JP2581221Y2 - Airframe fixing device in paddy field working machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for fixing a machine body in a paddy field working machine in which the machine body attitude is horizontally controlled by a hydraulic control mechanism.

[0002]

2. Description of the Related Art In general, in a paddy working machine such as a rice transplanter or a seeder, a hydraulic control device is operated by a hydraulic valve linked to the operation of a sensor that senses the inclination of the machine body. There is an apparatus that moves up and down to horizontally control the aircraft attitude. In this type of paddy working machine, it is necessary to stop the horizontal control and fix the aircraft as necessary, such as when the aircraft circulates on a ridge or when traveling on a road. For this reason, in the past, the aircraft attitude was mechanically fixed forcibly, or the horizontal control by the hydraulic control mechanism was stopped by locking the sensor, and the aircraft attitude was fixed by using both together. It has been known.

[0003]

However, in the case of mechanically forcibly fixing the airframe, noise is generated when the pressure oil of the hydraulic control mechanism escapes from the relief valve and returns, and the entire structure has high rigidity. In the case where the hydraulic control is stopped by locking only the sensor, there is a problem that the pressure oil often leaks in the fixed state and the attitude of the body cannot be fixed in a stable manner. Further, in the case of using both of the above, the fixing operation of the fuselage becomes complicated, and in any case, the posture of the fuselage cannot be fixed smoothly and reliably. SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide an apparatus for fixing a body in a paddy field working machine that can smoothly and reliably fix the body posture by a simple operation.

[0004]

Means for Solving the Problems To solve the above-mentioned problems, a technical measure taken by the present invention is to operate a hydraulic control mechanism with a hydraulic valve linked to the operation of a sensor, and to control the body attitude by the hydraulic control mechanism. In the paddy field working machine which horizontally controls the sensor, a lock device for locking the operation of the sensor is provided, and a hydraulic circuit between the hydraulic valve and the hydraulic control mechanism is locked in conjunction with the operation lock of the sensor. A hydraulic lock portion is provided.

[0005]

According to the present invention, when the aircraft is tilted during paddy work,
A hydraulic valve linked to the operation of the sensor that detects this activates a hydraulic control mechanism to horizontally control the attitude of the aircraft. When the fuselage is fixed as required, if the operation of the sensor is locked by the lock device, the horizontal control of the attitude of the fuselage by the hydraulic control mechanism is stopped. Further, the hydraulic lock unit locks the hydraulic circuit between the hydraulic valve and the hydraulic control mechanism in conjunction with the operation lock of the sensor by the lock device. Therefore, the attitude of the body is smoothly and reliably fixed only by operating the lock device.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the accompanying drawings. Reference numeral 1 denotes a walking rice transplanter exemplified as a paddy field working machine, in which a float 4 is provided below a body frame 3 having an engine 2 mounted on a front portion thereof, and wheels 6 supported by a chain case 5 are provided on both sides thereof. It is arranged. The float 4 has a rear end mounted on the body frame 3 so as to be freely rollable, and a front side of the float 4 moves up and down to approach and separate from the body. Reference numeral 7 denotes a planting portion including a seedling mounting table 8, a planting rod 9 and the like, 10 denotes an operation handle extending upward and rearward, and 11 denotes a planting depth adjusting lever.

The wheel 6 is connected to the swing shaft 1 of the chain case 5.
2 is connected to a hydraulic control mechanism 15 via a lift rod 14. Reference numeral 16 denotes a main cylinder of the hydraulic control mechanism 15. The main cylinder 16 is provided upright at a position in front of the engine 2, and a left-right lifter balance 17 is vertically swingable at a top end thereof via a fulcrum shaft 18. The lift rods 14 are respectively connected to both ends of the lifter balance 17. Reference numeral 19 denotes a rolling sub-cylinder arranged on one side of the lower surface of the lifter balance 17.

Reference numeral 20 denotes a pendulum-type sensor disposed behind the main cylinder 16. The sensor 20 is supported by a support shaft 21 on the fuselage side so as to freely swing left and right to detect the inclination of the fuselage. It has become. 22 is the sensor 20
, A main valve 23 of the hydraulic valve unit 22 and the main cylinder 16 are connected via a hydraulic circuit 24, and a sub-valve 25 and a sub-cylinder 19 are connected to each other. Are connected via a hydraulic circuit 26. And the sensor 20
And the spool of the sub-valve 25 are interlockingly connected via an interlocking rod 27, and the sub-valve 25 operates the sub-cylinder 19 in connection with the sensor 20 that detects the inclination of the body, and the lifter swings accordingly. The balance 17 vertically moves the left and right wheels 6 in opposite directions to horizontally control the attitude of the body. On the other hand, when the float 4 moves up and down with respect to the body, the connecting rod 28 operates the main valve 23, and the main cylinder 16 moves the lifter balance 17 up and down to move the left and right axles 6 at the same time.

Reference numeral 29 denotes a lock device for locking the operation of the sensor 20. The lock device 29 is formed by a single rod 30 disposed in the front-rear direction.
A support member 31 provided on the rear side of the engine 2 and a panel 32 provided on the rear side of the engine 2 are slidably supported in the forward and backward directions. The front end of the rod 30 faces the engaging hole 33 near the support shaft 21 provided in the sensor 20, and if the gripper 34 provided at the rear end of the rod 30 is gripped and the rod 30 is pushed forward, The tip of the rod 30 is fitted into the engagement hole 33 to lock the operation of the sensor 20. The rod 30
A hydraulic lock portion 35 for locking the hydraulic circuit is integrally formed on the front end side of the hydraulic circuit. That is, 36 is the sub-valve 2
A lever for locking the hydraulic circuit 26 between the hydraulic cylinder 5 and the sub-cylinder 19, and the hydraulic lock portion 35 faces behind the lever 36. In conjunction with the locking operation of the lock device 29, first, the rod 30 locks the sensor 20, and then the hydraulic lock portion 35 comes into contact with the lever 36 to operate and lock the hydraulic circuit 26. 37 is a hydraulic pump unit, and 38 is a relief valve.

FIGS. 5 and 6 show the seedling mounting table 8 provided with an auxiliary seedling guide.
A fulcrum 39 is provided on both sides of the upper part of the frame, and a frame-shaped guide member 40 is provided on the
The supplementary seedling guide 41 is configured so as to be rotatable vertically at a position and a position B rotated upward, so that the seedling can be easily replenished. That is, when replenishing seedlings, the seedlings may not be completely loaded on the seedling mounting table 8 and there may be a surplus. Work was interrupted. In such a case, the seedling can be supported on both the front and rear sides of the guide member 40 only by moving the guide member 40 upward to the position B and hanging the upper end side of the seedling on the guide member 40 from above. Even when the planting operation is performed, the seedlings do not fall forward, the workability is improved, and the seedlings are easily supplied.

In the above arrangement, when the planting operation is performed, the wheels 6 run on the plow, the float 4 slides on the rice field, and the seedling mounting rod 9 moves the seedling on the seedling mounting table 8. And plant it on the rice field. When the aircraft tilts during operation and the sensor 20 swings with respect to the aircraft, the sub-valve 25
Actuates the sub-cylinder 19 of the hydraulic control mechanism 15, and the swinging lifter balance 17 vertically moves the left and right wheels 6 in opposite directions to horizontally control the attitude of the machine.

[0012] Then, at the time of the aircraft revolving around the ridge, or
When the body is fixed during traveling on a road or the like, if the rod 30 of the lock device 29 is pushed forward, the tip of the rod 30 fits into the engagement hole 33 and locks the sensor 20. Horizontal control is stopped. Therefore, there is no need to make the hydraulic control mechanism 15 particularly high in rigidity as in the case of mechanically forcibly fixing the hydraulic control mechanism 15, and the pressure oil does not escape from the relief valve and generate noise.
Then, after the rod 30 locks the sensor 20, the hydraulic lock portion 35 formed on the rod 30 activates the lever 36 to lock the hydraulic circuit 26, so that pressure oil does not leak and is always kept in a stable state. The aircraft attitude can be fixed. In addition, since the sensor 20 and the hydraulic circuit 26 can be locked by simply pushing in one rod 30, the attitude of the machine body can be fixed smoothly and reliably, and no erroneous operation occurs. In addition, the auxiliary seedling guide 41
In the case where the seedlings are not fully loaded on the seedling mounting table 8, the seedlings can be securely supported and the planting operation can be continued smoothly. Improvement can be achieved.

[0013]

In summary, the present invention relates to a paddy working machine in which a hydraulic control mechanism is operated by a hydraulic valve linked to the operation of a sensor, and the body attitude is horizontally controlled by the hydraulic control mechanism. A lock device for locking the operation is provided, and a hydraulic lock portion for locking the hydraulic circuit between the hydraulic valve and the hydraulic control mechanism in conjunction with the operation lock of the sensor is provided, so that the hydraulic control mechanism is horizontally controlled. When fixing the aircraft as needed,
If the operation of the sensor is locked by the lock device, the horizontal control can be smoothly stopped without mechanically fixing the hydraulic control mechanism. Therefore, it is not necessary to make the overall structure particularly rigid, and the pressure oil does not cause noise due to relief. The hydraulic lock unit locks the hydraulic circuit between the hydraulic valve and the hydraulic control mechanism in conjunction with the operation lock of the sensor.Therefore, pressure oil does not leak, and the airframe is always kept in a stable and smooth state. Can be fixed.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a paddy working machine.

FIG. 2 is a front view of a hydraulic control mechanism.

FIG. 3 is a side view of a main part.

FIG. 4 is a hydraulic system diagram.

FIG. 5 is a side view of a paddy field working machine provided with an auxiliary seedling guide.

FIG. 6 is a plan view of the same.

[Explanation of symbols]

 15 Hydraulic control mechanism 20 Sensor 22 Hydraulic valve unit 26 Hydraulic circuit 29 Lock device 35 Hydraulic lock unit

Claims (1)

(57) [Scope of request for utility model registration] In a paddy field working machine wherein a hydraulic control mechanism is operated by a hydraulic valve linked to the operation of a sensor and the body attitude is horizontally controlled by the hydraulic control mechanism, a lock device for locking the operation of the sensor is provided. An apparatus for fixing a machine body in a paddy working machine, further comprising a hydraulic lock unit that locks a hydraulic circuit between the hydraulic valve and a hydraulic control mechanism in conjunction with an operation lock of the sensor.