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1、a Date: 29 May 2007 Origin: European Latest date for receipt of comments: 31 August 2007 Project no.: 2007/00716 Responsible committee: FW/0 Furniture Interested committees: Title: Draft BS EN 1335-2 REV Office furniture - Office work chair Part 2: Safety requirements Supersession information: If th
2、is document is published as a standard, the UK implementation of it will supersede BSEN1335-2 : 2000 and partially supersede. NONE If you are aware of a current national standard which may be affected, please notify the secretary (contact details below). WARNING: THIS IS A DRAFT AND MUST NOT BE REGA
3、RDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 31 August 2007. This draft is issued to allow comments from interested parties; all comments will be given consideration prior to publication. No acknowledgement will normally be sent. See overleaf for information on commenting. No
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6、ish Standards Publishing Sales Limited. Tel: 01344 404409 or email bsonlinetechindex.co.uk. Information on the co-operating organizations represented on the committees referenced above may be obtained from the responsible committee secretary. Cross-references The British Standards which implement In
7、ternational or European publications referred to in this draft may be found via the British Standards Online Service on the BSI web site http:/www.bsi-. Direct tel: 0208 996 7427 Responsible Committee Secretary: Ms C Langdon (BSI) E-mail: caroline.langdonbsi- Draft for Public Comment Head Office 389
8、 Chiswick High Road London W4 4AL Telephone: +44(0)20 8996 9000 Fax: +44(0)20 8996 7001 Form 36 Version 7.0 DPC: 07/30163945 DC Licensed Copy: London South Bank University, London South Bank University, Sun Jun 17 07:20:46 GMT+00:00 2007, Uncontrolled Copy, (c) BSI b Introduction This draft standard
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17、ondon South Bank University, London South Bank University, Sun Jun 17 07:20:46 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM DRAFT prEN 1335-2 May 2007 ICS 97.140Will supersede EN 1335-2:2000 English Version Office furniture - Office work chair - Part 2
18、: Safety requirements Mobilier de bureau - Siges de travail de bureau - Partie 2: Exigences de scurit Brombel - Bro-Arbeitsstuhl - Teil 2: Sicherheitsanforderungen This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 207. If thi
19、s draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. This draft European Standard was established by CEN in three offic
20、ial versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria,
21、 Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Recipients of thi
22、s draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to provide supporting documentation. Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and sh
23、all not be referred to as a European Standard. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2007 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN nation
24、al Members. Ref. No. prEN 1335-2:2007: E Licensed Copy: London South Bank University, London South Bank University, Sun Jun 17 07:20:46 GMT+00:00 2007, Uncontrolled Copy, (c) BSI prEN 1335-2:2007 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normative references4 3 Terms and definitions .4 4 Safety requ
25、irements 4 4.1 General design requirements.4 4.1.1 Corners and edges, trapping, pinching and shearing.4 4.1.2 Adjusting devices5 4.1.3 Connections.5 4.1.4 Avoidance of soiling5 4.2 Test sequence5 4.3 Stability during use6 4.4 Rolling resistance of the unloaded chair 6 4.5 Strength and durability .6
26、5 Information for use7 Annex A (normative) Safety requirements .8 Licensed Copy: London South Bank University, London South Bank University, Sun Jun 17 07:20:46 GMT+00:00 2007, Uncontrolled Copy, (c) BSI prEN 1335-2:2007 (E) 3 Foreword This document (prEN 1335-2:2007) has been prepared by Technical
27、Committee CEN/TC 207 “Furniture”, the secretariat of which is held by UNI. This document is currently submitted to the CEN Enquiry. This document will supersede EN 1335-2:2000. This series consist of following parts: EN 1335-1, Office furniture Office work chair Part 1: Dimensions, determination of
28、dimensions; EN 1335-2, Office furniture Office work chair Part 2: Safety requirements; EN 1335-3, Office furniture Office work chair Part 3: Test methods. European experts decided in 2006 to review the EN 1335-series, taking into account the present state of the art. It was decided to revise EN 1335
29、-3:2000 in line with ISO/FDIS 21015:2007, Office furniture Office work chairs Test methods for the determination of stability, strength and durability, which has been prepared by ISO/TC 136 “Furniture“. Additionally it was decided to revise EN 1335-2:2000 according to the new EN 1335- 3:2007. This p
30、art of prEN 1335 specifies the safety requirements for office work chairs which have to be tested according to prEN 1335-3. The former EN 1335-2:2000 was based and related to the former EN 1335-3:2000. Taking into account that the present prEN 1335-3:2007 is based on ISO/FDIS 21015:2007 some test me
31、thods are no longer included. Therefore these safety requirements had to be deleted in prEN 1335-2:2007. Technical experts in Europe are recommended to compare the safety requirements and the corresponding test methods in prEN 1335-2:2007 and prEN 1335-3:2007 and to submit appropriate comments durin
32、g CEN Enquiry, especially leaning against back rest (compare EN 1335-3:2000, 5.4.1 with prEN 1335-3:2007 and prEN 1335- 2:2007, 4.3); rolling resistance of the unloaded chair (compare EN 1335-3:2000, 6.1 with prEN 1335-2:2007, 4.4); strength and durability (compare EN 1335-3:2000, 5.3.2, 8 and 9.2.1
33、. with prEN 1335-3:2007 and prEN 1335-2:2007, 4.5). Licensed Copy: London South Bank University, London South Bank University, Sun Jun 17 07:20:46 GMT+00:00 2007, Uncontrolled Copy, (c) BSI prEN 1335-2:2007 (E) 4 1 Scope This part of EN 1335 specifies the safety requirements for office work chairs.
34、2 Normative references The following referenced documents are indispensable for 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. EN 1335-1:2000, Office fur
35、niture Office work chair Part 1: Dimensions, determination of dimensions prEN 1335-3:2007, Office furniture Office work chair Part 3: Test methods 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 castor Type H castor with rigid wheels, i.e. ha
36、rd tread NOTE 1 The wheel is of one colour over the entire surface. NOTE 2 These castors are suitable for carpeted floors. 3.2 castor Type W castor with resilient tired wheels, i.e. soft tread NOTE 1 The colour is clearly different to the wheel centre. NOTE 2 These castors are suitable for hard ston
37、e, wooden or tiled floors or those featuring non-textiled covering. 4 Safety requirements 4.1 General design requirements 4.1.1 Corners and edges, trapping, pinching and shearing The chair shall be so designed as to minimise the risk of injury to the user. All parts of the chair with which the user
38、comes into contact, during intended use, shall be so designed that physical injury and damage to property are avoided. These requirements are met when: the safety distance of accessible movable parts is either 8 mm or 25 mm in any position during movement; accessible corners are rounded with minimum
39、 2 mm radius; Licensed Copy: London South Bank University, London South Bank University, Sun Jun 17 07:20:46 GMT+00:00 2007, Uncontrolled Copy, (c) BSI prEN 1335-2:2007 (E) 5 the edges of the seat, back rest and arm rests which are in contact with the user when sitting in the chair are rounded with
40、minimum 2 mm radius; the edges of handles are rounded with minimum 2 mm radius in the direction of the force applied; all other edges are free from burrs and rounded or chamfered; the ends of hollow components are closed or capped. 4.1.2 Adjusting devices Movable and adjustable parts shall be design
41、ed so that injuries and inadvertent operation are avoided. It shall be possible to operate the adjusting devices from sitting position in the chair. 4.1.3 Connections It shall not be possible for any load bearing part of the chair to come loose unintentionally. 4.1.4 Avoidance of soiling All parts w
42、hich are lubricated to assist sliding (greasing, lubricating, etc.) shall be designed to protect users from lubricant stains when in normal use. 4.2 Test sequence The chair shall be tested in the following sequence of tests of EN 1335-3. stability tests (optional); test of rolling resistance (option
43、al); tests of seat and back rest; additional test of rotatable back rest; fatigue test of arm rests; static load test of arm rests (functional load); stability tests (before testing the sideways overbalancing for chairs with arm rests, the arm rests shall be allowed to recover for up to 4 h); static
44、 load test of arm rests (overload); test of rolling resistance. Licensed Copy: London South Bank University, London South Bank University, Sun Jun 17 07:20:46 GMT+00:00 2007, Uncontrolled Copy, (c) BSI prEN 1335-2:2007 (E) 6 4.3 Stability during use The chair shall not overbalance under the followin
45、g conditions: a) by pressing down on the front edge of the seat surface in the most adverse position; b) by leaning out over the arm rests; c) by leaning against the back rest; d) by sitting on the front edge. The first requirement is fulfilled if the chair does not overbalance when tested according
46、 to 7.1.1 of prEN 1335- 3:2007 with the forces and numbers of cycles according to Table A1. The second and fourth requirement are fulfilled if the chair does not overbalance when tested according to 7.1.2, 7.1.4 and 7.1.5 of prEN 1335-3:2007 with the forces and numbers of cycles according to Table A
47、1. The third requirement is fulfilled if the chair does not overbalance when tested according to 7.1.6 or 7.1.7 of prEN 1335-3:2007 with the forces and numbers of cycles according to table A1. 4.4 Rolling resistance of the unloaded chair The unloaded chair shall not roll unintentionally. This requir
48、ement is met when the castors are of identical construction. 4.5 Strength and durability The chair shall be constructed to ensure that it does not create a risk of injury to the user of the chair under the following conditions: a) sitting on the seat, both centrally and off-centre; b) moving forward
49、, backwards, and sideways while sitting in the chair; c) leaning over the arm rests; d) pressing down on the arm rests while getting up from the chair. These requirements are fulfilled when after the tests specified in 7.3.1 and 7.3.2 of prEN 1335-3:2007 with the forces and numbers of cycles according to Table A2: there are no fractures of any member, joint or component, there is no loosening o