JP4092567B2 - Mid-mount foliage harvester - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mid-mount foliage harvester for harvesting the foliage of crops planted in a field.
[0002]
[Prior art]
The mower apparatus described in patent document 1 is illustrated as a conventional foliage cutter. As shown in FIG. 6, this device 71 is mounted on the link 72 through a three-point link hitch mechanism that moves up and down by a hydraulic mechanism at the rear part of the tractor so as to be movable up and down. The upper part of the mower 81 fitted with the cutting blade 80 is covered with a shield cover 82, and a rear cover 85 is pivotally attached to the rear end portion of the shield cover 82 so as to be rotatable up and down. A gauge ring 86 is provided at the rear end portion of the rear cover 85, and the vertical swing of the rear cover 85 is detected and transmitted to the hydraulic mechanism between the upper surface of the rear cover 85 and the hydraulic mechanism of the three-point link hitch mechanism. A sensor mechanism 73 is provided that automatically adjusts the cutting height of the mower device 71 by moving the mower device 71 up and down in conjunction with the vertical swing of 85.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2000-253725
[Problems to be solved by the invention]
However, if the running path of the gauge wheel 86 in the field is locally uneven or if it is a soft field, the height of the gauge wheel 86 is temporarily changed, and this is detected by the sensor mechanism 73 and the mower device 71. Since the cutting height is temporarily changed, there is a problem that the cutting height is not constant. In particular, when cutting the foliage on the upper surface of the pod formed in the field, if the cutting height becomes too low, the mower device 71 breaks down the pod and exposes and damages underground crops (for example, potatoes, etc.). If the height is too high, there is a problem that the remaining stem becomes longer.
[0005]
An object of the present invention is to solve the above-mentioned problems, and to provide a mid-mount stalk-and-leaves harvester that can stabilize the cutting height because the cutting height is hardly affected by the state of the field.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a mid-mount foliage cutter according to the present invention includes a machine body supported by front and rear wheels, and a harvester that is disposed between the front and rear wheels to reap the foliage of crops planted in a field. A mid-mount type foliage mower having a device and a support portion for supporting the mowing device on the machine body, and including a rolling preventing portion for preventing the mowing device from tilting left and right with respect to the machine body The support portion is configured to support the machine body with substantially the entire weight of the reaping device so that the reaping device floats from the field during the reaping operation . A suspension support portion is provided that suspends and supports the front side of the reaping device on the airframe. The suspension support portion is pivotally supported by the reaping device so as to be vertically rotatable, and the adjustment arm. The tip A connecting member connecting the body, and a regulating means for adjusting the rotation angle of the adjusting arm.
[0007]
According to this configuration, by arranging the reaping device between the front and rear wheels, the height change of the reaping device is smaller than that even if the height of the front wheel or the rear wheel with respect to the upper surface of the field temporarily changes. I'll do it. For example, if the reaping device is arranged in the approximate center of the front and rear wheels, the height change of the reaping device can be ½ of the height change of the front wheel or the rear wheel. Further, the longer the distance between the front and rear wheels, the smaller the inclination of the reaping device when the relative height of the front and rear wheels is changed, and the stability of the reaping operation is improved. And since it is comprised so that the height and inclination of the said cutting device with respect to the said body may always be kept constant by the said support part and the said rolling prevention part, cutting height can be stabilized.
[0009]
Moreover, according to this structure, the weight of the said cutting device and the downward load at the time of a cutting work can be borne by the said suspension support part .
[0011]
Further , according to this configuration, when the rotation angle of the adjusting arm is adjusted by the adjusting means, the distance between the cutting device side end of the connecting member connected to the body and the cutting device, that is, the distance to the body. The height of the mowing device can be adjusted.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
1 to 5 show a mid-mount foliage harvester 1 according to an embodiment of the present invention. This foliage harvester 1 is a riding type, and as shown in FIGS. 1 to 3, it is arranged between the machine body 4 supported by the front and rear wheels 2 and 3 and the front and rear wheels 2 and 3. The harvesting device 5 that harvests the foliage of the crop planted in the cocoon U of H, the support unit 6 that supports the harvesting device 5 so as to be able to move up and down on the body 4, and the harvesting device 5 so that it does not tilt to the left and right And a rolling prevention unit 7.
[0013]
The fuselage 4 has a structure in which rigidity is ensured across the center and is supported by one front wheel 2 and two rear wheels 3. The front wheel 2 and the rear wheel 3 are respectively disposed at the front end portion and the rear end portion of the airframe 4 so as to ensure the distance between the front wheel 2 and the rear wheel 3 as long as possible. A driver's seat 11 is provided at the rear of the body 4. Below the driver's seat 11, an engine (not shown) is installed as a prime mover that drives the wheels 2 and 3.
[0014]
The reaping device 5 includes a device frame 15 extending in the left-right direction. A rotating shaft 16 extending horizontally from side to side is rotatably supported on the lower side of the apparatus frame 15. A large number of flail blades 17 are attached to the circumference of the rotary shaft 16. An engine 18 as a prime mover is installed on the upper side of the apparatus frame 15, and the rotary shaft 16 is driven to rotate via a power transmission mechanism 19. Further, the apparatus frame 15 is provided with a support column 20 extending obliquely rearward and upward, and an operation unit 21 for operating the operation of the cutting device 5 is attached to the tip of the support column 20. Yes. And this cutting device 5 cuts up the foliage of the crop planted in the cocoon U by the up cut in the state lowered by the support part 6 so that the flail blade 17 comes to the upper surface vicinity of the cocoon U. Yes.
[0015]
The support unit 6 includes a parallel link mechanism 25 that connects and supports the rear side of the reaping device 5 to the body 4 so that the reaping device 5 can be moved up and down relative to the body 4, and the front side of the reaping device 5. And a suspension support portion 26 for suspension support. As shown in FIG. 4, the support unit 6 supports the body 4 to support substantially the entire weight of the reaping device 5 so that the reaping device 5 floats from the basket U of the field H during the reaping operation. It is configured.
[0016]
The parallel link mechanism 25 includes a pair of upper and lower link members 27 and is configured to support the reaping device 5 so as to be movable up and down while maintaining a fixed working posture with respect to the machine body 4. The parallel link mechanism 25 is driven up and down by a hydraulic cylinder 28 as a lift drive means.
[0017]
The suspension support portion 26 includes an adjustment arm 31 that is pivotally supported by the cutting device 5 so as to be pivotable up and down, a pair of connecting members 32 that connect the distal end side of the adjustment arm to the front side of the machine body 4, and the rotation of the adjustment arm 31. And an adjusting unit 33 for adjusting the moving angle.
[0018]
The adjustment arm 31 includes a pair of left and right arm pieces 35 pivotally supported by the device frame 15 of the reaping device 5 on the base end side, and a bar 36 that is connected to the distal ends of both arm pieces 35 and extends to the left and right. .
[0019]
The pair of connecting members 32 are connected to both sides of the front side of the machine body 4 and both ends of the bar 36, and in this example, are composed of a length adjusting fitting 38 and a chain 39. The length adjusting bracket 38 is configured to be adjustable in length by a screw structure. Each connecting member 32 extends from the front side of the machine body 4 toward the end of the bar 36 that is obliquely below and outside, and the mowing device 5 is lifted obliquely in both the vertical and horizontal directions via the bar 36. It has become. This prevents the right and left displacement of the reaping device 5 due to the difference between the left and right loads. In the connecting member 32, instead of the chain 39, a wire, a link, or the like can be appropriately employed.
[0020]
The adjustment portion 33 includes an adjustment rod 41 that connects between the tip of the support portion 6 projecting upward from the apparatus frame 15 and the bar 36 at the tip of the adjustment arm 31 and adjusts the distance therebetween. . In this example, the adjustment rod 41 can be adjusted in length by a screw structure, and an adjustment handle 42 for adjusting the screwing amount of the screw structure is provided in the operation portion 21. The adjustment handle 42 is provided immediately in front of the driver's seat 11 so that the operator can operate while sitting on the driver's seat 11. When the height of the adjustment arm 31 is adjusted by turning the adjustment handle 42, the distance between the cutting device side end of the connecting member 32 and the cutting device 5, that is, the height of the cutting device 5 with respect to the machine body 4 can be adjusted. It has a structure. In addition, as a structure for adjusting the length of the adjusting rod 41, an electric cylinder or a hydraulic cylinder can be appropriately employed instead of the screw structure.
[0021]
As shown in FIG. 5, the rolling prevention unit 7 includes a support arm 45 that is attached to the body 4 and can be adjusted in length. The support arm 45 extends to the rear of the support column 20 of the reaping device 5, and a pair of rollers 46, 46 that are rotatable about an axis extending substantially in the front-rear direction are spaced from each other at the tip. Is provided. Both rollers 46 are provided so as to sandwich both sides of a sandwiched portion 47 attached to the rear side of the column 20. The rolling prevention unit 7 allows the rollers 46, 46 to roll up and down substantially along the sandwiched portion 47, thereby allowing the mowing device 5 to move up and down relative to the machine body 4, and the rollers 46, 46 to be covered. By sandwiching the sandwiching portion 47, it is possible to prevent the cutting device 5 from tilting in the left-right direction with respect to the machine body 4.
[0022]
According to the foliage cutter 1 of the present invention configured as described above, the height of the front wheel or the rear wheel with respect to the upper surface of the field H is temporarily changed by arranging the cutting device 5 between the front and rear wheels. However, the height change of the reaping device 5 can be less than that. In this example, since the cutting device 5 is arranged at the approximate center of the front and rear wheels, the height change of the cutting device 5 can be ½ of the height change of the front wheel or the rear wheel. Further, since the distance between the front wheel 2 and the rear wheel 3 is ensured as long as possible, the inclination of the reaping device 5 is small when the relative height of the front wheel 2 and the rear wheel 3 changes, and the reaping operation is stable. It is supposed to be. And since it is comprised by the support part 6 and the rolling prevention part 7 so that the height and inclination of the cutting device 5 with respect to the body 4 may always be kept constant, the cutting height can be stabilized.
[0023]
Further, the support unit 6 includes a parallel link mechanism 25 that connects and supports the rear side of the reaping device 5 to the body 4 so that the reaping device 5 can move up and down with respect to the body 4, and a front side of the reaping device 5 Since the suspension support portion 26 that is suspended and supported by the machine body 4 is provided, the suspension support portion 26 can bear the weight of the cutting device 5 and the downward load during the cutting operation, and the parallel link mechanism 25. Can be reduced. For this reason, the parallel link mechanism 25 and the hydraulic cylinder 28 with lower performance can be employed, and the cost can be reduced.
[0024]
In addition, this invention is not limited to the said embodiment, For example, it can also be suitably changed and embodied as follows, for example in the range which does not deviate from the meaning of invention.
(1) Change the arrangement part of the rolling prevention part 7 appropriately. For example, the clamped portion 47 is erected on the front side of the cutting device 5, and a pair of rollers 46 that clamp the clamped portion 47 are provided on the front side portion of the machine body 4.
(2) Provide the rolling prevention part 7 in two or more places. For example, in the said embodiment, arranging in two steps of upper and lower sides is mentioned. If it carries out like this, it will come to be able to prevent more reliably the inclination to the right and left of the cutting device 5 with respect to the body 4.
[0025]
【The invention's effect】
As described above in detail, according to the mid-mount foliage mower according to the present invention, the cutting height is hardly affected by the state of the field, and the cutting height can be stabilized.
[Brief description of the drawings]
FIG. 1 is a side view of a mid-mount foliage mower according to an embodiment of the present invention.
FIG. 2 is a plan view of the same stem and leaf mower.
FIG. 3 is a side view of the cutting device of the same stem and leaf cutter.
4 is a view taken along arrow IV in FIG. 3;
FIG. 5 is a cross-sectional view taken along line VV in FIG.
FIG. 6 is a side view showing a conventional foliage cutter.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Stem-and-leaf cutter 2 Front wheel 3 Rear wheel 4 Airframe 5 Cutting device 6 Support part 7 Rolling prevention part 25 Parallel link mechanism 26 Suspension support part 31 Adjustment arm 32 Connecting member 33 Adjustment part H Field U

Claims (1)

A midst comprising an airframe supported by front and rear wheels, a mowing device that is disposed between the front and rear wheels and harvests the foliage of a crop planted in a field, and a support portion that supports the mowing device to the airframe. Mount-type stem and leaf mower,
With a rolling preventing portion that prevents the reaping device from tilting left and right with respect to the aircraft,
The support portion is configured to support the aircraft body with substantially the entire weight of the reaping device so that the reaping device is in a state of floating from a field during the reaping operation .
The support part includes a suspension support part that suspends and supports the front side of the reaping device on the machine body,
The suspension support portion includes an adjustment arm pivotally supported by the reaping device so as to be pivotable up and down, a connecting member that connects the tip end portion of the adjustment arm to the machine body, and an adjustment that adjusts the rotation angle of the adjustment arm. A mid-mount foliage mower with means .

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