JP2616751B2 - Walking rice transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a walking type rice transplanter constructed so that left and right wheels linked by a linking body can move up and down.

[0002]

2. Description of the Related Art As this kind of prior art, there is Japanese Utility Model Laid-Open No.
As shown in JP-A-87016, a motor mounting table is provided substantially linearly with a frame provided at the rear of the transmission case, and right and left wheels are provided so as to protrude upward from left and right transmission cases respectively mounted with left and right wheels. The connecting body connected to the transmission case operating arm is provided on the motor mounting table.

[0003]

In the above-mentioned prior art, the transmission case, the prime mover mounting table and the frame are formed substantially in a straight line, and in order to increase the strength of the body, each member must be enlarged. However, it has a heavy body structure, poor running performance and operability, and poor rice transplanting efficiency, making it difficult to perform good rice transplanting.

The left and right transmission case operating arms extend to a position higher than the upper end of the connection between the transmission case and the frame, and the connecting body is also disposed at a position higher than the upper end of the connection between the transmission case and the frame. Therefore, the configuration in which the position of the center of gravity of the front part of the body is increased, the body balance and running stability are deteriorated, and further, it is difficult to perform good rice transplanting work.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention provides an airframe having a prime mover mounting base and a frame provided with a prime mover at a front part and a rear part of a transmission case, respectively. The connecting portion between the transmission case and the frame is high, and the front end side of the prime mover mounting table and the rear end side of the frame are configured in an inverted V-shape in a side view, and the transmission case is located below the connecting portion with the prime mover mounting base. In a walk-behind rice transplanter equipped with the base of a left and right transmission case with wheels mounted on the left and right sides of the projecting portion of the transmission case, through holes provided on the left and right sides of the motor mounting table. Left and right transmission cases are provided so that the left and right end sides of a linking body linking the left and right wheels project, and are attached to the left and right end sides of the linking body and the bases of the left and right transmission cases, and the leading ends project upward. The operation arm is connected to the left and right sides of the motor mounting table so that the left and right wheels can move up and down, and the connecting body and the transmission case operation arm are lower than the upper end of the connection between the transmission case and the frame. It is a walking rice transplanter characterized by being mounted at a position.

[0006]

According to the present invention, an airframe having a prime mover mounting table and a frame mounted on the front and rear portions of the transmission case, respectively, can be mounted on the prime mover with a high connection between the mission case and the frame. The front end side of the mounting table and the rear end side of the frame are formed in a U shape in a low side view, so that the strength of the body can be increased with a lightweight configuration without using a large frame, and walking performance and operability are good. A rice transplanter can be obtained.

[0007] In addition, the transmission case is protruded below the connecting portion with the motor mounting table, and the left and right sides of the protruding portion of the transmission case are mounted on the left and right sides with the base of the left and right transmission case mounted thereon. Since the type rice transplanter is used, the base of the left and right transmission case can be arranged at a low position on the fuselage.Furthermore, the left and right end sides of the linking body connecting the left and right wheels project from the holes provided on the left and right side surfaces of the motor mounting table. The left and right end sides of the connecting body are connected to the left and right transmission case operating arms, which are attached to the respective bases of the left and right transmission cases and whose leading ends protrude upward, on the left and right sides of the motor mount. The left and right wheels can be moved up and down, and the linking body and the transmission case operating arm are installed at a position lower than the upper end of the connection between the transmission case and the frame. Since it is possible to lower the center of gravity of the aircraft, the walking type rice planting machine capable of traveling promote stability well at the left and right wheels.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. Reference numeral 1 denotes a traveling body, which is a transmission case 2 and a motor mounting table 3 attached to a front portion of the transmission case 2.
And the frame 4 attached to the rear of the transmission case 2
And so on.

5 is a prime mover, 6 is a fuel tank, 7a and 7b
Is a hydraulic pump case. Reference numerals 8a and 8b denote transmission cases, the bases of which are pivotally mounted on bosses that house drive shafts projecting to the left and right sides of the transmission case 2 so that the front ends are located rearward and free to move up and down. Wheels 9a and 9b are journaled on the transmission cases 8a and 8b, and are provided to be vertically movable while being rotated.

Reference numeral 10 denotes a connecting body, which is provided with a reinforcing bracket 11 attached to a front portion of the motor mounting table 3 and a left and right intermediate portion is pivotally connected to the metal bracket 11 by a pin 12, and the side plate of the motor mounting table 3 and the metal 11 are connected. An elongated hole 13 is formed in the side plate portion, and is inserted through the elongated hole 13 so that the left and right ends protrude outward, and swing in a balance within a certain range. 14a ・ 14b
Is a hydraulic cylinder device, and transmission case operating arms 16a and 16b integrally attached to left and right outer end portions of the connecting body 10 and pivotal metal members 15a and 15b attached to base portions of the transmission cases 8a and 8b. It is interposed between and. That is, the connecting metal fittings 17. 1 attached to the connecting body 10.
7, a telescopic member 19 composed of a shaft 19a and a cylinder 19b provided in a direction in which it is always extended by springs 18 is attached, a base of a cylinder is mounted on the telescopic member 19, and a piston tip is connected to the transmission case operating arm 16a. When the piston protrudes, the wheel on that side is moved down. At this time, a force is also applied to the other wheel via the springs 18, 18 and a cylinder device. I have.

The hydraulic device A will be described. A hydraulic tank 20 is provided at an intermediate portion between left and right, and hydraulic pumps 21a are provided on both sides thereof.
A hydraulic pump case 7a, 7b in which a hydraulic pump 21b and a hydraulic pressure switching valve 22a, 22b are integrated is integrally mounted, and a hydraulic device A is mounted on an upper front side of the transmission case 2. It is needless to say that the hydraulic device A may be provided on the motor mount 3 at the rear side of the motor 5. 23a and 23b are hydraulic switching levers.

Reference numerals 24a and 24b denote left and right ground contact floats which function as sensors for detecting the inclination of the body in the left and right directions with respect to the field scene. The floats are disposed at front portions of the wheels 9a and 9b, respectively. Metal fittings 26.2 are attached to crank-shaped pipes 25a and 25b which are independently pivoted, respectively.
6 and a support shaft 27.2 whose rear portion is mounted on the outside of a pivot shaft of the transmission case 8a or 8b.
7 is suspended via connecting tools 28 so as not to move below a certain level.

Reference numeral 29 denotes a connecting rod for connecting the ground floats 24a and 24b to the hydraulic pressure switching levers 23a and 23a.
30 and a turnbuckle 31 for expansion and contraction adjustment. When the ground floats 24a and 24b move upward, the hydraulic switching valves 22a and 22b are switched so that the pistons of the hydraulic cylinder devices 14a and 14b protrude.

Reference numeral 32 denotes a grounding float, and reference numerals 33, 33 denote side grounding floats, each of which is provided so that a front side thereof can freely move up and down with a rear side as a fulcrum. 34 is a rice transplanting device,
It is connected to the rear part of the frame 4. Explaining this, reference numeral 35 denotes a planting transmission case, in which a cylindrical case 35b is protruded on both left and right sides of a main case portion 35a, and sub case portions 35c are provided on the cylindrical case 35b.

Reference numeral 36 denotes a seedling attachment, and the main case 35a
Are mounted on both left and right sides and inside portions of the left and right sub-cases 35c by a crank and a swing arm.
37 is a handle mounting frame. Reference numeral 38 denotes a steering handle. Reference numeral 39 denotes a seedling tank,
Is mounted on a reciprocating lateral movement device in the planting transmission case 35 via a moving rod 40 and a metal fitting 41 so as to be reciprocally movable laterally left and right.

A seedling receiving tool 42 having a seedling dividing port is provided in front of the seedling tank 39, and the seedling attaching tools 36 split the seedlings from the seedling dividing port. The ground float 32 and the side ground floats 33 are pivotally adjusted at the rear by an arm 45 fixed to a shaft 44 which is rotated and adjusted by an adjustment lever 43. The front is formed by a frame 4 and sub-cases 35c. Are attached to the pallets by hanging members 46, 47, 47. Reference numerals 48 and 48 denote wheel trace erasers. In the illustrated example, the base is rotatably mounted on the shaft 44 via a metal fitting. The trace eraser is made of a rubber plate.

Reference numeral 49 denotes a sensing adjustment lever, which is provided on an operation panel 50 attached to the steering handle 38 so as to be rotatable and adjustable. One end of a wire 51 attached to the lever 49 is integrated with the hydraulic tank 20. Mounting frame 52
Arms 55a and 55 fixed to the left and right ends of the shaft 53, respectively.
b and the hydraulic pressure switching levers 23a and 23b
6a and 56b, and the hydraulic pressure switching valves 22a and 22b
Is configured to be able to be changed by the tension of the springs 56a and 56b.

Reference numeral 57 denotes a clutch operation lever which also serves as a hydraulic operation lever. Numeral 58 denotes a seedling-planting clutch, which is a fixed-position stop clutch. A cam 60 with a clutch pawl that urges the pawl provided on the side surface of the gear 59 into a resilient engagement state by a spring is attached to the rotating shaft. The clutch 60 is provided with a clutch pin 61 which is urged by a spring to come into contact with the cam 60 to disconnect the clutch. And this clutch pin 6
1 is linked to the clutch operation lever 57 by a wire 62.

Reference numeral 63 denotes a switching valve simultaneous operating mechanism for switching the hydraulic switching levers 23a and 23b in a direction to simultaneously pull up the left and right ground floats 24a and 24b to lower both the left and right wheels 9a and 9b. A pair of left and right cylindrical bodies 65a and 6
5b, and the hydraulic switching levers 23a
A pin 66a / 66b having one end loosely attached to 3b is fitted and fitted, and an operating plate 68 provided in a direction in which the ends of the pins 66a / 66b are urged and pushed by strong tension springs 67a / 67b. The metal fitting 64 is connected to the clutch operating lever 57 by a wire 69. The clutch operating lever 57 is inserted into the guide hole 50a of the panel 50 attached to the steering handle 38. At the point A, the seedling-planting clutch 58 is "ON", at the point B, the seedling-planting clutch "OFF", at the point C, , The hydraulic switching valves 22a and 22b are set to the neutral position while the seedling mounting clutch is "off" and the wheels 9a and 9b are moved downward at the two points while the seedling mounting clutch is "off".

In the figure, reference numeral 69 denotes a main clutch lever, and 70 denotes a bonnet. Next, the operation of the above example will be described. After placing the machine in the paddy field, the seedlings are placed and stored in the seedling tank 39, the main clutch is turned on, and the clutch operation using the hydraulic operating lever is also performed. The lever 57 is operated to the portion A of the guide hole 50a of the operation panel 50.

Then, the left and right hydraulic pumps 21a and 21b
Is transmitted and rotated, the transmission mechanism in the transmission case 2 is transmitted, and further, each rotating part of the rice transplanting device of the work machine 34 is transmitted. That is, each of the ground floats 24a and 24b
The wheels 9a and 9b are rotated in a state where 32.33.33 is in contact with the topsoil of the paddy field, the body is propelled, and the seedlings in the seedling tank 39 in which each seedling attachment 36 reciprocates right and left. The plant is divided and planted one after another on the soil surface grounded by each of the ground floats 32, 33, 33.

During the seedling planting operation, the traveling machine is automatically controlled to move up and down as follows. That is, when the tillage is deep, the wheels 9a and 9b are on the basis of the tillage, so that each of the ground floats is pushed up on the surface of the paddy field. At this time, the left and right ground floats 24a and 24b rotate upward around the base-side pivot points of the pipes 25a and 25b.

Accordingly, the left and right hydraulic switching levers 23a and 23b are rotated in the direction of arrow E via the rods 29 and 29, and the hydraulic switching valves 22a and 22b are moved in the directions in which the respective pistons of the hydraulic cylinder devices 14a and 14b project. Is switched to Therefore, the traveling body is raised as soon as the left and right wheels 9a and 9b are moved downward, and each ground float is operated downward. Then, when the contact pressure becomes an appropriate pressure for the seedling planting operation, the hydraulic switching valves 22a and 22b are switched to the neutral state, and the projecting operation of the piston is stopped.

On the other hand, if the cultivator is shallow, the traveling body will rise greatly from the topsoil of the paddy field, so that the left and right landing floats 24a.
24b moves down. Accordingly, the hydraulic switching valves 22a and 22b are switched via the rods 29 and 29 in the direction in which the hydraulic piston retracts, and the left and right wheels 9a and 9b receive the body load and move upward, so that the body descends. Then, when the ground pressure becomes appropriate, the hydraulic pressure switching valves 22a and 22b are switched to neutral.

However, the depth of the cultivator is determined by the right and left wheels 9a and 9a.
At the position b, it hardly changes up and down by a certain amount at the same time, and in most paddy fields, the left and right cultivators also have irregularities and change. In such a case, the body 1 is normally propelled while leaning left and right, but in the embodiment of the present invention, the base side of each of the hydraulic cylinder devices 14a and 14b is attached to the tip side of the connecting body 10. Wheel 9
Since the a and 9b are configured to be operated by the balance in the up and down directions, the contact pressures of the left and right wheels 9a and 9b with the cultivator are almost the same. However, when the tillage machine has a large level difference between the left and right, it is not possible to hold the body 1 horizontally horizontally only by the balance operation. That is, when the left and right depths of the tillage are not so large, the linking body 10 can sufficiently adapt to this and keep the body 1 horizontal, but cannot adapt at large steps.

Due to this large difference in tillage depth, the airframe 1
Of course, one of the ground floats 24
a or 24b is pivoted upward, and the ground float 24b or 24a on the opposite side is moved downward. Therefore, the hydraulic switching valves 22a and 22b are switched in the opposite directions, the left and right wheels 9a and 9b move up and down in reverse according to the above-described operation theory, and the body 1 is controlled to the left and right horizontal state.

Therefore, in the case where the balance of the small plow is changed or the balance is lost due to the movement of the seedling tank 39 to the left or right, the connecting body 10 sufficiently keeps the body 1 in a horizontal state. Then, only when the tillage changes greatly, the left and right hydraulic cylinder devices 14a and 14b operate to quickly control the body 1 in the left and right horizontal state. Therefore, the hydraulic cylinder devices 14a and 14b do not operate frequently, and are propelled extremely smoothly. Further, it is not necessary to increase the swing amount of the balance, so that the restoration can be performed quickly and the traveling can be performed smoothly as compared with the case of simply having the conventional balance.

When it is desired to change the controlled sensitivity when the topsoil of the paddy field is hard or soft,
By operating the sensitivity adjusting lever 49, the tension of the springs 56a and 56b may be changed and adjusted. When the left and right wheels 9a and 9b are both moved down, such as when going over a ridge, the clutch operation lever 57 is moved to the guide hole 50a of the guide panel 50.
In this case, the left and right pins 66a and 66b push the operating plate 68 at a stroke by the urging force of the spring 67a, and the hydraulic switching lever 23a is pressed against the springs 30 and 56a and 56b. 23b is rotated in the direction of arrow E, and the hydraulic switching valves 22a and 22b are set to the front ground float 24a.
The same condition as when 24b has been moved up is moved up, the pistons of the hydraulic cylinders 14a and 14b are simultaneously protruded, and the wheels 9a and 9b are moved down, so that the body 1 can be raised up. In this state, you need to go over the ridge.

In particular, an airframe provided with a motor mounting table and a frame on each of which a motor is mounted at the front and rear portions of the transmission case is mounted on the front end side of the motor mounting table with a high connection between the transmission case and the frame. And the rear end side of the frame is shaped like a letter in a side view, so that the strength of the fuselage can be increased with a lightweight structure without using a large frame, making it a walking type rice transplanter with good running performance and operability. Further, the transmission case is protruded below the connection portion with the motor mounting base, and the left and right sides of the protruding portion of the transmission case are mounted on the right and left sides of the left and right transmission case. The base of the left and right transmission case can be placed at a lower position on the fuselage.
The left and right ends of the connecting body connecting the left and right wheels are provided so as to protrude from the holes provided on the left and right side surfaces of the motor mounting base, and the left and right end sides of the connecting body and the left and right transmission cases are attached to the respective base portions and the leading end side is provided. The left and right transmission case operating arms protruding upward are connected on the left and right sides of the motor mounting table so that the left and right wheels can move up and down, and the link body and the transmission case operation arm are connected to the transmission case. Synergistic with the configuration equipped at a position lower than the upper end of the connection with the frame, it is possible to lower the center of gravity of the aircraft as a whole,
Since the walking type rice transplanter can be propelled by the left and right wheels with good running stability, a good rice transplanting operation can be performed.

In the illustrated embodiment, the clutch operating lever 5
In 7, the hydraulic operating lever is also used so as to switch the hydraulic switching valves 22a and 22b. However, it is not always necessary to use the dual-purpose type, and it is a matter of course that each operating lever may be provided separately. In addition, a fixing device that can appropriately fix the linking body 10 may be provided. In this case, it is useful when traveling on a road.

[Brief description of the drawings]

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

FIG. 2 is an overall plan view of a walkable rice transplanter with a part omitted.

FIG. 3 is a perspective view for explaining the operation of the connecting body.

FIG. 4 is a side view for explaining the operation of the hydraulic device.

FIG. 5 is a plan view illustrating the operation of the hydraulic device.

FIG. 6 is a perspective view illustrating the operation of the seedling mounting clutch.

FIG. 7 is a rear view illustrating the operation of the clutch operation lever.

FIG. 8 is a hydraulic circuit diagram.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Airframe 2 Transmission case 3 Prime mover mounting stand 4 Frame 5 Prime mover 8a / 8b Left / right transmission case 9a / 9b Left / right wheel 10 Linked body 16a / 16b Transmission case operating arm

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Tatsuyuki Ouchi 1 Tokura-cho, Tobe-cho, Iyo-gun, Ehime Prefecture Iseki Agricultural Machinery Co., Ltd. (72) Inventor Riiki Seike 1-Hachikura, Tobe-cho, Iyo-gun, Ehime, Iseki Akira Koriyama, Examiner, Agricultural Machinery Co., Ltd. (56) References JP-A-56-113221 (JP, A) JP-A-55-83918 (JP, U)

Claims (1)

(57) [Claims] 1. A body provided with a motor mounting table and a frame on each of which a motor is mounted at a front portion and a rear portion of a transmission case, and a front end side of the motor mounting table and a frame having a high connection portion between the transmission case and the frame. The rear end side of the transmission case is formed in a U shape in a low side view, and the transmission case is protruded below a connection portion with the motor mounting table, and wheels are provided on both left and right sides of the protruding portion of the transmission case. In a walk-behind rice transplanter equipped with a base of a left and right transmission case equipped with a motor, a left and right end side of a connecting body connecting left and right wheels is provided to project from holes provided on left and right side surfaces of the motor mounting table, and the connecting body is provided. The left and right wheels are connected by the left and right sides of the motor mounting table between the left and right end sides of the motor case and the left and right transmission case operating arms which are attached to the bases of the left and right transmission cases and whose distal ends project upward. To be able to move,
A walk-behind rice transplanter, wherein the connecting body and the transmission case operating arm are provided at a position lower than an upper end of a connecting portion between the transmission case and the frame.