DE1121795B - Machine for debarking logs - Google Patents

Description

GERMAN

PATENT OFFICE

St7371Ic / 38i

REGISTRATION DATE: NOVEMBER 25, 1953

NOTIFICATION OF THE REGISTRATION AND ISSUE OF THE
EDITORIAL: 11th JA NUA R 1962

The debarking of tree trunks and trunk sections has so far been carried out in the forest and in storage areas Machines using exclusively manual labor, cutting tools are because of the large wood loss impossible. An easily transportable machine is particularly desirable who debark the wood soon after it has been felled everywhere in the forest and in forest storage areas can if the bark is still relatively easy to separate from the wood and the difference in strength in wood and bark is as large as possible.

A number of different constructions have already been tried to debark with a blunt hitting tools. Chain ends or chain loops or attached to wire ropes or chains Blunt impact bodies strike from one or more sides on the rotating or spiraling advancing body Tribe. To avoid damage to the wood, the striking tools should either can only hit the bark and not the wood surface, or their impact should be regulated in this way be that only the bark and not the wood can be smashed.

These beating machines have not acquired any practical significance because they are tolerable Expenditure on auxiliary equipment is not possible, the natural irregularities of the trunks to take into account somewhat according to shape and strength and a larger part of the wood surface edit at the same time.

Whether they strike along or across the trunk or with ropes, chains or rigid levers as tool carriers, hit the individual striking tools in all known constructions among the most diverse Conditions on the bark and wood surface, so that the specific Surface pressures at the individual impact points fluctuate by several 100% and with it all possibilities the wood damage is present until the bark remains on.

A known machine for debarking tree trunks causes the bark to be loosened by means of Knocking of a tool. The bark is peeled off, divided and scraped off the trunk. That rotating gear-like tool is moved back and forth on the wood in the longitudinal axis, with the Teeth exert the knocking effect and division and the tool continues to rotate in the same sense scrapes off the detached parts of the bark as it recedes.

Another well-known tool for debarking wood causes because of its line-shaped touch machine for debarking logs

Applicant:

Hermann Stüve,
Opperhausen via Kreiensen, 117

Hermann Stüve, Opperhausen via Kreiensen,

and Heinrich Stüve,

Bartelshagen via Ribnitz-Damgarten,

have been named as inventors

possibilities with the wood very large specific pressures and friction and leads in the direction of impact the longitudinal fibers of the wood and due to the natural irregularities of the trunk Damage to the wood.

In a known tree trunk barking machine, a blunt tool with a smaller one Diameter used as that of the trunk to be debarked. The movement is longitudinal and transverse to the Trunk, and a gas cylinder is used to keep the tool on the trunk at all times. Even With this machine, the large specific possibilities are due to the line-shaped contact possibilities Pressures and friction inevitably cause wood damage. The above-mentioned effect of the invention will not be reached.

There is also a milling head known for peeling bath and bark on round wood, the milling knife They are shaped like a saw blade and can move axially and are self-actuated by spring pressure or centrifugal force place on the peeled material. A stop is used to prevent tangential action To ensure »milling« on the wood surface and to prevent a perpendicular impact, whereas the stop in the invention is provided precisely around the blunt impact tool to lead with certainty perpendicular to the bark.

All known machines that work with striking tools only achieve a very primitive one Wear effect on the bark without having a specific part of the bark in full strength Beat to be able to remove. With the consistently acute-angled impact of the tools on the

109 759/112

The trunk surface cannot be debarked from concave areas.

The machine according to the invention, in which to Debarking from round wood a relative movement of the tool and round wood to one another takes place, whereby the tools have a blunt wedge shape with a limited striking surface and are timed at regular intervals Penetrating into the bark at intervals with adjustable pressure and depth is characterized by the fact that the Tools have wedge surfaces parallel to the log axis and suddenly radial to the log penetrate into the bark. The machine has one or more significantly faster than the round timber jacket surface revolving cylinder with a central axis parallel to the log axis, in which at Circumference one-armed levers each carrying a tool of a blunt wedge shape at the free end are articulated that the tool impinges radially on the log and thereby the lever, by stops limited in their deflection, assume an approximately tangential position to the cylinder circumference.

If the impact strength and shape of the impact tool are chosen favorably, it turns out that at approximately vertical blow the bark will be split off with the greatest certainty, while the wood is undamaged remains because its elastic deformation and the specific pressure as a result of the always the same Contact surface reliably stay within harmless limits.

The desired angle of impact of around 90 ° changes only slightly because the direction of impact on crooked woods is _{shifted by ± V 8 of} the trunk cross-section (parallel to itself).

The invention is shown schematically and by way of example in the drawing. It shows

Fig. 1 in a cross section the wedge impinging perpendicularly on the bark,

Fig. 2 is a side view.

The tool k, in the shape of a truncated wedge in the direction of the trunk, e.g. B. 4 cm long, splits the bark, shifts it when it is suddenly pressed perpendicular to the bark. After working the entire circumference of the trunk, the bark can be removed by using a rough brush.

The tool k is designed as a striking tool which, by measuring the speed of the disk m and its own weight, is given a very specific force that excludes damage to the wood. Next the tool is k at the end of the lever h by the arrangement of the / swings around the on the disk m fitting joint and by means of stop q to disk m harbors, achieved in that the tool k at the moment of the impact and under the pressure of approximately with the peripheral speed of the disk m merges into a movement tangential to the trunk. The tool k pulls the bark with it, sliding around part of the circumference of the trunk.

The trunk can be rotated around its own axis by the rollers o / p. By arranging a corresponding number of disks m with z. B. four percussion tools, trunk sections can be debarked over the entire length at the same time, whereby they turn once around themselves. The use of elastic material, such as rubber, of which the striking tool can consist entirely or in part, offers advantages when debarking very sensitive wood with a soft bark.

The configuration of the machine according to the invention to mobile or stationary debarking machines is possible with known means.

Claims (3)

PATENT CLAIMS: 1. Machine for debarking round wood with a relative movement of tool and round wood to each other, the tools have a blunt wedge shape with a limited striking surface and Penetrate into the bark at regular intervals with adjustable pressure and depth, marked due to the wedge surfaces parallel to the log axis that radially to the log into the Bark suddenly penetrating tools. 2. Machine according to claim 1 with one or more cylinders rotating considerably faster than the round wood jacket surface with a central axis lying parallel to the round wood axis, characterized in that in these one-armed on the circumference, at the free end each one tool (A :) of a blunt wedge shape carrying lever ( h) are articulated in such a way that the tool strikes the log radially and the levers, limited in their deflection by stops (q) , assume an approximately tangential position to the cylinder circumference. 3. Machine according to claim 1 and 2, characterized in that the tools wholly or partly made of rubber. Considered publications:
German patent specifications No. 286 581, 529 087,
947,878 703; German patent applications Z2384XII / 38i (announced on February 19th 1953), Ζ2766ΧΠ / 38Ϊ (announced on July 30, 1953); U.S. Patent Nos. 1,549,855, 2,397,490,
576 967, 2 655 961. 1 sheet of drawings 109 759/112 1.62