ANSI ISO 3776-3-2015 Tractors and machinery for agriculture - Seat belts - Part 3 Requirements for assemblies.pdf

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1、 ASABE/ISO 3776-3:2009 OCT2015 Tractors and machinery for agriculture Seat belts Part 3: Requirements for assemblies American Society of Agricultural and Biological Engineers ASABE is a professional and technical organization, of members worldwide, who are dedicated to advancement of engineering app

2、licable to agricultural, food, and biological systems. ASABE Standards are consensus documents developed and adopted by the American Society of Agricultural and Biological Engineers to meet standardization needs within the scope of the Society; principally agricultural field equipment, farmstead equ

3、ipment, structures, soil and water resource management, turf and landscape equipment, forest engineering, food and process engineering, electric power applications, plant and animal environment, and waste management. NOTE: ASABE Standards, Engineering Practices, and Data are informational and adviso

4、ry only. Their use by anyone engaged in industry or trade is entirely voluntary. The ASABE assumes no responsibility for results attributable to the application of ASABE Standards, Engineering Practices, and Data. Conformity does not ensure compliance with applicable ordinances, laws and regulations

5、. Prospective users are responsible for protecting themselves against liability for infringement of patents. ASABE Standards, Engineering Practices, and Data initially approved prior to the society name change in July of 2005 are designated as “ASAE“, regardless of the revision approval date. Newly

6、developed Standards, Engineering Practices and Data approved after July of 2005 are designated as “ASABE“. Standards designated as “ANSI“ are American National Standards as are all ISO adoptions published by ASABE. Adoption as an American National Standard requires verification by ANSI that the requ

7、irements for due process, consensus, and other criteria for approval have been met by ASABE. Consensus is established when, in the judgment of the ANSI Board of Standards Review, substantial agreement has been reached by directly and materially affected interests. Substantial agreement means much mo

8、re than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, and that a concerted effort be made toward their resolution. CAUTION NOTICE: ASABE and ANSI standards may be revised or withdrawn at any time. Additionally, procedures of ASABE r

9、equire that action be taken periodically to reaffirm, revise, or withdraw each standard. Copyright American Society of Agricultural and Biological Engineers. All rights reserved. ASABE, 2950 Niles Road, St. Joseph, Ml 49085-9659, USA, phone 269-429-0300, fax 269-429-3852, hqasabe.org ASABE/ISO3776-3

10、:2009 OCT2015 Copyright American Society of Agricultural and Biological Engineers 1 ASABE/ISO 3776-3:2009 OCT2015 Revision Approved October 2015 as an American National Standard Tractors and machinery for agriculture Seat belts Part 3: Requirements for assemblies These materials are subject to copyr

11、ight claims of ISO and ASABE. No part of this publication may be reproduced in any form, including an electronic retrieval system, without the prior written permission of ASABE. All requests pertaining to the ASABE/ISO 3776-3:2009 OCT2015 standard should be submitted to ASABE. This standard was revi

12、ewed for adoption by the ASABE Agricultural Machinery Common Test Technical subcommittee, and has been formerly approved by the Power and Machinery Division. Adopted with deviations by ASABE May 2012; approved as an American National Standard July 2012; adopted identically and approved by ANSI Octob

13、er 2015. Keywords: Anchorage, Seat belts, Self-propelled machinery, Tractors 0 Foreword 0.1 ASABE/ISO 3776-3:2009, Agricultural Tractors and machinery for agricultureSeat beltsPart 3: Requirement for assemblies, is an adoption without modifications of the identically titled ISO standard ISO 3776-3:2

14、009, Agricultural Tractors and machinery for agriculture Seat belts Part 3: Requirement for assemblies. 0.2 ANSI/ASABE AD3776-3:2009 specifies the requirements for pelvic restraint (seat) belt assemblies intended to be used by the operators of agricultural tractors and self-propelled machinery. NOTE

15、 Seat belt assemblies that meet the requirements of UNECE R16:2000, Clause 6, but excluding 6.4 of that regulation, or seat belt assemblies complying with the requirements of SAE J386 are deemed to comply with the requirements of this part of ISO 3776. 0.3 Five normative references are listed in ISO

16、 3776-3:2009. These references have been reviewed and accepted as part of the adoption of ASABE adoption number. 0.4 This standard has been approved as an American National standard by ANSI (American National Standards Institute). Text of ISO 3776-3:2009, Agricultural Tractors and machinery for agri

17、culture Seat belts Part 3: Requirement for assemblies, follows. 1 Scope This part of ISO 3776 specifies the requirements for pelvic restraint (seat) belt assemblies intended to be used by the operators of agricultural tractors and self-propelled machinery. NOTE Seat belt assemblies that meet the req

18、uirements of UNECE R16:2000, Clause 6, but excluding 6.4 of that regulation, or seat belt assemblies complying with the requirements of SAE J386 are deemed to comply with the requirements of this part of ISO 3776. ASABE/ISO3776-3:2009 OCT2015 Copyright American Society of Agricultural and Biological

19、 Engineers 2 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 3411, Ear

20、th-moving machinery Physical dimensions of operators and minimum operator space envelope ISO 3776-1, Tractors and machinery for agriculture Seat belts Part 1: Anchorage location requirements ISO 3776-2:2007, Tractors and machinery for agriculture Seat belts Part 2: Anchorage strength requirements AS

21、TM B117, Standard Practice for Operating Salt Spray (Fog) Apparatus ASTM D756:1993, Practice for Determination of Weight and Shape Changes of Plastics Under Accelerated Service Conditions 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 anchor

22、age provision to transfer forces applied to the seat belt assembly to the structure of the tractor or the machine ISO 3776-2 3.2 creep amount of unintentional lengthening of the seat belt assembly loop during use caused by motion of the machine, seat and seat-belted occupant 3.3 hardware any metal o

23、r rigid plastic part of the restraint system 3.3.1 buckle and latch plate quick release connector which fastens the belt assembly into a loop 3.3.2 attachment hardware all load-bearing devices designed for securing the webbing portion of a seat belt assembly to a tractor or agricultural machine stru

24、cture or intermediate structural component including but not limited to retractors, end fittings, bolts, studs, nuts or other attachment means, but not including those components permanently fixed to the tractor or agricultural machine NOTE If the seat belt is attached to the seat, the seat is not c

25、onsidered to be attachment hardware. 3.3.3 adjustment hardware mechanisms designed for adjusting the belt assembly to fit the user, including such devices that may be integral with a buckle, attachment mechanism, or retractor ASABE/ISO3776-3:2009 OCT2015 Copyright American Society of Agricultural an

26、d Biological Engineers 3 3.4 loop complete seat belt assembly as it would be installed around the seat occupant 3.5 polyester yarn yarn spun from polyethylene terephthalate 3.6 retractor device for storing all or part of the strap material of a seat belt assembly 3.7 roping tendency of a piece of ma

27、terial to twist upon itself or roll up transversely, remaining in the form of a rope instead of staying in its original strap form 3.8 seat belt assembly belt, including any buckle, length adjustor, retractor, and means for securing to an anchorage, that fastens across the pelvic area to provide pel

28、vic restraint during operation and roll-over conditions ISO 3776-2 4 Requirements 4.1 General 4.1.1 Single occupancy A seat belt assembly shall be designed for use by only one person and at any one time. 4.1.2 Release A seat belt assembly shall be provided with a buckle or latch readily accessible t

29、o the occupant, and designed to provide easy and rapid release of the assembly with a single motion. It shall also be capable of being released with either hand, bare or gloved. The buckle shall be designed to minimize the possibility of accidental release due to operator movement, inertia or extern

30、al forces. Additionally, the buckle shall be in accordance with 4.3 and 4.4. 4.1.3 Adjustment The seat belt shall be self-adjusting or readily adjustable by a means within easy reach of the seat occupant. Adjustment to a snug condition shall accommodate in all operating positions an operator in at l

31、east the 5thto 95thpercentile as defined in ISO 3411. 4.1.4 Creep 4.1.4.1 General Two seat belt assemblies of the same part number with adjusting devices shall be tested in accordance with 4.1.4.2 and 4.1.4.3. The creep shall not exceed 25 mm for each adjusting device in the assembly. The sum of cre

32、ep amounts for all adjusting devices in the belt assembly shall not exceed 40 mm. ASABE/ISO3776-3:2009 OCT2015 Copyright American Society of Agricultural and Biological Engineers 4 4.1.4.2 Conditions Two seat belt assemblies of the same part number shall be conditioned for 24 h at a temperature of (

33、20 5)C and (65 5)% relative humidity. The test shall be conducted at a temperature between 15C and 30C. The test apparatus shall conform to that shown in Figure 1 for tests 1 and 2. 4.1.4.3 Test procedure Before starting the tests, complete 20 cycles of the reciprocating motion described in c) to re

34、move initial slack. Mark the force-bearing strap material at each adjuster in preparation for measuring creep. a) Mount the belts as shown in Figure 1 for tests 1 and 2. b) Apply a 5 kg mass to the lower end of each belt assembly. If there is a free end serving as a reserve strap, it shall not be fa

35、stened or clipped to the section subjected to the 5 kg mass. c) Apply a reciprocating-motion total amplitude of (300 20) mm to the top end of each belt assembly. d) Ensure that the strap in the slack position maintains contact with the full length of the body block on the test bench. e) Guide the 5

36、kg mass vertically so as to prevent swaying of the mass and twisting of the belt during testing. The attachment shall be fixed to the 5 kg mass in the same manner as in the tractor or agricultural machine. f) Complete 1 000 cycles at a frequency of 0,5 Hz at the reciprocation motion of (300 20) mm.

37、The 5 kg mass shall be applied only during the time corresponding to a shift of (100 12) mm of each half cycle. See Figure 1. g) Measure the distance the strap material has moved at each adjusting device. ASABE/ISO3776-3:2009 OCT2015 Copyright American Society of Agricultural and Biological Engineer

38、s 5 Figure 1 Creep test apparatus 4.1.5 Breaking strength 4.1.5.1 Test procedure All the components of three seat belt assemblies shall be tested. a) Adjust the pelvic restraint between seat belt anchorages to a length between 914 mm and 1 219 mm, or as near to this length as possible if the design

39、of the pelvic restraint does not permit its adjustment to this length. An automatic locking or emergency locking retractor, when included in a seat belt assembly, shall be locked at the start of the test with a tension in the strapping slightly in excess of the retractile force, in order to keep the

40、 retractor locked. b) Orientate the attachment hardware to the strapping as specified in e) below and as shown in Figure 2. c) Apply a tensile force of (11,1 0,1) kN to the components in any convenient manner: the extension between anchorages under this force shall not increase by more than 500 mm.

41、d) Reduce the tensile force. The buckle release force shall be in accordance with 4.4.3. ASABE/ISO3776-3:2009 OCT2015 Copyright American Society of Agricultural and Biological Engineers 6 e) Attach the attachment hardware furnished with the seat belt assembly to the anchorage bar. The attaching bolt

42、, with the listed exceptions, shall be parallel to or at an angle of 45 or 90 to the strapping, whichever results in the greatest angle between strapping and attachment hardware. Eye bolts shall be vertical, and the attaching bolts of a seat belt assembly designed for use in specific models of machi

43、nes shall be installed to produce the maximum angle in use indicated by the installation instructions. 4.1.5.2 Acceptance condition The complete seat belt assembly, including strapping, straps, buckles, adjustment and attachment hardware and retractors, shall withstand a tensile force of not less th

44、an 11,1 kN i.e. each structural component of the assembly shall withstand a force of 11,1 kN when tested by the procedure of 4.1.5.1. Figure 2 Loop force testing machine 4.1.6 Marking (labelling) Each conformant seat belt assembly and/or section of the seat belt assembly shall be permanently and leg

45、ibly labelled with the following: reference to this part of ISO 3776 (i.e. “ISO 3776-3:2009”); year of manufacture; model or style number; name or trademark of the manufacturer or importer. 4.1.7 Usage and maintenance instructions When packaged separately, seat belt assemblies shall be accompanied b

46、y written instructions for a) installation, including the proper manner of threading the strap into the attachment hardware when threadable hardware is supplied, ASABE/ISO3776-3:2009 OCT2015 Copyright American Society of Agricultural and Biological Engineers 7 b) correct wearing of the installed ass

47、embly, and c) proper maintenance (including cleaning procedures) and periodic inspection for wear or damage. 4.2 Strap material requirements 4.2.1 Material The strap material shall have resistance to mild acids, alkalies, mildew, aging, moisture and sunlight equal to or better than that of untreated

48、 polyester yarn. 4.2.2 Stiffness In order to minimize roping, the strap material shall be woven and/or treated to produce stiffness in the transverse direction. The stiffness shall be effective for the usable life of the strap. The strap shall be flexible in the longitudinal direction to permit adju

49、stment at 40C. 4.2.3 Colour Preferred colours are those recommended by the strap material manufacturer as being less sensitive to ultraviolet rays. 4.2.4 Width The strap material shall not be less than 46 mm in width when measured under a no-force condition. 4.2.5 Ends The ends shall be protected or treated to prevent unravelling and shall not pull out of the adjustment hardware at maximum size adjustment. 4.2.6 Strength Test procedure Condition three specimens f