Woodworking – Special-work machine – Tree felling
Patent
1995-05-02
1996-10-15
Bray, W. Donald
Woodworking
Special-work machine
Tree felling
301234, 118 40, 118 41, 401137, 427289, 144336, 144380, 144 48, A01G 2308, B05C 1100
Patent
active
055644848
DESCRIPTION:
BRIEF SUMMARY
The object of this invention is a colour-marking arrangement in the cutting flange of a timber harvester, which arrangement includes pipework adapted to the flange with the flange carrier, a channel network formed to the carrier and connected to the pipework, which ends at the connections opposite the pipework, and which flange shall be set on the carrier essentially to be able to move longitudinally.
The spraying of liquids through the flange onto a cut tree or especially the stump has been in practice in Finland for several years. As liquids, use is made of urea in the treatment of stumps and colour substances in the separation and recognition of logs. Suitable flanges for the urea treatment have been available, but colour-marking flanges have only now during the past year been on market trials. The main problem in colour-marking flanges has been their one-handedness i.e. it is only possible to wear one side of the flange. This hats increased operating costs. It is true that a method is known for making two-handed flanges by machining grooves to a separate pipework on the outer surfaces on both sides of the flange. A chain wears the flange in such a way that the depth of the groove diminishes on the loaded side.
The intention of the invention is to create a colour-marking arrangement in a flange, in which there would be either simultaneously a colour and urea spraying possibility, or only one or the other of these operations. The flange should be two-handed, so that both sides of it can be worn. The characteristic features of the invention are presented in the accompanying Patent claims.
It is advantageous to manufacture a liquid-spraying flange in accordance with the invention from two parts. Flanges manufactured from one part are also known. Nowadays the vast majority of flanges are manufactured from three parts. The advantages in comparison to flanges manufactured from a single part are simpler construction and due to that a lower price. The disadvantage is lower strength compared to a one-part flange.
In addition, in a flange in accordance with the invention it is easy to prevent leaks in the transfer of liquids from the frame component of the carrier to the flange. This is because the end piece of the pipework that moves freely inside the flange can be located in the frame component. Also the delivery of liquid to the end piece of the pipework can be made from either side of the flange. In new machines it is advantageous to bring the liquid through the frame component that carries the flange. In retro-fitting it may be more advantageous to bring the liquid through the component that tightens the flange.
Most advantageously the flange is thus manufactured from at least two components, in which case the intention is to create a space for the pipework longitudinally in the centre of the flange in its interior section. The space required by the pipework depends on the number of pipes. Through openings are provided in the flange from its space for the pipework. Through these openings, liquid is able to be sprayed from holes in the sides of the pipes. The space extends in the longitudinal direction a little beyond the final opening and the ends of the pipes are plugged. In general, two pipes are required for colour-marking and one pipe for urea. When spraying urea there must be several spray-holes and through openings in the flange.
In what follows the invention is illustrated by reference to the accompanying Figures, which show various colour-marking arrangements in accordance with the invention.
FIG. 1 is a side view of a flange without the pipework.
FIG. 2 is a cross-sectional view from the line 2--2 of FIG. 1, with the pipework shown.
FIG. 2a is an enlargement of the circled portion of FIG. 2.
FIG. 3 is a partially assembled side view showing the pipework assembled to the frame of the carrier and partially installed in the flange but before the full installation of the flange on the carrier.
FIG. 4 is a partial enlargement of a portion of the flange of FIG. 1 as assembly with the carrier and associate
REFERENCES:
patent: 4169173 (1979-09-01), Bergholm et al.
patent: 5143131 (1992-09-01), Seigneur et al.
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