JPH06245613A - Working machine for rice paddy - Google Patents

Abstract

PURPOSE:To remove the error caused by the difference of plunge depth by plunging a sensor at a constant depth where the sensor is inclined by the resistance which its lowermost end meets with and causes the difference in its inclining angle according to the hardness of the mud, when the lowest end of the sensor plunges into the mud and runs forward. CONSTITUTION:The working machine is equipped with 3 or more floats 10 in a traverse line below the frame 8 and provided with a sensor 22 which detects the mud condition by the incline angle changing as the rear plunges into mud and runs forward, and the sensor 22 is set to the inside float at its head so that it may swing around the horizontal shaft 15 and the tail of the sensor 22 is positioned before the tail of float 10b and plunges into mud after the inside float a slides over the mud.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in paddy working machines such as seedling planters and seeders.

[0002]

2. Description of the Related Art A paddy field working machine of this type is constructed by mounting a working device such as a seedling planting device on a traveling vehicle body having wheels that rotate on a cultivator in a paddy field. And if there is a change in the depth of the cultivator, the planting depth of the seedlings will change, so
In order to remove this, a float or other sensor is installed under the work equipment, and the work equipment and wheels are moved up and down due to the difference in pressure received from the mud surface and the height difference between this and the mud surface. , The planting depth of seedlings is kept constant. A sensor for detecting the hardness of the mud is provided, and the movement states of the working device and the wheels are automatically adjusted according to the situation.

[0003]

A sensor for detecting the hardness of mud is arranged beside or in front of a float sliding on a mud surface, as disclosed in Japanese Patent Laid-Open No. 57-78005. ing. Here, this sensor changes its inclination angle depending on the magnitude of the resistance acting on the lower end, and detects this as hardness and softness. Therefore, the difference in the amount of plunge into the mud at the lower end of this sensor gives a large error in detecting the difference in hardness and softness. That is, in the conventional device, the mud surface is arranged at a position where it is not floated so that there is a possibility that unevenness on the mud surface may cause a large error in detecting hardness.

[0004]

In order to solve the above problems, the present invention is provided with three or more floats 10 arranged below a working machine frame 8 and sliding on a mud surface side by side.
The sensor 22 is provided with a sensor 22 for detecting the condition of the mud surface at an angle of inclination which changes when the rear part rushes into the mud and moves forward.
The rear end of this sensor 22 is located forward of the rear end of the lateral float 10b, and the inner float 10a plunges into the mud slid. The paddy working machine is characterized by being arranged as follows.

[0005]

When the paddy field machine constructed as described above is advanced in the paddy field, three or more floats arranged side by side slide on the mud surface of the paddy field to level the ground evenly. And
The rear part of the sensor plunges into the mud where the inner float is leveled and moves forward, and if this mud is hard, the rear part will float up and the inclination of the sensor will become looser and smaller, on the contrary,
If the mud is soft, the sensor rotates in the upright direction and its inclination increases.

As is well known, in a paddy working machine, a working body equipped with wheels is mounted on a traveling vehicle body having wheels that rotate on a cultivator in a paddy field, and a working device equipped with a float moves up and down by a hydraulic system or the like. It is attached to the, and the distance between the working device and the mud surface is detected by moving the float up and down, and when the distance exceeds the set range,
The working device moves up and down, and the distance is kept within a certain range. If the mud is hard, the float floats up, and if it is soft, the float sinks down, causing an error in the detected value of the above distance, and the above sensor corrects this. Or adjust the vertical movement speed.

[0007]

[Effect] As described above, according to the present invention, the sensor for detecting the hardness of the mud is swingably attached to the float so that the rear part of the sensor projects into the mud where the float is leveled. Since the muddy soil is unevenly arranged, it is detected after leveling the uneven mud, and the detection error caused by the unevenness of the mud is removed.

Further, since the rear end of the sense is arranged in front of the rear end of the lateral float, the sensor is protected by the lateral float and there is no risk of damage.

[0009]

Embodiments of the present invention will be described below. Figure 1
As described above, the seedling planting device 2 is mounted on the link 3 after the traveling vehicle body 1 to form a seedling planting machine. The traveling vehicle body 1 is provided with wheels 4 which are driven by an engine (not shown) to rotate on a cultivator in a paddy field and to be moved forward. Cylinder 5
Is attached to the rear part of the traveling vehicle body 1, and the piston rod 6
Is extended obliquely upward and its rear end is connected to the intermediate portion of the link 3, and the supply and discharge of oil discharged from the pump 7 (FIG. 4) causes the link 3 to swing around the front end, The seedling planting device 2 is designed to move up and down.

The seedling planting device 2 includes a gear box 8 which is attached to the rear end of the link 3 and serves as a working machine frame, and a seedling table 9 which is provided with its upper end tilted forward and reciprocally driven left and right. , The float 10 arranged below it, which slides on the mud surface, and the seedling taken out from the seedling, which swirls through the lower end of the seedling stand 9, are flown.
The toe 10 is composed of a seedling planting rod 11 to be transplanted on a mud surface.

A pair of left and right transmission casings 12 extend rearward from the gear box 8, and rotating casings 13 are attached to both sides of the rear ends of the gear casings 8. 1
It is provided on the outside of No. 3 and is a four-row planting device. Therefore, the center of the seedling placing table 9 is divided by the front-rear wall so that four mat seedlings can be placed side by side.

The float 10 includes a central float 10a,
It is composed of left and right side floats 10b and 10b (FIG. 2). Arm 14 that can swing around the front end
Extends from the transmission case 12 and the gear box 8 obliquely downward and downward, the above-mentioned floats 10a and 10b are attached to the rear ends thereof, and the front ends thereof are made to swing around the attachment shafts 15.

As shown in FIG. 2, the central float 10a is formed in a T-shape when viewed from above, and both sides of the front part are arranged in front of a pair of seedling planting rods 11 in the center part. The mud surface for planting is planted in advance. Side float 1
0b is formed in a U shape when viewed from above, and the left and right seedling planting rods 1
1 is located in each U-shaped groove. The rear end of the central float 10a is located in front of the rear end of the side float 10b.

As shown in FIG. 3, a support rod 16 extends forward from the gear box 8 and a valve box 17 is attached to the protruding end thereof. A support plate 18 is fixed to the front part of the central float 10a, and a valve rod 19 extending upward from the support plate 18 is inserted into the valve box 17 to form a control valve 20. As shown in FIG. 4, the control valve 20 has a central float 10
When the tip of a is at an appropriate height, the oil discharged by the pump 7 is returned to the tank 21. The tip of the central float 10a rises (the wheel 4 comes to a deep place in the tiller)
Then, the valve rod 19 is pushed up and moved to the right in FIG. 4, a part of the oil discharged by the pump 7 is supplied to the cylinder 5, and the seedling planting device 2 is pushed up. When the tip of the center float 10b goes down (the wheel 4 comes to a shallow place on the tiller), the valve rod 19 is pulled down and moves to the left in FIG. 4, the oil in the cylinder 5 returns to the tank 21, The planting device 2 is kept at a constant height above the mud surface. When the front end of the central float 10a or the valve rod 19 is forcibly pulled up by a wire (not shown) or the like, the valve rod 19 moves largely to the right in FIG. The whole amount is sent to the cylinder 5, so that the seedling planting device 2 can be raised quickly.

As shown in FIGS. 2 and 3, the front portion of the sensor 22 is rotatably attached to the rear portion of the central float 10a by the attachment shaft 15, and the rear portion thereof is located behind the central float 10a in the mud. It is arranged to rush into. This sensor 22
The rear end is located in front of the rear end of the side float 10b. Both ends of the V-shaped waist-folding link 23 have support rods 1
6 and a front portion of the support plate 18. Arm 24
The center of the spring 25 is rotatably attached to the rear part of the support plate 18, and both ends of the spring 25 are hung between the upper part and the middle of the waist folding link 23. The lower part of the arm 24 and the sensor-2
The front upper part of 2 is connected by a rod 26.

Therefore, if the mud on which the center float 10a is sliding is hard, the sensor 22 rotates counterclockwise around the mounting shaft 15 and the rod 26 pushes the arm 24 clockwise. Turning, the spring 25 is pulled and the central float 10
The tip of a is pushed down. That is, if the mud is hard, the front part of the central float 10a gliding on the mud floats up, and the spring 25 acts strongly at this time.
Push this down. On the contrary, the central float 10a
When the mud on which the slab is sliding is soft, the sensor 22 rotates clockwise around the mounting shaft 15, the rod 26 pulls the arm 24 in the counterclockwise direction, and the spring 25 loosens and the center float is released. The force of pushing down the tip of 10a becomes weak, and the tip of the central float 10a easily rises. That is, when the mud is soft, the central float 10a gliding on it is
The front part of the sank is sunk, but at this time, the spring 25 is weakened so that the spring 25 can be easily lifted up, and it corresponds to the hardness of the mud.

The spring 25 shown in FIG.
0a, but like spring 27 in FIG.
It is also possible to act on the valve rod 19 to adjust its movement resistance. As shown in FIG. 5, FIG. 6 and FIG. 7, it is possible to provide a plurality of portions 22a of the sensor 22 which penetrate into the mud.
With this configuration, the condition of mud is detected by the average value of the detection points, and the accuracy is further improved.

8 and 9 mainly detect the amount of water on the mud surface. That is, the central float 1
The water guide groove 28 is provided in the center of the lower surface of 0a, the sensor 22 is a float type, and the sensor 22 is operated by the amount of water discharged from the water guide groove 28 and its flow velocity (vehicle speed of the seedling planter). It is provided to let you.

[Brief description of drawings]

FIG. 1 is a side view of a rear portion of a seedling planting machine according to the present invention.

FIG. 2 is an enlarged plan view of a part thereof.

FIG. 3 is a cut side view of a part thereof.

FIG. 4 is a layout view of the hydraulic system.

FIG. 5 is a partial plan view showing the modification.

FIG. 6 is a cut side view thereof.

FIG. 7 is a rear view thereof.

FIG. 8 is a partial plan view showing the modification.

FIG. 9 is a cut side view thereof.

[Explanation of symbols]

 8 Working Machine Frame (Gearbox) 10 Float 10a Inner Float (Center Float) 10b Horizontal Float (Side Float) 15 Horizontal Axis (Mounting Axis) 22 Sensor

Claims (1)

[Claims] 1. A tilt angle that changes when three or more floats 10 that are arranged below a working machine frame 8 and slide on a mud surface are provided side by side and a rear part of the float 10 projects into the mud and advances. Is equipped with a sensor 22 for detecting the condition of the mud surface. The front part of the sensor 22 is attached to the inner float 10a so as to swing around the horizontal axis 15. The rear part of the sensor 22 has a rear end. A paddy working machine, which is located in front of the rear end of the lateral float 10b and is arranged so that the inner float 10a plunges into the slid mud.