FI118074B - Tipping and loader grapple - Google Patents

Description

118074

1., FALLING AND LOADING DOG

The invention relates to a tipping and loader grapple for hanging at the end of a boom for a machine moving in the forest, comprising a rotating device acting as a suspension member and a device body attached thereto, wherein the device body is an articulation fastening is provided between the intermediate frame, such as a pivot pin, wherein the device frame is pivotable about said pin to provide different working positions on the device frame and the wood cutting blade is a blade disposed in the intermediate space of the grapple

Harvester head tools for felling, trimming and pruning, especially grapple pruning blades, have had some load on the timber. However, this would not be the case on a larger scale when the expensive harvester was then in a secondary position. Also loading with pruning blades easily damages the sharpened edges of the blades in rocky terrain.

Known as a combined tipping and loader grapple, among others. The Finnish advantage is the · • · Dump Model 3524 combi-grapple, in which the harvester head includes separate loading • * • · grapples in addition to the pruning blades. This solution extends the harvester head, increases its weight and • * · ·. ** ·. manufacturing costs. When loading, the pruning blades must first be fully folded and * * * • the drive rollers must also be pivoted away from the loading line.

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A well-functioning combination grove capable of cutting, pruning and loading large trees is quite difficult to achieve. The present invention, however, * *: surprisingly solves the shortcomings and problems encountered in previous dumpers and loader cranes. The invention is best suited for trimming smaller trees and especially for cases where pruning is omitted. For some trees, pruning is not always necessary. The tipping and loader device according to the invention, having a device body mounted on a rotating device, is characterized in that, during the loading operation, the blade disc is · ··: removable, displaceable or pivotable from its cutting position.

118074 2

An advantage of the invention is that heavy loading arms which are not susceptible to damage can be used for loading. The cutting is preferably performed by means of a sharpened edge blade which does not require any separate power unit. Such a blade disc is easy to remove during loading or can also be removed. The machine requires hydraulic pressure with separate piping only to rotate the machine and move the grapple arm. The movements of the pivoting cylinder of the device are obtained by special rigidity utilizing the fluid pressure of the grapple cylinder.

The invention will now be described, by way of example, with reference to the accompanying drawing, in which

Figure 1 is a front view of a tipping and loader grapple in a tipping position.

Figure 2 is a side view of the tipping and loader grapple in the tipping position.

Figure 3 is a side view of the tipping and loader grapple in the loader position. *

Fig. 1 shows a grapple according to the invention to be hung at the end of a forestry machine boom by means of articulation means 7. Below the attachment means is a grapple rotating device 6 which also includes hydraulic fluid passages for grapple actuators, such as a grapple cylinder 5. Below the rotating device 6 is a device body 1a, Ib to which the loader grapples 2a, 2b are known per se to open and close. In the intermediate space of the loader grabs 2, a blade disc 3 is provided with a sharpened edge 4. When the wood to be felled or cut is pressed by the grapple 2, the grapple will eventually squeeze the wood - »* · • · · · 3 has penetrated through the tree trunk, breaking it.

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The apparatus is suitable for cutting wood, preferably less than 20 cm in diameter.

• · / * · * In the device body, the plate-like parts la and Ib are joined by plate 14 so that the parts la and Ib are not · · * * ". * Merely tied to each other by the pivot pivots.

• · • «* · ·. Figure 1 shows the attachment of the blade disc 3 to the device body Ib by means of bolts 12. Thus, when loading with a grapple, even larger trunks than 20 cm in diameter have to be removed first to release the grapple space for fully loaded trees.

• · · * [One way to fix the blade disc 3 is to move it or *. * turns away from the 2 intermediate positions of the grapple.

• · ·· m • · • · ·. Figure 2 shows a grapple device from the side showing a spacer body 9 attached to a flange 13 located below the rotating device 6. At the lower end of the spacer body 9 there is a pivot pin 10 provided with a hinged attachment of the device la, Ib. The device body 1a, Ib is pivotable about the pivot point 10 by about 90 ° by means of a pivoting cylinder 11 located in the cover of the intermediate body 9.

In Fig. 3, the device body 1a, Ib is pivoted down by the pivoting cylinder 11 to the loader position. The blade plate 3 has been removed and the grabs 2 can be used to load the timber.

In the preferred embodiment, no separate pressure hoses are provided to the swing cylinder 11. The operation of the cylinder 11 can be traced so that it receives the pressurized fluid from the pressure line of the grapple cylinder 5. One way is to introduce the pressurized fluid into the cylinder 11 when the grapple cylinder has been driven to the extreme position and the pressure in the inlet pipe exceeds a certain pressure. If the pressure value exceeds a certain limit, the valve from the inlet pipe adjacent to the cylinder 5 opens to the cylinder 11. The control may also be such that time is involved. For example, if in the extreme position of the grapple cylinder 5 the maximum pressure is maintained for 3 seconds, the valve opens to the cylinder 11.

The cylinder 11 is controlled, for example, so that in the maximum position of the opening of the grapple cylinder 5 at the maximum opening pressure, the valve opens to pivot the device body 1a, Ib up to the pouring position. The grapple cylinder 5 has the grapple closed position in the extreme position or if. the wood is between the grabs at maximum pressure, the valve causes the cylinder 11 to turn 1 * · · • · I.; the device body la, Ib down to the loading position. With this arrangement, when the prongs 2 • * · • * I are squeezed across the wood, the cylinder 11 will eventually start to fall during or at the end of t '^ when the wood is viewed from the intermediate frame 9 away from the grapple. This will make the felling of wood easier, and also in the desired direction.

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When using a grapple as a loader, it is preferable to lock the device body la, Ib down for loading. position so that the logic or other valve stroke does not tilt the device body to the tilt • · * position because it is not usually needed during loading. The device body can be locked * * · *. to the loading position, e.g. mechanically, by attaching to the device body e.g. a part la * · · · • · f t i. The hydraulic locking can be done by locking the cylinder 11 or locking another additional cylinder supporting the device body la, Ib or, for example, hydraulically moving a locking member to prevent the device body la, Ib from turning.

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Claims (4)

118074 A tipping and loader grapple for hanging at the end of a boom for a machine for moving in the forest, comprising a rotating device (6) acting as a suspension member and a device frame (1a, Ib) attached thereto, wherein at least one movable grapple device and (3, 4) for cutting wood, and that the device body (1a, Ib) is secured to the pivoting device (6) by means of the intermediate frame (9) and an articulation such as a pivot pin (10) is provided between the device body (1a, Ib) and the intermediate body (9) ), wherein the device body (1a, Ib) is pivotable about said pin (10) about 90 ° to provide different working positions on the device body, and wherein the wood cutter blade has a blade plate (3) disposed in the intermediate space of the grapple arms (2a, 2b); ) The wood to be cut against the grapple is adapted to fall down when closing the grapple, characterized in that during the loading operation the blade plate (3) is removable, movable or turn away from its cut-off position. A tipping and loader grapple according to claim 1, characterized in that when the cutting blade (3) is moved out of the intermediate space of the grapple arms, the pivoting of the device body (1a, Ib) can be locked by mechanical or hydraulic locking means. • · · *. ; * 3. A grapple and loader grapple according to claim 1, characterized in that the loading • · · • · *; a pair of corn grabs (2a, 2b) is arranged to cut the wood as a means for holding the wood. • M ···· • · · # · * · Pouring and loader grapple according to claim 2, characterized in that the fluid pressure applied to the hydraulic cylinder (11) is arranged to be taken from the pressure line of the grapple cylinder (5) * when the pressure line is in a pressurized state. ♦ · • «• ♦ · ···« * • #