FI114620B - Arrangement at the output end of a barking device - Google Patents

Description

1 114620 Arrangement at the discharge end of the peeler

The present invention relates to an arrangement at the discharge end of a peeling device for peeling or pre-treating trees separately for loose bark peeling and for at least partially removing peeled bark from a wood flow passing through the peeling device, wherein the peeling device provided with a plurality of teeth extending beyond the peripheral surface of the shaft arranged to tear the bark of the wood to be treated transversely to the longitudinal direction of the trees while displacing the wood transversely with respect to said axes;

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

In the prior art, such known scrubbers generally have a fixed threshold or height-adjustable discharge door at the discharge end of the debarker, which controls the discharge of trees from the debarker.

The demolition hatch and fixed threshold prevent the trees from moving freely in the direction of rotation of the trees at the hatch or threshold, resulting in unnecessary rounding of the tree ends *: tree chipping.

I 25th

The discharge hatch and fixed threshold also easily cause jams and fluctuations in capacity on the peeler. In addition, there must be · · a clear drop point after the manhole and threshold, which increases the height of the entire structure.

: ·. In order to overcome these drawbacks, the arrangement according to the invention is characterized in that a continuous extension guiding the trees exiting the debarker is arranged on the discharge side of the debarker, guiding the trees exiting the debarker, the extension of which extends at least approximately peeler with a support surface guiding the trees.

2 114620

It is important for the proper operation of the debarker that the support surface guiding the trees of the extension is of such a direction and shape that it allows free movement of the trees also in the remainder of the debarker.

5 The extension may be mimicked in the form of a fixed support surface solely to guide the trees discharged from the stomach. In this case, the extension does not at all control the operation of the peeler itself. In contrast, in preferred embodiments of the invention where the extender is provided with a conveyor or the extension forms a conveyor, the extension also plays a significant role in the control of the stripper itself. Particularly, this control function 10 occurs when the conveyor is tracked for speed control. In its simplest form, the discharge rate control can be simply a switch to turn the conveyor on or off. The conveyor can then be used to adjust the peeler function by braking or facilitating the exit of the trees.

In this way, the degree of filling of the debarker and the residence time of the trees in the debarker can be affected.

In yet another preferred embodiment of the invention, it is arranged that the cross-section of the tree-guiding support surface of the extension is at least at its lower part substantially aligned with the cross-section of the tree-guiding support surface of the stripper.

The invention will now be described in more detail with reference to the accompanying drawing, in which: Figure 1 is a schematic side view of a junction between the peeler and the arrangement according to the invention.

Figure 2 shows a section along line II-II in Figure 1.

Figure 3 is a sectional view taken along line III-III of Figure 1.

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

3, 114620

Debarking mechanism 1 therethrough a plurality of feeding of the trees 2 to the advancing direction A, extending by an unillustrated motor and the transmission members in the direction indicated by the arrow 7 of rotatable debarking shafts 3.

The peeling 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 treated tree 2 transversely to the longitudinal direction of the trees and at the same time move the trees transversely to the peeling shafts 3.

10 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. In other respects, the support surfaces are solid surfaces which are shaped such that together with the support surface formed by the peeling shafts, provide a trough open at its ends, which extends from the peeler 1 to the end.

On the discharge side of the debarker 1, a continuous extension, generally designated 5, guiding the debarking trees 20 2 from the lower level of the support surface supporting the debarker trees 2 is provided.

In the example of the drawing, the support surface guiding the trees 2 of the extension 5 is formed at least approximately parallel to the support surface guiding the trees 2 of the peeler 1.

*; In the example, the supporting surface guiding the trees 2 of the extension 5 consists of the conveyor 6 and its *: · 25 side surfaces, denoted by reference numerals 8 and 9, and the guide portion 10, which is interposed between the conveyor 6 and the debarker 1.

· The conveyor 6 is provided with means known per se (not shown) for adjusting the speed of the conveyor.

[Cross-section of the support surface guiding the trees 2 of the extension 5 is arranged at least at its lower end substantially in accordance with the cross section '* of the support surface guiding the trees 2 of the peeling device 1.

4, 114620

The opening 12 formed in the discharge end 11 of the debarking device 1 is at least at its lower end dimensioned at least to the size of a trough formed by a support surface on the debarking device 1 on which the treated trees 2 pass through the debarking device 1.

The extension 5 guiding the trees 2 discharged from the debarker 1 corresponds, for example, to the average length of the trees 2 to be treated in the debarker 1. After extension 5, the control of the trees 2 for further treatment is completely free.

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Claims (6)

1. Arrangement in the discharge end of a barking device (1), which barking device (1) is intended for barking or pre-treatment of trees (2) for a final barking, which is performed separately, and for at least partial removal of detached bark for the flow of trees moving through the barking device, which barking device has a plurality of rotatable barking shafts (3) extending in the forward direction (A) on the trees (2) measured by the barking device, which barking shafts (3) are provided with a number of teeth (4) which when outside the outside of the peripheral surface of the shaft, which teeth (4) are arranged to tear the bark on the trees to be treated, transverse to the longitudinal direction of the trees (2) and to simultaneously move the trees transversely with with respect to said shafts (3), and which shafts (3) with teeth (4) are arranged to constitute at least part of the supporting surface on which the trees (2) being treated are moved by m the barking device (1), characterized in that at the discharge end of the barking device (1) to the plane of the lower part of the supporting surface carrying the trees (2) of the barking device there is provided an uninterrupted extension (5) which controls the trees (2) which is discharged from the barking device (1), wherein the support surface of the extension (5) which controls the trees (2) is designed to be at least approximately equal to the support surface which controls the trees (2) in the barking device (1). 1 · • I I 2. Arrangement according to claim 1, characterized in that the extension (5) of • · * »: * ·,. in the form of a fixed support surface is arranged to control only the trees (2) which are discharged from: *: the barking device (1). :: 25 : 3. Arrangement according to claim 1, characterized in that a conveyor (6) is connected to the extension (5). Arrangement according to claim 1, characterized in that the extension (5) is a conveyor (6). Arrangement according to claim 3 or 4, characterized in that the conveyor (6) is arranged adjustable at its speed. »» 7 114620 Arrangement according to claim 1, characterized in that the cross-sectional area of the support surface of the extension (5) guiding the trees (2) at least from its lower part is arranged substantially in accordance with the cross-sectional surface of the supporting surface (1) which controls the trees (2). ). 5 · * *. t> »t» »