JPS6143005B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field]

The present invention provides a rice transplanter equipped with a hydraulic lever that allows the machine body to be raised and lowered and automatically controlled in height, a travel clutch lever that engages and disconnects a travel clutch, and a planting clutch lever that similarly engages and disconnects a planting clutch. The present invention relates to an operating device, and in particular, to a device for towing so that the traveling or planting clutch does not engage when the machine is lowered using a hydraulic lever and operated to a seedling loading position where automatic height control is not possible.

[Conventional technology]

Conventionally, the operating position of the rice transplanter using the hydraulic lever is the seedling loading position, and when the hydraulic lever is operated to this seedling loading position, the machine descends to its lowest point and stabilizes at the lowest position without automatic height control. It is now possible to replenish seedlings accurately and easily.

[Problems to be solved by the invention]

However, in the seedling loading position of this hydraulic lever, no restraining means is provided for the traveling clutch or the planting clutch, and these clutches can be freely engaged. As a result, when the seedling feeder restarts planting, the user forgets to switch the hydraulic lever to the automatic height control position and immediately operates the drive or planting clutch lever. There were problems such as the plants crawling under the ground and forcing mud into them, burying the seedlings that had already been planted, making it impossible to plant them reliably, and putting an excessive load on the engine, causing it to stall.

[Means to solve the problem]

The present invention has been made in view of the above circumstances, and in the operation pattern of the hydraulic lever, when planting seedlings, the upward movement of the float is selected before the position where automatic height control is possible due to fluctuations in the ground pressure of the float. A seedling placement position where automatic height control is not possible is established by restricting the height of the seedlings, and a restraining means is activated by the selection action of the hydraulic lever when operating the seedling placement position to prevent the travel or planting clutch from engaging at this time. The clutch is configured so that the clutch will not engage unless the hydraulic lever is returned to the automatic height control position.This allows the clutch to be operated without accidentally switching the hydraulic lever when resuming planting after replenishing seedlings. To provide an operating device for a rice transplanter that eliminates problems caused by engaging a planting clutch.

【Example】

Hereinafter, one embodiment of the present invention will be specifically described with reference to the drawings. Fig. 1 shows an example in which it is applied to a walking rice transplanter, in which an engine 3 is mounted on an engine pedestal 2 at the front end of a machine body 1, and a chain case 5 is connected to a traveling transmission 4 behind it. The chain case 5 is mounted so as to be movable, and a traveling wheel 6 is mounted on a shaft at the free end of the chain case 5 to be driven. In addition, a moving rod 8 is provided in the rear planting transmission 7 so as to move in the left-right direction, and a seedling tank 10 in which seedlings are placed via a support arm 9 is attached to the moving rod 8 along the left and right sides. A planting body 11 is mounted so as to move back and forth in the direction, and is disposed opposite to a seedling outlet at the lower end of the seedling tank 10 so as to cut out seedlings one by one and plant them on the rice field. A handle 12 is provided behind the seedling tank 10 at the rear end of the machine, and a lever and a guide frame 13 are attached to the upper part of the handle 12, and a hydraulic lever 14, a planting clutch lever 15, and a traveling clutch lever 16 are installed here. It is set up. A selector float 17 and a side float 18 are provided on the underside of the fuselage 1 in order to slide on the surface and touch the ground.Both floats 17 and 18 are supported by a support 19 at the base of the rear handle 12, and the front end is attached to the fuselage side with an extendable link mechanism 20,
The front part can be moved up and down freely. Next, the operating devices for each lever will be explained with reference to FIGS. 2 to 4. The lever guide frame 13
Three regulating grooves 21 to 23 are bored in parallel to each other, and the levers 14 to 16 are fitted into these regulating grooves 21 to 23, respectively.
4 to 16 are provided with their lower ends rotatably pivotally connected to a horizontal shaft 24 fixed to the lever guide frame 13 so as to be rotatable in the front-rear direction. In addition, each lever 14 to 16 has a U-shaped metal fitting 14a with a fulcrum crossing mechanism at the bottom.
Wires 14b to 16b via wires 14b to 16a
The wire 15b on the planting clutch lever side is connected to the arm 25 from the clutch shifter of the planting transmission 7, as shown in FIG. By operating the arm 25 by operating the wire 15b to the front entry position or the rear cut position, power is applied to the implant 11 side and the implant is cut. As shown in FIG. 1, the wire 16b on the traveling clutch lever side is connected to a clutch 29 of a belt 28 wound between a pulley 26 on the output side of the engine 3 and a pulley 27 on the input side of the traveling transmission 4. By operating the running clutch lever 16 to the front engagement position of the regulating groove 23 or the rear disengagement position, the wire 16
Clutch 29 is engaged and disconnected by b. As shown in FIGS. 1 and 5, the hydraulic lever operating system includes a chain case 5 having the wheels 6 connected to the piston side of a hydraulic cylinder 30 via a balance rod 31, a rod 32, and an arm 33. This hydraulic cylinder 30 is hydraulically connected to a hydraulic pump 35 and a tank 36 via a switching valve 34, and by supplying oil to the hydraulic cylinder 30, the chain case 5 is lowered, the wheels 6 are lowered, and the fuselage 1 is lowered. By raising the vehicle and switching the switching valve 34 to the drain side, the machine body 1 is lowered by raising the wheels 6 while draining oil from the hydraulic cylinder 30 by the body's own weight. An operating plate 3 is located near the hydraulic pump 35.
7 is swingably mounted on a pin 38, and a switching valve 34 is connected to this operating plate 37 via a rod 39.
The arm 40 of the center float 17 is connected to the center float 17.
A connecting rod 41 from above is connected to switch the switching valve 34 via an actuating plate 37 or the like by the float ground pressure. Further, the actuating plate 37 has a long hole 42.
is bored, and the tip of the pin 43 is engaged therewith, and the pin 43 urges the spring 45 between it and the spring receiver 44, and is connected to the wire 14b on the hydraulic lever side. On the other hand, in the lever guide frame 13, as shown in FIG. 2, the front end of the regulating groove 21 of the hydraulic lever 14 is in the planting position, the middle part is in the fixed position, and the rear end is in the raised position. A stepped groove 46 is formed in front of the regulation groove 21 on the opposite side to the other regulation grooves 22 and 23, and a seedling placement position is provided there. As a result, when the hydraulic lever 14 is operated to the forwardmost seedling placement position, the wire 14b loosens and the spring 4
5, the pin 43 is pushed, and the actuating plate 37 becomes as shown by the solid line in FIG.
5. Drain both the hydraulic cylinders 30 and lower the aircraft 1. On the other hand, when the hydraulic lever 14 is operated to the rear end raised position, the wire 14b is pulled to the maximum extent, and the actuating plate 37 and arm 33 are pulled by the pin 43 as shown by the broken line in the figure, and the switching valve 34
Also, as shown by the broken line, the oil is supplied to the hydraulic cylinder 30, and the aircraft 1 is raised. Next, when the hydraulic lever 14 is set to the planting position with the hydraulic lever 14 slightly pulled back, the tip of the pin 43 is located between the long holes 42, and the switching valve 34 is moved together with the actuating plate 37 by the connecting rod 41 from the float side. This allows for automatic height control depending on the float ground pressure. Furthermore, when the hydraulic lever 14 is operated to the fixed position and the wire 14b is pulled a little forcefully, the actuating plate 37 and the switching valve 34 become as shown by the chain line in the figure, and the hydraulic cylinder 30 is maintained in a certain oiled state and the aircraft 1 is moved. Fix it in the predetermined raised position. In such a configuration, as shown in FIGS. 2 to 4, the levers 14 to 16 are
A restraining means 47 is provided near the lower part of.
This restraining means 47 includes a shaft 4 parallel to the horizontal shaft 24.
8, a shaft tube 49 is movably fitted with a spring 50 biased toward the lever 16, an interlocking arm 51 is attached to one end of this shaft tube 49, and a check arm 52 is attached to the other end. . Then, the interlocking arm 51 engages with the hydraulic lever 14 and moves to the right by the selection action when the hydraulic lever 14 is moved from the position between the grooves 21 and 46 to the groove 21 to the groove 46,
At this time, the restraint arm 52
It is arranged to be above the bottom of 6. Since the present invention is configured in this way, when the hydraulic lever 14 is operated by the regulation groove 21, the shaft tube 49 of the check means 47 is moved to the left by the spring 50 to move the check arm 52 toward the traveling clutch lever 16. It is retracted to the left side, so that the traveling clutch lever 16 can be freely operated together with the planting clutch lever 15. Therefore, when planting seedlings, the hydraulic lever 14 is operated to the planting position to enable automatic height control, the travel clutch lever 16 is operated to the on position, the wheels 6 are driven to drive the seedlings, and the planting clutch lever 15 to the inserted position and insert the implant 1.
1, the machine 1 is automatically controlled to always maintain the appropriate height for planting seedlings in response to changes in the depth of the tiller, and seedlings are planted on the topsoil leveled by the floats 17 and 18. They are being planted one after another. In addition, when leveling the topsoil surface that has been roughened by running wheels, such as near the ridges of the field or on headlands, the hydraulic lever 14 should be set to the planting position, and the driving clutch lever 1 should be leveled.
Float 1 is set by placing 6 in position and running it.
The ground is leveled in steps 7 and 18, and then the planting work is carried out as described above. When the number of remaining seedlings in the seedling tank 10 becomes low and it becomes necessary to replenish the seedlings, the traveling clutch lever 1
6 to the OFF position to stop the traveling, and at the same time, also operate the planting clutch lever 15 to the OFF position to remove the implant 11.
Planting will also be halted. In addition, the hydraulic lever 14
When the control groove 46 is selected from the regulation groove 21 to the seedling placement position, the switching valve 34 is switched, causing both the hydraulic pump 35 and the hydraulic cylinder 30 to drain, making automatic height control inoperable, and the machine 1 is placed at the highest position. The seedlings are lowered and held stationary so that the seedlings tank 10 can be replenished accurately. On the other hand, by such an operation of the hydraulic lever 14, the check arm 52 moves to the right together with the interlocking arm 51 against the spring 50, and the check arm 52 comes to be above the traveling clutch lever 16. Therefore, even if you try to insert the travel clutch lever 16 after replenishing the seedlings,
If the hydraulic lever 14 is returned to the planting position to enable automatic height control, the restraint on the travel clutch lever 16 by the restraint arm 52 is released, and the lever 16 is restrained by the restraint arm 52.
It is now possible to move the machine to the input position and start planting seedlings again. In addition, in the above embodiment, the traveling clutch lever 1
Although the planting clutch lever 15 or both levers 15 and 16 can be restrained together, the planting clutch lever 15 or both levers 15 and 16 may be restrained.

【Effect of the invention】

According to the present invention, the machine cannot travel or the clutch levers 15 and 16 for planting can be operated until the hydraulic lever 14 is returned to the planting position after seedling supply and the automatic height control is enabled. Therefore, problems caused by incorrect operation order are completely eliminated. In addition, since the restraining means 47 automatically performs the restraining operation or canceling the restraining operation in conjunction with the operation of the hydraulic lever 14, the operation does not become complicated. Further, by driving the vehicle by turning only the travel clutch lever 16 on while the floats 17 and 18 are in contact with the ground, it is possible to contact the rear of the wheels near a ridge or on a headland.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an embodiment in which the device according to the present invention is applied to a walk-behind rice transplanter, Fig. 2 is a plan view of the operating section, Fig. 3 is a sectional view of the same, and Fig. 4 is a perspective view of the main parts. FIG. 5 is a configuration diagram of the hydraulic lever operation system. 1... Airframe, 2... Engine pedestal, 3... Engine, 4... Traveling transmission, 5... Chain case, 6... Wheels, 7... Planted transmission, 8... Moving rod, 9 ... Support arm, 10 ... Seedling tank, 11
... Implant body, 12 ... Handle, 13 ... Lever guide frame, 14 ... Hydraulic lever, 15 ... Planting clutch lever, 16 ... Traveling clutch lever, 1
7, 18...Float, 19...Support, 20...
...Link mechanism, 21-23...Regulation groove, 24...
Horizontal axis, 25... arm, 26, 27... pulley,
28... Belt, 29... Clutch, 30... Hydraulic cylinder, 31... Balance rod, 32... Rod,
33...Arm, 34...Switching valve, 35...
Hydraulic pump, 36... tank, 37... operating plate,
38...Pin, 39...Rod, 40...Arm, 41...Connecting rod, 42...Elongated hole, 43...Pin, 44...Spring receiver, 45...Spring, 46...
Groove, 47... Checking means, 48... Shaft, 49... Shaft tube, 50... Spring, 51... Interlocking arm, 52...
...Restraint arm.

Claims (1)

[Claims] 1 The hydraulic lever switches and moves to the elevated position of the rice transplanter body, the fixed position at the appropriately elevated position, the automatic height control position that corresponds to fluctuations in ground pressure of the float during seedling planting, and the upward movement of the float. The seedling loading position is placed in the order of each seedling loading position where automatic height control is not possible, and when the hydraulic lever is switched to the seedling loading position, a restraining means linked thereto prevents the clutch from running or planting from being engaged. An operating device for a rice transplanter, characterized in that it is configured as follows.