FI98201C - Apparatus for making thin sheets of trees - Google Patents

Description

1 98201

EQUIPMENT FOR VENING WOOD

The invention relates to an apparatus for veneering wood.

For example, a method known from Finnish patent application-5 ta 322/71 and Finnish publication 94736 is made by cutting veneers from a tree trunk, the thickness of which can vary, for example, between 1-6 mm. Compared to conventional and mainly used sawing in wood veneer 10, it has the advantage that valuable timber is not sawn into chips, but is obtained as a whole as a building material.

Prior art equipment for veneering wood is relatively complex and expensive, so they are not suitable for small-scale veneering of wood. Thus, the object of the invention is to provide a new type of equipment by means of which it is possible to veneer wood simply and advantageously, for example in field conditions and on a site-by-site basis.

For aspects of the invention, reference is made to the claims.

The wood veneering apparatus according to the invention comprises an elongate drive arm, the length of which can vary from a few meters to more than ten meters, depending mainly on the length of the wood trunks to be treated and the veneering power used. The drive arm, for example its lower surface, is supported and secured by a substantially arm-parallel, elongate blade plate 30 at a distance from the drive arm or associated portion that determines the thickness of the veneer.

Preferably, this thickness, i.e. the distance of the cutting blade, is adjustable in a suitable range. In addition, the apparatus comprises an articulation point, a fixed and supporting structure, on which the operating arm is preferably supported by a horizontally pivoting support.

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Likewise, the apparatus includes a support frame in which the wood to be veneered is supported in its longitudinal direction in an oblique position with the longitudinal direction of the cutting blade. In addition, the support frame has suitable fastening means with which the wood 5 can be rigidly fixed in place to the support frame during veneering.

Thus, by pulling or pushing it from the end opposite the articulation point, and at the same time pressing the drive arm and the blade therein against the body 10 to be veneered, the blade cuts a veneer the entire length and width of the body. Because the body to be treated is positioned at a suitable oblique angle to the cutting blade, cutting occurs obliquely from one end of the body to the other and not simultaneously along the entire length of the body, with relatively little force required for cutting.

Thus, the apparatus according to the invention, provided with a sufficiently long operating arm, is well suited to field conditions for use by one or two men. It is also possible that the operating arm is moved mechanically in a suitable manner. It is also possible, within the scope of the inventive idea, that the drive arm has two cutting blades, so that two tree trunks can be veneered at the same time. The cutting blades can then be on the same side or on opposite sides of the articulation point, the gripping point of the operating arm, i.e. the pushing or pulling point, alternatively being either at one or both ends of the operating arm.

It is also possible for the operating arm to be adjustable in length, in which case the operating arm comprises one or more extensions which can be attached to the operating arm or telescopically moved relative to the operating arm. It is also possible for the blade to be adjustable in length, i.e. the blade consists of blade parts which can be rigidly fastened to each other in a sufficient number to achieve the desired blade length.

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The apparatus according to the invention has significant advantages over the prior art. The equipment allows wood to be veneered in field conditions, for example on a construction site or even immediately in the forest after the felling of wood. The hardware is very simple and reliable as well as easy and light to use.

The invention will now be described in detail with reference to the accompanying drawing, in which Figure 1 shows an apparatus according to the invention, Figure 2 a cross-section of the steel of the apparatus of Figure 1, and Figure 3 a blade solution.

One of the devices according to the invention shown in the drawing comprises an articulation support point 3, at which, for example, a suitable support can operate under field conditions. Here, a long horizontal drive arm 1 is pivotally articulated at one end. Attached below the operating arm is an elongate cutting blade 2, above which is a blade-length support and guide plate 7. A gap is formed between the support and guide plate and the blade, which determines the thickness of the veneer to be machined.

The apparatus further comprises a support frame 4, which in this application is a ground-supported stand on which the horizontally veneered wood 5 is fastened by fastening members 6 in the support frame. Preferably the fastening members rest, bite or press 30 at the ends of the wood to be treated and as low as possible. the whole tree trunk.

The apparatus according to the invention shown in the drawing is used as follows. A suitably long wood 5 is fastened horizontally to the stand 4 by means of fastening members 6 and the support frame is turned or positioned so that when the drive arm 1 is turned horizontally, the blade 2 extends into the wood frame area, wood to be treated. In this case, when the users 8 push and pull-5 from the extreme end of the operating arm 1 and at the same time press the operating arm downwards, the blade 2 and the support and guide plate 7 press against the wood 5 and the wood is cut off from one end to the other by a veneer -10 distance between control and guide plate 7.

It is possible that the blade is arranged in two directions, whereby by turning in both directions of the operating arm, the blade cuts the veneer from the wood. In the case of Figure 1, the operating arm must be turned back over the wood to the initial position for the next veneer.

In the embodiment of Figure 3, the blade 3 consists of three identical blade parts 9 rigidly connected to each other by two stiffeners 10 passing through the blade structures. Thus, by changing the number of blade parts 20, a blade of suitable length is always obtained according to the length of the tree trunk to be treated.

The invention has been described above by way of example with the aid of the accompanying drawing, the applications of the invention being possible within the scope of the inventive idea defined by the claim.

Claims (6)

Device for producing thin discs of trees, characterized in that the device belongs to: 5. an elongate driving arm (1) - one supported on the driving arm and substantially with the same parallel, elongated cutting bite (2), - a joint support point ( 3), on which the drive arm is pivotally supported, 10. a supporting post (4) for supporting the tree (5) of thin discs must be cut longitudinally in an oblique position relative to the longitudinal direction of the cutting bite and fastening elements (6). ) for attaching the tree to the supporting post, whereby by swinging around the drive arm the bite from the tree cuts a thin disk with one from one end to the other cutting of the tree. 2. Device according to claim 1, characterized in that the device belongs to an extension part of the drive arm (1) for controlling the length of the drive heat according to the required torque and supply-stopping forces. 3. Device according to claim 1, characterized in that the bite (2) consists of fixed fastening parts (9), which can be fixed to each other, whereby the length of the bite can be adjusted if necessary. Device according to claim 3, characterized in that the bite parts (9) are stiffened with each other by means of stiffening material (10) extending through them. 5. Device according to claim 1, characterized in that, under field conditions, the guide support point (3) consists of a stump fixed to the ground.