Ex Student Archive

Home About Browse Advanced Search

Näsström, Simon (2007) Virkesgripen, ett geometriskt verktyg. Other thesis, SLU.

Full text available as:

Download (260kB) | Preview


The aim of this study was to investigate and describe conceptions that been used when people talks about grapples and to put together parameters that the customers sees as important when they chose a grapple from Hultdins. Every year Hultdins manufacturer and sells about 3500 grapples around the world. With so many users its difficult to oblige everyone. To get an apprehension of what kind of grapple the operators wanted a formula with 18 questions was made. For the interviews 20 forestmachineoperators were choicest who had experience from Hultdins grapples, a lot of them also had experience from other grappleproducers and constructions. The study showed that it is the durability the users give priority to. A lot of operators use the grapple to move stones, stumps, etc. to get an even and faster main haul road. That is a big problem because the grapple is not made for that kind of use and the life is reduced. The operators were asked about the grapples qualities during work with timber. Many operators thought that the qualities would improve if the grapple claws were made rounder and wider. If the grapples claws were rounder they also thought that the grapple should get much less stones, moss and soil with it when the grapple is closed to pick up logs from the ground. Other qualities and factors like color and long lubrication intervals, etc. weren't anything the operators cared about. Out on the market Hultdins is well known for all the robust and simple products they designed. During year 2006 Hultdins introduce a further development of the SuperGrip, SuperGrip 2. The construction is a bit different from the previous SuperGrip, the grapples claws is made rounder and also wider even the construction is more vigorous. They also developed an extra size of grapple that operators who perform forwarding both in thinning and final felling will appreciate. The conclusion of this report is that Hultdins made the right decisions when they developed Super Grip 2.

Item Type: Thesis (Other)
Keywords: Hållbarhet, egenskaper, konstruktion, livslängd
Subject (faculty): Faculty of Veterinary Medicine and Animal Science > Dept. of Forest Ecology and Management
Divisions: SLU > Faculty of Forest Sciences
Depositing User: Ylva Jonsson
Date Deposited: 21 Aug 2007
Last Modified: 18 Aug 2015 09:53
URI: http://ex-epsilon.slu.se/id/eprint/1818

Actions (login required)

View Item View Item


Downloads per year since May 2015

View more statistics