JPH08331914A - Machine for direct sowing in flood paddy field - Google Patents

Abstract

PURPOSE: To provide a machine for the direct sowing in a flood paddy field capable of keeping the position of a float of each direct sowing apparatus at the optimum level using an extremely simplified structure. CONSTITUTION: A mobile machine body is provided with a plurality of direct sowing apparatuses 11 parallelly placed at the right and left sides of the body and each composed of a vertically movable float having a furrow opener 18, a sowing means 19 to put seeds in the furrow formed on a field by the furrow opener 18 and a soil-covering means to cover the seeds in the furrow with soil. The plural direct sowing apparatuses 11 are divided into plural blocks. Each block is provided with a grounding member 45 running on the ground to give a setting standard for the direct sowing apparatus 11, a 1st means to detect the vertical position of the grounding member 45 relatively to the float 19 and a 2nd detection means thrust into the soil to detect the hardness of the soil. The float 19 of each block is independently lifted or lowered relatively to the mobile machine body based on the detection results of the 1st detection means and the 2nd detection means to keep the depth of the furrow formed by the furrow opener 18 at a prescribed depth.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a float which has a grooving device and is configured to be movable up and down, and a sowing means for sowing seeds in a groove formed in a field by the grooving device.
The present invention relates to a submerged direct seeding machine comprising a plurality of direct seeding devices, which are arranged side by side on the left and right, and each of which comprises a soil covering means for covering the seeds of the groove with soil.

[0002]

2. Description of the Related Art Conventionally, in this type of submerged direct seeder,
As disclosed in Japanese Examined Patent Publication No. 6-79522, a plurality of inundation direct seeding devices arranged side by side on the left and right sides are entirely configured to be moved up and down.

[0003]

However, in the above-mentioned conventional apparatus, the floats of all flooded direct seeding devices are integrated based on the detection results of the hardness of the soil and the position of the field scene detected only at a certain position. Since it is operated to move up and down, it is possible to properly maintain the position setting of the float of the submerged direct seeding device near the soil hardness detection position and the ground surface position detection position, that is, the groove depth formed by the grooving device. The position setting was not accurately reflected in the float of the submerged direct seeding device at a position relatively distant from the detection position. That is, even in the same field, there are differences in the unevenness of the mud surface and the hardness of the soil, and the elevation control is performed without being based on the mud surface position or the soil hardness at or near the actual trench to be grooved. In the float of the water direct seeding device, there is a high possibility that the depth of the groove formed by the grooving device will not be appropriate.

The present invention has been made in view of the above circumstances, and it is possible to properly maintain the position of the float in each submerged direct seeding device and to make the structure for doing so as simple as possible. The purpose is to provide a machine.

[0005]

In order to achieve the above-mentioned object, a submerged direct seeding machine according to the present invention comprises a float having a grooving device and a vertically movable structure in a moving body, and the grooving device. A plurality of direct sowing devices configured by sowing means for sowing seeds in a groove formed in the field and soil covering means for covering the seeds in the groove are provided side by side, and a plurality of the direct sowing devices are provided. And a grounding body that runs on the ground surface that serves as a setting reference for the direct seeding device, a first detection unit that detects the vertical position of the grounding body with respect to the float, and A second detecting means for detecting whether the soil is hard or soft, and based on the detection results of the first detecting means and the second detecting means, the depth of the groove formed by the grooving device is predetermined. As to the depth, to the mobile body Wherein configuration in that for each block the are float independently configured to freely lift operation. The operation and effect of this characteristic configuration are as follows.

[0006]

That is, a plurality of direct seeding devices arranged side by side on the left and right are divided into a plurality of blocks, and each block is provided with a first detection means and a second detection means, and the detection results of the detection means are obtained. Since the float is independently configured to be vertically movable based on this, the depth of the groove formed by the groove groover of the float that is vertically moved is set accurately for each block. The float is positioned so as to have a predetermined groove depth even if the field has some irregularities or the soil is uneven in hardness or softness. Also, a single direct seeding device may be associated with each block, and first detecting means and second detecting means may be provided for each direct seeding device, and the float may be independently moved up and down based on the detection result. However, in contrast to the above-mentioned one, in a case where a plurality of direct seeding devices close to each other are associated with each block,
It is possible to reduce the number of installed first detecting means and second detecting means and the number of installed controlling means and the like.

[0007]

Therefore, even if the field is not even, or even if the soil is uneven in hardness and softness, the operation of raising and lowering the float provided with the grooving device for grooving for sowing can be performed in each block. Since it is performed based on the detection results of the first detecting means and the second detecting means, the depth of the groove formed by the grooving device of each float is maintained at an appropriate depth as a whole, which is excellent. Sowing work can be performed, and the emergence and growth are good as a whole, making it easier to manage. Further, although it may be possible to perform the lifting operation of the float based on the detection results of the first detection means and the second detection means for each direct seeding device, instead of making each block correspond to a single direct seeding device, If a group of direct seeding devices adjacent to each other is made to correspond to each block, it is possible to reduce the number of installed first detection means, second detection means, control means, etc., so that the cost is low. You can also get

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of the rear part of the riding type submerged direct seeding machine. This flooded direct seeder has a structure using a rice transplanter, and is a mobile body supported by a pair of left and right front wheels (not shown) and a pair of left and right rear wheels (not shown) (Fig. (Not shown) is equipped with a driving part (not shown), a control part, etc., and at the rear end of the mobile body, a seedling stand 2, a center float 3, a pair of left and right sides are provided via an elevating link mechanism 1. The floats 4 and 4, the seedling planting mechanism 5, the submerged direct seeding mechanism 6 and the like are provided.

In the figure, reference numeral 7 denotes a drive case for driving the seedling planting mechanism 5 by transmitting power from the engine of the driving part. Reference numeral 8 denotes a support frame made of a round pipe member, which is attached to the rear portion of the drive case 7 across a work advancing direction via a bracket (not shown), and is attached to the support frame 8 via a stay (not shown). Each tank device 9 constituting the flooded direct seeding mechanism 6 is mounted. still,
The support frame 8 is provided with a plurality of mounting flanges 10 to which the flooded direct seeding mechanism 6 is detachably attached at intervals in the lateral direction. The submerged direct seeding mechanism 6 is configured as a unit of the direct seeding device 11 for each direct seeding row, and each direct seeding device 11 is pivotally supported by a mounting bracket 12 and pins 13 and 14 on the mounting bracket 12 so as to be vertically movable. Parallel link mechanism 1 including an upper link 15 and a lower link 16
7, a float 19 having a grooving device 18 on the bottom surface, and a soil covering tool 21 as soil covering means, one end of which is vertically rotatably supported by a strut 20 standing upright from the float 19, and an upper portion of the strut 20. The rear end of the parallel link mechanism 17 is pivotally supported on the side via pins 22 and 23. Further, a lower seeding chute 24 made of a transparent hard resin as a seeding means is attached to the mounting bracket 12 by a pin 25 in an inclined rearward downward direction, and a discharge opening of the chute 24 is provided with an openable shutter (not shown). It is bent downward in the vertical direction and faces the upper side of a U-shaped guide plate 26 in a plan view which is erected from the float 19. The mounting bracket 12 is the support frame 8
By being fitted to the respective mounting flanges 10 of No. 1 and attached by the two removable mounting pins 27 shown in FIG. 2, each direct seeding device 11 is, as shown in FIGS. 1 and 3, a center float of the rice transplanter. In the present embodiment, a total of 6 pieces are arranged at equal intervals in the lateral direction on the left and right sides of 3 and on the left and right sides of the side floats 4, 4 of the rice transplanter. The float 19 of each direct seeding device 11 includes a pin 14 and a pin 22 of the parallel link mechanism 17.
Is urged in the direction toward the ground by tensioning a coil spring over and the soil cover 21 comprises a mounting rod 28 and a pair of left and right soil cover plates 29 fixed to the mounting rod 28. A spiral spring 30 is provided at a portion that is pivotally supported so that it can move up and down, and urges it toward the ground. Here, in this embodiment, the groove making device 18 of the float 19 is used.
Form 6 grooves in the soil with streaks, seed seeds (coating fir) in each groove, and cover the seeds with a soil cover plate 2
It is supposed that the soil will be covered from the left and right by 9, 29.
In FIG. 2, reference numeral 31 denotes a soil-covering stopper, which is configured by a bar member laterally protruding from the mounting bar 28 contacting the rear surface side of the guide plate 26.

Further, in each direct seeding device 11, the float 19 is provided by the cord body 32, and the soil cover 21 is provided by the cord body 33.
Are connected to the elevating arm 34 via pulleys 35 and 36, respectively. In addition, as shown in FIGS. 1 and 5 to 7, an interlocking rod 37 is installed on a support plate 8A protruding from the support frame 8 in parallel with the support frame 8 and rotatable about its axis. The interlocking rods 37 are divided into three parts on the coaxial core, corresponding to three sets of the direct seeding devices 11 arranged side by side on the right and left side by side, with one pair adjacent to each other as a pair. Is supported by each support plate 8A. The elevating arms 34 of the pair of right and left direct seeding devices 11 and 11 are projected to the interlocking rods 37 in a rearward descending manner, and the elevating arms 34, the float 19 and the soil cover 21 are connected by the cord bodies 32 and 33. ing. That is, as shown in FIGS. 5 to 7, the pulley 35 has two pulleys 35A and 35B, is rotatably mounted on the pin 13 of the parallel link mechanism 17, and the pulley 36 is rotatably mounted on the pin 23. ing.
The float cord body 32 is a wire having a spring portion 32A, and one end of the float cord body 32 is locked to the column 20 so that the pulley 3
5A, and the other end is attached to one lower end of a bifurcated metal fitting 38 provided at the tip of the elevating arm 34. The cord 33 for the soil covering tool is a wire having a spring portion 33A, one end of which is connected to the mounting rod 28 and is wound around the pulley 35B and the pulley 36, and the other end of which is attached to the other lower end of the bifurcated metal fitting 38. It is installed. As shown in FIGS. 5 to 7, since the pair of right and left direct seeding devices 11, 11 divided into each set (block) as described above are integrally lifted, the elevating arms of the respective direct seeding devices 11, 11 are lifted. The tip end portions of 34 and 34 are connected to each other by a bridge connecting fitting 39. Further, as shown in FIGS. 4 (a) and 4 (b), the bridge connecting fittings 39 of each set of the direct seeding devices 11 and 11 on both the left and right sides and the center are provided with rod supporting portions 40 and 4 protruding from the center thereof.
0 and 40 are erected and connected by a single rod 42 that is pivotally attached to a pin 41 so as to be swingable around the longitudinal axis. Then, rod supporting portions 40, 40, 4 pivotally attached to the rod 42.
It is set so that the right and left intervals between the adjacent 0s are equal.

As shown in FIGS. 2 and 5 to 7, three pairs of right and left direct seeding devices 11, 11 arranged in parallel on the left and right are provided from the support frame 8 at positions corresponding to each set.
A mounting arm 43 such as an actuator is projected in a posture inclined downward and forward. However, in this embodiment,
A pair of left and right center direct seeding devices 11, mounting arms 43 of the 11
In addition, the actuator 44 including an electric motor described later is not provided, and the grounding body 45 and the like described later are not provided. 2 and 5 to 7 on the protruding end side of the mounting arm 43 in the set of the direct seeding devices 11 on both the left and right sides.
A horizontal shaft 46 is attached to the horizontal shaft 46, and an arm 47 for a roller-shaped grounding body 44 running on the ground surface is attached to the horizontal shaft 46.
In this embodiment, an arm 49 for a detection body 48, which is a circular disk in the present embodiment for detecting the hardness and softness of soil by entering the soil, is provided so as to be vertically swingable about the horizontal shaft 46. Further, the grounding body 45 and the detection body 48 are adapted to follow even if there is ups and downs in the field.

Mounting bosses 47A, 4 for the arms 47, 49
9A is rotatably supported by being fitted on the horizontal shaft 46, and each arm 47, 49 is extended downward as shown in FIG. 2, and is grounded to each boss 47B, 49B at the extended end. Both the body 45 and the detection body 48 are rotatably supported via a lateral support shaft. Reference numeral 50 denotes a first angle sensor composed of a potentiometer, and as shown in FIG.
The relative angular displacement between the sensor 5 and the detector 48 is detected. That is, the sensor attachment plate 51 is fixed to the attachment boss 49A, the first angle sensor 50 is attached to the attachment plate 51, and the interlocking arm 53 having the roll 52 is fitted and fixed to the shaft 50A of the first angle sensor 50. The interlocking arm 5
3, a coil spring 55 is stretched over the arm 54 protruding from the boss 47A, and urges the interlocking arm 53 in the clockwise direction in FIG. Here, the first angle sensor 50
Serves as both the first detecting means S1 and the second detecting means S2. On the other hand, the interlocking arm 47C is fitted and fixed to the boss 47A, and the roll 52 is in contact with the lower surface edge of the interlocking arm 47C via the elastic pulling of the spring 55. Reference numeral 56 denotes a grounding body lowering mechanism, and as shown in FIG. 2, a rod having a guide plate 58 fixed to an actuator mounting plate 57 and a large number of adjusting holes inserted through the guide plate 58 so as to be vertically movable. 59, and coil springs 60, 61 which are arranged above and below the guide plate 58 by being wound around the rod 59.
And a spring holding pin or the like that can be inserted into and removed from the adjustment hole. The lower end of the rod 59 is pivotally supported on the upper surface of the arm 47. Although not described in detail, the detecting body 48 is also provided with a lowering mechanism 62.

Here, in the left and right sides of the three sets of the direct sowing devices 11 and 11 which are paired left and right, the grounding body 45 is pushed up onto the rod 59 inserted through the guide plate 58. The coil spring 60 and the pressing coil spring 61 are arranged above and below the guide plate 58, and the spring pressure is adjusted by the position of the pin that regulates the spring so that the coil travels on the ground surface that serves as a setting reference. That is, when the soil is hard, the biasing force of the pushing-up coil spring 60 is balanced by the pushing-down coil spring 61, while the detection body 51 is exclusively biased by the biasing force of the coil spring 63 of the down-draft mechanism 62 into the soil. Since the approach amount is small when the soil is hard and the approach amount is large when the soil is soft, the first angular sensor 50 detects the relative angular displacement here. The pair of left and right mounting plates 57 are erected upright by the mounting arm 43 so as to project upward, and the actuator 4 shown by a telescopic cylinder is mounted on the pair of left and right mounting plates 57.
4 is attached, and the actuator 44 is provided with a screw on the output side of the planetary reduction mechanism that is started and stopped by an electric motor.
Piston rod 6 that is equipped with a piston part that can be rotated forward and backward through a nut, etc.
It is equipped with 4. An end portion of the piston rod 64 is pivotally supported by a connecting fitting 65 fixedly fitted to each interlocking rod 37 via a pin 66. Therefore, in FIG. 2, when the actuator 44 extends, the interlocking rod 37 is swung in the clockwise direction in FIG. 2 via the connecting fitting 65, whereby the elevating arms 34 in the direct seeding devices 11 and 11 of each set. , 34 are swung in the same direction, and the actuator 4
When 4 is contracted, the raising / lowering arm 34 is swung counterclockwise in FIG. 2, whereby each set of the direct seeding device 1
Elevating arms 34 and 34 are swung in the same direction in Nos. 1 and 11. 67 is a second angle sensor composed of a potentiometer, which is an arm 8A protruding from the support frame 8.
It is detachably fixed to. The sensor shaft 67A of the second angle sensor 67 is located on the axis of the interlocking rod 37, and an interlocking roller 69 is provided on an arm 68 fitted and fixed to the sensor shaft 67A.
On the other hand, a coil spring 71 is stretched between the arm 70 protruding from the support frame 8 and the tip of the arm 68 so that the interlocking roller 69 moves up and down.
Is urged in the contact direction to the second angle sensor 6
7 is configured to be able to detect the angle of the elevating arm 38.
Therefore, the detection signal of the relative angular displacement between the grounding body 45 and the detection body 48 by the first angle sensor 50, and the second angle sensor 6
The actuator 44 is expanded and contracted by comparing with the signal of No. 7.

The control circuit for each actuator 44 is shown in FIG. The detection signals of the first angle sensor 50 (S1, S2) and the second angle sensor 67 are input to the control device 72, and the drive signal to each actuator 44 is output from the control device 72.

Referring to FIG. 1, the seed feeding roll 73 and the fertilizer feeding roll 74 in the tank device 9 are driven in conjunction with the planting movement of the seedling planting mechanism 7, and in conjunction with this drive, The seed sowing shutter (not shown) for seeding the lower sowing chute 24 is opened and closed. FIG.
At the crankshaft 7 by power transmission from the drive case 7.
5 is rotationally driven, and the crankshaft 75 pivotally drives the planting arm 76 and the swing arm 77. The swing arm 77 is swung in the front-rear direction, and the swing driving force is transmitted to the interlocking rod 80 by the roller 79 provided at the end of the arm 78, and the interlocking rod 80 is used to transmit the swinging force. The shutter is opened and closed. The swing arm 77 has a pair of interlocking rods 81, 8 for driving the roll.
Each lower end of 1 is pivotally connected. The tank 82 of the tank device 9 is divided into front and rear storage parts by a partition plate 83, the front storage part 82F stores the granular fertilizer P, and the rear storage part 82R stores the coated seed T. . The fertilizer feeding roll 73 and the seed feeding roll 74 are fitted and fixed on the common roll shaft 85 at the lower part of each of the accommodating portions 82F and 82R.
Has a feeding groove at a radial position on its outer circumference and is rotatably constituted by a feeding mechanism (not shown) which is rotationally driven by the interlocking rods 81, 81.

The fertilizer P in the front accommodating portion 82F is scraped off by the groove of the roll 74, and through the discharge chute 84 which is inclined downward to the front, the left and right sides of the center float 3 of the rice transplanter,
And, it is designed so as to fall on both left and right sides of the side float 4 (see FIG. 1). Also, the seed T of the rear housing portion 82R
Is scraped off by the groove of the roll 73 and spotted through the discharging chute 84 and the seeding lower chute 24 which are inclined rearward and downward. Here, the rear housing portion 82
F, the seed feeding roll 73, the discharge chute 84, and the sowing lower chute 24 constitute the sowing means H.

With the above configuration, the interlocking rods 3 on both the left and right sides
A pair of left and right direct seeding devices 1 provided on the Nos. 7 and 37, respectively
Based on the detection result of the first angle sensor 50 based on the mud surface position where 1 and 11 are detected by the grounding body 45 and the hardness of the mud detected by the detection body 48, and the comparison result with the second angle sensor 67. The actuator 44 is actuated to move the elevating arm 34 up and down, so that the grooving depth of the grooving device 18 is set to a predetermined proper value. Then, the pair of right and left direct seeding devices 11, 11 provided on the center interlocking rod 37 are connected to the left and right interlocking rods 37, 37.
And an elevating arm 34 that is moved up and down by a rod 42 that is laid across the center interlocking rod 37 on the left and right.
Will be lifted and lowered. That is, the pair of right and left direct seeding devices 11 and 11 in the center include a rod support portion 40 of a central bridge connecting fitting 39 that supports a linear rod 42 and a rod supporting portion of the left and right bridge connecting fittings 39 and 39. Since the erection length of the part 40 is set to be equal, as shown in FIG. 4B, the height is set to a position where the vertical heights of the pair of left and right direct seeding devices 11, 11 are averaged. Will be done. That is, as shown in FIG. 4 (b), a pair of left and right direct seeding devices 11 and 11 at the left end and a pair of left and right direct seeding devices 11 and 11 at the right end have an intermediate height in the vertical direction. The pair of left and right center direct seeding devices 11 and 11 are located at the positions. Of course, Figure 4
As shown in (a), a pair of right and left direct seeding devices 1 at the left end
1, 11 and a pair of right and left direct seeding devices 11, 1 at the right end
When the position in the vertical direction is the same as that of one set, the pair of right and left direct seeding devices 11 in the center are also located at the same height position in the vertical direction. Thereby, there is an advantage that a sensor such as a grounding body or an actuator for adjusting the vertical position for the pair of right and left direct seeding devices 8 in the center can be eliminated.

[Other Embodiment] In the above embodiment, the first detector and the second detector are constituted by one potentiometer, but they are constituted by different detecting means to perform calculation and the like. It may be configured to perform.

In the above-mentioned embodiment, the direct seeding device arranged side by side is divided into three blocks, and among the blocks,
Lifting control is performed mechanically by linking bar members (rods) to the left and right sides so that the left and right sides are individually lifted and the center position is the average position of the left and right sides. However, each of the three blocks may be configured to be individually controlled to move up and down by the lifting actuator. In this case, the central block is also provided with a sensor such as a grounding body.

Further, as in the above embodiment, in order to control the center block of the direct seeding device divided into three sets of blocks on the left and right so as to be located at the average of the left and right blocks, Rather than having a mechanical structure in which each block is connected by a rod, the central block can also be individually moved up and down by an actuator so that it can be positioned to the average position calculated by the calculation means. Is also good.

In the above-described embodiment, a pair of right and left direct seeding devices is set as one set, and the structure is raised and lowered for each set. However, only one direct seeding device is set as one set, and each direct seeding device is set. It may be configured to be lifted and lowered. In addition, the number of direct seeding devices that can be simultaneously raised and lowered may be set to three or more, but in this case, in one flooded direct sowing device, the group of direct seeding devices that can be simultaneously raised and lowered is divided into at least two or more sets. It is a requirement. Further, a plurality of sets of direct seeding devices may be set so that the number of direct seeding devices belonging to each set is different, and the sets may be provided in one flooded direct seeding device.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a side view showing a submerged direct seeding mechanism.

FIG. 2 is a partially cutaway side view showing a main part of the direct seeding device.

FIG. 3 is a plan view showing the arrangement of floats and the like.

FIG. 4 is a vertical cross-sectional rear view showing each direct seeding device when they are located at substantially the same vertical position (a), and a vertical section showing each direct seeding device when the block of the left direct seeding device is higher than the block of the right direct seeding device. Rear view (b)

FIG. 5 is a vertical cross-sectional rear view showing a block (set) of the left direct seeding device.

FIG. 6 is a vertical cross-sectional rear view showing a block (set) of the center direct seeding device.

FIG. 7 is a vertical cross-sectional rear view showing the block (set) of the right direct seeding device.

FIG. 8 is a block diagram showing a control device and the like.

[Explanation of symbols]

 11 Direct Seeding Device 18 Grooving Device 19 Float 45 Grounding Body H Seeding Means S1 First Detection Means S2 Second Detection Means

Claims (1)

[Claims] 1. A float (19) having a grooving device (18) configured to be movable up and down in a mobile body, and sowing means for sowing seeds in a groove formed in a field by the grooving device (18). (H) and a soil cover means (2) for covering the seeds of the groove with soil.
1) is provided with a plurality of direct seeding devices (11) arranged side by side, the plurality of direct seeding devices (11) are divided into a plurality of blocks, and the direct seeding device ( 11), which is a setting reference for the grounding body (45) running on the ground surface, and first detecting means (S) for detecting the vertical position of the grounding body (45) with respect to the float (19).
1) and second detecting means (S2) for detecting hardness and softness of the soil by entering the soil, and the first detecting means (S1)
And, based on the detection result of the second detecting means (S2), the block is formed for each block with respect to the mobile body so that the groove formed by the groove making device (18) has a predetermined depth. A direct sowing machine with a float (19) that can be independently moved up and down.