FI112182B - Barking shaft arrangement in a barking device - Google Patents

Description

112182

Peeler shaft arrangement for the peeler

The present invention relates to a peeling shaft arrangement for a peeling device for peeling or pre-treating trees separately for final peeling and at least partially removing peeled bark from a flow of wood passing through a peeling device, wherein the peeling edge is rotatable peeling shafts provided with a plurality of teeth extending beyond the peripheral surface of the shaft arranged to tear the bark of the hand-cut trees transversely to the longitudinal direction of the trees and at the same time displacing the trees transversely to said axes; a support surface on which the treated trees pass through the debarker.

Such a peeler is known from U.S. Patents 4,685,498 and 5,394,912, for example.

In the beginning, such known peelers have the problem of being difficult and expensive to repair worn or damaged teeth. Teeth have to be. 20 to repair one by one with the peeling shaft in place. Annex.

. · *. To eliminate these drawbacks there is provided a peeling device according to the invention. in the peeling shaft arrangement arranged in accordance with the invention so that the teeth. · *. 25 are designed such that they operate in both directions of rotation of said rotatable peeling shafts, and the peeling shafts are arranged to be pivotable.

Thanks to this system, the new teeth can be quickly actuated]! :: 30 simply by rotating and fixing the shaft 180 ° relative to the original position so that it is parallel to the original position, but ': rotationally opposite to the original position.

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The teeth acting in opposite directions of rotation of the peeling shaft may be different or the same. When using different teeth in opposite directions of rotation of the shaft, different peeling power can be obtained in different directions of rotation, eg for winter peeling and summer peeling. Sharp teeth 5 can also be used first to scrub difficult to peel or icy trees, and worn teeth can be used to treat easily peeled trees.

In a preferred embodiment of the invention, it is arranged that the peeling shaft is shaped and dimensioned such that the disengaged shaft 10 can be rotated 180 ° in the same position or in a corresponding position. This arrangement is particularly useful when the stripper has two types of axes, which are symmetrical with respect to their mounting and axial tooth distribution. Then every other place has a similar axis. It is on this basis that the term "corresponding place" is to be understood.

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In particularly preferred embodiments of the invention, it is arranged that the peeling shaft is shaped and dimensioned such that the disengaged shaft can be rotated 180 ° to the position of the adjacent shaft or the like. The term "corresponding place" is understood to mean every second peeling. 20 axis positions where the axes are parallel. This arrangement is suitable for use when all the peeling shafts of the peeler are similar to each other. The advantage of this arrangement is that a peeler is required; * only one type of spare axle, which fits in all places. In principle, such an axis could be mounted in the same position in both of its pivoting positions, but would require e.g. different attachment points for different axial rotation directions.

• '': In another preferred embodiment of the invention, the attachment of the peeling shaft to the peeling device is arranged such that the shaft. · · ·. 30 is removable and removable via a peeler wood treatment space for removal.

The invention will be further described below with reference to the accompanying drawings in which: 3 112182

Figure 1 is a schematic side view of the peeling axes of the peeling apparatus of the invention.

Figure 2 is a sectional view taken along line II-II in Figure 1.

Figure 3 is a sectional view taken along line III-III of Figure 2.

The debarking device 1 shown in the drawings is intended to debark or pre-treat the trees 2 for separate final debarking and at least partially remove debarked bark from the wood stream passing through the debarking device.

The debarking device 1 has a plurality of rotatable debarking axes 3 extending in a direction of up to 15 nanoseconds to the wood 2 fed therethrough. In the drawing example, sprockets 6 are connected to both ends of the debarking axes 3, at which to each other and to the gear motor of the electric motor (not shown).

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The barking shafts 3 are provided with a plurality of teeth 4 extending beyond the peripheral surface of the shaft 3, arranged to tear the bark of the trees to be treated: transverse to the longitudinal direction of the trees while moving transversely to the barking shafts 3.

; ;;;. · 25

The peeling shafts 3 together with their teeth 4 form part of the support surface, •: · *: on which the treated trees 2 pass through the peeling device 1. In the example of the drawing there are four peeling shafts 3 which are arranged to form an inclined plane. Otherwise, the support surfaces are fixed. The surfaces are shaped so that, together with the support surface formed by the peeling shafts, they provide an open channel at their ends which extends from the peeler 1 to the end. The gutter may be open or covered from above.

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The teeth 4 in the peeling shafts 3 are shaped such that they operate in both directions of rotation of the peeling shafts 3. Debarking mechanism 1 debarking shafts 3, however, all rotate at the same, in the direction of the arrow 7 (Figure 2). However, teeth 4 operating in different directions can be utilized when the peeling shafts 3 are arranged to be pivotable.

In the solution of Figure 1, all four peeling shafts 3 are formed similar to each other. However, the teeth spaced evenly along the circumference of the peeling shaft 3 are asymmetrical in the longitudinal direction of the shaft 3, whereby the teeth 4 of the retractable shafts 3 are provided so that the adjacent shafts 3 are disposed in different directions, i.e. rotated 180 °.

The teeth 4 15 acting in opposite directions of rotation of the peeling shaft 3 may be different or similar. Thanks to this arrangement, new teeth can be quickly actuated simply by rotating and fixing the shaft 180 ° relative to the original position so that it is parallel to the original position but opposite to the original position of rotation. For example, in Figure 1, the uppermost axis can be rotated to fit either the second uppermost axis or the lower axis. Iin on the scene.

At both ends of the peeling shafts 3 are smaller diameter shaft ends 8, in which bearings with bearing housings 9 and sprockets 6 are mounted. The bearing housings 9 are arranged to be fastened with screws 11 at the ends of the peeler 1 to the end plates 10 at the peeling shafts 3.

The attachment of the peeling shaft 3 to the peeling device 1 is arranged such that the shaft '3 can be lifted out of its position during removal and correspondingly lowered into place through the wood treatment space 5 of the peeling device 1. In the example of the drawing * * '· * this is accomplished by forming upwardly open grooves 12 at the top of the end plates 10 for the shaft ends 8 of the peeling shafts 3.

Claims (6)

1. A barking device (1) barking shaft arrangement, which barking device (1) is intended for both barking or pretreating of trees (2) for a final barking performed separately, as for at least partial removal of detached bark from the stream of trees moving through the barking device, which barking device has a plurality of rotatable barking shafts (3) extending in the forward direction of the trees (2) measured through the barking device, which barking shafts (3) are provided with a plurality of protruding teeth (4) located on the outside of the peripheral surface of the shaft (3), which teeth (4) are arranged to tear the bark of the trees (2) to be treated, transverse to the longitudinal direction of the trees and to simultaneously move the trees across against said shafts (3), and which shafts (3) with teeth (4) are arranged to constitute at least part of the support surface on which the trees (2) to be treated are moved by the barking device (1), characterized in that the teeth (4) are designed so that they function in the rotational directions of said rotary barking shafts (3), and that the barking shaft (3) is arranged so that they can be reversed. «T 2. An arrangement according to claim 1, characterized in that the ··· ′ teeth (4) acting in opposite directions of rotation of the barking shaft (3) are different. . . 3. An arrangement according to claim 1, characterized in that the two teeth (4) acting in opposite directions of rotation of the barking shaft (3) are similar. * · · »> 1 ·; »· • · An arrangement according to claim 1, characterized in that the barking shaft (3) is designed and dimensioned such that a barking shaft (3), which is detached from its position and is turned 180 °, can be fitted in the same location or another corresponding location. 112182 An arrangement according to claim 1, characterized in that the barking shaft (3) is designed and dimensioned so that a barking shaft (3) which is detached from its position and turned 180 ° can be fitted to a shaft adjacent to it. location or other equivalent location. 5 An arrangement according to claim 1, characterized in that the attachment of the barking shaft (3) in the barking device (1) is arranged so that the shaft (3) can be lifted from its place by the tree treatment space (5) of the barking device (1). respectively lowered to its place where it should be mounted. »· '· • ·« »· 1 I ♦