Paddy field working machine

Abstract

A rice field working machine capable of maintaining a state in which a transplanting unit is attached to a seedling transplanting device. A seedling transplanting unit (6L, 6R) composed of a plurality of seedling placement portions, a plurality of seedling transplanting mechanisms, and a transplanting frame is provided in a manner that can be divided into right and left sides in the left-right direction, the seedling transplanting unit (6R, 6L) is linked to a lifting link mechanism (11), and a rotor for land preparation (50) includes a central rotating body portion (50C) located at a central portion in the left-right direction and end rotating body portions (50R, 50L) disposed at both sides in a direction along an axis of rotation of the central rotating body portion (50C), the rotor for land preparation is configured so that the end rotating body portions (50R, 50L) of the left and right sides can be divided with respect to the central rotating body portion (50C), the central rotating body portion (50C) is supported by the lifting link mechanism (11), and the end rotating body portions (50R, 50L) of the left and right sides are supported by the corresponding seedling transplanting units (6R, 6L) of the left and right sides.

Description

Technical Field

[0001] The present invention relates to a paddy field operation machine having a land preparation device in front of a seedling transplanting device, wherein the land preparation device has a land preparation rotor that is rotated about a rotation axis along the left and right transverse directions. Background Technology

[0002] A paddy field operation machine with a tillage device equipped with a tillage rotor in front of the seedling transplanting device is known in the past.

[0003] The paddy field operation mechanism is as follows: a land preparation device is provided at the front of the seedling transplanting device, and rotational power is input from the drive system of the seedling transplanting device to one end of the drive shaft of the land preparation rotor. The land preparation rotor is driven to rotate, and the farmland before the seedling transplanting operation is carried out by the seedling transplanting device is prepared (see Patent Document 1).

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2017-35034 Summary of the Invention

[0007] The problem that the invention aims to solve

[0008] The paddy field machine described in Patent Document 1 is useful in that it can equip the land preparation rotor with the front of the seedling transplanting device to prepare the farmland before the seedling transplanting operation.

[0009] However, in such a structure, where a device with a large number of planting rows is used as the seedling planting device and a structure that can divide or fold the seedling planting device is adopted for storage and transportation, it is impossible to divide or fold the land preparation with the rotor, and disassembly and other operations are required. There is still room for improvement in this aspect.

[0010] The present invention provides a paddy field operation machine that can maintain the state of the tillage rotor connected to the seedling transplanting device and perform tillage rotor division.

[0011] Solution for solving the problem

[0012] The paddy field operation machine of the present invention is characterized in that it is equipped with:

[0013] The seedling transplanting device is connected to and supported at the rear of the traveling machine via a lifting linkage mechanism; and

[0014] The soil-preparing rotor is driven to rotate around a horizontal axis in front of the seedling planting device.

[0015] The seedling transplanting device includes a seedling transplanting unit that can be divided into a right and a left side in the left-right direction. Each seedling transplanting unit consists of a combination of multiple seedling placement sections, multiple seedling transplanting mechanisms, and a transplanting frame. The multiple seedling placement sections are arranged in a horizontal row along the left-right direction. The multiple seedling transplanting mechanisms are arranged corresponding to the seedling placement sections. The transplanting frame supports the seedling placement sections and the seedling transplanting mechanisms.

[0016] The seedling planting unit is connected to the lifting linkage mechanism.

[0017] The land leveling rotor includes: a central rotating body portion located at the center in the left-right direction; and end rotating body portions disposed on the left and right sides along the rotation axis of the central rotating body portion. The land leveling rotor is configured such that the left and right end rotating body portions can be separated relative to the central rotating body portion.

[0018] The central rotating body is supported by the lifting linkage mechanism, and the left and right end rotating bodies are supported by the corresponding seedling planting units on the left and right sides.

[0019] According to the present invention, the land preparation rotor is configured such that the left and right end rotating parts can be separated relative to the central rotating part. Furthermore, the central rotating part is supported by a lifting linkage mechanism, and the left and right end rotating parts are supported by corresponding seedling planting units on the left and right sides.

[0020] Therefore, even if the left and right end rotating parts are in a state of being separated relative to the central rotating part, the central rotating part and the left and right end rotating parts will be supported by the lifting linkage mechanism and the corresponding seedling planting units on the left and right sides respectively, and can maintain the state of being connected to the seedling planting device while being separated.

[0021] Therefore, in paddy field operation machines, without the need for disassembly and assembly of the tillage rotor, the tillage rotor can be maintained on the seedling planting device while being in a divided state, making it easy to store and transport.

[0022] In this invention, preferably, the seedling planting unit is connected to the lifting linkage mechanism via a folding mechanism.

[0023] The folding mechanism includes: a central frame supported by the lifting linkage mechanism; a right end frame connected to the right end of the central frame in a manner that allows relative rotation about an upper and lower axis; and a left end frame connected to the left end of the central frame in a manner that allows relative rotation about an upper and lower axis.

[0024] The ends of the right end frame and the left end frame that are opposite to the side connected to the central frame support the planting frame of the right seedling planting unit and the left seedling planting unit in a manner that allows them to swing relative to each other about an upper and lower axis parallel to the upper and lower axes of the left and right sides of the central frame.

[0025] According to this structure, the land preparation rotor can be folded while maintaining the state of the land preparation rotor supported on the land preparation device by taking advantage of the fact that the seedling transplanting device has a folding mechanism and is configured to be foldable.

[0026] That is, when the seedling transplanting device is a folding device, the three-part division of the central frame and the seedling transplanting units on the left and right sides is designed so that the seedling transplanting unit parts on the left and right ends can be folded relative to the central frame part supported by the lifting linkage mechanism. In combination with the above structure, the land preparation rotor also adopts a three-part structure of the central rotating body part and the end rotating body parts on both sides.

[0027] As a result, while the seedling transplanting device is folding, the land preparation rotor is folded while maintaining the state of being supported by the seedling transplanting device.

[0028] Therefore, in the foldable paddy field machine, the tillage rotor can be supported on the seedling planting device without disassembling and assembling the tillage rotor, while the tillage rotor can also be changed into a folded position, which can improve the workability when storing and transporting.

[0029] In this invention, preferably, it comprises: a central drive shaft supporting the central rotating body portion; and end rotating shafts supporting the left and right end rotating body portions, wherein the end rotating shafts are connected to the central drive shaft via a clutch mechanism capable of engagement / disengagement in a manner that allows disengagement of the inter-axis connection relative to the central drive shaft.

[0030] The central drive shaft is supported in a height-adjustable manner on the central frame via a suspension linkage mechanism, and the left and right end rotation shafts are supported in a height-adjustable manner on the left and right seedling planting units via other suspension linkage mechanisms.

[0031] A drive unit that supplies power from the vehicle body to the central drive shaft and causes the suspension linkage mechanism of the central drive shaft to lift and lower is mounted on the central frame.

[0032] According to this structure, the central drive shaft of the central rotating body is supported on the central frame via a suspension linkage mechanism, and the end rotating shafts of the left and right end rotating body parts are supported on the left and right seedling planting units via other suspension linkage mechanisms. Furthermore, the end rotating shafts and the central drive shaft are connected via a clutch mechanism that can engage / disengage to release the shaft connection, and a drive unit that enables the central drive shaft's suspension linkage mechanism to perform lifting and lowering operations is mounted on the central frame.

[0033] Therefore, when the clutch mechanism disconnects the end rotating shaft from the central drive shaft, although the end rotating shaft and the end rotating body are not transmitted rotational power or the lifting power of the drive, they remain in the state of the seedling planting unit suspended on the left and right sides via other suspension linkage mechanisms.

[0034] Therefore, in the foldable paddy field machine, without disassembling and assembling the tillage rotor, the height of the central drive shaft can be adjusted appropriately by the drive to maintain the tillage rotor suspended and supported on the seedling planting device, while the tillage rotor can be easily changed to a folded position, which can further improve the workability when storing and transporting.

[0035] In this invention, it is preferred that the end rotating part is configured such that, when the inter-shaft connection achieved by the clutch mechanism is disengaged, the end rotating part can move to a position lower than the central rotating part.

[0036] According to this structure, the end rotating part is configured to move to a position lower than the central rotating part, so that it can be folded compactly in such a way that the end rotating part drills into the lower side of the central rotating part.

[0037] In this invention, preferably, the seedling transplanting unit includes a land preparation float, and the end rotating part is configured such that, when the inter-axial connection achieved by the clutch mechanism is disengaged, the end rotating part can move to a position lower than the land preparation float.

[0038] According to this structure, the end rotating part is configured to move to a position lower than the land leveling float, so there is no need to move the end rotating part in the front-back direction in order to avoid interference between the end rotating part and the land leveling float in the horizontal direction, and it can be folded compactly.

[0039] In this invention, it is preferred that the central rotating body portion is configured such that, when the inter-shaft connection achieved by the clutch mechanism is disengaged, the central rotating body portion can move to a position above the end rotating body portion.

[0040] According to this structure, the central rotating part is configured to move to a position higher than the end rotating parts. Therefore, the central rotating part can be lifted easily by using a drive that enables the suspension linkage mechanism of the central rotating part to operate in a lifting and lowering manner, and can be compactly folded by climbing the central rotating part to the upper side of the end rotating parts.

[0041] In this invention, preferably, the clutch mechanism is configured to change its on / off state as the posture of the end rotating part relative to the central rotating part changes. The clutch mechanism is configured such that when the rotation axis of the end rotating part is aligned with the rotation axis of the central rotating part, the clutch mechanism is in an engaged / disengaged state; as the rotation axis of the end rotating part changes its posture away from the rotation axis of the central rotating part, the clutch mechanism becomes disengaged.

[0042] When this structure is used, the clutch mechanism can be switched on and off as the posture of the end rotating part changes relative to the central rotating part, making folding operations easier.

[0043] In this invention, preferably, the seedling transplanting device is a ten-row seedling transplanting device having a ten-row seedling carrier.

[0044] According to this structure, the folding operation of the land preparation rotor can be easily performed by folding the larger seedling planting device with a seedling carrier for ten rows. Attached Figure Description

[0045] Figure 1 This is an overall side view of a ride-on rice transplanter.

[0046] Figure 2 This is an overall top view of a ride-on rice transplanter.

[0047] Figure 3 This is an explanatory diagram showing the folded structure of the seedling transplanting device from a top view during the transplanting operation.

[0048] Figure 4 This is a top view showing the folded structure of the seedling transplanting device in its folded state.

[0049] Figure 5 This is a front view showing the supporting structure of the land preparation device relative to the seedling transplanting device.

[0050] Figure 6 It is an exploded perspective view showing the structure of the end rotating part of the rotor used to support the ground leveling.

[0051] Figure 7This is a side view showing the structure of the central rotating part that supports the ground-mounting rotor.

[0052] Figure 8 This is a side view showing the structure of the central rotating part that supports the ground-mounting rotor.

[0053] Figure 9 This is a side view showing the descending and ascending states of the end rotating part of the grounding rotor.

[0054] Figure 10 This is a front view showing the descending and ascending states of the central rotating part and the end rotating parts of the grounding rotor.

[0055] Figure 11 This is a front view showing the central rotating part and the end rotating part of the land preparation rotor in the folded state of the seedling transplanting device. Detailed Implementation

[0056] Hereinafter, an example of an embodiment of the present invention will be described based on the accompanying drawings.

[0057] It should be noted that, unless otherwise specified, the forward and backward directions and left and right directions in this embodiment are described as follows. That is, in the paddy field work machine using this invention, the forward direction of the traveling body during operation (refer to...) Figure 1 , Figure 2 Arrow F in the diagram indicates "forward," and the direction of travel to the backward side (see reference). Figure 1 , Figure 2 Arrow B in the diagram represents "back," which corresponds to the rightward direction based on the forward posture in that forward-backward direction (see reference). Figure 2 The arrow R in the image represents "right," which is equivalent to the direction to the left (see reference). Figure 2 The arrow L in the diagram represents "left".

[0058] [Overall structure of paddy field operation machine]

[0059] Figure 1 This is a side view showing the overall structure of the riding-type rice transplanter, which is the paddy field operation machine of the present invention. Figure 2 This is a top view showing the overall structure of a ride-on rice transplanter.

[0060] Such as these Figure 1 , Figure 2 As shown, the riding-type rice transplanter has a pair of left and right front wheels 1F, 1F at the front of the traveling body 1, which can be turned freely, and a pair of left and right rear wheels 1R, 1R at the rear of the traveling body 1, which serve as drive wheels. This riding-type rice transplanter can move autonomously.

[0061] The rear wheels 1R and 1R are powered by the engine 20 of the power unit 2 located at the front of the machine body. The power of the engine 20 is also transmitted to the fertilizer device 4 (described later) mounted at the rear of the machine body 1 and to the seedling transplanting device 6, which is connected to the rear of the machine frame 10 of the machine body 1 via a lifting linkage mechanism 11 that can swing up and down freely. A land preparation device 5 is provided in front of the seedling transplanting device 6. The land preparation device 5 has a land preparation rotor 50 that is driven to rotate around a rotation axis x1 that is horizontally oriented to the left and right.

[0062] The vehicle body 1 has a driver's unit 3 located behind the power unit 2. In this driver's unit 3, a control unit 31, including a steering wheel 31a, is mounted on the driver's pedal 30 at the front, and a driver's seat 32 is mounted at the rear, allowing the driver to sit in the driver's unit 3 and operate the vehicle. Boarding and alighting steps 35 for getting on and off the ground are located below the two lateral ends of the driver's pedal 30.

[0063] like Figure 2 As shown, on both sides of the engine cover 21, which houses the engine 20 in the power unit 2, there are side pedals 22 connected to the front of the driver's pedal 30. This configuration allows passengers to ride and move from the front of the aircraft via these side pedals 22.

[0064] like Figure 1 , Figure 2 As shown, a seedling placement platform 12 is provided on the lateral outer side of the side pedals 22 on the left and right sides of the front of the driving body 1.

[0065] Marking devices 24 are also provided on both sides of the front of the traveling body 1. Figure 1 , Figure 2 In the process, the marking device 24 is supported in a retracted position that bends upward along the front-rear direction of the vehicle body 1, but when marking the line constituting the driving indicator on the farmland, it is used in a position where the top side of the upward bend is horizontal and extends laterally outward from the vehicle body 1.

[0066] like Figure 2 As shown, the driver's pedal 30 is configured such that the width in the left-right direction is not constant at the position forward of the driver's seat 32, resulting in a difference between the front and back sections. Specifically, the width in the left-right direction of the driver's pedal 30 at the position slightly behind the driver's seat 32 is wider than the width in the left-right direction of the driver's pedal 30 at the position slightly forward of the driver's seat 32. Consequently, there is a narrower section 33 at the position slightly forward of the driver's seat 32, and a wider section 34 at the position slightly behind the driver's seat 32, which is wider in the left-right direction than the narrower section 33.

[0067] More specifically, the lateral width of the narrow portion 33 is approximately the same as or slightly wider than the distance between the outermost edges of the side pedals 22 located on both sides of the power unit 2. The wide portion 34 is set to a width that is wider than the narrow portion 33, wider than the lateral width of the hopper 40 of the fertilizer device 4 located on the back of the driver's seat 32, and does not exceed the lateral width of the seedling platform 60 of the seedling transplanting device 6, which has a seedling loading capacity of ten rows.

[0068] The riding-type rice transplanter includes a fertilizer applicator 4, which serves as an example of an agricultural supply device.

[0069] The fertilizer applicator 4 includes: a hopper 40 for storing powdered fertilizer, which is an example of an agricultural material; a delivery unit 41 for discharging the stored fertilizer from the hopper 40 in predetermined amounts; a conveying hose 42 for conveying the discharged fertilizer; and a furrow opener 43 for guiding the supplied fertilizer to the farmland as a ground supply unit.

[0070] The hopper 40 is a component consisting of five container units with a space for containing powdered fertilizer arranged in a row in the left-right direction. It is located on the back side of the driver's seat 32 and at the rear end of the vehicle body 1.

[0071] [Seedling transplanting device]

[0072] like Figure 1 , Figure 2 As shown, the seedling transplanting device 6, as an example of a ground-operating device, is connected to the rear end of the lifting linkage mechanism 11.

[0073] The front end of the planting frame 61 of the seedling planting device 6 is connected to the rear end of the lifting linkage mechanism 11. The seedling planting device 6 includes: ten seedling planting mechanisms 62 arranged in a row in the transverse direction of the traveling body at the rear of the planting frame 61; a seedling platform 60 located above the planting frame 61; and five grounding floats 63 arranged in the transverse direction of the traveling body and mounted on the lower part of the planting frame 61. The seedling planting device 6 is configured as a ten-row seedling planting device.

[0074] The seedling carrier 60 has ten seedling placement sections 60a arranged laterally on the traveling body and holding pad-shaped seedlings. The seedling carrier 60 is supported on its front side (corresponding to the back side of the seedling placement section 60a) by a seedling carrier support frame 65 erected from the planting frame 61, and is configured to move freely back and forth laterally on the body. The seedling carrier 60 is reciprocated and moved in conjunction with the seedling planting action of the seedling planting mechanism 62, supplying seedlings from the seedling placement sections 60a to each seedling planting mechanism 62.

[0075] Engine power is transmitted from the side of the driving body 1 to the seedling transplanting device 6 via the transplanting drive shaft 13. A pesticide dispensing device 64 for distributing pesticides to the farmland after seedling transplanting is installed at the rear of the seedling transplanting device 6.

[0076] When the seedling transplanting device 6 is in the lowering operation state, each grounding float 63 is grounded to the surface of the farmland to support the seedling transplanting device 6 so that the seedling transplanting depth of each seedling transplanting mechanism 62 reaches the specified depth, and the land near the seedling transplanting position of the seedling transplanting mechanism 62 is prepared.

[0077] Each grounding float 63 is equipped with a trencher 43, which opens a trench to guide the fertilizer supplied to the self-fertilizing device 4 to the mud surface and bury it.

[0078] The seedling transplanting device 6 has seedling transplanting units 6R and 6L on the right and left sides in the left-right direction. The seedling transplanting units 6R and 6L are composed of a combination of multiple seedling placement parts 60a, multiple seedling transplanting mechanisms 62 and a transplanting frame 61. The multiple seedling placement parts 60a are arranged in a horizontal row along the left-right direction. The multiple seedling transplanting mechanisms 62 are arranged in a manner corresponding to the seedling placement parts 60a. The transplanting frame 61 supports the seedling placement parts 60a and the seedling transplanting mechanisms 62.

[0079] Each seedling planting unit 6R and 6L is connected to the lifting linkage mechanism 11 via the folding mechanism 7.

[0080] like Figure 3 and Figure 4 As shown, the folding mechanism 7 includes: a central frame 70C supported by a lifting linkage mechanism 11; a right end frame 70R connected to the right end of the central frame 70C in a manner that allows relative rotation about the upper and lower axes y1; and a left end frame 70L connected to the left end of the central frame 70C in a manner that allows relative rotation about the upper and lower axes y2.

[0081] Furthermore, at the ends of the right end frame 70R and the left end frame 70L that are opposite to the side connected to the central frame 70C, the planting frames 61 and 61 in the right seedling planting unit 6R and the left seedling planting unit 6L are supported in such a way that they can swing relative to each other around the upper and lower axes y3 and y4 that are parallel to the aforementioned upper and lower axes y1 and y2.

[0082] [Land preparation equipment]

[0083] The land preparation device 5, which is located in front of the seedling transplanting device 6, will be described.

[0084] The land preparation device 5 is used to level the unevenness and clods of the mud surface at a position in front of the grounding float 63 of the seedling planting device 6 in the direction of travel. It includes: a land preparation rotor 50, which is driven to rotate around a left-right lateral rotation axis x1; a land preparation drive shaft 14, which transmits power to the land preparation rotor 50; and a lifting mechanism 54, which changes the height of the land preparation rotor 50 above the ground.

[0085] The grounding rotor 50 includes: a central rotating body portion 50C located in the center in the left-right direction; and end rotating body portions 50R and 50L arranged on the left and right sides in the direction along the rotation axis x1 of the central rotating body portion 50C. A grounding drive shaft 14 extending from the side of the traveling body 1 is connected to the central rotating body portion 50C, and the power of the engine 20 is transmitted to the central rotating body portion 50C.

[0086] like Figure 6 and Figure 10 , Figure 11 As shown, the central rotating body portion 50C and the end rotating body portions 50R and 50L include: a central drive shaft 51C that supports the central rotating body portion 50C; and end rotating shafts 51R and 51L that support the left and right end rotating body portions 50R and 50L.

[0087] These central drive shafts 51C and end rotating shafts 51R and 51L are constructed from square shafts with a rectangular cross-section that is approximately square. A plurality of solid-state rotating bodies 52 made of synthetic resin, each having square-shaped fitting holes 52a, are fitted into the central drive shaft 51C and end rotating shafts 51R and 51L, which are constructed from these square shafts. Thus, the central drive shaft 51C and the central rotating body portion 50C are configured to rotate integrally, and the left and right end rotating body portions 50R and 50L are configured to fit into the end rotating shafts 51R and 51L and rotate integrally.

[0088] The grounding drive shaft 14 and the central drive shaft 51C are linked together via a bevel gear transmission mechanism (not shown). The central drive shaft 51C and the end rotating shafts 51R and 51L are connected by a clutch 53 located at the ends of their shafts, and the clutches are engaged and disengaged by relative axial movement, switching between the power transmission state and the disengagement state.

[0089] Since the grounding rotor 50 is not subjected to a large driving load as that used for driving wheels, the engagement amount between the central drive shaft 51C side and the end rotating shafts 51R and 51L side in the engagement clutch 53 is set to be relatively shallow. Therefore, when the right end frame 70R and the left end frame 70L are rotated relative to the central frame 70C around the upper and lower axes y1 and y2 by the folding mechanism 7 to change to a folded storage posture, the engagement clutch 53 changes from an engaged state to an disengaged state in conjunction with this action, cutting off the power transmission from the central drive shaft 51C to the end rotating shafts 51R and 51L.

[0090] When the right end frame 70R and the left end frame 70L, which are in a folded and stored position, are rotated relative to the central frame 70C in the opposite direction to the previous position around the upper and lower axes y1 and y2, so as to return to the extended position where the axis of the end rotation shafts 51R and 51L is aligned with the rotation axis x1 of the central drive shaft 51C, the engagement clutch 53 returns to the engagement state and performs power transmission from the central drive shaft 51C to the end rotation shafts 51R and 51L.

[0091] [Suspension support structure for the rotor used for ground leveling]

[0092] The lifting mechanism 54 for changing the ground height of the grounding rotor 50 includes: a central suspension linkage mechanism 54C (equivalent to a suspension linkage mechanism) supporting the central drive shaft 51C; end suspension linkage mechanisms 54R and 54L (equivalent to other suspension linkage mechanisms) supporting the left and right end rotation shafts 51R and 51L; and a driver 55 for lifting the central suspension linkage mechanism 54C.

[0093] The aforementioned central drive shaft 51C is supported on the central frame 70C in a lifting manner via the central suspension linkage mechanism 54C, and the left and right end rotating shafts 51R and 51L are supported on the left and right seedling planting units 6R and 6L in a lifting manner via the end suspension linkage mechanisms 54R and 54L.

[0094] The central suspension linkage 54C and the end suspension linkages 54R and 54L support the two ends of the central drive shaft 51C and the two ends of the end rotation shafts 51R and 51L via a pair of left and right curved linkage members 56. The curved linkage member 56 has a boss 56a with a bearing at its lower end.

[0095] The curved connecting rod member 56 has its fixed end, which is opposite to the boss portion 56a, fixed to the central frame 70C at both ends of the central drive shaft 51C, and fixed to the insertion frame 61 at both ends of the end rotation shafts 51R and 51L.

[0096] The central suspension linkage mechanism 54C transmits operating power to the drive 55, which is composed of an electric motor fixed to the seedling support frame 65. The rotation of the drive 55 is transmitted to the bending linkage member 56 via the sector gear 55a, double-arm crank 55b, and operating lever 55c, enabling the raising and lowering operation of the central drive shaft 51C. The middle position of the double-arm crank 55b is fixed to the linkage operating shaft 57, which simultaneously operates the left and right sides of the central suspension linkage mechanism 54C.

[0097] At both ends of the connecting rod operating shaft 57 and at its opposite ends along the axial direction, the opposing ends of the operating linkage shafts 58 and 58 of the connecting rod mechanisms 54R and 54L are suspended, and engaging mechanisms 59 are provided so that they engage and rotate as a single unit when brought close together. When the connecting rod operating shaft 57 and the operating linkage shafts 58 and 58 are separated, the engaging mechanism 59 disengages (see reference). Figure 10 The operating linkage shafts 58 and 58 can rotate freely.

[0098] In other words, when the end rotating parts 50R and 50L, and the end suspension linkage mechanisms 54R and 54L are moved laterally away from the central rotating part 50C and the central suspension linkage mechanism 54C, the engagement clutch 53 is disengaged, and the linkage achieved by the engagement mechanism 59 is released.

[0099] The engagement / disengagement of the linkage operating shaft 57 and the operating linkage shafts 58, 58, implemented by the engagement mechanism 59, is also carried out in the same manner as the engagement and disengagement of the clutch 53. That is, engagement / disengagement is achieved by the rotation of the right end frame 70R and the left end frame 70L relative to the central frame 70C around the upper and lower axes y1, y2, implemented by the folding mechanism 7.

[0100] Thus, with the engagement clutch 53 disengaged and the linkage achieved by the engagement mechanism 59 released, by rotating the right end frame 70R and the left end frame 70L, which support the seedling planting units 6R and 6L on the left and right sides, around the upper and lower axes y1, y2 and y3, y4, the seedling planting units 6R and 6L on the left and right sides can be moved from... Figure 3 The work statuses arranged in a horizontal row shown are folded as follows: Figure 4 The storage status shown.

[0101] In this folded state, such as Figure 11 As shown, the end rotating parts 50R and 50L are in a state of being drilled into the central rotating part 50C and are in a state of being tightly folded.

[0102] The reason why the end rotating parts 50R and 50L can be moved to such a lower position is that the linkage achieved by the engaging mechanism 59 is released, and the operating linkage shafts 58 and 58, which are no longer engaged with the connecting rod operating shaft 57, are in a free-rotating state. In other words, this is because they are lifted together with the connecting rod operating shaft 57 by the drive of the driver 55. Figure 9 The end suspension linkages 54R and 54L, as shown by the virtual line, are disengaged from the linkage operating shaft 57 and are in a state of significant downward sag. Figure 9 The state indicated by the solid line.

[0103] [Other Implementation Methods]

[0104] Other embodiments will be described below. Multiple combinations of the following embodiments may be used as long as no conflict occurs. It should be noted that the scope of this invention is not limited to these embodiments.

[0105] (1) In the above embodiment, the following structure is shown as an example: the engagement amount of the engagement clutch 53 and the engagement mechanism 59 is set to be shallow so that the engagement clutch 53 and the engagement / disengagement of the engagement mechanism 59 can be performed as the right end frame 70R and the left end frame 70L rotate relative to the central frame 70C around the upper and lower axes y1 and y2. However, it is not limited to this structure. The engagement amount can also be set to be deep, and the end rotating shafts 51R and 51L and the operating linkage shafts 58 and 58 can be pulled out laterally by manual operation, thereby enabling the engagement of the engagement clutch 53 and the engagement / disengagement of the engagement mechanism 59.

[0106] Other structures can use the same structure as the above-described implementation method.

[0107] (2) In the above embodiments, a central rotating body portion 50C and an end rotating body portion 50R and 50L are shown, which are constructed by forming a central drive shaft 51C and an end rotating shaft 51R and 51L with square shafts and transmitting rotational power to the ground rotating body 52, but are not limited to this construction.

[0108] For example, the ground-mounting rotating body 52 can be directly bonded to the central drive shaft 51C and the end rotating shafts 51R and 51L, or a shaft with a cross-sectional shape other than a square shaft can be used.

[0109] Other structures can use the same structure as the above-described implementation method.

[0110] (3) In the above embodiment, an example is shown of a folding structure in which the end rotating parts 50R and 50L are inserted into the lower side of the central rotating part 50C, but it is not limited to this structure. For example, it is also possible to fold the end rotating parts 50R and 50L in a state of climbing up to the upper side of the central rotating part 50C.

[0111] Other structures can use the same structure as the above-described implementation method.

[0112] (4) In the above embodiments, the driver 55, which constitutes the driving source of the lifting mechanism 54, is shown to be an example of using an electric motor, but it is not limited to this structure and may also be configured to use, for example, a hydraulic cylinder, an electric cylinder, etc.

[0113] Other structures can use the same structure as the above-described implementation method.

[0114] (5) In the above embodiment, an example is shown in which the positions of the end rotating parts 50R and 50L are lowered during folding without changing the position of the central rotating part 50C, but this is not limited to this. For example, it is also possible to raise or lower the position of the central rotating part 50C without changing the position of the end rotating parts 50R and 50L.

[0115] Other structures can use the same structure as the above-described implementation method.

[0116] (6) In the above embodiment, it is shown that the driver 55 constituting the drive source of the lifting mechanism 54 is only provided at the position where the central suspension linkage mechanism 54C that performs the lifting of the central rotating body part 50C is functioning, but it is not limited to this configuration. For example, it may also be provided at the position where the end suspension linkage mechanisms 54R and 54L that perform the lifting of the end rotating body parts 50R and 50L are functioning.

[0117] Other structures can use the same structure as the above-described implementation method.

[0118] (7) In the above embodiments, the driver 55, which constitutes the driving source of the lifting mechanism 54, is shown to be an example of using an electric motor, but it is not limited to this structure and may also be configured to use, for example, a hydraulic cylinder, an electric cylinder, etc.

[0119] Other structures can use the same structure as the above-described implementation method.

[0120] (8) In the above embodiments, an example is shown of a structure in which the central rotating part 50C and the end rotating parts 50R and 50L are supported on the seedling planting device 6 via the folding mechanism 7, but it is not limited to this structure.

[0121] For example, although not shown, the end rotating parts 50R and 50L can be configured to separate from the central rotating part 50C without passing through the folding mechanism 7.

[0122] Other structures can use the same structure as the above-described implementation method.

[0123] Industrial availability

[0124] This invention is not limited to rice transplanters for ten-row planting, but can also be applied to rice transplanters for eight-row planting (less than ten rows) or rice transplanters with more than ten rows.

[0125] Explanation of reference numerals in the attached figures

[0126] 1: The running gear;

[0127] 5: Ground preparation equipment;

[0128] 6R, 6L: Seedling transplanting unit;

[0129] 7: Folding mechanism;

[0130] 11: Lifting linkage mechanism;

[0131] 50: Rotor for land preparation;

[0132] 50C: Central rotating part;

[0133] 50R, 50L: End rotating body part;

[0134] 51C: Central drive shaft;

[0135] 51R, 51L: End rotating shafts;

[0136] 53: Clutch mechanism;

[0137] 54C: Suspension linkage mechanism;

[0138] 54R, 54L: Other suspension linkage mechanisms;

[0139] 55: Driver;

[0140] 60a: Seedling placement section;

[0141] 61: Planting frame;

[0142] 62: Seedling transplanting mechanism;

[0143] 63: Floating boards for land preparation;

[0144] 70C: Central frame;

[0145] 70R: Right end frame;

[0146] 70L: Left end frame;

[0147] y1: Top and bottom axes;

[0148] y2: Top and bottom axes;

[0149] y3, y4: Upper and lower axes;

[0150] x1: Rotation axis.

Claims

1. A paddy field operation machine, characterized in that, Equipped with: The seedling transplanting device is connected to and supported at the rear of the traveling machine via a lifting linkage mechanism; and The soil-preparing rotor is driven to rotate around a horizontal axis in front of the seedling planting device. The seedling transplanting device includes a seedling transplanting unit that can be divided into a right and a left side in the left-right direction. Each seedling transplanting unit consists of a combination of multiple seedling placement sections, multiple seedling transplanting mechanisms, and a transplanting frame. The multiple seedling placement sections are arranged in a horizontal row along the left-right direction. The multiple seedling transplanting mechanisms are arranged corresponding to the seedling placement sections. The transplanting frame supports the seedling placement sections and the seedling transplanting mechanisms. The seedling planting unit is connected to the lifting linkage mechanism. The land leveling rotor includes: a central rotating body portion located at the center in the left-right direction; and end rotating body portions disposed on the left and right sides along the rotation axis of the central rotating body portion. The land leveling rotor is configured such that the left and right end rotating body portions can be separated relative to the central rotating body portion. The central rotating body is supported by the lifting linkage mechanism, and the left and right end rotating bodies are supported by the corresponding seedling planting units on the left and right sides. The seedling planting unit is connected to the lifting linkage mechanism via a folding mechanism. The folding mechanism includes: a central frame supported by the lifting linkage mechanism; a right end frame connected to the right end of the central frame in a manner that allows relative rotation about an upper and lower axis; and a left end frame connected to the left end of the central frame in a manner that allows relative rotation about an upper and lower axis. The ends of the right end frame and the left end frame that are opposite to the side connected to the central frame support the planting frame of the right seedling planting unit and the left seedling planting unit in a manner that allows them to swing relative to each other about an upper and lower axis parallel to the upper and lower axes of the left and right sides of the central frame.

2. The paddy field operation machine according to claim 1, characterized in that, It has a central drive shaft and end rotating shafts. The central drive shaft supports the central rotating body portion, and the end rotating shafts support the left and right end rotating body portions. The end rotating shafts are connected to the central drive shaft via a clutch mechanism that can engage / disengage, so as to disengage the shaft connection relative to the central drive shaft. The central drive shaft is supported in a height-adjustable manner on the central frame via a suspension linkage mechanism, and the left and right end rotation shafts are supported in a height-adjustable manner on the left and right seedling planting units via other suspension linkage mechanisms. A drive unit that supplies power from the vehicle body to the central drive shaft and causes the suspension linkage mechanism of the central drive shaft to lift and lower is mounted on the central frame.

3. The paddy field operation machine according to claim 2, characterized in that, The end rotating part is configured such that, when the inter-shaft connection achieved by the clutch mechanism is disengaged, the end rotating part can move to a position lower than the central rotating part.

4. The paddy field operation machine according to claim 2 or 3, characterized in that, The seedling transplanting unit is equipped with a floating platform for land preparation. The end rotating part is configured such that, when the inter-shaft connection achieved by the clutch mechanism is disengaged, the end rotating part can move to a position lower than the grounding float.

5. The paddy field operation machine according to claim 2, characterized in that, The central rotating part is configured such that, when the inter-shaft connection achieved by the clutch mechanism is disengaged, the central rotating part can move to a position above the end rotating part.

6. The paddy field operation machine according to claim 2 or 3, characterized in that, The clutch mechanism is configured to change its on / off state as the posture of the end rotating part relative to the central rotating part changes. The clutch mechanism is configured such that when the rotation axis of the end rotating body portion is aligned with the rotation axis of the central rotating body portion, the clutch mechanism is in a engaged / disengaged state; as the rotation axis of the end rotating body portion changes orientation away from the rotation axis of the central rotating body portion, the clutch mechanism becomes disengaged.

7. The paddy field operation machine according to any one of claims 1 to 3, characterized in that, The seedling transplanting device is a ten-row seedling transplanting device with a seedling carrier for ten rows.

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