, castor swivels and tubular constructions. NOTE 2 If the design of the sanitary chair includes provision for accommodation under the seat of a bed pan or similar r
22、eceptacle it should be easily removable from the rear of the chair. The sanitary chair shall conform to the requirements specified in BS EN 12182 for: intended performance and technical documentation (BS EN 12182:1999, 4.2); clinical evaluation (BS EN 12182:1999, 4.3); aids that can be dismantled (B
23、S EN 12182:1999, 4.4); single use fasteners (BS EN 12182:1999, 4.5); biocompatibility and toxicity (BS EN 12182:1999, 5.2); contaminants and residues (BS EN 12182:1999, 5.3); infection and microbiological contamination (BS EN 12182:1999, 5.4); overflow, spillage, leakage and ingress of liquids (BS E
24、N 12182:1999, Clause 9); safety of moving parts (BS EN 12182:1999, Clause 12); prevention of traps for parts of human body (BS EN 12182:1999, Clause 13); folding and adjusting mechanisms (BS EN 12182:1999, Clause 14); surfaces, corners and edges (BS EN 12182:1999, Clause 18). A risk analysis shall b
25、e carried out in accordance with BS EN ISO 14971. 4.2 Overall dimensions The overall width of the sanitary chair shall not exceed 700 mm. The distance between the vertical plane of the front of the seat and the vertical plane of the front edge of the backrest shall not exceed 455 mm for sanitary cha
26、irs intended for adults and 450 mm for sanitary chairs intended for children. 4.3 Parking brakes The sanitary chair shall be fitted with a parking brake. The parking brake shall have provision for adjustment to compensate for any wear to any friction surfaces, tyres, castors etc. that have worn to t
27、he point of replacement as recommended in the manufacturers documentation. The parking brake shall meet the performance requirements specified in 5.1. 4.4 Seat NOTE Attention is drawn to the requirements for WC pans given in BS 5504-1, BS 5504-2 and BS EN 997, and to the guidance for design of housi
28、ng for the disabled given in BS 8300. The seat shall conform to the requirements for BS 1254:1981, type 1 or type 2, except that the dimensions shall conform to Figure 1 and Table 1 of the present standard. The seat shall be positioned horizontally in the chair in such a way as to allow location of
29、the seat over a WC pan of height 430 mm when the seat of the WC pan is raised.BS 4751:2005 BSI 22 March 2005 3 Table 1 Dimensions of seats 4.5 Footboards and footrests The sanitary chair shall be fitted with either a footboard or a footrest, which shall meet the performance requirements specified in
30、 5.2. NOTE 1 The framework of the chair, or the footboard or footrest, should minimize the risk of the users feet moving backwards behind the footboard or footrest. NOTE 2 The footboard or footrest should have a surface designed to minimize slipping of the users feet, especially if the chair is inte
31、nded for use also as a shower chair. If the footboard or footrest can be adjusted or moved from one position to another, provision shall be made to locate and lock it securely in any operating position. If the height of the footboard or footrest can be adjusted, it shall have increment adjustments n
32、ot exceeding 25 mm. If the sanitary chair is fitted with a separate footrest for each foot, the gap between the footrests shall not exceed: 35 mm for sanitary chairs intended for adults; 25 mm for sanitary chairs intended for children. NOTE 3 Means such as pivots, hinges or a sliding mechanism may b
33、e provided to enable the footboard or footrest to be retracted or moved out of the way without the need for removal, so as to facilitate entering or leaving the chair. Figure 1 Seat with optional front opening Dimensions in millimetres Dimensions a Description Measurement Min. Max. A Distance from r
34、ear edge of seat to front edge of seat (or theoretical point for open front as shown on Figure 1) 432 455 B b Length of opening at longest point or theoretical front as shown on Figure 1 255 285 C b Width of opening at widest point 215 240 D Distance from rear of seat to rear of opening 57 85 aSee F
35、igure 1. b Does not apply to sanitary chairs intended for use by children. D B A CBS 4751:2005 4 BSI 22 March 2005 4.6 Arm supports The sanitary chair shall be fitted with an arm support on each side. If the arm support can be adjusted or moved from one position to another, provision shall be made t
36、o locate and lock them securely in any operating position. Detachable arm supports shall have positive location and locking. NOTE Arm supports should be designed so as to minimize the risk of the user falling sideways from the chair. 4.7 Back support The sanitary chair shall be fitted with a back su
37、pport. The back support shall be fitted in such a way that the chair is suitable for use with a WC pan having a close-coupled cistern which conforms to the dimensions specified in BS 5504-1 or BS EN 33 as appropriate. NOTE This can necessitate the provision of a removable back. Removable backs shoul
38、d be incapable of being removed without the release of a positive locking device. If the back support can be adjusted or moved from one position to another, provision shall be made to locate and lock it securely in any operating position. 4.8 Castors The sanitary chair shall be fitted with castors.
39、The tyres of all castors shall be non-marking. 4.9 Pneumatic tyres If the sanitary chair is fitted with pneumatic tyres, they shall have identical valve connections. 4.10 Resistance to ignition 4.10.1 Upholstered composite parts For upholstered parts that are composites of cover and filling, with or
40、 without a support base or interliner: when the complete composite is tested in accordance with BS EN 1021-1 and BS EN 1021-2 with the ignition source applied centrally to the face that contacts the user, progressive smouldering ignition and flaming ignition as defined in these standards shall not o
41、ccur. 4.10.2 Foam materials For foam materials that form all or part of a seat, back support, positioning support, arm support or leg support that consist of foam material with or without an integral skin: when the material of each part is tested in accordance with BS EN 1021-1 and BS EN 1021-2 with
42、 the ignition source applied centrally to the face that contacts the user, progressive smouldering ignition and flaming ignition as defined in these standards shall not occur. 4.10.3 Other parts For seats and back supports, posture belts and harnesses, footrests, footboards and skirtguards: when the
43、 material of each item is tested in accordance with BS EN 1021-1 and BS EN 1021-2 with the ignition source applied centrally to the face that contacts or is nearest to the user, progressive smouldering ignition and flaming ignition as defined in these standards shall not occur. 5 Performance require
44、ments 5.1 Parking brakes 5.1.1 Performance When measured in accordance with Annex A: a) the mean value of the forces required to apply hand-operated brakes shall not exceed 60 N; b) the mean value of the forces required to apply foot push-operated brakes shall not exceed 100 N; c) the mean value of
45、the forces required to apply foot pull-operated brakes shall not exceed 60 N. When tested in accordance with BS ISO 7176-3:2003, 7.1, facing up and down a slope of 3 from the horizontal, the sanitary chair shall not slide or raise a wheel, the wheels shall not rotate and the castor assembly shall no
46、t rotate about its mounting axis.BS 4751:2005 BSI 22 March 2005 5 5.1.2 Fatigue strength When the parking brake is tested in accordance with Annex B, the brake-to-frame connections shall not have moved from their preset position following 60 000 brake operations. 5.2 Footboards and footrests When te
47、sted in accordance with BS ISO 7176-8: 1998, 9.6 with the test loading application repeated 1 825 times, at the end of the 1 825 cycles the footboard and sanitary chair shall meet the requirements specified in BS ISO 7176-8: 1998, 4.1. When tested in accordance with BS ISO 7176-8:1998, 9.6, the foot
48、rest shall meet the strength requirements specified in BS ISO 7176-8:1998, 4.1. 5.3 Manoeuvrability When propelled forwards by means of the hand rims or handle devices, with all buffering removed, the sanitary chair shall be capable of negotiating a turn through a door opening of 775 mm maximum widt
49、h into a corridor of 900 mm maximum width and vice versa and shall be capable of being turned through 180 in a corridor of 1 400 mm maximum width. 5.4 Stability on an inclined plane When tested in accordance with BS ISO 7176-1:1999, Clauses 9, 10, 11 and 12, the static stability of the sanitary chair shall be not less than 10 in all directions. 5.5 Strength of chair When tested in accordance with BS ISO 7176-8:1998, Clauses 8, 9 and
