JPS6320970B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rice field leveling machine for a tractor used in agricultural work and the like.

[Conventional technology]

Conventionally, as a transportation device similar to this type of rice field leveling machine, Japanese Patent Publication No. 33-2559 and Utility Model Publication No. 49-68205 have been published.
No. 48-4501 is known.

In this conventional structure, a mounting frame is connected to the rear part of the tractor in the direction of travel so that it can move up and down by a three-point linkage mechanism, and a soil transport platform is pivoted to the mounting frame so that it can tilt backwards, and the soil transport platform and the mounting frame are A releasable locking mechanism is provided between the frame and the frame.

[Problem that the invention seeks to solve]

However, in the conventional structure described above, soil is introduced into the carrier by scooping it up at the rear edge of the carrier by hand or by moving the tractor backwards, and the rice field soil is not necessarily introduced into the rice field. In addition, in the case of the conventional structure, as shown in Fig. 7, the pivot position c between the mounting frame a and the soil transport platform b, that is, the backward tilting fulcrum position of the soil transport platform b, is not suitable for soil leveling work. In the case of one installed at the front end of soil transport platform b, the tilting angle θ of soil transport platform b tends to be insufficient,
Furthermore, in the case where the pivot position c is provided on both the left and right sides of the soil transport platform b as shown in FIG. This has disadvantages in that the pin d is easily damaged, making it unstable to hold the soil transport platform to the mounting frame, and making it difficult to tilt and rotate the soil transport platform.

[Means for solving problems]

The purpose of the present invention is to solve these inconveniences.The gist of the present invention is to connect a mounting frame to the rear of the tractor in the direction of travel so that it can move up and down by a three-point link connection mechanism, and to attach an earth transport platform to the mounting frame. is pivotally mounted so that it can be tilted backwards, and a releasable locking mechanism is provided between the soil transport platform and the mounting frame, wherein the mounting frame has an L-shaped side surface with left and right vertical bars and left and right horizontal bars. The rear end of the lower link of the three-point link connection mechanism is pivotally connected to the middle part of the left and right vertical bars, and the front part of the soil transport platform is provided so that it can be held in contact with the left and right vertical bars. At the same time, place the bottom front side of the soil transport platform on the left and right horizontal bars, and set the rear ends of the left and right horizontal bars as the bottom of the soil carrier at a fulcrum located between the front end of the bottom and the rear end of the bottom. A rice field leveling machine for a tractor is pivotally mounted, a plow is provided in the mounting frame in a downwardly forward manner, and a soil introduction port is provided at a position opposite to the rear of the plow of the soil transport platform.

[Effect]

The front part of the soil transport platform is held in contact with the left and right vertical rods with L-shaped sides, and the front bottom of the soil transport platform is placed and held on the left and right horizontal rods, and as the tractor moves forward, the soil inlet is opened by the plow in the mounting frame. The rice field soil is scraped and introduced into the soil transport platform through the soil transport platform, and at this time, the lower link of the three-point link connection mechanism is located almost horizontally, and the soil transport platform is placed at the bottom of the soil transport platform, and the front end of the bottom and the bottom It tilts backward using the pivot point between the fulcrum located between the rear ends and the rear ends of the left and right side rods as a fulcrum.

〔Example〕

1 to 6 show embodiments of the present invention, 1
1 is a tractor, and a mounting frame 3 is connected to the rear part of a tractor 1 by a three-point link connection mechanism 2 so as to be movable up and down.

The three-point link connection mechanism 2 includes a left and right lower link 16, an upper link 18, a lift arm 19, and a lifting link 20.

In addition, the mounting frame 3 has left and right vertical bars 6 and left and right horizontal bars 7 arranged in an L-shape on the side, and an upper horizontal bar 1 between the upper parts of the left and right vertical bars 6.
7, and a lower horizontal beam 27 is installed between the lower parts of the left and right vertical bars 6.

The tip of the upper link 18 of the three-point link connection mechanism 2 is pivotally connected to the upper horizontal beam 17 of this mounting frame 3, and the lower link 16 of the three-point link connection mechanism 2 is pivotally connected to the middle part of the left and right vertical rods 6. The mounting frame 3 is coupled to be movable up and down by the swinging of the lift arm 19.

4 is a soil transport platform, and the soil transport platform 4 is connected to the front wall 1.
3. The bottom wall 14 and the left and right side plates 15 form a container shape with an open top, and the front wall 13 has a soil inlet 12 in the center, and a frame 2 is provided on the outer bottom surface of the bottom wall 14.
1, and a fulcrum part 8 is provided at the bottom of the soil transport platform 4 between the front end of the bottom and the rear end of the bottom. The bottom front side of the soil transport platform 4 is placed on the soil transport platform 7 , and the rear ends of the left and right horizontal rods 7 are pivotally connected to the fulcrum portion 8 by a fulcrum shaft 22 .

Reference numeral 10 denotes a locking mechanism, which has a hook 31 on the upper horizontal bar 17 of the mounting frame 3 that is pulled down by a spring 30, and locks the front wall 1 of the soil transport platform 4.
An engaging rod 32 is provided on the upper reinforcing horizontal beam 29 of No. 3, and a hook piece 31 is provided so as to be able to be engaged with the engaging rod 32, and the hook piece 31 is provided so as to be detachable from and released from the engaging rod 32.

5 is a plow, and plow 5 has side pieces 2 on both left and right edges.
3, a mounting plate 24 is provided on the lower front side of the left and right horizontal bars 7 of the mounting frame 3, a plurality of pivot holes 25 are formed in the mounting plate 24, and mounting shafts 26 are provided protruding from both sides of the gap 5. , the mounting shaft 26 is inserted into the pivot hole 25, the back side of the plow 5 is brought into contact with the lower horizontal beam 27, and the plow 5 is provided in the mounting frame 3 in a downward-sloping manner.

11 is a rear wheel.

Since this embodiment has the above-mentioned configuration, when the tractor 1 moves forward with the soil transport platform 4 in the lowered state as shown in FIG. The soil 9 is fed into the platform 4, and the soil 9 can be loaded onto the soil carrier 4, as shown in FIG.
When the soil 9 is transported to a low place in the rice field by the tractor 1 at the raised position of , and the locking mechanism 10 is released by the worker, the soil transport platform 4 moves from the center of gravity W position of the empty soil transport platform 4 in FIG. When the soil transport platform 4 is loaded with soil as shown in FIG. 4, the center of gravity moves to the position W, causing the soil transport platform 4 to tilt backward, and the soil is discharged from the soil transportation platform 4.

In this case, since the mounting frame 3 pivots the rear end of the lower link 16 of the three-point link connection mechanism 2 to the middle part of the left and right vertical bars 6, the lower link 16 is positioned in a substantially horizontal state as shown in FIG. Therefore, it is possible to suppress the lifting of the mounting frame 3 and the soil transport platform 4 due to the upward force generated when removing soil from the rice field with the plow 5, and to suppress unexpected loads on the three-point link connection mechanism. The mounting frame 3 can be mounted on the left and right vertical bars 6.
The left and right horizontal rods 7 form an L-shaped side surface, and the left and right vertical rods 6 can hold the front part of the soil transport platform 4, and the bottom front side of the soil transport platform 4 can be placed and held. The soil transport platform 4 can be held in a state where it is hugged, and the soil transport platform 4 can be held in a stable state.
A large amount of soil can be loaded onto the soil transport platform 4, and the soil transport platform 4 can be moved up and down smoothly. Since the rear ends of the left and right horizontal bars 7 of the mounting frame 3 are pivotally connected, the tilting angle θ of the soil transport platform 4 can be increased as shown in FIG. Since the fulcrum part 8 is located near the center of gravity W including the transport platform 4 and the soil 9, the tilting and rising operations of the soil transport platform 4 can be performed smoothly and easily, and the load on the locking mechanism 10 can be suppressed. , a more stable holding state can be obtained, and rice field leveling work can be performed efficiently.

〔Effect of the invention〕

As described above, in the present invention, the rear end of the lower link of the three-point link connection mechanism is pivotally connected to the middle part of the left and right vertical rods of the mounting frame, so the lower link is located in a substantially horizontal position, and therefore the clearance is It is possible to suppress lifting of the mounting frame and soil transport platform due to the upward component force that occurs when removing soil from a rice field, and it is also possible to suppress unexpected loads on the three-point link connection mechanism, allowing stable running.
In addition, the mounting frame has an L-shaped side surface with left and right vertical bars and left and right horizontal bars, and the left and right vertical bars can hold the front part of the soil transport platform and also allow the bottom front side of the soil transport platform to be placed and held. The soil transport platform can be held in a hugging state, the soil transport platform can be held in a stable state, a large amount of soil can be loaded onto the soil transport platform, and the soil transport platform can move up and down smoothly. Since the rear ends of the left and right horizontal bars of the mounting frame are pivoted to the fulcrum located at the bottom of the transport platform between the front end of the bottom and the rear end of the bottom, the tilting angle of the soil transport platform can be increased. Therefore, the soil can be discharged well, and since the fulcrum is located near the center of gravity of the soil transport platform and the soil, the tilting and standing movements of the soil transport platform can be performed smoothly and easily, and the locking mechanism The load can be suppressed, a more stable holding state can be obtained, and rice field leveling work can be carried out efficiently.

As described above, the intended purpose can be fully achieved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is an overall side view, FIG. 2 is a partial perspective view, FIG. 3 is an explanatory side view, FIG. 4 is an explanatory side view, and FIG. The figure is a partial plan view thereof, FIG. 6 is an explanatory diagram thereof, FIG. 7 is an explanatory diagram of a conventional structure, and FIG. 8 is an explanatory diagram of a conventional structure. 1...Tractor, 2...3-point link connection mechanism,
3... Mounting frame, 4... Soil transport platform, 5... Plow, 6
... Left and right vertical bars, 7... Left and right horizontal bars, 8... Fulcrum part,
10...Lock mechanism, 12...Soil introduction port, 16...
Bottom link.

Claims (1)

[Claims] 1. A mounting frame is connected to the rear of the tractor in the direction of travel so as to be movable up and down by a three-point linkage mechanism, an earth transporting platform is pivotally connected to the mounting frame so as to be tiltable backwards, and the soil transporting stage and the mounting frame are In the case where a releasable locking mechanism is provided in between, the mounting frame is formed into an L-shaped side surface with left and right vertical bars and left and right horizontal bars, and the three-point link connection mechanism is installed in the middle of the left and right vertical bars. The rear end of the lower link is pivotally connected, and the front part of the soil transport platform is provided in such a way that it can be held in contact with the left and right vertical rods, and the front bottom of the soil transport platform is placed on the left and right horizontal rods. The rear ends of the left and right horizontal bars are the bottom of the soil transport platform, and the soil transport platform is pivoted to a fulcrum located between the front end of the bottom and the rear end of the bottom. A rice field leveling machine for a tractor, characterized by having a soil inlet in a position opposite to the rear of a plow.