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Primerjava obremenitve sekača s tresenjem pri sečnji živih in suhih smrekovih dreves
Koren, Nejc (Author), Poje, Anton (Mentor) More about this mentor... This link opens in a new window

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Abstract
V diplomski nalogi želimo odgovoriti na vprašanje, ali sečnja in izdelava pri suhih smrekovih drevesih povzroča večjo obremenitev sekača s tresenjem rok in dlani v primerjavi s sečnjo in izdelavo pri živih smrekovih drevesih. Raziskava je potekala na območju Ljubljanskega vrha, v GGE Bistra-Borovnica, GGO Ljubljana. V raziskavo smo zajeli 10 smrekovih dreves, od tega 5 suhih, zaradi žleda in podlubnikov poškodovanih dreves in 5 živih dreves. Vseh 10 dreves je posekal isti sekač v enem delovnem dnevu. Obremenitev sekača se je ugotavljala na vodilnem ročaju motorne žage Husqvarna 562 XP. Rezultati so pokazali, da so povprečne obremenitve med glavnim produktivnim časom značilno manjše pri obdelavi živih dreves (4,36 m/s2) kot pri obdelavi suhih dreves (4,87 m/s2), vendar to ne velja za vsako posamezno delovno operacijo. Za zmanjšanje obremenitev s tresenjem je poleg nekaterih tehničnih ukrepov treba rezultate raziskave upoštevati predvsem pri organizaciji dela na sečiščih z veliko koncentracijo suhega lesa.

Language:Slovenian
Keywords:sečnja, obremenitev s tresenjem, suha smrekova drevesa, živa smrekova drevesa, ergonomija
Work type:Bachelor thesis/paper (mb11)
Organization:BF - Biotechnical Faculty
Year:2018
COBISS.SI-ID:5190822 Link is opened in a new window
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Downloads:202
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Secondary language

Language:English
Title:Lumberman vibration exposure during cutting of fresh and dry spruce trees
Abstract:
The purpose of graduation thesis was to answer the question whether the cutting and processing of dry spruce trees presents higher exposure of lumberman’s arms to vibrations when compared to fresh spruce trees. The survey was conducted in the area of hill Ljubljanski vrh in GGE Bistra-Borovnica, GGO Ljubljana. In the survey 10 spruce trees was covered, 5 of those damaged by ice storm and bark beetles, and 5 fresh trees. All 10 trees were processed by the same lumberman in the same day. Lumberman exposure was determined on the rear handle of chainsaw Husqvarna 562 XP. The results have shown, that the vibrations loads were smaller during processing of fresh spruce trees (4,36 m/s2) than during working with dry trees (4,87 m/s2). Therefore, the differences are statistically significant, but the difference cannot be clearly visible when comparing each individual work operation. In addition to applying technical measures, in order to reduce vibration load on forestry workers, the results of the research should be considered particularly when organising work on salvage logging worksites containing a high concentration of dry wood.

Keywords:wood cutting, vibration exposure, dry spruce trees, fresh spruce trees, ergonomics

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