JP2015149897A - Branch cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a branch cutter comprising a device capable of slowly and certainly feeding a cut tree upon cutting branch of the tree.SOLUTION: A branch cutter comprise: a pair of upper feeding spike rollers (17) which are arranged on a frame (1) in the longitudinal direction with an interval and are driven in a synchronized manner by a hydraulic motor (18) fixed on both sides of the frame; supporters (23) which are rotatably arranged in the horizontal direction on a link (21) pivotally connected on a frame part extending from both sides of the frame and extend in the forth and back direction; pairs of side feeding spike rollers (25) which are rotatably arranged on their respective supporters and rotatably driven by hydraulic motors (24) fixed on the supporters; and hydraulic cylinders (26) rotating the link so that the side feeding spike rollers (25) are closed toward a center longitudinal plane surface of the branch cutter.

Description

  The present invention relates to a branching tree that has been cut down, and more particularly to a branching tree that cuts a tree to a predetermined length while removing branches.

  This type of branching machine includes a frame that is suspended from a suspension attachment attached to the tip of a boom arm of a forest work vehicle with a boom arm and is selectively positioned vertically or horizontally. In a protective box fixed to the proximal end of the frame, a chain saw mounted so as to swing when cutting, and a pair of front and rear, left and right are pivotally connected to the frame, and the hydraulic cylinder is opened and closed around the pivot connection point A knife mounted near the distal end of the frame and driven by a hydraulic feed motor, and an arm that is pivotally connected to the frame between the front and rear knives. A pair of left and right side-feeding spike rollers that are opened and closed around a connecting point and that are each driven to rotate by a hydraulic motor; It includes arranged fixed blade at the distal end of the frame, a. To cut down a standing tree, hold the tree from the left and right with a knife and a feed spike roller with the branching machine in a vertical orientation, and then cut the tree at a position close to its root with a chain saw. The next operation is to cut the cut down tree to a predetermined length with a chain saw while debranching to make a log. The debrancher is in a horse riding state on the cut down tree, the knife and the side feed spike roller hold the tree, and the top feed spike roller and the side feed spike roller are rotated by a hydraulic motor to feed the wood toward the chain saw. . In the process, the branch hits the fixed blade and the front, rear, left and right knives and is cut.

  In order to successfully debranch with fixed blades and knives, it is necessary for the branches to hit these blades and knives with a strong force. Therefore, the feed speed of the tree due to the rotation of the upper feed spike roller and the side feed spike roller is 5 Generally, it is set at a high speed of 6 m / sec. Such high-speed feeding of trees can scatter scattered branches and is very dangerous. Also, because the upper feed spike roller is displaced with respect to the left and right side feed spike rollers, it becomes difficult to feed due to slippage with one or more of the feed spike rollers due to bending of the tree or the like. In order to correct this, the left and right feed spike rollers are strongly pressed against the tree, but this makes it more difficult for the tree to come into contact with the frame of the branching machine.

  The present invention has been made in order to solve these problems, and provides a debranching machine having a feeding device capable of slowly and reliably feeding a tree upon debranching a cut down tree. It is for the purpose.

  The above-described object of the present invention is to provide a chain saw mounted in a protective box fixed to the proximal end of the frame so as to swing upon cutting, and a pair of frames that are pivotally connected to the frame in the front, rear, left, and right directions. A knife that opens and closes around a pivot connection point, a wood feed device that includes a top feed spike roller and a side feed spike roller that are attached to the frame and driven to rotate by a hydraulic motor, and is disposed at the distal end of the frame In a tree branching machine including a fixed blade, the tree feeding device is mounted at a substantially central portion of the frame with a space in the front and rear direction and is driven to rotate synchronously by hydraulic motors fixed to both outer sides of the frame. A pair of upper feed spike rollers and a lower part of a link pivotally connected to a frame portion extending from both sides of the frame, and is pivotably mounted in the horizontal direction. A horizontal support extending in the front-rear direction, a pair of side feed spike rollers rotatably mounted on the support and driven to rotate by a hydraulic motor fixed to the support, and pivotally attached to the link And a hydraulic cylinder for rotating the link about the pivot connection point to open and close the side feed spike roller toward the central vertical plane of the debranching machine. Achieved by providing a tree debrancher.

  In a preferred embodiment of the present invention, it is desirable that the support is attached to a fixed central axis provided at a link portion extending from the pivot connection point so as to be rotatable in the horizontal direction around the axis. In addition, a pair of spring receiving pieces are fixed to both sides of the link on the support body, and a rod-shaped spring extends through the link portion, and both ends thereof are received by the vertical grooves of the spring receiving piece and fixed to the link portion. The stopper piece enters the groove of the spring receiving piece with a gap, the horizontal rotation of the support is limited to the gap, and the bar spring acts as a return spring by being bent by the rotation of the support. To do. In order to more effectively tighten the side spike roller with respect to the wood, it is desirable that the upper feed spike roller and the side feed spike roller are on substantially the same vertical plane. Each pair of side feed spike rollers is connected by a sprocket chain to synchronize their rotation.

[Action]
In the same way as the conventional one, the branching machine closes the knife around the pivotal connection point by the operation of the hydraulic cylinder in the state of riding on the cut down tree so that the knife can hold the tree. The feed spike roller comes into contact with the tree from above, then the hydraulic cylinder is operated to rotate the arm around the pivot connection point so that the side feed spike roller contacts the tree from the side, and then the top feed The spike roller and the side feed wheel are rotationally driven by a hydraulic motor to feed the wood to the chain saw for a predetermined length. In that process, the branch hits the fixed blade and the front, rear, left and right knives and is cut.

It is a side view of the debranching machine by this invention. It is the top view seen from the bottom of the branching machine of this invention. It is the front view which looked at the proximal end of the branching machine of this invention. It is a front view which shows the motion of a side feed spike roller.

  Referring to FIGS. 1 to 3 of the drawings, a tree branching machine according to the present invention is suspended from a suspension attachment attached to the tip of a boom arm of a forest work vehicle with a boom arm (not shown), It includes a frame 1 that is selectively positioned vertically or horizontally. In a protective box 2 fixed to the proximal end of the frame 1, there is provided a chain saw 3 (see FIG. 2) mounted so as to swing upon cutting. A pair of knives 6a, 6b and 7a, 7b are pivotally connected 4, 5 to the front and rear frame portions 8, 9 of the frame 1, and one end is pivotally connected to the upper end of the knife by 10, 11, The other ends of the hydraulic cylinders 14 and 15 are connected to the frame parts 8 and 9 so as to be rotatable at 12 and 13, and are opened and closed around pivot connection points 4 and 5.

  The wood feed device 16 includes a pair of upper feed spike rollers 17 and 17 that are mounted at a substantially central portion of the frame 1 with a space in the front and rear thereof. The upper feed spike rollers 17 and 17 The hydraulic motor 18 fixed to the outside is synchronously driven to rotate. The wood feeder 16 is further provided with links 21 and 21 that are pivotally connected 20 and 20 to frame portions 19 and 19 extending from both sides of the frame 1, and fixed portions 21a and 21a that are extended from the pivot connection point. The support members 23 and 23 are attached to the support members 23 and 23 so as to be rotatable in the horizontal direction about the central shaft 22 and extend in the front-rear direction. A pair of side feed spike rollers 25 and 25, which are driven to rotate by hydraulic motors 24 and 24, and upper link portions 21b and 21b of the links 21 and 21, respectively, are pivotally connected. , 20 and hydraulic cylinders 26, 26 for closing the side-feed spike rollers 25, 25 toward the center vertical plane of the deburring machine. Each pair of side feed spike rollers is connected by a sprocket chain 28 to synchronize their rotation.

  As is apparent from FIG. 1, a pair of spring receiving pieces 23a, 23a are fixed to the support bodies 23, 23 on both sides of the link, and a rod-shaped spring 23b extends through the link portion 21a. It is received in the longitudinal grooves 23c, 23c of the spring receiving pieces 23a, 23a. In order to limit the rotation of the support 23, 23 to the difference in the diameter of the tree (about several millimeters) between the front and rear side spike rollers, stopper pieces 23d, 23d fixed to the link portion 21a are spring receiving pieces 23a. , 23a (see FIG. 3) with a gap corresponding to the diameter difference of the tree. The support bodies 23 and 23 can be rotated in the horizontal direction by this gap, and the bar-shaped spring 23b acts as a return spring by being bent by this rotation of the support bodies 23 and 23. It is clear that this rotation of the support is caused by the movement of the front and rear side feed spike rollers with respect to the tree caused by the difference in the diameter of the trees (several millimeters) between the front and rear side feed spike rollers.

  The hydraulic motors 18 and 24 are preferably of low speed and high torque in order to feed the tree by the upper and side feed spike rollers at a slow speed such as 1 m / sec. Each of the upper feed spike rollers 17, 17 and each of the side feed spike rollers 25, 25 are preferably on substantially the same vertical plane in order to more effectively tighten the side spike roller against the tree. Finally, a fixed blade 27 for disposing branches is arranged at the distal end of the frame.

  The branching machine is suspended from the suspension attachment attached to the tip of the boom of the forest work vehicle like the conventional ones, and in order to cut down standing trees, the branching machine is turned vertically and the upper feed spike roller 17 and 17, the knife 6a, 6b, 7a, 7b and the side feed spike rollers 25, 25 hold the tree from three directions, and then cut the tree at a position close to its root by a chain saw. In order to hold the wood, the knives 6a, 6b, 7a, 7b are closed around the pivotal connection points 4, 5 by the actuation of the hydraulic cylinders 14, 15 associated therewith, and the side-feeding spike rollers 25, 25, the links 21 and 21 are rotated about the pivot connection points 20 and 20 by the operation of the hydraulic cylinders 26 and 26 associated therewith, and are closed via the supports 23 and 23.

  In order to make the cut tree into a log, the tree is cut into a predetermined length with a chain saw while removing the branches. Therefore, the branching machine is in a horse riding state on the cut down tree, and the upper feed spike rollers 17 and 17, the closed knives 6a, 6b, 7a and 7b, and the side feed spike roller are operated in the same manner as described above. 25 and 25 hold the tree. At that time, since the upper feed spike roller and the side feed spike roller are substantially on the same vertical plane, the side spike roller can be more effectively tightened against the tree. Next, the upper feed spike rollers 17, 17 and the side feed spike rollers 25, 25 are rotated by hydraulic motors 18, 24, 24, respectively, so that the tree can be rotated at a low speed such as 1 m / sec as described above. Send it to No. 3. In the process of feeding the tree by the feed spike roller, the tree branch hits the fixed blade 27 and the front, rear, left and right knives 6a, 6b, 7a, 7b and is cut. The rotation of the hydraulic motor stops when the tree is fed a predetermined length, and then the chain saw 3 swings to cut the stopped tree. This operation of the debranching machine is repeated repeatedly to produce many logs debranched from a single tree.

  According to the present invention, since the tree feeding device is composed of six feeding spike rollers, the feeding of the tree by the spike roller is always viewed with certainty, and even if a bending of the tree is encountered, the feeding is not missed. Moreover, the pair of side feed spike rollers on the left and right sides follow the shape of the tree well because the support body is rotated toward the tree. Further, since the rotation of each pair of side feed spike rollers is synchronized, there is no inconvenience in feeding wood by the side feed spike rollers. In addition, according to the present invention, since each top feed spike roller and side feed spike roller are in the same vertical plane, even if the side feed spike roller is strongly pressed against the wood, the wood is the top feed spike roller. Since it is received, there is no inconvenience that it is pressed against the frame of the branching machine.

DESCRIPTION OF SYMBOLS 1 Frame 2 Protection box 3 Chain saw 6 Knife 7 Knife 14 Hydraulic cylinder 15 Hydraulic cylinder 16 Wood feed device 17 Top feed spike roller 18 Hydraulic motor 21 Link 22 Fixed central shaft 23 Support body 24 Hydraulic motor 25 Side feed spike roller 26 Hydraulic cylinder 27 Fixed blade

Claims (5)

  In a protective box fixed to the proximal end of the frame, a chain saw mounted so as to swing when cutting, and a pair of front and rear, left and right are pivotally connected to the frame and opened and closed around the pivot connection point by a hydraulic cylinder And a wood feed device including a top feed spike roller and a side feed spike roller mounted on the frame and driven to rotate by a hydraulic motor, and a fixed blade disposed at the distal end of the frame. In this debranching machine, the wood feeding device is mounted at a substantially central portion of the frame with a space in the front-rear direction and is driven to rotate synchronously by hydraulic motors fixed to both outer sides of the frame. A link pivotally connected to a frame portion extending from both sides of the frame, and a support provided on the link and extending in the front-rear direction. A pair of side feed spike rollers that are rotatably mounted on the support and are driven to rotate by a hydraulic motor fixed to the support, and the link is rotated about a pivotal connection point to perform side feed. A tree branching machine comprising: a hydraulic cylinder for closing the spike roller toward the central longitudinal plane of the branching machine.   The branching machine according to claim 1, wherein the support body is attached to a fixed central shaft provided in a link portion extending from a pivot connection point so as to be rotatable in the horizontal direction around the shaft.   A pair of spring receiving pieces are fixed to both sides of the link portion on the support body, and a rod-like spring extends through the link portion, and both end portions thereof are received in the longitudinal grooves of the spring receiving piece, The deburring machine according to claim 1, wherein the fixed stopper piece enters the groove of the spring receiving piece with a gap.   2. The tree debranching machine according to claim 1, wherein each upper feed spike roller and each side feed spike roller are on the same vertical plane.   2. The tree debranching machine according to claim 1, wherein each pair of side feed spike rollers is connected by a sprocket chain to synchronize their rotation.

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