JPH06113687A - Hydraulic pruning machine - Google Patents

Abstract

PURPOSE:To surely perform the pruning of a tree by mechanical means. CONSTITUTION:Receiving edges 8, 8 are attached to the side faces 7 of a pair of claws 4a, 4b of a grapple 1 to be used at a mountain base or an intermediate place. A cutting edge 9 curved upward is pivoted to a shaft 10 inserted into a reinforcing shaft 3 at the base of the claw 4b. A protection plate 12 directing toward the claws 4a, 4b is formed on the inside of the cutting edge 9. When a branch Z is clamped with two claws 4a, 4b and the protection plate 12 of the grapple by actuating a hydraulic cylinder 5, the cutting edge 9 is turned toward the claws 4a, 4b as shown by the two-dot chain line in the figure by a hydraulic cylinder 11 and the branch Z clamped with the claws 4a, 4b and the protection plate 12 is cut by the scissors-like action of the cutting edge and the receiving edges 8, 8.

Description

Detailed Description of the Invention

[0001]

[Field of Industrial Application] The present invention relates to a hydraulic delimbing machine for mechanically delimbing trees in a field work.

[0002]

2. Description of the Related Art In the forestry industry, research and development have been progressing in recent years, and even in the field, active efforts for mechanization by introducing grapple saws are being promoted. In recent years, in the forestry industry, a whole-trunk collecting method has been widely used to reduce the cost of collecting trees by using a wire or a bulldozer to pull trees that have been felled in the mountains to the collecting site. Logs are pruned and cut into pieces on the spot.

Among the above-mentioned operations, in the branch removing work, while a worker moves between trees piled on the ground, the chainsaw held in his hand is applied to the trunk of the tree to cut the branches.

[0004]

At present, in the field work, the ball cutting work is mechanized by using a hydraulically operated power shovel equipped with a grapple saw. As for regular defoliation of hardwood, there is no machine that can be used until now, and we have no choice but to rely on human labor, which is a bottleneck for mechanization on the mountain floor and intermediate soil fields.

Further, in the delimbing work, it is necessary to treat a worker who is specialized in delimbing, and further, the work has to cut the branches one by one by penetrating between the unstable trees. There is a danger that the stacked trees will collapse. Not only that,
Due to the instability of the scaffolding, there is a lot of injuries due to the physical strain such as the need to bend over the waist, which hinders the efficient operation of the power shovel with a grapple saw.

Therefore, in order to improve the conventional drawbacks, the present applicant has previously proposed a hydraulic pruning machine which can prun wood branches safely and easily (Japanese Patent Application No. 3125030).
As disclosed in the publication, as shown in FIG. 3, receiving blades 33, 33 are attached to one side surface of the claws 32a, 32b of the grapple 31, respectively, while the cutting blade 34 has a base of the claw 32b. Is rotatably supported by a reinforcing shaft 35 of the grapple 31 by the operation of the hydraulic cylinder 37.
After the branches 2a and 32b are sandwiched, the cutting blade 34 is moved to the position 2 in the drawing.
It rotates in the direction of the claws 32a and 32b as indicated by the dotted line, and cuts the branch Z with the receiving blade 33.

However, while the hydraulic branch remover according to the above application has an advantage of being safe and easy to work, when the branch Z is removed, the part of the cutting blade 34 between the claws 32a and 32b is lowered. Since the cutting blade 34 is curved and protrudes, when the cutting blade 34 is rotated, the thin branch is pushed by the curved portion under the cutting blade 34, and the claw 32a or 32b is indicated by an arrow shown on both sides of the branch Z in FIG. Since the branch Z slides along the curved portion of the branch, the branch may not be cut.

On the other hand, although the grapple is originally for gripping a log, in the grapple 31 of the above application, when the log is simply gripped without branch cutting, the curved portion under the cutting blade 34 hits the log and becomes a log. There is a problem that it is easily scratched and the cutting blade 34 is also damaged.

The present invention remedies the deficiencies of the previous application and provides safety,
(EN) It is possible to provide a hydraulic debranching machine that can easily and surely remove a branch and can prevent a cutting blade from hitting a log when simply gripping the log.

[0010]

SUMMARY OF THE INVENTION According to the present invention, a receiving blade is attached to one side surface of two claws of a grapple that operates hydraulically to sandwich a tree, while the other claw of one claw of the grapple is the same. A cutting blade curved toward the upper side is axially supported on the side surface, and the cutting blade rotates along the grapple side surface with the shaft fulcrum as an axis by hydraulic pressure, and with a receiving blade attached to the grapple side surface. On the other hand, the hydraulic branching machine is configured to cut off a branch, and on the other hand, a protective plate is formed inside the cutting blade and the receiving blade.

The operation of the hydraulic system is such that the hydraulic oil flows into the hydraulic cylinder of the cutting blade after the two claws of the grapple have been actuated to be completely closed or the motion of the claws has stopped due to the sandwiched branch. On the contrary, when the hydraulic oil is drained, the pawl is opened after the hydraulic cylinder of the cutting blade is activated.

On the other hand, the cutting blade is a concave portion in which the space between the two claws of the grapple is curved upward, and the claw 4a is provided at the center of the grapple body inside the cutting blade and the receiving blade.
A protective plate is formed in the 4b direction. The protective plate may be separately attached to the grapple body. The protective plate has a flat tip, and has a height such that the cutting edge does not hit the surface of the log when the log is gripped, and the height is such that it does not hinder the removal of branches.

[0013]

The present invention has the above-described structure and operates the hydraulic system to cut off the branches of the tree to be the grapple.
Hold it with the nail of a book. When the two claws are closed, the branch is sandwiched and fixed by the two claws and the protective plate.

When the branch is fixed as described above, hydraulic oil is supplied from the hydraulic system to the hydraulic cylinder of the cutting blade,
The cutting blade attached to one side surface of the nail of the book rotates along the side surface of the nail, and the receiving blade attached to the side surface of the nail and the rotating cutting blade are like two blades of scissors. You can cut the branches of trees.

In this case, since the upper part of the branch sandwiched by the two claws is in contact with the protective plate, there is no possibility that the branch slips along the side edge of the claw when sandwiched by the two claws. Therefore, when the cutting blade is rotated, the branch can be reliably caught and cut by the cutting blade and the receiving blade.

On the other hand, when the log is gripped by using the grapple, the cutting edge portion does not hit the log and the log is not damaged. Therefore, the log can be grasped by using this grapple, and can be used both for the branch cutting work and the work for grasping the log.

In addition to the movement of the cutting blade, the hydraulic system used to open and close the claws of the grapple can be used as it is, and the claws are stopped after the claws of the grapple are closed or due to a pinched branch. After that, the hydraulic circuit can be switched and rotated, so the delimbing can be performed reliably,
The operator need only operate the hydraulic system.

That is, according to the present invention, a receiving blade and a cutting blade which can rotate along the side surface of the grapple are attached to the side surface of the grapple, and the rotation of the cutting blade is directly used by the hydraulic system used for opening and closing the claws of the grapple. In addition, it is possible to open and close the grapple's claws and rotate the cutting blade without performing any special operations, and it is possible to reliably sandwich and cut a branch between the cutting blade and the receiving blade, and there is a protective plate on the top. Since there is, the sandwiched branch does not slip along the end on the claw side, and debranching can be reliably achieved.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows one embodiment of the present invention, and the present invention will be described in detail with reference to the drawings. Grapple 1
Are attached with the bases of the claws 4a and 4b to the reinforcing shafts 3 attached to both side ends of the upper support plate 2, respectively.
The hydraulic cylinders 5 mounted on both side surfaces of the claws 4a and 4b rotate in the directions of the claws facing each other around the rotation axis as an axis, and the branch can be sandwiched between the two claws 4a and 4b. A rotator 6 is attached to the upper support plate 2 and a hydraulic circuit is incorporated therein.

On the other hand, one side surface 7, 7 of the claws 4a, 4b.
In addition, receiving blades 8 and 8 are attached respectively, and a cutting blade 9 is attached to the same side surface 7 of the claw 4a. The cutting blade 9 is curved upward between the claws 4a and 4b,
Further, it is rotatably supported by a shaft 10 inserted into a cylindrical reinforcing shaft 3 at the base of the pawl 4b, and is rotated about the shaft 10 by a hydraulic cylinder 11 and along the side surface 7 of the pawl in the directions of the pawls 4a and 4b. can do.

On the other hand, the claws 4a and 4b are provided inside the cutting blade 9.
A protection plate 12 attached to the side is formed, and the branch to be cut off can be firmly fixed by the protection plate 12 and the two claws 4a and 4b. Reference numeral 13 in FIG. 1 is a guide bar for guiding the tip of the cutting blade 9.

FIG. 2 shows an operating state of the present invention. When hydraulic pressure is actuated to close the claws 4a and 4b to sandwich the branch Z of the tree and the claws 4a and 4b stop moving, When the hydraulic circuit is switched and hydraulic fluid is sent to the hydraulic cylinder 11, the cutting blade 9 rotates as shown by a two-dot chain line in FIG.
The branch Z fixed by being sandwiched between the claws 4a and 4b can be cut off by the cutting blade 9 and the receiving blades 8 and 8.

In this case, when the branches of the tree are cut off, since the protective plate 12 is formed, the branch Z sandwiched between the two claws 4a and 4b is firmly fixed, and the cutting blade 9 is upward. Since it is curved in the direction, when the cutting blade 9 is rotated, the branch Z does not slip at the inner end of the claw 4a or 4b,
Branches can be reliably cut off with the receiving blades 8, 8.

That is, according to the present invention, a cutting blade and a receiving blade are attached to a grapple which is commonly used, and a branch which is sandwiched by the claws of the grapple and fixed can be easily cut off by using hydraulic pressure. Z does not slip on the inner edge of the claw, and the branches can be cut off reliably. Further, the present invention can be easily applied to not only conifers but also broad-leaved trees. Therefore, the operator can mechanically operate the pruning without climbing up the piled trees as in the conventional case, and the work efficiency of the pruning can be significantly increased.

[0025]

INDUSTRIAL APPLICABILITY As described above, the present invention makes it possible to easily mechanically process a tree using a grapple, which has conventionally been used to remove the branches of trees, which has conventionally relied on workers. Since it can be cut off into wood and can be applied not only to coniferous trees but also to broad-leaved trees, it is possible to achieve mechanization in mountain beds and intermediate soil fields, and to greatly improve treatment efficiency.

[Brief description of drawings]

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

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

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

FIG. 4 is an explanatory diagram of an operating state of a conventional grapple.

[Explanation of symbols]

 1: Grapple 2: Support plate 3: Reinforcing shaft 4a, 4b: Claw 5: Hydraulic cylinder 6: Rotator 7: Side of claw 8: Receiving blade 9: Cutting blade 10: Shaft 11: Hydraulic cylinder 12: Protective plate 13: Guide bar

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshitaka Nenami 1 711, Shin-shi, Takano-cho, Hiba-gun, Hiroshima Prefecture Koya Forest Products Co., Ltd. (72) Minoru Oe Minamikannon-cho, Nishi-ku, Hiroshima-shi, Hiroshima 7 Hiroshima loader sales company

Claims (1)

[Claims] 1. A receiving blade is attached to one side surface of two claws of a hydraulically operated grapple, and a cutting blade curved toward the upper side is provided on the same side surface of one claw of the grapple. While being axially supported, the cutting blade is configured to rotate by hydraulic pressure along one side surface of the grapple about the shaft fulcrum, and a branch can be cut off with a receiving blade attached to the grapple. On the other hand,
A hydraulic pruning machine, wherein a protective plate is formed inside the cutting blade and the receiving blade.