JPS5814820Y2 - rice transplanter - Google Patents

Description

[Detailed Description of the Invention] The present invention mainly relates to a three-wheeled riding rice transplanter having two pairs of front wheels and one rear wheel.

Specifically, the present invention relates to a rice transplanter in which a seedling planting section is supported by the machine body so as to be movable up and down, and the seedling planting section is raised and lowered by a lifting device.

Conventionally, in a rice transplanter, as disclosed in Japanese Utility Model Application Publication No. 51-122016, a lifting device is provided in the machine body to raise and lower the seedling planting section, and the lifting device is equipped with a clutch that cuts off power to the planting claw when the seedling planting section is raised. It has been proposed that these are interlocked and connected.

However, in this rice transplanter, the lifting device and the clutch are always linked and connected, so the clutch always operates in conjunction with the raising and lowering of the seedling planting section. If the seedling planting section is not able to be shut off, testing the raising and lowering of the seedling planting section or maintenance and inspection work on the seedling planting section with the seedling planting section raised is extremely dangerous. Furthermore, when observing the operating state of the seedling planting section, there was a drawback that sufficient observation could not be made because the seedling planting section could not be raised.

Therefore, the present invention was devised to solve these problems, and it is possible to simplify the operation during rice transplanting work, make it easier and easier to operate, and make turns at the edge of the field without malfunction, while also making it possible to control the seedlings. The clutch that cuts off the power to the planting claw when the planting part is raised is provided with an operating lever that cuts off the clutch regardless of whether the clutch is linked to the lifting device or released from the lifting device, and with an extremely simple configuration, By operating the lever, the clutch can be disengaged regardless of the interlocking state or disengagement state, and safety can be ensured during lift tests and maintenance inspections of the seedling planting section, and it is also possible to observe the operating state of the seedling planting section. It is also an object of the present invention to provide a rice transplanter suitable for quickly stopping operation of a seedling planting section during rice planting work.

Hereinafter, the true flow mode of the present invention will be explained based on illustrative drawings.

The aircraft body, which is generally indicated by number 1 in the figure, includes a rectangular frame-shaped front frame 2, a frame-shaped rear frame 3 integrally connected to the frame 2, and an upper surface of this front frame 2. bearings 6, 6 are fixed to the lower surfaces of both sides of the front frame 2 of this fuselage 1 via mounting plates 5.
A transmission case 7 in which a transmission mechanism (not shown) is installed is fixedly supported at approximately the center of the front frame 2 so that its front end is low and its rear end is high. Near both ends of the axle 80 supported by the shaft are supported by the two bearings 5, 5, front wheels 9, 9 are attached to both ends of the axle 80, respectively, and this axle 8 is connected to the rear end of the transmission case 7. The input shaft 10 mounted on the transmission case 7 is interlocked and connected to the input shaft 10 via the transmission mechanism in the transmission case 7, and the prime mover 1 is mounted on the rear frame 3 at a rearward and upper position from the transmission case 7.
1, and a belt 15 is stretched diagonally between a pulley 13 fixed to the rotating shaft 12 of the prime mover 110 and a pulley 14 with a built-in clutch fixed to the input shaft 1.0, and the front wheels 9, 9 is configured to be driven by power from the prime mover 11.

Further, the rear frame 3 is inclined so as to become higher toward the rear end, and a cylindrical shaft 16 extending in the vertical direction is provided at the upper rear end of the rear frame 3.
A support shaft 19 extending vertically from a support frame 18 that fixedly supports one rear wheel 17 is provided in series, and the support shaft 19 is inserted and supported within the cylindrical shaft 16 to support the rear wheel 17. 1
The steering shaft 21 is supported upright from a steering car box 20 placed and fixed near the front end of the front frame 2, and the upper end of the shaft 21 is A steering wheel 22 is attached to the rear wheel 17, a swing arm 23 is supported by the gear box 20, and the rear wheel 17 is attached to the rear wheel 17.
are connected to the support frame 18 via a drag rod 24 passing through the lower surface of the step plate 4, and the rear wheels 17 are configured to turn when the steering wheel 220 is rotated.

In addition, the seedling planting section, which is generally indicated by number 25 in the figure, has a float 27 attached to the lower part of the main body casing 26 in which a drive device (not shown) is installed, and a plurality of seedlings can be planted on this main body casing 26. The nail 28 is supported, and the planted nail 2
8 is operatively connected to the drive device, a seedling platform 29 is placed on the main body casing 26 so as to be reciprocatable in the lateral direction of the body, and the seedling platform 29 is operatively connected to the drive device. This seedling planting section 25 is supported by the front part of the front frame 2 of the fuselage 1 via two lower links 30 and 31 so as to be able to rise and fall freely. The input shaft 32 of the drive device at 25 is connected to the PTO shaft 3 protruding from the transmission case 7 via a telescopic rod 33 and two universal joints 34 and 35, and the PTO shaft 3 It is interlocked and connected to the input shaft 10 via a clutch 37 equipped with an axial pressure lever 38 and a transmission mechanism within the transmission case 7 .

Further, in the figure, 39 generally indicates a lifting device for lifting and lowering the seedling planting section 25, and a hydraulic cylinder 40 is pivotally mounted to one side of the front frame 2 of the body 1 so as to be able to swing freely in the vertical direction. , two opposing arm rods 41 and 42 are pivotally attached to the front frame 2 near this hydraulic cylinder 40, and a pin 43 is installed between the two arm rods 41 and 42, and the hydraulic pressure is connected to the pin 43. Piston rod 44 of cylinder 40
Concatenate.

On the other hand, a lift shaft 45 extending in the lateral direction of the aircraft body is mounted on the front end of the front frame 2, and two lift arms 46, 46 are connected to the lift shaft 45, and the lower lift/lift 30.30 is suspended via links 47.47, and an arm rod 48 connected to one end of the lift shaft 45 is connected to the arm rod 41 via a link 49.

Further, a hydraulic pump 51 is fixed to a support plate 50 which is swingably and fixedly attached to the model of the prime mover 11, and a pulley 53 fixed to a drive shaft 52 of the pump 51 and a pulley 53 fixed to the drive shaft 52 of the pump 51,
A belt 55 is hung between a pulley 54 fixed to the rotary shaft 12 of the hydraulic pump 51 to drive the hydraulic pump 51, and the hydraulic cylinder 40 is connected to the hydraulic pump 51 by a switching valve (not shown). ), and supply pressure oil from a hydraulic pump 51 to the hydraulic cylinder 40 in order to drive the hydraulic cylinder 40 by operating this switching valve,
Alternatively, the tension of the belt 55 can be adjusted by swinging the support plate 50 configured to appropriately return the pressure oil in the hydraulic cylinder 40 to a tank;
It can also be used as a clutch by making this swing.

Therefore, the present invention connects the operating lever 38 to the arm rod 42 via an appropriate link or element 56 in order to switch the clutch 37 to the power cutoff side when the seedling planting section 25 is raised by the lifting device 39. This operating lever 38
A mechanism for releasing the interlocking state is provided between the connection between the lever 57 and the arm rod 42. For example, an interlock release lever 57 is pivotably pivoted to the fuselage 1, and a tension pulley 58 is attached to the tip of the lever 57. The element body 56 is tensioned or relaxed by the pulley 58, and the operating lever 38 is
While the clutch 37 is configured to be interlocked with and released from the arm rod 42, regardless of whether the clutch 37 is interlocked with the elevating device 39 or released from the interlocking state by the operation lever 38,
This is to force the clutch 37 to be disconnected.

The rice transplanter of the present invention is constructed as described above.
1 drives the pair of front wheels 9, 9 to run the aircraft 1, and when traveling on the road, the lifting device 3
9 to raise the seedling planting section 25, that is, by operating the switching valve, pressure oil from the hydraulic pump 51 is transferred to the hydraulic cylinder 40.
The piston rod 44 is advanced.

As a result, the lift shaft 45 rotates via the arm rod 41, link 49, and arm rod 48, swings the lift arms 46, 46 upward, and lifts the lower link 30.30 via the link 47.47. The seedling planting section 25 is raised.

When the machine body 1 is driven into a field to carry out rice planting work, the seedling planting section 25 is lowered, and the pressure oil in the hydraulic cylinder 40 is appropriately returned to the tank by operating the switching valve. The piston rod 44 is moved backward, and the seedling planting section 25 is lowered.

Therefore, when the machine body 1 reaches the edge of the field and is to be reversed during this rice planting work, the power transmission to the front wheels 9.9 is cut off, and the seedling planting section 25 is raised.
In addition, the steering wheel 22 is rotated while the power transmission to the drive device in the seedling planting section 25 is cut off, and the rear wheels 17 are turned to reverse the fuselage 10. Performing both at the same time requires an extremely high level of skill, and there is a risk of erroneous operation.

Therefore, in the present invention, the clutch 37 is previously interlocked with the lifting device 39 by operating the interlock release lever 57 before the machine body 1 enters the field.

As a result, the switching valve is operated as described above, and the lifting device 39 is
When the seedling planting section 25 is raised, the lifting device 39
The clutch 37 is switched to the power cutoff side in conjunction with
The clutch 37 is automatically switched to the power cutoff side by swinging the operating lever 38, and when the seedling planting section 25 is lowered, the clutch 3T returns to its original position. Power is automatically transmitted to the drive device in the seedling planting section 25.

Furthermore, in the present invention, the lifting device 39 of the clutch 37
Operation lever 3 regardless of the interlocking state and the interlocking release state.
8 allows the clutch 37 that connects the seedling planting section to the prime mover to be disconnected.

To be more specific, if the clutch 37 is kept interlocked with the lifting device 39 in advance, the clutch 37 will not be engaged even when the seedling planting section 25 is raised by the swinging operation of the operating lever 38. This allows power to be transmitted to the drive device in the seedling planting section 25 while maintaining the same state, and also allows the clutch 37 to be switched to the power cutoff side even when the seedling planting section 25 is lowered.

When the clutch 37 is kept in a disengaged state with respect to the lifting device 39, the operating lever 3
When the clutch 37 is kept in the engaged state by the rocking operation of 8, the clutch 37 can be brought into the disengaged state, and when the clutch 37 is kept in the disengaged state, the clutch 37 can be brought into the engaged state. .

Therefore, when performing a lifting test of the seedling planting section 25 or maintenance and inspection work of the seedling planting section 25 when the seedling planting section 25 is raised, it is possible to perform maintenance and inspection work on the seedling planting section 25 under safe conditions. When observing the operating state of the seedling planting section 25, it is possible to easily observe it with the seedling planting section 25 raised, and moreover, the seedling planting section 25 can be lowered while the clutch 37 is interlocked with the lifting device 39. When carrying out rice planting work, for example, when it becomes necessary to stop the operation of the seedling planting section 25 because a stone has fallen in the field, the operation lever is turned off without disengaging the clutch 37 from the lifting device 39. 3
By only operating step 8, the clutch 37 can be disconnected and the seedling planting section 25 can be immediately stopped, thereby preventing damage to the planting claws 28, etc. A hydraulic clutch 37a is used as the clutch 37 in the embodiment, and this hydraulic clutch 37a is connected to the hydraulic pump 5 for driving the lifting device 39.
1, and the hydraulic clutch 37a may be configured to be substantially interlocked with the lifting device 39.

That is, the hydraulic clutch 37a and the lifting device 39 are connected in communication with the hydraulic pump 51, and the control valve 5 is connected in the middle of the communication path.
9 is installed, and the hydraulic cylinder 4 is operated by operating the control valve 59.
When pressure oil is supplied to the tank 0 and the seedling planting section 25 is raised, the hydraulic clutch 37a is opened to the tank and the clutch 37
a to the power cutoff side, and when the control valve 59 is operated to open the hydraulic cylinder 40 to the tank and lower the seedling planting section 25, pressure oil is supplied to the hydraulic clutch 37a, and the clutch 37a is turned off. It is also possible to switch to the power transmission side and configure the hydraulic clutch 37a to be substantially interlocked with the lifting device 39.

As explained above, in the rice transplanter according to the present invention, the seedling planting section is supported on the machine body so as to be able to rise and fall freely, and the drive device in the seedling planting section is interlocked and connected to the prime mover mounted on the machine body via a clutch, and the rice transplanter according to the present invention In a rice transplanter equipped with a lifting device for raising and lowering a seedling planting section, the clutch is interlocked and connected to the lifting device in order to interrupt power transmission to the planting claws when the seedling planting section is raised, and this interlocking state is controlled. While the clutch is configured to be releasable, the clutch is provided with an operation lever that interrupts the clutch regardless of whether the clutch is interlocked with the lifting device or released from the lifting device, and a test for raising and lowering the seedling planting section is performed. While maintenance and inspection of the seedling planting section can be carried out under safe conditions with the seedling planting section raised, when observing the operational status of the seedling planting section, it is necessary to can be easily observed, and
When performing rice planting work by lowering the seedling planting section while the clutch is interlocked with the lifting device, for example, when it is necessary to stop the operation of the seedling planting section because a stone has fallen in the field, the clutch lifting device By simply operating the operating lever, the clutch can be disconnected and the seedling planting section can be stopped immediately, thereby preventing damage to the planting claws, etc., without disengaging the clutch.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a partially omitted side view, FIG. 2 is a partially omitted plan view, FIG. 3 is an explanatory side view of the main part, and FIG. 4 is a plan view thereof. FIG. 5 is a front view of the same portion, and FIG. 6 is a hydraulic circuit diagram showing another embodiment. 1... Aircraft, 11... Prime mover, 25.
...Seedling planting department, 37...Clutch, 38.
...Operation lever, 39... Lifting device.

Claims (1)

[Scope of utility model registration request] The seedling planting section is supported by the machine body so as to be freely raised and lowered, and the drive device in the seedling planting part is interlocked and connected to a prime mover mounted on the machine body via a clutch, and the machine body is provided with a lifting device for raising and lowering the seedling planting part. The clutch is interlocked and connected to the lifting device in order to cut off power transmission to the planting claws when the seedling planting section is raised, and this interlocking state can be released. A rice transplanter, characterized in that the rice transplanter is provided with an operating lever that disconnects the clutch regardless of whether the clutch is interlocked with the lifting device or disengaged.