BS EN 14074-2004 Office furniture - Tables and desks and storage furniture - Test methods for the determination of strength and durability of moving parts《办公家具 桌子和储存用家具 可动部件的强度和耐用性.pdf

1、BRITISH STANDARD BS EN 14074:2004 Office furniture Tables and desks and storage furniture Test methods for the determination of strength and durability of moving parts The European Standard EN 14074:2004 has the status of a British Standard ICS 97.140 BS EN 14074:2004 This British Standard was publi

2、shed under the authority of the Standards Policy and Strategy Committee on 8 November 2004 BSI 8 November 2004 ISBN 0 580 44738 3 National foreword This British Standard is the official English language version of EN 14074:2004. The UK participation in its preparation was entrusted to Technical Comm

3、ittee FW/0, Furniture, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BS

4、I Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for

5、its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK inter

6、ests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 20, an inside back cover and a back cover. The BSI copyright notice displayed in this doc

7、ument indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN14074 August2004 ICS97.140 Englishversion OfficefurnitureTablesanddesksandstoragefurnitureTest methodsforthedeterminationofstrengthanddurabili

8、tyof movingparts MobilierdebureauTablesdetravaildebureauetmeubles derangementMthodesdessaipourladterminationde larsistanceetdeladurabilitdespartiesmobiles BrombelBroArbeitstischeundBroschrnke PrfverfahrenfrdieBestimmungderFestigkeitundder DauerhaltbarkeitbeweglicherTeile ThisEuropeanStandardwasappro

9、vedbyCENon27May2004. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCent

10、ralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationa

11、lstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION C

12、OMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN14074:2004:EEN 14074:2004 (E) 2 Contents page Foreword3 1 Scope 4 2 Normative references 4 3 Te

13、rms and definitions .4 4 General test conditions.4 4.1 Preliminary preparation 4 4.2 Test equipment 5 4.3 Tolerances 5 4.4 Sequence of testing.5 5 Test apparatus .6 5.1 Obstacles for rolling test 6 5.2 Floor surface 6 5.3 Wall Surface .6 5.4 Stops .6 5.5 Masses 6 5.6 Glass marbles 6 5.7 Loading pad6

14、 5.8 Apparatus for slam open/shut of extension elements.6 6 Test methods7 6.1 Determination of loading of storage parts 7 6.2 Extension elements .7 6.2.1 Strength of extension elements .7 6.2.2 Durability test of extension elements8 6.2.3 Slam open of extension elements9 6.2.4 Interlock test.9 6.3 H

15、inged or pivoted doors .9 6.3.1 Vertical load on doors .9 6.3.2 Horizontal static force on open door.10 6.3.3 Durability test on hinged and pivoted doors 11 6.4 Sliding doors and horizontal roll fronts 12 6.4.1 Durability test of sliding doors and horizontal roll fronts .12 6.4.2 Slam shut/open of s

16、liding doors and horizontal roll fronts 13 6.5 Vertical roll fronts 14 6.5.1 Durability of vertical roll front 14 6.6 Flaps14 6.6.1 Strength of flaps 14 6.6.2 Durability of flaps.15 6.7 Rolling test for mobile filing pedestals15 7 Test report 16 Annex A (informative) Apparatus for slam open and shut

17、 test of extension elements .17 A.1 Slam open test with pneumatic actuator.17 A.1.1 Principle17 A.1.2 Apparatus .17 A.1.3 Calibration 17 A.2 Slam open test with weight and string 19 A.2.1 Slam open test .19 Bibliography 20 EN 14074:2004 (E) 3 Foreword This document (EN 14074:2004) has been prepared

18、by Technical Committee CEN/TC 207 “Furniture”, 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 the latest by February 2005, and conflicting national standards shall be w

19、ithdrawn at the latest by February 2005. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard : Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hu

20、ngary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 14074:2004 (E) 4 1 Scope This document specifies test methods for the determination of strength and durability of moving

21、parts of desks, tables and storage furniture. This document does not apply to high density mechanized filing systems, rotary filing systems or plan files. The tests are intended to simulate normal functional use, as well as misuse that might reasonably be expected to occur. Safety requirements can b

22、e found in EN 14073-2. Assessment of ageing is not included. 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 (

23、including any amendments) applies. Not applicable no normative references in this document. 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 catch device device, which keeps or pulls a component in place, but does not require a second action i

24、n order to release it, e.g. a magnetic catch or a self-closing-mechanism 3.2 locking mechanism mechanism that limits access to the interior of a unit or a storage element. It requires a key or a combination in order to operate it or to make it possible to operate it. 4 General test conditions 4.1 Pr

25、eliminary preparation The tests specified in this Standard are designed to be applied to an item of furniture that is fully assembled and ready for use. The tests refer to furniture parts with conventional functions. Combination of tests may be necessary to cover the properties of multi-function par

26、ts, e.g. a shelf that can be pulled out on runners shall be tested for strength of shelf supports as well as for strength as an extension element. Before any of the tests are commenced, the item shall be old enough to ensure that it has developed its full strength. EN 14074:2004 (E) 5 The furniture

27、shall be tested as delivered. Ready to Assemble furniture shall be assembled according to the instructions supplied with it. If the furniture can be assembled or combined in different ways, the most adverse combination shall be used for each test. This is also applicable to units that can be combine

28、d with other units or components. Wall or screen mounted units shall be installed according to the manufacturers instructions. Free standing units shall be placed on the floor surface (5.2) with stops (5.4) around each leg or base. The tests shall be carried out in indoor ambient conditions but, if

29、during a test, the atmosphere temperature is outside the range 15 C to 25 C, the maximum and/or minimum temperature shall be recorded in the test report. Tighten any assembly fittings before testing. Further re-tightening shall not take place unless it is specifically required by the manufacturer. 4

30、.2 Test equipment The forces in the static load tests shall be applied sufficiently slowly to ensure that the influence of dynamic load is negligible. Unless otherwise stated, the static loads shall be maintained for (10 2)s. The forces in durability tests shall be applied sufficiently slowly to ens

31、ure that heating does not occur. Unless otherwise stated, the durability loads shall be maintained for (2 1)s. Unless otherwise specified, the tests may be applied by any suitable device because results are dependent only upon correctly applied loads and not upon the apparatus. The test equipment sh

32、all be capable of following the deformations that may occur during the tests. 4.3 Tolerances Unless otherwise stated: forces shall have an accuracy of 5% of the nominal force; dimensions an accuracy of l,0 mm of the nominal dimension; masses an accuracy of 0,5% of the nominal mass; velocities an acc

33、uracy of 5% of the nominal velocity; angles an accuracy of 2 of the nominal angle. The accuracy for the position of loading pads shall be 5 mm. The relationship 10N = 1 kg may be used. 4.4 Sequence of testing The tests shall be carried out on the same unit. The tests shall be carried out on the same

34、 part and in the specified sequence, but it is not necessary to test the different parts of the item in the sequence of the clauses. For any unit fitted with more than one flap, door or extension element that is identical in every respect excluding the direction of opening, it is only necessary to t

35、est one of the relevant flaps, doors or extension elements. For an item fitted with flaps, doors or extension elements which are not identical, the flap, door or extension element producing the most adverse conditions shall be tested. EN 14074:2004 (E) 6 5 Test apparatus 5.1 Obstacles for rolling te

36、st Steel strips, 50 mm wide and 2 mm high with the edges having a radius of 2 mm, 500 mm apart and parallel on the floor surface and perpendicular to the test direction 5.2 Floor surface A rigid, horizontal and flat surface. For the rolling test, a horizontal smooth steel surface. 5.3 Wall Surface A

37、 rigid, vertical and flat surface. 5.4 Stops Devices to prevent the unit from sliding no higher than 12 mm except in cases where the design of the unit necessitates the use of higher stops, in which case the lowest that will prevent the item from sliding shall be used. 5.5 Masses Masses shall not re

38、inforce the structure or redistribute the stresses. If bags with metal shots etc. are used they shall be divided into small compartments to prevent the contents from moving during the tests. Loads shall be evenly distributed unless otherwise stated. Suspended pocket files shall be loaded with typing

39、 paper or a suitable representation of it and where applicable pocket files shall be oriented in the most adverse direction. 5.6 Glass marbles Glass marbles between 10 mm and 15 mm in diameter shall be used for the slam open test for extension elements described in (6.2.3). They shall be in a flexib

40、le bag large enough to allow them to move freely during the test. 5.7 Loading pad A rigid cylindrical object 100mm in diameter (or 50 mm in diameter to be used in limited space), having a flat face with 12 mm radius on the edge. 5.8 Apparatus for slam open/shut of extension elements Apparatus as wel

41、l as calibration instructions are given in annex A. EN 14074:2004 (E) 7 6 Test methods 6.1 Determination of loading of storage parts The volume of extension elements shall be taken as the area of the bottom of the extension element multiplied by the clear height. The clear height is the distance bet

42、ween the top surface of the bottom of the extension element and the lower edge of the front of the extension element of the extension element above, or the structure of the unit. All parts intended for storage purposes shall be uniformly loaded according to Table 1 unless otherwise specified by the

43、manufacturer. Table 1 Loading of storage parts Part Load Shelves kg/dm 1,5 Clothes Rails kg/dm 5,0 Extension elements kg/dm 0,5 Suspended pocket files kg/dm a)4,0 a)Measured perpendicular to the suspended pocket file. Further loads shall be placed on top of free standing units if this is necessary t

44、o prevent tilting. 6.2 Extension elements 6.2.1 Strength of extension elements Load the extension element according to 6.1. Open the extension element to its open stops. If it is not fitted with open stops, and is intended to be taken out, open it to the point at which one-third of its inside length

45、 (depth) remains inside the unit, see figure 1. Apply a vertical force equal to the total mass of the extension element up to a max of 250 N to one top front corner, see figure 1. The total mass is the weight of the extension element plus the load specified in 6.1. If the extension element is forced

46、 out of the unit it shall be re-assembled if necessary and returned to the unit. This shall be recorded in the report. Carry out the test ten times. Before and after the test, inspect the function of the extension element (including the opening and closing forces if required). EN 14074:2004 (E) 8 Di

47、mensions in millimetres Figure 1 Strength of extension elements 6.2.2 Durability test of extension elements Load the extension element according to 6.1. Open and close the extension element without vertical and horizontal support, over its full distance of travel, without forcing the stops, for 50 0

48、00 cycles. The recommended rate is maximum 6 cycles per minute. If an extension element is not equipped with open stops, open it from the fully closed position to the point at which one-third of the inside length (depth) of the extension element remains inside the unit, see figure 2. The operating force shall be applied at the level intended in normal use (i.e. the extension element handle) or, in case of two handles, in the middle between the handles. Ensure that no downwards force is applied to the ext