DE2938753A1 - DETESTER - Google Patents

Description

September 25, 1979 18,122 / ki

Oy Fiskars Ab, Helsinki / Finland

Deluders.

The invention relates to a pruner for pruning standing trees. The device has a support body and a disk-shaped or part-disk-shaped rotary knife rotatably mounted in it.

Manually operated, gearless delaminers for standing Trees are known in the following embodiments.

Pruning saw that is mounted on a pole; De-pruning iron, which is mounted on a pole, wherein the cutting edge is used to chop off the branch; scissor-like delaminers.

These devices have the disadvantage that they work imprecisely and with low efficiency. By the Limbing is intended to improve the quality of the wood for technical purposes. According to the latest findings the following requirements must be met:

03Ö0U / 0887

a) The branches must be cut off directly on the tree trunk;

b) the bark and wood must not be damaged.

Tests have shown that the work with the present delimbing is easier and carried out faster can be than with the aforementioned, known devices. In addition, the work result is flawless.

The delaminator according to the invention is characterized in that two knives in a constant Distance from each other are rotatably mounted and that this knife carrier attached to the handle is designed so that a Branch from the side facing the handle of the knife can freely enter between them.

An exemplary embodiment of the invention is described below with reference to the accompanying drawing.

The support body 1 of the device has a handle tube 2, the lower part of which is provided with a handle 3 and to which a hook-shaped, solid knife carrier 4 made of steel is attached at the top. In the knife carrier 4, two identical knives 5a and 5b are rotatably mounted about axes of rotation 6a and 6b, which are ground on the circumference and on one side surface and whose cutting edges delimit a gap 7, but do not touch. On the side facing away from the knife carrier, each knife 5a or 5b has a flat surface 8. If necessary, the delimbing device can be provided with an impact body 9, which can be pushed with its bore onto the handle tube 2, as well as with an anvil Io.

030014 / 08Ö7 " ³ "

The pruner is used for pruning growing trees as follows: The hook-shaped knife carrier 4- is arranged above the branch in such a way that the flat surfaces 8 of the knives rest against the trunk. If one now pulls on the handle 3, the rotating knives 5a and 5b cut into the branch 11 from opposite sides, so that it is cut off just below the surface of the trunk.

With hardwood and solid twigs, the work can be made easier by not, as described above, pulls on the handle, but with the strike body 9 strikes against the anvil 10.

The working area of the pruner can be enlarged by using various extension pieces be, the impact body and the anvil in the case of their use always on the lower part of the support body are provided.

The above description and the drawing are only used to explain the inventive concept in which The construction of the delaminator can be modified considerably. For example, need the knife not to be circular over its entire circumference, but only in that part of the circumference that is actually used for delimbing serves. In this case, springs are required to return the knives to their original position.

You can use the present delaminator except for delimbing from growing trees can also be used for other purposes, for example for thinning young trees or for removing undergrowth. In this case it will be

- 4 0300U / 0887

the impactor and the anvil are not needed and the ground is made.

the train follows at an angle of about 45 to the

030014/0887

Claims (2)

September 25, 1979 18.122 / ki Oy Fiskars Ab, Helsinki / Pinnland De-limers. Claims 1. De-pruner, especially for pruning growing trees, with a support body, the one Handle and at the end of the same has a knife holder, in which the hand is formed with cutting edges, disc-shaped or sector-shaped knives are rotatably mounted for delimbing, characterized in that that the knives (5a, 5b) in the knife carrier (4-) at a constant distance from one another are rotatably mounted and the knife carrier (4) is designed so that a branch of the handle (2,3) facing side of the knife (5a, 5b) is free zwir see this can occur. 2. delaminator according to claim 1, characterized in that that the knife carrier (4 ·) is hook-shaped and the connecting line of the axes of rotation (6a, 6b) of the knives (5a, 5b) to the stem (2,3) is substantially perpendicular. 0300U / 0887 3 · limber according to claim 1 or 2, characterized in, that on the lower part of the support body (1) an anvil (lo) is provided and above the same an impact body (9) is slidably mounted. 030014 / Π 887