JPH066008B2 - Grounding float lifting device for traveling work equipment for paddy fields - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a grounding float lifting device for traveling working machines for paddy fields.

(Prior Art) In a flooded direct seeder that sows seeds directly into a paddy field, a float with a grooving tool on the bottom surface is floated on mud, and seeds are placed in the grooves formed by the grooving tool while running. The seeds are then sown and then the seeds are covered with soil from the left and right of the groove.

The ground float must be grounded at the proper pressure to form the optimum groove for sowing. Therefore, conventionally, as disclosed in Japanese Utility Model Laid-Open No. 59-23913, a grounding float is connected to a support frame attached to a mobile device via a parallel link, and the grounding float is connected between the support frame and the parallel link. It is configured by providing a ground pressure applying means for elastically pressing the ground float, the ground pressure applying means pivotably supports the lower end of the rod on the upper link, and the upper part of the rod is vertically movable by a bracket protruding from the support frame. A spring for elastically pressing the upper link downward is disposed between the bracket and the upper link, and the spring is fitted to the rod.

(Problems to be Solved by the Invention) In the conventional example, the point of action of the elastic pressure applied to the parallel links by the ground pressure applying means is always the pivotal support between the upper link and the rod, and the height of the float changes. But its position is unchanged. Therefore, when the float is low, the ground pressure is weak, and when the float is high, the ground pressure is strong, and the amount of movement of the upper link determines the magnitude of the acting force of the spring as it is, and the fluctuation range of the acting force is large. It has a great influence on the groove formation.

Therefore, according to the present invention, an elevating arm that swings up and down by an actuator attached to a support frame and a ground float are connected by a string-like body having a spring portion, and the string-like body is hung on a pulley to provide a light and smooth movement. An object of the present invention is to make it possible to easily adjust and remove the string-shaped body while ensuring the lifting and lowering and preventing the string-shaped body from being separated from the pulley.

(Means for Solving Problems) In the present invention, a grounding float 21 is vertically movably mounted on a supporting frame 10, and an ascending / descending vertically swinging operation of an actuator 76 provided on the supporting frame 10. Arm 38
A grounding float lifting device for a paddy field traveling working machine comprising a string-like body 36 for connecting the grounding float 21 and the grounding float 21 via a pulley 39. I am taking steps.

That is, in the present invention, a spring portion 36A is provided in a part of the string-like body 36, a connecting fitting 44 is provided at an end portion of the string-like body 36 via an expansion and contraction adjusting fitting 41, and the connecting fitting 44 is It is characterized in that it is provided with a screw connector 46 that is detachably engaged with and attached to the elevating arm 38.

(Working) As the mobile body 1 travels, the grounding float 21 slides on the mud surface, and when the float is for direct sowing, a groove is formed by the grooving tool 20.

When the mud surface is soft, the sinking of the grounding float 21 becomes large, so the actuator 76 is contracted to raise and lower the arm 38.
By swinging upward, the grounding float 21 is lifted through the string-like body 36 having the spring portion 36A to prevent the float 21 from excessively sinking and reduce the grounding pressure.

On the other hand, when the mud surface is hard, the actuator 76 is extended to swing the elevating arm 38 downward to loosen the string-like body 36 and the ground float 21 resists the elastic force of the spring portion 36A due to its own weight or the like. Is lowered to increase the ground pressure.

When the cord-like body 36 is loosened and the ground pressure is increased in this way, the tension of the spring portion 36A prevents the cord-like body 36 from attempting to separate from the pulley 39.

Further, the fine adjustment of the path length of the cord-like body 36 is performed by operating the expansion and contraction adjusting metal fitting 41.

On the other hand, when removing the grounding float 21 from the support frame 10, etc., the screw connecting tool 46 that fastens the connecting metal fitting 44 with a screw.
At this time, the screw fitting 46 can be loosened while the connecting fitting 44 is still engaged with the elevating arm 38, and can be easily removed even if the spring portion 36A is provided.

(Example) In FIG. 5 schematically showing the overall configuration, 1 is a traveling working machine for paddy fields, and in this example, a riding rice transplanter having a driver's seat 2, a pair of left and right rear wheels 3, and the like. The linking mechanism 4 is provided with a seedling placing table 5, a center float 6, a pair of left and right side floats 7, a planting mechanism 8 and the like.

A driving case 9 drives the planting mechanism 8 by transmitting power from an engine (not shown).

Reference numeral 10 denotes a support frame, which is attached to the rear portion of the drive case 9 across a work advancing direction via a bracket (not shown), and a tank device is attached to the support frame 10 via a stay 11.
12 are installed.

The support frame 10 is a pipe material, and is provided with a plurality of mounting flanges 14 to which the submerged direct seeding unit 13 is detachably mounted, at intervals in the lateral direction (see FIG. 8).

Referring to FIG. 1 and FIG. 8, etc., the submerged direct seeding unit 13
Is the mounting bracket 15 and pin 1
A parallel link mechanism composed of an upper link 18 and a lower link 19 pivotally supported by 6, 17 and a float, a float 21 having a groove tool 20 on the bottom surface, and a post 22 standing upright from the float 21 Is provided with a soil cover 23 that is pivotally supported so that it can move up and down.
The rear end of the parallel link mechanism is pivotally supported on the upper side of 22 via pins 24 and 25.

Further, a seeding lower chute 26 made of a transparent hard resin is attached to the mounting bracket 15 by a pin 27 in a rearwardly inclined shape, and the discharge port of the chute 26 has a shutter 28 which can be opened and closed and is bent vertically downward. , Which faces the upper side of a planar U-shaped guide plate 29 erected from the float 21.

The mounting bracket 15 is each mounting flange of the support frame 10.
It is fitted to 14 and attached by two detachable mounting pins 29 shown in FIG.
As shown in FIG. 7 and FIG. 10, a total of 6 pieces are arranged at a lateral interval in this embodiment on the left and right sides of the center float 6 of the rice transplanter and on the left and right sides of each side float 7 of the rice transplanter. .

The float 21 of the submerged direct seeding unit 13 is biased toward the ground by hanging an ammunition machine 30 represented by a coil spring over the pin 17 and the pin 24 of the parallel link mechanism, and
The soil cover 23 comprises a mounting rod 31 and a pair of left and right soil cover plates 32 fixed to the mounting rod 31, and at the portion that pivotally supports the mounting rod 31 on the column 22 so as to move up and down, an ammunition 33 shown by a crane spring is provided to ground. Biased in the direction.

The ammunition 30 of the float 21 and the ammunition 33 of the soil cover 23 may have configurations other than those shown in the drawings.

Here, in the present embodiment, six grooves are formed in the soil in the groove by the groove making tool 20 of the float 21, seeds (coating fir) of each groove are spotted, and the seeds are covered by the soil cover plate 32. It is supposed to cover the soil from the left and right. In FIG. 1, reference numeral 34 denotes a soil covering stopper, which is constituted by a bar member 35 projecting laterally from the mounting bar 31 hitting a rear surface side of the guide plate 29.

Furthermore, the float 21 of the flooded direct seeding unit 13 has a cord body.
36 and the soil cover 32 are connected to the elevating arm 38 via the pulleys 39, 40 and the like by the cord 37.

Further, as shown in FIG. 4, an interlocking rod 42 is installed on a supporting plate 10A projecting from the supporting frame 10 so as to be parallel to the supporting frame 10 and rotatable about its axis. The arm 38 has a rearward descending shape, and the number of units, six in this example, is projected, and the elevating arms 38, the float 21, and the soil cover 23 are connected by string-like bodies 36, 37.

That is, as shown in FIGS. 1 and 4, the pulley 39
Has two pulley grooves 39A and 39B and is rotatably mounted on the pin 16 of the parallel link mechanism.
It is mounted to be freely rotatable.

The float string-like body 36 is a wire having a spring portion 36A, one end of which is hooked to the column 22 and wound around the pulley 39, and the other end of which is attached to a metal fitting 41 which has a screw structure and is adjustable in expansion and contraction. .

The soil-covering string 37 is a wire having a spring portion 37A, one end of which is connected to a mounting rod 31 by a pin 31A, which is wound around a pulley 40 and a pulley 39 as shown in FIG. 1, and the other end has a screw structure. It is attached to a metal fitting 43 that can be adjusted for expansion and contraction.

The metal fittings 41, 43 of each string-like body are bifurcated (U shape) as shown in FIG.
The shape is connected to the connecting bracket 44 by the common pin 45,
The connecting fitting 44 is fitted into the elevating arm 38 from above and is attached by screwing a screw connecting tool 46 having a hook-shaped knob 46A to the arm 38.

Therefore, each submerged direct seeding unit 13 is detachably attached to the rear side of the mobile body 1 (substantially the support frame 10) through insertion / removal of the attachment pin 29 and fastening / loosening of the screw connector 46. The float 21 of the unit 13 is arranged so as to overlap the side float 7 of the rice transplanter in the front-rear direction as shown in FIG. 10, so that the overall front-rear length is made as short as possible.

Referring to FIG. 1, FIG. 7 and FIG. 10, the actuator is tilted downward from the support frame 10 in the forward direction, and in this embodiment, between the sensor float 6 of the rice transplanter and the side float 7 on the right side, the actuator. Mounting arms 47 such as are projected,
As shown in FIG. 2, a horizontal shaft 48 is provided on the protruding end side of the mounting arm 47.
On this horizontal axis 48, an arm 50 for a wheel-shaped grounding body 49 which runs on the ground surface in this embodiment, and a circular disk which enters the soil to detect the hardness and softness of the soil are attached. An arm 52 for a detection body 51 shown by is provided so as to be vertically movable.

The mounting bosses 50A, 52A of the respective arms 50, 52 are rotatably supported by being fitted on the horizontal shaft 48, and the respective arms 50, 52 are extended rearward and downward as shown in FIG. Attach the grounding body 49 to the boss 50B (the boss of the arm 52 is coaxial with the boss 50B).
And the detection body 51 are both rotatably supported via a lateral support shaft.

Reference numeral 53 is a first angle sensor (potentiometer), which detects relative angular displacement between the grounding body 49 and the detection body 51 as shown in FIGS. 1 and 2.

That is, the sensor mounting plate 54 is fixed to the boss 52A, the sensor 53 is removably mounted on the mounting plate 54, and
The interlocking arm 56 having the roll 55 is fitted and fixed to the shaft 53A of the sensor 53, and the coil spring 58 is stretched over the interlocking arm 56 and the arm 57 projecting from the horizontal shaft 48.
Is urged clockwise in FIG.

On the other hand, an interlocking arm 59 is provided on the boss 50A so as to project forward, and a roll 55 is provided with a spring 58 on the lower edge of the interlocking arm 59.
Is abutted via the bullet drawing.

Reference numeral 60 denotes a lowering mechanism for the grounding body, which is a guide plate 62 fixed to an actuator mounting plate 61 as shown in FIGS.
This guide plate 62, a rod 63 having a large number of adjustment holes 63A inserted so as to be vertically movable, and coils 64, 65 arranged around the rod 63 and arranged above and below the guide plate 62.
And spring restraining pins 66, 67, etc., which can be inserted into and removed from the adjustment hole 63A, and the lower end of the rod 63 is connected to the arm 50 via the pin 68, etc.
Is engaged from the upper surface side.

Here, the grounding body 49 is such that a push-up coil spring 64 and a push-down coil spring 65 are arranged above and below the guide plate 62 on the rod 63 which is inserted into the guide plate 62, and the spring pressure thereof is at the positions of the pins 66 and 67. It is designed to travel on the ground surface which is adjusted by the standard setting (neutral position). That is, when the soil is hard, the urging force of the push-up coil spring 64 is balanced by the push-down coil spring 65, while when the soil is hard, the urging force of the push-down coil spring 65 is balanced by the push-up coil spring 64. 49 is made to travel on the ground surface which is the setting reference, while the detection body 51 is designed to enter the soil exclusively by the biasing force of the coil spring 72,
When the soil is hard, the amount of entry is small, and when the soil is soft, the amount of entry is large. Therefore, the relative angular displacement is detected by the first angle sensor 53.

69 is a lowering mechanism for the detecting body, which is a mounting plate 61 as shown in FIG.
Fixed to the guide plate 70, a rod 71 having a large number of adjustment holes inserted through the guide plate 70 so as to be vertically movable, a coil spring 72 wound around the rod 71, and inserted into and removed from the adjustment hole of the rod 71. It consists of a spring restraining pin 73 etc.
The lower end of 71 is engaged from the upper surface side of the arm 52 via a pin 74 or the like. In FIGS. 1 and 3, reference numeral 75 denotes a lower limit regulating stopper for each arm 50, 52.

The pair of left and right mounting plates 61 are erected upright from the mounting arm 47 so as to project upward, and an actuator 76 shown by a telescopic cylinder is mounted on the pair of left and right mounting plates 61.
Has a piston part that can be rotated forward and backward via screws, nuts, etc. on the output side of the planetary reduction mechanism that is started and stopped by an electric motor, and has a piston rod 77 that can expand and contract in conjunction with this piston. The end of the piston rod 77 is pivotally supported via a pin 79 by a connecting fitting 78 fitted and fixed to the interlocking rod 42.

Therefore, in FIG. 1, when the actuator 76 is extended, the interlocking rod 42 is rotated in the clockwise direction in FIG. 1 via the connecting fitting 78, whereby the lifting arms 38 are swung in the same direction. , When the actuator 76 shrinks,
Each elevating arm 38 is swung in the counterclockwise direction in FIG.

A second angle sensor (potentiometer) 80 is detachably fixed to the arm 10A protruding from the support frame 10.

The sensor shaft 80A of the second angle sensor 80 is an interlocking rod 42.
An interlocking roller 82 is provided via an axis 83 to an arm 81 fitted and fixed to the sensor shaft 80A on the axis of the interlocking roller 82, and the interlocking roller 82 is abutted and engaged from the upper surface side of the elevating arm 38. ,
On the other hand, the interlocking roller 82 is urged in the abutting direction to the elevating arm 38 by tensioning the coil spring 85 on the arm 84 protruding from the support frame 10 and the shaft 83. Here, the second angle sensor 80 is The angle of the lifting arm 38 can be detected.

Therefore, the grounding body 49 and the sensing body 51 by the first angle sensor 53
The actuator 76 is expanded and contracted by comparing the detection signal of the relative angular displacement with the signal of the second angle sensor 80.

The control circuit of this actuator 76 is shown in FIG.

In FIG. 6, 86 is a power switch for battery power,
87 is a motor drive circuit, 88 is a current detection circuit, and 89 is a DM motor, which drives the actuator.

Reference numeral 90 denotes a comparison circuit, which compares the signal of the first angle sensor 53 with the feedback signal of the second angle sensor 80 to turn ON / OFF the motor drive circuit 87 via the operation determination circuit 91 and to determine the direction determination circuit. The motor 89 is normally and reversely rotated via 92.

The comparison circuit 90 has an error detecting and amplifying function.

In addition, in FIG. 6, reference numeral 93 is a simple chopper type speed switching circuit, which is connected to the low speed setting unit 94 and the low speed range setting unit 95, and is linked to the operation determining circuit 91 by the chopper. 96 is an upper / lower limit input, 97 is a hysteresis adjustment unit, 98 is an operation start error value adjustment unit, 99 is an amplification and determination unit of a current detection unit, and an overcurrent signal is sent to the operation determination circuit 91. 100 is the instantaneous breaking current setting unit, 101 is the timed breaking current setting unit, 102
Is a heating detector, and 103 is a constant voltage power supply.

Referring to FIG. 11, a planting mechanism 8 is shown. The seed feeding roll and the fertilizer feeding roll in the tank device 12 are driven in conjunction with the planting movement of the planting mechanism 8 and the seed seeding shutter 28 for seeds is used. Is designed to open and close.

In FIG. 11, a crankshaft 104 is rotatably supported by the drive case 9, and a planting arm 106 is pivotally supported by a crank arm 105.

The planting arm 106 has a cam, a spring and the like built therein, and has a planting claw 107, an extruding metal fitting 108, etc., and is a known planter.

109 is a swing arm, which is pivotally supported by the planting arm 106, and when the crankshaft 104 continuously rotates, the planting arm 106 makes an elliptical motion,
The swing arm 109 swings in the front-rear direction with the shaft 109A as a fulcrum.

Reference numeral 110 denotes a shutter interlocking mechanism, which has an arm 112 at the shaft end of a shaft 111 that supports the shutter 28 so that it can be opened and closed, and the lower end of the interlocking arm 113 is a pin 114 on the front side of the mounting bracket 15.
The arm 112 and the interlocking arm 113 are pivotally supported 116 and 117 by a interlocking rod 115 having a turnbuckle structure whose shaft length is freely extendable and retractable, and the pivotal portion is connected to the rear surface side of the pivoting arm 109. It has a corresponding roller 118.

119 is a spring for closing the shutter.

In this shutter interlocking mechanism 110, when the swing arm 109 is located in the front, the roller 118 is contacted and the shutter 28
Is closed and the swing arm 109 swings backward, the interlocking rod 115 is pushed to the right in FIG.
The shutter 28 is opened against this, and by repeating this movement, the seeds T in the chute 26 are spotted.

In this case, the interlocking mechanism 110 moves the interlocking rod 115 to the swing arm.
Although it is possible to perform point seeding by pivotally connecting to the 109, the roller 118 side is pressed against the swinging arm 109 as in the illustrated example, so that when the shutter 28 is closed, the movement of the swinging arm 109 to the front is continuous. Gone, here, shutter 28
It is possible to prevent excessive closing, deformation of the shutter 28, damage to the chute, and the like.

Each lower end of an interlocking rod 120 for driving a roll is pivotally connected to the swing arm 109.

Referring to FIGS. 7, 9 and 14 to 16, details of the tank device 12 are shown.

In FIG. 14 and FIG. 15, the tank 121 is partitioned by a partition plate 122 into a front accommodation portion 123 and a rear accommodation portion 124, and the front accommodation portion 12
The granular fertilizer P is stored in 3, and the coated seed T is stored in the rear storage portion 124.

125 is a feeding part, which is made by fitting and fixing a fertilizer feeding roll 126 and a seed feeding roll 127 on a common roll shaft 128, and each of the rolls 126, 127 has a feeding groove 1 at a radial position on the outer periphery thereof.
It has 26A and 127A and is rotatable in the direction of arrow D in FIGS. 14 and 15.

That is, the feed mechanism 13 having the arm 129 on the roll shaft 128
By providing 0 and pivotally connecting the upper end of the interlocking rod 120 to the arm 129, the swinging of the swinging arm 109 causes the arm 129 to move up and down, so that the roll shaft 128 is driven in the arrow D direction. I have to. In FIG. 16, 131 indicates a check mechanism. In addition, this roll drive (interlocking) mechanism,
In addition to the rod type shown in the figure, a winding type such as a chain or a belt may be used.

Reservoirs 123A and 124A are respectively formed on the rear side of the rolls at the bottoms of the accommodating portions 123 and 124. The fertilizer P in the reserves 123A is pumped up by the grooves 126A of the rolls 126 and metered by the metering brush 132. Through the discharge port hopper 133 on the front side and the discharge chute 134 which is inclined downward in the front direction, the rice planter is allowed to fall on both the left and right sides of the center float 6 and the left and right sides of the side float 7 (10th position). See figure).

Further, the seeds T in the storage section 124A are pumped up by the groove 127A of the roll 127, and are seeded in the groove formed by the grooving tool 20 via the discharge port hopper 135 on the front side and the discharge chute 136 which is inclined rearward. It is adapted to be spotted through the shutter 28.

Here, the fertilizer chute 134 and the seed chute 136 are distributed to the front and back with the fertilizer for the fertilizer as the forward descent and the seed for the chute as the backward descent, and the fertilizer P can be applied to the lateral strip fertilization prior to the submerged direct seeding unit 13. Has been done.

Further, 137 is a fertilizer cover, which is arranged behind the lower end of the discharge opening of the chute 134 as shown in FIG.

In this case, as shown in FIG. 10, the float 21 of the direct watering unit 13 has a front end portion which widens rearward and rearward in plan view as shown in FIG.
21A has a so-called boat shape in which it is expanded upward, and the standing portion 21A is located on the rear extension line of the lower end of the discharge opening of the chute 134 so that the standing portion 21A has a function of covering the fertilizer with soil. ing.

This is because the soil cover 137 makes up for the lack of soil and
Center float 6 and side float 7 as shown in Fig. 0
When the grounding body 49 and the detection body 51 are attached to the front side as much as possible in the unpressed area between and, the soil cover 137 becomes an obstacle, so when the soil cover 137 is removed, the soil covered by the elevation 21A. This is especially significant because it is possible.

Both rolls 126 and 127 are juxtaposed on the roll shaft 128, and the communicating portions 123B and 124B of the rolls 126 and 127 are juxtaposed as shown in FIG. Further, 121A indicates a canopy for a tank, which can be opened, closed and fixed.

Reference numeral 138 denotes a residual quantity take-out device, which forms residual quantity take-out ports 139, 140 at the bottoms of the storage sections 123A, 124A, and shutters 141, 142 for opening and closing the take-out openings 139, 140 are provided rotatably around a common axis 143 as a fulcrum. , The shutters 141, 142 from the rear side to the levers 145, 1
It can be opened and closed by operating 46.

Note that the shutters 141 and 142 are both biased in the closing direction by springs 147 and 148, and therefore, the remaining amount of fertilizer and seeds can be individually taken out to a non-illustrated saucer or the like, and since the remaining amount extraction is on the same side. It is convenient to attach and detach the saucer.

Reference numeral 149 is a protective cover for waterproofing, mudproofing, etc., and an opening / closing metal fitting 150 is attached to the lower side of the tank as shown in FIG.
Has an arm 152 that opens and closes with a bolt nut 151 as a fulcrum,
It can be opened and closed as indicated by arrow E in FIGS. 14 and 15.

Further, the protective cover 149 has a notch 153 corresponding to the seed chute 136 and fitted into the seed chute 136 from above. When the cover 149 is closed, the protective cover 149 is slightly closer to the connecting portion 154 between the chute 136 and the lower chute 26. Lower chute 2 engaged to the rear
Even when 6 is pulled out from the connecting portion 154, the mouth of the chute 136 is waterproofed.

That is, the chute 136 is also protected even when the flooded direct seeding unit 13 is removed and used as a side upper row fertilizer rice transplanter.

When the protective cover 149 is opened, the levers 145 and 146 for extracting the remaining amount can be manually operated.

The connecting portion 154 has an axial insertion structure, and the lower chute 26 is inserted when the submerged direct seeding unit 13 is mounted.

Further, the protective cover 149 is mounted over the entire width as shown in FIG. 7, and has opening and closing metal fittings 150 on both left and right ends thereof.

FIG. 17 shows another embodiment of the grounding body 49 and the detection body 51. The grounding body 49 has a chute shape or a boat shape so as to slide on a mud surface, and the detection body 51 is formed in a sled shape. Is.

In addition, if the grounding body 49 and the detection body 51 are unpressed parts other than the passing surface by the center float 6 and the side float 7,
Both may be provided separately.

Next, the automatic adjustment of the illustrated ground contact pressure and soil cover pressure will be outlined once again.

In FIG. 1, a grounding body 49 is mounted by a pushing coil spring 65 and a pushing up coil spring 64 so as to run on a mud surface at a set reference (neutral position), while a detecting body 51 is a coil spring.
72 into the soil, while float 21 and soil cover
The float 23 is connected to an elevating arm 38 that is moved up and down by an actuator 76 by string-like members 36 and 37, respectively.
Is slid on the mud surface in a floating state to form a groove with the grooving tool 20, and sows the groove to cover the soil.

During this work, when the mud surface is hard, the grounding body 49 tries to rise, but this is regulated by the pushing down coil spring 65, and the grounding body 49 travels slightly above the set reference plane, On the other hand, the entering amount of the detection body 51 becomes small.

Here, the relative angular displacement between the grounding body 49 and the detection body 51 occurs,
This is detected by the first angle sensor 53, the detection signal is compared with the signal of the second angle sensor 80, and the actuator 76 is extended to loosen the cord-like bodies 36, 37 and float 21.
The earth pressure of the soil is increased and the soil pressure of the soil cover 23 is controlled to be large.

On the other hand, when the mud surface is soft, the grounding body 49 tries to descend, but this is regulated by the pushing-up coil spring 64, and the grounding body 49 travels at or slightly below the set reference plane, while The amount of entry of the detection body 51 increases.

Here, the relative angular displacement between the grounding body 49 and the detection body 51 occurs,
This is detected by the first angle sensor 53, the detection signal is compared with the signal of the second angle sensor 80, and the actuator 76 is contracted to pull up the string-like bodies 36, 37 via the elevating arm 38. Lift the float 21 and the soil cover tool 23 to float 21
The ground pressure and the soil cover pressure of the soil cover 23 are controlled to be small.

In the above illustrated example, as shown in FIGS. 7 and 12 and 13, a plurality of tank devices 12 are arranged in the lateral direction (three in the figure).
A common protective cover 149 for the tank 121 installed side by side
Although equipped with 150, bolts 151, arms 152, etc., the protective cover 149 is such that, as shown in FIG. May be, according to this, the individual tanks
At 121, rainwater and the like can be prevented from entering from both sides.
In addition, in FIG. 18, portions common to FIG. 7 are denoted by common reference numerals.

(Effect of the Invention) As described in detail above, according to the present invention, since a part of the spring portion of the string-like body that connects the lifting arm operated by the actuator and the grounding float is provided, the paddy field can be made hard and soft. It is possible to obtain a proper grounding pressure corresponding to it, and even if the cord-like body is loosened, the tension from the pulley can prevent the cord-like body from coming off the pulley. Further, even if the cord-like body is provided with a spring portion, a connecting metal fitting is provided at an end portion of the cord-like body through an expansion and contraction adjusting metal fitting, and the connecting metal fitting is detachably engaged with the elevating arm for screw connection. Since the tool is provided, it is possible to easily connect and disconnect the string-like body by fastening and loosening the screw connecting tool, and to easily attach and detach the ground float there.

[Brief description of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a side view of a main part,
FIG. 2 is a view shown in FIG. 1A-A, and FIG. 3 is FIG. 1B-B.
1. FIG. 4 is a side view of the entire configuration, FIG. 6 is a block diagram of the control circuit, FIG. 7 is a schematic rear view of the whole, and FIG. The figure is a side view of the flooded direct sowing unit, Fig. 9 is a rear cross-sectional view of the tank device, Fig. 10 is a schematic plan view showing each arrangement state, and Fig. 11 is a side view showing the interlocking relationship between the planting mechanism and the point sowing shutter. Fig. 12 is a side view of the main part of the protective cover installation, Fig. 13 is a rear view of the same, Fig. 14 is an elevation sectional view of a tank device showing a seed feeding part, and Fig. 15 is a tank showing a fertilizer feeding part. FIG. 16 is a side view showing an example of the interlocking system of the feeding roll, FIG. 17 is a side view showing another example of the grounding body and the detecting body, and FIG. 18 is corresponding to FIG. It is another whole rear view. DESCRIPTION OF SYMBOLS 1 ... Mobile body, 20 ... Grooving tool, 21 ... Float, 26 ... Seeding chute, 23 ... Soil cover, 30,33 ... Ammunition, 36, 37 ... String-like body, 38
… Lifting arm, 49… Grounding body, 51… Sensing body, 53, 80… Sensor, 76… Actuator.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Masaji Izuhara 64 Ishizukita-cho, Sakai City, Osaka Prefecture Kubota Iron Works Co., Ltd.Sakai Works (72) Inventor, Mikio Okuyama 64, Ishizukita-machi, Sakai City, Osaka Kubota Iron Works Company Sakai Factory (72) Inventor Hideaki Mizoda 64 Ishizukita-cho, Sakai City, Osaka Prefecture Kubota Iron Works Co., Ltd.Sakai Factory (72) Inventor Harada, No. 64 Ishizukita-machi, Sakai City, Osaka Kubota Iron Works Co., Ltd. In-house

Claims (1)

[Claims] 1. A support frame (10) on which a grounding float (21) is vertically movably mounted, and said support frame (10)
The pulley (39) that connects the grounding float (21) with the lifting arm (38) that swings up and down by the operation of the actuator (76) provided in (10)
A grounding float elevating device for a paddy field traveling work machine including a string-like body (36) to be connected via, wherein a spring portion (36A) is provided in a part of the string-like body (36), A connecting metal fitting (44) is provided at an end of the string-like body (36) through an expansion and contraction adjusting metal fitting (41), and the connecting metal fitting (44) is connected to the lifting arm (3).
8) A grounding float lifting device for a paddy traveling work machine, comprising a screw connector (46) detachably engaged with and attached to the 8).