JPH10178805A - Paddy working machine - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To facilitate operation of an aircraft during weeding work. SOLUTION: Instead of a seedling planting device, a weeding device 7 is connected to the rear end of an elevating link mechanism 6 provided at the rear part of the body of the rice transplanter. A grounding sensor for rotatably supporting a weeding rotor 9 having a claw 8 around a horizontal axis O on a support frame 10 and detecting a depth of the grass scraping claw 8 against a mud surface ahead of the weeding rotor 9. And control means 12 for raising and lowering the drive unit 5 of the lifting link mechanism 6 based on the detection result of the grounding sensor 11 so that the mud surface depth of the grass picking claw 8 is kept constant. It is.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paddy field working machine for removing grass that has grown between rows of each seedling after planting the seedlings, and more particularly, to a rear end of an elevating link mechanism provided at a rear portion of the body of the rice planting machine. Then, a weeding device is connected in place of the seedling planting device, and in order to constitute this weeding device, a weeding rotor having a grass-raising claw on an outer peripheral portion is rotatably supported by a support frame around a horizontal axis. Work equipment for paddy fields.

[0002]

2. Description of the Related Art Conventionally, in the above-mentioned paddy field working machine, the weeding device is merely connected to a rear end of a lifting link mechanism provided at a rear portion of a traveling body of the rice transplanter.

[0003]

According to the above-mentioned conventional construction, the weeding device has a structure in which it is simply connected to the rear end of an elevating link mechanism provided at a rear portion of a traveling body of a rice transplanter. The pitching of the fuselage (swaying back and forth) may change the mud depth of the grass-raising claws. To prevent this, the driver looks back and adjusts the grass-raising claw depth. The elevating link mechanism was operated to raise and lower so as to keep it constant.

In other words, according to the above-mentioned conventional configuration, the steering operation of the body so that the front wheel passes between the planted seedlings and the depth of the grass-raising claws against the mud surface are kept constant. The raising and lowering operation of the raising and lowering link mechanism while looking back has to be performed together, which makes the weeding work difficult.

The present invention has been made in view of the above circumstances, and an object of the present invention is to make it possible to perform a weeding operation easily.

[0006]

[Means for Solving the Problems]

[Structure] According to the characteristic structure of the invention according to claim 1, in the paddy field working machine described at the beginning, a grounding sensor for detecting a depth of the grass scraping claw against a mud surface is provided in front of the weeding rotor. And control means for raising and lowering the drive unit of the lifting link mechanism based on the detection result of the grounding sensor so that the mud surface depth of the grass picking claw is kept constant. .

According to a second aspect of the present invention, in the first aspect of the present invention, a state in which an upper support frame portion connecting the support frame to a rear end of the lifting link mechanism and the weeding rotor is connected. And the lower support frame portion rotatably supported around the longitudinal axis on the upper support frame portion, and a balance weight mounting portion is provided on the upper support frame portion.

A feature of the invention according to claim 3 is that, in the invention according to claim 2, the upper support frame portion extends to the upper rear side of the weeding rotor.

According to the first aspect of the present invention, in a weeding operation for removing grass that has grown between the strips of each seedling after planting the seedlings, if the body is pitched, the grounding sensor scrapes the grass around the outer periphery of the weeding rotor. The control means detects the depth of the raising claws against the mud surface, and controls the drive unit of the lifting link mechanism up and down based on the detection result, thereby keeping the depth of the mud surface of the grass picking claw constant.

[0010] For example, if the grounding sensor is too far behind the rear wheel, when the aircraft is meandering, the horizontal vibration of the grounding sensor increases. The ground contact sensor is located in front of the weeding rotor and close to the rear wheel, so that the horizontal deflection is reduced even when the aircraft meanders.

According to the second aspect of the present invention, in addition to the same effect as that of the first aspect, the lower supporting frame portion to which the weeding rotor is connected can be attached to the upper supporting frame portion. Since the weeding rotor is composed of a plurality of rotor portions corresponding to a plurality of rows of the seedlings, the rotors are rotatably supported around the longitudinal axis. The mowing surface of the mowing part of the rotor is well adapted to the mud surface.For example, only the mowing surface of the rotor part located on the left and right center sides of the fuselage has its mud surface depth set to the set value. Disappears.

Also, since the balance weight can be attached to the balance weight attachment portion of the upper support frame portion, a weeding device lighter in weight than the seedling planting device is connected to the lifting link instead of the seedling planting device. The collapse of the front-rear balance of the aircraft due to the above can be suppressed. Since the balance weight mounting portion is provided on the upper support frame portion which is connected to the rear end of the elevating link mechanism and is in a stable state, for example, the upper support frame portion is rotatable around the longitudinal axis. The balance in the left-right direction of the body when the balance weight is attached can be stabilized as compared with the structure in which the balance weight attachment portion is provided on the lower support frame portion.

According to the third aspect of the present invention, in addition to the effect similar to the operation of the second aspect, the upper supporting frame portion extends to the rear upper side of the weeding rotor. Therefore, even if another object relatively approaches the weeding rotor from the rear, for example, the other end can receive the other object at the rear end of the upper support frame portion and prevent the other object from colliding with the weeding rotor.

According to the first aspect of the present invention, the driver does not need to perform the raising / lowering operation of the lifting / lowering link mechanism while looking at the rear, and steers the front wheel so that the front wheel does not step on the seedling. The operation of the aircraft during weeding work became easier. Also, even if the aircraft meanders,
The lateral deflection of the ground contact sensor was reduced, and the pushing down of the seedling by the ground contact sensor was prevented.

According to the configuration of claim 2, in addition to the same operation as the operation of the above-described configuration of claim 1, the following operation can be obtained. When a plurality of rotor parts of the weeding rotor are supported by the support frame so as to be able to correspond to a plurality of strips of the seedling, respectively, even if the body is tilted in the left-right direction, the grass-raising claws of each rotor part are well placed on muddy surfaces. Familiarity, only the grass picking claw on the center side in the left and right direction of the aircraft,
The mud surface depth is no longer set to the set value, and it is possible to prevent nails that float up from the mud surface or stick too deeply, and that weeding can be performed evenly. Was. In addition, since the front-rear, front-rear, and left-right balance of the aircraft can be stabilized, a decrease in steering performance can be suppressed.

According to the structure of claim 3, in addition to the effect similar to the effect of the structure of claim 1 or 2, damage to the grass-raising claws can be prevented.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG.
A seedling planting device on a lifting link mechanism 6 driven by a hydraulic cylinder 5 (corresponding to a drive unit) at the rear of a traveling type rice transplanter equipped with a driving rear wheel 2, a steering handle 3, and a driver seat 4. Instead of (not shown), a weeding device 7 is connected to constitute a paddy field working machine.

As shown in FIG. 2 and FIG.
Is a method in which a weeding rotor 9 composed of seven rotor portions 9A provided with grass-raising claws 8 on an outer peripheral portion is rotatably supported on a support frame 10 around a horizontal axis O, and is disposed between seven streaks of a seedling. A sensor float 1 for detecting the depth of the grass scraper 8 against the mud surface in front of the central rotor portion 9A.
1 (corresponding to a grounding sensor).
1 (more specifically, a detection result of a potentiometer 34 described later linked to the sensor float 11)
A control device 12 (corresponding to control means) for raising and lowering the hydraulic cylinder 5 is provided so that the mud surface depth of the grass-raising claws 8 is kept constant.

Next, the weeding device 7 will be described in detail. As shown in FIGS. 2, 5, and 6, the support frame 10
An upper supporting frame portion 13 connected to the rear end of the lifting link mechanism 6 and a lower side (rolling support) rotatably supported by the upper supporting frame portion 13 around the longitudinal axis P while the weeding rotor 9 is connected. And a support frame portion 14.

The upper support frame portion 13 is composed of a pair of vertical frame members 13A extending laterally and outwardly from a pair of left and right rear links 15 in a vertical position in the elevating link mechanism 6, and from the two vertical frame members 13A to the weeding rotor 9. A frame-shaped rearward frame member 13B extending to the rear upper side, and a frame-shaped first horizontal frame member 13C connected to the rear end of the rearward frame member 13B; The rear link 15 of the elevating link mechanism 6 is connected to a pair of upper and lower round bar-like connecting members 19 provided on 13A. A balance weight mounting portion 16 for mounting a plurality of balance weights W is formed at a longitudinally intermediate portion of the first horizontal frame member 13C.

As shown in FIG. 3, the lower supporting frame portion 14 is constituted by connecting a plurality of second horizontal frame members 20 with a plurality of connecting members 21 extending along the front and rear sides, and the second horizontal frame member 20 on the front side. A first support bracket 22A is provided at the center in the left-right direction (corresponding to the left-right center position of the fuselage) of 20 and a forward-facing cylindrical boss 23 provided on the first support bracket 22A is attached to the lower end of the pair of vertical frames 16. And a front end side of each rearward frame member 13B and the connecting member 21 are connected via a spring 26, and the front and rear shaft cores P are connected as described above. The weeding rotor 9 can be held horizontally by the spring 26 at the time of headland turning or the like.

As shown in FIGS. 2 and 4, the rotor portion 9A of the weeding rotor 9 has a base end of six sheet metal members 27 formed with a plurality of grass scraping claws 8 and a through hole at the center. A pair of star frames 28 are respectively installed on tops of the pair of star frames 28, and the center portions of both star frames 28 are connected to each other by a hexagonal pipe 29, and are rotatable by the lower support frame portion 14. The hexagonal pipe 29 is fitted around a hexagonal shaft 30 to be supported. The hexagonal shaft 30 is linked to a PTO shaft 38 of a fixed rotation side among the two PTO shafts at the rear part of the traveling body A via a bevel gear mechanism 39 so as to drive and rotate each rotor portion 9A. It is. In addition, seven U-shaped weeding plates 31 in plan view are suspended and supported by the front second horizontal frame member 20 so as to cover the front portions of the rotor portions 9A.

As shown in FIG. 2, the sensor float 11
The second support bracket 22B connected to the front of the first support bracket 22A is attached to the front waist link 33.
And a support member 32 extending downward from the second support bracket 22B in a rearward-downward position, and is mounted to be swingable up and down around a rear fulcrum Q on the lower end side of the support member 32,
The intermediate portion of the sensor float 11 in the front-rear direction and the lower surface side of the swing arm 35 of the potentiometer 34 provided on the second support bracket 22B are connected by a first rod 36A, and the second support bracket 22B and the swing arm 35
Of the rocking arm 35 with the second rod 36B.
The sensor float 11 is connected by a spring 37 externally fitted to the second rod 36B so that swing of the sensor float 11 is allowed.
Is biased downward such that the biasing force can be adjusted according to the hardness of the mud. The control device 12 operates the operation valve of the hydraulic cylinder 5 based on the detection result of the potentiometer 34 associated with the vertical movement of the sensor float 11, so that the grass scraping claw 8 can be operated regardless of the pitching of the body.
It is configured to keep the mud surface depth constant.

When removing the weeding device 7 from the lifting link mechanism 6 and storing it, as shown in FIG. 7, after moving the traveling body A to the storage location, the upper support frame portion 1 is moved.
The square pipe portions at both ends of the first horizontal frame member 13C in FIG.
A is fitted inside and fixed with bolts, then removed and stored in a floating state.

[Other Embodiment] In controlling the raising and lowering of the grass-raising claw 8, the other end of the release wire having one end connected to the sensor float 11 is linked to the operating valve of the hydraulic cylinder 5, and the sensor float is controlled. The operating valve may be operated in accordance with the vertical movement of the eleventh wheel 11 so that the mud surface depth of the grass-raising claw is kept constant regardless of the pitching of the body. In this case, the control means 12 has a structure in which the other end of the release wire connected to the sensor float 11 is linked to the operation valve of the hydraulic cylinder 5.

As shown in FIG. 8, a lower support frame portion 14 may be supported at the front end of the upper support frame portion 13 so as to be rotatable about a longitudinal axis R. In other words, the first round boss 41 is provided to protrude forward at the center of the front second horizontal frame member 20 in the left-right direction (corresponding to the center position of the body), and the first round boss 41 is rotatable. A vertical hole is formed at the upper end of the support bracket 42 having a hole externally fitted with the second round boss 43 projecting downward at the front lower end of the upper support frame portion 13. It is rotatably fitted to the vertical hole. According to this configuration, it is possible to reduce the left-right swing on the weeding device 7 side due to the left-right swing of the traveling machine body A, and to make each rotor portion 9A run in the center between the rows of the seedlings. Can prevent the seedlings from being pushed down. The lower support frame portion 14 is attached to the upper support frame portion 13 by the first support frame portion 13.
The round boss 41 is rotatably supported around the axis P.

[Brief description of the drawings]

FIG. 1 is an overall side view of a riding rice transplanter.

FIG. 2 is a longitudinal side view of the weeding device.

FIG. 3 is a longitudinal sectional side view of a main part of the weeding device.

FIG. 4 is a front view showing a rotor portion of the weeding rotor;

FIG. 5 is a front view of the weeding device.

FIG. 6 is a plan view of the weeding device.

FIG. 7 is a side view showing the weeding device in a stored state.

FIG. 8 is a longitudinal sectional side view of another embodiment.

[Explanation of symbols]

 Reference Signs List 5 Drive unit 6 Elevating link mechanism 7 Weeding device 8 Grass picking claw 9 Weeding rotor 10 Support frame 11 Ground sensor 12 Control means 13 Upper support frame portion 14 Lower support frame portion 16 Balance weight attachment portion O Horizontal axis P Front and rear axis core

Claims (3)

[Claims] 1. A weeding device instead of a seedling planting device is connected to the rear end of an elevating link mechanism provided at the rear part of the body of a rice transplanter. A paddy field working machine having a weeding rotor provided rotatably supported on a support frame about a horizontal axis, wherein a depth of the grass scraping claw against a mud surface is detected ahead of the weeding rotor. And a control means for controlling the drive of the lifting link mechanism to move up and down based on the detection result of the grounding sensor so that the mud surface depth of the grass scraping claw is kept constant. Working machine for paddy fields. 2. An upper support frame portion connected to a rear end of the elevating link mechanism and the upper support frame portion connected to the rear end of the lifting link mechanism so as to be rotatable around a longitudinal axis with the upper support frame portion connected. The working machine for a paddy field according to claim 1, further comprising a lower support frame portion, and a balance weight attaching portion provided on the upper support frame portion. 3. The paddy field working machine according to claim 2, wherein the upper support frame portion extends to an upper rear side of the weeding rotor.