1、BRITISH STANDARDBS ISO 20957-2:2005Stationary training equipment Part 2: Strength training equipment, additional specific safety requirements and test methods ICS 97.220.30g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51
2、g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS ISO 20957-2:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 January 2006 BSI 30 January 2006ISBN 0 580 47079 2National forewordThis British Standard reproduces
3、verbatim ISO 20957-2:2005 and implements it as the UK national standard.The UK participation in its preparation was entrusted by Technical Committee SW/136, Sports, playground and other recreational equipment, to Subcommittee SW/136/4, Stationary training equipment, which has the responsibility to:
4、A list of organizations represented on this subcommittee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Cor
5、respondence 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 its correct application. Compliance with a British Standard does not
6、 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 UK interests informed; monitor related international and European developments a
7、nd promulgate them in the UK.Summary of pagesThis document comprises a front cover, an inside front cover, the ISO title page, pages ii to iv, pages 1 to 10, an inside back cover and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendmen
8、ts issued since publicationAmd. No. Date CommentsReference numberISO 20957-2:2005(E)INTERNATIONAL STANDARD ISO20957-2First edition2005-12-15Stationary training equipment Part 2: Strength training equipment, additional specific safety requirements and test methods quipement dentranement fixe Partie 2
9、: quipement dentranement de force, exigences spcifiques de scurit et mthodes dessai supplmentaires BS ISO 20957-2:2005ii iiiContents Page Foreword iv 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 1 4 Classification. 1 5 Safety requirements . 1 5.1 General. 1 5.2 Loading 2 5.3 Endur
10、ance load . 3 5.4 Stacked weights 3 5.5 Weight discs 6 5.6 Minimum achievable training loads 6 6 Test methods. 8 6.1 General. 8 6.2 Testing of intrinsic loading 8 6.3 Testing of extrinsic loading . 8 6.4 Testing of the weight discs support . 8 6.5 Testing of endurance load . 9 6.6 Test report . 9 7
11、Additional instructions for use 9 8 Additional exercise instructions . 10 BS ISO 20957-2:2005iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carr
12、ied out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
13、ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare Internat
14、ional Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the e
15、lements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 20957-2 was prepared by Technical Committee ISO/TC 83, Sports and recreational equipment. ISO 20957 consists of the following parts, under the general ti
16、tle Stationary training equipment: Part 1: General safety requirements and test methods Part 2: Strength training equipment, additional specific safety requirements and test methods Part 4: Strength training benches, additional specific safety requirements and test methods Part 5: Pedal crank traini
17、ng equipment, additional specific safety requirements and test methods Part 6: Treadmills, additional specific safety requirements and test methods Part 7: Rowing machines, additional specific safety requirements and test methods Part 8: Steppers, stairclimbers and climbers Additional specific safet
18、y requirements and test methods Part 9: Elliptical trainers, additional specific safety requirements and test methods BS ISO 20957-2:20051Stationary training equipment Part 2: Strength training equipment, additional specific safety requirements and test methods 1 Scope This part of ISO 20957 specifi
19、es additional safety requirements for strength training equipment in addition to the general safety requirements of ISO 20957-1. This part of ISO 20957 is applicable to stationary training equipment type strength training equipment with stack weight resistance or other means of resistance like weigh
20、t discs, elastic cords, hydraulic, pneumatic and magnetic systems and springs (type 2) (hereinafter referred to as training equipment) with the classes S and H. Any attachments provided with the training equipment for the performance of additional exercises are subject to the requirements of ISO 209
21、57-1. 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. ISO 20957-1:2005, St
22、ationary training equipment Part 1: General safety requirements and test methods EN 294, Safety of machinery Safety distance to prevent danger zones being reached by the upper limbs 3 Terms and definitions For the purposes of this document the terms and definitions given in ISO 20957-1 apply. 4 Clas
23、sification Clause 4 of ISO 20957-1:2005 applies. 5 Safety requirements 5.1 General Depending on the design of the piece of training equipment the following requirements shall apply as appropriate. BS ISO 20957-2:20052 5.2 Loading 5.2.1 Intrinsic loading Each piece of equipment loaded with the users
24、body mass shall withstand a force F: for class H 2,5 the body mass (100 kg) without breakage; for class S 2 the body mass (100 kg) without permanent deformation. When tested according to 6.2, supports (e.g. load-bearing surfaces) shall not be deformed by more than f = 1/100, cantilever supports (can
25、tilever surfaces) by more than f = 1/150 and other dimensions by more than 1 %. The training equipment shall not break when a static load of 4 the body mass is applied. 5.2.2 Extrinsic loading 5.2.2.1 Class H When tested according to 6.3 and loaded with the users body mass and/or reaction forces or
26、moments of the user, each piece of equipment shall withstand, without breakage, a load, F in newtons according to Equation (1): F = Gk+ 1,5 G 2,5 9,81 (1) where: G is the maximum load in kilograms indicated by the manufacturer (see 6.8 of ISO 20957-1:2005); Gkis the force in kilograms determined by
27、the proportional body mass (100 kg); 1,5 is the dynamic coefficient; 2,5 is the safety coefficient. 5.2.2.2 Class S When tested according to 6.3 and loaded with the users body mass and/or reaction forces or moments of the user, each piece of equipment shall withstand a load F according to Equation (
28、2): F = Gk+ 1,5 G 2 9,81 (2) where: G is the maximum load in kilograms indicated by the manufacturer (see 6.8 of ISO 20957-1:2005). The torques as specified in Table 1 are to be taken as basis for the calculation of G, if greater than the manufacturers stated maximum load; Gkis the force in kilogram
29、s determined by the proportional body mass (100 kg); 1,5 is the dynamic coefficient; 2 is the safety coefficient. BS ISO 20957-2:20053After the test, supports (load bearing surfaces) shall not be deformed by more than f = 1/100, cantilever supports (cantilever surfaces) by not more than f = 1/150 an
30、d other dimensions by not more than 1 %. If greater than manufacturers maximum stated load, the equipment shall be capable of accepting a minimal torque load as specified in Table 1, throughout the range of movement of each exercise for which the equipment is designed. The training equipment shall n
31、ot break when a static load according to Equation (2) with a safety coefficient of 4 is applied. 5.3 Endurance load When tested according to 6.4, the training equipment shall be capable of normal functioning. When the training equipment consists of two or more separate functional units, each shall w
32、ithstand the endurance load test. When more than one function is tested, which involve use of common components e.g.: ropes, pulleys and bearings, these can be replaced before each separate test. 5.4 Stacked weights 5.4.1 Access to squeeze and/or shear points 5.4.1.1 General The uncontrolled access
33、by third parties to squeeze and/or shear points of stacked weights shall be prevented. Weights that can only be lifted as a whole block shall not come closer than 60 mm during movement to any part of the equipment or the ground. 5.4.1.2 Class H This can be achieved by either: a) surrounding by a cas
34、ing in conformance with EN 294 with the exception of a maximum 75 mm wide gap for setting of the weights; or b) by locking the machine to prevent moving of the stacked weights when the equipment is not in use and by utilizing the training area to deny access to third parties see 3.2 and 9 c) of ISO
35、20957-1:2005. 5.4.1.3 Class S 5.4.1.3.1 Encasing Where stacked weights are behind the user in the normal exercise position as described in the users manual (see Figure 1, vertical plane AB) they shall be encased on all sides except one side where a gap of 75 mm maximum is allowed for selection of th
36、e weights. Stacked weights that are encased shall fulfill the following requirement: up to 1 800 mm the encasing shall be at least 60 mm higher than the upper edge of the block of weights in its highest position. BS ISO 20957-2:20054 Dimensions in millimeters Key 1 head, chest or back support Figure
37、 1 Weight stack behind the user Where the whole of the stacked weights are at the side of the user and in front of AB (see Figure 2) they shall be encased on the 3 sides furthest from the user. Test in accordance with 6.1.1. Selection of the weights shall be from the open side. If any part of the we
38、ight stack projects behind AB (see Figure 3) it shall be encased on all sides. AB is the line drawn laterally from the head, chest or back support in its most onerous position. If there is no support the line is drawn laterally from the most onerous user position. Dimensions in millimeters Key 1 hea
39、d, chest or back support Figure 2 Weight stack in front of AB BS ISO 20957-2:20055Dimensions in millimeters Key 1 head, chest or back support Figure 3 Weight stack behind AB Multiweight stack machines do not require guarding on the 3 sides furthest from the user provided there is a framework on thes
40、e sides which prevents uncontrolled access by third parties. On the side adjacent to the user the requirements apply as in 5.4.1.2. 5.4.1.3.2 No encasing Where the stacked weights are always in front of the user and visible throughout the exercise without any important obstruction (see Figure 4), we
41、ights need not be encased. NOTE Encasing is not necessary because the negative forces exceed the positive forces and thus the user can always interrupt the movement of the stacked weights if a third party unintentionally enters the area of the stacked weights. Key 1 head, chest or back support aFiel
42、d of vision. Figure 4 Weight stack in front of the user BS ISO 20957-2:20056 5.5 Weight discs The maximum load ability of each weight support shall be indicated on the machine. Locking mechanisms shall be provided according to 5.4 of ISO 20957-1:2005 which prevent weight discs from falling off. Meth
43、ods of attachment or loading of other forms of resistance (e. g. elastic cords, springs) shall comply with 5.4 of ISO 20957-1:2005. Test in accordance with 6.1.2 and 6.1.4. 5.6 Minimum achievable training loads Machines which perform following biomechanical functions should meet the minimum torque v
44、alues shown in Table 1. Test in accordance with 6.1.4. BS ISO 20957-2:20057Table 1 Mean torque values for single-joint movement Elbow flexion 170 Nm (B) Elbow extension 170 Nm (B) Pull over 260 Nm (B) Arm lifting 130 Nm (B) Arms forwards 110 Nm each Arms backwards 110 Nm each Shoulder adduction 110
45、Nm each Shoulder abduction 50 Nm each Trunk flexion 280 Nm Trunk extension 450 Nm Hip extension 450 Nm each Hip flexion 190 Nm each Hip abduction 140 Nm each Hip adduction 200 Nm each Knee extension 600 Nm (B) Knee flexion 300 Nm (B) (B) Both sides and both legs respectively. Joint in motion. Joint
46、without motion. BS ISO 20957-2:20058 6 Test methods 6.1 General 6.1.1 Dimensional check 6.1.2 Visual examination 6.1.3 Tactile examination 6.1.4 Performance test 6.1.5 Manufacturers certificate 6.2 Testing of intrinsic loading Carry out the test quasi-statically. Apply the load, F (see 5.2.1) in the
47、 most onerous position of normal use on a surface area of 300 mm 300 mm for 5 min on the training equipment without fixing its legs during the test. Carry out the deformation test of class S according to Figure 5. Figure 5 Permanent deformation test 6.3 Testing of extrinsic loading Test as specified
48、 in 6.2 but place the determined load on the equipment as in normal practice and in a position which imposes greatest strain on the equipment. When the load bearing surface is divided, apply the test load to each part in proportion to the total surface area at the same time. 6.4 Testing of the weigh
49、t discs support Apply a vertical force in the direction of gravity in the centre of the usable support length for class H 2,5 the maximum specified load without breakage; for class S 2 the maximum specified load without permanent deformation and 4 the maximum specified load without breakage. BS ISO 20957-2:200596.5 Testing of endurance load Carry out the test as close as possible to normal exercise frequency and free of shocks for: a) class H 12 000 cycles over 80 % of
