JP2011160692A - Seedling transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seedling transplanter having a land-leveling rotor, and capable of securing the efficiency of seedling-transplanting operation including transplantation at the edge of a field by effectively leveling the roughness of the field surface accompanied by the turning of a machine body at the edge of the field. <P>SOLUTION: The seedling transplanter is equipped with a supporting machine body (2) equipped with a traveling part (11) for traveling in the field, receiving a traveling power through a transmission part (18), a seedling-transplanting part (4) installed in the rear part thereof so as to be lifted and lowered, and carrying out the transplantation of seedling stocks, and the land-leveling rotors (27a and 27b) for leveling the field surface by the rotating action over the whole transplanting width at the position just before the seedling-transplanting part (4). The land-leveling rotors (27a and 27b) are equipped with a transmission supporting part (72) for transmitting the speed-changed power from the transmission part (18) so as to be supported by the side of the supporting machine body (2) positioned at the front side. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a seedling transplanting machine that performs seedling planting work in a seedling planting part while leveling unevenness of a field scene at a front side position of a seedling planting part provided at a rear part of a working machine body with a leveling rotor.

In the seedling transplanter shown in the cited references 1 and 2, a working machine capable of running on a field, a leveling rotor, and a seedling planting unit are arranged in this order, and the leveling rotor and the seedling planting unit are integrally supported by ascending and descending. At the time of planting, both of them are moved down to the planting field scene position and both are operated, and the seedling planting part transplants the seedlings while the front leveling rotor smoothes the unevenness of the field scene by leveling operation, During planting, for example, when turning around at the end of the field, both operations are stopped and lifted up to the non-working position so that the reciprocating planting work in the field section can be efficiently carried out, and the next step is the field edge. It is intended to perform the round planting work along.

JP 2009-118778 A JP-A-2005-124442

However, tire turning marks remain at the end of the field when turning the fuselage, and when turning around at the end of the field, the ground leveling rotor may not be able to level the turning marks of the tires and leave unevenness in the field. At the concave part of the tire turning trace, the seedling planting becomes shallower and the seedling becomes easier to be washed away by water flow, and at the convex part the seedling planting becomes deeper, it becomes difficult to grow by entering the soil to the stem part, and at the end of the field There was a problem that the efficiency of the seedling planting work was reduced.
In addition, since the ground leveling rotor rotates as a whole and performs uniform leveling operation over the entire travel width, it is not possible to respond partially depending on the field conditions and work conditions. There was a problem that a stock loss due to damage occurred or the planted seedlings were washed away.

The problem to be solved is that, in a seedling transplanter equipped with a rear lifting type seedling planting part on a support body capable of traveling in the field and equipped with a leveling rotor immediately before the seedling planting part, it is possible to turn the body at the field end. By effectively leveling the accompanying field scene roughening, it is possible to secure the efficiency of seedling planting work including the field edge planting, and to cope with the partial roughening of the field finely. Is to provide a machine.

According to the first aspect of the present invention, the working machine body (2) is provided with left and right traveling wheels (11, 11) that receive driving force from the left and right transmission cases (18, 18) and rotate to drive the work machine body (2). A pair of left and right leveling rotators (27a, 27a) for leveling the field scene at the front side of the seedling planting part (4) are provided so that a seedling planting part (4) for planting seedlings can be moved up and down at the rear. In the provided seedling transplanting machine, the left and right transmission cases (18, 18) individually transmit driving force to the left and right leveling rotary bodies (27a, 27a) and support the left and right leveling rotary bodies (27a, 27a). A seedling transplanting machine characterized in that left and right transmission support members (72, 72) were provided.

The seedling transplanting machine supports the leveling rotator (27a, 27a) at the front side position of the seedling planting part (4) via the transmission support member (72, 72) and from the transmission support member (72, 72). By supplying driving force to the left and right leveling rotators (27a, 27a), the left and right leveling rotators (27a, 27a) can be grounded at any time regardless of the vertical movement of the seedling planting part.

In the invention of claim 2, the left and right leveling rotators (27a, 27a) are respectively provided with base portions of leveling transmission cases (73, 73), between the left and right of the left and right leveling rotators (27a, 27a) and The seedling transplanter according to claim 1, wherein a center leveling rotating body (27b, 27b) is provided on each end side of the leveling transmission case (73, 73).
The seedling transplanting machine is provided with a center leveling rotary body (27b, 27b) via a leveling transmission case (73, 73) that transmits driving force from the left and right leveling rotary bodies (27a, 27a). The leveling operation can be performed by stopping only the left or right side of the leveling rotator (27a, 27a) and the center leveling rotator (27b, 27b) or by making a difference between the left and right rotational speeds.

According to a third aspect of the present invention, left and right transmission support members (72, 72) for supplying driving force to the left and right ground leveling rotary bodies (27a, 27a) are provided on the rear side of the left and right transmission cases (18, 18). The seedling transplanter according to claim 2, wherein drive shafts (11a) for pivotally mounting the left and right traveling wheels (11, 11) are provided on the left and right sides of the left and right transmission cases (18, 18), respectively. It was a machine.
The seedling transplanter can supply driving force to the left and right leveling rotating bodies (27a, 27a) and the left and right traveling wheels (11, 11) from the left and right transmission cases (18, 18).

According to the first aspect of the present invention, the left and right leveling rotary bodies (27a) are transmitted by the transmission support members (72, 72) that transmit the driving force from the left and right transmission cases (18, 18) to the left and right leveling rotary bodies (27a, 27a). 27a), and the left and right leveling rotary bodies (27a, 27a) are arranged at the front side position of the seedling planting part (4), so that The leveling rotator (27a, 27a) can be grounded at any time, and the field scene is leveled regardless of the field conditions such as soil quality and depth of the field, so that the seedlings can be surely planted and planted Can be prevented from growing in another place due to water flow and the occurrence of stock loss, and post-weeding operations, chemical spraying operations such as agricultural chemicals, and harvesting operations of harvested products can be performed efficiently.
Moreover, even if the seedling planting part (4) is raised when turning at the field end, the left and right leveling rotators (27a, 27a) continue the leveling operation while being in contact with the field scene. (27a, 27a) Since the turning marks of the field end tires generated during the vehicle turn can be leveled and the unevenness of the field scene can be leveled, the seedling planting work at the field end is efficiently performed, The seedlings planted in the recesses of the tire swirl traces are lifted, and the seedlings are washed away by water flow to prevent them from growing in other places and the occurrence of missing stocks. Scattering work, harvesting work, etc. are performed efficiently.
Furthermore, since the seedling is planted up to the stem portion on the convex portion of the turning trace of the tire and it is possible to prevent the sun from being hit easily and causing poor growth, the yield of the harvest is stabilized.

In addition to the effect of the invention described in claim 1, the invention described in claim 2 is the center leveling rotation through the leveling transmission case (73, 73) that transmits the driving force from the left and right leveling rotating bodies (27a, 27a). By providing the body (27b, 27b), it is possible to stop only one of the left and right sides, or to perform a leveling operation with a difference between the left and right rotation speeds, so the state of the field scene during planting work In addition, it is possible to select an appropriate acclimation work in accordance with the work conditions such as the work speed, the number of seedlings, and the like, and the work efficiency is improved.

In addition to the effect of the invention described in claim 2, the invention described in claim 3 can be applied to the left and right leveling rotating bodies (27a, 27a) and the left and right traveling wheels (11, 11) from the left and right transmission cases (18, 18). By supplying the driving force, the transmission system can be simply configured, so that the number of components is reduced and the maintainability is improved.

Side view of seedling transplanter of application example of the present invention Top view of the seedling transplanter in Fig. 1 Enlarged side view of seedling planting part Plan view of the lower part of the seedling planting part Configuration development diagram of transmission system of leveling rotor Expanded longitudinal sectional view (a) and side view (b) of the leveling rotor Top view of wave-break plate mounting part Travel system hydraulic circuit diagram Plan view of main part of leveling rotor Rotor control flowchart Rotor control block diagram Side view (a), main part plan view (b) and (c) main part rear view of rear wheel cleaning part

Embodiments specifically configured based on the above technical idea will be described below with reference to the drawings.
The seedling transplanting machine to which the leveling rotor of the present invention is applied, as shown in FIGS. 1 and 2, respectively, is a side view and a plan view, respectively, and a traveling part composed of left and right front wheels 10, 10 and left and right rear wheels 11, 11. A transmission case 12 that transmits transmission power integrally with the engine 20, left and right front wheel final cases 13 and 13 that transmit and support the left and right front wheels 10 and 10, and left and right rear wheel gears that transmit and support the left and right rear wheels 11 and 11. A seedling planting unit that includes a transmission unit such as cases 18 and 18 and that constitutes the support body 2 so as to be able to run on the field, and is provided at the rear part of the support body 2 so as to be movable up and down by a lifting link 3 to plant seedlings. 4 and left and right side rotors 27a, 27a for leveling the farm scene by a rotating operation immediately before the seedling planting section 4, and a pair of left and right center centers between the left and right side rotors 27a, 27a. Configured with over data 27b, and 27b.

The left and right front wheel final cases 13 and 13 transmit and support the left and right front wheels 10 and 10 on the side of the transmission case 12, and the left and right rear wheel gear cases 18 and 18 The axles (11a, 11a) that are attached to the left and right sides are provided so as to protrude from the left and right sides of the machine body, and receive left and right shifting power from the transmission case 12, respectively. The seedling planting section 4 includes a transmission case 50 that receives power from the planting transmission shaft 26 at the rear of the machine body, and an operator supplies seedlings to the seedling mount 51 and seedlings arranged in parallel according to planting conditions. The seedlings placed by the planting device 52 are planted in the field.

The leveling rotors 27a and 27b include a plurality of leveling bodies on the rotor shafts 70a and 70a as shown in FIGS. 3 and 4, respectively, as an enlarged side view of the seedling planting part 4 and a plan view of the lower part of the seedling planting part. And left and right side rotors 27a, 27a, and left and right side rotors 27a, 27a and left and right bearings 70c, 70c arranged in parallel at the center of the front side of the fuselage, respectively. A pair of left and right center rotors 27b and 27b that are pivotally supported, and left and right side rotors 27a and 27a and left and right leveling chain cases 73 and 73 that connect and support the pair of left and right center rotors 27b and 27b. The leveling chain cases 73 and 73 are components that receive driving force from the left and right side rotors 27a and 27a and supply the driving force to the center rotors 27b and 27b. Although not shown in the drawings, a driving sprocket, driven sprocket, tension It is equipped with a sprocket and transmission chain.
In addition to the above, a clutch mechanism may be incorporated in the leveling chain cases 73, 73 so that transmission to the center rotors 27b, 27b can be switched.

The transmission systems of the left and right side rotors 27a and 27a and the center rotors 27b and 27b are shown in FIG. 5 in a development view of the structure and in FIG. 9 in a plan view. The bases of the drive shafts 18a, 18a are attached, and the ends of the left and right drive shafts 18a, 18a are attached to the front side of the body of the left and right rear wheel gear cases 18, 18. And the base part of the left and right leveling drive shafts 72 and 72 which transmits a driving force to the left and right side rotors 27a and 27a is provided on the rear side of the left and right rear wheel gear cases 18 and 18, and the left and right leveling drive shafts are provided. The first bevel gears 72v and 72v are respectively pivotally attached to the ends of 72 and 72, and the first bevel gears 72v and 72v are pivotally attached to the rotor shafts 70a and 70a of the left and right side rotors 27a and 27a. Mesh with.

Furthermore, the rear body side of the leveling chain cases 73, 73 is attached to the inner side ends of the left and right rotor shafts 70a, 70a, and the left and right support shafts 70c, 70c are mounted on the front side of the ground leveling chain cases 73, 73. By attaching the outer end portions, the left and right rear wheel gear cases 18 and 18 can supply driving force to the rear wheels 11 and 11, the left and right side rotors 27a and 27a, and the center rotors 27b and 27b.

The seedling transplanting machine provided with the left and right side rotors 27a, 27a and the center rotors 27b, 27b has the right and left side rotors 27a, 27a just before planting seedlings of the seedling planting unit 4 with the leveling drive shafts 72, 72. By supporting the center rotors 27b and 27b, the left and right side rotors 27a and 27a and the center rotors 27b and 27b remain in contact with the field scene even when the seedling planting part 4 is raised when turning at the end of the field. So you can evenly level the farmland regardless of the field conditions such as wet fields (fields with a lot of moisture in the soil) and Fukada (fields that are relatively deep from the surface to the bottom when water is applied). It is possible to prevent seedlings from being planted in the field, planted seedlings being washed away by water flow, growing in other places, and missing stocks. , Harvesting etc. crop is carried out efficiently.

Further, since the leveling operation can be continued by the left and right side rotors 27a, 27a and the center rotors 27b, 27b even when turning at the field end, the turning marks of the tires at the field end caused by turning the body are leveled. As a result, planting of seedlings at the end of the field can be performed efficiently, and the seedlings planted in the recesses of the turning marks of the tires can be lifted, so that the seedlings can be washed away by water flow and grow in other locations Is prevented, so that weeding work in the post-process, spraying of chemicals such as agricultural chemicals, and harvesting work of the harvest are efficiently performed.
In addition, since the seedling is planted up to the stem portion on the convex portion of the turning trace of the tire and it is possible to prevent the sun from being hit easily and causing poor growth, the yield of the harvest is stabilized.

Further, the seedling planting section 4 is provided with a frame for supporting the leveling rotor, and the left and right side rotors 27a and 27a and the center rotors 27b and 27b are compared with the conventional configuration in which the frame supports the left and right and center leveling rotors. Since the weights of the leveling drive shafts 72, 72, the left and right leveling chain cases 73, 73, etc. are not applied to the seedling planting part 4, the front / rear balance of the machine body is improved. While avoiding the situation where the front part is lifted up, it is possible to suppress the turning trace of the tire left in the field from becoming deeper by reducing the support load of the rear wheels 11, 11. It is prevented from floating and becoming poor growth.

Further, the left and right side rotors 27a, 27a and the center rotors 27b, 27b have a structure that is divided into left and right at the center in the left-right direction of the body, so that the field conditions such as soil quality and shallowness, work speed, planting interval, etc. Therefore, it is possible to stop transmission of the left and right side rotors 27a and the center rotor 27b by cutting off the transmission to the left and right leveling drive shafts 72 and 72, or to set the left and right leveling drive shafts 72 to 72. , 72 can be differentiated between the left and right sides of the side rotor 27a and the center rotor 27b, the left and right sides of the side rotor 27a, and the center rotor 27b. It is possible to respond flexibly to changes in work conditions and work efficiency.

Also, the driving force supply source for the left and right traveling wheels 11 and 11 is used as the driving force supply source for the left and right leveling drive shafts 72 and 72 that transmit the driving force to the left and right side rotors 27a and 27a and the center rotor 27b and 27. Since the left and right rear wheel gear cases 18 and 18 can be prevented from complicating the transmission system, the number of components is reduced and the maintainability is improved.

An increase / decrease in the number of rotations of the left and right side rotors 27a, 27a and the center rotors 27b, 27b having the above configuration will be described.
When planting seedlings in the field while the seedling transplanter goes straight through the field, the field scene at the seedling planting position is leveled by the left and right side rotors 27a, 27a and the center rotors 27b, 27b, and swivels at the field edge. When stopping and raising the seedling planting operation of the seedling planting unit 4 when turning, turning of the tire generated in the field by turning the seedling transplanter with the left and right side rotors 27a, 27a and the center rotors 27b, 27b By leveling the marks, the seedling planting part has a substantially uniform height, so that the seedling planting depth is determined to be approximately constant, and the seedlings are floated and drifted, or deeply planted. It prevents the growth failure.

Further, even when turning at the end of the field, the left and right side rotors 27a, 27a and the center rotors 27b, 27b are in contact with the field while driving and rotating. It is possible to prevent the seedlings from being floated and drifting or being planted deeply to cause poor growth.

Usually, seedling planting work by a seedling transplanter needs to secure the swivel space of the aircraft, so the end of the field is planted last. At this time, if the seedling transplanting machine has six lines as in the present case, the partial seedling (not shown) of the seedling planting device 52 inside the field among the right and left and center seedling planting devices 52, 52, 52 is cut off. Stop and plant with the seedling planting devices 52, 52 at the center and outside the machine.
The edge of the field is a place where it is difficult for the work implement or work tool to reach when digging with a cultivator or when plowing, and the soil quality tends to be harder than other places. When performing planting work at such a field end, it is necessary to work while suppressing the tire turning traces generated during turning of the seedling transplanter with the leveling rotors 27a and 27b.

  However, the convex part of the turning trace of the tire is hard, and it is not possible to suppress the soil and move the soil to the concave part with the rotation speed of the normal leveling rotors 27a and 27b. The seedlings were washed away by the wind and the seedlings were planted up to the stems and leaves on the convex parts, which caused poor growth due to lack of sunlight.

In order to solve this problem, as shown in the flowchart of FIG. 10 and the block diagram of FIG. 11, on / off sensors 201L, 201C, and 201R for detecting each on / off of the partial clutch (not shown) are provided. A control device 200 that receives signals from the sensors 201L, 201C, and 201R is provided. When any one of the on / off sensors 201L, 201C, 201R is interrupted, the control device 200 issues a signal for increasing the output to the left and right side rotors 27a, 27a of the left and right transmission cases 18, 18, The left and right side rotors 27a, 27a are rotated at high speed.
Further, when all the partial clutches are set to “ON” and all signals of the ON / OFF sensors 201L, 201C, 201R are received, the control device 200 reduces the output to the side rotors 27a, 27a of the left and right transmission cases 18, 18 A signal is emitted to return the left and right side rotors 27a, 27a to the normal rotational speed.
At this time, the rotation of the center rotors 27b and 27b rotating from the left and right side rotors 27a and 27a via the left and right leveling chain cases 73 and 73 increases and decreases in conjunction with the left and right side rotors 27a and 27a.

With the above configuration, even if the soil is hard, such as at the field edge, the left and right side rotors 27a and 27a and the center rotors 27b and 27b rotated at high speed are brought into contact with each other to push the convex portion into the concave portion at high speed. Since it can level, the unevenness of the field can be leveled more reliably, seedlings with shallow planting depth can be prevented from being washed away by water and wind, and seedling planting depth can be deepened. Too much is prevented.

On the other hand, in a place where the soil is soft except for the field edge, if the left and right side rotors 27a and 27a and the center rotors 27b and 27b are rotated at high speed, mud is raised and the visibility of the field scene is hindered. Since the muddy water spreading from side to side may swallow the seedling, the left and right side rotors 27a, 27a and the center rotor 27b, can be reduced by reducing the rotational speed of the left and right side rotors 27a, 27a and the center rotors 27b, 27b. 27b is prevented from rolling up mud, visibility of the field scene is less likely to deteriorate, the operator can visually check the seedling planting state, can identify the problem location, and prevent the seedling from being washed away by mud water it can.

(Rotor configuration)
As for the detailed configuration of the leveling rotors 27a and 27b, as shown in FIG. 6 in a longitudinal sectional view (a) and a side view (b), a plurality of frequency dividing plates 102, etc. A frequency dividing wheel 103 arranged at an angular interval is configured, and a plurality of frequency dividing wheels 103 are arranged adjacent to each other at a distance necessary for draining water, and are integrally formed by penetrating around the rotor shaft. To do.

The ground leveling rotors 27a and 27b configured in this way are formed inside the frequency dividing plate 102 as compared with the conventional configuration in which the disc 101 is arranged between the frequency dividing wheels of the frequency dividing plate 102 only. Since the length in the axial direction of the pocket can be ensured, it is possible to improve the removal of muddy water while ensuring the penetration of impurities.

(Wave prevention part)
As shown in FIG. 7, left and right wave breakers 111 and 111 for preventing waves generated by the rotation of the seven rotors 27 a and 27 b from being directed to the adjacent strips are provided at the lower part of the seedling planting part 4 and on both right and left sides. The planting drive shafts 52a and 52a of the seedling planting devices 52 and 52 on the left and right outer sides of the machine body are extended toward the wave preventing plates 111 and 111, and mud is formed on the outer ends of the planting drive shafts 52a and 52a. A turbine rotating shaft 113, which is attached to a water turbine 112 that promotes a rearward flow of the water, is axially attached, and the water turbine 112 is provided close to the inner side of the intermediate position between the wave preventing plates 111, 111.

With this configuration, when the water wheel 112 is rotated by receiving driving force from the planting drive shafts 52a and 52a, a water flow that flows mud rearward is generated. Because it can be sent to the rear of the aircraft, it is possible to prevent the lifted mud from resisting the aircraft and applying an extra load, enabling efficient work traveling, shortening the work time and saving fuel. .
In addition, since the lifted mud can be prevented from being applied to the planted seedling, the seedling is prevented from being buried in the mud and withering, and the yield of the harvest is stabilized.
Furthermore, by providing the left and right wave breakers 111, 111, it is possible to prevent this muddy water from flowing to the strip on the side where the seedling has already been planted, so that the seedling is prevented from being washed away by the muddy water flow, The yield is stable.

In addition, as shown in FIG. 7, it is good also as a structure which connects the seedling planting apparatuses 52 with the connection shaft 114, and attaches the waterwheel 112 to this connection shaft 114. As shown in FIG.
In the present application, the left and center seedling planting devices 52 and 52 and the center and right seedling planting devices 52 and 52 are respectively connected by a connecting shaft 114, and a water wheel 112 is axially attached to the left and right connecting shafts 114 and 114, respectively. The left and right water turbine rotating shafts 113, 113, the planting drive shaft 52a, and the left and right connecting shafts 114, 114 are provided between the left and right of the left and right wave preventing plates 111, 111 in a straight line in plan view. .
With the above configuration, mud lifted by the planting operation of the seedling planting devices 52, 52, 52 as well as mud pushed up by the left and right wave breakers 111, 111 can be flowed to the rear of the machine body. This prevents the seedlings that have been planted from being buried and withered, and the yield of the harvest is stabilized.

(Rear wheel cleaning department)
As shown in FIGS. 12 (a), (b) and (c), the left and right rear wheels 11, 11 are provided with the left and right transmissions in order to scrape off mud adhering between the lugs 11b. The left and right rotating cases 190 and 190 are attached to the rear portions of the cases 18 and 18 so as to face the rear side of the machine body, and the left and right rotating cases 190 and 190 are rotated by receiving driving force from the left and right transmission cases 18 and 18. The transmission shafts 191 and 191 are arranged. Then, the first mud drop bevel gears 191v and 191v are respectively attached to the rear end portions of the left and right transmission shafts 191 and 191 and are extended downward through the rear side of the left and right mud dropping frames 190 and 190. At the same time, second mud drops bevel gears 192v and 192v are attached to the upper ends of the left and right passive shafts 192 and 192, respectively, so as to be rotatable, and meshed with the first mud drop bevel gears 191v and 191v.

Further, left and right mud drops are attached to the lower end portions of the left and right passive shafts 192 and 192 by scraping mud adhering to the lugs 11b... Devices 194 and 194 are configured.

With the above configuration, it is possible to travel while mud adhering to the left and right rear wheels 11, 11 is dropped and dropped by the devices 194, 194. Therefore, the amount of mud that falls with traveling when leaving the field on the road is reduced. This can reduce the time required for the work of removing the dropped mud from the road, and the labor of the operator is reduced.

(Hydraulic circuit)
As shown in FIG. 8, the travel circuit is provided with a pilot relief 131, and when the pressure reaches a certain level or more, the surge absorber 133 leaks to the tank 132 for a certain period of time. When the flow rate changes in a short time and reaches a certain pressure, the relief valve 131 is opened and returned to the oil tank 132. Therefore, the hydraulic circuit is prevented from being damaged by surge pressure, and at the time of start / stop when the pressure is likely to increase. High pressure can be prevented and the shock at the time of starting and stopping can be alleviated.

In addition to the above description, it is as follows when it supplements about the whole detailed structure of the seedling transplanter to which this invention is applied.
As shown in FIGS. 1 and 2, the seedling transplanter 1 has a seedling planting portion 4 mounted on the rear side of a traveling vehicle body 2 that is a support body so as to be movable up and down via a lifting link device 3. A main body portion of the fertilizer application device 5 is provided on the upper rear side of the vehicle body 2.

The traveling vehicle body 2 is a four-wheel drive vehicle including a pair of left and right front wheels 10 and 10 and a pair of left and right rear wheels 11 and 11 as drive wheels, and a transmission case 12 is disposed at the front of the fuselage. Front wheel final cases 13, 13 are provided on the left and right sides of the case 12, and the left and right front wheels are mounted on the left and right front wheel axles projecting outward from the respective front wheel support portions capable of changing the steering direction of the left and right front wheel final cases 13, 13. 10 and 10 are respectively attached. Further, the front end of the main frame 15 is fixed to the rear portion of the transmission case 12, and the rear wheel gear case 18 is supported by a rear wheel rolling shaft provided horizontally in the front and rear at the center of the rear end of the main frame 15. , 18 are supported so as to be able to roll freely, and rear wheels 11, 11 are attached to a rear wheel axle 11a projecting from the rear wheel gear cases 18, 18 in the lateral direction of the fuselage.

The engine 20 is mounted on the main frame 15, and the rotational power of the engine 20 is transmitted to the transmission case 12 via the belt transmission device 21 and the HST 23. The rotational power transmitted to the mission case 12 is shifted by a transmission in the case 12 and then separated into traveling power and external power to be extracted. A part of the traveling power is transmitted to the front wheel final cases 13 and 13 to drive the front wheels 10 and 10, and the rest is transmitted to the rear wheel gear cases 18 and 18 to drive the rear wheels 11 and 11. Further, the external take-out power is transmitted to a planting clutch case 25 provided at the rear part of the traveling vehicle body 2, and then transmitted to the seedling planting unit 4 by the planting transmission shaft 26, and also the fertilizer application device 5 by the fertilization transmission mechanism 28. Is transmitted to.

The upper part of the engine 20 is covered with an engine cover 30, and a seat 31 is installed thereon. A front cover 32 incorporating various operation mechanisms is provided in front of the seat 31, and a handle 34 for steering the front wheels 10 and 10 is provided above the front cover 32. The engine cover 30 and the front cover 32 have horizontal floor steps 35 on the left and right sides of the lower end. The floor step 35 is partly grid-shaped (see FIG. 2), and mud on the shoe of the worker walking through the step 35 falls on the field. The rear part on the floor step 35 is a rear step 36 that also serves as a rear wheel fender.
Further, on both the left and right sides of the front part of the traveling vehicle body 2, the spare seedling platforms 38, 38 on which the replenishment seedlings are placed can be pivoted to a position projecting laterally from the machine body and a position housed inside. Is provided.

The elevating link device 3 has a parallel link configuration, and includes one upper link 40 and a pair of left and right lower links 41, 41. These links 40, 41, 41 are pivotally attached to a rear-view portal-shaped link base frame 42 erected on the rear end of the main frame 15, and a vertical link 43 is connected to the other end. ing. And the connecting shaft 44 rotatably supported by the seedling planting part 4 is inserted and connected to the lower end part of the vertical link 43, and the seedling planting part 4 is connected so as to be able to roll around the connecting shaft 44. An elevating hydraulic cylinder 46 is provided between a support member fixed to the main frame 15 and a tip of a swing arm (not shown) integrally formed with the upper link 40, and the cylinder 46 is expanded and contracted by hydraulic pressure. The upper link 40 pivots up and down, and the seedling planting part 4 moves up and down while maintaining a substantially constant posture.

The seedling planting section 4 has a six-row planting structure, a transmission case 50 that also serves as a frame, a mat seedling, and a left and right reciprocating motion to supply seedlings one by one to the seedling outlet 51a of each row and for one horizontal row When all the seedlings are supplied to the seedling outlet 51a ..., the seedling mount 51 for transferring the seedling downward by the seedling feeding belt 51b ..., the seedling planting device 52 for planting the seedling supplied to the seedling outlet 51a ... in the field. A pair of left and right drawing markers (not shown) for drawing the aircraft course in the next stroke to the topsoil surface are provided. In the lower part of the seedling planting part 4, a center float 55 is provided in the center, and side floats 56, 56 are provided on the left and right sides thereof. When the aircraft is advanced with the center float 55 and the left and right side floats 56, 56 in contact with the mud surface of the field, the center float 55 and the left and right side floats 56, 56 slide while leveling the mud surface, A seedling is planted by the plurality of seedling planting devices 52... The center float 55 and the left and right side floats 56, 56 are rotatably mounted so that the front end side moves up and down in accordance with the unevenness of the soil surface of the field, and the vertical movement of the front part of the center float 55 during planting work. Is detected by an angle-of-attack sensor (not shown), and according to the detection result, the planting depth of the seedling is always adjusted by switching the hydraulic valve that controls the lifting hydraulic cylinder 46 to raise and lower the seedling planting unit 4. Keep constant.

The fertilizer application device 5 feeds the granular fertilizer stored in the fertilizer hopper 60 in a certain amount from a plurality of feeding portions 61... And the fertilizer is applied to the center float 55 and the left and right side floats 56 and 56 by the fertilizer hose 62. It guides to a fertilization guide (not shown) attached to both the left and right sides, and is dropped into a fertilization structure formed in the vicinity of the side portion of the seedling planting strip by a grooved body 69 provided on the front side of the fertilization guide. . Air generated by the blower 58 driven by the blower electric motor 53 is blown into the fertilizer hose 62 through the air chamber 59 that is long in the left-right direction, and the fertilizer in the fertilizer hose 62 is forcibly conveyed by wind pressure. It is supposed to be.

1 Seedling transplanter 2 Support body (running vehicle body)
3 Lifting link device 4 Seedling planting part 10 Front wheel (traveling part)
11 Rear wheel (travel section)
11a Drive shaft 12 Mission case 13 Front wheel final case 18 Rear wheel gear case (transmission case)
18a Drive shaft 20 Engine 25c Rotor shaft 27a Side rotor (left and right leveling rotor)
27b Center rotor (center leveling rotor)
52 Seedling planting device 70a Rotor shaft 70b Rotor shaft 70c Bearing 72 Transmission support 73 Chain case

Claims (3)

The work machine body (2) is provided with left and right traveling wheels (11, 11) that are driven to rotate by receiving driving force from the left and right transmission cases (18, 18), and planting seedlings at the rear of the work machine body (2). In the seedling transplanting machine provided with a pair of left and right leveling rotating bodies (27a, 27a) for providing a seedling planting part (4) to be moved up and down, and leveling the field scene at the front side position of the seedling planting part (4),
The left and right transmission support members (72) transmit the driving force to the left and right leveling rotators (27a, 27a) individually to the left and right transmission cases (18, 18) and support the left and right leveling rotators (27a, 27a). , 72) provided. The left and right leveling rotary bodies (27a, 27a) are respectively provided with the base side of the leveling transmission case (73, 73), and between the left and right of the left and right leveling rotary bodies (27a, 27a) and the leveling transmission case (73, 73). 73) The seedling transplanter according to claim 1, wherein a center leveling rotary body (27b, 27b) is provided on each of the end portions 73). The left and right transmission cases (18, 18) are provided with left and right transmission support members (72, 72) for supplying driving force to the left and right leveling rotary bodies (27a, 27a) on the rear side of the machine body. The seedling transplanter according to claim 2, characterized in that a drive shaft (11a) for pivotally mounting the left and right traveling wheels (11, 11) is provided on the left and right sides of the machine body.

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