JP2824690B2 - Horizontal control mechanism in paddy working machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to paddy field work such as a rice transplanter, a seeder, a fertilizer, and the like, in which a float is provided at a lower portion of a traveling body and left and right swing wheels are provided on both sides of the body. Pertaining to a horizontal control mechanism in the machine.

[Conventional technology]

Generally, there is known a paddy working machine of this type that horizontally controls a body posture by changing a relative height of a swing wheel in conjunction with a swing of a gravity sensor that detects the inclination of the body.

[Problems to be solved by the present invention]

However, the conventional horizontal control mechanism using a gravity sensor always controls the airframe based on the direction of the center of gravity regardless of the field surface of the field, so that the planting accuracy on the field surface is not good.
Therefore, in order to improve planting accuracy, it is desirable to control the aircraft attitude so as to be parallel to the float sliding on the rice field surface with reference to the rice field surface. If the vehicle is controlled in parallel with the float, there is a problem that the vehicle often travels in an unstable state while being inclined when traveling on a road or the like.

In view of the above situation, the present invention is to detect the horizontal inclination of the airframe with a gravity sensor, but in a normal paddy field working state, it is possible to perform horizontal control based on the field surface of the field by controlling the swing of the gravity sensor. It is an object of the present invention to provide a horizontal control mechanism in a paddy working machine that can perform absolute horizontal control based on the direction of gravity by releasing the check of a gravity sensor when traveling on a road in a non-working state. It was an issue.

[Means for solving the problem]

In order to solve the above problems, the technical measures taken by the present invention are to provide a float at the lower part of the fuselage, provide left and right swing wheels on both sides of the fuselage, and link the relative height of the swing wheel to the gravity sensor. In the paddy field working machine to change, the deflection of the gravity sensor is restrained by a restraining member linked to the movement of the float, and the attitude of the aircraft is horizontally controlled based on the rice field surface,
In a non-working state in which the float is lowered, the restraint member is configured to release restraint of the gravity sensor by the restraint member.

[Function of the invention]

Thus, according to the present invention, when the body of the paddy field working machine tilts left and right, the gravity sensor swings to detect the tilt, and the relative height of the swing wheel is changed in conjunction with this. At this time, since the restraint member linked to the movement of the float restrains the deflection of the gravity sensor, the body attitude is horizontally controlled to an appropriate planting attitude based on the rice field on which the float slides. When the non-working state is set, the traction member moves down in conjunction with the lowering of the float, and the gravitation sensor is released from traction, so that only the gravity sensor controls the aircraft based on the direction of gravity. Therefore, the attitude of the body at the time of traveling on a road or the like can be controlled to be absolutely horizontal, and the vehicle can travel in a stable state.

〔Example〕

Next, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. Reference numeral 1 denotes a traveling machine of a walk-behind rice transplanter exemplified as a paddy working machine. A main float 4 is provided at a lower portion of a machine frame 3 on which an engine 2 is mounted, and a swing supported by a chain case 5 is provided on both sides thereof. Wheels 6 are provided. Reference numeral 7 denotes a traction member linked to the movement of the main float 4. The traction member 7 is fixed to the left and right center positions on the front side of the main float 4, and is pivotally supported by pivot pins 8 in the front-rear direction. The rear end is supported by a pin 10 on the body frame 3 side via an adjuster 9 so as to be vertically swingable. On the other hand, at the rear end of the main float 4, a bracket 11 fixed to the left and right center position is pivotally supported by a pivot pin 12 in the front-rear direction, so that the main float 4 is freely rollable. Also, a left-right pin 13 fixed to the pivot pin 12
Are supported by an adjustment hanger 14, and by operating a lever 15, the rear portion of the main float 4 is moved up and down with respect to the body frame 3 to adjust the planting depth. Reference numeral 16 denotes an operation handle extending upward and rearward from the rear end of the body frame 3, reference numeral 17 denotes a front-back and rear-high seedling mounting table, and reference numeral 18 denotes a seedling mounting rod.

The swing wheel 6 is connected to a swing shaft 19 of the chain case 5.
The rotating arm 20 protruding from the control mechanism 22
The swing wheel 6 is moved up and down simultaneously in the left and right directions or in directions opposite to each other in accordance with the inclination of the traveling body 1, and the attitude of the body is controlled. Is configured. That is, a main valve 24 connected to an oil passage from a hydraulic pump is provided above a transmission 23 disposed at the rear of the engine 2.
The cylinder rod 26 of the main cylinder 25 is extended and retracted toward the rear of the machine in conjunction with the main valve 24. At the rear end of the cylinder rod 26, a sliding piece 27 is elastically supported via an elastic machine 28, and a vertical pivot 27a of the sliding piece 27 is provided.
In addition, a central portion of a lifter 29 composed of two plates is supported so as to be horizontally swingable.

A plate 30 is integrally fixed to the rear surface of the transmission 23, and a pair of left and right guide bars 32 is provided between the plate 30 and a support blanket 31 erected on the body frame 3. A slide holder 33 is slidably supported on the slide holder 32. And slide holder 33
The cylinder rod 34a of the sub cylinder 34 is supported between the left and right mounting arms 33a, and the cylinder cylinder 34b moves left and right between the opposing mounting arms 33a by oil supply from a sub valve 35 provided on the rear surface of the engine 2. .

On the upper surface of the slide holder 33, a pivot arm 36 is provided with a lifter 29.
A work arm 37 is integrally formed in the center of the lifter 29 in the direction of the slide holder 33, and pivots on a pin shaft 38 provided at the base end of the work arm 37. The extension end of the support arm 36 is pivotally supported so as to be swingable. A front and rear slot-shaped through hole is drilled at the tip of the working arm 37, and an operating pin 39 protruding from the cylinder tube 34b is provided with a left-right guide 40 drilled through the slide holder 33 and the above-mentioned through hole. Penetrates.

The connecting rod 21 is connected to both left and right sides of the lifter 29, and when the main valve 24 operates, the cylinder rod 26
Moves the lifter 29 back and forth to swing the
Are simultaneously moved up and down, and when the sub-valve 35 is actuated, the lifter 29 horizontally swings with the movement of the cylinder tube 34b, and the swing wheel 6 is moved up and down in the opposite direction to each other.

Numeral 41 denotes a gravity sensor provided at the left and right centers of the fuselage. As shown in FIG. 3, a base end of a sensing arm 42 connected to the sub-valve 35 is attached to a bracket 43 on the fuselage side in a longitudinal direction. And a lower end of a connecting arm 45 vertically attached to the boss portion 44 is connected to a weight sensor via a ball joint 46.
It is linked to the upper end of 47. Weight sensor 47 above
The middle part is pivotally supported by a pivot shaft 48 on the side of the fuselage and has a drooping shape.When the weight sensor 47 swings left and right, the connecting arm 45 swings in the opposite direction, and the sensing arm 42 rotates integrally. Then, the sub-valve 35 is operated. And main float 4
The restraint member 7 linked to the above movement is located below the weight sensor 47. In the restraint member 7, the side plates 7a rising upward face the left and right sides of the weight sensor 47 with a predetermined space therebetween, and the upper end side is expanded outward. When the main float 4 is substantially horizontal,
Even when the weight sensor 47 swings, the sub-valve 35 does not operate in the area A between the opposing sides of the side plate 7a. When the main float 4 tilts, the weight sensor 47 further swings,
For the first time, the sub-valve 35 is actuated to control the aircraft horizontally.

When the non-working state is set, the main float 4 is largely lowered, and accordingly, the traction member 7 linked to the movement of the main float 4 is moved down to release the traction of the weight sensor 47. I have.

49 is a stopper for restricting rolling at the lower limit position of the main float 4, 50 is a front rotation stopper of the main float 4, and 51 and 52 are rear rotation stoppers.

In the above-described configuration, when performing the planting operation, the swing wheel 6 travels on the cultivator, and the main float 4 slides along the field surface of the field, while the seedlings on the seedling mounting table 17 are moved by the seedling mounting rod 18. And plant it on the rice field. During the operation, when the sensing rod (not shown) detects the vertical movement of the machine due to the change in unevenness of the tillage, the main valve 24 operates and the main cylinder 24 operates.
The 25 cylinder rods 26 are extended and retracted, the lifters 29 move back and forth, the swing wheels 6 move up and down at the same time, and the main floats 4 also swing up and down by the adjusters 9 to control the body posture.

When the weight sensor 47 swings right and left and the rotated sensing arm 42 operates the sub-valve 35, the swing wheel 6
The sub-valve 35 does not operate even when the weight sensor 47 swings between the opposing sides A of the side plate 7a in a place where the field is flat (FIG. 4 (a)). ). Then, when the machine body tilts due to unevenness of the tillage, the weight sensor 47 tends to swing greatly, but the main float 4
Since the sub-valve 35 is actuated after the contact with the restraint member 7 provided in (2) (FIG. 4 (b)), the weight sensor 47
But don't be too sensitive. The attitude of the aircraft is controlled with respect to the weight sensor 47 restrained by the restraint member 7,
Since the swing wheel 6 moves up and down until it becomes parallel to the main float 4, even if the field in the field becomes flat again, the operation can be performed without operating the sub-valve 35 (FIG. 4 (c)). Therefore, main float 4
Since the aircraft can be horizontally controlled with reference to the field surface of the field where the skier slides, the work can be performed smoothly with good planting accuracy. In addition, even when the aircraft is tilted together with the main float 4 on a ridge or the like where the tillage has a step, the weight sensor 47 controls the attitude of the aircraft without being restrained by the restraining member 7, so that the aircraft travels while being inclined. Never. When the non-working state is set, the main float 4 descends greatly, and in conjunction with this, the traction member 7 moves down to below the weight sensor 47 to release the traction of the gravity sensor 41. Only the center of gravity is used as a reference to control the aircraft. Therefore, the vehicle can be driven in a stable state by controlling the attitude of the body to be absolutely horizontal, for example, when traveling on a road. Moreover, since the gravity sensor 41 is provided at the left and right centers of the fuselage, the tilt of the fuselage can be accurately detected. It can be weight. Although the main float 4 rolls in the range B (FIG. 4 (d)), in a non-working state in which the main float 4 descends to the lower limit position, the stopper 49 abuts on the restraint member 7 to secure the main float 4 safely. Can be fixed.

In this embodiment, the restraint member 7 is connected to the main float 4.
Is shown fixed to the front side, but the present invention is not limited to this, and it is essential that the restraint member 7 be operated in connection with the movement of the float.

〔The invention's effect〕

In short, the present invention provides a paddy working machine in which a float is provided at a lower portion of a body, left and right swing wheels are provided on both sides of the body, and a relative height of the swing wheels is changed in conjunction with a gravity sensor. Because the swing of the float was restrained by the restraint member linked to the movement of the float and the aircraft attitude was horizontally controlled based on the rice field surface, and in the non-working state where the float descended, the restraint of the gravity sensor by the restraint member was released. Also, even if the body tilts to the left or right during the operation by the paddy field working machine, the gravity sensor detects the tilt of the body, and the relative height of the left and right swing wheels can be changed in conjunction with this. At this time, the restraint member linked to the movement of the float restrains the deflection of the gravity sensor, so that the aircraft attitude can be horizontally controlled to an appropriate planting attitude as a reference for the rice field on which the float slides. Then, when the non-working state is set, the traction member moved downward in conjunction with the movement of the float releases the traction of the gravity sensor, so that the body can be controlled based on the gravitational direction only by the gravity sensor. Therefore, the vehicle can be driven in a stable state by controlling the attitude of the body to be absolutely horizontal, for example, when traveling on a road.

[Brief description of the drawings]

The drawings show an embodiment of a horizontal control mechanism in a paddy working machine according to the present invention. FIG. 1 is an overall side view of the paddy working machine, FIG. 2 is a perspective view of the control mechanism, and FIG. 4 (a), (b), (c), and (d) are operation explanatory views. In the figure, 4 ... Main float, 6 ... Swing wheels, 7
... A check member, 22 a control mechanism, and 41 a gravity sensor.

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-1-317306 (JP, A) JP-A-2-113812 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) A01C 11/02 334

Claims (1)

(57) [Claims] 1. A paddy working machine wherein a float is provided at a lower portion of a body, left and right swing wheels are provided on both sides of the body, and a relative height of the swing wheel is changed in conjunction with a gravity sensor. In addition to controlling the aircraft attitude horizontally with respect to the rice field surface by restraining with a restraining member linked to the movement of the float, it is configured to release the restraint of the gravity sensor by the above restraining member in the non-working state where the float descends. Horizontal control mechanism in paddy working machine.