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Forces Required for Pulling Out a Winch Steel Cable and Physical Load of Choker-Man


Pandur, Zdravko; Horvat, Dubravko; Šušnjar, Marijan; Zorić Marko; Hat, Zoran
Forces Required for Pulling Out a Winch Steel Cable and Physical Load of Choker-Man // Formec Croatia 2012, Forest Engineering: Concern, Knowledge and Accountability in Today`s Environment / Pentek, Tibor ; Poršinsky, Tomislav ; Šporčić, Mario (ur.).
Zagreb: Šumarski Fakultet Zagreb, 2012. (predavanje, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)


Naslov
Forces Required for Pulling Out a Winch Steel Cable and Physical Load of Choker-Man

Autori
Pandur, Zdravko ; Horvat, Dubravko ; Šušnjar, Marijan ; Zorić Marko ; Hat, Zoran

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Formec Croatia 2012, Forest Engineering: Concern, Knowledge and Accountability in Today`s Environment / Pentek, Tibor ; Poršinsky, Tomislav ; Šporčić, Mario - Zagreb : Šumarski Fakultet Zagreb, 2012

ISBN
978-953-292-025--3

Skup
Forest Engineering: Concern, Knowledge and Accountability in Today`s Environment

Mjesto i datum
Dubrovnik (Cavtat), Hrvatska, 8-12.10.2012

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Steel cable; forest winch; choker man; pulling forces; physical load

Sažetak
The forces required for pulling out a winch steel cable are essential for evaluating the effect on physical load of choker man. The following parameters have the greatest impact on the size of these forces: diameter and unit weight of steel cable, resistance forces in the winch that occur due to friction in the drum bearings, improper adjustment of winch brake and clutch and also the terrain slope where the rope is pulled. This paper presents the results of in situ measurements: • pulling force of steel cable, • velocity of steel cable pulling, • power consumed in pulling, carried out on a Hittner 2 x 80 winch mounted on a skidder Ecotrac 120V. Changes of measurement values are analyzed as a function of: • length of the pulled steel cable, and • terrain slope (5 different inclinations ranging between -19 ˚ and +19 ˚). Based on the research results, physical load of choker-man is classified as work under heavy load according to the Directive 90/269/EEC, including the possibility of excessive work loading of healthy workers. During this evaluation, due to specific conditions in the forest, it has been observed that the assessment of physical load of choker-man is not satisfactory according to the applicable regulations.

Izvorni jezik
Engleski

Znanstvena područja
Šumarstvo



POVEZANOST RADA


Projekt / tema
068-0000000-3520 - Međudjelovanje parametara podloge i kotača šumskih vozila (Dragutin Pičman, )
068-0682111-2112 - Ekološko, energijsko i ergonomsko vrednovanje šumskih strojeva i opreme (Dubravko Horvat, )

Ustanove
Šumarski fakultet, Zagreb