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1、INTERNATIONAL STANDARD ISO 3776-1 First edition 2006-09-15 Reference number ISO 3776-1:2006(E) ISO 2006 Tractors and machinery for agriculture Seat belts Part 1: Anchorage location requirements Tracteurs et matriels agricoles Ceintures de scurit Partie 1: Exigences relatives lemplacement des ancrage
2、s ISO 3776-1:2006(E) ii ISO 2006 All rights reserved PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the comput
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5、entral Secretariat at the address given below. ISO 2006 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IS
6、O at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ISO 3776-1:2006(E) ISO 2006 All rights reserved iii Forewor
7、d 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 carried out through ISO technical committees. Each member body interested in a subject for which a technica
8、l 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. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of ele
9、ctrotechnical 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 International Standards. Draft International Standards adopted by the technical committees are circulated to th
10、e 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 elements of this document may be the subject of patent rights. ISO shall not be held responsible for ide
11、ntifying any or all such patent rights. ISO 3776-1 was prepared by Technical Committee ISO/TC 23, Tractors and machinery for agriculture and forestry, Subcommittee SC 3, Safety and comfort of the operator. This first edition of ISO 3776-1, together with ISO 3776-2, cancels and replaces ISO 3776:1989
12、, of which it constitutes a technical revision. Notably, it incorporates the following changes: the seat index point (SIP) is used as the reference point; the relative position of the anchorages has been aligned with ISO 6683; the strength testing of the anchorages is now dealt with exclusively by I
13、SO/OECD 3776-2. These modifications allow the alignment of ISO standards developed for different sectors and the harmonization of strength testing of seat belts and their anchorages according to ISO and OECD. ISO 3776 consists of the following parts, under the general title Tractors and machinery fo
14、r agriculture Seat belts: Part 1: Anchorage location requirements Part 2: Anchorage strength requirements joint publication with OECD -,-,- . iv -,-,- INTERNATIONAL STANDARDISO 3776-1:2006(E) ISO 2006 All rights reserved 1 Tractors and machinery for agriculture Seat belts Part 1: Anchorage location
15、requirements 1Scope This part of ISO 3776 specifies the location, relative position and threaded hole dimensions of the anchorages for pelvic restraint (seat) belt assemblies intended to be used by the operators of agricultural tractors and self-propelled machinery. 2Normative references The followi
16、ng 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 5353, Earth-moving machinery, and tractors and machinery
17、 for agriculture and forestry Seat index point 3Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 anchorage provision to transfer forces applied to the seat belt assembly to the structure of the tractor or the machine 3.2 seat belt assembly belt,
18、 including any buckle, length adjustor, retractor, and means for securing to an anchorage, that fastens across the pelvic area to provide pelvic restraint during operation and roll-over conditions 3.3 seat belt system seat belt assembly with anchorages 4Anchorages 4.1Choice of anchorage location Eac
19、h seat belt system shall have two anchorages. If the seat does not swivel or have a suspension system, the seat belt assembly may be anchored to the seat or the tractor/machine at any point within the hatched zone shown in Figure 1. Alternatively, the seat belt assembly shall be attached to the anch
20、orages on the seat near the rear corners of the seat cushion within the hatched zone shown in Figure 1, such that the seat belt assembly moves with the seat cushion at all times. ISO 3776-1:2006(E) 2 ISO 2006 All rights reserved Belts, cables, or similar flexible devices may be used to transfer seat
21、 belt assembly loads from the seat anchorages to the tractor or self-propelled machine. 4.2Relative position of anchorages 4.2.1General The anchorages shall be positioned within the hatched zone shown in Figure 1 for example, below a line at to the horizontal and behind the vertical line, through th
22、e seat index point (SIP). The anchorages, B1 and B2, shall be at a horizontal distance of not less than and not more than from the seat longitudinal plane of symmetry. However, if the seat structure makes it necessary, this lower limit may be reduced, provided suitable arrangements have been made to
23、 ensure an appropriate spacing of the webbing where in contact with the operators body. Dimensions in millimetres Key B1anchorage (right side) B2anchorage (left side) 1preferred angle of webbing 2seat index point (SIP) Figure 1 Location and relative position of anchorages 10 175 mm350 mm -,-,- ISO 3
24、776-1:2006(E) ISO 2006 All rights reserved 3 4.2.2Seat index point The SIP (see Figure 1) shall be determined in accordance with ISO 5353, or its position with respect to the seat shall be as specified by the seat manufacturer. 4.2.3Webbing angle to horizontal The angle of the webbing to the horizon
25、tal plane shall be as near as possible to for all normal driving positions of the seat. The angle may vary from , nevertheless, in no driving position shall it be less than or greater than . See Figure 1. 4.3Dimension of anchorage threaded holes An anchorage shall consist of a threaded hole of 7/16-
26、20 UNF 2 B. The axis of the threaded hole shall be at to the seat longitudinal plane of symmetry. Where a seat belt is designed, fitted and supplied with the tractor or machine by the tractor/machine manufacturer, alternative thread sizes, for example, 1/2-13 UNC 2A or M12, may be used, provided the
27、 anchorages supplied comply with all the other requirements of this part of ISO 3776. 4.4Equivalence with ISO 6683 Seat belt anchorages fulfilling the relevant requirements of ISO 6683 are also in conformance with this part of ISO 3776. 45 4510 75 905 -,-,- ISO 3776-1:2006(E) 4 ISO 2006 All rights reserved Bibliography 1ISO 6683, Earth-moving machinery Seat belts and seat belt anchorages Performance requirements and tests . 5 ISO 3776-1:2006(E) ICS 65.060.10 Price based on 4 pages ISO 2006 All rights reserved -,-,-
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