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 fundament.

This type of barking unit is previously known. The problem with known technique has been the fastening of the bogie to the fundament and has resulted in operational disturbances in the barking unit.

This invention intends to remove the problems with known technique 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 charac¬ terized by the combination of the following features:

- The bogie is resiliently arranged in the fundament by means of elastic elements;

- The elastic elements comprise three cushions, positioned beside and at a distance from each other, the intermediate cushion being more rigid than the two outer cushions;

- The elastic elements are intended to cooperate with a plate arrangement, which is arranged between the bogie and the fundament.

A preferred embodiment of the invention shall be described more closely below with reference to the accompanying drawing, where fig. 1 shows a barking drum, placed on two bogies, both of which are arranged in one and the same fundament, and fig. 2 shows the device according to the invention for fastening each one of the bogies to the fundament.

With reference to fig. 1 is shown there a barking drum being 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. Each bogie comprises a travelling wheel 5 and a driving wheel 6, which are arranged at a distance from each other, and of which each one is rotatably arranged on a centre axle 7, 8. These centre axles 7, 8 have a direction which is essentially parallel with the longitudinal direction of the jacket surface 2 of the barking drum 1.

Each bogie is fastened to a fundament 9. According to the invention the bogie is resiliently arranged in the fundament 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

fundament 9, which portion is fastened to the fundament 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 about 30 ^* . The portion 19 shall have a direction which is essentially parallel with a line 20, connecting the axle centre 7 of the travelling wheel 5 with the centre 8 of the driving wheel 6.

The 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 essentially of equal rigidity. Furthermore, the distance between the intermediate element 12 and respective outer element 11, 13 is essentially 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 contact with the topside of the three elastic elements 11 - 13. This means 24 is provided with two plate means 25, 26, which project downwards and are arranged on each side of each element 11 - 13, whereby these ones are kept in place.

The other end 27 of the elongated plate 22 is fastened to the frame 14 and more exactly to a part 28, which projects upwards from the upper plane portion 19 of the frame, and which is arranged essentially vertical against the portion 19 at the very end of this one.

Due to the mentioned design of the three elastic elements 11- 13, the positioning of these ones and the design of the plate arrangement 21, it is made possible for the bogie 3,

4 to carry out three different movements, namely partly a linear movement 29 in a direction which is essentially vertical against the line 20, connecting the axle centres 7, 8 of the travelling wheel 5 and the driving wheel 6, partly a tilting movement 30 about an axis, having a direction which is essentially perpendicular to the mentioned line 20 and essentially parallel with the longitudinal jacket surface of the barking drum 1, and finally a tilting movement 31 about an axis having a direction which is essentially parallel with the mentioned line 20. In this specific case the mentioned axes go through the intermediate, elastic element 12. Due to the fact that the bogie accordingly can be allowed to make these movements, the detrimental effects on the bogies are reduced, which otherwise could be the result of the high loads caused by the barking drum when rotating during work.

The invention is of course not limited to the described and shown embodiment but can be modified within the scope of the following claims.