Woodworking – Bark rosser – Tree climber
Patent
1984-10-04
1986-09-02
Bray, W. D.
Woodworking
Bark rosser
Tree climber
144340, B27L 300
Patent
active
046090215
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a log barker or de-barker which operates with jets of water.
BACKGROUND
Previously disclosed are de-barking arrangements for logs in which the barking operation is performed with the help of one or more jets of pressurized water. A considerable water pressure is needed if the desired barking effect is to be achieved. In these previously disclosed arrangements use has been made for this purpose of some form of hydraulic pump by means of which the water was pumped through pipes to one or more nozzles from which jets of water were directed onto the object from which it was wished to remove the bark.
TECHNICAL PROBLEM
Considerable losses have been found to occur in a barking arrangement of this construction, as the result of which very high power was required for the pumping operation if an acceptable barking result was to be achieved within a reasonable time. Furthermore, an arrangement of this kind has also been found to be associated with high assembly costs, since it consists of a hydraulic pump, separate assemblies for the spraying and handling of the logs, and equipment to connect together these two parts.
THE SOLUTION
The application of the present invention has resulted in a barking arrangement which operates with water jets, in which the necessary hydraulic pump has been integrated with the spraying and handling equipment for the logs, thereby achieving the smallest possible losses in the production of the pressurized water.
ADVANTAGES
The present invention makes it possible to simplify the arrangement in relation to previously disclosed barking arrangements by being able to produce the pressurized water directly inside the barking arrangement.
BRIEF DESCRIPTION OF THE DRAWINGS
Illustrated in the accompanying drawings is an embodiment of the invention.
FIG. 1 shows a side view of a barking arrangement in accordance with the invention;
FIG. 2 shows a partially sectioned front view of the arrangement in accordance with the invention;
FIG. 3 shows a central section through the main part of the barking arrangement; and
FIG. 4 shows a detail of FIG. 3.
BEST MODE OF CARRYING OUT THE INVENTION
Attached to a base 1 as shown in FIG. 1 are on the one hand an input housing 2 and on the other hand a frame 3 supporting the mechanical equipment of the barking arrangement, for which the reference designation 4 is used. The input housing 2 is connected to transport means 5 for the logs 6 which are to be fed into the barking arrangement. The transport means 5 may be of conventional type and will not, therefore, be described in any greater detail here. They must, however, be designed to feed the logs 6 from which the bark is to be removed one after the other from an input channel. The transport means 5 shall be of the so-called self-centering type and shall thus feed the logs 6 into such a position that the centre-line of the different logs will lie in essentially the same position in relation to the barking arrangement irrespective of the size of the logs. Previously disclosed transport means of this kind operate with chains moving horizontally for the purpose of transporting the logs, said chains being shown in FIG. 1 to be both superjacent and subjacent chains which are so arranged as to centralize the logs in relation to each other, either with the help of a system of links or by the positive positioning of the logs under the control of an assembly which measures the thickness of the logs.
The bark which has been removed will be ejected from inside the input housing and is able to fall through a lower opening 7 in the housing 2 and down onto a conveyor belt 8 so arranged as to carry the bark to a dump. Such arrangements, too, have been previously disclosed and do not, therefore, require more detailed description. As may be appreciated from FIG. 1, the housing 2 projects through the base 1 so as to permit the aforementioned connection with the conveyor belt 8 to be achieved. The housing 2 is supported by the base 1 by means of a shock-absorbing rubb
REFERENCES:
patent: 2453947 (1948-11-01), Swift
patent: 2463084 (1949-03-01), Bukowsky
patent: 2542371 (1951-02-01), Swift et al.
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