JPH032093Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a planting control device for a rice transplanter for multi-row planting equipped with two or more floats.

"Prior Art" Conventionally, there has been a technology in which a single sensor shaft is provided to transmit planting depth signals from two or more floats, as shown in, for example, Japanese Unexamined Patent Publication No. 59-59107.

``Problems to be solved by the invention'' In the conventional technology, the sensor shaft becomes extremely long due to an increase in the number of floats attached or an expansion in the width of the float, and as a result, the sensor shaft bends and the planting depth signal cannot be transmitted. There is a problem that the transmission of the sensor becomes uncertain, and by increasing the number of bearings that support the sensor shaft, the sensor shaft becomes distorted and the sensor load increases.

"Means for Solving the Problem" However, the present invention is a device that outputs planting vertical adjustment signals from two or more floats, in which a sensor shaft for outputting a planting vertical adjustment signal from each float is connected to each float. The axes of the respective sensor shafts are made to coincide with each other, and a connecting member for outputting the planting depth is attached to the abutting portion of each sensor shaft.

``Operation'' Therefore, each of the sensor shafts is provided with a two-point support structure so that even if misalignment occurs, each sensor shaft can be prevented from being twisted, and the sensor load of the other floats can be reduced by the raising signal of one float. The lever for outputting the planting depth can be operated without being affected by the pressure, and the conventional boss connecting the float and sensor shaft is not required, reducing rattling due to machining errors, etc., and the detection sensitivity is higher than that of the conventional method. This improves the transmission of the planting depth signal and ensures reliable transmission of the planting depth signal.

"Embodiments" Examples of the present invention will be described below in detail based on the drawings. Fig. 1 is a plan view of the main parts, Fig. 2 is a side view of the riding rice transplanter, and Fig. 3 is the same plan view. The rear end of the vehicle body frame 3 is connected to a transmission case 4, and front wheels 6 for driving in paddy fields are supported on both sides of the front part of the transmission case 4 via an axle case 5. A transmission case 7 is arranged in series, and the transmission case 7
A rear wheel 8 for running in paddy fields is supported at the rear end. A spare seedling stand 10 is attached to both sides of the bonnet 9 that covers the engine 2, etc., and the transmission case 7 is attached to the vehicle body cover 12 forming the step 11.
etc., and a driver's seat 13 is placed on the top of the vehicle body cover 12.
A steering handle 14 is provided at the rear of the bonnet 9 in front of the driver's seat 13.

In addition, 15 in the figure is a planting section equipped with a seedling stand 16 for multi-row planting, a plurality of planting claws 17, etc.
8 and the planting case 20 via the guide rail 19
The planting claw 17 is attached to the planting case 20 via a planting arm 21 that is supported so as to be slidable in left and right reciprocating motion and is moved by a crank, and a planting claw drive shaft 22. And below the planting case 20,
A plurality of inner traveling floats 23a, 2 for planting leveling
3b, and left and right outermost running floats 24a, 24b supported via a planting depth adjustment link 25 and a buffer link 26, and a link hitch 27 is provided on the front side of the planting case 20, and a top link is provided. The planting part 15 is connected to the rear side of the traveling vehicle 1 by this link hitch 27 via a three-point linkage mechanism 30 including a lower link 28 and a lower link 29, and a hydraulic cylinder 31 for raising and lowering the planting part 15 is connected to the transmission case 4. It is interposed between the rear part and the top link 28, and the planting part 15 is raised and lowered by the expansion and contraction operation of the hydraulic cylinder 31, while the planting part 15 is lowered to land each float 23, 24a, 24b, It is configured so that one seedling is taken out one by one by a planting claw 17 from a seedling table 16 that is moved back and forth from side to side and planted.

Further, in the figure, 32 is a travel gear shift lever, 33 is a planting lift lever, 34 is a planting depth sensitivity adjustment lever, and 35 is a planting depth sensitivity adjustment lever.
is a travel clutch pedal, and 36, 36 are left and right brake pedals.

Furthermore, as shown in FIG. 1 and FIG.
3 is provided on the bracket 38 on the rear upper surface, and a planting depth adjustment fulcrum shaft 39 is rotatably supported on the planting case 20, and the base end of the planting depth adjustment link 40 is fixed to the adjustment fulcrum shaft 39. , the tip of the adjustment link 40 is connected to the pitting fulcrum shaft 37, and the planting depth adjustment lever 41 is connected to the planting depth adjustment fulcrum shaft 39, and a planting depth adjustment plate is provided in the planting case 20. 42 to releasably lock the intermediate part of the lever 41, and by operating the lever 41, each planting case 20... and each float 23a,
The planting depth is set by changing the relative support intervals of 23b, 24a, and 24b.

In addition, a bracket 20 is attached to the front end of the planting case 20.
A sensor shaft 43 is pivotally supported via a, a planting depth fulcrum link 44 is rotatably supported at the middle of the sensor shaft 43, and a connecting arm 4 is attached to the rear end of the fulcrum link 44.
5, and the base end of the connecting link 46 is fixed to the planting depth adjustment fulcrum shaft 39, and a collar 48 is attached to the tip of the fulcrum link 44 via the fulcrum shaft 47, The rear end of the planting depth correction link 49 is connected and fixed to the collar 48.

One end of a planting depth output link 50 is connected and fixed to the sensor shaft 43, and the correction link 49 is connected to the other end of the output link 50 via an output arm 51.
The fulcrum link 44 and the correction link 4
9. The sensor shaft 43 and the support shaft 47 are connected by a parallel link mechanism R consisting of an output link 50 and an output arm 51. Further, the top end of the planting depth detection arm 53 is connected to the tip of the correction link 49 via a pin 52, and the bracket 54 and pin 5
The lower end of the detection arm 53 is connected to the upper surface of the front end of the inner traveling floats 23a, 23b via the support shaft 4, and the planting depth detection fulcrum of the correction link 49, which moves in conjunction with the elevation of the front ends of the floats 23a, 23b, is connected to the support shaft 4.
7, and the planting depth correction fulcrum of the correction link 49, which is linked to the operation of the adjustment link 40 by operating the planting depth adjustment lever 41, is formed by the support shaft 47, and the pitching of the floats 23a and 23b A planting depth correction link 49 is provided to detect the operation and the planting depth adjustment operation of the planting depth adjustment lever 41, and the planting depth correction link 49 is displaced in conjunction with the pitching operation of the floats 23a and 23b. The planting depth detection fulcrum and the planting depth correction fulcrum of the correction link 49 when adjusting the planting depth are made to coincide, and each of the fulcrums is formed by a single support shaft 47, and the planting depth signal is sensor shaft 43 that transmits
and the support shaft 47 are connected by a parallel link mechanism R, so that even if the planting depth is changed, the planting depth detection sensitivity is kept substantially constant.

Further, an auxiliary fulcrum link 56 is provided parallel to the fulcrum link 44 and supports the support shaft 47 on the sensor shaft 43.
At the same time, receiving tubes 57, 57 are connected and fixed to the inner ends of the left and right sensor shafts 43, 43, and left and right levers 58, 59, which are connecting members for outputting the planting depth, are fixed to each of the receiving tubes 57, 57. do. and each receiver 5
7 and 57 are provided with intermediate shafts 60 into which both ends are rotatably inserted, and the left and right sensor shafts 4 have a cantilevered structure.
The inner ends of 3 and 43 are connected via the intermediate shaft 60 to connect the sensor shafts 43 and 43 that operate independently into a single shaft to prevent the sensor shaft 43 from bending, and to prevent the sensor shaft 43 from bending. 59, the right receiving arm 6
2 to the intermediate shaft 60, and the left receiving arm 61 to the intermediate shaft 60 through the collar 63. float 23
The left and right sensor shafts 43, 43 that output planting depth signals from a, 23b are connected to the respective floats 23a, 23b.
The axes of the sensor shafts 43, 43 are aligned, and the left and right levers 58, 59 for outputting the planting depth are attached to the abutting portions of the sensor shafts 43, 43, and when the sensor shafts are in a deep planting state, Float 2 centered around axis 37
When the front parts of 3a and 23b rise, the sensor shaft 43 is rotated via the detection arm 53, the correction link 49, the output arm 51, and the output link 50, and the levers 58 and 59 are brought into contact with the receiving arms 61 and 62. to rotate the receiving arms 61 and 62, and the float 23
It is configured to transmit only the planting depth increasing signals of a and 23b.

Further, an outer receiving plate 64 is provided to be fixed to the planting case 20, and a planting depth detection wire 65 is connected to the left receiving arm 61.
One end of the outer wire 66 to be inserted is fixed to the outer receiving plate 64, and as shown in FIG. The relative distance between the arm 61 and the left lever 58 is adjusted using the bolt 67, and the left float 23a is
The detection position of the right float 23b is adjusted by the bolt 67, and the detection position of the right float 23b is adjusted by adjusting the attachment of the outer wire 66 on the outer receiving plate 64, so that the left and right floats 23a and 23b operate at approximately the same position. are doing.

Further, a hydraulic pump 68 is connected to the hydraulic cylinder 31.
A hydraulic switching valve 69 is provided, and a lowering spring 71 is provided to project a spool 70 of the valve 69, and one end of a switching cam 72 whose intermediate portion contacts the spool 70 is attached to a fixed support shaft 73 on the body side. A lowering operation spring 74 is connected to one end of the cam 72 to support the switching cam 72 and move the switching cam 72 away from the spool 70 . Further, the detection wire 65 is connected to the other end of the cam 72, an outer receiving plate 75 is fixed to the sensitivity adjusting lever 34, the outer wire 66 is connected to the receiving plate 75, and switching is performed by operating the lever 34. Receiving plate 75 on cam 72
are brought into contact with each other, and the angles of the floats 23a and 23b relative to the ground are changed relative to the neutral range of the hydraulic switching valve 69.

The present invention is constructed as described above, and by operating the sensitivity lever 34, the floats 23a, 23 are adjusted in this neutral range with respect to the neutral position of the hydraulic switching valve 69.
When the planting field surface is hard, the front portions of the floats 23a and 23b are slightly raised by insensitive operation of the lever 34, while when the planting field surface is soft, the floats 23a and 23b are raised slightly by sensitive operation of the lever 34. The front parts of the floats 23a, 23b are slightly lowered, and the depth of the floats 23a, 23b at the rear of the floats 23a, 23b sinks into the rice field is kept approximately constant, and seedlings are planted by the planting claws 17 regardless of the hardness or softness of the planting rice field. Keep the depth approximately constant.

In addition, each float 23 is planted deeply.
When the front end of at least one of the a and 23b rises, the correction link 49 is lifted up about the support shaft 47 via the detection arm 53, and the output link 50 is pulled via the output arm 51, so that the sensor shaft 43 , press the levers 58, 59 against the receiving arms 61, 62, pull the planting depth detection wire 65, press the switching cam 72 against the spool 70, switch the switching valve 69 to the raised position, and press the hydraulic cylinder 31. is raised, the planting section 15 is lifted to support the floats 23a and 23b substantially horizontally, and the planting depth of the seedlings by the planting claws 17 is kept substantially constant.

In addition, as the front ends of all the inner running floats 23a and 23b descend, each detection wire 65 becomes slack, and the switching cam 72 is connected to the spool 70.
The switching valve 69 is moved to the lowered position, the hydraulic cylinder 31 is operated to lower the planting part 15, and the planting depth of the seedlings by the planting claws 17 is kept approximately constant.

Furthermore, by operating the planting depth adjustment lever 41, the adjustment fulcrum shaft 39 is rotated, the adjustment link 40 is swung, and the pitching fulcrum shaft 37 is raised and lowered, and the planting case 20 is equipped with floats 23a, 23b, 24a,
24b are moved toward and away from each other to change the planting depth of the seedlings by the planting claws 17. In FIG. When this is done, the floats 23a and 23b move forward, but at this time, the fulcrum link 44 is rotated clockwise via the coupling link 46 and the arm 45, and the output arm 51 is rotated with the output link 50 stopped. Fulcrum link 44
The correction link 49 is lifted to lift the front parts of the floats 23a and 23b, and the support shaft 4
7 supports the correction link 49 in a dead zone position to keep the floats 23a, 23b horizontal.
by lowering the correction link 49 and float 23.
a, 23b are supported in a dead zone posture, and the sensor shaft 43
The planting depth can be changed without rotating the output link 50 or changing the planting depth adjustment sensitivity. Note that when the intermediate shaft 60 is firmly supported in the planting case 20, etc., this shaft 6
Needless to say, there is no need to connect the receiving tube 57 to the 0.

"Effects of the Invention" As is clear from the above embodiments, the present invention provides a device for taking out planting vertical adjustment signals from two or more floats 23a, 23b.
Sensor shafts 43, 43 that output a planting vertical adjustment signal from 23b are provided for each float 23a, 23b, respectively, and the axes of each sensor shaft 43, 43 are aligned to form a mating portion of each sensor shaft 43, 43. Connecting members such as planting depth output levers 58 and 59 are attached to the sensor shafts 43 and 43, respectively.
Even if misalignment occurs due to the point support structure, each sensor axis 4
3, 43 from being twisted, and the planting depth output levers 58, 59 are not affected by the sensor load of the other float 23b or 23a due to the raising signal of one float 23a or 23b.
In addition, it eliminates the need for bosses, etc. that connect the float and sensor shaft as in the past, reducing rattling caused by machining errors, and improves detection sensitivity when planting. This has practical effects such as being able to reliably transmit depth signals.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the main parts showing one embodiment of the present invention, Fig. 2 is a side view of the riding rice transplanter, Fig. 3 is the same plan view, Fig. 4 is a side view of the main parts, Fig. 5 is a partial explanatory diagram. 23a, 23b...inner running float, 43...
...Sensor shaft, 58, 59...Lever for outputting planting depth (connection member).

Claims (1)

[Scope of utility model registration request] In a device that outputs planting vertical adjustment signals from two or more floats, each float is provided with a sensor shaft that outputs a planting vertical adjustment signal from each float, and the axis of each sensor axis is aligned to connect each sensor. A planting control device for a rice transplanter, characterized in that a connecting member for outputting a planting depth is attached to a mating part of the shaft.