FI95342C - Felling head - Google Patents

Description

'95342 2 The collection of small trees for recovery should be done as a separate large-scale work step.

In order to maximize the yield of timber, to be tolerable, to have minimal movements in the forest and to be suitable for forestry after the completion, a general felling head suitable for felling and collecting all types of trees should be available.

10 Because the mass felling of small trees and the felling and collection of individual trees place very different requirements on the sizing of the grapple and its movements, as well as on the design of the saw, it is very difficult, if not impossible, to build a compliant grapple using a traditional one-sided structure. The invention solves the problem by providing different sides of the dump head with different sawing and gripping devices, as set out in more detail in the appended claim 1. The dependent claims present preferred embodiments of the invention.

20

One embodiment of the invention is illustrated in the accompanying drawing, which shows a perspective view of a felling head assembly according to the invention connected to the end of a boom 1 of a forest loader.

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The solution according to the invention has not had to compromise on the properties of a bulk dump and a conventional dump.

The solution combining the advantages of a mass and a conventional felling head has an efficient felling and the feeding of the processor 2 is also possible in 30 practical varying thinning forests. In the solution according to the invention, the pouring head is double-sided, including a gripping and sawing device 4 for pouring one body, and a side with a wider gripping member 5a and a saw 5 for mass pouring. The combination tipping head 3 is easily, by means of technical devices known per se, capable of directing the target to the side which is • most suitable in each case.

95342 3

The selection of the tipping head 4 or 5 takes place in rotation about a vertical axis when the tipping head 3 is in a vertical position corresponding to the initial position of the cycle. The tipping head assembly 3 is attached to the loader rotator 6. The selection of the different tipping head options 4 and 5, 5a 5 requires the tipping head assembly to be rotated 180 ° about the vertical axis. For this purpose, the rotator can be equipped with a control system which, in a single command, gives the rotator an angle change of 6 180 °. The system providing a 180 ° step to the rotator 6 can receive its impulse 10, e.g. from a compass system.

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4,95342

Claims 1. A felling head assembly that can be attached to a forest loader and is suitable for felling trees of different sizes by means of cutting devices on different sides of the felling head, with one side of the felling head (3) having one sawing and gripping device (4) and the other side of the felling head (3) there is a rotating device (6) between the double-ended tipping head (3) and the loader boom (1) in said manner for rotating the tipping head (3) about a vertical axis when the tipping head is in a vertical position corresponding to the initial position of the cycle, characterized in that the tipping device 5) a separate gripping device (5a) is suitable for collecting small wood.

A tipping head assembly according to claim 1, characterized in that said different cutting and gripping devices (4, 5) are located on opposite sides of the tipping head (3), the selection of different cutting and gripping devices (4, 5) requiring the tipping head combination to be rotated 180 ° around the vertical axis.

A tipping head assembly according to claim 2, characterized in that said rotary device (6) is provided with a control system which gives a 180 ° angular change to the rotary device (6) with a single command.

A tipping head assembly according to claim 3, characterized in that the system providing a 180 ° step to the rotary device (6) receives its impulse from the compass system.

Claims (4)

95342 1. A fall head combination that can be felled by a forest loader, which is suitable for felling trees of different sizes with the help of different sides operating mowing means, with the falling head (3) on one side having a saw and gripping device suitable for the falling of a trunk ( 4), and on the other side of the trap head (3) has a cutting device (5) suitable for mass-folding of tree, and between the said double-sided trap head (3) and the loading bar (1) in said manner there is a rotating device (6) for rotate the trap head (3) about a vertical shaft, where the trap head is in the starting position of the working turn corresponding to the vertical position, characterized in that in connection with the cutting device suitable for mass precipitation, there is a special gripping device (5a) for collecting butter . The trap head combination according to claim 1, characterized in that said different cutting and gripping devices (4, 5) lie on opposite sides of the falling head (3), the choice of different cutting and gripping devices (4, 5). ) requires rotation of the trap head combination 180 ° about the vertical axis. .. 25 3. A folding head combination according to claim 2, characterized in that said rotation device (6) is provided with a control system which, by means of an order, gives the rotation device (6) an angular change of 180 °. 30 4. A head-head combination according to claim 3, characterized in that the 180 ° step of the rotation sensing device (6) receives its impulse from a compass system. I. 95342 # ΡΠ1ί - y I ^