JPH0429697Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a fertilization/seeding device in which a flow pipe is interposed between the lower end of the feeding mechanism and the upper end of the furrower.

[Conventional technology]

Conventionally, in this type of fertilization/seeding device, a downflow pipe has been integrally and fixedly connected to the lower end of the feeding mechanism fixed to the body frame and the upper end of the furrower fixed to the float.

[Problem that the invention attempts to solve]

Therefore, since the downstream pipes, which are easily clogged by the falling powder and granules, are integrally fixed and connected, they cannot be removed for maintenance due to clogging, making maintenance work difficult, and if removed, it would be difficult to remove them. The work had to be done integrally with the mechanism, etc., making the work large-scale.

The purpose of the present invention is to provide a device that can be easily and quickly operated by making simple modifications.

[Means for solving the problem] The feature of the present invention is that a flow pipe equipped with a particle clogging detection sensor is detachably interposed between the lower end of the feeding mechanism and the upper end of the groove making device. , its functions and effects are as follows.

[Effect]

In other words, by constructing the downstream pipe so that it can be attached to and detached from the feeding mechanism and groove making device, it can be removed independently, so that even if maintenance is required due to clogging, the work can be easily performed. Moreover,
Since a clogging detection sensor is provided in consideration of the fact that the downstream pipe is prone to clogging, it can also be effectively used when performing maintenance on this sensor.

[Effect of idea]

As a result, by making a simple modification to make the downstream pipe detachable, maintenance work can be done easily and quickly, and work efficiency during assembly has also improved, reducing the workload on workers. .

〔Example〕

As shown in FIG. 7, the aircraft is equipped with an engine E and a transmission case M at the front of the aircraft, and a control section 1 at the rear of the aircraft, and is supported by front and rear wheels 2 and 3.
A paddy field working machine is constructed by connecting a planting mechanism 29 consisting of a planting arm 28, etc., a seedling planting device 5 equipped with a seedling platform 30, etc., and a feeding device 6 for fertilization to the rear end of the machine via an elevating link mechanism 4. It is configured.

To explain the fertilizing feeding device 6 in detail, a feeding mechanism 8 is connected below a hopper 7 storing fertilizing powder and granules, and a downflow pipe 9, which is one of the inclined passages, is connected below the feeding mechanism 8. A groove making device 10 is connected through the groove making device 10, and powder and granular material is dropped and supplied into the groove provided by the groove making device 10. This downflow pipe 9 is provided with a capacitive flow detection sensor 11 capable of detecting the flow down state of the powder, and its configuration is as follows. That is, as shown in FIG. 5, a pair of positive and negative electrodes 12 and 12' are provided on the opposing inner peripheral surfaces of the downstream pipe 9, and when the positive and negative electrodes 12 and 12' are energized, the gap between the opposing electrodes 12 and 12' is The purpose is to drop powder and determine the clogging state based on the change in capacitance ΔC at that time.The procedure for this is to calculate the instantaneous flow rate F based on the change in capacitance ΔC. To find, F=K ₁ K ₂ ΔC K ₁ =ρ _s ε _s +2/ε _s −1, ρ _s : Powder true density d: Gap between electrode plates (in this case, the electrode plates are stretched along the circumferential surface of the downstream pipe) ε _s : Dielectric constant S ₁ : Electrode from the powder supply point Distance S ₁ to the top of the plate: This is the distance from the powder supply point to the bottom of the electrode plate, and the capacitance change reference value is based on the case where only air exists between the electrodes. The relationship between the instantaneous flow rate F of the powder and the change in capacitance ΔC is expressed by a linear relational expression as shown in Figure 6, and the flow rate F
When ΔC increases, the change in capacitance ΔC also increases.

Utilizing the characteristics of this capacitive sensor 11,
The control circuit for the buzzer and lamp 15, which is one of the alarms 14 to notify the operator of the blockage based on the detection results, will be described in detail below. A transmitting circuit 13 consisting of a crystal oscillator (25 to 30 KHz) or the like is connected to a sensor circuit 26 that processes signals from the sensor electrode plate 12.
A detection circuit 27 that synchronizes the signal transmitted through the sensor circuit 26 with the signal from the transmitter set corresponding to the case of clogging, and the bandpass filter 1
6, an amplifier 17 and a comparator circuit 18 are used to output an output to a buzzer 14 and a lamp 15 in the event of a blockage. As the lamp 15,
Use an LED, and connect this LED15 to transistor 2
It is connected to the collector side of No. 1 and lights up when a blockage occurs. The buzzer 14 is provided on the emitter side of a transistor 22 in a separate circuit branched from the circuit to the lamp 15, and is turned on and off by a normally closed relay switch 23 inserted on the base side of this transistor 22. It is configured so that The relay switch 23 is configured to operate to the cutting side based on the detection operation of a limit switch 25 that detects the cutting operation of the planting clutch lever 24, and when the capacitive sensor 11 detects clogging. The buzzer 14 is activated when the buzzer 14 is activated, and when the worker notices the activation of the buzzer 14 and disconnects the planting clutch lever 24, the buzzer 14 is activated to stop the buzzer 14, and is activated only for the minimum necessary time. It is configured.

The lamps 15 are respectively provided corresponding to the sensors 11, and a group of lamps includes a transparent resin hopper 7.
Since it is attached to the inner surface of the lid 7A, it is installed near the area that requires repair due to clogging, and is effective in ensuring that repair work is carried out reliably and quickly.

As shown in FIGS. 1 to 3, the downstream pipe 9 is provided with a protrusion 9A that extends laterally, and a signal processing control circuit including the oscillation circuit 13 is housed in the protrusion 9A. There is. And this protrusion 9
The downstream pipe 9 is installed between the feeding mechanism 8 and the furrowing device 10 so that A is located on the opposite side of the corresponding planting arm 28, and the wiring 32 to the lamp 15 and buzzer 14 is connected to the planting arm 28. It is constructed so that it does not unexpectedly protrude into the operating locus.

As shown in FIGS. 1 and 2, the mounting structure of the downstream pipe 9 will be described in detail. It can be attached by externally fitting the downstream pipe 9 onto the projection 8a, and can be removed by pulling it out against the force of contact with the protrusion 8a. or,
For the groove making device 10, the lower end of the downstream pipe 9 is inserted into the groove making device 10 and fixed, and is supported by a bellows-shaped holder 31 which also serves as a seal at the connection part between the groove making device 10 and the downstream pipe 9. be. When removing from the fixed state shown in the figure, the downstream pipe 9 is pushed down and pulled out from the connection pipe 8A, and once pushed into the bellows-shaped holder 31, it is moved diagonally upward from this bellows-shaped holder 31. It's meant to be pulled out.

[Brief explanation of the drawing]

The drawings show an embodiment of the fertilization/seeding device according to the present invention, in which Fig. 1 is a longitudinal cross-sectional side view of the downstream pipe, Fig. 2 is a back view showing the downstream pipe and the seedling planting mechanism, and Figure 3 is a rear view showing the downstream pipe and the seedling planting mechanism.
The figure is a cross-sectional plan view of the downstream pipe, Figure 4 is a control circuit diagram of a clogging detection sensor, Figure 5 is a diagram of the measurement principle of a capacitive sensor, and Figure 6 is a diagram showing the relationship between powder flow rate and changes in capacitance. FIG. 7 is a side view of a rice transplanter equipped with a fertilization device. 8... Feeding mechanism, 9... Downstream pipe, 10...
...Groove cutter, 11...Detection sensor.

Claims (1)

[Scope of utility model registration request] A downstream pipe 9 equipped with a particle clogging detection sensor 11 between the lower end of the feeding mechanism 8 and the upper end of the groove making device 10
A fertilizing/seeding device that is detachably installed.