JPH0751862Y2 - Locking device for rolling control mechanism in paddy work machine - Google Patents

Description

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

[Problems to be Solved by Conventional Techniques and Inventions] Generally, in this type of walk-type paddy working machine, the lateral inclination (rolling) of the machine body is detected by a sensing float arranged on the left and right sides of the machine body to determine the posture of the machine body. It is controlled to be parallel to the field scene.

Conventionally, however, this sensing float is in the drooping posture state regardless of whether it is in the working traveling state or not, and therefore, in the state where the sensing control by the sensing float is not required, for example, when traveling on the road or when traveling backward, this sag There is a risk that the lower sensing float will collide with an obstacle and be damaged, and it will oscillate up and down in an unstable state with the vibration of the aircraft, which causes excessive force to sense. There is also the danger of early damage to members such as the operating mechanism.

Therefore, it is also proposed to store the sensing float upward, but in that case, in order to stop the rolling control, in addition to the sensing float storing operation, a locking operation such as a rolling operation is required. Workability is poor, and there is a risk of forgetting to operate.

[Means for Solving the Problem] The present invention has been made in view of the above circumstances and was devised with the object of providing a locking device for a rolling control mechanism in a paddy field working machine capable of eliminating these drawbacks. , A sensing float that senses the lateral inclination of the vehicle, a hydraulic valve for rolling control that is switched based on the sensing operation of the sensing float, and a hydraulic oil supply from the hydraulic valve to receive left and right rolling of the vehicle. In a paddy working machine provided with a rolling operation mechanism that operates, the sensing float is swingably displaceable from a sensing attitude for sensing the lateral inclination of the machine body to an upper storage attitude,
A rolling actuation lock mechanism for locking the left and right rolling actuations of the rolling actuation mechanism is provided, and an operating tool and a sensing float for performing the lock-lock releasing operation of the rolling actuation locking mechanism, and a sensing float at the locking position of the operating tool. It is characterized in that it is interlockingly connected via a connecting means so that the sensing float is displaced to the storage posture and the sensing float is displaced to the sensing posture at the unlocked position.

Further, according to the present invention, with this configuration, the sensing float is automatically held in the retracted state during an operation in which the sensing control of the sensing float is unnecessary.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, 1 is a traveling machine body of a walk-behind rice transplanter, and the traveling machine body 1 is a machine body frame 3 on which an engine 2 is mounted,
Seedling table 4 that reciprocates left and right, planting claws 5 that scrape the planted seedlings placed on the seedling table 4 and plant them on the rice field, center float 6 that slides on the rice field 6, running wheels 7, driving handle 8 It is the same as that of the related art in that it is configured by various members such as.

Reference numeral 9 denotes a main cylinder, and a balance arm 10 is pivotably supported at a tip portion (rear side of the machine body) of the main cylinder 9, and the connecting rods are connected to both ends of the balance arm 10, respectively. The tip end of 10a is connected to the base end of a swing case 7a on which the traveling wheels 7 are supported. Meanwhile, the balance arm
The operating rod 11a of the sub-cylinder 11 is engaged with the operating arm 10b extending forward from the steering arm 10, and the balance arm 10 moves forward and backward in parallel without swinging when the main cylinder 9 extends and contracts and the left and right traveling wheels. 7 are moved up and down at the same time, but when the sub-cylinder 11 is operated, the sub-cylinder 11 is oscillated so that the left and right traveling wheels 7 are moved upside down.

Reference numeral 12 is a sub-valve for operating the sub-cylinder 11, and the central portion of the operating arm 13 to which the valve spool 12a of the sub-valve 12 is connected to one side is supported by a support plate 14 fixed to the body frame 3 side. It is pivotally supported around 13a as a fulcrum. On the other hand, reference numeral 15 denotes a sensing float (side float) arranged vertically swingably on both front and left and right sides of the center float 6, and an upper end portion of a sensing rod 15a whose lower end is connected to the sensing float 15 has an operating arm. 13
Is connected to each end of an operating rod 13b rotatably supported about its axis via links 13c. When the sensing float 15 swings up and down at the same time, the actuation rod 13b rotates about its own axis with respect to the actuation arm 13, thereby absorbing the simultaneous swing of the sensing float 15 to actuate the actuation arm. Although the 13 does not move from the neutral state, when the sensing float 15 swings up and down in a contradictory manner, the operating arm 13 swings, which pushes and pulls the spool 12a to switch the sub-valve 12. Then, the sub-cylinder 11 is operated so that the body posture becomes parallel to the field scene, and the traveling wheels 7 are moved up and down in a contradictory manner.

Reference numeral 16 is a lock pin for restricting the swing of the balance arm 10. The lock pin 16 is supported by a bracket 16a provided on the body frame 3 side so as to be retractable. This Lockpin 1
Reference numeral 6 is interlocked with a lock operating lever 18 provided on the driving handle 8 through a wire 17, and the lock operating lever 18 is connected to the lock operating lever 18.
When the 18 is operated to the entry position, the lock pin 16
It receives the urging force of b and projects from the bracket 16a, whereby it is inserted into and engaged with the engaging hole of the plate 10c projecting from the connecting rod 10a to rock the balance arm 10. Further, an operating pin 16c is integrally projectingly provided on the lock pin 16, and one end of a connecting wire 19 is connected to the operating pin 16c. On the other hand, the other end of the connecting wire 19 is connected to a plate 13d projecting from the operating rod 13b, using the support plate 14 as an outer receiver. When the lock operating lever 18 is set to the entry position, the connecting wire 19 is pulled, whereby the actuating rod 13b is forcibly rotated to the side for moving the sensing rod 15a in the direction of arrow A upward, and the sensing float is detected. It is configured to hold 15 in its raised storage position.

In the embodiment of the present invention constructed as described above, the rolling control of the vehicle body is performed by detecting the lateral inclination of the traveling vehicle body as described above with the lock operating lever 18 set to the cut position. Sub valve based on swing
This is done by the operation of the sub-cylinder 11 based on the switching of 12, so that the seedling planting work can be performed in a posture in which the body posture is maintained parallel to the rice field.

As described above, in the embodiment of the present invention, the rolling control can be performed based on the sensing swing of the left and right sensing floats 15, but when the vehicle is not planted, such as when traveling on the road or traveling backward. In this case, the lock operation lever 18 is set to the cut position and the balance arm 10 travels in a stable state with the rocking lock, but in this case, in the embodiment, it is connected to the lock pin 16 via the connecting wire 19. The operating rod 13b automatically rotates to raise the sensing rod 15a.
Thus, the sensing float 15 is automatically set to the retracted storage position, and the sub-valve 12 is also locked when the sensing float 15 is set to the retracted position. As a result, it is possible to effectively prevent a problem that the sensing float 15 is in an unstable state in which it hangs down as in the conventional case when the vehicle is traveling on a road or the like and the sensor float 15 hits an obstacle and is damaged.
Moreover, the setting of the sensing float 15 to the storage position does not require a dedicated operation for that purpose, but to the cutting position of the lock lever 18 which is an operation necessary for stably performing non-working traveling such as road traveling. The operation is automatically performed based on the operation No., and accordingly, the number of operations is not increased and the operation is complicated, and forgetting to switch can be eliminated.

Incidentally, the connection wire 19 is returned in the planting operation state, and in this state, the slack of the connection wire 19 is set to allow the sub-valve switching based on the sensing oscillation of the sensing float 15. It is a thing.

By the way, even if an attempt is made to lock the vehicle in a state where the vehicle body is tilted to the left and right with respect to the traveling wheels 7, the locking pin 16 and the plate 10c cannot be locked because they do not coincide with each other. It is necessary to return parallel to the wheels 7. However, this parallel returning operation is troublesome, complicated, and time-consuming, since the machine must be lowered once and then shaken left and right. Therefore, as shown in FIG. 4, the operation arm 1 is supported with the support shaft 13a as a fulcrum.
At the tip of the plate 24 provided to swing integrally with 3b,
The weight 25 is integrally mounted via a mounting shaft 24a that is concentric with the support shaft 13a. And now, when the aircraft is lifted up at the uneven part of the cultivator (in this state, the aircraft is parallel to the rice field due to the rolling control),
The body is inclined with respect to the left and right traveling wheels 7. Then, when the machine body travels to reach a flat place, the traveling wheels 7 become horizontal while the machine body inclines, but at this time, the weight body 25 also inclines together with the operating arm 13 constituting the balance mechanism. Thus, the spool 12a is switched so that the valve is switched so that the attitude of the machine is returned to the horizontal state. Therefore, the machine automatically returns to the horizontal attitude, and the locking operation by the lock pin is easily performed. It will be.

In this case, however, the weight 25 may impair the sensitivity of rolling control, but the acting force of the weight 25 should be set to a value that does not cause a problem with the lifting force of the mud of the sensing float. By doing so, on the contrary, the sensing float 15 acts as a damper that buffers the unstable sensing operation due to the small unevenness of the mud, and unnecessary sensing operation is performed. There is an advantage in that it is possible to provide the effect that stable and damped sensing operation can be performed.

It should be noted that the present invention is not limited to the above-described embodiment, and the sensing float is automatically set to the storage position in connection with the operation state of the operating tool that does not require the sensing control by the sensing float. It is possible to use the lock pin as in the first embodiment.
It is not limited to the one that holds the set position in the retracted position by the rotation of the operation rod 13b linked to the lock operation of 16, but acts directly on the sensing float 15 as in the second embodiment shown in FIG. It may be. So in this one,
Similar to the previous one, connecting wire 19
Will be pulled, which will cause the operating rod 20 to be
Pin 2 provided on the operating rod 20 by being displaced rearward against 20a.
0b will force the link 21 to swing backwards. Then, linked to the rear swing of this link 21, the sensing float 15
Moves upward and is held in the stored posture.

[Advantages] In summary, since the present invention is configured as described above, when the rolling control is not required, such as when traveling on the road or when traveling in reverse, by operating the operating tool to the locking position, the rolling operation can be performed. Along with the locking of the actuating mechanism, the sensing float for left and right rolling sensing is automatically held in the retracted position.

As a result, it is possible to avoid a situation where the sensing float is in an unstable state and hangs like a conventional one, and it is possible to prevent the sensing float from being damaged by colliding with other members or sneaking into the field, The storage of the sensing float is linked to the locking operation of the rolling actuating mechanism that operates based on the left and right rolling detection of the sensing float, and the hydraulic valve for rolling control with the sensing float set to the retracted position. Is also locked. As a result, these members that control rolling control can be switched to a state in which rolling control is performed by one operation tool operation and a state in which rolling control is performed and a locked and stored non-control state, and each dedicated operation is required. It is excellent in operability and can prevent erroneous operations and forgetting operations.

[Brief description of drawings]

The drawings show an embodiment of a locking device of a rolling control mechanism in a paddy field working machine according to the present invention. Fig. 1 is a side view of a walking type rice transplanter, and Fig. 2 is a perspective view of a main part of a cylinder part. Fig. 3 is an operation explanatory view showing the relationship between the rolling lock part and the sub-valve part, Fig. 4 is a perspective view of the sub-valve part with a weight attached, and Figs. 5A and 5B are the second embodiment. FIG. 9 is an operation explanatory view showing a connection relationship between the lock portion and the sensing float portion in the example, and an operation explanatory view seen from a side surface of the sensing float portion. In the figure, 1 is a traveling machine body, 11 is a sub-cylinder, 12 is a sub-valve, 15 is a sensing float, 16 is a lock pin, and 18 is an operating lever.

Claims (1)

[Scope of utility model registration request] 1. A sensing float for sensing a left / right inclination of the fuselage, a hydraulic valve for rolling control which is switched based on a sensing operation of the sensing float, and a hydraulic fluid supplied from the hydraulic valve. In a paddy working machine provided with a rolling operation mechanism for performing left and right rolling operations of
The sensing float is swingably displaceable from a sensing posture for sensing the left / right inclination of the machine body to an upper retracted posture, while a rolling actuation lock mechanism for locking left / right rolling action of the rolling actuation mechanism is provided. Locking the mechanism-Connecting means for displacing the operating float and the sensing float for unlocking operation so that the sensing float is displaced to the storage posture at the locking position of the operating implement and the sensing float is displaced to the sensing posture at the locking release position. A locking device of a rolling control mechanism in a paddy work machine, which is interlocked and coupled via a paddle.