FI52008C - MOBILE SKOGSHACKENHET - Google Patents

Description

ν ^ · | rB1 ANNOUNCEMENT 52008

W (11) UTLÄGGNINGSSKRIFT “U

(51) Kv.lk '/ Int.CI. · A 01 G 23/08 D 21 B 1/02 FINLAND — F INLAND (2.1) Patent application — Puenunsökning 33 ld / 74 (22) Application date — Ansökningsdag 15 · 11.74 (23 ) Primary Cloud — Glltighettdag 15 · 11 · 74

National Board of Patents and Registration (41) T.® «H * - * -» * - ta * 16-05-76

Patent- oeh registerstyrelsen <"> 26.02.77 (32) (33) (31) Privilege claimed — Begird priority (71) Työväline Oy., Kutomon tie 16 A, 00380 Helsinki 38, Suomi-Pinland (SP) (72) Pertti The present invention relates to a mobile forest chipper unit which can be connected to a vehicle or has its own drive motor and which comprises a chipper. with feeders, a hoist for transferring trees to the chipper feeder, a chip hopper, etc., and a chip transfer tube connecting the chipper to the chip tank.

Today, due to the shortage of raw materials, it is necessary to take advantage of thinner and thinner trees and branches, which have previously been considered useless. The object of the present invention is to provide a forest felling unit by means of which forest felling s a branches or the like left on the ground can be recovered more efficiently and more easily and converted into wood chips on site in the field.

The logging unit 11e according to the invention is characterized in that, in order to facilitate and speed up the handling of wood, the chipper with its feeding devices can be directed towards the wood to be treated on one or both sides of the vehicle in both horizontal and vertical planes. The horizontal alignment can advantageously be done on both sides of the unit, whereby the operating range is made larger. Vertical orientation is an advantage, especially when dealing with short trees, which are then caused to fall on the chipper due to their weight.

52008

The logging unit according to the invention is well suited for use in terrain, where it can move along the tracks and recover branches that have fallen to the ground during pruning, turning them into chips. The logging unit is also able to process normal-sized pulpwood as such, thus also offering a new procurement method.

The invention will be explained in more detail below with reference to the accompanying drawing.

Figure 1 is a schematic side view of a logging unit according to the invention.

Figure 2 shows the same unit seen from above.

Figures 3 and 4 show the orientation of the chipper in the vertical plane.

In the embodiment according to the drawing, the tractor is used as the drive device of the forest chipper unit and as a power source. On the wagon chassis 9 connected to the tractor päälle, the main parts of the wood chipper unit are mounted: the chip hopper 1, the chipper 2 with its feed devices 3, the chip transfer pipe 5 connecting the chipper 2 to the chip hopper 1 and the lifting device 4.

The chipper 2 with its feeding devices 3 and the lifting device 4 are preferably mounted on a base 10 which is pivotable relative to the carriage base 9. Thus, the chipper feeder 3 can be oriented in the desired direction in each case, whereby the operation of the forest chipper unit becomes considerably more flexible. Suuntamiseen. hydraulic or mechanical devices known per se can be used. The feeder 5 can be directed to either side of the unit. As the lifting device 4, a conventional forestry crane can be used, which can be oriented either following the movement of the chipper feeder 3 or independently of it.

The feeder 3 of the chipper 2 is also orientable in a vertical plane. This directivity can be achieved e.g. as shown in Figures 3 and 4. In the case shown in the drawing, the chipper 2 moves together with the feeder 3 both horizontally and vertically, but the feeder can also be arranged to be controlled somewhat independently of the chipper 2. The chipper 2 with feeders 2 and liquid motors 6 acting as a chipper drive preferably provided by a hydraulic cylinder 13 attached to the carriage base 9. The turning range is preferably about 90 °, so that the chipper feeder 3 can reach an almost vertical position. This position is advantageous when understanding short trees, whereby, due to their weight, they fall into the chipper 2.

The logging unit according to the invention can advantageously be driven, e.g. up to the plot-Tour. The small trees and branches on the ground are transferred by means of a crane 4 to the chipper feeder 3, which feeds them to the chipper 2. The chips are then transferred to the chip hopper 1 using the chip blower's force.

52008

The chip tank is preferably covered at the top with a protective curtain 7, which prevents the chips coming from the pipe 5 from being thrown outside the tank 1. The chip container can be tipped around the bearing 11 for emptying, whereby said protective net 7, either not attached to the rear edge of the chip container 1, allows the chips to discharge in a controlled manner. During emptying, the trolley can be supported by separate, e.g. hydraulically operated, support legs, which are not shown in the drawing.

The logging unit according to the invention is not narrowly limited to the embodiment described above, but may vary in detail within the scope of the claims. Thus, for example, the crane 4 does not have to be located in connection with the chipper as shown in the drawing, but can be placed, for example, on top of the tractor's cab. The forest chipper unit can be connected to a drive other than the tractor or can alternatively be equipped with its own drive motor. Likewise, the directivity of the chipper can be achieved by utilizing several other different hydraulic or mechanical devices. Of course, there are also plenty of alternative solutions for the chip tank and its emptying.