BS EN 1335-3-2009 Office furniture — Office work chair Part 3 Test methods.pdf

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1、? ? ICS 13.180; 97.140 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? BS EN 1335-3:2009 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1335-3 April 2009 ICS 97.140Supersedes EN 1335-3:2000 English Version Office furniture - Office work chair - Part 3: Test methods Mobilier de bureau - S

2、iges 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 bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Sta

3、ndard 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 CEN Management Centre or to any CEN member. This European Standard exists in three official versions (English, Fren

4、ch, 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, Belgium, Bulgaria, Cyprus,

5、 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. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT

6、 EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1335-3:2009: E BS EN 1335-3:2009 EN 1335-3:2009 (E) 2 Contents Page F

7、oreword 3 1Scope 4 2Normative references 4 3Terms and definitions .4 4General test conditions .5 4.1Preliminary preparation 5 4.2Test equipment 5 4.3Application of forces .5 4.4Tolerances 6 4.5Sequence of testing .6 4.6Inspection and assessment of results 6 5Test apparatus .8 5.1Test surface 8 5.2St

8、ops .8 5.3Seat loading pad 8 5.4Smaller seat loading pad 8 5.5Local loading pad 9 5.6Back loading pad .9 5.7Arm rest durability test apparatus 10 5.8Strap . 10 5.9Stability loading device 10 5.10Loading discs 11 5.11Test surface for castor durability (and rolling resistance of the unloaded chair) .

9、11 6Loading points 11 6.1Loading point “A“ . 11 6.2Loading point “B“ . 11 6.3Loading point “C“ . 11 6.4Loading point “D“ . 11 6.5Loading point “E“ . 12 6.6Loading point “F“ 12 6.7Loading point “G“ . 12 6.8Loading point “H“ . 12 6.9Loading point “J“ 12 7Tests methods . 13 7.1Stability 13 7.2Static lo

10、ad tests 17 7.3Durability tests 19 7.4Rolling resistance of the unloaded chair . 21 8Test report . 21 Annex A (normative) Seat loading pad data 23 Annex B (normative) Stability loading device data 25 Annex C (informative) Loads, masses and cycles for functional tests 27 ? BS EN 1335-3:2009 EN 1335-3

11、:2009 (E) 3 Foreword 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 be given the status of a national standard, either by publication of an identical text or by endorsement, at t

12、he 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 document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any o

13、r 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 dimensions; EN 1335-2, Office furniture Office work chair Part 2: Safety requirements; EN 1335-3, Office furnit

14、ure 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 for the safety tests have been moved to EN 1335-2; c) Annex C includes loads and cycles for functional tests;

15、 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 Regulations, the national standards organizations of the following countries are bound to implement this Europe

16、an Standard: 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, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United K

17、ingdom. ? BS EN 1335-3:2009 EN 1335-3:2009 (E) 4 1 Scope This European Standard specifies mechanical test methods for determining the stability, strength and durability of office work chairs. This European Standard does not specify type approval tests for chair components. The tests are designed to

18、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, as well as misuse that might reasonably be expected to occur. The tests are designed to evaluate properties

19、 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 similar articles, it is important that the test specimen be representative of the production model. Tests ca

20、rried 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 1335-2 and additional loads, masses and cycles for functional tests can be found in Annex C (informative). Th

21、e 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 not included. The tests are not intended to assess the durability of upholstery, i.e. filling materials and

22、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 referenced documents are indispensable for the application of this document. For dated references, only the edit

23、ion 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 requirements 3 Terms and definitions For the purposes of this document, the following terms and definitions a

24、pply. 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 plane and can be adjusted in height NOTE Other adjustments may be included. 3.2 column office work chair compone

25、nt that connects the base and the seat structure NOTE A column normally incorporates a seat height adjustment and swivel mechanism. ? BS EN 1335-3:2009 EN 1335-3:2009 (E) 5 3.3 locking device device which inhibits the movement of the seat action and/or the back rest 3.4 arm rest length distance betw

26、een 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 highest point of the arm rest. 3.5 supporting point castor or glide 4 General test conditions 4.1 Preliminary

27、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 range of related chair models, only worst case(s) need to be tested. If mounting or assembly instructions a

28、re 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 must be changed to produce the worst case conditions, any re- tightening of the fittings shall be recorded

29、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 outside of the range of 15 C to 25 C, the maximum and/or minimum temperature shall be recorded in the test r

30、eport. 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 report. Before beginning the testing, visually inspect the unit thoroughly. Record any defects so that they a

31、re 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 results are dependent only upon correctly applied forces and not on the apparatus. The equipment shall not inhi

32、bit 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 shall be capable of pivoting in relation to the direction of the applied force. The pivot point shall be a

33、s 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 forces The forces in the static load tests shall be applied sufficiently slowly to ensure that negligible dynami

34、c force is applied. Each force shall be maintained for not less than 10 s and not more than 15 s. ? BS EN 1335-3:2009 EN 1335-3:2009 (E) 6 The forces in durability tests shall be applied at a rate to ensure that excessive heating does not occur. Each force shall be maintained for (2 1) s. The forces

35、 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 of the nominal dimension on soft surfaces 1 mm of the nominal dimension on all other surfaces Angles: 2 of

36、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 used for this purpose. 4.5 Sequence of testing All applicable tests shall be carried out on the same sample.

37、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 safety tests specified in EN 1335-2. 4.6 Inspection and assessment of results After completion of each tes

38、t, 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) deformation or wear of any part or component such that its function is impaired; d) loosening of any means of

39、 fixing components to the unit; e) changes that may affect stability. ? BS EN 1335-3:2009 EN 1335-3:2009 (E) 7 Table 1 Positioning of chair components Clause Test Seat height Seat Back rest in height Back rest in depth Tilt stiffness adjustment Castors and base Arm rest Foot rest 7.1.1 Front edge ov

40、erturning 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 highest position foremost position highest position foremost position maximum tension most likely to cause overt

41、urning 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 cause overturning most likely to cause overturning most likely to cause overturning 7.1.4 Sideways overtur

42、ning 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 with arm rests highest position foremost position highest position foremost position maximum tension most

43、 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 position minimum tension most likely to cause overturning most likely to cause overturning - 7.1.7 Rearward

44、s 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 overturning - 7.2.1 Seat front edge static load test highest position foremost position - - - - - - 7.2.2 Com

45、bined 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

46、load test front lowest position horizontal - - - - highest, foremost position - 7.2.5 Arm rest sideways static load test lowest position horizontal - - - - highest, widest position - 7.2.6 Foot rest static load test - - - - - least likely to cause overturning - highest position 7.3.1 Seat and back durability highest position horizontal highest position most likely to cause failure mid range 90 to the base

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