Coupling forces exerted on chain saws by inexperienced tree fellers

Malinowska-Borowska, Jolanta; Zieliński, Grzegorz

doi:10.1016/j.ergon.2013.04.006

Cited by 13 publications

(7 citation statements)

References 18 publications

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“…Additionally, the measured vibration level is also influenced by the operator experience: inexperienced subjects have been found to operate the beater pole using stronger grip forces (Costa et al, 2013), which implies lower measured accelerations. The same trend has been observed for chainsaws by Malinowska-Borowska et al (2013), who found that higher coupling forces were exerted by inexperienced tree fellers.…”

Section: Cluster Analysissupporting

confidence: 81%

A round robin test for the hand-transmitted vibration from an olive harvester

Lenzuni

Deboli

Preti

et al. 2016

International Journal of Industrial Ergonomics

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In this paper we present the outcome of a Round Robin test carried out to validate a proposed standard procedure to measure the acceleration produced by an hand held olive harvester. Ten independent laboratories using a custom-built device were involved. The device was developed to simulate olive tree branches as far as their interaction with the harvester sticks is concerned. Collected data were analysed according to the ISO 5725-2 procedure. Accelerations measured in three of the ten laboratories were found by a cluster analysis to be statistically different from those of the remaining seven laboratories. Based on this evidence, results from the three stray laboratories were eliminated from the final sample. Laboratory data were shown to be statistically consistent with field data in the dominant front and rear X axes as well as in the rear Z axis. No statistically significant discrepancy were found for the front and the rear acceleration vector sums, which are the quantities used to quantify the occupational exposure. The procedure developed in this Round Robin test could represent a viable basis for a future test standard for hand-held olive harvesters.

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Section: Cluster Analysissupporting

confidence: 81%

A round robin test for the hand-transmitted vibration from an olive harvester

Lenzuni

Deboli

Preti

et al. 2016

International Journal of Industrial Ergonomics

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“…Portable chainsaws create substantial injury risk [ 1 ] particularly for inexperienced users. [ 2 ] Each year over 3 million new chainsaws are sold in the USA. The operation of chainsaws results in over 28,000 chainsaw-related injures annually.…”

Section: Introductionmentioning

confidence: 99%

Kickback risk of portable chainsaws while cutting wood of different properties: laboratory tests and deductions

Dąbrowski

2015

International Journal of Occupational Safety and Ergonomics

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Portable chainsaws are associated with substantial risk and can cause serious injury to operators, especially during kickback. This paper presents new results from research and analyses conducted regarding the impact between the different properties of wood on this occurrence. In an open area, such differences may include: wood species, humidity, temperature and the facing angle of the wood fibres in relation to the kerf and shape of the wood surface that comes in contact with the tip of the guide bar. This paper investigates chainsaw kickback including the research results on kickback and wood-cutting energy, saw chain speed and the efficiency of the chainsaw engine. It also presents conclusions drawn from the tests that can be useful for chainsaw users, showing the dependencies between the different properties of wood and the risk of injury.

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“…In general, higher coupling forces lead to a higher transmission of the vibrations to the hand-arm system, and therefore techniques and work tools that require lower coupling forces are preferred [57]. Especially amateurs, however, tend to exert higher coupling forces compared to professionals [14], and thereby are more prone to the risks caused by the chainsaw's vibrations. An attempt to consider the coupling forces, when regarding the vibration exposure, is to adjust the vibration exposure by a given factor, which depends on the exerted coupling force [58].…”

Section: Vibration Exposurementioning

confidence: 99%

Vibration and Noise Exposure during Pre-Commercial Thinning Operations: What Are the Ergonomic Benefits of the Latest Generation Professional-Grade Battery-Powered Chainsaws?

Huber

Hoffmann

Brieger

et al. 2021

Forests

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In order to compare the vibration and noise exposure of STIHL’s battery-powered MSA 220 C and the combustion driven MS 201 C, a professional operator was monitored during a pre-commercial thinning operation in a twenty-year-old hardwood stand. The vibration levels were measured with a tri-axial accelerometer on the front and rear handle of both the chainsaws, and assigned to five different work elements using a video documentation. Additionally, noise levels were recorded in one-minute intervals, with a dosemeter worn by the operator. The results show that battery-powered chainsaws, when compared to combustion-driven chainsaws, can reduce the daily vibration exposure by more than 45% and the noise dose by about 78.4%, during pre-commercial thinning tasks. Replacing combustion-driven chainsaws with battery-powered ones is therefore generally recommended, to reduce occupational health risks for operators, in this respect. However, the daily vibration exposure of about 2.42 m/s2, caused by the battery-powered chainsaw on the front handle, is still very close to the daily exposure action value set by the EU directives for health and safety requirements. The daily noise exposure of 89.18 dB(A) even exceeds the upper exposure action value. Consequently, a further reduction in the vibration exposure during work is desirable. With respect to noise exposure, additional measures must be implemented for conformity with the current safety standards, making the use of hearing protectors mandatory for electric chainsaws, too.

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Coupling forces exerted on chain saws by inexperienced tree fellers

Cited by 13 publications

References 18 publications

A round robin test for the hand-transmitted vibration from an olive harvester

A round robin test for the hand-transmitted vibration from an olive harvester

Kickback risk of portable chainsaws while cutting wood of different properties: laboratory tests and deductions

Vibration and Noise Exposure during Pre-Commercial Thinning Operations: What Are the Ergonomic Benefits of the Latest Generation Professional-Grade Battery-Powered Chainsaws?

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