JPH0456568B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a digging machine for long root vegetables such as Japanese yam.

(Prior Art) As a prior art related to this type of excavator, for example, the one described in Japanese Patent Application No. 1983-40177 is known.

This conventional excavator consists of a machine frame that is towed by a tractor, an arm that is placed under the machine frame and whose lower part penetrates deep into the soil, and a digger that is attached to the lower part of the arm to dig up yam, etc. It was equipped with a collecting plow. The above-mentioned arm is formed into an L-shape so that its lower part protrudes forward in the direction of travel, and a flat excavation plow is attached to the upper surface of the lower horizontal part of the L-shaped arm in an upwardly inclined manner. It was getting worse. And the vertical part of the L-shaped arm is
It was located directly behind the rear end of the digging plow at a predetermined distance.

For example, to dig up Japanese yam using this digging machine,
The plow is infiltrated into the soil and pulled by a tractor so that it passes under the yam. The Japanese yam in the soil is then dug up by a digging plow and protrudes to the surface. At this time, a worker was accompanying behind the tractor and was harvesting the yam by pulling it out by hand.

(Problems to be Solved by the Invention) In the above-mentioned conventional digging machine, the vertical part of the arm runs directly behind the digging plow, so if the dug up crops are left as they are without being pulled out, the The crops collided with the arm, potentially causing damage to the crops.

Therefore, in the conventional excavator, an accompanying worker is always required in addition to the tractor driver, and at least two workers are required for the excavation work.

As the number of agricultural workers decreased, reducing the number of workers was an urgent issue.

In addition, the accompanying worker has to pull out the crop in a short period of time before colliding with the rear arm of the dug-up crop, which is extremely difficult, dangerous, and labor-intensive work. It was hot.

Incidentally, there are known plows that are provided with an arm on one side of the plow to prevent crops from colliding with the arm, such as those described in Japanese Utility Model Application Publication No. 57-43713 and Japanese Utility Model Application Publication No. 57-102934. However, these conventional plows have an arm fixed to one side of the digging plow, so they can be used in fields with low traction resistance, such as sandy soil, but they cannot be used in fields with low traction resistance, such as sandy soil, but they cannot be used in fields with clay or very deep soil. It was not strong enough to be used for excavation work.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an excavator which has excellent strength and can be excavated by one worker.

(Means for Solving the Problems) A machine frame 4 that is towed and attached to a vehicle 1 such as a tractor to achieve the above purpose, an arm 5 that is provided in a downward shape from the machine frame 4 and that penetrates into the soil; 5, and a digging plow 7 provided at the lower part of the arms 5, 5 to dig up the long root vegetable crop 6, wherein the arms 5, 5 have a midway part in the vertical direction on the rear side. A pair of arms 5, 5 are provided on the left and right with an interval that allows the crop 6 to pass between them. The pair of arms 5 is provided so as to be inclined rearwardly upward from the lower end along its curved shape, and its rear end portion protrudes rearward from the pair of arms 5, 5. A reinforcing plate 2 that connects the upper and lower ends of , 5 vertically.
6, 26 are provided, and blade portions 26a, 26a are provided on the front edge side of each of the reinforcing plates 26, 26.

(Function) When digging up long root vegetables, the plow of the excavator is infiltrated into the soil so that it passes below the crops in the soil, and the excavator is moved by a tractor, etc. Towed by a vehicle. The plow then moves through the soil, and since it is tilted upward, the soil between the left and right arms is pushed upward along with the crops, thereby digging up the crops. In this case, the arms are on either side of the plow so that the crop passes backwards between the arms without touching each other.

If there is a reinforcing plate with a blade in front of the arm, the arm and digging plow can be reinforced, and since the blade cuts the soil before the arm, the soil and crops can be separated during digging. It can be cut into blocks and lifted.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

In Figs. 1 to 3, 1 indicates a tractor and 2 indicates an excavator. The excavator 2 is pivotally mounted to the rear of the tractor 1 via a three-point linkage mechanism 3 so as to be able to move up and down.

The digging machine 2 includes a machine frame 4, an arm 5 that is provided in a downward manner from the machine frame 4 and penetrates into the soil, and an excavator that is provided at the lower part of the arm 5 and digs up long root vegetables 6. It is equipped with a plow 7.

The machine frame 4 has a front frame 8 and a rear frame 9 that are horizontally installed in the left-right direction, and a pair of left and right side frames 10 and 10 that are connected to the left and right ends of these frames 8 and 9 in the front and rear directions.

A top mast 13 that projects upward is erected approximately at the center of the front frame 8, and a top mast 14 of the three-point linkage mechanism 3 is detachably pivoted to the upper end of the top mast 13.

Lower link mounting brackets 15, 15 are provided on both left and right sides of the front frame 8 and project downwardly.
Lower links 16, 16 of the three-point link mechanism 3 are removably pivoted to the front ends of the brackets 15, 15.

In addition, 17 is a stand attachment part, and 18 is a stand.

The arm 5 is rotatably and fixedly supported approximately at the center of the rear frame 9. That is, a rotating tube 19 is rotatably fitted into the rear frame 9, and a pair of left and right mounting plates 20, 20 extend rearward from both left and right ends of the rotating tube 19. A pair of left and right arms 5 are provided at the rear ends of the mounting plates 20, 20, respectively.
5 is fixed with bolts. This arm 5,5
is curved in a C-shape in side view with the center of curvature at the front so that the middle part in the vertical direction is on the rear side. The distance between the left and right pair of arms 5, 5 is
The distance is sufficient for the crops 6 to pass through.

The upper ends of the arms 5, 5 are connected by a connecting plate 21, on which a cylinder mounting bracket 22 is protruded. On the other hand, a cylinder mounting bracket 23 is also fixed to the rear side of the upper end of the top mast 13, and both brackets 22, 2
A hydraulic cylinder 24 is pivotally mounted between 3 and 3. This hydraulic cylinder 24 is composed of a double-acting cylinder, and is supplied with hydraulic oil from the hydraulic system of the tractor 1. As the hydraulic cylinder 24 expands and contracts, the arm 5 is rotated and fixed around the axis of the rear frame 9.

The hydraulic cylinder 24 is used to finely adjust the depth of the digging plow 7 into the soil.

The digging plow 7 is attached to the lower part of the arm 5. This excavation plow 7 is made of a flat plate, and is sloped upward from the lower end of the arms 5, 5 along the curved shape thereof, and its both side edges are fixed to the inner surfaces of the pair of left and right arms 5, 5 by welding or the like. has been done. The tip of this excavation plow 7 forms a coulter blade 25. The rear part of the digging plow 7 projects rearward from the arm 5. In front of each arm 5, 5,
Reinforcing plates 26, 26 are provided to vertically connect the upper and lower ends of the arms 5, 5, and blade portions 26a, 26a are formed on the front edge sides of each of the reinforcing plates 26, 26, respectively. In addition, each reinforcing plate 26, 26
are provided so as to completely or partially overlap the arms 5, 5 in the front and rear.

5 to 7 show mounting structures for the arm 5 and the digging plow 7, and any of these may be adopted. In the fifth example, both side edges of the digging plow 7 are welded to the upper edge of the arm 5. 6th and 7th
In the figure, the digging plow 7 is formed in an arc shape.

When digging up long root vegetables in the soil with the excavator configured as described above, the plow 7 is used as shown in Figure 1.
The excavator is infiltrated deep into the soil so that it passes below the crops 6, and the excavator is pulled by the tractor 1.
Then, as the plow 7 moves upward after penetrating into the soil, the soil on the plow 1 is pushed upward together with the crops 6. On the other hand, since there are arms 5, 5 having blade parts 5a, 5a on both sides of the plow 137, earth cutting is carried out with the blade parts 5a, 5a, so that the traction resistance of the tractor 1 is reduced, and moreover, the plow The cut soil above 7 is lifted up in blocks. Further, since the arms 5, 5 are located on both sides of the plow 7, the crops 6 pass backward between the arms 5, 5, so that the crops 6 will not collide with the arms 5, 5 and be damaged. In particular, since the rear end of the plow 7 protrudes further rearward than the arms 5, 5, at the highest lifting position at the rear end of the plow 7, the lifted soil is not affected by the arms 5, 5. Even if the crops 6 tend to collapse from side to side, and the crops 6 fall down at that time, the crops 6 will not be damaged by the arms 5, 5.

Furthermore, since the plow 7 is supported by the arms 5, 5 on both sides, it has superior strength compared to the conventional plow provided on one side. Moreover, since the plow 7 is supported on both sides by the pair of left and right arms 5, 5, the resistance of the soil is uniform on both sides, and there is no possibility that the arms 5, 5 or the plow 7 will tilt.

In this way, there is no risk that the dug-up crop 6 will collide with the arms 5, 5, so the driver of the tractor 1 can perform the extraction work after the digging work is completed. Therefore, the excavation work is a one-man job.

The digging plow 7 is installed between the lower portions of the pair of arms 5, 5 which are curved in a C-shape, rising upward from the lower ends of the arms 5, 5 along the curved shape. The trenching part for the arms 5, 5 of 7 is longer, and the excavation plow 7 is connected to the arms 5, 5.
5 can be firmly attached. reinforcing plate 26,
Since the arm 26 has the effect of reinforcing the arms 5, 5 and the plow 7, the arms 5, 5 can be made thinner and lighter, and the traction resistance of the tractor 1 can be reduced accordingly. In addition, since the reinforcing plates 26, 26 can be straightened, the blade parts 26a, 26 can be attached to the arcuate arms 5, 5.
6a, the blade portions 26a, 2
6a is easy to process. Furthermore, when digging, the blades 26a, 26a of the reinforcing plates 26, 26 cut the soil before the plow 7 lifts the soil, and then the plow 7 lifts the soil, so there is little resistance. The cut soil can be lifted up in blocks, and work can be carried out quickly even in hard or clay fields.

(Effects of the Invention) According to the present invention, since the digging plow is held in a pinched manner by the pair of left and right arms, the crops dug up by the digging plow do not collide with the arms backwards. , passes between both arms.

Therefore, there is no need for a worker to follow behind the tractor and quickly pull out the crops, as is the case in the past, and the number of workers can be reduced.

In addition, since the digging plow is clamped and fixed to a pair of left and right arms, it has high strength and rigidity, and is suitable for working in clay fields or deep locations. Furthermore, since the traction resistance acts evenly on the left and right arms, there is no twisting force on the machine frame, etc.
Stable traction is possible. In addition, the arm is curved in a C-shape when viewed from the side, and the digging plow is installed between the lower portions of the pair of arms so as to be inclined backward along the curved shape of the arm. The attachment part to the arm is longer, allowing the digging plow to be firmly attached.

In addition, since the plow is sloped upward at the rear and the rear end protrudes further back than the arm, the soil lifted at the rear end of the plow is not affected by the arm and easily collapses. Damage to crops at that time can also be prevented.

Furthermore, since a reinforcing plate is provided that vertically connects the upper and lower ends of the arm, the arm and the plow are effectively reinforced, and the weight of the arm can be reduced by using a thin plate material.

Furthermore, since the reinforcing plate has a cutting edge, this blade cuts the soil in advance, allowing the plow to lift the soil better.

[Brief explanation of the drawing]

FIG. 1 is a side view of an excavator showing an embodiment of the present invention, FIG. 2 is a front view of the same, FIG. 3 is a plan view of the same, and FIG.
The figures are cross-sectional views taken along line A-A in Figure 1, and Figures 5 to 7.
The figures are various cross-sectional views corresponding to the line BB in FIG. 1. 1... Tractor, 2... Excavator, 4... Machine frame,
5...arm, 6...crop, 7...digging plow,
26... Reinforcement plate, 26a... Blade portion.

Claims (1)

[Claims] 1. Machine frame 4 that is towed and mounted on a vehicle 1 such as a truck
Arms 5, 5 are provided in a downward manner from the machine frame 4 and penetrate into the soil, and a digging plow 7 is provided below the arms 5, 5 to dig up long root vegetables 6. In the excavator, the arms 5, 5 are curved in a C-shape when viewed from the side so that the middle part in the vertical direction is on the rear side, and a pair of arms 5, 5 are provided on the left and right with an interval that allows the crop 6 to pass between them. between the lower ends of the pair of arms 5, 5, the rear end slopes upward from the lower end of the pair of arms 5, 5 along its curved shape, and the rear end extends rearward from the pair of arms 5, 5. A reinforcing plate 2 that is provided in a protruding manner and vertically connects the upper and lower ends of the pair of arms 5, 5 in front of the pair of arms 5, 5.
6, 26, and blade portions 26a, 26a are provided on the front edge side of each reinforcing plate 26, 26.