Seedling transplanting work machine

Abstract

To enable seedling transplanting work to be performed using a tractor by providing a seedling transplanting work machine mounted on the tractor, in order to solve such a problem that, even though there are a rotary tilling work machine and a seeding machine mounted on a tractor, there is no seedling transplanting work machine mounted on the tractor, the seedling transplanting work cannot be performed using the tractor.SOLUTION: There is provided a seedling transplanting work machine in which a transplanting work unit 32 is provided in a vertically movable manner via a link 31 in an attachment frame 30 mounted to a lifting link device 3 of a tractor 2.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a seedling transplanting machine that is mounted on a tractor to perform seedling transplanting work.

Background Art

[0002] There are rotary tilling machines and seeding machines mounted on tractors (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] There was no seedling transplanting machine to be mounted on a tractor, and seedling transplanting work could not be performed with a tractor.

[0005] The present invention has been made in view of the above, and an object thereof is to provide a seedling transplanting machine to be mounted on a tractor so that seedling transplanting work can be performed with the tractor.

Means for Solving the Problems

[0006] The invention according to claim 1 is a seedling transplanting machine in which a transplanting work unit 32 is provided freely movable up and down by a link 31 on a mounting frame 30 mounted on a lift link device 3 of a tractor 2.

[0007] According to the invention described in claim 1, since it is a seedling transplanting machine in which a transplanting work unit 32 is provided freely movable up and down by a link 31 on a mounting frame 30 mounted on a lift link device 3 of a tractor 2, seedling transplanting work can be performed with the tractor 2.

[0008] The invention according to claim 2 is the seedling transplanter according to claim 1, wherein hydraulic oil is supplied and discharged from the tractor 2 via the hydraulic hose 35, and a lifting hydraulic cylinder or a lifting valve 34 that operates the link 31 to raise and lower the transplanting work unit 32 is provided to hold the transplanting work unit 32 at a predetermined height.

[0009] The invention according to claim 3 is the seedling transplanter according to claim 2, which is provided with a transmission case 30 that houses a planting clutch and an inter-row speed change device and transmits driving force to the transplanting work unit 32.

[0010] The invention according to claim 4 is the seedling transplanter according to claim 3, in which driving force is transmitted to the transmission case 30 by the PTO shaft 13 of the tractor 2.

[0011] The invention according to claim 5 is the seedling transplanter according to any one of claims 1 to 4, which is provided with left and right auxiliary wheels 50, 50 on the left and right of the mounting frame 30.

Brief Description of the Drawings

[0012]

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Mode for Carrying Out the Invention

[0013] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

[0014] <Overall Configuration> FIG. 1 and FIG. 2 are a side view and a plan view of a rice transplanter 1, which is an embodiment of the seedling transplanting machine of the present invention, mounted on a tractor 2.

[0015] The rice transplanter 1 is mounted on the rear side of the tractor 2 so as to be liftable via a lift link device 3.

[0016] Here, the left and right directions are referred to as left and right, respectively, toward the forward direction of the tractor 2, and the forward and backward directions are referred to as front and rear, respectively.

[0017] <Tractor 2> As shown in FIGS. 1 and 2, the tractor 2 is a four-wheel drive vehicle including a pair of left and right front wheels 10, 10 which are drive wheels and a pair of left and right rear wheels 11, 11. An engine 12 is mounted on the front part of the machine body, and the power of the engine 12 is shifted by a transmission and taken out separately as traveling power and external extraction power.

[0018] Part of the traveling power is transmitted to the front wheel final case to drive the front wheels 10, 10, and the rest is transmitted to the rear wheel gear case to drive the rear wheels 11, 11.

[0019] The externally extracted power is transmitted to the rice transplanter 1, which is a working machine, by the PTO shaft 13 provided at the rear of the tractor 2.

[0020] The upper, front, and left and right parts of the engine 12 are covered by the bonnet 14.

[0021] On the upper part of the bonnet 14, a GNSS antenna 15 for receiving radio waves from positioning satellites and a transceiver 16 are provided. The control device 17 calculates the current position by the positioning system, transmits and receives with the remote control 18 described later by the transceiver 16, and displays it on the monitor 19 of the remote control 18. Details of the remote control 18 will be described later.

[0022] Also, various operating mechanisms are equipped on the rear upper part of the bonnet 14, and a steering wheel 20 for steering the front wheels 10, 10 is provided above it.

[0023] A floor step 21 and a driver's seat 22 are provided behind the bonnet 14, and left and right fenders 23 covering above the rear wheels 11, 11 are provided on both left and right sides of the driver's seat 22.

[0024] Mounting and dismounting steps 24 are provided at the left and right ends of the floor step 21.

[0025] As shown in FIGS. 3 and 4, a circular brush 25 is rotatably provided on the mounting and dismounting step 24 by a pivot shaft 25a so that when an operator boards the machine from the field, the mud attached to boots or the like can be removed by the brush 25.

[0026] In addition, an electric motor for driving the brush 25 and a proximity sensor for detecting that the operator's foot has approached may be provided so that when the operator approaches the brush 25 on the mounting and dismounting step 24 with the foot, the brush 25 is rotationally driven by the electric motor.

[0027] <Rice transplanter 1> The rice transplanter 1 is configured such that a transplanting work unit 32 is provided so as to be freely movable up and down by a parallel link 31 on a transmission case 30 that also serves as a mounting frame mounted on the rear end portion of a lift link device 3 of a tractor 2.

[0028] The transmission case 30 has a driving force transmitted thereto by a PTO shaft 13 of the tractor 2, has a planting clutch and an inter - row speed change device installed therein, and has a driving force transmitted to the transplanting work unit 32 by a planting transmission shaft 33.

[0029] An elevation valve 34 is provided on the upper surface of the transmission case 30. Operating oil is supplied and discharged from the tractor 2 via a hydraulic hose 35, and the elevation valve 34 expands and contracts an elevation hydraulic cylinder that moves the parallel link 31 up and down, causing the transplanting work unit 32 to move up and down.

[0030] The transplanting work unit 32 includes a transmission case 37 fixed to a frame 36 provided in the left - right direction, a seedling placing table 38 that is configured by arranging seedling placing portions 38a for placing soil - attached mat - shaped seedlings side by side in the left - right direction and reciprocates left and right, and a seedling planting device 39 that takes out seedlings one by one from the lower ends of the respective seedling placing portions 38a of the seedling placing table 38 and plants them in the field.

[0031] At the lower part of the rice transplanter 1, a center float 40 is provided at the center, and left and right side floats 41 are provided on both left and right sides thereof.

[0032] When the machine body is advanced with these floats 40, 41 in contact with the muddy surface of the field, the floats 40, 41 slide while leveling the muddy surface, and seedlings are planted by the seedling planting device 39 in the leveling trace.

[0033] Each of the floats 40 and 41 is rotatably attached so that the front end side moves up and down according to the unevenness of the field topsoil surface. During the planting operation, the vertical movement of the front part of the center float 40 is detected by the angle of attack control sensor, and according to the detection result, the lift valve 34 that controls the lift hydraulic cylinder is switched to lift and lower the parallel link 31 to lift and lower the rice transplanter 1, thereby always maintaining the constant planting depth of the seedlings.

[0034] Note that the lift link device 3 of the tractor 2 is lifted and lowered when attaching and detaching the rice transplanter 1 to and from the tractor 2. After attaching the rice transplanter 1, the lift link device 3 is fixed to maintain the rice transplanter 1 at a predetermined height. Therefore, during the seedling planting operation, the parallel link 31 of the rice transplanter 1 is lifted and lowered as described above to lift and lower the rice transplanter 1.

[0035] The parallel link 31 includes a pair of left and right upper links 31a and 31a and a pair of left and right lower links 31b and 31b.

[0036] These upper and lower links 31a and 31b are rotatably attached to a link base frame 42 erected on the transmission case 30 at their base sides, and a vertical link 43 is connected to their tip sides. And a connecting shaft rotatably supported by the rice transplanter 1 is inserted and connected to the lower end of the vertical link 43, and the rice transplanter 1 is connected so as to be rollable around the connecting shaft.

[0037] In short, the rice transplanter 1 is attached to the lift link device 3 of the tractor 2, and the transplanting operation unit 32 is provided freely liftable by the parallel link 31 on the transmission case 30 which also serves as a mounting frame for mounting the rice transplanter 1 on the lift link device 3 of the tractor 2. Therefore, the performance as a riding type seedling transplanter can be exhibited using the tractor 2.

[0038] In addition, the rice transplanter 1 expands and contracts a lift hydraulic cylinder that operates the parallel link 31 by a lift valve 34 provided in a transmission case 30 that also serves as a mounting frame attached to the lift link device 3 of the tractor 2, causing the transplanting work unit 32 to move up and down. Therefore, only the hydraulic oil is supplied and discharged from the tractor 2 via the hydraulic hose 35, and the rice transplanter 1 itself can move the transplanting work unit 32 up and down to perform the seedling transplanting work without obtaining complicated control from the tractor 2.

[0039] In addition, the rice transplanter 1 has a drive system as a seedling transplanter, such as a planting clutch and an inter-row speed change device, installed inside the transmission case 30, and the driving force is transmitted only from the tractor 2 via the PTO shaft 13, so that the seedling transplanting work can be performed without the tractor 2 performing complicated drive switching.

[0040] That is, no matter what kind of tractor 2 is used, the performance as a seedling transplanter can be fully exhibited, and the adaptability is high.

[0041] Figs. 5 and 6 show another embodiment in which left and right auxiliary wheels 50, 50 are provided on the rice transplanter 1.

[0042] That is, four left and right auxiliary wheels 50, 50 with a diameter of about 500 mm or less are arranged across the left and right sides of the transmission case 30 in front of the left and right side floats 41 so as to be rotatable freely.

[0043] The left and right auxiliary wheels 50, 50 are provided so as to be movable up and down by a predetermined amount.

[0044] Therefore, even if the tractor 2 greatly tilts back and forth during the transplanting work, since the rice transplanter 1 is configured to be pulled by the left and right auxiliary wheels 50, 50, it is possible to prevent the rice transplanter 1 from greatly rising from the field or being pressed against the field and sinking, and an appropriate seedling transplanting work can be performed.

[0045] Also, when the lift link device 3 of the tractor 2 is operated to raise the rice transplanter 1, if the lifting amount is such that the left and right auxiliary wheels 50, 50 are in contact with the ground, the front-rear balance can be maintained, the traveling performance can be maintained, and the uphill performance when entering and leaving the field is also good.

[0046] <Remote control 18> Figures 7 to 13 show a remote control 18 for operating a tractor 2 equipped with a rice transplanter 1.

[0047] As shown in Figure 7, the remote control 18 is provided with a grip portion 60 at the left end, a main operation lever 61 at the right end, an engine switch 62 for starting and stopping the engine 12 above the main operation lever 61, a monitor 19 for displaying various operation settings of the tractor 2 and various information of the detection devices at the central portion, and a ridge clutch switch 63 for stopping the seedling planting devices 39 in two rows each and a monitor operation dial 64 for performing the display setting of the monitor 19 at the lower portion.

[0048] As shown in Figure 8, when the main operation lever 61 is operated forward and backward, the tractor 2 moves forward and backward, and when it is operated left and right, the tractor 2 turns the steering wheel 20 left and right.

[0049] And, as shown in Figure 9, the greater the amount of operation of the main operation lever 61 forward and backward, the faster the forward and backward speeds of the tractor 2 become.

[0050] Also, when the main operation lever 61 is operated forward and backward to an intermediate position and then the hand is released, it automatically returns to the neutral position (stop position), and when it is operated forward and backward to the maximum position, the main operation lever 61 is fixed, and the speed is maintained until the hand is released and it is manually returned to the neutral position side.

[0051] And, as shown in Figure 10, the greater the amount of operation of the main operation lever 61 left and right, the greater the left and right operation amount of the steering wheel 20 of the tractor 2 becomes.

[0052] In addition, when the main operation lever 61 is operated halfway to the left or right, it automatically returns to the straight-ahead position when the hand is released. When the main operation lever 61 is operated to the maximum left or right position, the main operation lever 61 is fixed, and the left and right operation amounts of the handle 20 are maintained until it is manually returned to the straight-ahead position side even when the hand is released.

[0053] As shown in FIG. 11, on the left side surface of the main operation lever 61, an up-switch 65 is provided which, when pressed once, disengages the planting clutch to cut the transmission to the transplanting working part 32 of the rice transplanter 1, and when pressed again, raises the transplanting working part 32. A down-planting switch 66 is provided which, when pressed once, lowers the transplanting working part 32, and when pressed again, engages the planting clutch to engage the transmission to the transplanting working part 32.

[0054] Then, as shown in FIGS. 12 and 13, the operation amount by which the handle 20 is operated left and right by the main operation lever 61 is displayed on the monitor 19 so that it can be known.

[0055] That is, a handle diagram 19a of the handle 20 is displayed on the monitor 19. When the handle 20 is in the straight-ahead state and not operated left or right, an up-arrow 19S is displayed. When the handle 20 is operated left, a left-arrow 19L is displayed. Around the handle diagram 19a, the operation amount is displayed on the circumferential line 19b according to the operation amount.

[0056] When the handle 20 is operated right, a right-arrow 19R is displayed. Around the handle diagram 19a, the operation amount is displayed on the circumferential line 19b according to the operation amount.

[0057] When the handle 20 is operated more than 360 degrees, the operation amount is displayed on the second circumferential line 19b according to the operation amount.

[0058] Therefore, when the handle diagram 19a of the handle 20 is displayed on the monitor 19, and when the handle 20 is in a straight-ahead state and not being operated left or right, the up arrow 19S is displayed, and the operation direction is displayed by the left and right arrows 19L, 19R and the operation amount is displayed by the circular line 19b. Thus, the operator can immediately understand the operation direction and the operation amount from the image display on the monitor 19, and can appropriately operate the handle 20 with the main operation lever 61.

Explanation of Signs

[0059] 2 Tractor 3 Lifting Link Device 13 PTO Shaft 30 Mounting Frame (Transmission Case) 31 Link 32 Transplanting Working Section 34 Lifting Valve 35 Hydraulic Hose 50 Left and Right Auxiliary Wheels

Claims

1. A seedling transplanter, characterized in that a transplanting work part (32) is provided on a mounting frame (30) mounted on a lift link device (3) of a tractor (2) so as to be freely movable up and down by a link (31).

2. The seedling transplanter according to claim 1, characterized in that a lift hydraulic cylinder or a lift valve (34) for supplying and discharging hydraulic oil from a tractor (2) via a hydraulic hose (35) to operate a link (31) to lift and lower the transplanting work part (32) is provided to hold the transplanting work part (32) at a predetermined height.

3. The seedling transplanter according to claim 2, characterized in that a transmission case (30) incorporating a planting clutch and an inter-row speed change device and transmitting driving force to the transplanting work part (32) is provided.

4. The seedling transplanter according to claim 3, characterized in that driving force is transmitted to the transmission case (30) by a PTO shaft (13) of a tractor (2).

5. The seedling transplanter according to any one of claims 1 to 4, characterized in that left and right auxiliary wheels (50, 50) are provided on the left and right of the mounting frame (30).

Images