JP2514747Y2 - Horizontal control mechanism in paddy work machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a horizontal control mechanism in a paddy working machine such as a rice transplanter, a seeder, and a fertilizer applicator.

[Problems to be solved by conventional techniques and devices]

In general, a horizontal control mechanism is known in which left and right swing wheels are provided on both sides of the machine body, and horizontal control is performed by changing the relative height of the swing wheels in conjunction with a gravity sensor.

However, the conventional horizontal control mechanism using a gravity sensor is
Regardless of the rice field in the field, the aircraft was always horizontally controlled with the direction of gravity as the reference, so the work accuracy on the rice field was not good.

In view of the above situation, the present invention basically senses the lateral inclination of the machine body with a gravity sensor, but at the time of paddy work, controls the machine body posture to an appropriate work posture with reference to the field surface ( It is an object of the present invention to provide a horizontal control mechanism for a paddy work machine capable of performing "Tahira control" hereinafter.

[Means for solving the problem]

In order to solve the above-mentioned problems, the technical means adopted by the present invention is such that the relative heights of the left and right wheels provided on both sides of the body are linked to a gravity sensor that hangs left and right at the center of the body. In the horizontal control mechanism of the paddy work machine to be changed by, a long control rod is extended upward at the left and right center of the float provided at the lower part of the machine body so that it can be rolled, and the upper end of the control rod and the gravity sensor are When the paddy field is connected with a predetermined play interval and the height of the farm field exceeds the predetermined amount in the left-right direction, the control rod linked to the tilting of the float swings the gravity sensor to control the aircraft's posture. It is characterized by having done.

[Action]

When performing paddy work, if the machine tilts due to the tilt of the cultivator, etc., the machine tilts with respect to the vertically hanging gravity sensor,
The aircraft is horizontally controlled so as to maintain the relative positional relationship between the gravity sensor and the aircraft. The float is always supported horizontally against the field surface of the field, and the control rod is linked to the gravity sensor with a certain play interval, so the control rod is positively affected by the tilt of the airframe and a small shake of the float. The gravity sensor is not oscillated.

On the other hand, when the height of the field surface changes significantly in the left-right direction of the aircraft, the float supported by the field surface also largely tilts, and the control rod is tilted beyond the play interval in connection with the tilting of the float and the control is performed. The rod swings the gravity sensor to control the plane with the plane of the field as the reference.

〔Example〕

An embodiment of the present invention will be described in detail with reference to the accompanying drawings. Reference numeral 1 denotes a traveling body of a walk-type rice transplanter exemplified as a paddy working machine, in which a long main float 4 formed of synthetic resin in the front-rear direction is provided below a body frame 3 having an engine 2 mounted on both sides thereof. A swing wheel 6 supported by the chain case 5 is provided. Reference numeral 7 denotes a control rod linked to the movement of the main float 4, and the control rod 7 is vertically fixed to the front center side of the main float 4 via a mounting bracket 7a at a horizontal center position. The mounting bracket 7a is pivotally supported by a pivot pin 8 in the front-rear direction, and a rear end portion of the pivot pin 8 is supported by a pin 10 on the body frame 3 side through an adjuster 9 so as to be vertically swingable. . At the rear end of the main float 4, a bracket 11 fixed to the center position of the left and right is pivotally supported by a pivot pin 12 in the front-rear direction, so that the main float 4 can be rolled. The lateral pin 13 fixed to the pivot pin 12 is supported by the adjusting hanger 14, and the rear part of the main float 4 can be moved up and down with respect to the body frame 3 by operating the lever 15 to adjust the planting depth. It is like this. Reference numeral 16 is a driving handle extending upward and rearward from the rear end of the machine frame 3, 17 is a front low rear height seedling mounting base, and 18 is a seedling planting rod.

Rotating arm 20 protruding from the swing shaft 19 of the chain case 5
Is connected to the control mechanism 22 via a connecting rod 21, and the swing wheels 6 are simultaneously moved to the left and right according to the inclination of the traveling body 1.
Alternatively, the attitude is controlled by raising and lowering in opposite directions. The control mechanism 22 is configured as follows. A main valve 24 connected to an oil passage from a hydraulic pump is arranged above a transmission 23 arranged at a rear portion of the engine 2, and a cylinder rod 26 of a main cylinder 25 is linked to the main valve 24 and a cylinder rod 26 of the main cylinder 25 is rearward of the body. It expands and contracts toward. A sliding piece 27 is elastically supported at the rear end of the cylinder rod 26 via an ammunition machine 28, and a central portion of a lifter 29 composed of two plates is horizontally attached to a vertical driving shaft 27a of the sliding piece 27. It is swingably supported.

A plate body 30 is integrally fixed to the rear surface of the transmission 23, and a pair of left and right guide bars 32 are provided between the plate body 30 and a support bracket 31 erected on the body frame 3, and the guide bar 32 has a slide holder. 33 is slidably supported back and forth. The cylinder rod 34a of the sub-cylinder 34 is supported between the left and right mounting arms 33a of the slide holder 33, and the oil is supplied from the sub valve 35 provided on the rear surface of the engine 2 so that the cylinder tube 34b moves between the mounting arms 33a facing each other. Move to.

On the upper surface of the slide holder 33, a pivot arm 36 is integrally extended toward the lifter 29, and at the center of the lifter 29, an operating arm 37 is integrally projected toward the slide holder 33.
An extended end of a pivot arm 36 is swingably supported by a pin shaft 38 provided at the base end of the operating arm 37. The front end of the operating arm 37 is formed with a front and rear long hole-like interchange hole, and the cylinder tube 34b
The actuating pin 39 protruding from the hole penetrates the guide 40 in the left-right direction formed in the slide holder 33 and the interchange hole.

The connecting rods 21 are connected to the left and right sides of the lifter 29,
When the main valve 24 operates, the cylinder rod 26 expands and contracts to move the lifter 29 back and forth to vertically move the swing wheels 6, and when the sub valve 35 operates, the cylinder cylinder 34
The lifter 29 horizontally swings with the movement of b, and the swing wheels 6 are moved up and down in opposite directions.

Reference numeral 41 denotes a gravity sensor provided at the left-right center of the machine body. As shown in FIG. 3, the base end of the sensing arm 42 connected to the sub-valve 35 is attached to a bracket 43 on the machine body in a longitudinal boss portion 44. The lower end portion of the connecting arm 45 which is vertically attached to the boss portion 44 is attached via the ball joint 46 to the weight sensor 47.
Is linked to the upper end of the. The middle portion of the weight sensor 47 is pivotally supported by a pivot shaft 48 on the side of the machine body so that the weight sensor 47 swings to the left and right, the connecting arm 45 swings in the opposite direction, and the sensing arm 42 is integrated. To rotate the sub-valve 35. The weight sensor 47 has a tapered shape that expands downward, and a fitting portion 49 is formed at the lower end thereof.

A control rod 7 linked to the movement of the main float 4 is provided below the weight sensor 47. The upper end of the control rod 7 and the weight sensor 47 are connected to each other with a predetermined play interval, and in the embodiment, the weight sensor 47 is provided in the ring-shaped guide body 50 formed on the upper end of the control rod 7 with the predetermined play interval. When the main float is substantially horizontal, the weight sensor 47 is in a free state with a predetermined distance from the guide body 50. When the main float 4 tilts largely to the left and right of the machine body and the control rod 7 swings to the left and right, the guide body 50 formed at the upper end of the control rod is a weight sensor.
The weight sensor is contacted with 47 and the weight sensor is swung to operate the sub valve 35.

In the non-working state, the main float 4 is in a free state and descends by its own weight, but the taper-shaped weight sensor 47 is moved in the vertical direction in the process in which the control rod 7 is moved downward in the direction of arrow A in connection with this movement. And then guide
The weight 50 is fitted to the fitting portion 49 to fix the weight sensor 47 at the neutral position by the weight of the main float 4.

Reference numeral 51 is a front rotation stopper that restricts rotation by contacting the front side when the main float 4 rotates left and right, and 52 and 53 rotate by contacting each other when the rear side of the main float 4 rotates. Is a rear rotation stopper that regulates the.

In the above configuration, when performing the planting work, the swing wheel 6 travels on the cultivator, and the main float 4 slides along the field surface while the seedling planting rod 18 is used to plant the seedlings on the seedling mounting table 17. Scrap it and plant it on the rice field. During work, when the sensing rod (not shown) senses the vertical movement of the machine due to the unevenness of the cultivator, the main valve 24 operates and the main cylinder
The cylinder rod 26 of 25 is expanded and contracted, the lifter 29 is moved back and forth, the swing wheels 6 are simultaneously moved up and down, and the main float 4 is also swung up and down by the adjuster 9 to control the body posture.

When the rice field surface is substantially flat, the weight sensor 47 is free from the restraining member 7, so that the sub-valve 35 does not operate (Fig. 4 (a)). Further, when the machine body is tilted due to the inclination of the cultivator or the like, the positional relationship between the machine body and the weight sensor 47 is changed, and the sub-valve 35 is operated to control the machine body horizontally (FIG. 4 (b)). When the main float 4 tilts due to a change in the height of the farm field in the left-right direction of the machine body, the control rod 7 connected to the main float 4 tilts and the guide body
Since the weight sensor 47 in contact with 50 swings, the sub valve
35 operates and controls the machine body in parallel with the main float 4 (Fig. 4 (c)).

When the aircraft is lifted to the non-working state, the main float 4 in the free state is lowered by its own weight,
The control rod 7 is returned in the vertical direction and moves downward in connection with this, but when the guide rod 50 comes into contact with the weight sensor 47 when the control rod 7 moves in the vertical direction, the weight sensor 47 causes the check member 7 to move. It swings in the opposite direction once due to the inertial force of the sub valve 35
Is reversely operated to return the swing wheel 6 to a horizontal state with respect to the machine body (fourth (d)).

Next, the restraining member moves downward while guiding the weight sensor 47 in the vertical direction with respect to the machine body, and the guide body 50 moves the weight sensor.
The weight sensor 47 can be reliably fixed to the neutral position where the swing wheel 6 is horizontal by the weight of the main float 4 that is at the lower limit position because it is fitted to the fitting portion 49 of the 47 (fourth position). Figure (e)).

[Effect of device]

The invention of the present application, in the horizontal control mechanism in the paddy work machine, which changes the relative heights of the left and right wheels provided on both sides of the machine body by interlocking with a gravity sensor that is oscillated to the left and right center positions of the machine body in a swingable manner to the left and right, A long control rod is extended upward in the left and right center of the float that is provided in the lower part of the machine body so that it can be freely rolled, and the upper end of the control rod and the gravity sensor are connected with a predetermined play interval, and the field surface is left and right. When the height changes in a certain direction by more than a predetermined amount, the control rod linked to the tilt of the float swings the gravity sensor to control the aircraft's posture, so horizontal control is performed using the basic gravity sensor. However, if the height of the field surface changes significantly in the left-right direction of the machine, it will automatically switch to Tahira control by float detection, and the machine attitude will be adjusted based on the field field. It can be a paddy field work attitude.

[Brief description of drawings]

FIG. 1 is an overall side view of a paddy working machine, FIG. 2 is a perspective view of a control mechanism, FIG. 3 is a perspective view of essential parts, and FIG. 4 is an operation explanatory view of the present invention. 4 ... Float, 6 ... Swing wheel, 7 ... Control rod, 41 ... Gravity sensor

Claims (1)

(57) [Scope of utility model registration request] Claim: What is claimed is: 1. A horizontal control mechanism for a paddy work machine in which relative heights of left and right wheels provided on both sides of the machine body are changed in association with a gravity sensor that is oscillated to the left and right center positions of the machine body. , A long control rod is extended upward in the left and right center of the float provided at the lower part of the machine body so that it can be rolled freely, and the upper end of the control rod and the gravity sensor are connected with a predetermined play interval, In the case of a paddy work machine, when the height changes in the left-right direction by more than a predetermined amount, the control rod linked to the tilting of the float swings the gravity sensor to control the attitude of the machine. Horizontal control mechanism.