JPH04325034A - Hydraulic lopping machine - Google Patents

Abstract

PURPOSE:To cut branch, attain mechanization in mount floor and intermediate soil field and remarkably improve treating efficiency by operating a hydraulic system and holding branch of tree to be cut between two pawls of grapple and shutting two pawls. CONSTITUTION:Bed knives 8 and 8 are attached to one side 7 of pawls 4a and 4b of grapple 1 used in mount floor and intermediate soil field. On the other hand, cutting edge 9 is supported on a shaft 10 inserted into a reinforcing shaft 3 of base of pawl 4b and branch Z is held with two pawls 4a and 4b of grapple by a hydraulic cylinder 5 and then these pawls 4a and 4b are rotated by a hydraulic cylinder 11 and branch Z held between pawls 4a and 4b is cut with bed knives 8 and 8 like scissors.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] This invention relates to a hydraulic limber for mechanically delimbing trees in field work.

0002

BACKGROUND OF THE INVENTION Research and development in the forestry industry has been progressing in recent years, and active efforts are being made to mechanize forestry fields by introducing grapple saws. In recent years, in the forestry industry, whole-trunk timber harvesting methods have been widely used in the forestry industry, in which standing trees are harvested in the mountains and are pulled out to the land using wires or bulldozers, etc., in order to reduce the cost of timber harvesting. The trees are cut into logs by removing branches and cutting them into logs in the field.

[0003] Among the above-mentioned operations, in the delimbing operation, a worker moves between trees piled on the ground and cuts branches by applying a chainsaw in his hand to the trunk of the tree.

0004

[Problem to be Solved by the Invention] Currently, delimbing work in earthworks is mechanized by using a hydraulically operated power shovel with a grapple saw. Up until now, there has been no usable machinery available, so we have had to rely on manual labor, which has become a bottleneck for mechanization at mountain and intermediate fields.

[0005] Furthermore, the work of removing limbs requires the use of specialized workers for removing branches, and the work also requires cutting branches one by one by walking between precariously stacked trees. There is a risk that the piled trees will collapse. Not only that, but
Due to the unstable footing, the user must bend over, resulting in many injuries, which also hinders the efficient operation of a power shovel with a grapple saw. SUMMARY OF THE INVENTION An object of the present invention is to provide a limbing machine that improves the conventional drawbacks and contributes to mechanization of limbing.

[0006]

[Means for Solving the Problems] In the first invention, a receiving blade is attached to one side of each of the two claws of a grapple that is operated by hydraulic pressure to sandwich a tree, and a receiving blade is attached to one side of each of the two claws of the grapple. A cutting blade is pivotally supported on the same side, and the cutting blade is configured to rotate along the side surface of the grapple about the pivot point by hydraulic pressure, and to cut the branch with a receiving blade attached to the grapple. The second invention is a hydraulic limber that rotates the cutting blade using a hydraulic system that uses the rotation of the cutting blade to operate the claw of the grapple. The grapple claw can be rotated after it is closed, and conversely, the grapple claw can be opened after the cutting blade has returned to its original position.

[0007] Here, the grapple refers to two claws 31, 31 that are attached facing each other as shown in FIG.
However, due to the operation of a hydraulic cylinder 34 installed above and parallel to the beam 33 connecting the rotating shafts 32, 32 shown in FIG. 4, the claws 31 face each other about the rotating shaft 32. The two claws rotate and cross in the direction of the claws, and the wood is gripped by the intersection of the two claws 31, 31. still,
Reference numeral 35 in FIGS. 3 and 4 is a reinforcing shaft.

According to the present invention, a receiving blade is attached to one side of the grapple as described above, and a cutting blade that can be rotated along the side of the grapple by hydraulic pressure is attached to the same side. The cutting blade at this time is rotated by a hydraulic cylinder connected to the hydraulic system used to rotate the claws of the grapple.

The operation of the hydraulic system is such that after the two claws of the grapple operate and close completely, or the claws stop moving due to a caught branch, hydraulic oil flows into the hydraulic cylinder of the cutting blade. Conversely, when draining hydraulic oil, the claw is opened after the hydraulic cylinder of the cutting blade is activated.

0010

[Operation] The present invention is constructed as described above, and the hydraulic system is operated to clip the tree branch to be cut off between the two claws of the grapple. When the two claws close, the branch is held in place by the two claws.

[0011] When the two claws stop sandwiching a branch as described above, hydraulic oil is supplied from the hydraulic system to the hydraulic cylinder of the cutting blade, and the cutting blade attached to one side of the two claws moves to the branch. The receiving blade, which rotates along the side surface of the claw and is attached to the side surface of the claw, and the rotating cutting blade can cut off a tree branch like two blades of scissors.

[0012] Moreover, the hydraulic system used to open and close the grapple claws can be used as is for the movement of the cutting blade, and the hydraulic system used to open and close the grapple claws can be used as is. Later, since the hydraulic circuit can be switched and rotated, delimbing can be performed reliably, and the worker only has to operate the hydraulic system.

That is, in the present invention, a receiving blade and a cutting blade that can be rotated along the side surface of the grapple are attached to the side surface of the grapple. Moreover, the grapple claws can be opened and closed, and the cutting blade can be rotated without any special operations.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows one embodiment of the present invention. Next, the present invention will be specifically explained with reference to the drawings. The grapple 1 has the bases of claws 4a, 4b attached to reinforcing shafts 3 attached to both ends of an upper support plate 2, respectively.
b is rotated by hydraulic cylinders 5 attached to both sides of the claws 4a, 4b about a rotating shaft in the direction of the claws facing each other, and the branch can be sandwiched between the two claws 4a, 4b. In addition, a rotator 6 is mounted on the upper support plate 2.
is installed, and a hydraulic circuit is built into it.

On the other hand, receiving blades 8, 8 are attached to one side surfaces 7, 7 of the claws 4a, 4b, respectively, and the claws 4
A cutting blade 9 is attached to the same side surface 7 of a. The cutting blade 9 is pivotally supported by a shaft 10 inserted into a cylindrical reinforcing shaft 3 at the base of the claw 4a, and is centered around the shaft 10 by a hydraulic cylinder 11, and extends along the side surface 7 of the claw 4a, 4
It can be rotated in direction b. Note that reference numeral 12 in FIG. 1 is a guide bar that guides the tip of the cutting blade 9.

FIG. 2 shows the operating state of the present invention. When the claws 4a and 4b are closed by hydraulic pressure and a tree branch Z is held between them, and the movement of the claws 4a and 4b has stopped, When the hydraulic circuit is switched and hydraulic oil is sent to the hydraulic cylinder 11, the cutting blade 9 rotates as shown by the two-dot chain line in FIG.
The cutting blade 9 and the receiving blades 8, 8 can cut off the branch Z which is sandwiched and fixed between the claws 4a, 4b.

That is, when cutting off a tree branch, the present invention attaches a cutting blade and a receiving blade to a commonly used grapple, and easily cuts off the branch that is caught between the claws of the grapple and is fixed using hydraulic pressure. Can be done. Further, the present invention can be easily applied not only to coniferous trees but also to hardwoods. Therefore, when removing branches, workers can perform mechanical operations without having to climb up piles of trees as in the past.
It can greatly improve the work efficiency of delimbing.

[0018]

[Effects of the Invention] As described above, the present invention enables easy mechanical delimbing of trees using grapples, which are commonly used, and can be applied to not only coniferous trees but also broad-leaved trees. Therefore, mechanization at the mountain floor and intermediate soil sites can be achieved, and processing efficiency can be greatly improved.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an embodiment of the invention.

FIG. 2 is an explanatory diagram of the operating state of the present invention.

FIG. 3 is a perspective view of a conventional grapple.

FIG. 4 is the opposite side of a conventional grapple.

[Explanation of symbols]

1 Grapple 2 Support plate 3 Reinforcement shaft 4a, 4b Claws 5 Hydraulic cylinder 6 Rotator 7 Side of the nail 8. Receiving blade 9 Cutting blade 10 axis 11 Hydraulic cylinder 12 Guide bar

Claims (2)

[Claims] [Claim 1] A receiving blade is attached to one side of each of the two claws of a hydraulically operated grapple, and the other,
A cutting blade is pivotally supported on the same side of one of the claws of the grapple, and the cutting blade is rotated along one side of the grapple about the pivot point by hydraulic pressure, and a receiving blade attached to the grapple. A hydraulic limber characterized by being able to cut branches with. 2. The cutting blade is configured to rotate after the grapple claw closes and stops, and the grapple claw opens after the cutting blade rotates in the opposite direction and returns to its original state. The hydraulic limber according to claim 1, characterized in that: