JP2023110274A - seedling transplanter - Google Patents

Abstract

To provide a seedling transplanter which prevents the generation of abnormal sound by suppressing the vibration of a muffler and in which the hot air of the muffler is hardly conducted to a fuel tank in order to solve such problems that the muffler provided in an engine is vibrated and the abnormal sound is generated since a rice transplanter has the large machine body vibration in the time of rice-planting work, and the hot air of the muffler is easily conducted to the fuel tank since the muffler is arranged below the fuel tank in a conventional walking type rice transplanter in which a control handle provided in the rear part of a machine body is gripped by a worker, which advances by rotationally driving drive wheels with the drive force of the engine mounted on the front part of the machine body and plants seedlings in a farm field.SOLUTION: In a seedling transplanter which transmits the power of an engine 2 to a main transmission case 3 and advances with drive wheels that are driven to rotate with the power of the main transmission case 3, a muffler 56 provided in the engine 2 is connected to a support frame 43 whose base part is fixed to the main transmission case 3.SELECTED DRAWING: Figure 4

Description

The present invention relates to a seedling transplanter for planting seedlings in fields.

Conventionally, there has been a walking-type rice transplanter in which an operator grips an operation handle provided at the rear of the machine, and the driving force of an engine mounted at the front of the machine drives the wheels to rotate and move forward to plant seedlings in the field. There is (for example, see Patent Document 1).

JP-A-10-119597

During the rice transplanting work, the rice transplanter vibrates greatly, causing the muffler on the engine to vibrate and generate abnormal noise. In addition, since the muffler is arranged below the fuel tank, the heat of the muffler is easily transferred to the fuel tank.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a seedling transplanter that suppresses the vibration of the muffler to prevent the occurrence of abnormal noise and that makes it difficult for the hot air from the muffler to be transmitted to the fuel tank. and

The invention according to claim 1 is a seedling transplanter that transmits the power of an engine 2 to a main transmission case 3 and advances by driving wheels 5 that are driven and rotated by the power of the main transmission case 3. The muffler provided in the engine 2 56 is connected to a support frame 43 whose base is fixed to the main transmission case 3.

According to the first aspect of the invention, since the muffler 56 provided in the engine 2 is connected to the support frame 43 whose base is fixed to the main transmission case 3, the vibration of the muffler 56 can be prevented.

The invention according to claim 2 is the seedling transplanter according to claim 1, wherein the support frame 43 is provided with a rope guide 45 for guiding the recoil rope 40 of the recoil starter for starting the engine 2 .

The invention according to claim 3 is the seedling transplanter according to claim 2, wherein the rope guide 45 is a rope guide pulley 45 rotatably supported on the support frame 43 by a pivot shaft 46 .

According to the fourth aspect of the invention, there is provided a seedling transplanter which transmits the power of the engine 2 to the main transmission case 3 and advances by the drive wheels 5 which are driven and rotated by the power of the main transmission case 3. The fuel tank 38 and the fuel tank This seedling transplanter has a cover 58 provided between mufflers 56 arranged below a fuel tank 38 and a space between the fuel tank 38, the cover 58 and the muffler 56.例文帳に追加

The invention according to claim 5 is the seedling transplanter according to claim 4, wherein the bottom surface of the cover 58 is provided with a heat insulating material 58a.

The invention according to claim 6 is the seedling transplanter according to claim 4 or 5, wherein the left and right sides of the cover 58 protrude outward from the machine body more than the left and right sides of the bonnet cover 37 covering the engine 2 .

It is a side view of a rice transplanter showing an embodiment in the present invention. It is a front view of a rice transplanter showing an embodiment in the present invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a plane sectional view of the principal part of the rice transplanter which shows embodiment in this invention. It is a side view of the important section of a rice transplanter showing an embodiment in the present invention. It is a side view of the important section of a rice transplanter showing an embodiment in the present invention. It is a back sectional view of the principal part of the rice transplanter which shows other embodiment in this invention. It is a side view of a rice transplanter showing other embodiments in the present invention. It is a front view of a rice transplanter showing other embodiments in the present invention.

A rice transplanter, which is an embodiment of the seedling transplanter of the present invention, will be described with reference to the drawings. It should be noted that the following embodiment is merely an embodiment and does not limit the scope of the claims. In this specification, the left and right sides are referred to as the left side and the right side, respectively, in the forward direction of the rice transplanter, the forward direction is referred to as the front side, and the backward direction is referred to as the rear side.

First, the configuration and operation of a rice transplanter according to an embodiment of the present invention will be specifically described with reference to FIGS. 1 to 5. FIG.

1 and 2 are a side view and a front view of the rice transplanter 1. FIG. This rice transplanter 1 has an engine 2 as a prime mover provided at the front end of the machine body, a main transmission case 3 provided on the rear side of the engine 2, and running support members provided on the left and right sides of the main transmission case 3 respectively. driving wheels 5 as left and right traveling bodies driven by the power from the traveling transmission case 4; a main frame 6 extending rearward from the rear side surface of the main transmission case 3; A planted transmission case 7 fixed to the rear end, a rear frame 8 curved from the rear side of the planted transmission case 7 and extending obliquely rearward and upward, and a steering handle 9 attached to the rear end of the rear frame 8. I have it. A steering handle 9 is fixed to the upper end of the rear frame 8 .

Four seedling planting devices 10 are attached to the lower part of the planting transmission case 7, and a seedling platform 11 is provided on the front side of the rear frame 8 so as to be supported by the rear frame 8 so as to be horizontally movable. Therefore, this rice transplanter 1 has a four-row planting configuration in which four rows of seedlings are planted simultaneously in a field.

In addition, three ground leveling floats 12 are provided in the lower part of the machine body to contact the field, and the ground leveling floats 12 slide and level the field as the machine runs. Of the ground leveling floats 12, the center leveling float 12a in the left and right center of the machine body levels the planting positions of the two seedling planting devices 10 on the left and right inner sides, and the side level leveling floats 12b on both the left and right sides of the body level each one on the left and right outer sides. The planting position of the row seedling planting device 10 is leveled.

The front end of the center leveling float 12a is positioned forward of the front end of the side leveling float 12b, the front-rear length is longer than the side leveling float 12b, the lateral width is wider than the side leveling float 12b, and the ground contact area is wider than the side leveling float 12b. The center leveling float 12a and the side leveling float 12b are arranged at the same position in a side view, and are supported so as to be vertically rotatable about respective left-right fulcrum shafts 13. It is configured to move up and down following the movement.

In addition, the left and right drive wheels 5 are arranged at the left and right center positions between rows between the planting positions of the seedling planting devices 10 on the left and right inner sides and the planting positions of the seedling planting devices 10 on the left and right outer sides. Therefore, the center leveling float 12a is arranged between the left and right driving wheels 5, and the side leveling floats 12b are arranged on the left and right outer sides of the left and right driving wheels 5, respectively.

A drive pulley 2b is provided on the output shaft 2a of the engine 2, an input pulley 3b is provided on the input shaft 3a of the main transmission case 3, and a transmission belt 50 is wound around the drive pulley 2b and the input pulley 3b so that the power from the engine 2 is transmitted. It is transmitted inside the main transmission case 3 .

The main transmission case 3 contains a main clutch capable of cutting off all transmission to the driving wheel 5, the seedling planting device 10 and the seedling mounting base 11, and a transmission path for transmitting power from the main clutch to the driving wheel 5. and a transmission path to the seedling planting device 10 and the seedling mounting table 11; A planting clutch capable of disconnecting power transmission to the base 11 and switching gears meshing on the transmission path to the drive wheels 5 allow the gears to engage in a forward high speed state for road running, a forward low speed state for planting work, and gears. A transmission unit 51 that can shift gears by switching between four states of a neutral state and a reverse state in which transmission is not performed without transmission, and a left and right transmission unit that can switch the transmission to the left and right drive wheels 5 to the non-transmission state on the downstream side of the transmission of the transmission unit. Side clutches 52, 52 are provided.

Therefore, the power is transmitted to the left and right traveling output shafts 14 projecting left and right from the main transmission case 3 via the transmission portion 51 and the side clutches 52 , 52 . In addition, the travel output shaft 14 serves as a rotation axis for rotating the travel transmission case 4 up and down. By rotating the travel transmission case 4 in the vertical direction, an axle 15 provided at the rear end portion of the travel transmission case 4 is moved up and down to move the drive wheels 5 up and down.

The travel output shaft 14 projects into the travel transmission case 4 , and the chain transmission mechanism in the travel transmission case 4 transmits driving rotational power to the axle 15 .

Further, by the transmission of the planted clutch, it is transmitted into the planted transmission case 7 via the planted transmission shaft extending rearward from the main transmission case 3 . In addition, the engine 2 and the main transmission case 3 are arranged in front of the respective axles 15 of the left and right drive wheels 5, and the planting unit includes the planting transmission case 7, a plurality of seedling planting devices 10, and a seedling platform 11. are arranged behind the axles 15 of the left and right drive wheels 5, respectively.

A hydraulic pump 53 is fixed on the right side of the front part of the main transmission case 3, a hydraulic valve unit 54 is fixed on the rear part of the main transmission case 3, and a single-acting hydraulic lifting cylinder is mounted on the rear side of the hydraulic valve unit 54. 17 is fixed.

The hydraulic lifting cylinder 17 is arranged above the main frame 6 and has a cylinder rod 17a as a moving member that moves in the front-rear direction.

Therefore, when the hydraulic pressure from the hydraulic pump 53 is supplied to the hydraulic lifting cylinder 17 by switching the hydraulic valve unit 54, the cylinder rod 17a moves rearward. When the hydraulic pressure in the hydraulic lift cylinder 17 is switched to return to the main transmission case 3 serving as a hydraulic tank, the cylinder rod 17a moves forward due to the weight of the machine body.

A relay link member 18 serving as a relay member is rotatably connected to the rear end of the cylinder rod 17a via a vertical fulcrum shaft. The relay link member 18 is connected to the fulcrum shaft in the vertical direction at the center in the left-right direction, and has a symmetrical shape. A spring receiving portion is provided in the left-right central portion of the relay link member 18, and a compression spring 19 provided on the cylinder rod 17a is in contact with the spring receiving portion. Therefore, the compression spring 19 provides rotational resistance to the relay link member 18 about the fulcrum shaft, and in an unloaded state, the relay link member 18 is configured to rotate and return to the neutral position.

The rear ends of left and right connecting rods 20 are connected to the left and right ends of the relay link member 18 via left and right vertical connecting shafts. The front end of the connecting rod 20 is connected to left and right arms 21 fixed to the upper side of the travel transmission case 4 . Therefore, the ground contact load of the drive wheels 5 is received by the relay link member 18 via the travel transmission case 4 , the arm 21 and the connecting rod 20 .

Therefore, when the hydraulic valve unit 54 is switched to supply the hydraulic pressure from the hydraulic pump 53 to the hydraulic lift cylinder 17, the cylinder rod 17a moves rearward, the relay link member 18 moves rearward, and the relay link member 18 moves rearward. 18 pulls the left and right connecting rods 20 rearward through the connecting shaft, and rotates the left and right arms 21 rearward, thereby rotating the left and right traveling transmission cases 4 downward and driving the left and right driving wheels 5. moves down and the machine rises relative to the field. Conversely, when the hydraulic valve unit 54 is switched to return the hydraulic pressure in the hydraulic lifting cylinder 17 to the main transmission case 3, the left and right arms 21, the left and right connecting rods 20, and the relay link members are moved by the ground contact loads of the left and right driving wheels 5. 18 and the like, the cylinder rod 17a is returned forward, the left and right driving wheels 5 are moved upward, and the machine body is lowered with respect to the field.

In order for the left and right drive wheels 5 to follow the lateral inclination of the plowed field and the unevenness of the plowed field, the relay link member 18 tries to temporarily rotate around the fulcrum shaft against the compression spring 19. However, the compression spring 19 rotates the relay link member 18 to return to the neutral position, maintains the left-right rolling posture of the machine body, and prevents the left-right tilting posture of the machine body from becoming unstable.

The main transmission case 3 has a front width LA narrower than a rear width LC, the input shaft 3a being arranged in the narrower width portion, and the transmission shaft 3c being arranged in the wider width portion.

An input pulley 3b is provided on the input shaft 3a projecting to the left of the narrow front portion of the main transmission case 3, and a mounting spacer 55 is provided in a recess on the right side of the narrow front portion of the main transmission case 3. A hydraulic pump 53 is attached via and is driven on the right side of the input shaft 3a.

In addition, the projection of the mounting spacer 55 is inserted into the recess on the right side of the narrow portion of the front portion of the main transmission case 3 and fixed in a spigot configuration, and the projection of the hydraulic pump 53 is inserted into the recess on the right side of the mounting spacer 55. It is inserted and fixed in a spigot configuration, and the left end of the hydraulic pump 53 is axially engaged with the right end of the input shaft 3a.

A power transmission belt 50 is wound around the input pulley 3b and the drive pulley 2b to transmit power from the engine 2 to the input shaft 3a.

The seedling planting device 10 and the seedling mounting table 11 are operated by power from the planting transmission case 7 .

The seedling mounting base 11 is supported by left and right connecting members 23 from both left and right ends of a left and right moving shaft 22 that protrudes left and right from the planting transmission case 7 and moves left and right. , the seedlings are supplied one by one to the seedling opening provided in each row of the seedling receiving plate 24 .

A laterally moving rail 25 is fixed to the upper part of the seedling loading table 11, and the laterally moving rail 25 is guided by a support roller 26 supported from the upper part of the rear frame 8 so that the lateral movement is possible. Supported.

Therefore, the seedling mounting table 11 is supported by the seedling receiving plate 24 at its lower portion so as to be able to move left and right, and is supported at its upper portion by the support roller 26 so as to be able to move left and right. It is configured to move back and forth to the left and right.

In addition, the seedling loading table 11 is provided with a seedling feeding belt 27 for each row for transporting the seedlings to the seedling port side (lower side) at the lateral movement end. The seedling feeding belt 27 is operated by the power from the planting transmission case 7, and transfers the mat seedlings by one seedling at the left and right moving ends of the seedling mounting table 11 to supply the seedlings to the seedling opening.

The seedling planting device 10 is attached to the lower part of the planting transmission case 7 and is a crank type operated by the power from the planting transmission case 7, and the separation claw 10a scrapes the seedlings on the seedling opening and scrapes them off. The extruding tool 10b pushes out the seedlings toward the field to plant the seedlings in the field.

A main clutch lever 28 capable of disconnecting power transmission to the driving wheel 5, the seedling planting device 10 and the seedling planting platform 11 is provided on the front side of the steering handle 9 and on the rear side of the seedling platform 11. and a planting elevating lever 29 for switching the oil passage of the hydraulic valve unit 54 to cut off transmission to the seedling mounting table 11 and operate the hydraulic elevating cylinder 17 .

The main clutch lever 28 can be operated between two operating positions, an on position and a disengaged position, and operates the main clutch in the main transmission case 3 to switch between a transmission state and a non-transmission state.

The planting lifting lever 29 is configured to be operated in four operating positions, namely, a planting position, a lowered position, a neutral position, and a raised position. While switching between the driving state and the non-driving state, the hydraulic lift cylinder 17 is actuated to vertically move the left and right drive wheels 5 . That is, when it is operated to the planting position, the planting clutch is put into a transmission state to operate the seedling planting device 10 and the seedling mounting table 11, and the left and right driving wheels 5 receive a ground load due to the self weight of the machine body, thereby hydraulically raising and lowering. The hydraulic pressure in the cylinder 17 is returned to the main transmission case 3 to move the left and right drive wheels 5 upward, lowering the machine body and bringing the ground leveling float 12 into a grounded state. When operated to the lowered position, the seedling planting device 10 and the seedling mounting table 11 are stopped by disengaging the planting clutch while the machine body is lowered as described above. When operated to the neutral position, the operation of the hydraulic lifting cylinder 17 is blocked by blocking the oil passage to the hydraulic lifting cylinder 17 while the seedling planting device 10 and the seedling mounting table 11 are stopped as described above, and the operation of the hydraulic lifting cylinder 17 is fixed. Then, the left and right drive wheels 5 are fixed at arbitrary vertical positions to stop the lifting of the machine body. When operated to the raised position, hydraulic pressure is supplied to the hydraulic lifting cylinder 17 to move the left and right driving wheels 5 downward while the seedling planting device 10 and the seedling mounting table 11 are stopped as described above. , the machine body is lifted and the ground leveling float 12 is placed in a non-grounded state.

In addition, the vertical movement of the center leveling float 12a switches the oil passage of the hydraulic valve unit 54 via a rod connected to the front portion of the center leveling float 12a, and the front portion of the center leveling float 12a rises. When moved, hydraulic pressure is supplied to the hydraulic lift cylinder 17 to move the left and right drive wheels 5 downward.

Therefore, when the planting lift lever 29 is at the planting position and the lowered position, the center leveling float 12a touches the field and moves up and down, so that the left and right drive wheels move the center leveling float 12a to a desired front-to-rear posture. 5 moves up and down, and the elevation is controlled so that the airframe reaches a predetermined height above the ground.

On the front side of the control handle 9 and the seedling mount 11, there are a shift lever 30 for operating the shift section in the main transmission case 3, and a recoil rope 40 of a recoil starter provided in the engine 2, which extends toward the rear of the fuselage. A recoil knob 31 is provided at the end.

Left and right side clutch levers 32 are provided below the left and right handle grips 9a of the steering handle 9, and the left and right side clutch levers 32 are used to operate the left and right side clutches 52 in the main transmission case 3. there is

A planting depth adjusting lever 33 is provided on the left side of the rear frame 8 on the oblique front lower side of the operation handle 9, and the planting depth adjusting lever 33 and the planting depth adjusting lever 33 are integrally rotated by operating the planting depth adjusting lever 33. By rotating the planting depth adjusting shaft 34 that moves in the horizontal direction, each ground leveling float 12 is pivoted through each planting depth adjusting arm 35 that rotates integrally with the planting depth adjusting shaft 34 . By changing the vertical position with respect to the machine body of 13, the seedling planting depth by the seedling planting device 10 can be changed and adjusted. The pivot shaft 13 is welded and fixed to the planting depth adjusting arm 35 .

A seedling amount adjusting lever 36 is provided on the right side of the rear frame 8 on the oblique front lower side of the operation handle 9. By operating the seedling amount adjusting lever 36, the vertical position of the seedling receiving plate 24 with respect to the seedling planting apparatus 10 is adjusted. is changed to change and adjust the amount of seedlings taken per stock by the seedling planting device 10.例文帳に追加

A bonnet cover 37 is provided above the engine 2 and the main transmission case 3 . A fuel tank 38 is provided above the engine 2 .

An air cleaner 48 and a muffler 56 are arranged in the longitudinal direction behind the engine 2 and below the fuel tank 38 .

The air cleaner 48 communicates with an intake port of the engine 2 through an intake pipe and is fixed to the engine 2 so that the engine 2 takes in air through an air filter.

The muffler 56 communicates with an exhaust port of the engine 2 through an exhaust pipe 57, is fixed to the engine 2, and discharges exhaust gas to the outside of the machine.

A cover 58 that covers the exhaust pipe 57 and the muffler 56 is provided below the fuel tank 38 to prevent spilled fuel from splashing onto the exhaust pipe 57 and the muffler 56 when the fuel tank 38 is refueled.

A heat shielding sheet 58a as a heat shielding material is attached to the bottom surface of the cover 58, and a gap is provided between the cover 58 and the exhaust pipe 57 and the muffler 56. Heat is prevented from being transmitted directly to the cover 58. - 特許庁

A space is provided between the fuel tank 38 , the cover 58 , the exhaust pipe 57 and the muffler 56 so that the heat of the exhaust pipe 57 and the muffler 56 is not directly transmitted to the fuel tank 38 .

The left and right sides of the cover 58 protrude outward from the fuselage more than the left and right sides of the bonnet cover 37, so that hot air from the exhaust pipe 57 and the muffler 56 is guided to the left and right sides of the fuselage and discharged outward from the fuselage. Excessive temperature rise of the exhaust pipe 57 and the muffler 56 is suppressed.

The rear end of the cover 58 is bent upward to form a rising wall portion 58b. , the fuel falling on the cover 58 flows down to the right side of the fuselage.

The muffler 56 is connected to the upper part of the support frame 43, the base of which is fixed to the main transmission case 3, by means of bolts 44 to prevent vibration.

A rope guide pulley 45 as a rope guide is rotatably supported by a pivot shaft 46 in the middle of the support frame 43 . The rope guide pulley 45 guides the recoil rope 40 when the recoil rope 40 is pulled by the recoil knob 31 or when it is unwound toward the recoil starter. Therefore, since the rope guide pulley 45 guides the intermediate portion of the recoil rope 40, the recoil rope 40 can be routed toward the rear of the fuselage without interfering with other members of the fuselage.

A cylindrical cable guide 59 made of a heat shielding material is provided in the front part of the cover 58 to extend upward. , the cable can be held and heat shielded.

An engine base 60 is fixed to the front portion of the main transmission case 3 , and the engine 2 is fixed by inserting bolts 62 through elongated holes 61 provided in the upper surface of the engine base 60 .

A rear end of the upper surface of the engine base 60 is bent upward to form a rising surface 60a.

Therefore, by slightly loosening the bolt 62 and inserting a screwdriver or the like between the engine 2 and the rising surface 60a to move the engine 2 forward to adjust the tension of the transmission belt 50 and tightening the bolt 62, the transmission belt 50 tension can be easily adjusted. Moreover, the rising surface 60a functions as a rib, and the rigidity of the engine base 60 can be improved.

The engine base 60 has an internal space defined by left and right side walls, and weights 63 are placed in the internal space and fixed with bolts 64 from the left and right side walls. When turning the machine body in wet or deep fields, it is easy to lift the rear part of the machine body by holding the left and right handle grips 9a of the steering handle 9 in order to lower the front part of the machine body.

In order to improve the longitudinal balance of the airframe, the front part of the engine 2 protrudes further forward than the front part of the center leveling float 12a. Even if the front part of the machine body descends and touches the field, the front part of the center ground leveling float 12a contacts the main transmission case 3 so that the engine 2 and the engine base 60 are not subjected to impact load.

The driving pulley 2b, the input pulley 3b, and the transmission belt 50 are covered with a belt cover 65 on the outer side and the periphery thereof, so that they are protected from splashing mud and water from the field.

The belt cover 65 has a structure in which the inner cover body 65b is welded to the inner side of the outer cover body 65a to increase the strength.

Round holes 65c for attaching to the engine 2 are provided in the upper and front portions of the belt cover 65, and the upper and front portions of the belt cover 65 are fixed to the engine 2 by inserting bolts through the round holes 65c. A long hole 65d is provided in the rear portion of the belt cover 65 for attachment to the main transmission case 3, and bolts are inserted through the long holes 65d to fix the rear portion of the belt cover 65 to the main transmission case 3. .

The portion of the rear portion of the belt cover 65 where the long hole 65d is opened is a portion in which the outer cover body 65a and the inner cover body 65b are fixed by welding to increase the strength, and the strength of the long hole 65d portion can be efficiently increased.

The reason why the hole 65d for attaching the main transmission case 3 to the rear portion of the belt cover 65 is elongated in the longitudinal direction is that when the mounting position of the engine 2 on the engine base 60 is adjusted in the longitudinal direction, the engine 2 and the main transmission This is because the distance in case 3 changes, so that the change in the distance can be dealt with.

The hydraulic pump 53 sucks oil through a suction filter 66 provided inside the main transmission case 3 and sends pressure oil to the hydraulic valve unit 54 .

More specifically, the main transmission case 3 is provided with an oil supply port 67 on the left outer surface thereof. The fuel filler port 67 is closed. Therefore, the oil level in the main transmission case 3 is below the oil filler port 67 when the machine body is placed in a horizontal state.

An oil suction port 69 is provided on the right outer surface of the main transmission case 3 at a position slightly above the oil level (a position slightly above the oil supply port 67). The oil suction port 69 and the suction filter 66 communicate with each other via an oil passage 70 formed in the wall surface of the main transmission case 3 , and the oil suction port 69 and the hydraulic pump 53 communicate with each other via a suction hose 71 .

The hydraulic pump 53 and the hydraulic valve unit 54 are in communication via an oil feed pipe 72 .

The inner diameter of the oil passage 70 and the inner diameter of the suction hose 71 are larger than the inner diameter of the oil feed pipe 72 .

Therefore, the hydraulic pump 53 sucks the oil in the main transmission case 3 through the suction filter 66 , the oil passage 70 and the suction hose 71 and appropriately feeds the pressure oil to the hydraulic valve unit 54 through the oil feed pipe 72 .

At a position from above the rear part of the bonnet cover 37 to above the front part of the planting transmission case 7, there is provided a spare seedling stand 39 for placing four spare mat-like soil-covered seedlings in parallel in the lateral direction of the machine body. ing.

That is, the spare seedling mounting table 39 is detachably provided with bolts on the upper portions of the left and right spare seedling frames 41, 41 which are arch-shaped in side view.

The left and right spare seedling frames 41 , 41 have their front portions fixed to the upper portion of a support frame 42 provided at the front end portion of the main frame 6 , and their rear portions fixed to the upper portion of the planting transmission case 7 .

In this rice transplanter 1, the operator grasps the left and right handle grips 9a of the control handle 9, operates the planting lifting lever 29 to the planting position, lowers the machine body, puts the planting part in an operable state, and By operating the planting part while operating the clutch lever 28 to the on position and running the machine, four rows of seedlings are planted in the field at the same time.

When reaching the edge of the ridge of the field, the planting lifting lever 29 is operated to the raised position to stop the operation of the planting part, the left and right driving wheels 5, 5 are lowered to raise the machine body, and the side clutch lever on the inside of the turn. 32 is operated to disengage the side clutch of the drive wheel 5 on the inner side of the turn, and the machine body is turned.

Thereafter, the planting lift lever 29 is similarly operated to the planting position to carry out the planting work of the next step, and the seedlings are planted in the field. When traveling on the road, etc., the machine body is raised and the shift lever 30 is appropriately operated to drive the machine.

Next, mainly referring to FIGS. 6 to 8, the configuration and operation of the rice transplanter according to the embodiment of the present invention will be explained more specifically.

<Other embodiments>
(1) FIG. 6 shows another embodiment of the planting depth adjusting shaft 34 portion.

As described above, the planting depth adjusting lever 33 is provided on the left side of the rear frame 8 at the lower front side of the operating handle 9, and the planting depth adjusting lever 33 is operated to operate the planting depth adjusting lever. A horizontal planting depth adjusting shaft 34 that rotates integrally with 33 is rotated, and each leveling float 12 is adjusted via each planting depth adjusting arm 35 that rotates integrally with the planting depth adjusting shaft 34. By changing the vertical position of the rotation fulcrum shaft 13 with respect to the machine body, the seedling planting depth of the seedling planting device 10 can be changed and adjusted. The pivot shaft 13 is welded and fixed to the planting depth adjusting arm 35 .

In the embodiment shown in FIG. 6, the planting depth adjusting shaft 34 is made of an iron pipe material, and the base of each planting depth adjusting arm 35 is fixed by welding.

An iron round bar 34b having a washer 34a welded to one side end is inserted into the planting depth adjusting shaft 34 made of a pipe material from one side end of the planting depth adjusting shaft 34. A washer 34c is fitted to a portion protruding from the other end of the depth adjusting shaft 34, and the split pin 34d prevents the shaft from coming off.

That is, since the engine 2 mounted on the engine base 60 at the front of the fuselage protrudes toward the front of the fuselage, the center of gravity is moved forward, and the front-rear balance of the fuselage is improved. must have a balance weight attached to the rear of the fuselage.

In the embodiment shown in FIG. 6, the iron round bar 34b is inserted into the planting depth adjusting shaft 34 to form the balance weight.

That is, the engine 2 is mounted on the front part of the fuselage, the steering wheel 9 is provided on the rear part of the fuselage, the drive wheels 5 are provided between the engine 2 and the steering wheel 9 when viewed from the side of the fuselage, and the planting depth adjusting lever 33 is located on the lower part of the fuselage. In a seedling transplanter provided with a ground leveling float 12 whose rear part is vertically adjusted by a planting depth adjusting shaft 34 by operation, the planting depth adjusting shaft 34 is made of a pipe material, and the planting depth adjusting shaft This seedling transplanter has a round bar 34b as a balance weight inside 34.

Therefore, since the round bar 34b is provided as the balance weight in the planting depth adjusting shaft 34, the rear balance weight can be attached with a simple structure, good appearance and low cost.

(2) FIGS. 7 and 8 show another embodiment in which the rice transplanter 1 can perform pest control work, sprinkling work, etc. in addition to rice planting work.

Conventionally, rice transplanters were stored in a barn or the like except when rice was being planted, and were not used all year round and were infrequently used. Therefore, the rice transplanter 1 of the embodiment shown in FIGS. 7 and 8 can be used for purposes other than rice planting, and can be used both in paddy fields and upland fields, thereby improving the efficiency of use of agricultural machinery.

That is, the input pulley 3b of the main transmission case 3 is a two-stage pulley consisting of an inner small-diameter pulley 73 and an outer large-diameter pulley 74. As shown in FIG. A transmission belt 50 is wound around the drive pulley 2b of the engine 2 and the inner small-diameter pulley 73 to transmit power from the engine 2 to the input shaft 3a.

The outer large-diameter pulley 74 serves as a drive pulley for a general-purpose power sprayer 80 as a field work machine, which will be described later.

Then, the spare seedling mounting base 39 is removed from the machine body by removing the bolts from the upper parts of the left and right spare seedling frames 41, 41, and instead, the general-purpose power sprayer 80 is attached with bolts.

The general-purpose power sprayer 80 is provided in the upper position between the left and right driving wheels 5, 5 at the center position in the left-right direction of the machine body, and the machine body is well-balanced.

The general-purpose power sprayer 80 is for spraying chemical liquids such as common insecticides and fungicides on the field. It is composed of a spraying part 84 for spraying the liquid medicine stored in the .

A transmission belt 85 is wound around an input pulley 81 of the general power sprayer 80 and an outer large diameter pulley 74 of the input pulley 3b provided on the input shaft 3a of the main transmission case 3 so that the power from the engine 2 is transmitted to the general power sprayer 80. It is transmitted to the driving section 82 .

At this time, by using the outer large diameter pulley 74 outside the input pulley 3b, which is a two-stage pulley provided on the input shaft 3a of the main transmission case 3, the transmission belt 85 can be easily attached to the input pulley 81 and the outer large diameter pulley 74. can be wound.

The effective diameter of the input pulley 81 of the general-purpose power sprayer 80 is smaller than the effective diameter of the outer large-diameter pulley 74, so that the driving section 82 can easily output high-speed rotational driving.

Also, the base portions of the left and right front wheel support frames 90 , 90 are fixed with bolts 91 to mounting holes provided in the left and right side plates of the engine base 60 .

Left and right front wheel support pipes 90a, 90a are welded and fixed to the ends of the left and right front wheel support frames 90, 90 so as to be inclined toward the left and right inward sides of the fuselage.

Upper portions of left and right front wheel support shafts 90b, 90b are fixed to the left and right front wheel support pipes 90a, 90a.

Left and right front wheels 92, 92 made of rubber wheels are freely rotatable on front wheel shafts 90c, 90c provided at the lower ends of left and right front wheel support shafts 90b, 90b, respectively.

A plurality of mounting holes are provided in the upper part of the left and right front wheel support shafts 90b, 90b in the vertical direction. The height of 92 can be set freely.

The left and right front wheels 92, 92 have a positive camber to reduce the load during turning of the aircraft.

The left and right front wheels 92, 92 have the same tread as the left and right drive wheels 5, 5, and are grounded in front of the left and right drive wheels 5, 5. can run.

When spraying in the field, the planting lift lever 29 is operated to the raised position to stop the operation of the planting part, and the left and right drive wheels 5, 5 are lowered to raise the machine body, and the left and right front wheels 92, 92 and the left and right driving wheels 5, 5 keep the machine in a horizontal state, and when the left and right front wheels 92, 92 and the left and right driving wheels 5, 5 are positioned between the ridges of the field and the left and right driving wheels 5, 5 are driven forward, The left and right front wheels 92, 92 and the left and right drive wheels 5, 5 rotate between the ridges to maintain a horizontal posture without breaking the ridges, and the aircraft moves forward in a stable posture, and the power of the engine 2 is used to drive the general-purpose power sprayer 80. 82 to perform the spraying operation.

In the above-described embodiment, the input pulley 3b provided on the input shaft 3a of the main transmission case 3 is a two-stage pulley, and the driving force is transmitted to the input pulley 81 of the general-purpose power sprayer 80. The drive pulley 2b provided on the shaft 2a is used as a two-stage pulley, and an outer large-diameter pulley 74 is provided outside the drive pulley 2b provided on the output shaft 2a of the engine 2. 85 may be wound to transmit the driving force to the driving portion 82 of the universal power sprayer 80 .

In the above-described embodiment, an example in which the general-purpose power sprayer 80 is installed is shown. Any working equipment such as a power sprinkler may be attached. As in the above example, the outer large-diameter pulley 74 of the input pulley 3b, which is a two-stage pulley provided on the input shaft 3a of the main transmission case 3, or the outer large-diameter drive pulley 2b provided on the output shaft 2a of the engine 2 Driving force is transmitted from the pulley 74 through the transmission belt 85 .

2 engine 3 main transmission case 5 drive wheel 37 bonnet cover 38 fuel tank 40 recoil rope 43 support frame 45 rope guide (rope guide pulley)
46 pivot shaft 56 muffler 58 cover 58a heat shielding material (heat shielding sheet)

Claims (6)

A seedling transplanter in which the power of an engine (2) is transmitted to a main transmission case (3) and progresses with a drive wheel (5) driven and rotated by the power of the main transmission case (3), provided in the engine (2) A seedling transplanter characterized in that a muffler (56) is connected to a support frame (43) whose base is fixed to a main transmission case (3). 2. Seedling transplanter according to claim 1, characterized in that the supporting frame (43) is provided with a rope guide (45) for guiding the recoil rope (40) of the recoil starter for starting the engine (2). 3. A seedling transplanter according to claim 2, characterized in that the rope guide (45) is a rope guide pulley (45) rotatably pivoted on the support frame (43) by a pivot shaft (46). A seedling transplanter that advances by a drive wheel (5) that transmits power of an engine (2) to a main transmission case (3) and is driven and rotated by the power of the main transmission case (3), wherein a fuel tank (38) and A cover (58) is provided between a muffler (56) arranged below a fuel tank (38), and a space is provided between the fuel tank (38), the cover (58) and the muffler (56). seedling transplanter. 5. The seedling transplanter according to claim 4, wherein a heat shielding material (58a) is provided on the bottom surface of the cover (58). 6. The seedling transplanter according to claim 4 or 5, wherein the right and left sides of the cover (58) protrude outward from the machine body beyond the left and right sides of the bonnet cover (37) covering the engine (2).