JP2014194115A - Crawler type forest work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a forest work machine with crawlers in which work efficiency can be improved by providing fall prevention by keeping a platform, including a cabin and a boom, level when forest work on a slope is performed.SOLUTION: In a crawler type forest work machine (1) that has a platform (4), including a cabin (2) and a boom (3), rotatably mounted on an undercarriage with crawlers (5), a stabilizer (6) is interposed between the platform and the undercarriage body with crawlers. The stabilizer includes a fixed frame (7) that is attached to the undercarriage and a movable frame (8) that is attached to a swivel bearing (14) of the platform (4). The one end of the movable frame is connected to the fixed frame by a fixed shaft (17) so that the movable frame can rotate. A reciprocating type hydraulic cylinder (20) to swing the movable frame about the fixed shaft relative to the fixed frame is connected between the fixed frame and the other end of the movable frame.

Description

  The present invention provides a crawler-type forest work machine suitable for thinning and the like in a forest, and in particular, from the viewpoint of ensuring the stability of the forest work machine when working on an inclined land, platforms such as cabins and booms are horizontally arranged. The present invention relates to a crawler type forest working machine that can be maintained.

  A crawler-equipped forest work machine generally includes a platform including a cabin, a boom, and the like and a vehicle body with a crawler, and the platform is rotated with respect to the vehicle body with a crawler to enable the boom to turn in the left-right direction. It can be made to. At the tip of the boom, an attachment according to the type of work in the forest, for example, a gripping device with a cutter or an excavator device with a carter is attached. In the case of thinning, it is known that these attachments have a mechanism for grasping a standing tree and cutting the standing tree with a cutter.

  Since such thinning work is generally performed on an inclined land, the crawler type forest working machine is tilted back and forth and left and right, and is extremely unstable, and therefore, maneuvering is always forced to prevent the fall. It is known that similar problems occur in excavator work to construct forest roads.

  An object of the present invention is to provide a crawler-equipped forest working machine that can keep the platform including a cabin and a boom horizontal in the above-described forest work on an inclined land, thereby preventing overturning and improving work efficiency. There is to do.

  An object of the present invention is to provide a stabilizer device between a platform and a lower main body with a crawler in a crawler type forest working machine in which a platform including a cabin, a boom, and the like is pivotally attached to a lower vehicle body with a crawler. The stabilizer device includes a fixed frame attached to the lower vehicle body and a movable frame attached to a swing bearing of the platform, and one end of the movable frame is rotatably connected to the fixed frame by the fixed shaft. A crawler type forest working machine in which a double-acting hydraulic cylinder is connected between the fixed frame and the other end of the movable frame to swing the movable frame about the fixed axis with respect to the fixed frame. Achieved by providing.

  According to the present invention, the stabilizer device interposed between the platform of the crawler type forestry working machine and the lower main body with the crawler includes the fixed frame to be attached to the lower vehicle body, and the movable frame to be attached to the swivel bearing of the platform. One end of the movable frame is rotatably connected to the fixed frame by a fixed shaft, the movable frame is connected between the fixed frame and the other end of the movable frame, and the movable frame is fixed to the fixed frame with respect to the fixed shaft. Provided is a stabilizer device for a forest work machine with a crawler, which includes a double-acting hydraulic cylinder for swinging around the center.

  According to the above configuration of the present invention, when the forest work is performed on a sloping ground, the double-acting hydraulic cylinder is hydraulically operated to extend its plunger rod, and thereby the movable frame is moved until the platform becomes horizontal. It swings around a fixed axis with respect to the fixed frame. In leveling such a platform on an uphill or a downhill, it is necessary to turn the platform with respect to the lower vehicle body with a crawler so that the cabin of the forest working machine is directed forward. Thus, by leveling the platform on an inclined land, it is possible to reliably prevent the work machine in the forest from overturning, and it is possible to obtain an optimum state in which an operator in the cabin can visually observe the attachment attached to the tip of the boom. Therefore, the operation of the boom or the attachment becomes extremely easy.

  The stabilizer device according to the present invention separates the platform and the lower vehicle body with a crawler in an existing crawler type forest working machine and interposes them without changing the mechanism between the platform and the separated platform. What is necessary is just to attach to a lower body with a crawler.

It is a side view of the crawler type forest working machine equipped with the stabilizer device according to the present invention. FIG. 2 is a front view of FIG. 1 with a boom and the like omitted. It is a side view of a crawler type forest working machine when a stabilizer device is operated on an uphill. It is a side view of a crawler type forest working machine when a stabilizer device is operated on a downhill. It is a side view of the stabilizer apparatus by this invention. It is a top view of the stabilizer apparatus shown in FIG. FIG. 6 is an end view of the stabilizer device shown in FIG. 5, showing an attachment state between the lower vehicle body with a crawler and the stabilizer device indicated by a broken line.

  1 to 7, the crawler type forest working machine 1 has a stabilizer device 6 in which a platform 4 including a cabin 2 and a boom 3 is interposed between a lower vehicle body 5 with a crawler. The stabilizer device 6 includes a fixed frame 7 and a movable frame 8. The fixed frame 7 includes a pair of side plates 9, front and rear horizontal bars 10, and a mounting plate 11 attached to the lower vehicle body 5. Are a pair of side plates 12 arranged so as to be located outside the side plate 9 of the fixed frame, front and rear horizontal bars 13, a mounting plate 15 attached to the swivel bearing 14 of the platform 4, and a side plate of the fixed frame 7. 9 and a bottom plate 16 that abuts against the upper end surface. One end of the movable frame 8 is rotatably connected to the fixed frame 7 by a fixed shaft 17. Specifically, the fixed shaft 17 is fixed between the side plates 9, 9 of the fixed frame 7, and is positioned so that its axial center substantially coincides with the upper end surface of the side plate 9. The movable frame 8 has a mounting pipe 19 fixed by a bracket 18 extending forward from the horizontal bar 13, and the movable frame 8 can be pivotally connected to the fixed frame 7 by connecting the mounting vip 19 to the fixed shaft 17. Achieved by fitting.

  A double-acting hydraulic cylinder 20 is connected between the fixed frame 7 and the other end of the movable frame 8 for swinging the movable frame 8 with respect to the fixed frame 7 about the fixed shaft 17. Specifically, the fixed frame 7 has a short pipe 21 that is fixed to the side plate 9 and protrudes laterally, and an arm 22 is fixed to the short pipe 21. On the other hand, the movable frame 8 has a support pipe 23 that passes through an end of the side plate 12 opposite to the mounting pipe 19 and is fixed to the end. The support pipe 23 protrudes laterally from the side plate 12. An arm 24 is fixed to the portion. One end of the double-acting hydraulic cylinder 20 is rotatably connected to the arm 22 of the fixed frame 7 by a pivot pin 25, and the plunger rod 26 of the hydraulic cylinder 20 has a distal end of the plunger rod 26 of the movable cylinder 8 by a pivot pin 27. It is connected to the pivotable. Reference numeral 28 is a piece fixed to the side surfaces of the arms 22 and 24 to prevent the pivot pins 25 and 27 from coming off. Reference numeral 29 is a stopper having a stopper surface 30 for stopping the further swinging of the front horizontal bar 13 of the movable frame 8 when the movable frame 8 swings upward about the fixed axis. And fixed to the inner surfaces of the side plates 9 and 9 of the fixed frame 7.

  According to the present invention, in the crawler type forest work machine 1 in which the stabilizer device 6 is fixedly attached to the lower vehicle body 5 with a crawler and the swing bearing 14 of the platform 4 by the above-described method, As shown in FIGS. 1, 3 and 4, an attachment 31 according to the type of work in the forest, for example, a gripping device with a cutter, an excavator device with a carter, or the like is attached.

  FIG. 1 shows a crawler type forest working machine 1 located on a flat surface. In this case, a double hydraulic cylinder 20 hydraulically locks a retracted plunger rod in that state. Thus, the platform 4 is in a state of being parallel to the lower vehicle body 5 with the bottom plate 16 of the movable frame 8 in contact with the upper end surface of the side plate 9 of the fixed frame 7. 3 and 4 show a state where the crawler type forest working machines are located on the uphill slope and downhill slope, respectively.

  As can be seen from FIG. 3, on the up slope, the plunger rod 26 is extended by the operation of the hydraulic cylinder 20 in a state where the platform 4 is positioned so that the cabin 2 is directed upward. Then, the platform 4 swings upward about the fixed shaft 17 with respect to the lower vehicle body 5 with a crawler until it takes a substantially horizontal position. When the front horizontal bar 13 of the movable frame 8 comes into contact with the stopper surface 30 of the stopper 29 of the fixed frame 7, the further swinging of the platform is stopped. The thinning operation is performed by the attachment 31 attached to the boom 3, as is generally known, by grasping a standing tree by its hydraulic operation and cutting the standing tree with a cutter (not shown). In the thinning operation on the down slope, as shown in FIG. 4, the platform 4 is turned with respect to the lower vehicle body 5 with a crawler so that the cabin 2 goes downward. It is clear that the platform leveling is done in the same way as described above. In any case, the worker in the cabin can surely visually confirm that the attachment attached to the boom grabs the standing tree at an appropriate position and cuts the standing tree with the cutter. Thus, if the platform is leveled when encountering a sloping ground, the crawler-type forestry work machine is kept in a stable state that does not fall down, so that various operations can be performed with peace of mind. In order to return the platform 4 to the state parallel to the lower car body 5 with crawler, the plunger rod 26 is retracted by the reverse operation of the front of the hydraulic cylinder 20. Then, the movable frame 7 swings downward with respect to the fixed frame 7 about the fixed shaft 17 until the bottom plate 16 of the movable frame 8 of the stabilizer device 6 contacts the upper end surface of the side plate 9 of the fixed frame 7.

DESCRIPTION OF SYMBOLS 1 Crawler type forest work machine 2 Cabin 3 Boom 4 Platform 5 Crawler lower body 6 Stabilizer device 7 Fixed frame 8 Movable frame 14 Rotating bearing 17 Fixed shaft 20 Double acting hydraulic cylinder 26 Plunger rod 31 Attachment

Claims (2)

  In a crawler type forest work machine in which a platform including a cabin and a boom is mounted so as to be rotatable with respect to a lower car body with a crawler, a stabilizer device is interposed between the platform and the lower main body with a crawler, and the stabilizer device is A fixed frame attached to the vehicle body, and a movable frame attached to a pivot bearing of the platform, wherein the movable frame has one end rotatably connected to the fixed frame by a fixed shaft, and the other end of the fixed frame and the movable frame A crawler-type forest work machine in which a double-acting hydraulic cylinder for oscillating the movable frame with respect to the fixed frame about the fixed shaft is connected between the two.   A stabilizer device interposed between a platform of a crawler type forestry work machine and a lower main body with a crawler, comprising a fixed frame to be attached to a lower vehicle body, and a movable frame to be attached to a swivel bearing of the platform, The movable frame has one end rotatably connected to the fixed frame by a fixed shaft, and is connected between the fixed frame and the other end of the movable frame, and the movable frame is swung with respect to the fixed frame about the fixed shaft. A stabilizer device for a forest work machine with a crawler, including a double-acting hydraulic cylinder for moving.

Images