JP2009142236A - Reaping attachment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reaping attachment attached at the front end of a working arm of a hydraulic excavator and for reaping sugarcane or the like. <P>SOLUTION: The reaping attachment includes a grapple body capable of holding objects to be reaped by oppositely opening and closing a pair of grapple forks having a pair of right and left craw parts, and a reaping cutter device formed on one of the grapple forks and provided between the pair of right and left claw parts, wherein blades of the reaping cutter device projects on the outer surface side of the one of the grapple forks and between the pair of right and left craw part tip end parts. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cutting attachment that is attached to a tip of a working arm of a hydraulic excavator and cuts sugarcane or the like.

Conventionally, the sugarcane harvester that uses the agricultural tractor of Japanese Patent No. 2975356 as a harvester for cutting sugarcane, attaches divider attachments to the left and right sides of the front of the body frame of the agricultural tractor, and links the three points of the agricultural tractor A base cutter attachment is attached.
The divider attachment has a divider and a push-down roller that is positioned in the rear center of the divider and rotates forward, and the divider is supported by a parallel link support so as to be movable up and down, and is moved up and down by a lifting cylinder. I have to.
The base cutter attachment has a pair of left and right base cutters and a drawer roller that is located behind the base cutter and rotates forward, and the drawer roller is attached to the base cutter frame so as to be movable up and down by a lifting cylinder.
A hydraulic pump is provided in the frame of the base cutter attachment, and the hydraulic pump is driven by a PTO shaft (power take-off shaft) of an agricultural tractor via a universal joint, and a divider, a push-down roller, a base cutter, a drawing roller Are driven by a single hydraulic motor, and these hydraulic motors and both the lift cylinders are driven by the hydraulic pump.
Then, a push-down roller is provided on the front side to push the sugar cane forward, the sugar cane pushed down under the belly of the tractor is rooted by a base cutter, and the root can be pulled back while being pressed by the draw roller.
However, in the above configuration, the sugar cane is pressed by the push-down roller, and the base is cut by the base cutter located at the rear separation position. Therefore, it takes time from gripping to root cutting, and the base after cutting is also pressed by the drawing roller. Therefore, there is a possibility of damaging sugarcane, and the number of harvests is reduced, which is not efficient.
In addition, it was difficult to harvest sugarcane that had fallen in any direction due to a typhoon.
On the other hand, as an attachment having a gripping function, for example, a grapple that can open and close a pair of grapple forks as illustrated in Japanese Utility Model Laid-Open No. 4-134561 is known, but cutting cannot be performed.
Japanese Patent No. 2975356 Japanese Utility Model Publication No. 4-134561

  The present invention has been made in view of the above circumstances, and the main problem is that even if the harvested object such as sugar cane is self-supporting or falls sideways, it is grasped by a pair of grapple forks and is in a cutting posture. An object of the present invention is to provide a cutting attachment that can be cut with a cutting cutter.

In order to solve the above problem, the invention of claim 1
A cutting attachment attached to a work arm of a work machine,
A grapple main body capable of opening and closing a pair of grapple forks having a pair of left and right claw portions and gripping an object to be cut;
A cutting cutter device provided between a pair of left and right claws formed on the one grapple fork,
A cutting attachment, wherein a blade of the cutting cutter device protrudes between the pair of left and right claw tip ends on the outer surface side of the one grapple fork.
In the invention of claim 2,
The mowing cutter device has a mowing cutter provided with a blade operatively on one wall surface of the housing, and an operating device for rotating or reciprocating the mowing cutter in the housing,
The other wall surface of the housing that faces the one wall surface is a bottom wall surface that blocks a portion other than the tip portion between the claw portions of the grapple fork.
In the invention of claim 3,
The blade of the cutting cutter is arranged so as to be inclined in a direction of gradually separating toward the tip with respect to the outer surface of the tip of the claw portion to which the blade is attached.

Even if the object to be cut is tilted sideways, the present invention can be held and raised by a pair of grapple forks and supported in a cutting position, and in that position, it can be cut by a cutting cutter provided on the outer surface side of the grapple fork. it can.
Therefore, the cutting work can be surely performed regardless of the posture of the cut object.
In addition, when harvesting, the harvested object is not forcedly pressed and the harvested object is not damaged, so that the number of harvests can be increased.
Furthermore, it is a simple configuration that simply attaches a cutting cutter and an operating device to the grapple body, so there is no need to increase the size of the device, and the grapple body can also collect and load work to be cut. It functions as an attachment for applications and is highly economical.

According to the present invention, a cutting cutter device is provided between a pair of left and right claws of one grapple fork, and the object to be cut is supported in a cutting posture by the pair of grapple forks and is cut by the blade of the cutting cutter device.
Hereinafter, embodiments of the attachment for cutting according to the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of a working machine 40 provided with a cutting attachment 1.
The work machine 40 has an upper turning body 44 installed on a lower traveling body 42 via a turning device 43, and an operator cab 45, a power unit 46, and the like are mounted on the upper turning body 44, and a multi-joint structure work is provided. The hydraulic excavator configuration has an arm 47.

[Mowing attachment]
The cutting attachment 1 is attached to the tip of the working arm 47.
The mowing attachment 1 includes a bracket 2 attached to the tip of the working arm 47 so as to be rotatable by a hydraulic cylinder 48, a frame 4 attached to the bracket 2 via a turning device 3, and the frame 4 A grapple main body 1A having a pair of grapple forks 5 and 6 pivotally attached to each other, and a cutting cutter device 10 is provided between a pair of claw portions 5a and 5a 'of the one grapple fork 5.

[Grapple Fork]
As shown in FIGS. 2 and 5, the pair of grapple forks 5 and 6 are pivotally attached to the frame 4 so as to be openable and closable around pivot pins P1 and P2, respectively.
Each grapple fork 5 and 6 has a plurality of spaced apart claw portions 5a, 5a 'and 6a, 6a', respectively.

Each claw portion 5a, 5a 'and 6a, 6a' in the illustrated example has a claw shape with a bent tip, and the tip intersects when the pair of grapple forks 5 and 6 are closed, so that both do not overlap. They are staggered alternately.
In the present embodiment, one grapple fork 5 has a pair of claw portions 5a and 5a 'on both left and right ends, and no claw portion is provided between them.
The other grapple fork 6 has claw portions 6a and 6a ′ arranged so as to be displaced inward of the claw portions 5a and 5a ′ (see FIG. 5).

In this embodiment, the actuator for the pair of grapple forks 5 and 6 includes a known hydraulic cylinder 7 and an interlocking link 8.
That is, one end of the hydraulic cylinder 7 is connected to the frame 4 by the pin P3, and the other end is connected to the operating piece 5b of one grapple fork 5 by the pin P4.
Further, the operating pieces 5b, 6b formed integrally with the pair of grapple forks 5, 6 are connected by an interlocking link 8 pivotally attached by pins P5, P6 (see FIG. 2).

Thus, when the cylinder 7 is expanded and contracted, one grapple fork 5 pivots about the pivot pin P1 via the pin P4, and the other grapple fork 5 pivots about the other via the link 8. The grapple fork 6 also pivots with the pivot pin P2 as a fulcrum, whereby the pair of grapple forks 5 and 6 opens and closes and displaces between an open position and a gripping position.
In the present invention, the operation device of the pair of grapple forks 5 and 6 is not limited to the above-described configuration, and can be replaced with other known opening / closing operation configurations.

[Mowing cutter device]
As shown in FIGS. 3 and 4, the cutting cutter device 10 includes a substantially box-shaped housing 11, a cutting cutter 20 in which a blade 21 is provided outside the housing 11, and a mechanism portion is provided in the housing, as well as a housing. 11 and an operating device 30 that moves the blade 21 of the cutting cutter 20 in the rotational direction or the reciprocating direction.

[housing]
The housing 11 is fitted between a pair of left and right claw portions 5a and 5a 'formed on one grapple fork 5, and its tip is set shorter than the tip of the claw portions 5a and 5a'. A predetermined space is opened between the tips of the claw portions 5a and 5a 'so that a gap S is formed.

[Mowing cutter]
The cutting cutter 20 of this embodiment includes a blade 21 and a driven side belt wheel 26 showing an example of a rotation mechanism of the blade 21.
The driven belt wheel 26 is pivotally supported by the first support piece 12 in the housing 11, and the rotation shaft 27 penetrates the first support piece 12 and protrudes to the outside of the housing 11. As a result, the blade 21 provided outside the housing 11 is rotated.

An operating piece 23 is integrally provided on the rotary shaft 27.
The actuating piece 23 has a shape in which four connecting arms 24 are eccentrically shifted slightly from the center line and extend radially from the central portion at intervals of 90 degrees (see FIG. 6).
A plurality (three in the illustrated example) of fixing screw holes 25 are formed in the connecting arm 24 at equal intervals along the extending direction.

[blade]
In the case of the present embodiment, the blade 21 has a substantially rectangular shape, and the cutting edge is shorter than the tips of the pair of claw portions 5a, 5a ′ so as not to obstruct the gripping by the claw portions 5a, 5a ′. And it arrange | positions so that it may protrude in the said clearance gap part S, and is arrange | positioned at the outer surface side used as the non-gripping side of the said grapple fork 5. FIG.

Moreover, it is preferable that the cutting edge of the blade 21 is disposed so as to be gradually inclined toward the tip with respect to the substantially flat outer surface of the tip of the claw portions 5a and 5a ′ (see FIG. 4). .
In the present embodiment, the gap between the pair of claws 5a and 5a ′ is provided on one grapple fork 5 side, but may be provided on the opposite grapple fork 6.

The blade 21 is attached to each of the connecting arms 24 so as to be adjustable in length.
That is, the blade 21 is provided with a plurality (five in the illustrated example) of screw holes 22 for adjusting the length at equal intervals along the longitudinal direction.

  Therefore, the screw hole 25 of the connecting arm 24 and the screw hole 22 of the blade 21 are aligned and detachably fixed by a fixing tool (not shown) such as a screw or a bolt, so that the blade 21 can be moved by shifting the position of the aligned screw hole 22. The length can be adjusted.

[Actuator]
The actuating device 30 includes a hydraulic motor 31 and a driving side belt wheel 33 that rotates with the output shaft of the hydraulic motor 31 as a rotation shaft 32.
The hydraulic motor 31 is supported by the second support piece 13 in the housing 11, and the output shaft of the hydraulic motor 31 passes through the second support piece 13 while being supported by the second support piece 13. The car 33 is driven to rotate.

  Here, the driving side belt wheel 33 and the driven side belt wheel 26 are arranged in parallel so as to be on the same plane in the housing 11, and the driving side belt wheel 33 and the driven side belt wheel 26 are connected to each other. An endless belt 35 is stretched between them, and the rotational force of the hydraulic motor 31 is transmitted to obtain the rotational force of the blade 21.

The blade 21 of the cutting cutter 20 shown in FIG. 7 has a substantially sock shape in plan view, and is formed with a wide blade edge 21a side and a narrow base 21b side.
Since other configurations are the same as those of the above-described embodiment, the same components are denoted by the same reference numerals and description thereof is omitted.

  Further, the cutting cutter 20 shown in FIG. 8 has a central portion 21A, and four connecting pieces 21B that are eccentric from the center line and extend in the radial direction corresponding to the connecting arm 24 are formed at intervals of 90 degrees. The connecting piece 21B is formed with the same number of screw holes 22 corresponding to the screw holes 25 of the connecting arm 24. The blade 21 is integrally connected to the annular body 21C. The screw hole 22 is aligned with the screw hole 25 of the connecting arm 24 and fixed with a fixing tool (not shown) such as a screw or a bolt.

Since it consists of the said structure, in use, even if the to-be-cut object, such as sugarcane, falls down sideways, the to-be-cut object in the grapple forks 5 and 6 shown in FIG.
Then, as shown in FIG. 10 (a), the object to be cut, which is held in the cutting posture, can be cut by rotating the blade 21 of the cutting cutter 20.

Further, as shown in FIG. 10B, the napped material to be cut is cut by rotating the blade 21 of the cutting cutter 20 with the grapple forks 5 and 6 down while the grapple forks 5 and 6 are opened. Can do.
In addition, the grapples forks 5 and 6 can be swung in accordance with the posture of the cut object, grip the object to be cut in an arbitrary direction, and similarly, the blade 21 of the cutting cutter 20 can be rotated and cut. .
The harvested material after cutting can be gripped and collected by the grapple forks 5 and 6 and loaded onto the transport vehicle as it is using the work arm 47 of the work machine 40.

  In the present embodiment, the configuration in which the blade of the cutting cutter is rotated using the belt transmission device is exemplified, but other winding transmission devices may be used, and the rotation motor may be directly used without using the winding transmission device. The operation piece may be attached to the output shaft, and the blade may be attached to the operation piece.

Moreover, although the structure which rotates a braid | blade and cut | disconnects a cutting thing was illustrated, you may make it cut | disconnect a cutting thing by reciprocating a blade.
In that case, a device that performs reciprocal motion instead of rotation may be used as the operating device, or a power transmission device that converts rotational force into reciprocating motion may be used as a power transmission device on the cutting cutter side.

The power of the actuator is preferably hydraulically connected to the hydraulic system of the work implement, but an electric motor may be used.
Although sugarcane has been exemplified as the harvested material, other plants may be used.
In addition, it goes without saying that various design changes can be made without departing from the scope of the present invention.

It is a side view which shows the Example of the working machine provided with the attachment for cutting. It is a side view of the attachment for cutting of FIG. It is a top view of one grapple fork provided with the cutting cutter apparatus. FIG. It is the figure which looked at a pair of grapple fork from the bottom face of the other grapple fork. It is a top view which shows the braid | blade of FIG. It is a top view which shows the blade of a different shape. It is a top view which shows the braid | blade of another shape. It is a side view explaining the state which is going to hold | grip the to-be-cut thing to lay down. (A) is a side view explaining the cutting of the cut-off thing in a sideways state, (b) is a side view explaining the cutting of the cut-up thing in the napped state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Attachment for cutting 1A Grapple main body 2 Bracket 3 Rotating device 4 Frame 5, 6 Grapple fork 5a, 5a 'claw part 6a, 6a' claw part 7 Hydraulic cylinder 8 Link for interlocking 10 Cutting cutter apparatus 11 Housing 12 First support piece 13 Second support piece 20 Cutting cutter 21 Blade 22 Screw hole 27 Rotating shaft 23 Actuating piece 24 Connecting arm 25 Screw hole 26 Driven side belt wheel 27 Rotating shaft 30 Actuator 31 Hydraulic motor 32 Rotating shaft 33 Driving side belt wheel 13 Second support Piece 35 Endless belt 40 Working machine 42 Upper traveling body 43 Turning device 44 Upper turning body 45 Driver's cab 46 Power unit 47 Working arm 48 Hydraulic cylinder

Claims (3)

A cutting attachment attached to a work arm of a work machine,
A grapple main body capable of opening and closing a pair of grapple forks having a pair of left and right claw portions and gripping an object to be cut;
A cutting cutter device provided between a pair of left and right claws formed on the one grapple fork,
A cutting attachment, wherein a blade of the cutting cutter device protrudes between the pair of left and right claw tip ends on the outer surface side of the one grapple fork. The cutting cutter device has a cutting cutter in which a blade is operably provided on one wall surface of the housing, and an operating device for rotating or reciprocating the cutting cutter in the housing.
2. The cutting attachment according to claim 1, wherein the other wall surface of the housing facing the one wall surface is a bottom wall surface that blocks a portion excluding the tip portion between the claws of the grapple fork.   3. The blade according to claim 1, wherein the blade of the cutting cutter device is disposed so as to be inclined in a direction of gradually separating toward the tip with respect to the outer surface of the tip of the claw portion to which the blade is attached. Attachment for mowing.

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