FI97015B - Harvester - Google Patents

Abstract

The object of the invention is a harvester, which comprises a suspension device 6 for supporting the harvester on a boom arrangement, a feed device 4 for conveying the tree through the machine, a limbing blade 3 for removal of the branches from the trunk, a saw device 5 for felling the tree and cross-cutting the log and a bundling device 2 for binding the stripped branches into a bundle. The bundling device 2 consists of at least a ring-shaped support 12 in front of the limbing blade 3 for collection of the trimmed branches and devices 8, 9, 13, 16 for bring the wire around the bundle and tying this to form a closed link. <IMAGE>

Description

97015

HARVESTER

The invention relates to a harvester comprising a suspension device for supporting a harvester from a boom device, a feeding device for conveying wood 5 through a machine, pruning blades for removing branches from a trunk, a sawing device for felling wood and cutting the trunk, and a bundling device for tying pruned branches.

Recovery of felling residues can be enhanced by bundling 10 residues. This improves the transport frequency and facilitates the collection and feeding of residues to the chipper. In addition, bundling of residues immediately at harvest can prevent stones and soil from mixing with the residue. A logging machine is known in which a small wood bundler is mounted on the base of a forest trailer, with which 15 several frames are tied into a bundle. The device comprises a feeder mounted on a trailer and a bundler built in a closed circumference. At present, mechanical timber harvesting takes place in Finland using single-arm harvesters with feeders and pruning blades connected to a felling machine. The above-mentioned device is not suitable for use with a harvester. When the harvester takes the tree in its grapple, there must be no structures in the direction of the tree that prevent this. For this reason, closed perimeter structures for bundling are not possible.

The object of the invention is to provide a harvester in which the bundling device does not interfere with the basic functions of the harvester. The characteristic features of the invention are set out in the characterizing part of the appended claim 1. According to the invention, the harvester bundling device comprises means for passing the wire around the bundle 30. In any case, the support means included in these means can be opened or turned so that the harvester can grip the felled wood without hindrance.

The invention will now be described with reference to the accompanying figures, which show a harvester according to the invention.

Figure 1 shows a harvester with a bundling device seen from the side and a bunch of twigs forming.

Figure 2 shows the tying of the bundle with a bundling device.

40 Figure 3 shows the bundling device seen from the feed direction.

2 97015

In Figures 1-3, the device is shown schematically with reference numeral 1 showing a conventional harvester without a bundling device and reference numeral 2 showing a bundling device belonging to a harvester. A conventional harvester 1 comprises pruning blades 3, a feeder 5 (roller or roller) and a sawing device 5. The harvester is supported by a hanging device 6 which allows it to be turned vertically between horizontal positions. The bundling device 2 comprises a fixed part 7 and an extension 10 telescopically connected to it. The fixed part 7 comprises a circumferential support 12 which can be opened from a closed position 10 to an open space. The extension part 10 comprises press arms 11 and binding members 8, 9, 13 and 16. As shown in Figure 3, the binding members comprise arms 8 by means of which the rim 9 can be turned into a nearly closed circumference. The rim can be rotated by means of roller devices 14 around the circumferential parts 8 to convey the wire guide member 13 15 (hook) around the bundle. Reference numeral 16 schematically shows a binding device which forms a knot or other weave in a thread drawn around a bundle.

According to Figure 2, at least 20 ring ties 19 of yarns are preferably formed in the bundle, most preferably using a naturally degradable inner yarn. Before tying, the bundle is sealed in the smallest possible space with a press grapple 11. Alternatively or in addition, the sealing can be considered to be performed by means of a binding thread. Preferably, a top portion remains in the center of the bundle to support the bundle. The circumferential support 12 may consist of either arcuate arms which are turned into a closed circumference or at one point from an open circumferential arm which is turned to an otherwise open position to collect pruned branches into a bundle. Likewise, the circumferential portion carrying the rim may consist, as described above, of parts pivotable against each other or of a portion to be rolled along a circumferential path, which further carries said rim portion on its circumferential path. Thus, both permanently mounted parts and parts rotatable or pivotable at the openings left by them can be used to support the bundle. In the above example, 35 support members of only one type were used. The device may include a finger member known per se which holds the branches of the pruned trunk in place when collecting a new batch of branches in the same bundle. Such a 3 97015 finger member is pulled to the side when squeezing a new batch of twigs into the old bundle.

The binding member can be formed using known solutions. These are known e.g. pulp and hay balers. As such, metal or plastic wire can also be used as the wire. The metal wire makes the chipper difficult to operate. Plastic wire can be joined by melting, which may simplify the binding device, but it is likely to cause its own problems. 10 Leaving pieces of plastic cord in the environment is harmful to the environment. Pulp mills avoid bringing in all the plastic on the mill site, which would probably not be possible to prevent. By thread is generally meant here any binding member, e.g. also a tape or a closable collar.

Such a device is also suitable for collecting several small trunks in the same bundle, so that the device can be used for first thinning or for the treatment of seedlings. The device is applicable to both single and double lever harvesters.

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Claims (6)

97015 A harvester comprising a suspension device (6) for supporting a harvester from a boom device, a feed device (4) for conveying wood 5 through a machine, pruning blades (3) for removing branches from a trunk, a saw device (5) for felling and chopping a tree and a bundling device (2) for pruning pruned branches , characterized in that the bundling device (2) comprises at least one circumferential support (12) on the front side of the pruning blades (3) for collecting the pruned branches and means (8, 9, 13, 16) for passing the wire around the bundle and tying it into a closed loop. Harvester according to Claim 1, characterized in that the bundling device comprises a fixed part (7) connected to the harvester body (1) and a second part (10) telescopically connected thereto, in which the wire transport device (8, 9, 13) and the tying device (16) are mounted. . Harvester according to claim 2, characterized in that said circumferential support (12) is mounted on a fixed part (10) of the bundling device (2). Harvester according to Claim 2 or 3, characterized in that the wire conveying device comprises a circumferential part (8), a rim (9) provided with wire holding elements (13) mounted thereon, which is adapted to rotate around the circumferential part (8). Harvester according to one of Claims 1 to 4, characterized in that it comprises a compression groove (11) for sealing the bundle. » Harvester according to one of the preceding claims 1 to 35, characterized in that the circumferential support (12) is formed by an open circumferential arm slidably connected to the frame on a circumferential path, the open point of which is rolled in the direction of the wood to be felled. li 97015