ISO 11839:2021 Machinery for forestry — Thrown object guard — Test method and performance criteriaC AU T ION — T he t e s t me t ho d s p e c i f ie d i n t h i s do c u ment i nvol ve s t he u s e of d y n a m ic processes which could lead t

标准简介

Machinery for forestry — Thrown object guard — Test method and performance criteriaC AU T ION — T he t e s t me t ho d s p e c i f ie d i n t h i s do c u ment i nvol ve s t he u s e of d y n a m ic processes which could lead to a hazardous situation. The test creates projectile shots. Under no circumstances shall the test be performed without the containment structure for the test apparatus in place.由国际标准化组织于2021-02发布，适用于全球。

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标准文档类型为Machinery for forestry — Thrown object guard — Test method and performance criteriaC AU T ION — T he t e s t me t ho d s p e c i f ie d i n t h i s do c u ment i nvol ve s t he u s e of d y n a m ic processes which could lead to a hazardous situation. The test creates projectile shots. Under no circumstances shall the test be performed without the containment structure for the test apparatus in place.高清PDF版本（文字版），标准文档内可进行搜索，可以复制原文，可粘贴。

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Machinery for forestry — Thrown object guard — Test method and performance criteria

C AU T ION — T he t e s t me t ho d s p e c i f ie d i n t h i s do c u ment i nvol ve s t he u s e of d y n a m ic

processes which could lead to a hazardous situation. The test creates projectile shots. Under no circumstances shall the test be performed without the containment structure for the test apparatus in place.

1 Scope

This document establishes a laboratory test method and performance requirements for thrown object guards (TOG) that provide operator protection against thrown objects. This applies to mobile and self-

propelled machinery used in forestry and related operations including, but not limited to, those defined in ISO 6814. The TOG is intended to provide reasonable protection for the operator on the host machine from powered rotating cutting or grinding elements and residual matter thrown by an attachment on the host machine.

As the tests in the document are dependent upon the mass, velocity, and the cutting or grinding element profile, the TOG meeting the requirements of this document are specific to each cutting or grinding attachment and the host machine model.

This document does not address protection from saw chain shot.

NOTE A separate standard ISO 21876 addresses saw chain shot hazards.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements 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 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel — Part 1: Bolts, screws and studs with specified property classes — Coarse thread and fine pitch thread

ISO 898-2, Mechanical properties of fasteners made of carbon steel and alloy steel — Part 2: Nuts with specified property classes — Coarse thread and fine pitch thread

ISO 5353, Earth-moving machinery, and tractors and machinery for agriculture and forestry — Seat index point

ISO 9248, Earth-moving machinery — Units for dimensions, performance and capacities, and their measurement accuracies

ISO 12100, Safety of machinery — General principles for design — Risk assessment and risk reduction

ASTM A-108, Standard Specification for Steel Bar, Carbon and Alloy, Cold-Finished

3 Terms a nd definiti ons

For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https://w ww .iso. org/o bp

— IEC Electropedia: available at http:// www .electropedia .org/ 3.1

cutting or grinding element

cutting or grinding component incorporating single or multiple cutting or grinding surfaces

Note 1 to entry: The cutting or grinding element attachment hardware is not considered part of the cutting or grinding element for purposes of calculating the cutting element mass.

3.2

cutting or grinding attachment

mechanism designed to control and propel cutting or grinding elements (3.1) that are used in mobile and self-propelled machinery used in forestry and related operations

3.3

de f le c t ion-l i m it i n g volu me

DLV

approximation of a large seated operator as defined in ISO 3411

[SOURCE: ISO 3164:2013, 3.1]

3.4

f a l l i n g- obje c t pr ot e c t i ve s t r uc t u r e

FOPS

system of structural members arranged in such a way as to provide operators with reasonable protection from falling objects (e.g. trees, rocks)

[SOURCE: ISO 8083:2006, 3.1]

3.5

independent guard

protective guard that is not attached to and does not receive support from an operator cab or canopy

3.6

indicator panel

corrugated cardboard approximately 3,2 mm thick

3.7

operator protective structure

OPS

system of structural members arranged in such a way as to minimize the possibility of operator injury from penetrating objects (e.g. whipping saplings, branches, broken winch lines)

3.8

r ol l- over pr ot e c t i ve s t r uc t u r e

ROPS

system of structural members whose primary purpose is to reduce the possibility of a seat-belted operator being crushed should the machine roll over

[SOURCE: ISO 8082-1:2009, 3.1, modified — Note 1 to entry is not included here]

3.9

sabot

device or holder used in an impact object launcher (3.11) that carries an impact object (3.10) as it travels through the launcher

3.10

impact object

representative object used to test the TOG

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