JP2001128515A - Sulky transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small and lightweight sulky transplanter which can easily be manufactured at a low cost and whose whole machine frame has good longitudinal balance. SOLUTION: This sulky transplanter in which a seedling-transplanting device provided with plural planting tools for taking out seedlings from a seedling- loading table and then planting the taken seedlings in a field is liftably attached to the rear portion of the sulky travel vehicle body, characterized by disposing a rear frame 42 formed by connecting a connection pipe 41 to the upper portions of plural vertical transmission pipes 40 at the rearer place of the machine frame than the seedling-loading table of the seedling-planting device, and driving vertical transmission shafts 72 disposed in the vertical transmission pipes 40 with a planting tool-driving shaft 71 disposed in the connection pipe 41, thus driving the planting tools attached to the lower portions of the vertical transmission pipes 40, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a riding type transplanter having a lightweight and compact structure with good longitudinal balance of the body and a simple power transmission structure of a seedling plant.

[0002]

2. Description of the Related Art In a conventional riding type transplanter, a transmission case equipped with a planting tool is disposed at a position extending from the front to the rear of the fuselage with respect to the seedling mounting table, and the transmission case is formed by aluminum die casting. At the same time, the portion for transmitting the driving force to the planting device was located forward of the airframe than the seedling mounting table.

[0003]

However, in the above-mentioned conventional construction, the construction is inevitably heavy, so that the link mechanism for mounting the planting device and the body frame of the riding type traveling vehicle body are rigid. It was necessary to have a large and large frame structure, and it was a heavy, large-sized riding type transplanter.

[0004] Since the portion for transmitting the driving force to the planting device is located forward of the fuselage with respect to the seedling mount, the weight center of gravity of the riding type transplanter as a whole is forward, and the longitudinal balance of the fuselage is poor. Met. Therefore, it is necessary to increase the size of the fuselage in order to improve the front-rear balance of the fuselage, and it has been difficult to obtain a small and lightweight riding type transplanter.

[0005]

According to a first aspect of the present invention, there is provided a planting tool for removing seedlings from a seedling mounting table at the rear of a riding type vehicle body 1 and planting the seedlings in a field. 2
In the riding type transplanter in which the seedling plant 17 equipped with the above-mentioned 7 is mounted so as to be able to move up and down, the upper part of the plurality of vertical transmission pipes 40 is connected to the connecting pipe 4 behind the seedling table 26 of the seedling plant 17.
The rear frame 42 connected and connected in 1 is arranged, and the vertical transmission shaft 72 provided in each vertical transmission pipe 40 is driven by the planting tool drive shaft 71 provided in the connection pipe 41, thereby Is a riding type transplanter that drives and operates the implanting tool 27 attached to the lower part of the vertical transmission pipe 40 of FIG.
According to the second aspect of the present invention, the front frame 43 and the rear frame 42 disposed on the front side of the fuselage with respect to the seedling mounting table 26 are connected to each other by the left and right connection frames 44 to form a single unit and have a rectangular shape in plan view. According to a third aspect of the present invention, there is provided the riding type transplanter according to the first aspect, wherein the implantable frame 30 is configured.
An input shaft 63 to which driving force is transmitted from the riding type traveling vehicle body 1 side
Is provided at the center or the middle of the front frame 43, and the implant driving shaft 71 in the rear frame 42 is provided from the input shaft 63.
The driving force is transmitted to the portable transplanter according to any one of claims 1 and 2, and the invention according to claim 4 is a
4. A riding type transplanter according to claim 1, wherein a drive mechanism for reciprocating the right and left is disposed near the front frame 43, and a driving force is transmitted from the input shaft 63 to the drive mechanism. The invention according to claim 5 is the riding type transplanter according to any one of claims 1 to 4, wherein the planting frame 30 is integrally formed with a pipe body. The invention according to claim 6 is directed to the riding type traveling vehicle body 1 side. An input shaft 63 to which the driving force is transmitted is provided at the center of the front frame 43, and the driving force is transmitted from the input shaft 63 to the planting tool driving shaft 71 in the rear frame 42, and the seedling plant 17 is moved. The rolling transplanter according to any one of claims 1 to 2 and 4 to 5, wherein the rolling support portion 56 for supporting the rolling freely is fixed to the left and right central portions of the front frame 43. Of the riding-type traveling body 1 in a side view of the aircraft. Is obtained by a riding-type transplanter of claims 1 to 6, wherein placing the engine 8 within the width of the rear end of the front end and the rear wheel 7 of the wheel 6.

[0006]

According to the first aspect of the present invention, a seedling plant 1 is provided.
7, a plurality of vertical transmission pipes 4
0 is connected by a connecting pipe 41, a rear frame 42 is arranged, and a vertical transmitting shaft 72 provided in each vertical transmitting pipe 40 by an implanter driving shaft 71 provided in the connecting pipe 41. Is driven to drive the implanting tool 27 attached to each of the lower portions of the plurality of vertical transmission pipes 40, so that a generally-used commercially available pipe material is used. The power transmission case does not need to be manufactured by aluminum die casting in a special molding die, so that the manufacturing cost of the rear frame 42 is very low and the manufacturing is easy. Further, since the plant is a pipe, the seedling planting device 17 has a light weight configuration. Therefore, the link mechanism for mounting the planting device 17 and the body frame of the riding type traveling vehicle body have a large rigid frame structure as in the related art. This eliminates the necessity, and allows the entire riding type transplanter to have a small and lightweight configuration.

[0007] Naturally, the implant driving shaft 7 for transmitting the driving force to the rear frame 42 and the implant 27 provided therein.
By disposing the first transmission shaft 72 and the vertical transmission shaft 72 behind the seedling mounting table 26, the transmission configuration to the plurality of planting tools 27 is simplified. Further, the front-rear balance of the body of the riding type transplanter as a whole is improved, and a small and lightweight riding type transplanter can be obtained.

According to a second aspect of the present invention, a front frame 43 and a rear frame 42, which are disposed on the front side of the fuselage with respect to the seedling mounting table 26, are connected to each other by left and right connecting frames 44 to form an integral unit. Since the riding type transplanter according to the first aspect has the rectangular implanting frame 30, the planting frame 30 has a light weight and a strong configuration in addition to the operation and effect of the first aspect. Although it is a small and light riding type transplanter, a transplanter with good planting performance can be obtained and a good transplant operation can be performed.

A third aspect of the present invention is a riding type traveling vehicle body 1.
The input shaft 63 to which the driving force is transmitted from the side is connected to the front frame 4
3. A riding type transplanter according to claim 1 or 2, wherein the driving force is transmitted from the input shaft 63 to the implant driving shaft 71 in the rear frame 42. In addition to the functions and effects of the inventions described in (1) to (2), the transmission configuration from the riding type traveling vehicle body 1 to the plurality of planting tools 27 is simplified.

According to a fourth aspect of the present invention, a driving mechanism for reciprocating the seedling mounting table 26 right and left is disposed near the front frame 43, and a driving force is transmitted to the driving mechanism from the input shaft 63. Since the riding type transplanter described in any one of the first to third aspects is adopted, in addition to the effects of the inventions according to the first to third aspects, the plurality of planting tools 27 and the seedling table 26 are reciprocated right and left from the riding type traveling vehicle body 1 side. The transmission structure to the drive mechanism is simplified, and
The production cost is low and the production is easy.

According to a fifth aspect of the present invention, the planting frame 30 is provided.
Is formed integrally with a pipe body, so that in addition to the functions and effects of the inventions according to claims 1 to 4, the production cost is reduced and the production is easy. Thus, the seedling plant 17 has a lighter configuration, so that the whole riding type transplanter can be made smaller and lighter.

According to a sixth aspect of the present invention, a riding type traveling vehicle body 1 is provided.
The input shaft 63 to which the driving force is transmitted from the side is connected to the front frame 4
3 is provided in the center of the rear frame 4 from the input shaft 63.
A rolling support portion (56) for transmitting a driving force to the planting tool drive shaft (71) in the second frame (2) and supporting the seedling plant (17) in a freely rolling manner is fixed to the left and right central portions of the front frame (43). Since the riding type transplanter according to the fourth or fifth aspect is provided, in addition to the functions and effects of the inventions according to the first to second and fourth to fifth aspects, the transmission configuration from the side of the riding type traveling vehicle body 1 to the seedling plant 17 that performs a rolling operation is provided. Is simple and easy to transmit.

According to a seventh aspect of the present invention, the engine 8 is disposed within the width between the front end of the front wheel 6 and the rear end of the rear wheel 7 of the riding type vehicle body 1 when viewed from the side of the fuselage. Since the type transplanter is used, in addition to the functions and effects of the inventions according to claims 1 to 6, the front and rear balance of the body is further improved as a whole, and the small and lightweight ride type transplanter excellent in planting performance. Can be obtained.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a four-row planting type rice transplanter according to an embodiment of the present invention.

Reference numeral 1 denotes a riding-type traveling vehicle body, which is formed by connecting a transmission case 2 disposed at a front portion and a rear wheel transmission case 3 disposed at a rear portion of the vehicle with a frame 4. Left and right front axle cases 5.5 are fixed to left and right side surfaces of a rear portion of the transmission case 2, and left and right steering front wheels 6.6 are provided below the left and right front axle cases 5.5.

The rear wheel transmission case 3 is composed of a main case 3a fixed to the frame 4 and left and right chain cases 3b, 3b having bases fixed to the right and left sides of the main case 3a and extending rearward. It has a U-shape.

Reference numerals 7.7 designate left and right driving rear wheels which are respectively mounted on the outside of the left and right chain cases 3b. 8
Is an engine mounted on the upper part of the rear wheel transmission case 3, power is transmitted from the engine 8 to the transmission case 2 at the front of the fuselage, and the left and right front axle cases 5. Power is transmitted to the left and right steering drive front wheels 6 by the transmission shaft in 5, and further transmitted to the rear wheel differential mechanism in the main case 3 a of the rear wheel transmission case 3 via the transmission shaft in the frame 4. Power is transmitted from the rear wheel differential mechanism to the axles 9 via the transmission chains in the left and right chain cases 3b.
7 is configured to be driven. Note that left and right side brakes are provided in the main case 3a of the rear wheel transmission case 3, and the left and right brake pedals provided on the front left side of a step 10 provided in front of the engine 8 are depressed. The left and right side brakes are configured to work. Further, in the transmission case 2, a main transmission mechanism in which the rotational driving force of the engine 8 is shifted by the main transmission lever 11 and a front wheel differential mechanism are incorporated.

Reference numeral 12 denotes a body cover formed by FRP. An engine cover portion for covering the periphery of the engine 8 and a step 10 provided on the front and right and left sides of the engine 8 are integrally formed. It is stuck to. Step 10 is extended from both left and right sides of the steering handle 13 to the front to form left and right passages A.

Reference numeral 14 denotes a control seat.
It is mounted on the top. Reference numeral 15 denotes a link mechanism composed of an upper link and a lower link, the base end of which is pivotally connected to a support frame 16 extending above the rear wheel transmission case 3, and the rear end of which is a seedling. Vertical frame 1 provided with rolling shaft 18 for supporting planting device 17 in a freely rolling manner
9 is pivoted.

Reference numeral 20 denotes a hydraulic cylinder device. The base of the cylinder is pivotally connected to the rear wheel transmission case 3, and the tip of the piston is pivotally connected to the upper link. Reference numeral 21 denotes a front cover formed of a synthetic resin that covers the periphery of the handle post, and is fixed to the upper surface of the front portion of the step 10,
The upper surface is an operation panel provided with various display devices and meters. The main transmission lever 11 is provided on the left side of the front cover 21, and the belt-type continuously variable transmission provided on the transmission system between the engine 8 and the transmission case 2 is provided on the right side of the front cover 21. A sub-transmission lever 22 for operating the mechanism and an operation lever 23 for operating the planting clutch and operating the seedling plant 17 up and down are provided.

Reference numeral 24 denotes a main clutch pedal provided on the left side of the front cover 21. Reference numeral 25 denotes a differential lock pedal of a front wheel differential mechanism in the transmission system of the left and right steering drive front wheels 6.

Next, the seedling planting device 17 will be described in detail.
Seedling table 26 and four planting tools 27, which are configured as four-row planting ...
The seedling mounting table 26 provided at the front, rear, and height is supported on the planting frame 30 via the lower rail 28 and the upper rail 29 so as to be reciprocally movable left and right.
1 and the implanting tools 27, 27,
0 at the rear end.

The front side of the planting frame 30 is pivotally connected to the vertical frame 19 of the link mechanism 15 via the rolling shaft 18. The right and left steering drive front wheels 6 and 6 and the right and left rear wheels 7 and 7 are rotated and moved, and at the same time, the seedlings 27a of the planting tool 27 are planted with one plant from the seedling table 26 which reciprocates left and right. , And the rice planting operation is performed continuously.

A planting depth setting lever 32 is provided, and a center float 3 for leveling is provided below the seedling plant 17.
3. A side float 34 is provided. And the center float 33 is arranged on the left and right center lines of the aircraft,
Side floats 34 are arranged at symmetrical positions on both left and right sides of the center float 33. Therefore, the center float 33 and the left and right side floats 34
In the rice planting operation state in which the seedling planting device 17 is lowered until the plant 34 comes into contact with the mud surface, the seedling planting device 17 is in a state where the center float 33 and the left and right side floats 34 and 34 maintain a good left-right balance. , So that good rice planting work can be performed.

Next, the support structure of the center float 33 and the side float 34 for holding the seedling plant 17 at a fixed height will be described. A fulcrum shaft 35 is provided horizontally below the planting frame 30 which is a power transmission part of the seedling planting device 17 in accordance with the width of the left and right side floats 34. Support arms 36 project from rear portions of the floats 33 and 34 below the fulcrum shaft 35 toward the rear of the floats 33 and 34.
34 is pivotally connected to the rear. Further, the operation arm 37 protrudes forward from the fulcrum shaft 35, and the operation arm 37
A setting depth setting lever 32 protrudes above the front end. An intermediate portion of the planting depth setting lever 32 penetrates through a lever locking plate 39 fixed to the arch-shaped frame 38, and a plurality of locking portions formed on the lever locking plate 39. Is engaged. Therefore, the planting depth setting lever 32
Is operated to change the locking position, the rear ends of the support arms 36... Move up and down around the fulcrum shaft 35, and the floats 33.3
The vertical distance between the fulcrum shaft 4 and the fulcrum shaft 35 is adjusted, the height of the seedling plant 17 is moved up and down from the mud surface of the field, and the seedling cut by the planting tool 27 is adjusted so as to be planted at a desired depth. it can.

Next, the structure of the planting frame 30 and the power transmission of the seedling planting apparatus 17 will be described. The four-row planting apparatus 17 is equipped with four planting tools 27, 27, 27, 27. Two longitudinal transmission pipes 40, 40 for transmitting driving force to two of the planting tools 27, 27 are disposed on the left and right, and the upper portions of the vertical transmission pipes 40, 40 are connected by a connection pipe 41, so as to be viewed from the front. A portal-type rear frame 42 is formed, and planting tools 27 are arranged on both left and right sides of lower ends of the left and right vertical transmission pipes 40. A transmission shaft is supported inside the vertical transmission pipe 40 and the connection pipe 41. The front frame 43 provided in front of the rear frame 42
Left and right sides and the lower end both sides of the rear frame 42 are connected by left and right connecting frames 44, 44 to form the planting frame 30.
Are formed.

The rear frame 42, the front frame 43, and the left and right connecting frames 44, 44 constituting the planting frame 30 are all formed of pipes, and are integrally formed by welding the respective pipes.

More specifically, the left and right vertical transmission pipes 40 of the rear frame 42 are welded by inserting a lower end of a rod-shaped pipe body 45 into an upper part of a T-shaped pipe 46 of T-shape when viewed from the front. L-shaped pipe 47 whose upper end is L-shaped when viewed from the front
Welded at the lower end of The connection pipe 41 is formed by inserting and welding rod-shaped left and right pipe bodies 49 on both left and right sides of a T-shaped pipe 48 having a T-shape in plan view disposed at the center. The left and right ends of the left and right pipe bodies 49 of the connecting pipe 41 are connected to the left and right vertical transmission pipes 40.
The rear frame 42 is integrally formed by being inserted into and welded to each of the L-shaped pipes 47.

The front frame 43 is formed by inserting and welding rod-shaped left and right pipe bodies 51 on the left and right sides of a cross-shaped pipe 50 having a cross shape in a plan view, which is disposed at the center. Then, the left and right pipe bodies 51.5 of the front frame 43
1 and the T-shaped pipe 46 of the rear frame 42
Left and right connecting frame 44.4 which is a pipe body with 46 front part
4, the planting frame 30 is integrally formed by welding.

The T-shaped pipes 46, 46 arranged at the rear part
Is configured such that the axis of the horizontal pipe 46a of the T-shaped pipe 46 is disposed in the left-right direction, and power is transmitted to the crank mechanism 31 disposed on both sides of the horizontal pipe 46a.

A support portion for supporting the drive case 52, the crank mechanism 31, and the arched frame 38 is fixed to the planting frame 30. That is, the vertical transmission pipe 40
The base of the crank support arm 53 is welded upward and rearward at the rear part of the T-shaped pipe 46 disposed at the lower end of the T-shaped pipe 46 so that the rear part projects rearward. At the right end of the right pipe body 51 of the front frame 43, a case support arm 54 projects forward and upward, and a horizontal shaft support arm 55 projects forward and upward from the left pipe body 51 in parallel with the case support arm 54. The cross-shaped pipe 50 of the front frame 43
A cylindrical body 56 for fitting the rolling shaft 18 forward from the left and right central portions is fixedly provided. Also, the front frame 4
The left and right pipe bodies 51, 51 have an arched frame 3
The bases of the brackets 57 to which the fixing member 8 is fixed are fixed by welding. Therefore, the planting frame 30 has a simple configuration in which the pipe bodies are welded and connected, and has a sufficient space.
The support portions of the crank mechanism 31, the drive case 52, and the transverse feed shaft 58 are firmly fixed, and a durable support portion that is resistant to vibration and impact is configured.

The rear portion of the crank support arm 53 is branched into two in plan view, and a pivotal support portion 53a
A pin for pivotally supporting the arm base of the crank mechanism 31 is fixed to 53a. Also, the left and right pivots 53a and 53
A portion between a is connected and reinforced by a portal-type reinforcing body 59 in a plan view, so that the crank mechanisms 31 can be firmly pivotally supported.

Further, in the front-rear direction of the upper part of a U-shaped fixed body 60 in a side view, which is welded and fixed to the upper surface of the cross-shaped pipe 50 at the left and right central positions of the front frame 43 with its open end facing upward and forward. The cylindrical body 56 having the axis is fixed by welding.
A reinforcing member 61 is provided between the lower part of the front part of the cylindrical body 56 and the front part of the fixed body 60.
Is fixed, and a tubular body 56 is firmly fixed on the upper part of the left and right central portions of the front frame 43. Therefore, since the rolling shaft 18 is firmly supported, the seedling plant 1
7 can roll stably.

On the left and right sides of the rear end of the crank support arm 53, a link base of the crank mechanism 31 is pivotally supported, and a crank drive shaft 62 supported by a T-shaped pipe 46 below the vertical transmission pipe 40. Crank mechanism 3 at both ends of
The other links that make up 1 are fixed and allow the implant 27 to crank. In addition, an arch-shaped frame 38 that bends a pipe body into a gate shape is disposed at the front of the planting frame 30. The left and right open ends of the arch-shaped frame 38 are bolted to the brackets 57 and 57 in front. Fixed. The arch-shaped frame 38 is provided with a lateral feed shaft 58 described later.
Of the arch-shaped frame 38
The above-described upper rail 29 is supported using the upper portion, and the planting frame 30 and the arch-shaped frame 38 are integrally connected to each other to form a highly rigid frame that supports the seedling plant 17.

A drive case 52 is fixedly provided on the outer side surface of the case support arm 54, and a lateral feed shaft 58 is pivotally supported at the front of the case support arm 54 and the front of the horizontal shaft support arm 55. The right end of the feed shaft 58 is inserted into the drive case 52. The transverse feed shaft 58 is disposed parallel to the front frame 43, and the transverse feed shaft 58 is disposed above the rolling shaft 18 in a side view, so that the support structure of the transverse feed shaft 58 is simple and efficient. It has an arrangement configuration.

A transmission shaft and a bevel gear for transmitting a driving force to the planting device 27 and the lateral feed shaft 58 are supported inside the planting frame 30. That is, the front frame 43
An input shaft 63 is pivotally supported by a pipe protruding from the front of the cross-shaped pipe 50 at the left and right center positions of the PTO shaft 6 extending rearward from the rear of the riding type vehicle body 1.
4 is connected and driven via a universal joint 65. A bevel gear 66 is fixed to the rear end of the input shaft 63 and meshes with a bevel gear 68 fixed to a transverse drive shaft 67 in the front frame 43 to drive the transverse drive shaft 67. Also, the cross-shaped pipe 50
A front portion of a transmission shaft 69 is supported by a pipe protruding to the rear of the transmission shaft 69, and a bevel gear 70 is fixed to a front portion of the transmission shaft 69, and is fixed to a lateral feed drive shaft 67 in the front frame 43. The rotation driving force is transmitted to the transmission shaft 69 by meshing with the bevel gear 68.

On the other hand, the connecting pipe 41 of the rear frame 42
A planting drive shaft 71 is supported in the inside, and a vertical transmission shaft 72 and a crank driving shaft 62 are respectively supported in the left and right vertical transmission pipes 40. A rear portion of the transmission shaft 69 is supported by a pipe protruding from the front of the T-shaped pipe 48 of the connection pipe 41, and a bevel gear 73 is fixed to the rear portion of the transmission shaft 69. It is configured to mesh with a bevel gear 74 fixedly mounted on the accessory drive shaft 71 to transmit a rotational driving force to the implant drive shaft 71. In addition, bevel gears 75
A bevel gear 76.7 is fixedly mounted on the upper end of the left and right vertical transmission shafts 72 in the left and right vertical transmission pipes 40.
6, and a rotational driving force is transmitted to the left and right vertical transmission shafts 72. Further, the left and right vertical transmission shafts 72
Bevel gears 77 are fixedly provided at lower ends of the bevel gears 78, and bevel gears 78 are fixedly mounted on the crank drive shafts 62.
· 78 respectively, and the left and right crank drive shafts 62 · 62
The rotation driving force is transmitted to the vertical transmission pipe 40, and drives the crank mechanism 31 disposed on the side of the T-shaped pipe 46 below the vertical transmission pipe 40 to move the planting claw 27a of the planting tool 27 to a desired locus. , So that the seedlings are planted. In the embodiment, the transmission shaft 69 is exposed, but a cylindrical cover covering the transmission shaft 69 is provided between the pipe protruding from the rear part of the cross-shaped pipe 50 and the front part of the T-shaped pipe 48. If the transmission shaft 69 is covered with the cover, it is safe even if the transmission shaft 69 rotates, and it is possible to avoid a situation in which other objects are involved.

In the above embodiment, an example is shown in which the pipes are inserted and welded and fixed in a state where the transmission shaft and the bevel gear are arranged in the respective pipes by bearings. However, each pipe is inserted for maintenance. It may be configured to fix with bolts.

Next, power transmission to the seedling table driving mechanism such as the lateral feed shaft 58 will be described. The right end of the transverse drive shaft 67 in the front frame 43 projects sideward from the right pipe body 51 and is inserted into the drive case 52, and a sprocket 79 is fixedly provided at the end. Then, the drive case 52
The right end of the transverse feed shaft 58 inserted in the
0 is fixedly mounted, a transmission chain (not shown) is wound between the sprocket 80 and the sprocket 79, and a seedling table drive mechanism for transmitting power to the lateral feed shaft 58 is configured. Further, a driving spiral groove 58a on which the slide follower 81 slides is formed in the lateral feed shaft 58, and a receiving body 82 of the slide follower 81 is loosely fitted on the outer peripheral surface of the transverse feed shaft 58. The tip of the sliding follower 138 provided in the receiving body 82 is fitted into the groove 58a, and the sliding follower 81 slides in the groove 58a with the rotation of the transverse feed shaft 58, and the receiving body 82 It reciprocates right and left on the feed shaft 58. The seedling mounting table 26 is connected to the rear portion of the receiving body 82 via a connecting portion, and the seedling mounting table 26 is reciprocated right and left by the rotation of the lateral feed shaft 58.

The left end of the horizontal feed shaft 58 projects leftward from the horizontal shaft support arm 55, and is provided with a vertical feed drive cam 83, which abuts a well-known driven cam below the seedling mounting table 26. It is arranged as possible. Therefore, the vertical feed drive cam 8
3 is brought into contact with the driven cam at the left-right moving end of the seedling mounting table 26 and rotates the driven cam, whereby the vertical feed belt 84 is driven to rotate at the left-right moving end of the seedling mounting table 26, and the seedling mat is vertically moved. Sent.

On the other hand, when the front part of the center float 33 is lifted to an appropriate range or more by an external force, the hydraulic oil pumped from the inside of the transmission case 2 by the hydraulic pump mounted on the left side of the transmission case 2 Cylinder 20
To raise the seedling planting device 17 to the proper planting position, and when the front part of the center float 33 falls below the proper range, the pressure in the hydraulic cylinder 20 is increased. The oil is returned into the transmission case 2, the link mechanism 15 is moved down to lower the seedling planting device 17 to the proper planting position, and when the front portion of the center float 33 is in the proper range (seedling plant 1).
7 is in the proper predetermined position).
The hydraulic valve for controlling the hydraulic cylinder 20 and the front part of the center float 33 are connected to each other in order to stop the pressurized oil from entering and leaving the seedling plant 17 at a fixed position.

The operation lever 23 protruding from the right side of the front cover 21 and provided on the lower right side of the steering handle 13 operates the PTO clutch provided in the transmission case 2 to the seedling plant 17. The power of the plant can be turned on and off, and the seedling plant 17 can be moved up and down manually by operating a hydraulic valve. That is, when the operation lever 23 is set to the “fixed” position,
The PTO clutch is disengaged, the operation of the seedling plant 17 is stopped, and the hydraulic valve is switched to the position where the hydraulic oil stops the flow of the hydraulic oil in the hydraulic cylinder 20 and the seedling plant 17 is held at a fixed position, and the seedling plant 17 also rises. Do not descend. When the operation lever 23 is operated backward to the “down” position, P
Although the TO clutch is disengaged and the operation of the seedling plant 17 is stopped, the hydraulic valve is in an automatic control state in which the hydraulic valve is switched by the vertical movement of the center float 33. And then,
When the operation lever 23 is set to the "on" position, the PTO clutch is engaged, the seedling planting device 17 is driven, and the hydraulic valve is in an automatic control state in which the center valve 33 is switched by up and down movement. On the contrary, the operation lever 23 is operated forward to “up”
In this position, the PTO clutch is disconnected, the operation of the seedling plant 17 is stopped, and the hydraulic valve is forcibly switched to the side where the seedling plant 17 is raised, so that the seedling plant 17 is raised.

The four-row riding type rice transplanter constructed as described above is put into a paddy field, the seedlings are placed on the seedling mounting table 26, the engine 8 is started, and the main shift lever 11 is set to the "planting speed". Position, the sub-shift lever 22 is set to the "high" or "low" position, the operation lever 23 is set to the "on" position, and each unit is driven to move the machine forward. Rice planting work is controlled. At this time, since the operation lever 23 is in the “in” position during the seedling planting operation, the rear wheel differential mechanism does not rotate differentially, and the left and right rear wheels 7, 7 rotate the same. It is good and can plant seedlings straight.

When turning the aircraft around the ridge,
When the operation lever 23 is set to the "up" position, the PTO clutch is disengaged, the operation of the seedling planting device 17 is stopped, and the hydraulic valve is forcibly switched to the side where the seedling planting device 17 is raised, so that the seedling planting device 17 is raised. As a result, the rear wheel differential mechanism rotates differentially. Therefore, when the operator operates the control handle 13 to turn the aircraft, the right and left rear wheels 7, 7 can appropriately rotate differentially, and can make a small turn without disturbing the mud surface of the field much.
The headland is not damaged so much that headland planting work can be performed well. When the operator operates the steering handle 13 and depresses the brake pedal on the turning side at the same time as turning, the turn can be further reduced.

If the worker is a skilled worker, setting the sub-shift lever 22 to the "high" position results in a high working speed, thereby improving working efficiency. On the other hand, when traveling on the road, the operation lever 2
3 is operated in the "fixed" position, the rear wheel differential mechanism rotates differentially. Therefore, since the left and right rear wheels 7, 7 rotate differentially, it is possible to perform favorable road running.

In particular, the seedling table 26 of the seedling plant 17
A rear frame 42 formed by connecting the upper portions of the plurality of vertical transmission pipes 40 with a connection pipe 41 behind the fuselage is disposed, and each of the vertical transmissions is driven by a planting drive shaft 71 provided in the connection pipe 41. Since the vertical transmission shaft 72 provided in the pipe 40 is driven to drive and operate the implants 27 attached to the lower portions of the plurality of vertical transmission pipes 40, a riding type transplanter is provided.
By using a very common commercially available pipe material, there is no need to manufacture a power transmission case by aluminum die casting in a special molding die, and the manufacturing cost of the rear frame 42 is extremely low, and the manufacturing is easy. is there. Also,
Since it is a pipe, the seedling planting device 17 has a lightweight configuration,
Therefore, it is not necessary to make the link mechanism for mounting the implanting device 17 or the body frame of the riding type traveling vehicle body a large rigid and large frame configuration, and the entire riding type implanting machine can be made small and lightweight. Of course, by arranging the planting tool drive shaft 71 and the vertical transmission shaft 72 that branch and transmit the driving force to the rear frame 42 and the planting tool 27 provided therein, a plurality of The transmission configuration to the implant 27 is simplified. Further, the front-rear balance of the body of the riding type transplanter as a whole is improved, and a small and lightweight riding type transplanter can be obtained.

Further, the front frame 43 and the rear frame 42 disposed on the front side of the fuselage with respect to the seedling mounting table 26 are connected to each other by left and right connecting frames 44, 44 to be integrally formed to form a rectangular planting frame in plan view. 30 so that the planting frame 3
Although it is a small and light riding type transplanter that can have a strong structure while being lightweight, a transplanter with good planting performance can be obtained and a good transplant operation can be performed.

Further, an input shaft 63 to which a driving force is transmitted from the riding type traveling vehicle body 1 is provided at the center of the front frame 43, and the input shaft 63 is connected to the planting tool drive shaft 71 in the rear frame 42. The rolling support portion 56 that transmits the driving force and supports the seedling plant 17 in a freely rolling manner is fixed to the left and right central portions of the front frame 43, so that the seedling plant 17 that performs rolling operation from the riding type traveling vehicle body 1 side. And the transmission to the plurality of implants 27 is a simple configuration. Of course, a drive mechanism for reciprocating the seedling mounting table 26 right and left is arranged near the front frame 43, and the drive mechanism is provided with the input shaft 63.
Since the driving force is transmitted from the vehicle, the transmission configuration from the riding type traveling vehicle body 1 side to the driving mechanism for reciprocating the seedling mounting table 26 in the left and right direction is simplified, and the manufacturing cost is low and the manufacturing is easy.

Further, since the planting frame 30 is formed integrally with a pipe, the production cost is further reduced and the production is easy, and the seedling planting device 17 has a lighter configuration. Furthermore, a compact and lightweight configuration can be achieved.

On the other hand, since the engine 8 is arranged within the width between the front end of the front wheel 6 and the rear end of the rear wheel 7 of the riding type traveling body 1 when viewed from the side of the aircraft, the longitudinal balance of the aircraft as a whole is improved. In other words, it is a small and lightweight riding transplanter with excellent planting performance.

In the above embodiment, the present invention is applied to a four-row riding type rice transplanter. However, the present invention may be applied to any other transplanter.

[Brief description of the drawings]

FIG. 1 is an overall side view of a riding rice transplanter.

FIG. 2 is a plan view of the seedling plant.

FIG. 3 is a partial cross-sectional plan view showing a power transmission configuration of the planting frame.

FIG. 4 is a side view showing a power transmission configuration of the planting frame.

FIG. 5 is a partial cross-sectional plan view showing the planting frame.

FIG. 6 is a side view showing the planting frame.

FIG. 7 is a simplified perspective view showing a power transmission configuration of the planting frame.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Riding type vehicle body 6 Front wheel 7 Rear wheel 8 Engine 17 Seedling plant 26 Seedling stand 27 Planting tool 30 Planting frame 40 Vertical transmission pipe 41 Connecting pipe 42 Rear frame 43 Front frame 44 Left and right connecting frame 56 Rolling support part (Cylinder) 63 Input shaft 71 Planter drive shaft 72 Vertical transmission shaft

Claims (7)

[Claims] 1. A riding type transplanting machine in which a seedling planting device 17 equipped with a planting tool 27 for taking out seedlings from a seedling mounting table 26 at a rear portion of the riding type traveling vehicle body 1 and planting the seedlings in a field is mounted so as to be movable up and down. A rear frame 42 formed by connecting upper portions of a plurality of vertical transmission pipes 40 with a connecting pipe 41 is disposed behind the seedling mounting table 26 of the seedling plant 17 with a connecting pipe 41, and planting provided in the connecting pipe 41. The driving mechanism drives a vertical transmission shaft 72 provided in each vertical transmission pipe 40 by a tool drive shaft 71 to drive and drive the planting tools 27 attached to the lower portions of the plurality of vertical transmission pipes 40. Type transplanter. 2. A planting frame having a rectangular shape in a plan view formed by connecting a front frame 43 and a rear frame 42, which are arranged on the front side of the fuselage with respect to the seedling mounting table 26, by connecting left and right connecting frames 44, 44 integrally. 30. The device according to claim 1, wherein
The riding type transplanter as described. 3. An input shaft 63 to which a driving force is transmitted from the riding type traveling vehicle body 1 is provided at a central portion or an intermediate portion of the front frame 43, and the implanting device driving shaft in the rear frame 42 is provided from the input shaft 63. 3. The riding type implanting machine according to claim 1, wherein the driving force is transmitted to the base. 4. A driving mechanism for reciprocating the seedling mounting table 26 right and left is disposed near the front frame 43, and a driving force is transmitted to the driving mechanism from the input shaft 63. 3. The riding type transplanter according to 3. 5. The riding type transplanter according to claim 1, wherein the planting frame 30 is formed integrally with a pipe. 6. An input shaft 63 to which a driving force is transmitted from the riding type traveling vehicle body 1 is provided at a central portion of the front frame 43.
From the input shaft 63, the implant driving shaft 7 in the rear frame 42
A rolling support portion (56) for transmitting a driving force to the first frame (1) and rotatably supporting the seedling planting device (17) is fixed to the left and right central portions of the front frame (43).
6. The riding implanter according to any one of claims 1 to 4, and 4 and 5. 7. The front wheel 6 of the riding-type traveling vehicle body 1 as viewed from the side of the vehicle body.
7. The riding type transplanter according to claim 1, wherein the engine is disposed within a width between a front end of the rear wheel and a rear end of the rear wheel.