Transplanting vehicle

Abstract

The present invention aims to make it easier to raise and lower the stand that stops and fixes the machine body in a transplanting vehicle equipped with a transplanting device. [Solution] A transplanting work vehicle is provided in which a planting device 50 is mounted on a main frame 6 that runs on left and right front wheels 8L, 8R and left and right rear wheels 7L, 7R, and step frames 71L, 71R are provided on the sides of the left and right rear wheels 7L, 7R that make contact with the ground on left and right support wheels 74L, 74R, and when the vehicle stops, the left and right support wheels 74L, 74R of the step frames 71L, 71R are driven in reverse to lift the rear of the main frame 6 and assist in raising the stand 30.

Description

Technical Field

[0001] The present invention relates to a transplanting work vehicle for transplanting potato seed tubers or vegetable seedlings into an agricultural field.

Background Art

[0002] As a work vehicle for transplanting potato seed tubers, there is the transplanting work vehicle described in Patent Document 1.

Prior Art Literature

Patent Literature

[0003]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0004] In the transplanting work vehicle, step frames on which workers ride are provided on the left and right sides of an engine-driven body, and a worker riding on the step frame performs transplanting work while supplying seed tubers to a transplanting supply device. When the transplanting work vehicle is stored and placed in a barn, a stand provided at the rear of the body is grounded to prevent the body from moving, but it is difficult to erect the stand because the rear portion of the body is heavy.

[0005] An object of the present invention is to make it easy to erect a stand that stops and fixes a body in a transplanting work vehicle provided with a transplanting device.

Means for Solving the Problem

[0006] The above-mentioned problem of the present invention is solved by the following technical means.

[0007] The invention of claim 1 is a transplanting work vehicle in which a planting device 50 is mounted on a main frame 6 that runs on left and right front wheels 8L, 8R and left and right rear wheels 7L, 7R, and step frames 71L, 71R that make contact with the ground on left and right support wheels 74L, 74R are provided on the sides of the left and right rear wheels 7L, 7R, characterized in that when the vehicle stops, the left and right support wheels 74L, 74R of the step frames 71L, 71R are driven in reverse to lift the rear of the main frame 6 and assist in raising the stand 30.

[0008] The invention of claim 2 is the transplanting vehicle according to claim 1, characterized in that the left and right support wheels 74L and 74R are driven forward when the stand 30 is removed. [Effects of the Invention]

[0009] In the invention of claim 1, in order to stably stop the machine by raising the stand 30 provided at the rear of the transplanting work vehicle, the drive of the left and right front wheels 8L and 8R is stopped, and then the stand 30 is pressed down to lift the left and right rear wheels 7L and 7R at the rear of the machine. At that time, if the left and right support wheels 74L and 74R of the step frame 71L and 71R are driven in reverse, the machine will be supported by the left and right front wheels 8L and 8R and the rear of the machine will be lifted, making it easier to raise the stand 30.

[0010] In the invention of claim 2, when the upright stand 30 is removed, the left and right support wheels 74L and 74R are brought to the ground and rotate in a forward drive manner, so that the rear of the machine gradually lowers as it touches the ground, resulting in a stable driving posture. [Brief explanation of the drawing]

[0011] [Figure 1] This is a side view of a transplanting vehicle according to an embodiment of the present invention. [Figure 2] This is a plan view of the transplanting vehicle. [Figure 3] This is a rear view of the transplanting vehicle. [Figure 4] This is a diagram illustrating the arrangement of the stand for a transplanting vehicle according to an embodiment of the present invention. [Figure 5]This is a perspective view showing the reverse drive rotation of the left and right support wheels that assist in raising the stand of the transplanting vehicle according to an embodiment of the present invention. Specifically, this is a perspective view showing the reverse drive rotation of the left and right support wheels that assist in raising the stand of the transplanting vehicle according to an embodiment of the present invention, with (a) forward driving and (b) reverse driving. [Modes for carrying out the invention]

[0012] Preferred embodiments of the present invention will be described below with reference to the drawings.

[0013] A potato transplanting machine is described below as one form of the transplanting vehicle of this invention. In the following description, the side where the steering wheel 2 is located is referred to as the rear, and the opposite side, i.e., the side where the engine 3 is located, is referred to as the front. Furthermore, the right side of the front of the machine is referred to as the right, and the left side as the left.

[0014] As shown in Figures 1 to 3, this transplanter comprises a vehicle body 1 that allows the machine to move forward, a steering handle 2 for walking control located at the rear of the vehicle body 1, a planting device 50 for planting potatoes in the field, and a supply device 60 for supplying potatoes to the planting device 50.

[0015] The vehicle body 1 comprises an engine 3, a transmission case 4 that transmits the power of the engine 3 to various parts by changing the speed, left and right rear wheels 7L and 7R which are drive wheels that rotate using the power of the transmission case 4, and left and right front wheels 8L and 8R which are supported to roll freely in front of the left and right rear wheels 7L and 7R.

[0016] On both the left and right sides of the transmission case 4, left and right wheel drive shafts 9L and 9R protrude, and left and right sliding bodies 5L and 5R are fitted onto the left and right wheel drive shafts 9L and 9R respectively so as to be movable in the left and right direction. The front parts of the long front and rear running case bodies 10L and 10R are rotatably attached to the left and right sliding bodies 5L and 5R respectively.

[0017] The left and right sliding bodies 5L, 5R are connected via left and right connecting arms 24L, 24R to left and right cylindrical bodies 20L, 20R respectively. The left and right cylindrical bodies 20L, 20R are provided on left and right support rods 11L, 11R extending in the left-right direction from the main frame 6, each being capable of left-right movement and fixable by a pin 14.

[0018] Therefore, by removing the pin 14 and moving the left and right cylindrical bodies 20L, 20R left and right along the left and right support rods 11L, 11R, the left and right case bodies 10L, 10R can be moved left and right to change the tread width of the left and right rear wheels 7L, 7R.

[0019] Furthermore, the left and right support rods 11L, 11R are provided with a plurality of pin holes 14a in the left-right direction for inserting the pin 14, and after the tread width is changed, the left-right movement of the left and right case bodies 10L, 10R can be fixed by the pin 14.

[0020] The left and right rear wheels 7L, 7R are mounted on left and right axles 12L, 12R that protrude laterally from the rear side of the left and right case bodies 10L, 10R.

[0021] Further, the left and right case bodies 10L, 10R are connected with a driving means that pivots up and down to move the left and right rear wheels 7L, 7R up and down with the front sides of the left and right case bodies 10L, 10R as pivoting fulcrums.

[0022] Specifically, upwardly extending left and right arms 13L, 13R are integrally attached to the front portions of the left and right case bodies 10L, 10R. These arms are connected to the left and right sides of a connecting body attached to the tip of the piston rod of a lifting hydraulic cylinder (not shown) fixed to the transmission case 4. One of the left and right sides (the right side) is connected by a rod, and the other side (the left side) is connected by a left-right tilt control hydraulic cylinder (not shown) that can expand and contract according to the tilt of the machine body.

[0023] When the lifting hydraulic cylinder is activated and its piston rod extends to the rear of the aircraft, the left and right arms 13L and 13R rotate backward, and consequently the left and right case bodies 10L and 10R rotate downward, causing the aircraft to rise. Conversely, when the piston rod of the lifting hydraulic cylinder moves forward and retracts into the cylinder, the left and right arms 13L and 13R rotate forward, and consequently the left and right case bodies 10L and 10R rotate upward, causing the aircraft to descend.

[0024] This lifting hydraulic cylinder is operated by a ground sensor that makes contact with the furrow surface and operates in response to changes in the vertical distance between the machine and the furrow surface. The ground sensor detects the height of the furrow surface relative to the machine, and the lifting hydraulic cylinder is configured to operate based on the detection by the ground sensor so that the machine is moved to a set height relative to the furrow surface.

[0025] Furthermore, the system is configured such that the lifting hydraulic cylinder is operated by a user operating a planting / lifting control device 15 located near the control handle 2, which allows the machine to be manually raised or lowered. This planting / lifting control device 15 is also configured to switch the drive of the planting device 50 and the supply device 60 on and off.

[0026] Furthermore, when the hydraulic cylinder for left-right tilt control extends or retracts, the left arm 13L connected to the hydraulic cylinder rotates, causing only the left rear wheel 7 to move up and down, and tilting the machine from side to side. This hydraulic cylinder for left-right tilt control operates to keep the machine horizontal based on the detection results of the left-right tilt sensor located in the left-right center of the machine.

[0027] The left and right front wheels 8L and 8R are rotatably mounted on axles 18L and 18R fixed to the sides of vertically long vertical frames attached to the left and right sides of a horizontal frame 16, which is mounted at the left and right center position below the engine 3 so as to be rotatable around the longitudinal axis. Therefore, the left and right front wheels 8L and 8R are able to roll freely around the longitudinal axis at the left and right center of the machine. The vertical frames are provided on both the left and right sides of the horizontal frame 16 so as to be vertically adjustable, allowing the height of the left and right front wheels 8L and 8R to be adjusted.

[0028] The control handle 2 is located at the rear of the aircraft, behind the left and right axles 12L and 12R of the left and right rear wheels 7L and 7R.

[0029] Specifically, the control handle 2 is attached to the rear end of the aircraft frame 19, which has its front end fixed to the main frame 6 that houses the engine 3 and transmission case 4.

[0030] The aircraft frame 19 extends rearward from the left-right center of the aircraft, and also extends diagonally upward and rearward from the front-rear middle section. The control handle 2 extends rearward to the left and right from the rear end of the aircraft frame 19, with each of its rear ends serving as the left and right grip sections of the control handle 2.

[0031] The planting device 50 includes a beak-shaped planting body 21 with its tip pointing downward, an up-and-down movement mechanism 22 that moves the planting body 21 up and down between a position where the lower end of the planting body 21 is above the field surface and a position where it is below the field surface, and an opening and closing mechanism that opens and closes the planting body 21 into a closed state in which the lower end of the beak-shaped planting body 21 is closed to receive potatoes from above and store potatoes inside, and an open state in which the lower end of the planting body 21 is opened to the left and right to release the potatoes stored inside downward.

[0032] The supply device 60 includes a plurality of containers 23 that receive potatoes from above and house the potatoes inside, a moving mechanism that rotates the containers 23 so that they pass above the planting body 21, and an opening mechanism that opens the bottom of the containers 23 at a position above the planting body 21, allowing the potatoes housed inside to fall and supply potatoes to the planting body 21, thus serving as a potato drop supply mechanism.

[0033] Furthermore, a storage section 60a for storing potatoes to be supplied to the container 23 is provided at the center of the upper surface of the supply device 60.

[0034] The planting device 50 has a single-row planting configuration in which one planting unit 21 is positioned in the center of the left and right sides of the machine.

[0035] The planting unit 21 is mounted on a vertical movement mechanism 22 located on the right side of the planting transmission case 26, which is driven by power from the mission case 4. The planting transmission case 26 is fixed to the machine frame 19.

[0036] The vertical movement mechanism 22 has upper and lower lifting links, the front of which is mounted to the planting transmission case 26 so as to be able to rotate up and down, and the rear of which is connected to the planting body 21. A separately provided drive mechanism uses power from inside the planting transmission case 26 to move the upper and lower lifting links up and down, causing the planting body 21 to move up and down. In the raised position, the lower end of the planting body 21 is positioned above the field surface, and in the lowered position, the lower end of the planting body 21 is positioned below the field surface.

[0037] The opening and closing mechanism of the planting body 21 is operated by power from inside the planting transmission case 26 and, in conjunction with the operation of the vertical movement mechanism 22, opens the lower side of the planting body 21 forward and backward when the planting body 21 reaches the lower lowered end position, opening it downward, and closes the lower side of the planting body 21 when the planting body 21 reaches the upper raised end position, closing it.

[0038] The opening mechanism of the supply device 60 is configured such that when the container 23 passes above the planting body 21, the bottom lid is released from the support and rotates downward, opening the container 23 so that the potatoes inside can fall downward. The opening timing of the bottom lid of the container 23 is adjusted so that it opens when the planting body 21 rises to directly below the container 23.

[0039] This transplanting machine has soil-covering wheels positioned near the rear left and right sides of the planting area of ​​the planting unit 21 to compact the soil covering the potatoes planted by the planting unit 21.

[0040] This soil-covering wheel is mounted freely on a soil-covering wheel support frame, which has its front end pivotally supported on the main frame 9 so as to be able to rotate up and down.

[0041] The soil-covering and compaction wheel support frame has a U-shape at the rear when viewed from above, and is constructed by bending a pipe frame as needed.

[0042] The lower end of a vertically extending rod is connected to the rear end of the soil-covering wheel support frame, and the upper part of the rod is passed through the tip of a pipe-shaped left and right frame that extends to the right from the machine frame 19, which is located off-center to the left of the machine body, thereby supporting it so as to be able to move up and down.

[0043] Therefore, the soil-covering and compacting wheel is supported so as to be able to move up and down on left and right frames that extend to the right from the machine frame 19, which is positioned off-center to the left of the machine body. This allows it to be supported in a way that allows it to follow the up and down movement of the ridges by utilizing the empty space on the right side of the machine frame 19.

[0044] An operating section 43 is provided at the left-right center position of the control handle 2.

[0045] Furthermore, the throttle lever 44 for the engine 3 is located near the left grip of the control handle 2.

[0046] Additionally, there are left and right boarding steps (70L and 70R) located behind the left and right rear wheels (7L and 7R), allowing workers to board during transplant operations.

[0047] The left and right boarding steps 70L and 70R are composed of flat iron perforated metal plates 72L and 72R, which are welded to the upper surface of the step frames 71L and 71R.

[0048] The front ends of the step frames 71L and 71R are pivotally supported by pivot pins 73L and 73R that are coaxial with the left and right axles 12L and 12R, which are fixed to the outer surfaces of the rear ends of the left and right case bodies 10L and 10R, respectively, allowing the rear end to rotate freely up and down.

[0049] On the lower rear side of the step frames 71L and 71R, left and right support wheels 74L and 74R are mounted, respectively, on left and right support wheel axles 75L and 75R, allowing them to rotate freely.

[0050] At the rear of the step frames 71L, 71R, the left and right connecting engagement members 76L, 76R provided on the upper surfaces of the left and right flat perforated metal plates 72L, 72R are configured to rotatably engage with the left and right shaft portions 78L, 78R at the left and right lower ends of the gate-shaped connecting frame 77, which connects the rear of the left and right boarding steps 70L, 70R in a front view.

[0051] The connecting frame 77 is constructed by inserting the left and right frames 77L and 77R, which extend in the left-right direction at the top, into the left and right shaft portions 79 on both sides of the joint pipe 80, which serves as a connecting material, and fixing them with fixing pins 81.

[0052] The left and right shaft sections 79 are provided with multiple pin holes in the left-right direction for inserting fixing pins 81, allowing the left-right width of the connecting frame 77 to be changed.

[0053] Therefore, when changing the tread width of the left and right rear wheels 7L and 7R by moving the left and right case bodies 10L and 10R from side to side, the fixing pins 81 can be removed to allow the left and right frames 77L and 77R to move from side to side, making it easy to change the tread width of the left and right rear wheels 7L and 7R. After changing the tread width, the fixing pins 81 can be inserted into the corresponding pin holes to fix the left and right width of the connecting frame 77.

[0054] Furthermore, the left and right shaft portions 79 of the connecting frame 77 are located above the aircraft frame 19 at a position behind the supply device 60, and the connecting frame 77 has a gantry-like configuration that straddles the aircraft frame 19.

[0055] Furthermore, the base of a U-shaped guide body 82, which is open at the top and has a side view, is welded to the aircraft frame 19 to guide the left and right axis portions 79 of the connecting frame 77 to move in the vertical direction.

[0056] Therefore, when the left and right support wheels 74L and 74R move up and down due to unevenness and elevation of the field surface, the left and right shaft portions 79 of the gate-shaped connecting frame 77 that straddles the machine frame 19 are positioned above the machine frame 19 at the rear position of the supply device 60, and the left and right shaft portions 79 of the connecting frame 77 are guided in the vertical direction while their forward and backward movement is restricted by the guide body 82, so that the left and right boarding steps 70L and 70R (left and right support wheels 74L and 74R) move up and down appropriately without rattling from side to side.

[0057] Furthermore, when an operator boards the left and right boarding steps 70L and 70R, the left and right boarding steps 70L and 70R are connected by a gate-shaped connecting frame 77 that straddles the machine frame 19, so the operator's weight can be supported by the left and right support wheels 74L and 74R, improving boarding stability.

[0058] Furthermore, because the connecting frame 77 is located behind the supply device 60, when workers get on or off the left and right boarding steps 70L and 70R, the connecting frame 77 also serves as a handrail, allowing for safe boarding and alighting.

[0059] Furthermore, when the left and right rear wheels 7L and 7R are lowered and the aircraft is raised to turn, the rising of the aircraft causes the guide body 82 to lift the left and right shaft portions 79 of the connecting frame 77, causing the rear portions of the left and right boarding steps 70L and 70R to rotate around the pivot pins 73L and 73R and rise away from the field surface. In addition, the load of the left and right boarding steps 70L and 70R is applied to the rear of the aircraft, making it easy to turn the aircraft by pushing down the control handle 2 and lifting the left and right front wheels 8L and 8R off the field surface.

[0060] Furthermore, by providing multiple left-right connecting engagement members 76L, 76R in the front-rear direction of the left and right boarding steps 70L, 70R, the lowest position of the rear of the left and right boarding steps 70L, 70R (left and right support wheels 74L, 74R) can be changed by selecting which of the multiple left-right connecting engagement members 76L, 76R the left and right shaft portions 78L, 78R at the left and right lower ends of the connecting frame 77 engage with.

[0061] This transplanting machine is equipped with a worker's seat 46 so that an operator can sit on it and perform the potato replenishment work on the supply device 60.

[0062] Specifically, the worker's seat 46 is positioned above the left boarding step 70L, which is to the left rear of the supply device 60, facing forward or forward-right (facing the supply device 60).

[0063] A seat support frame 83 made of pipe material is welded and fixed to the vertical frame portion of the left frame 77L of the connecting frame 77, and a seat support column 84 extending downward from the bottom surface of the worker's seat 46 is inserted into the seat support frame 83 to form the support structure for the worker's seat 46.

[0064] Furthermore, a compression spring is provided in the insertion hole of the seat support frame 83, and the worker's seat 46 moves up and down by this compression spring, allowing the worker to work comfortably.

[0065] Therefore, the worker sitting in seat 46 can sit facing the supply device 60 and easily perform the task of taking potatoes from the storage section 60a and supplying them to the left rear side of the supply device 60 in a comfortable posture.

[0066] Furthermore, since the throttle lever 44 for the engine 3 is located near the left grip of the control handle 2, the operator can increase or decrease the speed of the engine 3 while seated in the operator's seat 46, resulting in improved operability.

[0067] Furthermore, since the worker's seat 46 is attached to the connecting frame 77, the weight of the worker seated in the worker's seat 46 can be supported by the left and right support wheels 74L and 74R, improving riding stability.

[0068] In the diagram, 88L and 88R are wheel covers that cover the rear of the left and right rear wheels 7L and 7R, respectively, located at the front ends of the left and right boarding steps 70L and 70R, to prevent soil and other debris from falling onto the left and right boarding steps 70L and 70R.

[0069] Figures 4 and 5 show a stand 30 located at the rear end of the main frame 6, with a handle extending from between the second and third compaction wheels of the planting device 50, and positioned behind the left and right rear wheels 7L and 7R. A support shaft 32 is attached to the pivot shaft 33 of the mounting bracket 31, and a pedal 32A is provided on the support shaft 32 via a curved section 32B. The curved section 32B is rounded and bulges outwards towards the rear, preventing injury to the worker's foot if it bumps into it. When storing the transplanting vehicle in a barn, the stand 30 is erected, lifting the left and right rear wheels 7L and 7R off the ground with a grounding bar attached to the lower end of the support shaft 32, allowing the main frame 6 to be stably grounded and fixed with the stopped left and right front wheels 8L and 8R.

[0070] The aforementioned left and right support wheels 74L and 74R are driven in reverse when the left and right front wheels 8L and 8R are stopped using the engine 3, which lifts the rear of the main frame 6 supported by the left and right front wheels 8L and 8R. In this state, when an operator presses down on the pedal 32A, they can use their weight to lightly raise the frame to its upright position.

[0071] Figure 5(a) shows the vehicle in a stopped state after being driven, and Figure 5(b) shows the first invention, in which the left and right support wheels are driven in reverse, and when an operator presses the pedal 32A, they can lightly lift the vehicle by applying their weight. The left and right support wheels 74L(a) and 74R(a) move to 74L(b) and 74R(b) by being driven in reverse 91. At the same time, the step frames 71L(a) and 71R(a) move to step frames 71L(b) and 71R(b). As a result, the angle between the left and right frames 10 and the left and right step frames 71 decreases from 90(a) to 90(b), which lifts the vehicle body 1 and assists in lifting the vehicle body 1 using the stand 30.

[0072] This second invention is the opposite; the stand 30 can be released from the upright position by the forward drive of the left and right support wheels. The stand, step frame, and left and right support wheels move from Figure 5(a) to Figure 5(a). The rotation direction of the left and right support wheels is forward.

[0073] Furthermore, the left and right support wheels 74L and 74R can be equipped with a mechanism that automatically drives the vehicle in reverse when the pedal 32A is pressed while the stand 30 is upright.

[0074] Additionally, a spare platform 85 for placing a container of potatoes is provided on the upper front of the aircraft. [Explanation of Symbols]

[0075] 6 Mainframe 7L,7R Left and right rear wheels 8L,8R Left and right front wheels 30 stands 50 Planting equipment 71L, 71R Step Frame 74L,74R Left and right support wheels

Claims

1. A transplanting vehicle is provided with a main frame (6) that runs on left and right front wheels (8L, 8R) and left and right rear wheels (7L, 7R), on which a planting device (50) is mounted, and step frames (71L, 71R) that make contact with the ground on the sides of the left and right rear wheels (7L, 7R) are provided, characterized in that when the vehicle stops, the left and right support wheels (74L, 74R) of the step frames (71L, 71R) are driven in reverse to lift the rear of the main frame (6) and assist in raising the stand (30).

2. The transplanting vehicle according to claim 1, characterized in that the left and right support wheels (74L, 74R) are driven forward when the stand (30) is removed.

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