Woodworking – Bark rosser – Hand tool
Patent
1997-08-01
1999-02-23
Bray, W. Donald
Woodworking
Bark rosser
Hand tool
1442081, 144341, 384549, 241178, B27L 100
Patent
active
058733981
DESCRIPTION:
BRIEF SUMMARY
This application is the national phase of international application PCT/SE95/01400, filed Nov. 23, 1995 which designated the U.S.
BACKGROUND OF THE INVENTION
This invention relates to a device in a barking unit, which comprises a barking drum which is placed on two bogies, positioned at a distance from each other, each bogie comprising a travelling wheel and a driving wheel, positioned at a distance from each other along the periphery of the barking drum, and being arranged in a foundation. (The purpose of a barking unit is to remove bark from logs or other pieces of wood having adhering bark. Sometimes the process involved is called "debarking", in which case the device can be called a debarking device.
This type of barking unit is previously known. The problem with known constructions has been the fastening of the bogies to the foundation and has resulted in operational disturbances in the barking unit.
SUMMARY OF THE INVENTION
This invention intends to remove the problems with known constructions and to provide a technical solution allowing the barking unit to be driven in a reliable way. This has been made possible by a device of the kind mentioned by way of introduction, which is characterized by the combination of the following features: elements; distance from each other, the intermediate cushion being more rigid than the two outer cushions; and which is arranged between the bogie and the fundament.
BRIEF DESCRIPTION OF THE DRAWING
A preferred embodiment of the invention shall be described more closely below with reference to the accompanying drawing, in which:
FIG. 1 shows a barking drum, placed on two bogies, both of which are arranged in one and the same foundation.
FIG. 2 shows the device according to the invention for fastening each one of the bogies to the foundation.
FIG. 3 shows the linear movement of the bogie.
DETAILED DESCRIPTION
With reference to FIG. 1, the is shown there a barking drum which is an integral part of a barking unit, which drum is provided with a jacket surface 2 and is placed on two bogies 3, 4, which are arranged at a distance from each other in the circumferential direction of the drum. Each bogie comprises a travelling wheel 5 and a driving wheel 6, which are arranged at a distance from each other in the circumferential direction of the drum, and of which each one is rotatably arranged on a center axle 7, 8. These center axles 7, 8 have a direction which is substantially parallel with the longitudinal direction of the jacket surface 2 of the barking drum 1.
Each bogie is fastened to a foundation 9. According to the invention each bogie is resiliently arranged in the foundation by means of a device 10 which comprises elastic elements 11-13.
The device 10 comprises a frame 14, having a plane portion 15 directed towards the foundation 9, which portion is fastened to the foundation by means of bolts 16-18. The frame has further another plane portion 19, which has such a direction that the portion 19 is angled in relation to the portion 15 by about 30.degree.. The portion 19 has a direction which is substantially parallel with a line 20, connecting the axle center 7 of the travelling wheel 5 with the center 8 of the driving wheel 6, all of the some device 10.
Each device 10, as has been mentioned previously, comprises elastic elements 11-13, which are three in number and are made of rubber and/or plastic. These three elements comprise three cushions, which are arranged at a distance from each other between the upper, plane portion 19 of the frame 10 and a plate arrangement 21. In this connection, the intermediate element 12 is more rigid than the two outer elements 11, 13, which preferably are substantially of equal rigidity. Furthermore, the distance between the intermediate element 12 and each respective outer element 11, 13 is substantially the same. This plate arrangement comprises a flexible, elongated plate 22, which is fastened to the bogie. The one end 23 of the plate 22 is in a suitable way fastened to a plate-like means 24, which is intended to be in c
REFERENCES:
patent: 2858177 (1958-10-01), Birdsall
patent: 3262477 (1966-07-01), O'Brien
patent: 4232374 (1980-11-01), Kiriazdros
patent: 4596280 (1986-06-01), Svensson
patent: 5247978 (1993-09-01), Silenius et al.
BMH Wood Technology AB
Bray W. Donald
LandOfFree
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