JPH03251107A - Operation system for seedling planter - Google Patents

Abstract

PURPOSE:To provide the title system so designed that a single operating lever is made to the operating direction with the lower and higher speed positions for a sub-speed change gear in the rear and front, respectively, and put before the driving seat, thereby making the interlocking of the operating lever easy and speedy. CONSTITUTION:During seedling planting work, an operating lever 12 is gripped while reaching operator's hand forward from the driving seat 6, and the lever 12 is operated from the lower speed position in the rear toward the higher speed position; concurrently with this, a running clutch is put to 'on' while lowering a seedling planting device lifted with the planting clutch in 'off'. Along with this, the planting clutch is put to 'on' to perform seedling planting at the lower speed for a sub-speed change gear. And the operating lever 12 is moved from the lower speed position to the front position to effect the sub- speed change gear at higher speed, thereby making planting at the higher speed. Conversely, a gear change can be made from the planting at the higher speed to the lower speed.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to an operating device for a seedling transplanter.

(Prior Art and Problems to be Solved by the Invention) In order to maintain a constant seedling planting depth, a seedling transplanter has a relative position between an axle and a seedling planting device having a float that slides on the soil surface. The height is controlled by a hydraulic lifting device. In addition, there is a planting clutch for turning on and off the transmission of the seedling planting device, and in order to simplify these operations during seedling planting work, a single operating lever can be used to control the planting clutch, the lifting device, By linking the operation with the travel gear, the planting clutch is disengaged when the lifting device is in the raised or fixed position, and the planting clutch is engaged when the lifting device is lowered, and the seedling planting device is lowered to plant seedlings. The structure is such that work can be carried out.

Conventionally, such control levers were located on the side of the cockpit and were operated manually from the cockpit. Since these devices are operated simultaneously and in conjunction with each other, a considerable amount of operating load is required, the number of operating steps is large, and erroneous operations are likely to occur.

This invention facilitates the interlocking operation of such operation levers.
This will speed up the process.

(Means for Solving the Problems) The present invention includes a sub-transmission device that changes the traveling speed between high and low speeds with a single operation lever, a planting clutch that turns on/off the transmission of the seedling planting device, and a seedling planting device. A single control lever is provided in front of the cockpit, with the low speed position of the auxiliary transmission being rearward and the high speed position being forward. This is the configuration of the operating device for the seedling transplanter.

(Function) When planting seedlings, hold the control lever while extending your hand forward from the cockpit, and operate the control lever from the rear low-speed position to the front high-speed position to raise the While lowering the seedling planting device in the planting clutch disengagement position, the running latch is turned on, and the planting clutch is turned on to perform seedling planting at a low speed of the sub-transmission device. Furthermore, by moving the control lever forward from this low-speed planting position, the auxiliary transmission is set to high speed,
Carry out high-speed planting. In addition, by reversing this operation, it is possible to change the speed from a high speed for planting to a low speed for planting.

(Effect of the invention) In this way, a single control lever controls the auxiliary speed change of the seedling planting travel speed, the planting clutch, and the lifting device under certain interlocking operations. In addition,
At the rear of this operation, the auxiliary shift is set to low speed for planting, and at the front, the auxiliary shift is set to high speed for planting, so in the operation from high speed for planting to low speed for planting, by pulling toward the front of the cockpit,
You can quickly decelerate the machine, and conversely, when changing from low planting speed to high planting speed, the handle of the operating lever is extended, so it is easy to pay attention and avoid accidentally operating the machine to high planting speed. This reduces the number of problems and allows for easier and more accurate gear shifting and switching operations.

(Example) In the case of turning, the seedling planting machine has a seedling planting device 2 connected to the rear of a tractor body 1 so as to be able to rise and fall freely, and the body 1 has a front axle 4 that can be freely steered by a steering handle 3;
The vehicle has rear wheels 5 and is driven by four-wheel drive driven by an engine 7 located below the driver's seat 6. A transmission device 10 for transmitting power from the engine 7 to the front axle 4, rear wheels 5, and a power take-off shaft 9 that interlocks the seedling planting device 2 is provided at the bottom of the handle post 8 of the steering handle 3,
Seedling planting work can be performed using an operating lever 12 that is operated in the front-rear direction along the outside of the lever guide 11 on the upper side of the handle post 8.

The seedling planting device 2 is a seedling tank that stores seedlings in the seedling planting machine body 13]
4. It is composed of a planting device 15 that separates and transplants the seedlings delivered from the seedling tank 14, and a float 16 that slides on the soil surface while supporting the seedling planting device 13. , is connected to the rear end of the elevating link 17 consisting of a parallel link mechanism at the rear of the vehicle body 1, and connects the elevating link 17 to the vehicle body 1.
It is configured to be raised and lowered by control by a hydraulic circuit of a lifting cylinder 18 provided between the

The elevating cylinder 18, the elevating link 17, the elevating control valve of the hydraulic circuit, and the like constitute an elevating device 19.

Further, this elevation control valve is linked with the vertical movement of the float 16, and when the soil tiller becomes deep and the float 16 is moved upward, the raising/lowering device 19 raises the seedling planting M2, and vice versa. When the depth becomes shallow and the float 16 is moved down, the seedling planting device 2 is lowered, the sliding pressure by the float 16 is made constant, and pitching control is performed to maintain the seedling planting depth constant.

The transmission device 10 includes a drive shaft 20 that is transmitted from the engine 7.
A transmission shaft 24 is interlocked with the counter shaft 21 by a belt 23 that rotates and transmits transmission by applying tension with a tension pulley 22 to enable transmission to be turned on and off, and protrudes from a transmission case housing the counter shaft 21 and the main speed change transmission device. Between,
Belts 25, 26 are stretched across two stages, one for high speeds and one for low speeds, and each belt 25, 26 is tensioned by tension pulleys 27, 28 to form an auxiliary transmission that can change speed by turning on/off transmission. The pulley diameters of the transmission shaft 24 are set to be different for the high speed pulley 29 and the low speed pulley 30.

The transmission shaft 24, whose speed is changed in this way, transmits power to the front axle 4 and rear wheels 5 via the main transmission, and also to the power extraction shaft 9 via the planting clutch, and changes the traveling speed and seedlings through the sub-transmission. The structure is such that transmission is performed at a high speed for planting and a low speed for planting in synchronization with the planting speed.

An operating cam mechanism 31 for operating the tension pulleys 27, 28, etc. is provided above the transmission shaft 24, and is configured to be interlocked with the operating lever 12 for switching operations. A cam shaft 32 and an arm shaft 33 running in the same direction as the transmission shaft 24
．． 34 is arranged at a triangular point of an approximately equilateral triangle, and the cam shaft 32
The lift cylinder 1 is connected to the lift control valve of the hydraulic circuit on the top.
8, the high-speed cam B that interlocks the high-speed tension pulley 27, the low-speed cam C1 that interlocks the low-speed tension pulley 28, and the planting clutch of the power take-up high shaft 9 are interlocked to create a seedling planting bag. [Integrate the planting cam D etc. that turns on and off the power transmission in step 2.

These cams A are provided rotatably around this cam shaft 32.
-D and the lever arm 36 at the base of the operating lever 12 are connected by a link 37, and by rotating the operating lever 12 back and forth around the lever shaft 38, each cam A -D can be rotated around the camshaft 32.

Further, the arm shaft 33 is rotatably provided with a high-speed arm 39 that slides on the high-speed cam B, and a planting arm 40 that slides on the planting cam D. A lifting arm 41° that comes into sliding contact with the low speed cam C and a low speed arm 42 that comes into sliding contact with the low speed cam C are rotatably provided, and each of these arms 39 to 42
A roller is provided at the sliding contact portion with the cams A to D.

Of these, the lift arm 41 and the lift control valve are connected by a wire 43. The high-speed arm 39 includes a rod 44,
and a tension arm 46 via a spring 45. The low speed arm 42 includes a rod 47 and a spring 48.
It is connected to the tension arm 49 via. or,
The planting arm 40 connects the wire 50 to the clutch clutch of the planting clutch.

The operating lever 12 is guided by the lever guide 11 in the longitudinal direction, and as shown in FIG. ``Low speed'': ``Cut'': ``Rise j,'' (2) The relationship for the ``Fixed'' position is ``Low speed'': ``Cut'': ``Fixed'', and (3) The relationship for the ``R lower'' position is `` "Low speed": "Cut"
: "Descent", (4) "Low speed for planting" position:
"Enter": "descend", (5) "High speed planting" position relationship: "High speed":
"Enter": "descend", and also.

(6) The relationship for the "high speed" position is "high speed": "off": "descending".

In addition, these (1) to (6) are set in the order from the rear side to the front side, and the relationship timing between each sub-transmission device, planting clutch, and lifting device is set.

The operating direction of this operating lever 12 is set to the "up" (1) position on the rear side in the longitudinal direction, and the "high speed" (1) position on the front side.
6) The position of the operating lever 12 is outside the lever guide 11, and the grip part protrudes outward from the steering handle 3, but as mentioned above, the operating stroke is in the front-rear direction. Even if there are multiple stages along the rear side,
(1) Since the position operation is for a short time during operation, it is unlikely to be a hindrance to the operator.

The ``high-speed planting'' (5) and ``high-speed'' (6) positions are difficult to reach while seated in the pilot's seat 6, and can be switched by leaning your upper body forward or standing up. Since you will be performing many operations, you will naturally need to be careful when performing these operations. This operation is also easy to perform because the grip portion of the operating lever 12 is located outside the steering handle 3. Reference numeral 54 denotes a throttle lever, which can be moved back and forth along the inside of the operating lever 12.

51 is the operating lever 12 on the side of the handlebar post 8.
The main shift lever is provided at a position opposite to the main shift lever, and is configured to be operated to move forward and backward along the outside of the lever guide 53 in the same manner as the operating lever 12.

Interlocks the operation of the main transmission. A check valve mechanism in the hydraulic circuit of the elevation control valve is connected to the main shift lever 51 by a wire 52, and by operating the main shift lever 51 to the neutral position N, the check valve mechanism operates via the wire 52. The hydraulic circuit is in a logic state so that the raising and lowering position of the seedling planting device 12 by the raising and lowering cylinder 18 can be fixed. Therefore, when the seedling planting device w2 is to be in a state where transmission is possible with the traveling stopped, the main gear shift lever 51 is operated to the neutral position, and the operating lever 12 is set to the "low planting speed J (4)" or " All you have to do is move it to the "Planting High Speed" (5) position. The main shift lever 51 is configured to be operated from the neutral position N to the rear side to the forward speed F1 and reverse speed B positions, and to the front side to the forward second speed F2 position.

For power transmission, the main clutch is engaged with the belt 23 tensioned by the 6-tension pulley 22, in which the drive shaft 20 is rotated by the drive of the engine 7, and the tension pulley 27
When the belt 25 is tensioned by the belt 25 or the belt 26 is tensioned by the tension pulley 28 and the transmission shaft 24 is transmitted and rotated from the counter shaft 21, the front axle 4 passes through the main transmission.
, and rear axle 5 are transmitted, and power is also transmitted via the planting clutch to the power extraction shaft 9, the lateral movement of the seedling tank 14 of the seedling planting N2, the seedling feeding device, the planting device 15, etc., and the floating while traveling. While sliding the planting device 16 on the ground, the planting device 15 performs a seedling planting action on the leveled soil surface.

41 operation lever 12, use this operation lever 1.
2 at the rear end of the lever guide 11 (1
), as shown in FIGS. 3 to 5 and 7, the low speed arm 42 is rotated by the low speed cam C, tensioning the pulley 28 to the belt 26, and rotating the low speed pulley 30 to achieve low speed. The transmission is transmitted, the traveling speed is reduced to a low speed, the planting arm is rotated by the planting cam D, the planting clutch is disengaged via the wire 50, and the seedling planting action is stopped. Depending on the situation, the lift arm 41 is rotated and the lift control valve is switched to the raised position via the wire 43.
The seedling planting device 2 is raised by the lifting cylinder 18 to the height of the non-working position. Therefore, the vehicle body 1 is in a state where it only travels at low speed.

When the control lever 12 is operated to the "fixed" (2) position, the lift control valve by the lift arm 41 is switched from the lift position to the neutral position in the same manner as described above, and the seedling planting device immediately before this switch is made. 2 height (for example, the above "raise")
If the position is (1), the seedling planting device 2 is maintained in the non-working position (raised position), and the seedling planting device 2 is not lowered or raised any further.

Such a state is operated when only running is performed without performing pitching control or rolling control using the float 16 of the seedling planting device.

When operated to the "lower" position (3), the seedling planting device 2 is lowered from the raised position in the same way by the raising/lowering control valve. When the float 16 is brought into contact with the soil surface, seedlings can be planted.

"Low speed for planting" When the operation is performed in the position (4), the planting clutch by the planting cam D is similarly engaged to perform seedling planting work.

In addition, when set to the "high speed planting" position (5), the tension pulley 27 is tensioned by the belt 25, and the high speed pulley 29
The traveling speed is changed to a high speed position by the rotation of
At the same time, tension pulley 28 separates from belt 26.

High-speed driving and high-speed seedling planting will be carried out.

Moreover, when it is set to the "high speed" (6) position, the planting clutch by the planting cam D is interlocked with the disengagement, and the seedling planting operation is not performed and the seedling planting device is lowered and runs at high speed.

Note that if the operating lever 12 is operated backward from the "high speed" (6) position, the operation interlocking is performed in the reverse order (6)→(1) of the above (1)→(6).

In addition, in "Fixed" (2), the lever guide 1 for rotation has a fixing mechanism that can move and lock the operating lever 12 laterally so as to lock the operating lever 12 from moving forward and backward. A groove may also be formed.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Figure 1 is a side view of the seedling transplanter, Figure 2 is a front view of the section viewed from the arrow ■ in Figure 1, and Figure 3 is a side view of the seedling transplanter.
The figure is a slope view of the part shown by the ■ arrow in Figure 2, and Figures 4 and 5 are the 3
A perspective view showing a part of the operation interlocking mechanism in the figure.
7 is a side view showing the action of the section shown by the ■ arrow in FIG. 6, FIG. 8 is a side view showing the action of the section shown by the ■ arrow in FIG. The figure is an operation interlock table showing the interlocking relationship of each part of the operation lever, and FIG. 10 is a partially enlarged plan view. (Explanation of symbols) 2 Seedling planting device 12 Operation lever 9 26 8 1 Lifting device belt tension pulley operation cam mechanism 5 Belt 7 Tension pulley

Claims (1)

[Claims] A single operation lever is used to operate in conjunction with a sub-transmission device that changes the traveling speed between high and low speeds, a planting clutch that turns on and off the transmission of the seedling planting device, and a lifting device that raises and lowers the seedling planting device using hydraulic pressure. An operating device for a seedling planting machine, in which one operating lever is provided in a position in front of a driver's seat with the operating direction such that the low speed position of the auxiliary transmission is at the rear and the high speed position is at the front.