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1、BRITISH STANDARD BS EN 12503-5:2001 Sports mats Part 5: Determination of the base friction The European Standard EN 12503-5:2001 has the status of a British Standard ICS 97.220.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 12503-5:2001 This British Standard, having
2、been prepared under the direction of the Consumer Products and Services Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 June 2001 BSI 06-2001 ISBN 0 580 37271 5 National foreword This British Standard is the official English language version
3、 of EN 12503-5:2001. Together with BS EN 12503-1:2001, BS EN 12503-2:2001, BS EN 12503-3:2001, BS EN 12503-4:2001, BS EN 12503-6:2001 and BS EN 12503-7:2001, it supersedes BS 1892-2.10:1990 which will be withdrawn on 15 August 2001. The UK participation in its preparation was entrusted to Technical
4、Committee SW/14, Gymnasium and sports equipment, 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 docum
5、ent may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of Br
6、itish Standards are responsible for their 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 European committee any enquiries on the interpretation, or proposals for chang
7、e, and keep the UK interests 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 6, an inside back cover and a back cover. The BSI copyright date
8、displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12503-5 April 2001 ICS 97.220.30 English version Sports mats - Part 5: Determination of the base friction Tapis de sp
9、ort - Partie 5: Dtermination des caractristiques antidrapantes de la base Sportmatten - Teil 5: Bestimmung der Reibungseigenschaften der Unterseite This European Standard was approved by CEN on 21 January 2001. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate
10、 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 Management Centre or to any CEN member. This European Standard exists i
11、n three official 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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of
12、 Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Manage
13、ment Centre: rue de Stassart, 36 B-1050 Brussels 2001 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12503-5:2001 E Page 2 EN 12503-5:2001 Contents Page Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14、 . . . . . . . . . . . . .2 1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 2 Normative references . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 3 Principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15、 . . . . . . . . . . . . . . . . . .3 4 Apparatus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 5 Test piece . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 6 Conditioning and test temperature . . . . . . . . .
16、 . . . . . . . . . . . . . . . . . . . .5 7 Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 8 Expression of results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 9 Test report . . . . . . . . . . . . . . . . . . . .
17、. . . . . . . . . . . . . . . . . . . . . . . . .6 Foreword This European Standard has been prepared by Technical Committee CEN/TC 136 “Sports, playground and other recreational equipment“, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standa
18、rd, either by publication of an identical text or by endorsement, at the latest by October 2001, and conflicting national standards shall be withdrawn at the latest by October 2001. This standard EN 12503 “Sports mats“ consists of: Part 1: Gymnastic mats, safety requirements Part 2: Pole vault and h
19、igh jump mats, safety requirement Part 3: Judo mats, safety requirements Part 4: Determination of shock absorption Part 5: Determination of the base friction Part 6: Determination of the top friction Part 7: Determination of static stiffness According to the CEN/CENELEC Internal Regulations, the nat
20、ional standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.
21、Page 3 EN 12503-5:2001 1 Scope This European Standard specifies a method for determining the anti-slip characteristics of the base of sports mats types 1 to 8 of EN 12503-1:2001 or type 12 of EN 12503-3:2001. 2 Normative references This Europen Standard incorporates, by dated or undated reference, p
22、rovisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in
23、it by amendment or revision. For undated references, the latest edition of the publication referred to applies (including amendments). EN 12503-1:2001 Sports mats Part 1: Gymnastic mats, safety requirements EN 12503-3:2001 Sports mats Part 3: Judo mats, safety requirements 3 Principle The mass of th
24、e mat is determined together with the slip resistance characteristics of the base of the mat. This is measured by an aluminium foot (slider) attached to the arm of a pendulum, which is allowed to slide over the base for a set distance and the energy absorbed by friction measured. 4 Apparatus 4.1 Fri
25、ction tester 4.1.1 The friction tester shall be in accordance with figure 1 and comprise of the following: a) a spring loaded slider of the mass, size and shape specified in 4.1.3 mounted on the end of a pendulum (see 4.1.2) so that the sliding edge is approximately 510 mm from the axis of suspensio
26、n; b) means for setting the column of the instrument vertical; c) means for raising and lowering the axis of suspension of the pendulum so that the slider can 1) swing clear of the surface of the test piece, and 2) be set to slide over a fixed length of surface of 126,0 mm. This length should be as
27、near as is visually possible but in any case within 1 mm; d) means for holding and releasing the pendulum; e) a pointer balanced about the axis of suspension, indicating the position of the pendulum throughout its forward swing and moving over the circular scale drawn as specified in 4.2. The mass o
28、f the pointer shall be not more than 85 g and the friction in the pointer mechanism shall be adjustable so that, with the pendulum swinging freely from a horizontal position, the outward tip of a 300 mm long pointer may be brought to rest on the forward swing of the pendulum at a point 10 mm below t
29、he horizontal. Page 4 EN 12503-5:2001 Key 1 Clutch 2 Adjustment screw 3 Pointer 4 Scale 6 Raise/lower mechanism 7 Slider 8 Adjustable feet 9 Wooden plate (approximately 10 mm thick) 5 Pendulum Figure 1 - Apparatus for determination of slip resistance 4.1.2 The mass of the pendulum including the slid
30、er shall be (1,50 0,03) kg, the centre of gravity lying on the axis of the arm at a distance of (410 5) mm from the centre of suspension. 4.1.3 The slider shall consist of an aluminium block 76 mm wide, 24 mm deep and 6 mm thick held on a rigid base with a total mass (aluminium plus mounting plate)
31、of (50 5) g which is mounted on an axis set at an angle of approximately 26 with the horizontal when the pendulum is at the lowest point of its swing, so that only the rear edge of the slider contacts the test surface, and the slider can turn about its axis without obstruction to follow unevenness o
32、f the surface perpendicular to the plane of the pendulum swing. The working edges of the unconditioned slider shall be square and clean cut, and free from contamination (abrasive or oil etc.). The slider shall be conditioned by mounting it onto the pendulum and carrying out 10 swings onto 400 grade
33、wet and dry paper. The slider shall be spring loaded against the test surface and the nominal static force Fs on the slider shall be (22,2 0,5) N in its median position; the change in the static force on the slider shall be not greater than 0,2 N per millimetre deflection of the slider. 4.2 Calibrat
34、ion of the friction tester The scale of the instrument when used for this test shall be the unit drawn up by means of the following equation: Fp a1 a2 Fs a3 l 100 where: is a measure of the coefficient of friction (times 100), expressed by a value without dimension; Fpis the force exerted by the pen
35、dulum, in N; a1is the distance of the effective centre of gravity of the pendulum from the centre of oscillation, in mm; Page 5 EN 12503-5:2001 a2is the vertical distance of the edge of the scale below the zero of the scale, which shall be 10 mm below the horizontal when the arm is released to swing
36、 freely from the horizontal, in mm; Fsis the nominal static force on the slider, in N, as defined in 4.1.3; a3is the sliding distance, in mm; lis the length of the pointer, in mm. 4.3 Scales for weighing the test pieces, measuring to an accuracy of 10 g. 5 Test piece The test piece shall comprise of
37、 the whole mat. 6 Conditioning and test temperature Condition the test piece for a minimum of 24 h at (21 3) C immediately before the test and carry out the test at the same temperature. 7 Procedure 7.1 Secure the test piece with its base surface uppermost. Arrange the tester in position over the te
38、st piece and level the apparatus precisely by means of the adjustable feet. Locate the friction tester in such a position that the slider can traverse the surface at approximately the middle of the mat. 7.2 Raise the pendulum mechanism until it can swing freely above the surface of the test piece. L
39、ock the pendulum into the horizontal position and rotate the pendulum. If the pointer is not horizontal, turn the adjustment screw until it is. Release the pendulum and note the position on the scale at which the pointer comes to rest. Repeat this at least three times. If this reading is not zero, a
40、djust the clutch at the picot point, until when operated a reading of zero is consistently obtained. 7.3 With the pendulum hanging freely, lower the pendulum until it touches the surface of the test piece. Lock the mechanism. Raise the slide by lifting the handle, move the pendulum to the right, low
41、er the slider until it touches the surface of the specimen and note the point of contact. Raise the slide again, move the pendulum to the left and note the point at which the slider just leaves the surface. With the aid of a ruler laid on the surface of the test piece, alongside the projected path o
42、f the slider, adjust the height of the pendulum mechanism until the length of the contact path of the slider is (126 1) mm. After setting this distance lock the pendulum mechanism securely at this height and re-check the sliders path length carefully, before making a test. 7.4 Lock the pendulum into
43、 the horizontal position and rotate the pointer to its rest position against the adjustment screw on the pendulum arm. Release the pendulum and allow the slider to execute a single traverse of the test piece. Without delay, make seven further swings of the pendulum, re-setting the pendulum and point
44、er after each swing. Note the readings indicated by the pointer for the last five swings. Always catch the pendulum as it begins its return swing. When returning the pendulum to its horizontal position, always raise the slider with the handle to prevent contact between the slider and the test piece.
45、 7.5 Repeat the procedure given in 7.1 to 7.4 to obtain readings in four directions by rotating the apparatus through 90 between each set of readings. 7.6 Determine the weight of the test piece. Page 6 EN 12503-5:2001 8 Expression of results Calculate the mean values for the five swings in each orie
46、ntation. Determine the lowest mean value of the four orientations. Calculate the frictional value using the following formula: L m 100 where: is the frictional value L is the lowest mean slip resistance value mis the mass of 1 m2 mat in kg Determine the lowest frictional value from the three test sp
47、ecimens. 9 Test report The test report shall contain the following information: a) a reference to this European Standard, EN 12503-5; b) a complete identification of the product tested, including type, source and manufacturers reference numbers; c) the frictional value; d) any deviations from the st
48、andard which may have affected the results. blank BS EN 12503-5:2001 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international le
49、vel. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel: 020 8996 900