FI112318B - A drive device - Google Patents

Description

112318

Timber Harvester

The invention relates to a device for cutting and collecting small trees in a bundle and transferring the bundle in an upright position to a cargo space into which it is dumped for transport.

Devices made for this purpose exist.

From the previously disclosed patent publications, several functions are disclosed which are contained in the device according to the application. The disadvantage is that the functions are implemented impractically and the solutions are in several different publications.

The object of the present invention is to provide a practically well-functioning harvester without the above-mentioned drawbacks.

To accomplish this, the device according to the invention is characterized by what is stated in the characterizing part of claim 1.

The harvester is characterized in that the device is provided with a cutting blade against which the trees are pressed with pivoting arms, which at the same time press the trees behind the pivoting latches into a collection pocket. The pocket is fitted with, for example, a spring-loaded plate that stretches backwards when the collection pocket is full. The purpose of the board is to keep the trees upright even when the collection pocket is short.

Thus, the harvester according to the invention has only two main functions: the swivel arms open to take the trees and the arms closed to cut and store the trees in the collection pocket.

With this function, the trees are squeezed through the cutting blade and latching devices into a collection pocket where the trees stand upright between the latches and the spring-loaded back plate.

2, 112318

The harvester is also provided with a mechanism for opening the latching devices to unload the bundle.

The most important advantage of the invention is that the work is significantly accelerated, which is important for harvesting small trees.

In addition, operation is easier with fewer driver functions.

The invention will now be described in detail with reference to the accompanying drawings.

Figure 1 is an axonometric view of the device.

Fig. 1 shows a harvester for repairing small trees with a handle 8 fitted to the grapple body 1 by a hinge 15 which is pivoted relative to the body 1 by a power generator 16 to empty the grapple from horizontal to emptying the collecting pocket 7. At the upper end of the arm 8 there is a pivoting device 17 for pivoting the grapple and a power means 18 between the boom 19 and the pivoting device 17 for keeping the grapple in a substantially upright position during the harvesting phase of the trees.

The device comprises a body 1 which is pivotally connected by means of pivots: the pivoting arms 2a and 2b are connected as pivoting means of the power units 3. The arms 2a are arranged so that there is a space between them: a cutting blade 4 at the final stage of turning the arms.

;;; * The device includes horizontally pivoting latching devices 6 ··· ’preferably 4 for storing trees in a collection pocket 7.

The latches 6 of the harvester are opened by means of a power unit 9 which pivots on the shaft 11 a vertical axis 10 on both sides of the device ;;

Shaft 12 is provided with rods 12 which pivot the rods in one direction and with springs added to allow the trees to enter between the latching devices 6 and, in the other direction, by rod movement, open the latches for discharging the trees from the grapple.

112318

The device is preferably provided with a horizontally movable spring-loaded rear plate 14 for holding the trees upright during operation in a variable volume collecting pocket 7 formed in front of the latches 6 on the sides of the frame 1 and in the area between the rear plate 14.

The latching devices, together with the pairs of swing arms, which also perform tree trimming, form a combination which provides an almost continuous tree collecting stump and bundling device which substantially improves productivity and compared to feller collecting devices, which require several successive actuator applications.

The invention is not limited to the embodiment shown in the specification and the drawing, but may be modified within the scope of the appended claims.

♦

Claims (2)

1. Small tree propulsion assembly in which an arm (8) is fixed by means of a hinge (15) to a gripper body (1), which arm is rotated relative to the body (1) by means of an assembly (16) for swinging the gripper from vertical position to horizontal position for emptying a collection pocket (7), and the upper part of the arm (8) has a swinging device (17) for swinging the gripper and an assembly (18) between a handle (19) and the pivot device (17) for holding the gripper substantially in an upright position during the collection of trees. The device comprises a frame (1) to which hinged arms (2a) and (2b) are pivotally connected by means (3) through joints, characterized in that the arms (2a) and (2b) are arranged to accommodate between them a cutting blade (4) for cutting trees using the pivotal movement of the arms. 2. Apparatus according to claim 1, which comprises horizontally pivotable closing devices, preferably four, and which are opened by means of an assembly (9) which rotates by means of an arm (11) a vertical axis (10) located on both sides of the the device, characterized in that the arms (12) which rotate the rods (13) are connected to the shaft (10) and to which the arms have springs arranged to allow the trees to pass through the closing devices and which rods with a movement in a different direction open the latches for relief of the trees from the gripper.