Transplant machine

Abstract

The present invention provides a transplanting machine (3) comprising: a planting device (39) for planting seedlings (N) into a field; a seedling supply device (38) for supplying seedlings to the planting device; and a seedling platform (190) for holding a seedling tray (189), the seedling tray (189) containing the seedlings supplied to the seedling supply device. The seedling tray has a plurality of receiving recesses (189a) arranged in a longitudinal and transverse direction on its upper surface, each capable of individually holding a seedling, and a groove (189b) formed between adjacent receiving recesses and extending along the aforementioned parallel direction on its lower surface. The seedling platform has: a holding portion (190a) for holding the seedling tray; and a guide portion (190b) for guiding the movement of the seedling tray on the holding portion. The guide portion is provided to protrude upward compared to the holding portion, and enters the groove and extends along the groove when the seedling tray is placed on the holding portion.

Description

Technical Field

[0001] This invention relates to a transplanting machine, for example, for planting seedlings in a field. Background Technology

[0002] Previously, there was a known transplantation device disclosed in Patent Document 1.

[0003] The transplanting machine disclosed in Patent Document 1 is installed at the rear of a rotary tiller connected to a tractor. The transplanting machine includes: a seedling supply device having multiple supply cups for receiving seedlings; and a planting device for planting the seedlings supplied by the seedling supply device into the field. A seedling platform is provided above the seedling supply device. Seedling trays are placed on the seedling platform, and seedlings from the seedling trays are supplied to the seedling supply device, whereby the planting device transplants the seedlings into the field.

[0004] During transplanting operations, a seedling transport vehicle carrying seedling trays accompanies the transplanting machine. If there are no more seedlings on the seedling platform, the tractor is temporarily stopped, and the seedling trays from the transport vehicle are transferred to the seedling platform of the transplanting machine.

[0005] In addition, the supply cup has a bottom cover that can be opened and closed freely. By opening the bottom cover, the seedlings inside the supply cup fall into the planting device.

[0006] Prior art literature

[0007] Patent documents

[0008] Patent Document 1: Japanese Patent Publication No. 2019-208412 Summary of the Invention

[0009] The problem that the invention aims to solve

[0010] In the transplanting machine described in Patent Document 1, the tractor must be stopped in order to place the seedling trays on the seedling platform, thus stopping the transplanting operation, reducing the efficiency of the operation, and making it impossible to supply seedling trays quickly.

[0011] In addition, in the transplanting machine described in Patent Document 1, the bottom cover of the supply cup sometimes swings while it is open, which may cause the seedling to come into contact with the bottom cover when it falls, resulting in an unstable seedling falling.

[0012] Therefore, in view of the above-mentioned problems, the present invention aims to provide a transplanting machine that can rapidly supply seedling trays to seedling loading platforms without stopping the transplanting operation.

[0013] In addition, in view of the above-mentioned problems, the present invention aims to provide a transplanting machine that can stabilize the falling of the seedling by preventing the bottom cover of the supply cup that contains the seedling and supplies it to the planting device from swinging when the bottom cover is opened.

[0014] Solution for solving the problem

[0015] One aspect of the transplanting machine of the present invention includes: a planting device for planting seedlings in a field; a seedling supply device for supplying seedlings to the planting device; and a seedling platform for holding a seedling tray, the seedling tray receiving the seedlings supplied to the seedling supply device; the seedling tray having a plurality of receiving recesses arranged in a longitudinal and transverse direction on its upper surface for individually receiving seedlings, and having a groove on its lower surface formed between adjacent receiving recesses and extending along the transverse direction; the seedling platform having a mounting portion for holding the seedling tray and a guide portion for guiding the movement of the seedling tray on the mounting portion, the guide portion being provided to protrude upward compared to the mounting portion, entering the groove and extending along the groove when the seedling tray is placed on the mounting portion.

[0016] In addition, the aforementioned guide extends along a width direction orthogonal to the front-back direction of the transplanting machine and guides the movement of the aforementioned seedling tray on the aforementioned mounting part in the aforementioned width direction.

[0017] In addition, the aforementioned guide extends from one end of the aforementioned seedling platform in the width direction to the other end.

[0018] In addition, the aforementioned seedling platform has a frame that is quadrilateral when viewed from above, and the aforementioned guide portion connects the two opposite sides of the aforementioned frame.

[0019] In addition, the transplanting machine is equipped with a chair for the operator to sit on when the seedling is supplied to the seedling supply device. The chair includes a front chair located in front of the seedling supply device and a rear chair located behind the seedling supply device. The seedling platform is arranged above the seedling supply device and between the front chair and the rear chair, and the guide extends along the width direction.

[0020] In addition, the above-mentioned seedling platform includes a plurality of seedling platforms arranged in a vertical direction, and a footboard is provided on the outer side of the above-mentioned seedling platform in the width direction and at a position higher than the ground. The footboard can be climbed by the operator when the above-mentioned seedling tray is placed on the above-mentioned seedling platform.

[0021] One aspect of the transplanting machine of the present invention comprises: a planting device for planting seedlings in a field; and a seedling supply device for supplying seedlings to the planting device; the seedling supply device having a seedling supply cup for receiving seedlings and causing them to fall onto the planting device, the seedling supply cup having: a cylindrical cup body having a seedling receiving port at the upper part and a seedling falling port at the lower part; a bottom cover capable of closing or opening the falling port; a hinge portion for connecting the bottom cover to the cup body in an openable and closable manner; a force-applying member for applying force to the bottom cover in the direction of opening the falling port; and a limiting portion for limiting the position of the bottom cover when it is open.

[0022] In addition, the aforementioned limiting portion has: a raised portion formed on the outer peripheral surface of the cup body; and an abutting portion formed on the bottom cover, which abuts against the raised portion when the bottom cover is opened.

[0023] In addition, the aforementioned force-applying component is positioned on the outside of the aforementioned drop opening.

[0024] In addition, the hinge portion is located on the outside of the drop opening.

[0025] In addition, a hinge support portion for supporting the hinge portion and a reinforcing rib for strengthening the hinge support portion are provided on the outer peripheral surface of the cup body. The reinforcing rib includes a first reinforcing rib provided on one end of the hinge shaft and a second reinforcing rib provided on the other end of the hinge shaft.

[0026] In addition, the seedling supply device includes: a conveying mechanism for conveying the seedling supply cup along a conveying path that is viewed as a ring; an inner member disposed on the inner side of the conveying path along the conveying path; and an outer member disposed on the outer side of the conveying path along the conveying path; the seedling supply cup has a guide portion for guiding the conveying of the seedling supply cup along the conveying path, the guide portion including an inner guide portion that abuts against the inner member and an outer guide portion that abuts against the outer member.

[0027] In addition, the aforementioned inner guide portion has a first portion that abuts against the lower surface of the aforementioned inner member, and a second portion that abuts against the aforementioned conveying path side surface of the aforementioned inner member.

[0028] The effects of the invention

[0029] According to the above structure, since the seedling tray can slide along the guide, the seedling tray can be quickly supplied to the seedling platform without stopping the transplanting operation.

[0030] Furthermore, according to the above structure, since the opening position of the bottom cover is determined by the force-applying member and the limiting part, it can prevent the seedling from contacting the bottom cover when it falls, thus ensuring the stability of the seedling's fall. Attached Figure Description

[0031] Figure 1 This is a side view of the machine.

[0032] Figure 2 This is a side view of the ground-based work equipment.

[0033] Figure 3 This is a top view of the ground-based work equipment.

[0034] Figure 4 This is a structural diagram showing the power transmission system of the work machine.

[0035] Figure 5 This is a side view showing the planting device of the transplanting machine, etc.

[0036] Figure 6 This is a top view of the planting device.

[0037] Figure 7 This is a 3D view of the seedling tray.

[0038] Figure 8 This is a three-dimensional view of an example of a seedling tray.

[0039] Figure 9 This is a top view of the right half of the seedling platform.

[0040] Figure 10 yes Figure 9 A sectional view along line AA.

[0041] Figure 11 This is a top view of the seedling tray.

[0042] Figure 12 This is a top view of the seedling supply device.

[0043] Figure 13 This is a diagram illustrating the bottom cover and opening position of the seedling supply device.

[0044] Figure 14 This is a perspective view of a portion of the seedling supply device as seen from below.

[0045] Figure 15 This is a three-dimensional diagram of the seedling supply cup.

[0046] Figure 16 This is a three-dimensional diagram of the seedling supply cup, showing the bottom cover in both closed and open states.

[0047] Figure 17 This is a top view of the seedling supply cup.

[0048] Figure 18 This is a cross-sectional view of the seedling supply cup.

[0049] Figure 19 It is a diagram showing the positional relationship between the seedling supply cup and the planting tool. Detailed Implementation

[0050] Hereinafter, one embodiment of the present invention will be described with appropriate reference to the accompanying drawings.

[0051] Figure 1A work machine 1 is shown that is capable of planting (transplanting) seedlings while traveling and performing ground operations (such as tilling). The work machine 1 has a traveling body 1A and a ground operation device 1B installed at the rear of the traveling body 1A. The ground operation device 1B includes a first ground operation machine 2 that is vertically mounted at the rear of the traveling body 1A and a second ground operation machine 3 that is vertically mounted at the rear of the first ground operation machine 2.

[0052] In this embodiment, a tractor is exemplified as the traveling body 1A. A rotary tiller is exemplified as the first field work machine 2. A transplanter for planting seedlings in a field is exemplified as the second field work machine 3. Hereinafter, the traveling body will be referred to as tractor 1A, the first field work machine as rotary tiller 2, and the second field work machine as transplanter 3.

[0053] Furthermore, the traveling body 1A is not limited to a tractor, but can also be other types of vehicles. Additionally, the first field tiller 2 is not limited to a rotary tiller; any machinery that operates on the field can be used. Furthermore, although the rotary tiller 2 is exemplified as a centrally driven rotary tiller, it can also be a side-driven rotary tiller.

[0054] Figure 1 This is a side view showing the working machine 1. In this embodiment, unless otherwise stated, the view is taken from the front side of the driver's seat 5, which is located on the tractor 1A. Figure 1 The left side is in front, and the rear side of the driver is behind. Figure 1 The right side is the rear, and the driver's left side is the rear. Figure 1 The front side) is to the left, and the driver's right side ( Figure 1 The inner side) will be described as the right side. Additionally, the direction K1 relative to the tractor 1A (refer to...) will be used. Figure 1 The horizontal direction of the orthogonal direction K2 (refer to) Figure 3 (K2 is used as an example for the width direction of the machine.)

[0055] Furthermore, the direction from the center of the tractor 1A in the width direction toward the right or left will be described as the outer direction of the tractor 1A. In other words, the outer direction of the tractor 1A refers to the direction away from the center of the tractor 1A in the width direction K2. The direction from the right or left of the tractor 1A toward the center in the width direction will be described as the inner direction of the tractor 1A. That is, the inner direction of the tractor 1A refers to the direction opposite to the outer direction of the tractor 1A. In other words, the inner direction of the tractor 1A refers to the direction closer to the center of the tractor 1A in the width direction K2.

[0056] like Figure 1As shown, the tractor 1A has a body 6 and a running gear 7, which includes a front wheel 7F mounted at the front of the body 6 and a rear wheel 7R mounted at the rear of the body 6. The body 6 has a prime mover (drive source) E1 and a power transmission box T1 connected to the rear of the prime mover E1. The prime mover E1 drives the running gear 7.

[0057] The prime mover E1 is, for example, a diesel engine. Alternatively, the prime mover E1 can be a gasoline engine, an LPG engine, or an electric motor, or it can be a hybrid system with both an engine and an electric motor.

[0058] The power transmission box T1 is constructed by directly connecting a clutch housing with a built-in clutch, a gearbox with a built-in transmission device, and a differential box with a built-in differential device.

[0059] A driver's seat 5 is mounted at the rear of the vehicle body 6, and a power extraction shaft (PTO shaft) 22 for extracting power from the prime mover E1 is mounted protruding rearward. That is, the traveling body 1A has a power extraction shaft 22 for extracting power from the prime mover E1. A steering wheel 8 is located in front of the driver's seat 5. Additionally, a battery (not shown) is mounted at the front of the tractor 1A.

[0060] like Figure 1 As shown, the rotary tiller 2 is mounted vertically at the rear of the tractor 1A via a three-point linkage mechanism 9 and other mounting mechanisms. The three-point linkage mechanism 9 has an upper link 9A and a lower link 9B, and is mounted at the rear of the vehicle body 6. A lifting link 10A capable of vertical movement is provided at the rear of the vehicle body 6, and the lifting link 10A is connected to the lower link 9B via a lifting rod 10B. The lifting link 10A is driven to move up and down by a hydraulic device 10C located at the upper rear of the vehicle body 6. The vertical movement of the lifting link 10A causes the lower link 9B to move up and down. Thus, the rotary tiller 2 is raised and lowered.

[0061] The rotary tiller 2 has a transmission box 12 that receives power from the PTO shaft 22 of the tractor 1A via a universal joint (not shown). The transmission box 12 is located at the center of the rotary tiller 2 in the width direction (the same direction as the machine width direction K2).

[0062] Figure 2 and Figure 3 This is a detailed drawing of the ground operation device 1B.

[0063] The rotary tiller 2 has a rotating frame 11, and the transplanter 3 has a transplanter frame 37. The rotating frame 11 and the transplanter frame 37 are connected vertically by a connecting mechanism 41 composed of a parallel linkage mechanism.

[0064] In the rotary tiller 2, the aforementioned transmission box 12 is located at the center of the rotary frame 11 in the width direction K2. A rotating shaft 16 protrudes from the lower part of the transmission box 12 in one and the other directions in the width direction K2, and this rotating shaft 16 has an axis in the width direction K2. Multiple plow claws (not shown) are fixed to the outer periphery of the rotating shaft 16 via brackets. By rotating the rotating shaft 16 around its axis, the plow claws plow (cultivate) the field and discard the plowed soil towards the rear cover 19B. These rotating shafts 16 and plow claws constitute the tillage section 18 for cultivating the field.

[0065] Soil collection discs 56L and 56R are located at the front of the rotary tiller 2. Soil collection discs 56L and 56R are components used to move soil towards the tillage section 18 inwards towards the machine width. Soil collection disc 56L is located on one side (left side) in the machine width direction, at the left front of the rotary tiller 2. Soil collection disc 56R is located on the other side (right side) in the machine width direction, at the right front of the rotary tiller 2. Viewed from above, soil collection discs 56L and 56R are arranged obliquely as they move from the front to the rear and from outside the machine width towards the inside of the machine width.

[0066] The rotary tiller 2 is equipped with a ridge-forming device A located behind the tillage section 18. The ridge-forming device A is a device that forms ridges in the field tilled by the tillage section 18. In this embodiment, two ridges are formed, but the number of ridges formed is not limited to two.

[0067] The tiller 1, as a field-operating device 1B, includes a mulch film laying device 300 for laying mulch film on ridges formed in the field. The mulch film laying device 300 is mounted on the rotary tiller 2. The mulch film laying device 300 is positioned behind the rotary tiller 2 and in front of the transplanter 3.

[0068] The mulch film laying device 300 includes: a support shaft 301 for supporting the mulch film roll, a pressing roller 331 for pressing down the end of the laid mulch film, and a soil covering member 321 for covering the end of the mulch film bent by the pressing roller 331 with soil.

[0069] like Figure 2 As shown, the transplanting machine 3 constituting the ground-operating device 1B has a transplanting unit 36 ​​installed on the transplanting machine frame 37. The transplanting unit 36 ​​includes a seedling supply device 38, a planting device 39 installed below the seedling supply device, and a soil-covering device 40 installed behind the planting device 39. A seedling platform 190 is provided above the seedling supply device 38. The seedling platform 190 is mounted on a frame 132 erected on the transplanting machine frame 37. The seedling platform 190 carries... Figure 8 Seedling tray 189 is shown. Seedling tray 189 contains... Figure 19 Seedling N is shown.

[0070] like Figure 3 As shown, the transplantation machine 3 has multiple transplantation units (first transplantation unit 36A, second transplantation unit 36B). The first transplantation unit 36A is located on one side (left side) of the transplantation machine 3 in the width direction K2. The second transplantation unit 36B is located on the other side (right side) of the transplantation machine 3 in the width direction K2.

[0071] The first transplanting unit 36A and the second transplanting unit 36B are connected by a connecting frame 130. The first transplanting unit 36A and the second transplanting unit 36B are located above each of the multiple ridges formed by the ridge forming device A.

[0072] The first transplanting unit 36A has a frame (referred to as the first frame) 37A, a seedling supply device (referred to as the first seedling supply device) 38A, multiple planting devices (referred to as the first planting devices) 39A, and a number of soil covering devices (referred to as the first soil covering devices) 40A corresponding to the number of planting devices 39A. The first seedling supply device 38A, the first planting device 39A, and the first soil covering devices 40A are mounted on the first frame 37A.

[0073] The second transplanting unit 36B has a frame (referred to as the second frame) 37B, a seedling supply device (referred to as the second seedling supply device) 38B, multiple planting devices (referred to as the second planting devices) 39B, and a number of soil covering devices (referred to as the second soil covering devices) 40B corresponding to the number of planting devices 39B. The second seedling supply device 38B, the second planting device 39B, and the second soil covering device 40B are mounted on the second frame 37B.

[0074] Hereinafter, the first frame 37A and the second frame 37B will be collectively referred to as the transplanter frame 37. Additionally, the first seedling supply device 38A and the second seedling supply device 38B will be collectively referred to as the seedling supply device 38. Furthermore, the first planting device 39A and the second planting device 39B will be collectively referred to as the planting device 39. The first soil covering device 40A and the second soil covering device 40B will be collectively referred to as the soil covering device 40.

[0075] Seedling supply device 38 supplies seedlings N (refer to planting device 39) Figure 19 (Soil clod seedlings, etc.) The planting device 39 is a device for planting seedlings N supplied by the seedling supply device 38 into the field. It has a planting tool 64, which uses the power of the prime mover E1 to lift and lower the seedling N and push it into the field to plant the seedling N. The soil covering device 40 is a device for collecting and covering the root part of the planted seedling N with soil and compacting the soil around the root part of the seedling N.

[0076] like Figure 3 , Figure 4As shown, the seedling supply device 38 has multiple seedling supply cups 171 and 172 for feeding seedlings. The multiple seedling supply cups include multiple first supply cups 171 and multiple second supply cups 172. In this embodiment, there are 11 first supply cups 171 and 11 second supply cups 172, for a total of 22 supply cups. The first supply cups 171 and second supply cups 172 are alternately arranged along a circular conveying path R1 extending in the front-rear direction K1.

[0077] like Figure 4 As shown, the plurality of first planting devices 39A include a first planting device 39AL on the left and a first planting device 39AR on the right. The plurality of first covering devices 40A include a first covering device 40AL on the left corresponding to the first planting device 39AL and a first covering device 40AR on the right corresponding to the first planting device 39AR. Additionally, the plurality of second planting devices 39B include a second planting device 39BL on the left and a second planting device 39BR on the right. The plurality of second covering devices 40B include a second covering device 40BL on the left corresponding to the second planting device 39BL and a second covering device 40BR on the right corresponding to the second planting device 39BR.

[0078] The first planting device 39A plants two rows of seedlings on one ridge, and the second planting device 39B also plants two rows of seedlings on one ridge.

[0079] Furthermore, there can be three or more transplanting units. While multiple transplanting units are preferred, one is also acceptable. That is, the transplanting machine 3 only needs to have at least one transplanting unit. Therefore, the transplanting machine 3 only needs to have at least one seedling supply device. Additionally, the planting device only needs to be provided for each transplanting unit. That is, the transplanting machine 3 only needs to have at least one planting device (planting tool).

[0080] like Figure 2 As shown, the transplantation machine 3 includes a chair 187 for the operator to sit on when performing transplantation unit 36. The chair 187 is located in front of and behind the transplantation unit 36. That is, the chair 187 includes front chairs 187A and 187B and rear chairs 187C and 187D.

[0081] like Figure 3 As shown, the front seats 187A and 187B are mounted on the frame 37 of the transplanter. The front seats 187A and 187B are positioned between the rotary tiller 2 and the transplanter 3.

[0082] like Figure 2As shown, the rear chairs 187C and 187D are supported by the rear chair mounting body 199. The rear chair mounting body 199 is mounted on the rotating frame 11 and can move freely up and down via the frame connecting mechanism 200. The frame connecting mechanism 200 is composed of a parallel linkage mechanism, allowing the rear chairs 187C and 187D to rise and fall parallel to the ground.

[0083] The rear chair mount 199 contacts the field via wheels 206 and moves up and down relative to the rotary tiller 2 and transplanter 3, following the contours of the field.

[0084] like Figure 3 As shown, a seedling supply station 188A is located behind the first front chair 187A. A seedling supply station 188B is located behind the second front chair 187B. Additionally, a seedling supply station 188C is located in front of the first rear chair 187C. A seedling supply station 188D is located in front of the second rear chair 187D. The seedling supply station 188A is located on the front side of the worker seated in the first front chair 187A. The seedling supply station 188B is located on the front side of the worker seated in the second front chair 187B. The seedling supply station 188C is located on the front side of the worker seated in the first rear chair 187C. The seedling supply station 188D is located on the front side of the worker seated in the second rear chair 187D.

[0085] Multiple seedlings (N) can be placed on seedling supply platforms 188A-188D (see reference). Figure 19 Seedling tray 189 (reference) Figure 8 The operator can supply seedlings N from seedling trays 189 placed on seedling supply tables 188A-188D to seedling supply cups 171 and 172 of seedling supply device 38.

[0086] like Figure 3 As shown, the rotary tiller 1 includes pre-planting platforms 280L and 280R for carrying containers (not shown), which in turn hold seedling trays 189. The pre-planting platforms 280L and 280R are positioned above the rotary tiller 2. The pre-planting platform 280L is located above the left side of the rotary tiller 2 and in front of the first front seat 187A. The pre-planting platform 280R is located above the right side of the rotary tiller 2 and in front of the second front seat 187B.

[0087] Figure 4 This is a structural diagram showing the power transmission system of the work machine 1. (Cross) Figure 5 and Figure 6 Please provide an explanation.

[0088] exist Figure 4 In this process, the power from the prime mover E1 of the tractor 1A is received by the input shaft 21 of the transmission box 12 of the rotary tiller 2 via the PTO shaft 22 of the power transmission box T1.

[0089] A first gear (bevel gear) G1 is provided at the rear of the input shaft 21. The first gear G1 meshes with a second gear (bevel gear) G2. The second gear G2 is mounted on a first transmission shaft S1 with a shaft having a width direction K2. A third gear (spur gear) G3 is provided on the first transmission shaft S1. The third gear G3 meshes with a fourth gear (spur gear) G4 located below it. The fourth gear G4 meshes with a fifth gear (spur gear) G5 located below it. The fifth gear G5 is mounted on the rotating shaft 16.

[0090] Therefore, the power transmitted to the input shaft 21 is transmitted to the rotating shaft 16 via the first to fifth gears G1 to G5. The rotating shaft 16 rotates, and the plow claws protruding from the rotating shaft 16 rotate, driving the tillage section 18 of the cultivated field.

[0091] A first drive shaft S1 extends from approximately the center of the rotary tiller 2 in the width direction toward the outer side (left side) of the machine width. A first sprocket SP1 is provided at one end (left end) of the first drive shaft S1 on the outer side of the machine width. A second drive shaft S2 extending in the width direction is provided in front of the first drive shaft S1. A second sprocket SP2 is provided on the second drive shaft S2. A chain 26 is mounted on the first sprocket SP1 and the second sprocket SP2. Therefore, the power transmitted to the first drive shaft S1 is transmitted to the second drive shaft S2.

[0092] A sixth gear G6 is provided at one end (left end) of the second drive shaft S2. The sixth gear G6 rotates integrally with the second drive shaft S2. The sixth gear G6 is a pulse detection gear used to measure the rotational speed of the second drive shaft S2. By measuring the rotational speed of the second drive shaft S2, the rotational speed of the prime mover E1 can be calculated.

[0093] A pulse sensor 25 is provided near the sixth gear G6. This pulse sensor 25 outputs a pulse-like signal (generates a pulse) by detecting the undulation of the sixth gear G6. The pulse sensor 25 is, for example, a magnetoresistive rotary sensor. The pulse sensor 25 is connected to a control device (not shown), and the generated pulse is input to the control device. The control device measures the rotational speed of the second drive shaft S2 based on the signal from the pulse sensor 25 (performing signal processing). By measuring the rotational speed of the second drive shaft S2, the rotational speed of the prime mover E1 can be calculated, and the movement of the working machine 1 can be calculated based on the rotational speed of the prime mover E1. In addition, the position (upper limit position) of the planting tool 64 can also be detected. The control device is constructed using a microcomputer equipped with a CPU, EEPROM, etc. The control device is connected to the battery of the tractor 1A, for example, and is powered by the battery.

[0094] An electromagnetic clutch 24 is provided at one end (left end) of the second drive shaft S2. The electromagnetic clutch 24 can intermittently transmit the power from the second drive shaft S2 to the third drive shaft S3. The power transmitted to the third drive shaft S3 is then... Figure 4 The power transmission system shown is transmitted to Figure 5 and Figure 6 The transplanting machine 3 shown drives the transplanting machine 3 (specifically, drives the planting tool 64 and seedling supply devices 38A, 38B, which are equipped on the transplanting machine 3 and will be described later).

[0095] The electromagnetic clutch 24 is connected to and controlled by the aforementioned control device. After being disengaged by a clutch disengagement signal from the control device, the electromagnetic clutch 24 is engaged by a clutch engagement signal from the control device. That is, the electromagnetic clutch 24 is disengaged for the specified amount of time according to the command signal from the control device. Alternatively, there is a case where the transplanting machine 3 can be continuously driven without disengaging the electromagnetic clutch 24 (without stopping the drive of the planting tool 64 and the seedling supply devices 38A and 38B).

[0096] Next, the power transmission system from the third drive shaft S3 to the transplanting machine 3 will be explained.

[0097] A worm gear 30 is mounted on the third drive shaft S3, and the worm gear 30 meshes with a worm wheel 31. The worm wheel 31 is mounted on the fourth drive shaft S4. The fourth drive shaft S4 is connected to the output shaft 32 via a brake 27. The power transmitted to the third drive shaft S3 is transmitted to the output shaft 32 via the worm gear 30, the worm wheel 31, the fourth drive shaft S4, and the brake 27. Therefore, the power from the prime mover E1 is transmitted from the output shaft 32 to the transplanting machine 3 via the worm gear 30, etc.

[0098] By transmitting power from the prime mover E1 to the transplanting machine 3 via the worm gear 30, the self-locking function of the worm gear (preventing the worm from rotating from the worm wheel) can prevent the planting tool 64 from suddenly turning (reversing) at the stop position (top dead center). Furthermore, the brake 27, through the action of the spring, prevents the planting tool 64 from reversing (descending) due to inertia and not fully moving to the top dead center, even if the electromagnetic clutch 24 is disengaged at the top dead center.

[0099] The brake 27, the sixth gear (pulse detection gear) G6, the pulse sensor 25, and the electromagnetic clutch 24 are located on one end (left end) of the rotary tiller 2 in the width direction (machine width direction K2). Therefore, the operator can easily approach and adjust the brake 27, the sixth gear (pulse detection gear) G6, the pulse sensor 25, and the electromagnetic clutch 24 from the side of the rotary tiller 2.

[0100] The output shaft 32 is composed of a propeller shaft. The output shaft 32 extends rearward from the upper left of the rotary tiller 2. At the mid-forward section of the output shaft 32, a power branch mechanism 35, consisting of a chain drive mechanism, is provided. A portion of the rotational power of the output shaft 32 is branched by the power branch mechanism 35 and transmitted to the irrigation pump 50 via a gear mechanism 49, driving the irrigation pump 50. The irrigation pump 50 is mounted on the upper left of the rotary tiller 2 and supplies water from a water tank mounted on the traveling body 1A to an irrigation pipe (not shown) located near the planting tool.

[0101] A seventh gear (bevel gear) G7 is provided at the rear end of the output shaft 32, which transmits power from the prime mover E1. The seventh gear G7 meshes with the eighth gear (bevel gear) G8. The eighth gear G8 is located at one end (left end) of the main shaft 107. Thus, power from the prime mover E1 is transmitted from the output shaft 32 to the main shaft 107.

[0102] A first torque limiter 108 and a second torque limiter 109 are provided on the spindle 107. When an overload is applied to the first transplant unit 36A, the first torque limiter 108 cuts off the power transmission (torque transmission) from the spindle 107 to the first transplant unit 36A. When an overload is applied to the second transplant unit 36B, the second torque limiter 109 cuts off the power transmission (torque transmission) from the spindle 107 to the second transplant unit 36B.

[0103] like Figure 4 As shown, the power transmission mechanism includes the first transmission mechanism 115a to the 12th transmission mechanism 115m.

[0104] The power transmitted to the main shaft 107 is transmitted to the first shaft 111 via the first transmission mechanism (chain flexible transmission mechanism) 115a. In addition, the power transmitted to the main shaft 107 is transmitted to the second shaft 112 via the second transmission mechanism (chain flexible transmission mechanism) 115b.

[0105] The power transmitted to the first shaft 111 is transmitted to the first seedling supply device 38A via the third transmission mechanism (bevel gear transmission mechanism) 115c and the fourth transmission mechanism (chain flexible transmission mechanism) 115d. The power transmitted to the second shaft 112 is transmitted to the second seedling supply device 38B via the fifth transmission mechanism (bevel gear transmission mechanism) 115e and the sixth transmission mechanism (chain flexible transmission mechanism) 115f.

[0106] On the seedling supply device 38, a first rotating body 178 at the front and a second rotating body 179 at the rear are rotatably arranged about a longitudinal axis. A cable 180 is wound between the first rotating body 178 and the second rotating body 179. The first rotating body 178 and the second rotating body 179 are composed of sprockets, and the cable 180 is composed of a chain.

[0107] A first supply cup 171 and a second supply cup 172 are arranged along the outer periphery of the cable body 180.

[0108] The first rotating body 178 rotates by transmitting power via the third transmission mechanism 115c and the fourth transmission mechanism 115d. As a result, the cable body 180, the first supply cup 171, and the second supply cup 172 move in the direction of arrow Y1. The cable body 180 forms the transmission path R1 for the first supply cup 171 and the second supply cup 172. Furthermore, as... Figure 4 As shown, power is transmitted to the first rotating body 178 of the second seed supply device 38B via the fifth transmission mechanism 115e and the sixth transmission mechanism 115f.

[0109] Additionally, the power transmitted to the first shaft 111 is transmitted to the first planting device 39AR on the right side via the seventh transmission mechanism (chain flexible transmission mechanism) 115g, and to the first planting device 39AL on the left side via the eighth transmission mechanism 115h, the third shaft 113, and the ninth transmission mechanism 115i. The power transmitted to the second shaft 112 is transmitted to the second planting device 39BR on the right side via the tenth transmission mechanism (chain flexible transmission mechanism) 115j, and to the second planting device 39BL on the left side via the eleventh transmission mechanism 115k, the fourth shaft 114, and the twelfth transmission mechanism 115m.

[0110] Below, refer to Figure 4 , Figure 5 and Figure 6 Explain the power transmission mechanism of the planting device 39.

[0111] The first planting device 39A and the second planting device 39B are constructed in the same manner, therefore... Figure 5 , Figure 6 The structure of the first planting device 39A shown will be described, while the description of the structure of the second planting device 39B will be omitted. Furthermore, the first planting device 39AL on the left and the first planting device 39AR on the right are configured similarly except for their left-right symmetry; therefore, the general descriptions will be omitted.

[0112] like Figure 5 , Figure 6 As shown, the first planting device 39AL and the first planting device 39AR are arranged in the width direction K2 and are positioned at different locations in the front-rear direction K1. The first planting device 39AL is mounted on the first planting frame 78L, and the first planting device 39AR is mounted on the second planting frame 78R.

[0113] The first planting device 39AL has a planting tool 64 and a planting lifting mechanism 139. The first planting device 39AR also has a planting tool 64 and a planting lifting mechanism 139, just like the first planting device 39AL.

[0114] Hereinafter, the planting tool 64 of the first planting device 39AL is sometimes referred to as planting tool 64AL, and the planting tool 64 of the first planting device 39AR is sometimes referred to as planting tool 64AR. In addition, the planting lifting mechanism 139 of the first planting device 39AL is sometimes referred to as planting lifting mechanism 139AL, and the planting lifting mechanism 139 of the first planting device 39AR is sometimes referred to as planting lifting mechanism 139AR.

[0115] Planting tool 64 is a component used to plant seedlings in the field (ridge). Planting tool 64 is beak-shaped with the front end pointing downwards (see reference). Figure 5 The planting tool 64 has a front component 140 and a rear component 141. The planting tool 64 can be opened and closed freely by the front component 140 and the rear component 141 moving away from and towards each other in the front-rear direction K1. In addition, the front component 140 and the rear component 141 are subjected to force in the closing direction by a tension spring.

[0116] like Figure 5 As shown, the seventh transmission mechanism 115g has a drive sprocket 116R that rotates integrally with the first shaft 111, a driven sprocket 117R supported on the second planting frame 78R via a support shaft 118R, and a chain 119R wound across the drive sprocket 116R and the driven sprocket 117R. Power is transmitted from the first shaft 111 to the support shaft 118R through this seventh transmission mechanism 115g, causing the support shaft 118R to rotate.

[0117] like Figure 4 As shown, the 9th transmission mechanism 115i includes a drive sprocket 116L that rotates integrally with the 3rd shaft 113, a driven sprocket 117L supported on the 1st planting frame 78L via a support shaft 118L, and a chain 119L wound across the drive sprocket 116L and the driven sprocket 117L. Power is transmitted from the 3rd shaft 113 to the support shaft 118L via this 9th transmission mechanism 115i, causing the support shaft 118L to rotate.

[0118] The 10th transmission mechanism 115j is configured in the same way as the 7th transmission mechanism 115g. Power is transmitted from the 2nd shaft 112 to the support shaft 118R of the 2nd planting device 39BR on the right side through the 10th transmission mechanism 115j, and the support shaft 118R of the 2nd planting device 39BR rotates.

[0119] The 12th transmission mechanism 115m is configured in the same way as the 9th transmission mechanism 115i. Power is transmitted from the 4th shaft 114 to the support shaft 118L of the 2nd planting device 39BL on the left through the 12th transmission mechanism 115m, and the support shaft 118L of the 2nd planting device 39BL rotates.

[0120] like Figure 5 , Figure 6 As shown, the planting lifting mechanism 139 is a device that supports the planting tool 64 and raises and lowers the planting tool 64. In detail, the planting lifting mechanism 139AL is a device that raises and lowers the planting tool 64AL, and the planting lifting mechanism 139AR is a device that raises and lowers the planting tool 64AR.

[0121] The planting lifting mechanism 139 has a first housing 120, a second housing 121, and a mounting member 122. The first housing 120 of the planting lifting mechanism 139L is rotatably supported on a first planting frame 78L via a support shaft 118L. The first housing 120 of the planting lifting mechanism 139R is rotatably supported on a second planting frame 78R via a support shaft 118R. The second housing 121 is rotatably supported on the floating end side of the first housing 120. The mounting member 122 is supported by the second housing 121. The planting tool 64 is supported on the mounting member 122.

[0122] As the support shafts 118L and 118R rotate, the first box 120 and the second box 121 rotate. A power transmission device is provided within the first box 120 and the second box 121 so that if the first box 120 rotates in one direction about the horizontal axis, the second box 121 rotates in conjunction with the first box 120 in the opposite direction (about the other direction about the horizontal axis).

[0123] As the first box 120 and the second box 121 rotate, the mounting component 122 moves back and forth while moving up and down in parallel, and the planting tool 64 moves up and down (lifts and lowers) in a long elliptical trajectory in the vertical direction.

[0124] At the rising position (top dead center), the seedling is lowered and supplied to the planting tool 64. At this time, the planting tool 64 is in the closed state, and the seedling is contained and held inside the planting tool 64. Then, the planting tool 64, holding the seedling, descends and plunges into the field. Alternatively, the planting tool 64 opens as it plunges into the field, forming a planting hole, and the seedling is lowered and released while the tool is open. Thus, the seedling is planted in the field.

[0125] In the planting device 39 configured above, if the support shafts 118L and 118R rotate one revolution, the planting tool 64 will move up and down once.

[0126] The first planting device 39AL and the first planting device 39AR are arranged in the machine width direction K2 and are positioned at different locations in the front-rear direction K1. Thus, two rows of seedlings are planted in an alternating pattern on the ridge through a single transplanting unit (so that one side of the seedlings adjacent in the machine width direction K2 is planted in a staggered position relative to the front-rear side of the other direction).

[0127] In this embodiment, the left and right planting tools 64 rise and fall simultaneously. Furthermore, when the planting tools 64 stop, both the left and right planting tools 64 stop at the top dead center position.

[0128] like Figure 4 As shown, the transplanting machine 3 has multiple auxiliary devices 123. These auxiliary devices 123 include a first auxiliary device 123A located in the first transplanting unit 36A and a second auxiliary device 123B located in the second transplanting unit 36B. Each auxiliary device 123 assists in the lifting and lowering of the planting tool 64. Each auxiliary device 123 has an auxiliary spring that applies force in the direction that raises the planting tool 64. By having the auxiliary device 123, even if the electromagnetic clutch 24 is disengaged just before the top dead center, it is possible to prevent the planting tool 64 from inverting due to inertia and not fully moving to the top dead center.

[0129] like Figure 2 , Figure 3 and Figures 7-11 As shown, the transplanting machine 3 of one embodiment of the present invention has a structure for rapidly supplying seedling trays 189 to the seedling platform 190, and the structure will be described below.

[0130] The transplanting machine 3 includes a planting device 39 for planting seedlings into the field, a seedling supply device 38 for supplying seedlings to the planting device 39, and a seedling platform 190 for holding a seedling tray 189, which contains seedlings N supplied to the seedling supply device 38 (see reference). Figure 19 The seedling tray 189 has a plurality of receiving recesses 189a arranged in a longitudinal and transverse direction on its upper surface, capable of individually accommodating seedlings N. Its lower surface has grooves 189b formed between adjacent receiving recesses 189a and extending in a parallel direction. The seedling platform 190 has a mounting portion 190a for mounting the seedling tray 189 and a guide portion 190b for guiding the movement of the seedling tray 189 on the mounting portion 190a. The guide portion 190b protrudes upwards compared to the mounting portion 190a, and when the seedling tray 189 is placed on the mounting portion 190a, it enters the groove 189b and extends along the groove 189b.

[0131] The following is a detailed explanation.

[0132] like Figure 2 , Figure 3As shown, the seedling platform 190 is positioned between the front chairs 187A and 187B and the rear chairs 187C and 187D. The seedling platform 190 is positioned above the first transplant unit 36A and the second transplant unit 36B. The seedling platform 190 is positioned along the entire length of the transplant machine 3 in the width direction K2.

[0133] Figure 7 This is a perspective view of the seedling carrier platform 190. The seedling carrier platform 190 is installed on the frame 132 (see reference). Figure 2 The platform 132 is mounted on the connecting frame 130 (see reference). Figure 3 Above, the connecting frame 130 connects the first transplant unit 36A and the second transplant unit 36B.

[0134] A pair of longitudinal frames 132a are erected on the upper part of the frame 132, and horizontal frames 132b and 132b are erected on the upper end and middle part of the longitudinal frames 132a. A seedling platform 190 is installed across three layers on the frame 132 and on the horizontal frames 132b of each layer.

[0135] The seedling tray 190 has a frame 190c that is quadrilateral when viewed from above. The frame 190c is composed of a front frame member, a rear frame member, a left frame member, and a right frame member. The front and rear frame members of the frame 190c are fixed to the upper part of the platform 132 or the horizontal frame 132b. A reinforcing frame 132c is fixed to the frame 190c. The reinforcing frame 132c is fixed to the left and right frame members of the frame 190c, respectively. The lower part of the reinforcing frame 132c is fixed to the transplanter frame 37 (see reference). Figure 2 ).

[0136] The lower parts of the front and rear frame members of frame 190c are connected by multiple front-rear connecting structural members 190d. The front-rear connecting structural members 190d are rod-shaped members. The lower parts of the left and right frame members of frame 190c are connected at their center in the front-rear direction by left-right connecting structural members 190e. The left-right connecting structural members 190e are flat plate-shaped members.

[0137] Figure 8 This is a three-dimensional view of the seedling tray 189 placed on the seedling platform 190.

[0138] Seedling tray 189 has rows and columns arranged on its upper surface to individually accommodate seedlings N (see reference). Figure 19 Multiple receiving recesses 189a, and a groove 189b on the lower surface (see reference). Figure 9 , Figure 10 The groove 189b is formed between adjacent receiving recesses 189a and extends in parallel directions (longitudinal and transverse). Additionally, Figure 8The seedling tray 189 shown has 32 receiving recesses 189a, but the number of receiving recesses 189a is not particularly limited and can be more or less than 32.

[0139] like Figure 7 , Figures 9-11 As shown, the seedling platform 190 has a placement part 190a for placing a seedling tray 189 and a guide part 190b for guiding the movement of the seedling tray 189 on the placement part 190a.

[0140] The mounting section 190a is composed of front and rear connecting structural members 190d and left and right connecting structural members 190e.

[0141] The guide portion 190b is provided to protrude upward compared to the placement portion 190a, and enters the groove portion 189b and extends along the groove portion 189b when the seedling tray 189 is placed on the placement portion 190a.

[0142] The guide section 190b extends along a width direction (machine width direction K2) orthogonal to the front-back direction of the transplanting machine 3. The guide section 190b guides the movement of the seedling tray 189 on the mounting section 190a in the width direction.

[0143] The guide section 190b extends along the width direction (machine width direction K2) of the seedling platform 190. In detail, the guide section 190b extends from one end (left end) of the seedling platform 190 along the width direction (machine width direction K2) to the other end (right end).

[0144] The guide portion 190b connects the two opposing sides (the left and right frame members) of the frame 190c. The guide portion 190b is composed of a plate-like member, and is configured such that the thickness direction of the plate member faces the front-rear direction. Therefore, the width of the guide portion 190b in the front-rear direction is smaller than its height. The height of the upper edge of the guide portion 190b is set below the height of the upper edge of the frame 190c.

[0145] like Figure 11 As shown, the seedling platform 190 is formed such that the width direction K2 is longer than the front-to-back direction K1.

[0146] like Figures 9-11 As shown, seedling tray 189 is placed on seedling platform 190. Figure 11 As shown, the seedling tray 189 can be slidably placed on the seedling platform 190 from the side (outer side of the body) in the direction of the arrow (inner side of the body).

[0147] The seedling platform 190 is capable of holding multiple (at least two) seedling trays 189. The multiple seedling trays 189 are separately placed on the left and right sides of the seedling platform 190. In this embodiment, the seedling platform 190 is sized to hold a total of eight seedling trays 189. Specifically, the seedling platform 190 is sized to hold two seedling trays 189 arranged in the front-to-back direction and four seedling trays 189 arranged in the left-to-right direction (machine width direction). However, the size of the seedling platform 190 is not limited to this. The seedling trays 189 can be sized to hold fewer than eight (e.g., four, two, etc.) or to hold nine or more (e.g., ten, twelve, etc.).

[0148] In this embodiment, guide portions 190b are provided at two intervals in the front-to-back direction. The front guide portion 190b is provided on the front side of the left-to-right connecting member 190e. The rear guide portion 190b is provided on the rear side of the left-to-right connecting member 190e. The front-to-back connecting member 190d connects the guide portions 190b to the left-to-right connecting member 190e. The number of guide portions 190b is not particularly limited; it can be one, but it is preferably multiple (two or more). By providing multiple guide portions 190b, multiple seedling trays 189 can be guided.

[0149] like Figure 2 , Figure 3 As shown, the transplanting machine 3 is equipped with a chair 187 for the operator to sit on when supplying seedlings to the seedling supply device 38. The chair 187 includes front chairs 187A and 187B located in front of the seedling supply device 38 and rear chairs 187C and 187D located behind the seedling supply device 38.

[0150] The seedling platform 190 is located above the seedling supply device 38 and between the front seats 187A and 187B and the rear seats 187C and 187D. The seedling platform 190 is configured such that the guide section 190b extends along the width of the machine.

[0151] The seedling platform 190 includes a plurality of seedling platforms 190 arranged in a vertical direction. As described above, in this embodiment, the seedling platform 190 includes three seedling platforms 190.

[0152] like Figure 2 , Figure 3 As shown, a footboard S is provided on the outer side of the seedling platform 190 in the width direction (outer side of the machine width), at a position higher than the ground. This footboard S allows the operator to climb onto the seedling tray 189 when it is placed on the seedling platform 190. Figure 2 As shown, in the machine width direction K2, the pedal S is located at a position overlapping with the end of the outer side of the seedling platform 190. Additionally, in the front-rear direction K1, the pedal S is located at a position overlapping with the front chairs 187A and 187B.

[0153] like Figure 3 As shown, the seedling platform 190 is arranged across the top of the first seedling supply device 38A and the second seedling supply device 38B. However, the seedling platform 190 does not cover the seedling supply cups 171, 172 located in front of the operators sitting in each chair 187.

[0154] The operator can supply seedlings N from the seedling tray 189 on the seedling platform 190 to the seedling supply cups 171 and 172. Since the seedling platform 190 is positioned across the top of the first seedling supply device 38A and the second seedling supply device 38B, the operator seated in each of the first front chair 187A, second front chair 187B, first rear chair 187C, and second rear chair 187D can retrieve seedlings N from the seedling tray 189 on the seedling platform 190. That is, the seedling platform 190 is positioned so that the operator seated in each chair 187 can retrieve seedlings N from the seedling tray 189 on the seedling platform 190.

[0155] If the seedlings in the seedling tray 189 on the seedling supply table 188 are exhausted, the operator can supply the seedlings N from the seedling tray 189 on the seedling carrying table 190 to the seedling supply cups 171 and 172. That is, the seedling carrying table 190 is a table for holding the prepared seedling trays 189. In addition, if the seedlings N in the seedling tray 189 on the seedling supply table 188 are exhausted, an empty seedling tray 189 can be exchanged with the seedling tray 189 on the seedling carrying table 190. Alternatively, the seedling supply table 188 located in front of each operator may not be provided, and the seedling carrying table 190 may be used as a common seedling supply table for all operators.

[0156] If the seedling tray 189 on the seedling platform 190 becomes empty, a new seedling tray 189 containing seedlings must be supplied to the seedling platform 190.

[0157] While the transplanter 3 is moving and transplanting is being carried out, a seedling transport vehicle carrying new seedling trays containing seedlings travels alongside the transplanter 3. Previously, if there were no more seedlings on the seedling platform 190, the tractor would be temporarily stopped and the seedling trays loaded on the seedling transport vehicle would be transferred to the seedling platform 190 of the transplanter 3.

[0158] However, in this embodiment described above, the seedling tray 189 can be slidably loaded onto the seedling platform 190 from the side of the moving transplanter 3 without stopping the tractor. Specifically, if the groove 189b of the seedling tray 189 is placed into the guide portion 190b of the seedling platform 190 (see reference...) Figure 10 ), and place seedling tray 189 along the line Figure 11 Inserting the seedling tray 189 in the direction indicated by the arrow will allow it to be placed on the seedling platform 190.

[0159] like Figure 11 As shown, by sliding the initial seedling tray 189, the next seedling tray 189 pushes the initial seedling tray 189, causing the initial seedling tray 189 to move. This process continues until all four seedling trays 189 are pushed in, at which point the initial seedling tray 189 stops upon contact with the frame 190c. In this transfer operation, the operator places their foot on the footplate S (see reference...). Figure 2 , Figure 3 On the other hand, it is easier to load the seedling tray 189 onto the seedling platform 190 located at a higher position.

[0160] In this invention, the seedling platform 190 is not limited to the structure shown in the above embodiments. For example, the placement part 190a may also be composed of a single plate member, on which a guide part 190b is mounted. Furthermore, the guide part 190b is not limited to being provided along the entire length of the machine width direction K2, but may be provided only for a portion of the machine width direction K2. However, the guide part 190b is preferably provided at least on one end and the other end of the machine width direction K2. Additionally, in the above embodiments, the guide part 190b is not limited to being provided one per seedling tray 189, but may be provided multiple per seedling tray 189. Furthermore, in the above embodiments, the seedling platform 190 has three layers in the vertical direction, but is not limited to this number of layers. Furthermore, the location where the seedling platform 190 is provided is not limited to the frame 132. Furthermore, it is not limited to being located between the front chair and the rear chair.

[0161] like Figure 3 , Figure 4 and Figures 12-19 As shown, the transplanting machine 3 of one embodiment of the present invention has a structure for preventing the seedlings from swinging when the bottom cover of the seedling supply cups 171 and 172 of the seedling supply device 38 is opened, thereby stabilizing the falling of the seedlings. The structure will be described below.

[0162] The transplanting machine 3 includes a planting device 39 for planting seedlings into the field and a seedling supply device 38 for supplying seedlings N to the planting device 39. The seedling supply device 38 has seedling supply cups 171 and 172 that receive seedlings N and cause them to fall toward the planting device 39. The seedling supply cups 171 and 172 have: a cylindrical cup body 181 with a seedling receiving port 181a at the top and a seedling falling port 181b at the bottom; a bottom cover 183 that can close or open the falling port 181b; a hinge that connects the bottom cover 183 to the cup body 181 in an openable and closable manner; a force-applying member that applies force to the bottom cover 183 in the direction of opening the falling port 181b; and a limiting part P that limits the position of the bottom cover 183 when it is open.

[0163] The following is a detailed explanation.

[0164] Figure 12This is a top view of the seedling supply device 38.

[0165] The seedling supply device 38 is a device that causes seedlings to fall and be supplied to the planting tool 64 located below the planting device 39.

[0166] Figure 3 The first seedling supply device 38A and the second seedling supply device 38B shown have the same structure, therefore, in Figure 12 The diagram illustrates the structure of the first seedling supply device 38A, omitting the description of the second seedling supply device 38B. Additionally, in... Figure 12 In the following figures and their descriptions, the descriptions of the first and second figures and the symbols A and B will be omitted.

[0167] like Figure 3 As shown, the seedling supply device 38 is supported on the transplanter frame 37 (see reference). Figure 3 ).like Figure 12 As shown, the seedling supply device 38 has multiple seedling supply cups 171 and 172 for feeding seedlings N. The multiple supply cups include multiple first supply cups 171 and multiple second supply cups 172. In this embodiment, there are 11 first supply cups 171 and 11 second supply cups 172, for a total of 22 supply cups. The first supply cups 171 and the second supply cups 172 are arranged along an annular conveying path R1 extending in the front-rear direction K1 (see reference). Figure 4 Configuration.

[0168] In detail, the first supply cup 171 and the second supply cup 172 are arranged in a ring in a way that is an elongated ellipse in the front-back direction K1 when viewed from above. In addition, the first supply cup 171 and the second supply cup 172 are arranged alternately along the elliptical conveying path R1.

[0169] The first supply cup 171 and the second supply cup 172 are conveyed by the conveyor mechanism 177 (see reference). Figure 4 ) Follow the teleportation path R1 towards arrow Y1 (refer to) Figure 4 The transmission is intermittent in one direction. The transmission mechanism 177 has a first rotating body 178 (see reference). Figure 4 , Figure 5 The first rotating body 178 and the second rotating body 179 are composed of sprockets, and the cable body 180 is composed of an endless (ring-shaped) chain wound across the first rotating body 178 and the second rotating body 179. The first supply cup 171 and the second supply cup 172 are arranged along the outer periphery of the cable body 180.

[0170] like Figure 4As shown, the first rotating body 178 rotates by transmitting power via the third transmission mechanism 115c and the fourth transmission mechanism 115d. Consequently, the cable body 180, the first supply cup 171, and the second supply cup 172 move in the direction of arrow Y1. Furthermore, as... Figure 4 As shown, power is transmitted to the first rotating body 178 of the second seed supply device 38B via the fifth transmission mechanism 115e and the sixth transmission mechanism 115f.

[0171] like Figure 15 As shown, the first supply cup 171 has the following features: It can contain the seedling N that has been introduced (see reference). Figure 19 The cylindrical cup body 181 and the mounting part 182 installed on the cable body 180 (see reference) Figure 18 ), and a bottom cover 183 that blocks the opening at the lower end of the cup body 181. The cup body 181 has a receiving port 181a for seedling N at the upper part and a dropping port 181b for seedling N at the lower part (see reference). Figure 14 , Figure 18 The second supply cup 172 also has the same structure.

[0172] like Figures 15-17 As shown, the first supply cup 171 has a hinge portion H that connects the bottom cover 183 to the cup body 181 in an openable and closable manner. The hinge portion H is located on the outside of the drop opening 181b. The hinge portion H has a hinge axis H1.

[0173] A shaft support portion H2 supporting the hinge shaft H1 and a reinforcing rib H3 reinforcing the shaft support portion H2 are provided on the outer peripheral surface of the cup body 181. The reinforcing rib H3 includes a first reinforcing rib H3R provided on one end side of the hinge shaft H1 and a second reinforcing rib H3L provided on the other end side of the hinge shaft H1.

[0174] The first supply cup 171 has a force-applying member F that applies force to the bottom cover 183 in the direction of opening the drop opening 181b. The force-applying member F is disposed on the outside of the drop opening 181b. In this embodiment, the force-applying member F is constituted by a helical spring externally embedded in the hinge shaft H1.

[0175] like Figure 15 , Figure 16 As shown, the first supply cup 171 has a limiting part P that restricts the position of the bottom cover 183 when it is open.

[0176] The limiting part P has a raised portion P1 formed on the outer peripheral surface of the cup body 181 and an abutting portion P2 formed on the bottom cover 183. The abutting portion P2 is formed on the bottom cover 183. Figure 19 As shown, the abutting part P2 abuts against the raised part P1 when the bottom cover 183 is opened.

[0177] According to this structure, the force-applying member F applies force to the bottom cover 183 in the direction of opening the drop opening 181b, so that when the bottom cover 183 is opened, the abutting portion P2 abuts against the raised portion P1 formed on the outer peripheral surface of the cup body 181. Thus, the bottom cover 183 is stably held in the open state (the abutting portion P2 abuts against the raised portion P1). Therefore, the bottom cover 183 will not swing (wobble) in the open state, and can be stably maintained in the open state. Therefore, contact with the bottom cover 183 when the seedling N falls is prevented, and the falling of the seedling N can proceed smoothly.

[0178] In addition, such as Figure 19 As shown, because the hinge part H is located on the outside of the drop opening 181b, the drop opening 181b is fully opened. Therefore, it prevents the seedling N from contacting the bottom cover 183 when it falls, allowing the seedling N to fall smoothly.

[0179] like Figures 12-19 As shown, the seedling supply device 38 includes: a conveying mechanism 177 that conveys seedling supply cups 171 and 172 along a conveying path R1 that is circular in plan view; an inner member B1 disposed on the inner side of the conveying path R1; and an outer member B2 disposed on the outer side of the conveying path R1. The seedling supply cups 171 and 172 have guide portions B3 that guide the conveying of the seedling supply cups 171 and 172 along the conveying path R1. The guide portion B3 includes an inner guide portion B3R that abuts against the inner member B1 and an outer guide portion B3L that abuts against the outer member B2.

[0180] In addition, the inner guide portion B3R has a first portion B3R1 that abuts against the lower surface of the inner member B1 and a second portion B3R2 that abuts against the surface of the inner member B1 on the aforementioned conveying path R1 side.

[0181] The following is a detailed explanation.

[0182] In addition, the following explanation distinguishes the bottom cover 183 by designating the bottom cover of the first supply cup 171 as symbol 183a and the bottom cover of the second supply cup 172 as symbol 183b.

[0183] like Figure 13 As shown, the bottom cover 183a of the first supply cup 171 has a first engaging portion 184a. The bottom cover 183b of the second supply cup 172 has a second engaging portion 184b. The first engaging portion 184a protrudes into the inner periphery of the conveying path R1 (cable body 180) of the first supply cup 171. The second engaging portion 184b protrudes into the outer periphery of the conveying path R1 (cable body 180) of the second supply cup 172. Figure 15 The first supply cup 171 is shown. Figure 16 and Figure 17 The second supply cup 172 is shown.

[0184] like Figure 13 As shown, the first supply cup 171 has its bottom cover 183a open on the right side of the conveyor path R1. The first supply cup 171, indicated by symbol OP1, is the first supply cup 171 with its bottom cover 183a open. Furthermore, the position indicated by symbol D1 is the first open position (open position on one side of the machine width direction) of the bottom cover 183a of the first supply cup 171. The second supply cup 172 has its bottom cover 183b open on the left side of the conveyor path R1. The second supply cup 172, indicated by symbol OP2, is the second supply cup 172 with its bottom cover 183b open. Furthermore, the position indicated by symbol D2 is the second open position (open position on the other side of the machine width direction) of the bottom cover 183b of the second supply cup 172. Figure 14 The bottom cover 183b is shown in the second open position (D2).

[0185] The first opening position D1 and the second opening position D2 are seedling dropping positions, which are the positions where seedlings N are dropped and supplied to the planting tool 64. That is, the seedling supply device 38 has a seedling dropping position in the middle of the forward and backward direction of the conveying path R1, which serves as the position for dropping seedlings and supplying them to the planting tool 64.

[0186] like Figure 13 As shown, the first opening position D1 and the second opening position D2 are set at different positions in the front-rear direction K1. In this embodiment, the first opening position D1 is offset forward relative to the second opening position D2. Corresponding to the offset forward position of the first opening position D1 relative to the second opening position D2, the planting device on the left side of each transplanting unit is offset forward relative to the planting device on the right side (see reference). Figure 6 ).

[0187] like Figure 13 As shown, the seedling supply device 38 has a setting member 185 that sets the open positions of the seedling supply cups 171 and 172 (capable of setting the first open position D1 and the second open position D2). The setting member 185 includes a plurality of limiting rods (first limiting rod 186a to sixth limiting rod 186f).

[0188] The first limiting rod 186a abuts against the lower surfaces of the bottom covers 183a and 183b on the front side of the first open position D1 and the second open position D2. Therefore, the first limiting rod 186a restricts the opening of the bottom covers 183a and 183b on the front side of the first open position D1 and the second open position D2. The second limiting rod 186b abuts against the lower surfaces of the bottom covers 183a and 183b on the rear side of the first open position D1 and the second open position D2. Therefore, the second limiting rod 186b restricts the opening of the bottom covers 183a and 183b on the rear side of the first open position D1 and the second open position D2.

[0189] The third limiting rod 186c abuts against the first engaging portion 184a of the bottom cover 183a at the rear side of the first open position D1. Thus, the third limiting rod 186c restricts the opening of the bottom cover 183a at the rear side of the first open position D1. The fourth limiting rod 186d abuts against the second engaging portion 184b of the bottom cover 183b at the front side of the second open position D2. Thus, the fourth limiting rod 186d restricts the opening of the bottom cover 183b at the front side of the second open position D2.

[0190] The fifth limiting rod 186e is located on the right side of the first open position D1 (outer periphery of the conveying path R1 (cable body 180)) and abuts against the second engaging portion 184b of the bottom cover 183b in the first open position D1. This restricts the opening of the bottom cover 183b in the first open position D1. However, it allows the opening of the bottom cover 183a in the first open position D1. The sixth limiting rod 186f is located on the right side of the second open position D2 (inner periphery of the conveying path R1 (cable body 180)) and abuts against the first engaging portion 184a of the bottom cover 183a in the second open position D2. This restricts the opening of the bottom cover 183a in the second open position D2. However, it allows the opening of the bottom cover 183b in the second open position D2 (see reference). Figure 14 ).

[0191] like Figure 19 As shown, planting device 39 (refer to) Figure 5 , Figure 6 The planting tool 64 is located below the open position D. If the bottom cover 183 is opened and the seedling N falls down, the seedling N is supplied to the planting tool 64.

[0192] like Figure 4 As shown, the seedling supply device 38 has a conveying mechanism 177. The conveying mechanism 177 has an idler sprocket 256 (see reference) disposed on the frame 37 of the transplanting machine. Figure 14 , Figure 18 The idler sprocket 256 supports the cable body 180. The conveying mechanism 177 conveys the seedling supply cups 171 and 172 along the conveying path R1, which is circular in plan view (see reference). Figure 4 , Figure 12 , Figure 14 ).

[0193] like Figure 12 As shown, the seedling supply device 38 has an inner member B1 disposed along the inner side of the conveying path R1, and an outer member B2 disposed along the outer side of the conveying path R1. Figure 18As shown, inner component B1 and outer component B2 are mounted on the frame 37 of the transplant machine. Seedling supply cups 171 and 172 are disposed between inner component B1 and outer component B2.

[0194] The outer edge of the inner member B1 has a vertical guide surface B1a and a horizontal guide surface B1b. The vertical guide surface B1a and the horizontal guide surface B1b are located inside the seedling supply cups 171 and 172. The inner edge of the outer member B2 has a guide surface B2a. The guide surface B2a is located outside the seedling supply cups 171 and 172. These guide surfaces B1a, B1b, and B2a are arranged along the conveying path R1.

[0195] like Figures 15-18 As shown, the seedling supply cups 171 and 172 have a guide portion B3, which guides the seedling supply cups 171 and 172 along the conveying path R1. The guide portion B3 has an inner guide portion B3R that abuts against the inner member B1 and an outer guide portion B3L that abuts against the outer member B2.

[0196] like Figures 15-18 As shown, the inner guide portion B3R has a first portion B3R1 that abuts against the lower surface of the horizontal guide surface B1b of the inner member B1, and a second portion B3R2 that abuts against the vertical guide surface B1a of the inner member B1. A mounting portion 182 is provided in the inner guide portion B3R, on which a link of the cable body 180 is mounted.

[0197] According to the above structure, when the seedling supply cups 171 and 172 are conveyed along the conveying path R1, the inner guide part B3R abuts against the inner member B1, and the outer guide part B3L abuts against the outer member B2, which can prevent the seedling supply cups 171 and 172 from tilting or collapsing during the conveying process. Therefore, the seedling supply cups 171 and 172 can be transported stably along the conveying path R1.

[0198] In this invention, the limiting part P is not limited to being composed of the raised part P1 and the abutting part P2 as described above; it can be any component that limits the position of the bottom cover 183 when it is opened.

[0199] The transplantation machine 3 of this embodiment achieves the effects described below.

[0200] The transplanting machine 3 includes: a planting device 39 for planting seedlings N into a field; a seedling supply device 38 for supplying seedlings N to the planting device 39; and a seedling platform 190 for holding seedling trays 189, which contain the seedlings N supplied to the seedling supply device 38; the seedling trays 189 have a plurality of receiving recesses 189a arranged in a horizontal and vertical direction on their upper surface, each capable of individually holding a seedling, and a groove 189b formed between adjacent receiving recesses 189a and extending along the aforementioned parallel direction on their lower surface; the seedling platform 190 has a holding portion 190a for holding the seedling trays 189 and a guide portion 190b for guiding the movement of the seedling trays 189 on the holding portion 190a; the guide portion 190b is provided to protrude upwards compared to the holding portion 190a, and enters the groove 189b and extends along the groove 189b when the seedling trays 189 are placed on the holding portion 190a.

[0201] According to this structure, since the seedling tray 189 can slide along the guide portion 190b, the seedling tray 189 can be quickly supplied to the seedling platform 190.

[0202] In addition, the guide section 190b extends in the width direction orthogonal to the front-back direction of the transplanter 3, guiding the movement of the seedling tray 189 on the placement section 190a in the width direction.

[0203] According to this structure, the seedling tray 189 can be supplied to the loading section 190a from the side of the transplanting machine 3, so that the seedling tray 189 can be loaded onto the seedling loading platform 190 from the seedling transport vehicle or the like that traveling with the transplanting machine 3 without stopping the transplanting operation.

[0204] In addition, the guide portion 190b extends from one end of the seedling platform 190 in the width direction to the other end.

[0205] According to this structure, the seedling tray 189 can be reliably slid and placed from one end of the seedling platform 190 in the width direction to the other end.

[0206] In addition, the seedling platform 190 has a frame 190c that is quadrilateral when viewed from above, and a guide part 190b connects the two opposite sides of the frame 190c.

[0207] According to this structure, since the seedling tray 189 can slide along the guide portion 190b while surrounded by the frame 190c, it is possible to prevent the seedling tray 189 from falling off the seedling platform 190 during sliding. In addition, the frame 190c can be reinforced by the guide portion 190b.

[0208] Additionally, the device includes a chair 187 for an operator to sit on when supplying seedlings N to the seedling supply device 38. The chair 187 includes front chairs 187A and 187B positioned in front of the seedling supply device 38 and rear chairs 187C and 187D positioned behind the seedling supply device 38. The seedling platform 190 is positioned above the seedling supply device 38 and between the front chairs 187A and 187B and the rear chairs 187C and 187D, and the guide portion 190b extends in the width direction.

[0209] According to this structure, the operator sitting in chair 187 can easily remove the seedling N from the seedling tray 189 supplied to the seedling platform 190. In addition, the operator sitting in chair 187 can easily slide the seedling tray 189 along the guide 190b.

[0210] In addition, the seedling platform 190 includes a plurality of seedling platforms 190 arranged in the vertical direction, and a footboard S is provided on the outer side of the seedling platform 190 in the width direction and at a position higher than the ground. The footboard S can be used by the operator to climb on when the seedling tray 189 is placed on the seedling platform 190.

[0211] According to this structure, by having an operator climb onto the footplate S, the seedling tray 189 can be easily and reliably supplied to the seedling platform 190, which is located at a higher position. Thus, even if the seedling platform 190 is configured as a multi-layered structure, the seedling tray 189 can be easily supplied to the upper seedling platform 190, thereby increasing the number of seedling trays 189 that can be placed on the seedling platform 190.

[0212] The transplanting machine 3 includes: a planting device 39 for planting seedlings N into the field; and a seedling supply device 38 for supplying seedlings N to the planting device 39. The seedling supply device 38 has seedling supply cups 171 and 172 that receive seedlings N and cause them to fall toward the planting device 39. The seedling supply cups 171 and 172 have: a cylindrical cup body 181 with a seedling receiving port 181a at the top and a seedling falling port 181b at the bottom; a bottom cover 183 that can close or open the falling port 181b; a hinge part H that can open and close the bottom cover 183 to the cup body 181; a force-applying member F that applies force to the bottom cover 183 in the direction of opening the falling port 181b; and a limiting part P that limits the position of the bottom cover 183 when it is open.

[0213] According to this structure, when the bottom cover 183 is opened, the opening position of the bottom cover 183 is determined by the force-applying member F and the limiting part P. This prevents the seedling N from contacting the bottom cover 183 when it falls, thus ensuring a stable fall of the seedling N.

[0214] In addition, the limiting part P has a raised part P1 formed on the outer peripheral surface of the cup body 181, and an abutting part P2 formed on the bottom cover 183 and abutting against the raised part P1 when the bottom cover 183 is opened.

[0215] According to this structure, the open position of the bottom cover 183 can be reliably determined by the contact portion P2 of the bottom cover 183 abutting against the raised portion P1 formed on the outer peripheral surface of the cup body 181.

[0216] In addition, the force-applying component F is positioned on the outside of the drop opening 181b.

[0217] According to this structure, the soil of the seedling N falling from the drop outlet 181b will not adhere to the force-applying component F, and the force-applying component F can also be prevented from rusting.

[0218] In addition, the hinge part H is located on the outside of the drop opening 181b.

[0219] According to this structure, the bottom cover 183 can open the drop opening 181b of the cup body 181 in a fully open state.

[0220] In addition, a shaft support portion H2 for supporting the hinge shaft H1 and a reinforcing rib H3 for reinforcing the shaft support portion H2 are provided on the outer peripheral surface of the cup body 181. The reinforcing rib H3 includes a first reinforcing rib H3R provided on one end side of the hinge shaft H1 and a second reinforcing rib H3L provided on the other end side of the hinge shaft H1.

[0221] According to this structure, the strength of the hinge part H is improved by reinforcing rib H3. Therefore, it is possible to prevent the hinge part H from being damaged due to repeated opening and closing of the bottom cover 183.

[0222] Additionally, the seedling supply device 38 includes: a conveying mechanism 177 that conveys seedling supply cups 171 and 172 along a conveying path R1 that is circular in plan view; an inner member B1 disposed on the inner side of the conveying path R1 along the conveying path R1; and an outer member B2 disposed on the outer side of the conveying path R1 along the conveying path R1. The seedling supply cups 171 and 172 have guide portions B3 that guide the conveying of the seedling supply cups 171 and 172 along the conveying path R1. The guide portions B3 include an inner guide portion B3R that abuts against the inner member B1 and an outer guide portion B3L that abuts against the outer member B2.

[0223] According to this structure, the seedling supply cups 171 and 172 can be stably transported along the transport path R1 while preventing them from tilting.

[0224] In addition, the inner guide portion B3R has a first portion B3R1 that abuts against the lower surface of the inner member B1 and a second portion B3R2 that abuts against the surface of the inner member B1 on the conveying path R1 side.

[0225] According to this structure, the up-and-down movement of the seedling supply cups 171 and 172 can be prevented, and the seedling supply cups 171 and 172 can be stably transported along the transport path R1.

[0226] The foregoing has described one embodiment of the present invention, but it should be considered that the embodiments disclosed herein are illustrative in all respects and not restrictive. The scope of the present invention is not limited by the foregoing description but is set forth in the claims, including all modifications within the meaning and scope of the claims.

[0227] Explanation of reference numerals in the attached figures

[0228] 3. Transplantation machine

[0229] 38 Seedling Supply Device

[0230] 39 Planting device

[0231] 171 seedling supply cups

[0232] 172 seedling supply cups

[0233] 177 Transmission Mechanism

[0234] 181 cups main body

[0235] 181a receiver port

[0236] 181b landing point

[0237] 183 bottom cover

[0238] 187 chairs

[0239] 187A Front Chair

[0240] 187B Front Chair

[0241] 187C Rear Chair

[0242] 187D Rear Chair

[0243] 189 seedling trays

[0244] 189a Receiving Recess

[0245] 189b slot

[0246] 190 years of Miaotai

[0247] 190a mounting section

[0248] 190b Guiding Department

[0249] 190c frame

[0250] B1 Inner guide component

[0251] B2 Outer guide component

[0252] B3 Guiding Section

[0253] B3R inner guide section

[0254] B3L outer guide section

[0255] B3R1 Part 1

[0256] B3R2 Part 2

[0257] P Restriction Section

[0258] P1 ridge

[0259] P2 Contact Section

[0260] R1 teleportation path

[0261] H hinge section

[0262] H1 hinge axis

[0263] H2 shaft support section

[0264] H3 Reinforcing Rib

[0265] H3R First Reinforcing Rib

[0266] H3L Second Reinforcing Rib

[0267] F Force-applying component

[0268] N seedlings

[0269] S pedal

Claims

1. A transplantation machine, characterized in that, The above-mentioned transplantation machine has the following features: The planting device plants the seedlings in the field; The seedling supply device supplies seedlings to the aforementioned planting device; and A seedling platform for holding seedling trays, which contain seedlings supplied to the aforementioned seedling supply device. The aforementioned seedling tray has multiple receiving recesses arranged in a horizontal and vertical direction on its upper surface to individually accommodate seedlings, and a groove formed between adjacent receiving recesses and extending along the aforementioned parallel direction on its lower surface. The aforementioned seedling platform has a mounting section for holding the seedling tray and a guide section for guiding the movement of the seedling tray on the mounting section. The guide portion protrudes upward compared to the mounting portion and extends in a width direction orthogonal to the front-back direction of the transplanting machine. When the seedling tray is placed on the mounting portion, it enters the groove and extends along the groove, guiding the movement of the seedling tray in the width direction on the mounting portion. By sliding the seedling tray along the guide section, the seedling tray can be slid from the side of the transplanter along the width direction and supplied to the mounting section.

2. The transplantation machine according to claim 1, characterized in that, The aforementioned guide extends from one end of the aforementioned seedling platform in the aforementioned width direction to the other end.

3. The transplantation machine according to claim 1, characterized in that, The aforementioned seedling platform has a frame that appears quadrilateral when viewed from above, and The aforementioned guide section connects the two opposite sides of the aforementioned frame.

4. The transplantation machine according to claim 1, characterized in that, The aforementioned transplanting machine is equipped with a chair where the operator can sit while the seedlings are supplied to the seedling supply device. The aforementioned chairs include a front chair positioned in front of the seedling supply device and a rear chair positioned behind the seedling supply device. The seedling platform is configured above the seedling supply device and between the front chair and the rear chair, and the guide extends along the width direction.

5. The transplantation machine according to claim 1, characterized in that, The aforementioned seedling platforms include multiple seedling platforms arranged in a vertical direction. A footboard is provided on the outer side of the aforementioned seedling platform in the width direction and at a position higher than the ground. This footboard allows the operator to climb on it when placing the seedling tray onto the seedling platform.

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