JPH0246241Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to an automatic groove depth adjustment device for a direct seeding machine in flooded soil, which automatically adjusts the groove depth according to the hardness of the soil in the field. This allows work to be done at the optimal seeding depth depending on the hardness.

[Conventional technology]

Direct sowing in flooded soil, in which a seeding float is equipped with a furrower and a soil covering member, a seeding furrow is formed with the furrower in the paddy field after puddling, rice seeds are directly sown into the sowing furrow, and the soil is covered with a soil covering member. There is a chance.

In this type of direct seeding machine, a technique is generally known in which the soil covering member is adjusted up and down depending on the hard soil in the field in order to promote uniform germination and grow strong rice. However, the trencher is fixed or semi-fixed, and a device that changes the depth of the trench depending on the hardness of the soil has not yet been proposed.

[Problem that the invention attempts to solve]

Conventional trenchers are in a fixed state at least during operation, so if there is a change in the hardness of the soil,
Various problems arose.

In other words, in fields with soft soil, even if a seeding groove is formed with a trencher, it tends to collapse, and the mud is washed away by water, so the actual seeding depth tends to be shallow, and floating seedlings, etc. This can lead to poor seedling establishment.

However, if the depth of furrowing is set based on the comparative areas, the seeding depth will be too large in the hard areas, resulting in poor germination and variations.

[Means for solving problems]

The present invention aims to solve these conventional problems, and as a specific means for this purpose, seeds are placed in a sowing groove 44 formed by a groove maker 21 provided on a seeding float 14 that slides in the field. sow directly,
In a direct sowing machine in flooded soil that covers soil with a soil covering member 22, the seeding float 14 is provided with the trencher 21 that can be moved up and down within the sliding width of the float 14, and the soil hardness of the field is sensed. A sensor 32 is provided within the sliding width of the seeding float 14 and behind the furrower 21, and when the soil hardness is high, the furrow depth is small, and when the soil hardness is low, the furrow depth is large. A control means 43 is provided for moving the groove cutter 21 up and down in response to the sensor 32.

[Effect]

The seeding work is carried out by sliding the seeding float 14 in the field, and at this time, the groove maker 21 forms a seeding groove 44 in the field, and after directly sowing the rice seeds therein,
The soil is covered with a soil covering member 22. The sensor 32 is always
The hardness of the soil is sensed, and if there is a change in the hardness, the control means 43 operates accordingly to control the groove cutting device 21.
respond. In other words, if the soil is soft, the groove making device 21 is lowered to adjust the groove depth to a greater extent.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiment. In FIG. 1, 1 is a machine body equipped with an engine, etc., and drive wheels 3 are provided on both left and right sides of this machine body 1 via a transmission case 2. The drive wheel 3 can be adjusted up and down by expanding and contracting a hydraulic cylinder 4. 5
is a support frame that protrudes rearward from the fuselage 1,
The rear end side is curved upward and is provided with a handle 6. 7 is a main float, which is arranged on the lower side of the fuselage 1. Reference numeral 8 denotes a transmission case, which is supported by a support shaft 9 at its lower end via a bracket 10 with respect to the support frame 5 so as to be able to swing left and right. Note that the transmission case 8 can be locked so that it cannot swing. The transmission case 8 is provided with a pair of upper and lower tool bars 11 and 12 that extend outward on the left and right, and a plurality of seeding devices 13 (for example, two on the left and right) are attached to the upper tool bar 11 at predetermined intervals on the left and right, and Bottom toolbar 12
A seeding float 14 that slides on the field is connected to each seeding device 13 so as to be vertically movable.
The seeding device 13 has a seed tank 15 for storing rice seeds and a feeding section 16 provided below the seed tank 15. The feeding section 16 is driven by a transmission mechanism in a transmission case 8 via a feeding shaft 17. The transmission mechanism of the transmission case 8 is connected to a drive shaft on the body 1 side via a universal joint shaft 18. A forked seeding chute 19 is connected to the lower side of the feeding section 16 so as to sow the fed rice seeds in two rows.

The seeding float 14 has a sled-like shape in side view with the front side curved upward, and as shown in FIGS. 2 and 3, recesses 20 that are open on the rear side are cut out on both left and right sides of the intermediate portion in the front and back direction. cage, its recess 2
A groove cutter 21 is provided at the front end of the 0, and a pair of soil covering members 22 are provided on both left and right sides of the rear side. The groove-making device 21 is a combination of two left and right groove-making plates 23, whose front ends are joined and their rear sides are separated, and each lower end of the seeding chute 19 is positioned on the rear side. There is. Each groover 21 is provided at the lower end of a guide rod 25 that is inserted into the guide tube 24 so as to be able to slide vertically, and each of the guide rods 25
The left and right sides are connected by a connecting member 26. The guide cylinder 24 is supported by a column 28 via a bracket 27, and a hydraulic cylinder 30 is attached to the column 28 via a bracket 29. The hydraulic cylinder 30 is used to move the groove cutter 21 up and down, and its piston rod 31 connects to the connecting member 26.
is connected to the center of the

32 is a sensor that detects soil hardness,
At the left and right center portions of the seeding float 14 and the groove making machine 21
It is located further back than the The sensor 32 includes a sensing member 33 that slides into contact with the field and a transducer 34 that generates an electrical signal in conjunction with the sensing member 33. The sensing member 33 is made of a bar or plate, and is connected to the seeding float 1.
It is inserted into the opening 35 of No. 4 in a downwardly downward direction, and is pivotally supported by a support shaft 36 to a bracket 37 so as to be vertically swingable. The converter 34 is composed of a volume or a switch, and is connected to the sensing member 33, and a spring 38 is interposed between the two to urge the sensing member 33 downward. Here, the groove creator 2
1 and sensor 32 are both seeding float 14
In addition, the groove creator 21 is provided in the front and the sensor 32 is provided in the rear. Note that the converter 34 is attached to a bracket 37.

FIG. 4 shows the control system, and 38 is the hydraulic cylinder 3.
A control valve 39 is a hydraulic pump.
40 is a manual switch, and 41 is a manual/automatic changeover switch. 42 is a control circuit, and the sensor 32
Alternatively, it is for giving a command to the control valve 38 in response to a signal from the manual switch 40, and is configured to give a rising command to the control valve 38 when the soil is hard, and to give a descending command when the soil is soft. ing. Note that a control means 43 is constituted by a control circuit 42, a control valve 38, a hydraulic cylinder 30, and the like.

In the above configuration, when direct sowing is carried out by flooding in a paddy field, the machine body 1 is driven by the drive wheels 3 and the sowing float 14 is slid along the field surface. That is, as the seeding float 14 slides on the surface of the field, the groove maker 21 forms the seeding grooves 44 on the field. On the other hand, since the feeding unit 16 of the seeding device 13 sequentially feeds out the rice seeds from the seed tank 15, the rice seeds fall through the seeding chute 19 into the seeding groove 44 and are sown. After sowing, the left and right soil covering members 22 approach the seeding groove 44 from both sides and cover it with soil.

During such seeding work, the sensing member 33
8, the sensing member 33 moves while being inserted into the soil of the field, and if the soil has a predetermined hardness, the sensing member 33 maintains a substantially constant position in balance with the spring pressure. If there is a locally weak part in the field, the sensing member 33 is pushed down, and the converter 34 senses this movement as an electrical signal, which is sent to the control circuit 42 via the changeover switch 41.
sends an electrical signal depending on the hardness. Control circuit 42
obtains a predetermined command signal from the electrical signal and drives the control valve 38 in the downward direction. Therefore, the hydraulic cylinder 30 operates in the downward direction, and the trencher 21 descends to a position corresponding to the hardness of the soil, increasing the trenching depth, so that even if the soil is soft, seeds can be sown at a predetermined depth. On the other hand, in a hard part, the sensing member 33 moves upward, so the groove making tool 21 rises according to the hardness of the part, and the groove making depth becomes smaller. During the work, the sensing member 33 of the sensor 32 constantly moves up and down depending on the change in the hardness of the soil, and automatically moves the groove cutter 21.
Since it moves up and down, it is possible to work at the optimal seeding depth for the soil conditions in the field. During the above-mentioned work, the trencher 21 and sensor 32 are within the sliding width of the seeding float 14, and the sensor 32 is provided behind the trencher 21, so the sensor 32 detects soil hardness and softness in the sliding part. As a result, detection accuracy is good, and there is little risk of malfunctions caused by straw waste mixed in the field.

In addition, in the above embodiment, the groove making device 21 was provided so as to be vertically movable in a straight line using the guide tube 24, the guide rod 25, etc., but the present invention is not limited to this.
For example, as shown in FIG. 5, the groove creator 21 may be attached to an arm 46 that is movable up and down about a support shaft 45, and a hydraulic cylinder 48 may be interposed between this arm 46 and a bracket 47.

Furthermore, although the embodiment uses electrical means,
In addition, the sensing member 33 of the sensor 32 and the groove creator 2
1 may be interlocked with each other via mechanical means such as a link mechanism.

[Effect of idea]

According to the present invention, the trencher 21 is provided to be movable up and down, and a sensor 32 is provided to detect the hardness of the soil in the field. In response to the sensor 32, the groover 21 is activated so that the groove depth is increased.
Since a control means 43 is provided to move the soil up and down, the trench depth can be automatically adjusted according to the hardness of the soil in the field, and the seeding can be reliably sown at the optimal seeding depth for the hardness. . In addition, the groove creator 21
Since both the sensor 32 and the seeding float 14 are provided within the sliding width of the seeding float 14, grooves are formed in the area where the float 14 slides, and soil hardness and softness are detected in the area where the float 14 slides. There is little risk of causing

Furthermore, since the sensor 32 is installed behind the trencher 21, the trencher 21 can remove straw waste, and the float 14 can detect the hardness and softness of the buried soil, preventing sensor 32 from malfunctioning. You can reduce it more and more. Therefore, uniform germination can be promoted and lodging after earing can be prevented. In addition, there is no need to worry about adjusting the trench cutter according to the hardness of the soil.
It is extremely convenient to handle.

[Brief explanation of the drawing]

FIG. 1 is a cutaway side view showing an embodiment of the present invention;
2 is a plan view of the main parts, FIG. 3 is a rear view, FIG. 4 is a block diagram of the control system, and FIG. 5 is a cutaway side view showing another embodiment. 1... Aircraft, 13... Seeding device, 14... Seeding float, 21... Grooving device, 22... Soil covering member,
30...Hydraulic cylinder, 32...Sensor, 42
...Control circuit, 43...Control means.

Claims (1)

[Scope of Claim for Utility Model Registration] A direct sowing machine in flooded soil that directly sows rice seeds into a sowing groove 44 formed by a groove maker 21 provided on a sowing float 14 that slides in a field and covers the soil with a soil covering member 22, The sowing float 14 is provided with the trencher 21 movable up and down within the sliding width of the float 14, and a sensor 32 for sensing the soil hardness of the field is installed within the sliding width of the seeding float 14 and the trencher 21 is movable up and down. The groove cutter 21 is moved up and down in response to the sensor 32 so that when the soil hardness is high, the groove depth is small and when the soil hardness is low, the groove depth is large. An automatic groove depth adjustment device for a direct sowing machine in flooded soil, characterized in that it is provided with a control means 43 for operating the groove.