Woodworking – Special-work machine
Patent
1984-05-29
1986-06-10
Husar, Francis S.
Woodworking
Special-work machine
144 3D, 144343, B27L 100
Patent
active
045937320
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a method and an installation for processing trees in a terminal landing.
In modern forestry it is common practice to process felled trees in a greater or less degree in terminal landings. Thus, unlimbed trees, which may or may not be topped, are transported to a terminal landing and processed there. In any event, the processing there comprises delimbing the trees and transversely cutting the stems to logs, but other processing steps may also be carried out, such as chipping of a portion of the tree and debarking and lengthwise sawing of a different portion. The processing in the terminal landing need not comprise delimbing and thus may be carried out on stems, that is, trees which have already been delimbed. In this specification, no distinction is made between trees and stems so that the term "tree", as used in this specification, may mean both an unlimbed tree , i.e., a tree that has not been delimbed, and a delimbed tree, that is, a stem. The term "log" as used herein denotes a piece of merchantable timber resulting from the processing of a delimbed tree.
Existing off-road processors are used for delimbing felled trees and cutting them to logs at or near the felling site. Such machines are not suited for processing trees in terminal landings, where the transverse cutting must be carried out within close tolerances of length--the length of the logs should not deviate from the nominal length by more than a few centimetres--and where it must be possible to sort the logs and transport them in parallelized and unidirectionalized condition to an assortment storage.
An object of the invention is to provide a method and a system meeting the above-mentioned requirements. According to the invention, this object is achieved with the method and the installation defined in the claims.
The invention is described in greater detail below with reference to the accompanying drawings.
FIG. 1 is a diagrammatic plan view of a processing installation embodying the invention;
FIG. 2 is a diagrammatic end view of a processing unit with an associated track and with an associated log receiving bed, both forming part of the processing installation;
FIG. 3 is a plan view of the processing unit shown in FIG. 2;
FIG. 4 is an elevational view of the processing unit shown in FIG. 3.
The installation diagrammatically shown in FIG. 1 comprises a storage 11 for unlimbed or delimbed trees 12 to be processed. Advantageously, the trees 12 in the storage are sorted so that trees suitable for a certain end use or a certain customer are stored separately. The trees are parallelized and advantageously unidirectionalized such that their butt ends are adjacent the track of the processing unit to be described.
Moreover, the system comprises a railway track 13 running along the storage 11 transversely of the longitudinal direction of the trees 12, and a processing unit 14 movable on wheels along the track and used for processing the trees into logs. On the side of the track 13 remote from the storage 11 there is a log receiving bed 15 which is elongated in the direction of the track and onto which the logs resulting from the processing operation drop. On its side adjacent the track, the log receiving bed 15 has a horizontal conveyor 16 forwarding the logs received by the bed to a sorting installation 17.
The track 13 is supported by a concrete foundation 19 which also forms a foundation for the log receiving bed 15 and its log conveyor 16.
The processing unit 14 is supported on the track 13 by four wheels 20, at least two of which are driven by a hydraulic motor, and comprises a substantially square horizontal platform 21. At one corner of the platform an operator's cabin 22 is provided from which an operator controls and monitors the system. Adjacent the operator's cabin a hydraulic loading crane 23 of the folding arm type is provided by means of which the operator can pick trees one by one from the storage 11 and bring them to the processing unit with the butt end foremost. Moreover, the processing unit 14 includes a pro
REFERENCES:
patent: 4148344 (1979-04-01), Critchell et al.
Griffin Jorji M.
Husar Francis S.
S O Eriksson Maskin AB
LandOfFree
Method and installation for processing trees in a terminal landi does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and installation for processing trees in a terminal landi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and installation for processing trees in a terminal landi will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2402995