GB/T 42607-2023 Powered hand-held hedge trimmers - Safety
1 Scope
This document specifies safety requirements and measures for the verification of the design and construction of hand-held, integrally-driven combustion engine hedge trimmers (hereafter referred to as “hedge trimmers”) designed to be used by a single operator for trimming hedges and bushes while utilizing one or more linear reciprocating cutter blades.
This document is also applicable to "split-boom" type hedge trimmers and to multi-purpose machines when configured as a hedge trimmer.
It establishes methods for the elimination or reduction of hazards arising from the use of the hedge trimmers. In addition, it specifies the type of information to be provided by the manufacturer on safe working practices.
This document deals with all significant hazards, hazardous situations and events relevant to powered hand-held hedge trimmers when they are used as intended and under the conditions of misuse that are reasonably foreseeable by the manufacturer (see Clause 4).
This document is not applicable to hedge trimmers with an engine displacement over 80 cm3, nor is it applicable to hedge trimmers manufactured before the date of its publication.
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.
GB/T 15706-2012 Safety of machinery - General principles for design - Risk assessment and risk reduction (ISO 12100:2010, IDT)
GB/T 16842-2016 Protection of persons and equipment by enclosures - Probe for verification (IEC 61032:1997, IDT)
GB/T 23821-2009 Safety of machinery - Safety distances to prevent hazard zones being reached by upper and lower limbs (ISO 13857:2008, IDT)
ISO 3767-1 Tractors, machinery for agriculture and forestry, powered lawn and garden equipment - Symbols for operator controls and other displays - Part 1 : Common symbols
Note: GB/T 4269.1-2000 Tractors, machinery for agriculture and forestry, powered lawn and garden equipment - Symbols for operator controls and other displays－Part 1:Common symbols (idt ISO 3767-1:1991)
ISO 3767-3 Tractors, machinery for agriculture and forestry, powered lawn and garden equipment - Symbols for operator controls and other displays - Part 3 : Symbols for powered lawn and garden equipment
Note: GB/T 4269.3-2000 Tractors, machinery for agriculture and forestry, powered lawn and garden equipment - Symbols for operator controls and other display - Part 3 : Symbols for powered lawn and garden equipment (idt ISO 3767-3:1995) .
ISO 3767-4 Tractors, machinery for agriculture and forestry, powered lawn and garden equipment - Symbols for operator controls and other displays - Part 4 : Symbols for forestry machinery
Note: GB/T 4269.4-2014 Tractors, machinery for agriculture and forestry, powered lawn and garden equipment - Symbols for operator controls and other displays - Part 4 : Symbols for forestry machinery (ISO 3767-4:1993, IDT)
ISO 3864-2 Graphical symbols - Safety colours and safety signs - Part 2 : Design principles for product safety labels
Note: GB/T 2893.2-2020 Graphical symbols - Safety colours and safety signs - Part 2 : Design principles for product safety labels (ISO 3864-2:2016, MOD)
ISO 7010 Graphical symbols- Safety colours and safety signs - Registered safety signs
Note: GB/T 31523.1-2015 Safety information identification systems - Part 1 : Signs (ISO 7010:2011, MOD)
ISO 11684 Tractors, machinery for agricultural and forestry, powered lawn and garden equipment- Safety signs and hazard pictorials - General principles
Note: GB 10396-2006 Tractors, machinery for agriculture and forestry, powered lawn and garden equipment - Safety signs and hazard pictorials - General principles (ISO 11684:1995, MOD)
ISO 12100 Safety of machinery-General principles for design- Risk assessment and risk reduction
Note: GB/T 15706-2012 Safety of machinery - General principles for design - Risk assessment and risk reduction (ISO 12100:2010, IDT)
ISO 22867 Forestry and gardening machinery - Vibration test code for portable hand-held machines with internal combustion engine - Vibration at the handles
Note: GB/T 5395-2014 Forestry and gardening machinery - Vibration test code for portable hand-held machines with internal combustion engine - Vibration at the handles (ISO 22867 : 2011, IDT)
ISO 22868 Forestry and gardening machinery- Noise test code for portable hand -held machines with-internal combustion engine- Engineering method (Grade 2 accuracy)]
Note: GB/T 5390-2013 Forestry and garden machinery - Noise test code for portable hand-held machines with internal combustion engine - Engineering method (Grade 2 accuracy) (ISO 22868:2011, IDT)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
hedge trimmer
machine fitted with reciprocating blades made of metal, intended to cut and form hedges, bushes and similar vegetation
3.2
cutting device
part of the assembly consisting of cutter blade and shear plate, or of the cutter blades together with any supporting part, which performs the cutting action and that can be single-or double-sided
Note: See Figure 2.
3.3
cutter blade
part of the cutting device having blade teeth which cut by a shearing action either against other blade teeth or against a shear plate
Note: See Figure 2.
3.4
blade tooth
part of the cutter blade which is sharpened to perform the shearing action
Note: See Figure 2.
3.5
cutting length
effective cutting length of the cutting device measured from the inside edge of the first blade tooth or shear plate tooth to the inside edge of the last blade tooth or shear plate tooth
Note 1: See Figure 3.
Note 2: Where both blades move, the measurements are taken when the first and last teeth are furthest apart.
3.6
front handle
handle located at or towards the cutting device
Note: See Figure 1.
3.7
rear handle
handle located furthest from the cutting device
Note: See Figure 1.
3.8
throttle lock
device for temporarily setting the throttle in a partially open position to aid starting
3.9
throttle control lock-out
device which prevents the unintentional activation of the throttle trigger unless the operator releases it
3.10
throttle control
blade control
device activated by the operator's hand or finger for controlling the cutter blade movement
Note: This can require a single or a two-stage operation depending on the application.
3.11
blunt extension
extending blunt part of the cutting device or an extending part of an unsharpened plate fitted to the cutting device to prevent contact with the moving cutter blade
3.12
adjustable handle
handle whose position can be modified either by movement or by rotation
3.13
drive shaft
shaft used to transmit power from the engine to the cutting device
3.14
drive shaft tube
tube which contains the drive shaft and connects the engine to the cutting device
Note: It can be fixed, extendable or telescoping in length. For ease of storage and transportation, the drive shaft tube can be detachable.
3.15
split-boom
design feature which permits the separation of the drive shaft tube for ease of storage and transportation
3.16
dry weight
weight of the unit with empty fuel/oil tank(s)and without cutting device cover
GB/T 42607-2023 Powered hand-held hedge trimmers - Safety
1 Scope
This document specifies safety requirements and measures for the verification of the design and construction of hand-held, integrally-driven combustion engine hedge trimmers (hereafter referred to as “hedge trimmers”) designed to be used by a single operator for trimming hedges and bushes while utilizing one or more linear reciprocating cutter blades.
This document is also applicable to "split-boom" type hedge trimmers and to multi-purpose machines when configured as a hedge trimmer.
It establishes methods for the elimination or reduction of hazards arising from the use of the hedge trimmers. In addition, it specifies the type of information to be provided by the manufacturer on safe working practices.
This document deals with all significant hazards, hazardous situations and events relevant to powered hand-held hedge trimmers when they are used as intended and under the conditions of misuse that are reasonably foreseeable by the manufacturer (see Clause 4).
This document is not applicable to hedge trimmers with an engine displacement over 80 cm3, nor is it applicable to hedge trimmers manufactured before the date of its publication.
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.
GB/T 15706-2012 Safety of machinery - General principles for design - Risk assessment and risk reduction (ISO 12100:2010, IDT)
GB/T 16842-2016 Protection of persons and equipment by enclosures - Probe for verification (IEC 61032:1997, IDT)
GB/T 23821-2009 Safety of machinery - Safety distances to prevent hazard zones being reached by upper and lower limbs (ISO 13857:2008, IDT)
ISO 3767-1 Tractors, machinery for agriculture and forestry, powered lawn and garden equipment - Symbols for operator controls and other displays - Part 1 : Common symbols
Note: GB/T 4269.1-2000 Tractors, machinery for agriculture and forestry, powered lawn and garden equipment - Symbols for operator controls and other displays－Part 1:Common symbols (idt ISO 3767-1:1991)
ISO 3767-3 Tractors, machinery for agriculture and forestry, powered lawn and garden equipment - Symbols for operator controls and other displays - Part 3 : Symbols for powered lawn and garden equipment
Note: GB/T 4269.3-2000 Tractors, machinery for agriculture and forestry, powered lawn and garden equipment - Symbols for operator controls and other display - Part 3 : Symbols for powered lawn and garden equipment (idt ISO 3767-3:1995) .
ISO 3767-4 Tractors, machinery for agriculture and forestry, powered lawn and garden equipment - Symbols for operator controls and other displays - Part 4 : Symbols for forestry machinery
Note: GB/T 4269.4-2014 Tractors, machinery for agriculture and forestry, powered lawn and garden equipment - Symbols for operator controls and other displays - Part 4 : Symbols for forestry machinery (ISO 3767-4:1993, IDT)
ISO 3864-2 Graphical symbols - Safety colours and safety signs - Part 2 : Design principles for product safety labels
Note: GB/T 2893.2-2020 Graphical symbols - Safety colours and safety signs - Part 2 : Design principles for product safety labels (ISO 3864-2:2016, MOD)
ISO 7010 Graphical symbols- Safety colours and safety signs - Registered safety signs
Note: GB/T 31523.1-2015 Safety information identification systems - Part 1 : Signs (ISO 7010:2011, MOD)
ISO 11684 Tractors, machinery for agricultural and forestry, powered lawn and garden equipment- Safety signs and hazard pictorials - General principles
Note: GB 10396-2006 Tractors, machinery for agriculture and forestry, powered lawn and garden equipment - Safety signs and hazard pictorials - General principles (ISO 11684:1995, MOD)
ISO 12100 Safety of machinery-General principles for design- Risk assessment and risk reduction
Note: GB/T 15706-2012 Safety of machinery - General principles for design - Risk assessment and risk reduction (ISO 12100:2010, IDT)
ISO 22867 Forestry and gardening machinery - Vibration test code for portable hand-held machines with internal combustion engine - Vibration at the handles
Note: GB/T 5395-2014 Forestry and gardening machinery - Vibration test code for portable hand-held machines with internal combustion engine - Vibration at the handles (ISO 22867 : 2011, IDT)
ISO 22868 Forestry and gardening machinery- Noise test code for portable hand -held machines with-internal combustion engine- Engineering method (Grade 2 accuracy)]
Note: GB/T 5390-2013 Forestry and garden machinery - Noise test code for portable hand-held machines with internal combustion engine - Engineering method (Grade 2 accuracy) (ISO 22868:2011, IDT)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
hedge trimmer
machine fitted with reciprocating blades made of metal, intended to cut and form hedges, bushes and similar vegetation
3.2
cutting device
part of the assembly consisting of cutter blade and shear plate, or of the cutter blades together with any supporting part, which performs the cutting action and that can be single-or double-sided
Note: See Figure 2.
3.3
cutter blade
part of the cutting device having blade teeth which cut by a shearing action either against other blade teeth or against a shear plate
Note: See Figure 2.
3.4
blade tooth
part of the cutter blade which is sharpened to perform the shearing action
Note: See Figure 2.
3.5
cutting length
effective cutting length of the cutting device measured from the inside edge of the first blade tooth or shear plate tooth to the inside edge of the last blade tooth or shear plate tooth
Note 1: See Figure 3.
Note 2: Where both blades move, the measurements are taken when the first and last teeth are furthest apart.
3.6
front handle
handle located at or towards the cutting device
Note: See Figure 1.
3.7
rear handle
handle located furthest from the cutting device
Note: See Figure 1.
3.8
throttle lock
device for temporarily setting the throttle in a partially open position to aid starting
3.9
throttle control lock-out
device which prevents the unintentional activation of the throttle trigger unless the operator releases it
3.10
throttle control
blade control
device activated by the operator's hand or finger for controlling the cutter blade movement
Note: This can require a single or a two-stage operation depending on the application.
3.11
blunt extension
extending blunt part of the cutting device or an extending part of an unsharpened plate fitted to the cutting device to prevent contact with the moving cutter blade
3.12
adjustable handle
handle whose position can be modified either by movement or by rotation
3.13
drive shaft
shaft used to transmit power from the engine to the cutting device
3.14
drive shaft tube
tube which contains the drive shaft and connects the engine to the cutting device
Note: It can be fixed, extendable or telescoping in length. For ease of storage and transportation, the drive shaft tube can be detachable.
3.15
split-boom
design feature which permits the separation of the drive shaft tube for ease of storage and transportation
3.16
dry weight
weight of the unit with empty fuel/oil tank(s)and without cutting device cover
