JPS6018025Y2 - Planting clutch operating device in rice transplanter - Google Patents

Description

[Detailed description of the invention] The present invention is a rice transplanter in which a device for planting is provided so that it can be raised and lowered from the ground, and a control lever for a clutch is installed in the transmission system of the device. Conventionally, when the planting device is raised above the ground for turning, and the planting device is lowered from the ground when restarting the planting after turning, conventionally, the planting device is placed in the position of the predetermined planting on the mud surface. During the planting process, the clutch unexpectedly engages and activates before descending, causing loss of seedlings due to aerial planting and mistakes when planting at an angle. The device is equipped with a lift command lever, and there have been cases where the planting clutch was accidentally engaged and activated due to incorrect operation, but in particular, because the clutch operation lever is also used as the lift command lever, the clutch may be accidentally engaged. In many cases, it was impossible to avoid this.

) In view of the actual situation, the purpose of planting that can eliminate such inconveniences is to provide a clutch operating device.

For planting in the rice transplanter according to the present invention, a clutch operating device is installed between a clutch that is installed in the transmission system of the device and its operating lever, and a clutch operating device is used for planting which can be raised and lowered from the ground. When the lever is engaged in the clutch operation, the planting is performed by interposing a delay mechanism such that the clutch is engaged and operated after the elapse of the required time for raising and lowering the device over the maximum raising and lowering range, or a time close to it. It is characterized by

In other words, when the planter lowers the device to the ground, the delay mechanism is activated even if the planter accidentally operates the clutch operation lever due to malfunction or inevitably operates it to the clutch engagement side because it also serves as the elevation command lever. is activated and the planting device is able to check the activation of the clutch until it descends to the predetermined planting position on the mud surface, and after descending to the predetermined planting position. The planting operation can be started by controlling the engagement operation of the clutch.

In particular, in the case of a rice transplanter in which the touch control lever also serves as the lift command lever for planting, it is possible to reliably prevent seedling loss due to aerial planting and mistakes when planting at an angle, but it is possible to ensure that the specified planting is not done properly. After reaching the position, the clutch can be engaged and operated immediately and automatically without setting a time graph, making it easier and faster to operate the clutch for planting and for raising and lowering the planting device. Since safety and improvement in work efficiency are distantly related, they are of similar practical utility.

Hereinafter, embodiments of the present invention will be explained based on the drawings.
Figure 1 shows the overall side view of the rice transplanter. Planting is carried out at the rear of the rice transplanter 1 by a tractor or other mobile device 2 via the parallel four-link mechanism 3. The planting is connected so that it can be moved up and down depending on the position.

The planting device 2 has a transmission case 4, a seedling stand 5, a planting claw 6, etc., and a mud surface sliding ground float 7 for floating and supporting these on the mud surface.

Driving force is transmitted to the transmission case 4 via a transmission shaft 9 extending rearward from the mission case 8 of the machine 1.
While reciprocating the seedling tray 5 from side to side, the claws 6 are driven in a circular manner to draw an elliptical trajectory up and down for planting, and the seedlings on the seedling tray 5 are sequentially cut out and planted on the mud surface. I'm configuring it as I go.

Reference numeral 10 indicates an operating lever for operating the clutch 11, which is installed in the transmission system that transmits power from the transmission case 8 to the transmission case 4 via the shaft 9. It is fixed to 13,
The arm 14 fixed to this rotating shaft 13 and the clutch 1
It is connected to the first actuating arm 15 via a linking rod 16 with a turnbuckle 16a and a tension spring 17.

Reference numeral 18 denotes a hydraulic cylinder for swinging up and down the link mechanism 3, and is pivotally mounted at the rear of the machine 1.

A control valve 19 of a forward flow/reverse flow switching type for this hydraulic cylinder 18 is connected to the clutch operating lever 10 via a linkage mechanism A, and to the linkage mechanism 3 and the float 7. Linkage mechanism B, respectively.
It is linked via C.

The linkage mechanism A between the lever 10 and the valve 19 is the lever 10
An arm 20 is fixed to the middle of the rotating shaft 13, a rod 21 is connected to the arm 20, and a bell crank 22 is connected to the other end of the rod 21. Rod 2 connected from bell crank 22
3. An operating member 2 whose one end is engaged with the rod 23 via a spring 24 and which operates the valve 19.
It is commanding from 5th place.

The link mechanism B between the valve 19 and the link mechanism 3 includes a rod 26 connected to the other end of the actuating member 25, a bell crank 27 connected to the other end of the rod 26, and a bell crank 27 connected to the other end of the rod 26. The vertical link 3a is activated by a rod 28, etc., which is connected to the bell crank 27 and connected to the vertical link 3a of the link mechanism 3, and the vertical link 3a does not rise until the link mechanism 3 is raised above a certain height due to the extension of the cylinder 1B. It is configured to rise along with the upward movement of the member 29 that receives the extension action.

The linkage mechanism C between the valve 19 and the float 7 is configured as a plowing depth detection device, and this detection device C includes a rod 30 connected to the middle of the actuating member 25 and an arm connected to the rod 30. 31, a release wire 32 extending from the arm 31, a bell crank 3 connected to the other end of the wire 32;
3. When the float 7 is raised relative to the main body of the device 2, it is composed of a rod 34 that thrusts up and swings the bell crank 33, a spring 35 that biases the bell crank 32 into a tensile state, and the like.

Therefore, the planting clutch 11, as shown in FIG. 3,
The movable clutch piece 36 and the fixed clutch piece 37 are oiled, and the fixed cylindrical part 3 is attached to the fixed clutch piece 37.
An oil pushing body 40 that slides in an oil-tight state against an oil sump 39 formed inside the movable clutch piece 36 is connected to the movable clutch piece 36, and acts as a throttle valve on the cylindrical part 38 of the fixed clutch piece 37. A very small diameter hole 41 and a hole 42 for oil inflow are formed, and a check valve 43 for preventing oil outflow is attached to the oil inflow hole 42 of the parenthesis, thereby forming a delay mechanism for the clutch 11 engagement operation. .

After lowering the planting device 2 to the planting position by moving the lever 10 from the lower operating position (Dn) to the clutch disengaged position (OFF) to the clutch engaged position (ON), the tiller is As the float 7 sinks or rises from the mud surface in response to changes in depth, the valve 1 is activated via the linkage mechanism C.
9 to a forward or reverse flow state, the cylinder 18 is expanded or contracted, and the planting device 2 is raised or lowered so that its float 7 rises or falls by an amount commensurate with the amount of sinking or floating, and At this time, the valve 19 is returned to neutral,
As a result, the proper planting posture is automatically maintained at all times.

Of course, in this case, the clutch 11 is in the engaged state and the planting device 2 is in operation.

Further, since the spring for biasing the clutch 11 is in a free state, the valve 19 and the lever 10 are disconnected from each other.

When the lever 10 is moved to the up position (Up), the valve 19 is switched to the normal flow state via the linkage mechanism A, the cylinder 18 is extended, the linkage mechanism 3 is swung upward, and the planting is performed by the device 2. The entire body is raised and non-planted plants are moved to a posture.

Further, when the planting device 2 rises to a predetermined position, the valve 19 is automatically returned to the neutral position via the linkage mechanism B, and the raising of the planting device 2 is stopped.

When the lever 10 is operated to the raised operation position (Up), the planting device 2 is raised by the extension of the cylinder 18 as described above, and the movable clutch piece 36 is separated from the fixed clutch piece 37 by the rod 16 and the spring 17. At this time, the check valve 43 opens to allow sufficient inflow of the oil through the hole 42, so that the clutch 11 is immediately disengaged.

When the aircraft rotation is completed and the lever 10 is operated to the lowering operation position (Dn) in order to lower the planting device 2 to the planting attitude in order to resume planting, the cylinder 1 is moved as described above.
After 8 contractions, the planting device 2 is lowered.

However, the clutch 11 is not immediately engaged and activated due to the delay mechanism.

That is, since the oil pushing body 40 presses the oil in the oil sump 39, the check valve 43 is closed, and therefore, the oil only flows out from the extremely small diameter hole 41 at a small flow velocity, and the movement of the movable clutch 36 is prevented. It can only be done gradually.

In this way, there is a time lag between the clutch 11 engagement and planting of the operating lever 10 from the time when the device 2 is lowered to the time when the clutch 11 is actually engaged. The required lifting and lowering time or a time close to that (because the planting device 2 is not always raised to its maximum raised position when turning,
If the setting is set to 1 (as it may be raised and stopped at a slightly lower position), the clutch 11 will engage only when the planting device 2 has descended to the specified planting position relative to the mud surface.
Planting will resume.

In addition to the structure shown in FIG. 3, the delay mechanism may be constructed by interposing a hydraulic dashpot on the rod 16.

In addition, the lever 10 is not limited to a dual-purpose type that controls the turning on and off of the clutch 11 for planting and the raising and lowering of the planting device 2, but the present invention can be applied to levers provided with separate levers for each. Also good.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the clutch operation device for planting in the rice transplanter according to the present invention, FIG. 1 is an overall side view of the rice transplanter, FIG. 2 is a perspective view showing the operating force transmission system, and FIG. 3 is an enlarged sectional view of the main part. 2... Planting device, 10... Operating lever, 11... Clutch, 16... Rod, 37... Clutch piece, D... Delay mechanism.

Claims (1)

[Claims for Utility Model Registration] ■ The planting that can be raised and lowered from the ground is carried out between the clutch 11 installed in the transmission system to the device 2 and its operating lever 10, and the planting is carried out when the device 2 is raised and lowered from the ground. When the lever 10 is engaged in the clutch operation, the planting is performed using a delay mechanism such that the clutch 11 is engaged and operated after the elapse of the required time for raising and lowering the device 2 over the maximum raising and lowering range, or a time close to it. The rice transplanter is characterized by a clutch operation device. ■ The delay mechanism is the clutch piece 3 of the clutch 11.
7. A clutch operating device for planting in a rice transplanter according to claim 2, which is incorporated in the actuating part of claim 7. ■ The delay mechanism is a rod 1 connected to the lever 10.
6. The rice transplanter according to claim 2, which is a hydraulic dashpot installed in the rice transplanter, is a clutch operating device. (2) The operation lever 10 also serves as a lift command lever for the planting device 2. Utility Model Registration A clutch operation device for planting in the rice transplanter according to any one of claims (2) to (3) .