JP7162548B2 - Ride-on rice transplanter - Google Patents

Description

TECHNICAL FIELD The present invention relates to a ride-on rice transplanter provided with a traveling machine body and a seedling planting device supported on the rear part of the traveling machine body so as to be capable of being lifted and lowered.

In the riding-type rice transplanter described above, the seedling planting device is grounded on the field and includes a sensor float for detecting the height of the seedling planting device with respect to the field and leveling the field, and both lateral sides of the sensor float. A grounding float that grounds the field on one side and levels the field, a seedling planting mechanism that plants the seedlings in the field leveled by the sensor float, and a seedling planting mechanism that plants the seedlings in the leveled field by the grounding floats on both sides. and a seedling planting mechanism for planting, which is capable of controlling the height of the seedling planting device with respect to the field based on the detection result of the sensor float. In addition, some are provided with drivable grading rotor mechanisms for grading the field in front of the lateral ground floats.
As this type, there is a paddy field work machine disclosed in Patent Document 1, for example. The paddy field working machine disclosed in Patent Document 1 is provided with a paddy field working machine as a seedling planting device. A float is provided with the forward end of the ground sensor float positioned forward of the forward ends of the lateral ground floats. A ground leveling rotor is drivably provided in front of each lateral ground float.

JP-A-2011-10635

By positioning the front end of the sensor float forward of the front ends of the ground floats on both sides of the sensor float, it is possible to improve the detection performance of the sensor float, such as making it easier to take out the detection results from the sensor float from the front end of the sensor float. or advantageous. Where the front end of the sensor float is located forward of the front ends of the lateral ground contact floats, if conventional techniques are employed to enable leveling in front of each of the lateral lateral contact floats, A dedicated power transmission mechanism that transmits power to a ground leveling rotor that performs ground leveling in front of one of the ground floats on both lateral sides, and a front of the other ground float out of the ground floats on both lateral sides. Since a dedicated power transmission mechanism for transmitting power to the leveling rotor for leveling the ground is provided, the power transmission structure becomes complicated. It also becomes heavy due to the power transmission structure.

The present invention locates the front end of the sensor float ahead of the front ends of the grounding floats on both lateral sides, in which the seedling planting device is not far behind the traveling machine body, and the grounding on both lateral sides is achieved. To provide a ride-on type rice transplanter capable of leveling ground in front of each float with a power transmission mechanism having a simple structure.

The riding type rice transplanter according to the present invention is
A running body and a seedling planting device supported in a rear part of the running body so as to be capable of being lifted and lowered are provided, and the seedling planting device is grounded on the field so that the seedling planting device moves to the field. A sensor float that detects the height and levels the field, a grounding float that grounds the field on both sides of the sensor float to level the field, and a seedling on the field leveled by the sensor float. A seedling planting mechanism for planting, a seedling planting mechanism for planting seedlings in a field leveled by the grounding floats on both lateral sides, and a drive for leveling the field in front of the grounding floats on both lateral sides. a rotatable rotor support shaft provided in front of the sensor float and the ground floats on both lateral sides and extending in the lateral width direction of the vehicle body; , of the rotor support shafts, a pair of ground leveling rotor portions distributed to portions positioned in front of the ground contact floats on both lateral sides and provided so as not to rotate relative to each other; and of the rotor support shafts, the rotor support shafts an input portion provided only at one location between the pair of ground leveling rotor portions in the axial direction of the rotor shaft to which power for driving the rotor support shaft is input ; and a small-diameter ground leveling rotor portion that is provided at a portion positioned so as not to rotate relatively and has an outer diameter smaller than the outer diameter of the pair of ground leveling rotors, and in a plan view, the front end of the sensor float The front ends of the sensor floats are positioned forward of the front ends of the lateral ground floats, the front ends of the sensor floats are positioned forward of the rear ends of the pair of ground leveling rotors, and the input part and the small-diameter ground leveling rotor part , among the rotor support shafts, are arranged along the lateral width direction of the machine body in a region between the pair of ground leveling rotor portions and in front of the sensor float .

According to this configuration, when power is input to only one point in the axial direction of the rotor support shaft, the rotor support shaft rotates, and the ground leveling rotor portion positioned in front of each of the ground contact floats on both lateral sides of the rotor supports the rotor support shaft. Since it is driven by the shaft, it is sufficient to provide a power transmission mechanism with a simple structure that inputs power only to one point in the axial direction of the rotor support shaft. In a plan view, the front end of the sensor float is positioned forward of the rear ends of the ground leveling rotors positioned in front of the ground floats on both lateral sides. can be narrower than the gap between the traveling machine body and the sensor float in the rear end of the ground leveling rotor.

Therefore, in the case where the front end of the sensor float is positioned forward of the front ends of the ground floats on both lateral sides, the seedling planting device is not so far from the traveling machine body rearward, and the ground floats on both lateral sides are In order to level the ground in front of the rotor support shaft, it is possible to provide a power transmission mechanism having a simple structure that inputs power only to one point in the axial direction of the rotor support shaft. It is possible to reduce the weight of the rice transplanter because it is sufficient to provide a power transmission mechanism with a simple structure.

According to this configuration, it is sufficient to adopt a rotor support shaft having a short length compared to providing the input portion at a location laterally outside the ground leveling rotor portion, so that a compact ground leveling rotor mechanism can be obtained.

According to this configuration, since the outer diameter of the small-diameter ground leveling rotor portion is smaller than the outer diameter of the ground leveling rotor portion, the front end of the sensor float can be positioned forward of the rear end of the ground leveling rotor portion. Grading in front can be done by a small diameter grading rotor section.

In the present invention, the pair of ground leveling rotor units are composed of a plurality of ground leveling rotor units arranged in the axial direction of the rotor support shaft and mounted on the rotor support shaft. is set to a value equal to a divisor of the value of the distance between rows of seedlings in the axial direction.

According to this configuration, by preparing the number of leveling rotor part constituent bodies corresponding to the value of the distance between the seedling-planting rows, the two-row planting portion in which the seedlings are planted while the seedling-planting rows are separated from each other is prepared. Since the ground leveling rotor section can be configured to appropriately level the ground, a seedling planting device having different numbers of rows capable of planting seedlings can be easily provided with a ground leveling rotor mechanism for appropriately leveling the planting location. .

It is a left view which shows the whole ride-on type rice transplanter. It is a top view of a seedling planting apparatus. It is a front view which shows the fertilizing part in a seedling planting apparatus. It is a top view which shows a leveling rotor mechanism. It is a block diagram which shows up-and-down control.

An embodiment, which is an example of the present invention, will be described below with reference to the drawings.
In the following explanation, the direction of arrow F shown in FIG. 1 is "front of the machine", the direction of arrow B is "back of machine", and the direction of arrow U is "upper machine". , the direction of arrow D is defined as "bottom of the aircraft", the direction to the front side of the paper is "left of the aircraft", and the direction to the back of the paper is "right of the aircraft".

As shown in FIG. 1, the riding-type rice transplanter has a traveling body with a pair of left and right front wheels 1 steerable and drivable and a pair of left and right rear wheels 2 drivable. . A driving unit 4 having an engine 3 is formed in the front part of the traveling body. At the rear of the traveling machine body, a riding-type driving section 7 having a driver's seat 5 and a steering wheel 6 for steering the front wheels 1 is formed. A seedling planting device 10 is supported via a link mechanism 9 on the rear part of a body frame 8 of the running body. The link mechanism 9 is supported by the body frame 8 so as to swing up and down with respect to the body frame 8 by the extension and contraction of the hydraulic elevating cylinder 9a. The seedling planting device 10 has a lowering work state in which the sensor float 11 and the ground float 12 are grounded on the field by vertical swinging of the link mechanism 9 caused by the extension and contraction of the elevating cylinder 9a. It is operated up and down through a raised, non-working state spaced upwards with respect to the surface. A fertilizing device 50 for supplying powdery fertilizer to seedlings planted by the seedling planting device 10 is provided at the rear portion of the traveling machine body.

[Regarding the configuration of the seedling planting device]
As shown in FIGS. 1, 2 and 3, the seedling planting apparatus 10 includes a frame member 13 extending in the width direction of the traveling machine body, and a planting drive extending rearward from three positions aligned in the width direction of the frame member 13. A case 14 and a planting frame 15 provided with. In the central planting drive case 14 of the three planting drive cases 14 , a seedling planting mechanism 16 is drivably supported on one lateral side of the rear part of the planting drive case 14 . Of the three planting drive cases 14, in each of the planting drive cases 14 located on both lateral sides of the center planting drive case 14, seedling planting mechanisms 16 are provided on both lateral sides of the rear part of the planting drive case 14. is drivably supported. The seedling planting device 10 has five seedling planting mechanisms 16 . Above the front part of the planting frame 15, one seedling platform 17 for supplying seedlings to five seedling planting mechanisms 16 is provided. The seedling mounting table 17 is reciprocated left and right in conjunction with the seedling planting movement of the seedling planting mechanism 16 to supply the mat-like seedlings mounted on the seedling mounting table 17 to each seedling planting mechanism 16 . A sensor float 11 and two ground floats 12 are provided at the bottom of the planting frame 15 . The sensor float 11 is arranged in the center of the seedling planting device 10 in the width direction, and the two ground floats 12 are arranged on both lateral sides of the sensor float 11 . The sensor float 11 and the two grounding floats 12 touch the field and level the field when the seedling planting apparatus 10 is in the downward operation state. A ground leveling rotor mechanism 30 is provided in front of the planting frame 15 to level the field in front of the sensor float 11 and the two ground floats 12 .

As shown in FIGS. 2 and 3, a feed case 20 is provided in the middle portion of the frame member 13 in the width direction. As shown in FIG. 1, power from the engine 3 is input to the feed case 20 through a rotating shaft 21 and a transmission case 22 provided on the traveling machine body, and a rotating shaft 23 extending from the transmission case 22 to the feed case 20. be done. As shown in FIG. 2, power input to the feed case 20 is transmitted through an output case 24 connected to the feed case 20 and a power transmission case 25 connected to the output case 24 and the planting drive case 14. Input to each planting drive case 14 . The seedling planting mechanism 16 is driven by the power input to the planting drive case 14, picks up seedlings for planting from the mat-like seedlings placed on the seedling platform 17, and places the picked seedlings for planting on the field. The seedlings are conveyed downward to the seedling base 17 and planted. The seedlings are planted by the two seedling planting mechanisms 16 supported by the left planting drive case 14 located on the left lateral side of the central planting drive case 14, and the ground is leveled by the leveling rotor mechanism 30 in the field. Further, the ground is leveled by the grounding float 12 located on the left lateral side of the sensor float 11 . Seedlings are planted by one seedling planting mechanism 16 supported by the central planting drive case 14 in a field leveled by the ground leveling rotor mechanism 30 and further leveled by the sensor float 11 in the field. The seedlings are planted by the two seedling planting mechanisms 16 supported by the right planting drive case 14 located on the right lateral side of the center planting drive case 14, and the ground is leveled by the leveling rotor mechanism 30 in the field. In addition, it is performed on the ground leveled by the right ground float 12 .

[Regarding the configuration of the ground leveling rotor mechanism]
As shown in FIG. 4 , the leveling rotor mechanism 30 has a rotor support shaft 31 provided in front of the sensor float 11 and the left and right ground floats 12 so as to extend in the width direction of the traveling body. That is, the rotor support shaft 31 is positioned in front of the sensor float 11 , in front of the ground float 12 positioned on the left lateral side of the sensor float 11 , and in front of the ground float 12 positioned on the right lateral side of the sensor float 11 . are set across. As shown in FIG. 2 , a support frame 32 extending in the width direction of the seedling planting device 10 is provided in front of the frame member 13 . The support frame 32 is supported by the frame members 13 via connecting members 33 that are connected to the support frame 32 and the frame members 13 . Support members 34 are extended forward from a plurality of positions of the support frame 32 in the width direction of the seedling planting apparatus 10 . As shown in FIG. 4 , the rotor support shaft 31 is rotatably supported by the support member 34 . A leveling rotor portion 35 rotates relative to a portion of the rotor support shaft 31 positioned in front of the left ground float 12 and a portion of the rotor support shaft 31 positioned in front of the right ground float 12 . is set to disabled. A small-diameter ground leveling rotor portion 36 is supported on a portion of the rotor support shaft 31 positioned in front of the sensor float 11 so as not to rotate relative to the rotor support shaft 31 . The outer diameter of the small-diameter ground leveling rotor portion 36 is set smaller than the outer diameter of the ground leveling rotor portion 35 . The small-diameter ground leveling rotor portion 36 has a ground leveling ridge (not shown) provided on the outer peripheral portion of the small-diameter ground leveling rotor portion 36 in a state of extending in the direction along the rotor support shaft 31 . The ground leveling ridges are provided at a plurality of locations in the circumferential direction of the outer peripheral portion of the small-diameter ground leveling rotor portion 36 .

As shown in FIG. 4 , the pair of ground leveling rotor portions 35 located in front of the left ground float 12 and in front of the right ground float 12 are arranged side by side in the axial direction of the rotor support shaft 31 . It is composed of a plurality of ground leveling rotor portion constituents 35 a attached to the rotor support shaft 31 . The size X in the axial direction of the rotor support shaft 31 of the ground leveling rotor portion structure 35a is set to a size equal to the divisor of the value of the distance Y between the rows of seedlings. In the present embodiment, the seedling planting row spacing Y is set to 300 mm, and the size X of the leveling rotor portion constituent 35a is set to 75 mm, but the present invention is not limited to this. For example, when the seedling planting row spacing Y is set to 300 mm, the size X of the ground leveling rotor portion constituent 35a may be set to 50 mm, 150 mm, or 300 mm. When the seedling planting row spacing Y is set to 250 mm, the size X of the ground leveling rotor portion constituent 35a is preferably set to 50 mm, 125 mm, or 250 mm. The outer diameter of the small-diameter ground leveling rotor portion 36 is set smaller than the outer diameter of the pair of ground leveling rotor portions 35 .

As shown in FIG. 4 , an input portion 37 for inputting power for driving the rotor support shaft 31 is formed only at one position in the axial direction of the rotor support shaft 31 . More specifically, the input portion 37 is formed at a portion of the rotor support shaft 31 between the pair of ground leveling rotor portions 35 . An input shaft 37 a of the input portion 37 and a power take-off shaft 22 a of the transmission case 22 provided at the rear portion of the traveling machine body are interlocked by a rotating shaft 38 . In this embodiment, the input portion 37 is formed at a portion between the pair of ground leveling rotor portions 35 of the rotor support shaft 31, but is not limited to this. For example, it may be formed at a portion of the rotor support shaft 31 on the side where the end of the rotor support shaft 31 is located with respect to the leveling rotor portion 35 .

In the ground leveling rotor mechanism 30, the power input from the engine 3 to the transmission case 22 is input to the input portion 37 through the rotating shaft 38, the rotor support shaft 31 is driven by the input power, and the pair of ground leveling rotors 35 and A small-diameter ground leveling rotor portion 36 is driven by the rotor support shaft 31 . A portion of the field where the grounding float 12 touches the ground is leveled by the ground leveling rotor portion 35 , and a portion of the field where the sensor float 11 touches the ground is leveled by the small diameter leveling rotor portion 36 .

[Regarding the configuration of the lifting control of the seedling planting mechanism]
As shown in FIGS. 2 and 4, the front end 11f of the sensor float 11 is located forward of the front ends 12f of the pair of ground floats 12 in plan view, and the front ends 11f of the sensor float 11 It is provided in the lower part of the planting frame 15 so as to be positioned in front of the rear end 35r of the leveling rotor portion 35 positioned in front of each of the pair of ground floats 12 . As shown in FIG. 5, a bracket 40 provided at the rear end of the sensor float 11 and a support arm 41 are connected by a connecting shaft 42 so as to be relatively rotatable. The support arm 41 extends from a float support shaft 43 supported by the planting frame 15 so as to extend in the lateral width direction of the seedling planting apparatus 10 . The sensor float 11 is supported by the planting frame 15 so as to be able to swing vertically with respect to the planting frame 15 with the lateral axis P of the connecting shaft 42 as a swing fulcrum. When the height of the seedling planting device 10 with respect to the field changes, the front end of the sensor float 11 swings up and down with respect to the planting frame 15 with the horizontal axis P as the swinging fulcrum due to the ground reaction force acting on the sensor float 11 . move. By knowing the swing angle of the sensor float 11 with respect to the planting frame 15, the height of the seedling planting device 10 with respect to the field can be known. That is, the sensor float 11 can detect the height of the seedling planting device 10 with respect to the field.

As shown in FIG. 5 , a bracket 44 provided at the front end of the sensor float 11 and an operation arm 45a provided swingably on a detection sensor 45 are interlocked by an interlocking rod 46 . The detection sensor 45 consists of a rotary potentiometer and is supported on the planting frame 15 . A detection sensor 45 and a control device 47 are connected. The detected height of the sensor float 11 is converted into an electric signal by the detection sensor 45 , and the converted electric signal is input to the control device 47 . The control device 47 is linked to the operating valve 48 of the lifting cylinder 9a. The control device 47 is composed of a microcomputer and has an elevation control section 49 . The elevation control unit 49 is based on the electric signal from the detection sensor 45 so as to move the elevation cylinder 9a up and down so that the detected height of the sensor float 11 is positioned within the set detection range set as the set seedling depth. to control the operation valve 48.

Even if the traveling machine body tilts back and forth due to the front wheels 1 and the rear wheels 2 entering a concave part of the traveling surface or riding on a convex part, or the height of the traveling machine body with respect to the traveling surface changes, the sensor By controlling the elevation cylinder 9a by the elevation control unit 49 based on the detected height of the float 11, the seedling operation can be performed while maintaining the seedling depth of the seedling planting device 10 at the set depth.

[Regarding the configuration of the fertilizing device]
As shown in FIG. 1, the fertilizing device 50 includes a fertilizer tank 51 that stores powdery fertilizer, a delivery mechanism 52 that is connected to the lower part of the fertilizer tank 51 and delivers the fertilizer from the fertilizer tank 51, and the delivery mechanism 52. and a connected blower 53 . Five fertilizing hoses 57 are extended from the delivery mechanism 52 toward the seedling planting device 10 . Fertilizer fed out by the feeding mechanism 52 is supplied to each of the five fertilizing hoses 57 by the conveying air from the blower 53 .

As shown in FIG. 3, the ends of the five fertilizing hoses 57 on the side of the seedling planting device are connected to five ditch fertilizer applicators 56, respectively. The five ditch fertilizer applicators 56 are arranged such that one ditch fertilizer applicator 56 corresponds to each of the five seedling planting mechanisms 16, as shown in FIGS. ground float 12 or sensor float 11. Each grooving fertilizer 56 forms a ditch in the field on the lateral side of the seedling planting position by the seedling planting mechanism 16, and supplies fertilizer from the fertilizing hose 57 to the formed ditch.

As shown in FIG. 3, two fertilizing hoses 57 separately connected to two grooving fertilizers 56 supported by the left ground float 12 are connected to each of the fertilizing hoses 57, respectively. An air vent pipe 55 for extracting air from the fertilizing hose 57 is connected to a fertilizing hose 57 connected to one ditch fertilizer applicator 56 supported by the sensor float 11 . One air vent tube 54a for three left rows is connected to the three air vent tubes 55, and the carrier air extracted by the three air vent tubes 55 is gathered into the air by the one air vent tube 54a. discharged to Two fertilizing hoses 57 separately connected to two grooving fertilizers 56 supported by the right ground float 12 are each connected to an air vent pipe 58 for extracting air from the fertilizing hoses 57. . A single air vent tube 54b for right two lines is connected to the two air vent tubes 58, and the carrier air extracted by the two air vent tubes 58 is collected in the air by the single air vent tube 54b. discharged to The air vent tubes 54a for the left three rows and the air vent tubes 54b for the right two rows are arranged so as to be divided into left and right sides with respect to the left and right central portion of the seedling planting apparatus 10. As shown in FIG.

[Another embodiment]
(1) In the above-described embodiment, the seedling planting device 10 capable of planting five rows was used, but the seedling planting device 10 may be configured to be capable of planting four rows or less or six rows or more.

(2) In the above-described embodiment, an example in which the small-diameter ground leveling rotor portion 36 is provided has been shown, but the small-diameter ground leveling rotor portion 36 may not be provided.

(3) In the above-described embodiment, the input portion 37 is provided at a portion between the ground leveling rotor portions 35 of the rotor support shaft 31 . It may be provided on the side where the end of the rotor support shaft 31 is located. Moreover, although the example which employ|adopted the input part 37 by which motive power is input from the traveling body was shown, it may input from the feed case 20. FIG.

INDUSTRIAL APPLICABILITY The present invention can be applied to riding-type rice transplanters capable of planting seedlings of four rows or less or six rows or more.

REFERENCE SIGNS LIST 10 seedling planting device 11 sensor float 11f front end of sensor float 12 grounding float 12f front end of grounding float 16 seedling planting mechanism 30 ground leveling rotor mechanism 31 rotor support shaft 35 leveling rotor section 35a leveling rotor section structure 35r behind leveling rotor section End 36 Small-diameter leveling rotor section 37 Input section X Size of leveling rotor section structure Y Distance between rows for planting seedlings

Claims (2)

a running body,
a seedling planting device supported so as to be vertically operable at the rear part of the traveling machine body;
The seedling planting device
A sensor float that is grounded on the field to detect the height of the seedling planting device with respect to the field and level the field; a seedling planting mechanism for planting seedlings in a field leveled by the sensor float; a seedling planting mechanism for planting seedlings in the leveled field by the grounding floats on both lateral sides; a drivable grading rotor mechanism for grading the field in front of the lateral ground floats;
The ground leveling rotor mechanism is
A rotatably drivable rotor support shaft provided in front of the sensor float and the ground contact floats on both lateral sides and extending in the lateral width direction of the fuselage; A pair of ground leveling rotor portions distributed to the front portion and provided so as not to rotate relative to each other, and only one portion of the rotor support shaft between the pair of ground leveling rotor portions in the axial direction of the rotor support shaft. an input portion for receiving power for driving the rotor support shaft; a small-diameter grading rotor portion smaller than the outer diameter of the pair of grading rotor portions ;
In a plan view, the front end of the sensor float is positioned forward of the front ends of the ground floats on both lateral sides, and the front end of the sensor float is positioned forward of the rear ends of the pair of ground leveling rotors. ,
The input part and the small-diameter ground leveling rotor part are arranged along the lateral width direction of the machine body in a region of the rotor support shaft between the pair of ground leveling rotor parts and in front of the sensor float. machine. The pair of ground leveling rotor sections are configured by a plurality of ground leveling rotor section constituents arranged in the axial direction of the rotor support shaft and mounted on the rotor support shaft,
2. The riding-type rice transplanter according to claim 1 , wherein the size of the ground leveling rotor assembly in the axial direction is set equal to a divisor of the distance between rows of seedlings.

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