JPH0433711Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a fertilizer outflow prevention device in a working machine such as a rice transplanter or a seeding machine equipped with a fertilization device.

Conventionally, a work machine equipped with a fertilization nozzle is attached to the running machine, and the fertilizer in the fertilizer tank attached to the running machine is pumped through a hose to the fertilizer nozzle using a fertilizer pump, and fertilizer is applied in parallel with the planting machine. A working machine with a fertilization device is provided.

In such a working machine with a fertilizing device, even if the pump and working machine are stopped when work is completed or when the machine is turned around in the field, the fertilizer remaining in the fertilizing nozzle or hose may be left on the road or in the field. Since the fertilizer drips onto the ground, etc., a device to prevent fertilizer from flowing out is installed in the piping from the pump to the fertilizing nozzle, and the device is configured to be operated in conjunction with the operation lever such as the planting clutch lever and the vertical movement of the work equipment. Some have also been proposed.

However, in the former type (operation lever interlocking type), at least two actuating parts must be operated simultaneously with one operation lever, which not only makes lever operation difficult, but also makes it difficult to operate the operation lever when replenishing seedlings. Even if you only disconnect the main clutch installed on the upper side of the transmission and stop the traveling section and the planting section at the same time, the fertilizer outflow prevention device will not operate, so you will have to disconnect the planting clutch, etc. again, and the work will be interrupted. However, the latter type, which is linked to the vertical movement of the work equipment (lifter-linked type), requires seedlings to be replenished with the planting section raised in order to prevent fertilizer from dripping when replenishing seedlings. In addition to placing a heavy burden on the operator, the fertilizer outflow prevention device does not operate until the planting area is fully raised, resulting in poor responsiveness and inability to perform quick and accurate fertilization.

Therefore, the present invention is a fertilization device in which a working machine equipped with a fertilizing nozzle is attached to the traveling machine body, and the fertilizer in the fertilizer tank attached to the traveling machine body is force-fed to the fertilizing nozzle through a hose using a fertilizing pump. In the working machine, a part of the hose connecting between the fertilization pump and the fertilization nozzle is provided with a fertilizer outflow allowing state in which the inside of the hose is opened to allow fertilizer to flow out to the fertilization nozzle side, and a state in which the inside of the hose is closed. A fertilizer outflow prevention device is provided with a switching mechanism that can be switched freely between a fertilizer outflow prevention state that prevents fertilizer outflow to the fertilization nozzle side, and a fertilizer outflow prevention device that is provided on the fertilization pump side to display the operating state and non-operation state of the fertilization pump. A detection device for detecting the state is provided, and the detection device of the fertilization pump and the switching mechanism of the fertilizer outflow prevention device are linked via a link operation mechanism, and the switching mechanism is activated when the fertilization pump is in operation based on the detection result of the detection device. By configuring the fertilizer outflow prevention device to switch in conjunction with the activation/deactivation of the fertilizer pump in order to switch the switching mechanism to the fertilizer outflow permissive state and switch the switching mechanism to the fertilizer outflow prevention state in the non-operating state, the above-mentioned conventional method can be improved. The aim is to eliminate the shortcomings of

The structure of the present invention will be described with reference to an embodiment shown in the drawings. This is a riding-type rice transplanter that is attached to
A fertilization tank 5 is mounted near the tank. 3a is a planting device.

Reference numeral 6 indicates an indicator, and reference numeral 7 indicates a fertilization pump. When the fertilization pump 7 operates, the fertilizer in the tank 5 is transferred to the work machine 3 via the indicator 6 and the flexible hose 8.
Fertilizer is discharged into the soil from a fertilizer nozzle 9 attached to the fertilizer.

Reference numeral A denotes a fertilizer outflow prevention device, which is disposed between the pump 7 and the nozzle 9, and is configured to elastically bias an elastic tube provided in the middle of the hose 8 to the nozzle 9 side. The switching mechanism T closes the opening and prevents the fertilizer from flowing out.

That is, the switching mechanism T opens the inside of the hose 8 to allow the fertilizer to flow out to the fertilizing nozzle 9 side, and closes the inside of the hose 8 to prevent the fertilizer from flowing out to the fertilizing nozzle 9 side. It is configured to be freely switched between the fertilizer outflow prevention state and the fertilizer outflow prevention state.

The fertilizer pump 7 and the fertilizer outflow prevention device A are connected to each other so that the switching mechanism T of the fertilizer outflow prevention device A switches in conjunction with the fertilizer pump 7.

FIG. 2 shows an example of the mounting structure of the fertilization pump 7, the fertilizer outflow prevention device A, and a linking operation mechanism for these two.

The fertilizer pump 7 is fixed to the traveling body 1 via brackets 10 and 11, and the rotational speed of the pump 7 can be changed to seven speeds by operating the gear change lever 12 of the transmission B and changing the transmission chain 13. The chain 13 is configured so that the chain 13 can be replaced as desired by operating a core spacing adjustment lever 14. Reference numeral 15 denotes a drive shaft on the way to the PTO shaft, and the power transmitted through the chain from the drive shaft 15 is appropriately changed in speed and transmitted to the pump shaft 7a to drive the pump 7.

Reference numeral 16 denotes a detection device located near the protruding end of the pump shaft 7a and fixed to the pump 7 via a bracket 17. This detection device 16 detects whether the pump 7 is in an operating state (operating state) or in a non-operating state (stopped state). is detected and sends an electrical signal to the control device 18.

Reference numeral 19 denotes a solenoid for switching operation of the switching mechanism T in the fertilizer outflow prevention device A, and its operating rod 19
A is pivotally connected to one end of a bell crank-shaped arm 20 whose intermediate bent portion is pivotally supported. A pressing roller 21 is protruded from one side of the other end of the arm 20, and a tension spring 23 causes the roller 21 to
1 presses and closes the elastic tube 22 connected to the hose 8 to prevent the fertilizer from flowing out.

The above-mentioned detection device 16, control device 18, solenoid 19, etc. are collectively referred to as a linked operation mechanism, and the solenoid 19 is electrically connected to the above-mentioned control device 18, and the operating state of the pump 7 is detected by the detection device 16. Based on this, when the fertilizer pump 7 is in operation, the switching mechanism T of the fertilizer outflow prevention device A opens the fertilizer flow path and enters the fertilizer outflow allowing state, which allows the fertilizer to flow out to the fertilizer nozzle 9 side. The fertilizer outflow prevention device A controls the operation of the fertilizer pump 7 in order to switch freely between the fertilizer outflow prevention state in which the flow path is blocked and the fertilizer outflow to the fertilization nozzle 9 side is prevented.
The switch is configured to be operated via the linked operation mechanism in conjunction with the non-operation.

In the illustrated example, the fertilizer outflow prevention device A is connected to a parallel link mechanism 2a that constitutes a part of the work equipment lifting device 2.
Although the structure is such that it is placed on the lower link 2'a, the placement location can be arbitrarily selected.

In the figure, 24 is a fulcrum pin.

In the configuration as described above, when the planting operation is started, the fertilization pump 7 operates in conjunction with the planting device 3a, so that fertilization is performed at the same time as planting. , the detection device 16 senses this and sends an electric signal to the control device 18, so the operating rod 19a of the solenoid 19 retracts and the arm 20 of the switching mechanism T springs around the fulcrum pin 24 as shown in solid line in FIG. 23 in a counterclockwise direction, thereby rotating the roller 21
is separated from the elastic tube 22, the closed state of the elastic tube 22 is released, and a fertilizer outflow allowing state is established in which the fertilizer is allowed to flow out to the fertilization nozzle 9 side, and the fertilizer in the tank 5 is discharged from the fertilization nozzle 9 into the soil.

Furthermore, when the main clutch or the planting clutch is disconnected to stop planting, the operation of the fertilizing pump 7 is also stopped, so when the operating rod 19a of the solenoid 19 is restored by the control device 18, the arm of the switching mechanism T is activated by the tensile force of the spring 23. 20 rotates clockwise and the roller 21 presses the elastic tube 22, thereby closing the elastic tube 22 and entering a fertilizer outflow prevention state in which the fertilizer outflow toward the fertilizing nozzle 9 is prevented. Therefore, in conjunction with the stoppage of the planting device 3a, the operation of the fertilization pump 7 is also stopped, thereby cutting off the supply of fertilizer in the tank 5. However, in conjunction with the stoppage of the pump 7, the operation of the elastic tube 22 is stopped. Since it is automatically closed, the fertilizer remaining in the hose 8 is prevented from flowing out (dripping). In addition, as a result, the remaining fertilizer in the hose is retained at a position near the nozzle 9, so that when the planting operation is restarted, it can be quickly discharged from the nozzle 9 without interrupting the fertilization, and therefore the operation can be carried out quickly. There will be no uneven fertilization when restarting.

As described above, according to the present invention, the fertilizer outflow prevention device A is switched and operated via the interlocking operation mechanism in conjunction with the activation/deactivation of the fertilizer pump 7, so the main clutch is not operated when replenishing seedlings or when stopping work. Just cutting it will prevent the fertilizer from dripping out, so there is no need to cut the planting clutch after cutting the main clutch, unlike with conventional control lever-linked models. Inconveniences such as weight increase are also eliminated.

In addition, since the fertilizer run-off prevention device A operates immediately in conjunction with the fertilizer pump 7, the response is much better, which not only eliminates the poor response that is the drawback of the conventional lifter-linked type. Since the inconvenience of having to replenish seedlings with the planting section raised is eliminated, the burden on the operator is further reduced.

Since the present invention is constructed as described above, when replenishing seedlings or stopping work, simply cutting off the power transmission to the planting device and stopping the fertilization pump can reliably prevent the fertilizer remaining in the hose from dripping out. In addition, the workability is extremely improved, the burden on the operator can be further reduced, and the responsiveness of the fertilizer outflow prevention device can be improved, and uneven fertilization can be eliminated as much as possible.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of a riding rice transplanter equipped with the present invention, and Fig. 2 is an explanatory diagram of the operation of the main parts. In the figure, 1 is a traveling machine body, 2 is a lifting device, 3 is a working machine, 5 is a fertilization tank, 7 is a fertilization pump, 8 is a hose, 9 is a fertilization nozzle, 16 is a detection device, 18 is a control device, and 19 is an attachment. 22 is an elastic tube, A is a fertilizer outflow prevention device, and T is a switching mechanism.

Claims (1)

[Scope of utility model registration request] In a working machine with a fertilization device, a working machine equipped with a fertilization nozzle is attached to a running machine body, and the fertilizer in a fertilizer tank attached to the running machine body is applied by pressure by a fertilizer pump to the fertilizing nozzle through a hose. A part of the hose that connects the fertilization pump and the fertilization nozzle has a fertilizer outflow allowing state in which the inside of the hose is opened to allow fertilizer to flow out to the fertilization nozzle side, and a state in which the inside of the hose is closed to allow fertilizer to flow out to the fertilization nozzle side. A fertilizer outflow prevention device is provided that has a switching mechanism that can be switched freely between a fertilizer outflow prevention state and a fertilizer outflow prevention state that prevents the fertilizer outflow, and the fertilizer pump side is provided with a device that detects an operating state and a non-operating state of the fertilizer pump. A detection device is provided, and the detection device of the fertilization pump and the switching mechanism of the fertilizer outflow prevention device are linked via a link operation mechanism, and based on the detection result of the detection device, when the fertilization pump is in operation, the switching mechanism is set to a state where fertilizer outflow is allowed. work with a fertilizer application device, characterized in that the fertilizer outflow prevention device is configured to switch and operate in conjunction with the activation and deactivation of the fertilization pump, so that the switching mechanism is switched to the fertilizer outflow prevention state in the inactive state. Fertilizer spill prevention device in the machine.