1、August 2009DEUTSCHE NORM English price group 15No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 97.140!$Y=g“1542668www.
2、din.deDDIN EN 1335-3Office furniture Office work chair Part 3: Test methodsEnglish version of DIN EN 1335-3:2009-08Brombel Bro-Arbeitsstuhl Teil 3: PrfverfahrenEnglische Fassung DIN EN 1335-3:2009-08SupersedesDIN EN 1335-3:2002-08www.beuth.deDocument comprises 28 pagesDIN EN 1335-3:2009-08 National
3、foreword This standard has been prepared by Technical Committee CEN/TC 207 “Furniture”, (Secretariat: UNI, Italy). The responsible German body involved in its preparation was the Normenausschuss Holzwirtschaft und Mbel (Timber and Furniture Standards Committee), Technical Committee NA 042-05-19 AA B
4、rombel. Amendments This standard differs from DIN EN 1335.3:2002-08 as follows: a) ISO 21015:2007 has been adopted as far as possible. b) Loads and cycles for the safety tests have been moved to EN 1335-2. c) Annex C includes loads and cycles for functional tests. d) The seat and back durability tes
5、t procedures have been significantly changed. e) The determination of the maximum offset of the backrest has been deleted. Previous editions DIN 4551: 1973-09, 1975-10, 1988-06 DIN 4552: 1975-10 DIN EN 1335-3: 2002-08 2 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1335-3 April 2009 ICS 97.14
6、0 Supersedes EN 1335-3:2000 English Version Office furniture Office work chair Part 3: Test methods Mobilier de bureau Siges de travail de bureau Partie 3: Mthodes dessai Brombel Bro-Arbeitsstuhl Teil 3: Prfverfahren This European Standard was approved by CEN on 28 February 2009. CEN members are bou
7、nd 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. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the C
8、EN Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same stat
9、us as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,
10、 Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reserved worl
11、dwide for CEN national Members. Ref. No. EN 1335-3:2009: EContents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 General test conditions .5 4.1 Preliminary preparation 5 4.2 Test equipment 5 4.3 Application of forces .5 4.4 Tolerances 6 4.5 Sequence of testing .6 4.
12、6 Inspection and assessment of results 6 5 Test apparatus .8 5.1 Test surface 8 5.2 Stops .8 5.3 Seat loading pad 8 5.4 Smaller seat loading pad 8 5.5 Local loading pad 9 5.6 Back loading pad .9 5.7 Arm rest durability test apparatus 10 5.8 Strap . 10 5.9 Stability loading device 10 5.10 Loading dis
13、cs 11 5.11 Test surface for castor durability (and rolling resistance of the unloaded chair) . 11 6 Loading points 11 6.1 Loading point “A“ . 11 6.2 Loading point “B“ . 11 6.3 Loading point “C“ . 11 6.4 Loading point “D“ . 11 6.5 Loading point “E“ . 12 6.6 Loading point “F“ 12 6.7 Loading point “G“
14、. 12 6.8 Loading point “H“ . 12 6.9 Loading point “J“ 12 7 Tests methods . 13 7.1 Stability 13 7.2 Static load tests 17 7.3 Durability tests 19 7.4 Rolling resistance of the unloaded chair . 21 8 Test report . 21 Annex A (normative) Seat loading pad data 23 Annex B (normative) Stability loading devi
15、ce data 25 Annex C (informative) Loads, masses and cycles for functional tests 27 DIN EN 1335-3:2009-08 EN 1335-3:2009 (E)2Foreword This document (EN 1335-3:2009) has been prepared by Technical Committee CEN/TC 207 “Furnitures”, the secretariat of which is held by UNI. This European Standard shall b
16、e given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by October 2009, and conflicting national standards shall be withdrawn at the latest by October 2009. Attention is drawn to the possibility that some of the elements of this documen
17、t may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 1335-3:2000. This series consist of following parts: EN 1335-1, Office furniture Office work chair Part 1: Dimensions Determination of di
18、mensions; EN 1335-2, Office furniture Office work chair Part 2: Safety requirements; EN 1335-3, Office furniture Office work chair Part 3: Test methods. The main changes with respect to the previous edition are listed below: a) ISO 21015:2007 has been adopted as far as possible; b) loads and cycles
19、for the safety tests have been moved to EN 1335-2; c) Annex C includes loads and cycles for functional tests; d) seat and back durability test procedures have been significantly changed; e) determination of the maximum offset of the backrest has been deleted. According to the CEN/CENELEC Internal Re
20、gulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Ne
21、therlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 1335-3:2009-08 EN 1335-3:2009 (E)31 Scope This European Standard specifies mechanical test methods for determining the stability, strength and durability of office work chairs.
22、 This European Standard does not specify type approval tests for chair components. The tests are designed to be applied to an article of furniture that is fully assembled and ready for use. The tests consist of the application, to various parts of the item, of forces simulating normal functional use
23、, as well as misuse that might reasonably be expected to occur. The tests are designed to evaluate properties without regard to materials, design/construction or manufacturing processes. The test results are only valid for the article tested. When the test results are intended to be applied to other
24、 similar articles, it is important that the test specimen be representative of the production model. Tests carried out according to this standard are intended to demonstrate the ability of the item to give satisfactory service in its intended environment. The safety requirements are specified in EN
25、1335-2 and additional loads, masses and cycles for functional tests can be found in Annex C (informative). The tests have been developed for units/components that have not been in use. However, when properly justified, they may be used for fault investigation. Assessment of ageing and degradation is
26、 not included. The tests are not intended to assess the durability of upholstery, i.e. filling materials and covers. Data are given for the design of seat-loading pads in Annex A (normative) and for the design of stability-loading pad in Annex B (normative). 2 Normative references The following refe
27、renced 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 1335-2:2009, Office furniture Office work chair Part 2: Safety r
28、equirements 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 office work chair piece of seating furniture for one person, with a back rest, with or without arm rests, whose upper part, which includes the seat, can rotate in the horizontal plan
29、e and can be adjusted in height NOTE Other adjustments may be included. 3.2 column office work chair component that connects the base and the seat structure NOTE A column normally incorporates a seat height adjustment and swivel mechanism. DIN EN 1335-3:2009-08 EN 1335-3:2009 (E)43.3 locking device
30、device which inhibits the movement of the seat action and/or the back rest 3.4 arm rest length distance between vertical lines through its front and rear edges NOTE In the case of an arm rest, which is not horizontal or which is curved, the length is measured in a horizontal plane 20 mm below the hi
31、ghest point of the arm rest. 3.5 supporting point castor or glide 4 General test conditions 4.1 Preliminary preparation The unit shall be assembled and/or configured according to the instructions supplied with it. The most adverse configuration shall be used for each test, see Table 1. For testing a
32、 range of related chair models, only worst case(s) need to be tested. If mounting or assembly instructions are not supplied, the mounting or assembly method shall be recorded in the test report. Fittings shall not be re-tightened unless specifically required by the manufacturer. If the configuration
33、 must be changed to produce the worst case conditions, any re-tightening of the fittings shall be recorded in the test report. Unless otherwise stated all tests shall be carried out on the same sample. The tests shall be carried out in indoor ambient conditions. If during a test the temperature is o
34、utside of the range of 15 C to 25 C, the maximum and/or minimum temperature shall be recorded in the test report. In the case of designs not addressed in the test procedures, the test shall be carried out as far as possible as described, and deviations from the test procedure recorded in the test re
35、port. Before beginning the testing, visually inspect the unit thoroughly. Record any defects so that they are not assumed to have been caused by the tests. Carry out measurements if specified. 4.2 Test equipment Unless otherwise specified, the tests may be applied by any suitable device because resu
36、lts are dependent only upon correctly applied forces and not on the apparatus. The equipment shall not inhibit deformation nor cause unnatural deformation of the unit/component, i.e. it shall be able to move so that it can follow the deformation of the unit/component during testing. All loading pads
37、 shall be capable of pivoting in relation to the direction of the applied force. The pivot point shall be as close as practically possible to the load surface. If a loading pad tends to slide use a slip resistant material between the loading pad and the surface being tested. 4.3 Application of force
38、s The forces in the static load tests shall be applied sufficiently slowly to ensure that negligible dynamic force is applied. Each force shall be maintained for not less than 10 s and not more than 15 s. DIN EN 1335-3:2009-08 EN 1335-3:2009 (E)5The forces in durability tests shall be applied at a r
39、ate to ensure that excessive heating does not occur. Each force shall be maintained for (2 1) s. The forces may be applied using masses. 4.4 Tolerances Unless otherwise stated, the following tolerances are applicable: Forces: 5 % of the nominal force Masses: 1 % of the nominal mass Dimensions: 5 mm
40、of the nominal dimension on soft surfaces 1 mm of the nominal dimension on all other surfaces Angles: 2 of the nominal angle The accuracy for the positioning of loading pads shall be 5 mm. The tests specify the application of forces. Masses may, however, be used. The relation 10 N for 1 kg may be us
41、ed for this purpose. 4.5 Sequence of testing All applicable tests shall be carried out on the same sample. The sequence of the safety tests shall be as specified in EN 1335-2:2009, 4.2. If functional tests shall be carried out, this shall be done in the sequence of Table C.1 after completing all the
42、 safety tests specified in EN 1335-2. 4.6 Inspection and assessment of results After completion of each test, inspect the unit again. Record any changes including: a) fracture of any component or joint; b) loosening of any joint intended to be rigid, which can be demonstrated by hand pressure; c) de
43、formation or wear of any part or component such that its function is impaired; d) loosening of any means of fixing components to the unit; e) changes that may affect stability. DIN EN 1335-3:2009-08 EN 1335-3:2009 (E)6Table 1 Positioning of chair components Clause Test Seat height Seat Back restin h
44、eight Back rest in depth Tilt stiffness adjustment Castors and base Arm rest Foot rest 7.1.1 Front edge overturning highest position foremost position highest position foremost position maximum tension most likely to cause overturning most likely to cause overturning 7.1.2 Forward overturning highes
45、t position foremost position highest position foremost position maximum tension most likely to cause overturning most likely to cause overturning - 7.1.3 forward overturning for chairs with foot rest highest position foremost position lowest position foremost position maximum tension most likely to
46、cause overturning most likely to cause overturning most likely to cause overturning7.1.4 Sideways overturning for chairs without arm rests highest position foremost position highest position foremost position maximum tension most likely to cause overturning - - 7.1.5 Sideways overturning for chairs
47、with arm rests highest position foremost position highest position foremost position maximum tension most likely to cause overturning most likely to cause overturning - 7.1.6 Rearwards overturning of chairs without back rest inclination highest position rearmost position highest position rearmost po
48、sition minimum tension most likely to cause overturning most likely to cause overturning - 7.1.7 Rearwards overturning of chairs with back rest inclination highest position rearmost position highest position rearmost position minimum tension most likely to cause overturning most likely to cause over
49、turning - 7.2.1 Seat front edge static load test highest position foremost position - - - - - - 7.2.2 Combined seat and back static load highest position most adverse position highest position rearmost position mid range least likely to cause overturning - - 7.2.3 Arm rest downward static load test central lowest position horizontal - - - - most likely to cause failure - 7.2.4 Arm rest downward static load test front lowest position horizontal - - - - highest,
