JPH025694Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is such that the float is attached to a seedling planting device so as to be able to swing up and down about the horizontal axis on the rear end side and biased downward, and the float 10 is attached to a seedling planting device. The present invention relates to a device for lifting and lowering a seedling planting device for a rice transplanter, which is provided with a control mechanism that automatically lifts and lowers the seedling planting device with respect to a vehicle body so as to maintain the vertical swing position of the device within a set range.

According to the above device for raising and lowering the seedling planting device, the planting depth can be adjusted by automatically raising and lowering the seedling planting device while detecting the height of the seedling planting device relative to the mud by vertically swinging the float. However, in cases where there are large irregularities on the mud surface or large unevenness on the hard surface on which the vehicle touches the ground, the control mechanism that performs the above automatic elevation may be delayed. As a result, the planting depth may become extremely shallow, causing floating seedlings, or the planting depth may become extremely deep, which may impede the growth of seedlings. In such a case, it is necessary to quickly take measures such as reducing the moving speed of the vehicle to a sufficiently low speed or changing the planting depth to a shallower or deeper one. There is a risk that the operator who performs the above operations may continue to perform inappropriate planting work over a wide area without noticing the above-mentioned inconvenient condition.

The present invention was developed in view of the above-mentioned circumstances, and its purpose is to quickly notify the operator that the planting depth is far outside the appropriate range. It is.

The present invention provides the aforementioned device for raising and lowering the seedling planting device of the rice transplanter, which is equipped with a device for detecting when the vertical position of the rear end portion of the float relative to the mud surface is out of an appropriate range. It is characterized by being provided with an alarm mechanism that activates an alarm based on the information.

In other words, we focused on the rear end portion of the float, where the vertical position of the soil surface is maintained constant under normal conditions by controlling the raising and lowering of the seedling planting device based on the vertical swing of the float. However, it is possible to quickly and reliably detect that the planting depth has become extremely shallow or deep by installing a device that detects when the vertical position of the soil surface is out of the appropriate range. and activating an alarm mechanism based on information from the detection device,
Since it is possible to notify the operator that the planting depth is significantly outside the appropriate range, measures are taken to ensure that the planting depth is maintained within the appropriate range. This makes it possible to quickly carry out planting work, thereby avoiding the above-mentioned inconvenience of improper planting work being carried out over a wide area, and making it possible to carry out even better planting work. Summer.

Next, embodiments of the present invention will be described based on the drawings.

As shown in FIGS. 1 and 2, left and right front wheels 1,
1. A tilted seedling stand 5 that is moved laterally in a constant stroke at the rear of the vehicle body equipped with left and right rear wheels 2, 2, an engine 3, a driver's seat 4, etc., and a pine-shaped seedling placed on this seedling stand 5. A seedling planting device 7 is provided which is equipped with five planting claws 6, etc. which take out seedlings one by one and plant them in the field while circulating up and down along the lower end row, and the machine advances. The structure is designed to allow seedlings to be planted in sequence.

The seedling planting device 7 is connected to the vehicle body via a quadruple link mechanism 8 so as to be movable up and down in a parallel position, and a hydraulic cylinder 9 is provided for raising and lowering the link mechanism 8 with respect to the vehicle body, Also,
The seedling planting device 7 is configured to be able to be raised and lowered relative to the vehicle body by extending and contracting the hydraulic cylinder 9.

As shown in Figures 2 and 3, three floats 10, 10A, 10A level the field for planting seedlings.
The rear end side portion is aligned with the horizontal axis X with respect to the seedling planting device 7.
The front end of the float is operatively connected to the seedling planting device 7 via a bendable and extensible link mechanism 11. A spring 1 that biases the link mechanism 11 toward the center float 10 among the three floats 10 toward extension and elastically biases the float 10 toward descent.
2, and the swing operation arm 14 of the control valve 13 for switching the operating state of the hydraulic cylinder 9 is interlocked with the link mechanism 11 by a release wire 15, so that the float 10 swings against the seedling planting device. When the position is within the appropriate range, the control valve 13 is brought into a lifting stop state where the operation of the hydraulic cylinder 9 is stopped, and when the lifting is out of the appropriate range, the control valve 13 is activated to extend the hydraulic cylinder 9 and the seedlings are removed. When the seedling planting device 7 is in a state where it is raised, and furthermore, when it falls out of the proper range, the control valve 13 is automatically switched to a state where the hydraulic cylinder 9 is shortened and the seedling planting device 7 is lowered. Therefore, the swinging position of the float 10 relative to the seedling planting device is automatically maintained within a set range to maintain a constant planting depth.

In short, the seedling planting device 7 is automatically moved up and down while the height of the seedling planting device relative to the mud is detected based on the vertical movement of the float 10 to maintain a constant planting depth. .

Spring 1 that biases the float 10 downward
2 is interlocked and connected via a release wire 18 to a swinging lever 17 that can be locked and held in a locking frame 16 at a desired swinging position, and then, by operating the swinging lever 17, the The structure is such that the downward urging force of the float 10 can be changed and adjusted. In other words, depending on the hardness of the mud in the field to be planted, the harder the mud, the greater the biasing force is adjusted, thereby making it possible to maintain the grounding state of the float 10 against the mud in a desired state.

Reference numeral 19 in the figure is a manual lift lever that locks and swings the spool of the control valve 13, which is biased by the float 10 in the direction of the downward operation, with the locking arm 20 in the direction of the upward movement. , a raised position U, a raised/lowered stop position N, a lowered position D, and a position A in which the control valve 13 is made freely operable and automatically operated by the float 10 as described above.

The first arm 21 that supports the rear end portions of the three floats 10, 10A, and 10A is attached to the horizontal rotating shaft 12A of the support in the seedling planting device 7, and the bending/extending link mechanism 11 relative to the central float 10 is lowered. A second arm 22 that supports the biasing spring 12 and the outer wire ends of the release wires 15 and 18 is pivotally supported on the seedling planting device 7 so as to be able to swing vertically. A link mechanism 23 is provided which interlocks and connects the horizontal axis 12A to move up and down by approximately the same amount in the same direction, and furthermore, a swing lever 24 that rotates the horizontal shaft 12A is engaged by a locking frame 25 at a plurality of positions in the swing direction. a set range of the vertical position of the float 10 for the seedling planting device;
In other words, the structure is such that the planting depth can be changed and adjusted.

As shown in FIGS. 2 to 4, three electrical resistance wires 26a, 26b with different downward protruding lengths,
26c is attached to the support frame 27 attached to the rear end portion of the float 10. When the vertical position of the rear end portion of the float 10 relative to the mud surface deviates upward or downward from the appropriate range, the three resistance wires 26a... Attach so that only the longest one 26a of the resistance wires 26a plunges into the mud, or all three resistance wires 26a penetrate the mud, and the current flows through the three resistance wires 26a into the mud. An ammeter-side circuit 28 is provided for detecting the displacement of When the height of the rear end of the float relative to the mud is out of the appropriate range, the float is operated in such a way that the resistance line is activated. 26a... is detected by a change in the number of plungers 26a into the mud, and the operator is notified by lighting a lamp 30.

In short, the operator is notified that the planting depth is out of the appropriate range, and the operator can slow down the vehicle speed, adjust the planting depth, or use the float 10
It is designed so that measures such as adjusting the downward biasing force can be quickly performed.

In carrying out the present invention, the resistance wires 26a, 26b, 26c are used as a device for detecting that the vertical position of the rear end portion of the float relative to the mud surface is out of the appropriate range.
In addition to the configuration, for example, an auxiliary float that floats on the mud surface independently of the seedling planting device 7 is provided, and the relative vertical position of the auxiliary float and the float 10 is detected. are applicable. In addition, the detection device 26a... is connected to the float 1
The vertical position of the float 10A located on the lateral side of the float 10 may be detected as the vertical position of the float 10.

Moreover, as an alarm mechanism, in addition to the alarm lamp 30,
Various things such as alarm buzzers can be used.

In addition, as a lifting control mechanism, for example, the float 1
The specific configuration can be changed in various ways, such as detecting the vertical swing position of 0 with an electric sensor and electromagnetically operating the elevation control valve 13.

[Brief explanation of the drawing]

FIG. 1 is a side view of the riding rice transplanter, FIG. 2 is a schematic plan view of the seedling planting device, FIG. 3 is a schematic diagram of the lifting/lowering operation device, and FIG. 4 is a schematic diagram of the alarm device. 7... Seedling planting device, 10... Float, 16
a, 16b, 16c...detection device, 30...alarm mechanism.

Claims (1)

[Scope of utility model registration request] The seedling planting device 7 is installed by making the float 10 swingable up and down about the horizontal axis X on the rear end side and biased downward.
A rice transplanter equipped with a control mechanism that automatically raises and lowers the seedling planting device 7 with respect to the vehicle body so as to maintain the vertical swing position of the float 10 relative to the seedling planting device within a set range. The device is a lifting and lowering operation device for a seedling planting device, and includes devices 16a, 16b, and 16c for detecting that the vertical position of the rear end side portion of the float 10 relative to the mud surface is out of an appropriate range. , 16c is provided with an alarm mechanism 30 that activates an alarm based on the information of the rice transplanter.