JPH0433709Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a fertilization device mounted on a paddy field work vehicle such as a rice transplanter, and more specifically to the structure of a row stop switch that is linked to the changeover valve.

(b) Conventional technology Conventionally, a rice transplanter 1 equipped with a fertilization device has fertilizer tanks 3, 3 on the left and right sides of the driver's seat 2, as shown in FIG.
are arranged, and a nozzle 6 is arranged near each planter 5 in the planting section 4. and,
The fertilizer in the fertilizer tanks 3, 3 is sent to a sub-tank near the center of the traveling aircraft via a sanction hose, and from the sub-tank is further installed below the driver's seat via a number of hoses depending on the number of planting rows. is guided to the pump 7. As for the pump 7, a large number of flexible rotor pumps 7a corresponding to the number of planting rows are arranged in a line in the longitudinal direction of the aircraft, and a hose 8 is connected from the discharge port of each rotor pump 7a to the driver's seat. The fertilizer is fed to the fertilizer flow confirmation device (hereinafter referred to as an indicator) 9 installed next to the fertilizer flow indicator 2, and from each indicator 9 again to each hose 10...
The fertilizer is guided to each nozzle 6 near each planter 5 through the fertilizer, and is applied in a striped manner along the vicinity of the seedlings planted by the planter 5. In addition, in the vicinity of each indicator 9, there is a corresponding fertilization switching valve (not shown).

However, since each indicator 9 in the above-mentioned conventional fertilizer application device is arranged linearly in sequence in the direction of movement of the machine, there is a drawback that it is difficult to understand the correspondence between the nozzle 6 of each row and the indicator 9.
Similarly, since each fertilization switching valve is arranged linearly in sequence in the direction of movement of the machine, it is also difficult to understand the correspondence relationship with each planter 5, leading to forgetting to switch or erroneous operation.

Therefore, the fertilizer that is pumped from the fertilizer tank installed on the traveling aircraft is divided into multiple branched supply channels, and the fertilizer is sent to the rear of the traveling aircraft through a fertilizer flow detection sensor and a fertilizer flow path switching valve installed in each channel. In the paddy field work vehicle that supplies fertilizer to each fertilizer discharge nozzle attached to the paddy field work section in the section, each fertilizer flow detection sensor and each switching valve are arranged in parallel in the horizontal direction of the machine in order to correspond to each nozzle. A paddy field work vehicle has been proposed by the present applicant (see Utility Model Application No. 60-077365).

(c) Problems to be solved by the invention By the way, in the rice field work vehicle proposed by the applicant mentioned above, the switching valve is located away from the driver's seat, so that the operator can control the switching status of the valve while driving. Since it is difficult to visually confirm the switching of the row stop, etc., the status of the row stop switching etc. is displayed using lamps etc. so that it can be seen visually from the driver's seat. If a line stop switch to check the status is installed for each valve, a large number of switches will be required, leading to frequent failures and high costs, and a lamp etc. will be displayed corresponding to each switch. The operation panel, etc., becomes complicated, and there is a risk that it may interfere with driving.

(d) Means for solving the problem The purpose of the present invention is to solve the above-mentioned problems. For example, as shown in FIGS. One switch operation lever 60 for operating the detection switch 63 is installed so as to extend over a large number of valve members 51 arranged in a row in the fertilizer supply path from the fertilizer tank 25 and for operating the detection switch 63. It is configured to be long so that it can be pressed by all the switching levers 52, and is configured so that when the valve member 51 is operated to stop at even one location, a stop detection switch 63 is activated by the switch operation lever 60. It is characterized by this.

(e) Effect Based on the above-described configuration, when the arbitrary switching lever 52 is operated to stop the valve member 51 in line depending on the situation of fertilization work or for inspection of the fertilization device, the switch operation lever 60 It operates in conjunction with any of the switching levers 52, and thereby the strip stop detection switch 63 is operated.

(f) Examples Examples of the present invention will be described below with reference to the drawings.

As shown in FIGS. 6 and 7, the riding rice transplanter 11 has a traveling body 15 supported by front wheels 12 and rear wheels 13, and the traveling body 15 has an engine in front of the front wheels. 16 is mounted, and a driver's seat 19 is disposed such that a seat 17 is located between the front and rear wheels, that is, at the center of gravity of the machine. Further, a planting section 21 is supported at the rear of the traveling body 15 via a link 20 so as to be able to rise and fall freely, and a large number of planters 22...
A long seedling stand 23 on which two and a half pine seedlings can be vertically placed is also provided.

Fertilizer tanks 25, 25 for pasty or liquid fertilizer are installed on the left and right sides of the front of the aircraft, and a hose 27 is communicated through the aircraft frame 25 so as to connect the left and right tanks 25. Further, the hose 27 is connected to the step surface 2 of the driver's seat 19.
A suction hose 30 extends rearward below 9 and communicates with a pump device 31 disposed below the step surface 29 in the driver's seat 17 portion. Further, the pump device 31 is guided to each fertilizer flow detection sensor 33 and switching valve 35 installed in a row in the lateral direction of the machine via hoses 32 corresponding to the number of planting rows, and then to each hose 36 and It is led to a nozzle 39 near the planter 22 via a prevention valve 37.
These pump device 31, flow detection sensor 33, switching valve 35, drip prevention valve 37, and nozzle 39 are located below the fertilizer tank 25, and each of these component parts 25, 31, 33,
35, 37, and 39 are arranged in a substantially straight line from the front to the rear of the machine body in accordance with the flow of fertilizer.

The pump device 31 includes a large number of screw pumps corresponding to the number of planting rows, and these screw pumps are arranged in an annular manner on the same circumference with their suction sides facing the sub-tank 40.

On the other hand, the fertilizer flow detection sensor 33 is connected to a pressure detection switch 4 as shown in FIG. 4a, b, and c.
1, a detection section 42, and a body 43, and the detection section 42 further includes a step-shaped guide hole 45.
A cover 45 having a shape a is placed over a detection hole 46 formed in the body 43 and bolted. Further, on the upper surface of the cover 45, there is a circular engagement hole 45 having a rectangular notch at both ends of the circumference as shown in FIG. 5a.
An engaging portion 47a having the same shape as the engaging hole 45b is formed at the tip of the detecting pin 47 shown in detail in FIGS. 5b, c, and d.
is inserted from the guide hole 45a with the spring 49 attached, and is inserted by aligning the rectangular part of the engaging portion 47a with the engaging hole 45b.
By rotating the engaging portion 47a to the cover 45
The detection pin 47 is configured to be engaged with the upper surface so that the detection pin 47 is not moved downward beyond a predetermined position by the biasing force of the spring 49. Further, the body 4
The detection hole 46 formed in No. 3 is formed in the flow path 43a, and a diaphragm 50 made of rubber or the like is stretched above it so as to close the hole 46. Detection pin 4
7 is engaged with the upper surface of the cover 45 and the spring 49
Because the biasing force does not extend downward, the structure is such that it receives pressure only from the fertilizer that is normally held and fed without receiving unnecessary pressure. Therefore, the diaphragm 50 is not easily deformed, and there is no need for troublesome work such as pushing in a spring while assembling the diaphragm 50. Therefore, the detection part 42 can be assembled with simple work and has a long life. can be provided. The detection pin 47, which rises together with the diaphragm 50 as the pressure of the fertilizer increases, presses the contact portion 41a of the pressure detection switch 41 with its tip, and the switch 4 is activated.
Turn on 1.

Further, the switching valve 35 is connected to the body 43 of the flow detection sensor 33, as shown in FIGS. 1 and 2.
a valve body 51 that can be inserted into and connected to the
By rotating the switching lever 52 inside the body 51, the fertilizer flow is transferred from the sensor 33 side to the nozzle 39.
A stop member 55 is provided which rotates in the direction or in the direction of the sub-tank 40 via the return pipe 53, and furthermore, so as to communicate the return pipe 53 with the pipe 36 facing the nozzle 39 direction. and,
As shown in Figures 1 to 3, a cover 57 is installed above the switching valves 35 arranged in parallel in the lateral direction of the fuselage via brackets 56, 56. A U-shaped bracket 59 is fixedly installed, and at both ends of the bracket 59, a switch operation lever 60 is rotatable in the longitudinal direction of the machine via pins 61, 61, and is attached to the rear of the machine by a spring 62. It is set up with strong force. Furthermore, the switch lever 60
is formed to be long so as to be disposed across both ends of the switching valve 35, and the cover 5
A large number of notches 57a are formed on the rear side of the fuselage 7. Furthermore, the switch operation lever 6
A strip stop detection switch 63 is installed approximately in the center of the lever 0 with its contact portion 63a facing the lever 60. Therefore, when any one of the plurality of switching levers 52 is rotated to the position shown by the two-dot chain line in FIG. 52a
is inserted through the notch 57a of the cover 57 and the switch operation lever 60 is operated, which presses the contact portion 63a and activates the strip stop detection switch 63.
is turned on, and a lamp or the like is lit to notify the operator of the row fastening operation.

Since this embodiment has the above configuration,
The paste or liquid fertilizer injected into the fertilizer tanks 25, 25 installed at the front of the aircraft is passed through the hose 27 and the suction hose 30 extending approximately straight toward the rear of the aircraft based on the head difference. and is supplied to the sub-tank 40. Then, with the start of the planting work, the pump device 31 is driven, and each screw pump of the pump device 31 is connected to the sub tank 40.
The fertilizer inside is sucked in and discharged to each hose 32, and is further pressure-fed to the flow detection sensor 33 and the switching valve 35 via the hose 32, which extends substantially straight toward the rear of the machine. The fertilizer that has passed through the switching valve 35 when the lever 52 is in the solid line position shown in FIG. Dripping prevention valve 37
Further, each nozzle 39 applies fertilizer in a striped manner to the sides of the seedlings planted by each planter 22.
During fertilization work, if the nozzle 39 etc. becomes clogged for some reason and the fertilizer stops flowing, the stagnation of the fertilizer flow causes the flow path 43 to become clogged.
The pressure inside a increases, and that pressure causes the spring 49
The diaphragm 50 is moved upwardly against the force, and the tip of the detection pin 47 further presses the contact portion 41a. As a result, the pressure detection switch 41 is turned on, and the fact that the pipe is clogged is detected and displayed on the monitor section 65 (see FIG. 6). Furthermore, either of the switching valves 35 is activated by the operator's operation.
When the valve 35 is switched to the position indicated by the two-dot chain line in FIG. 2 and the fertilizer is returned toward the sub-tank 40, the switching lever 52, which rotates counterclockwise in FIG. By inserting the contact portion 52a through the notch 57a of the cover 57, the lever 52 of the switch operation lever 60
Press the position corresponding to . As a result, the operating lever 60 presses the contact portion 63a of the strip stopper detection 63 and turns on, and the electrical signal from the switch causes the monitor section 65 to display that a strip fixing operation is being performed on one of the valve bodies 51. be done.

In addition, by switching the switching valve 35, the flow path between the flow detection sensor 33 and the nozzle 39 can be shut off, and the fertilizer pumped by the pump device 31 can be returned to the return pipe 53, so that the fertilization work can be started. The pump device 31 and the detection sensor 33 can be inspected beforehand to ensure reliable fertilization work. Furthermore, since the switching valve 35 is located far from the driver's seat 19 and cannot be operated while driving,
Erroneous operation of the valve 35 during fertilization work can be prevented.

In addition, when the fertilization work is completed and the fertilization equipment is cleaned, water is injected into the empty tank 25, and the pump 31 is operated for a short time in the normal fertilization mode, and the pump 31, pipe 32, After cleaning the flow detection sensor 33 and the like, when the operating lever 52 is rotated clockwise from the solid line position in FIG. The return pipe 53, the pipe 36, the drip prevention valve 37, the nozzle 39, etc. are washed by the natural flow of washing water from the pipe 36. Furthermore, if air accumulates in the pump device 31 during supply of paste (or liquid) fertilizer to the fertilizer tank 25, the air can also be released from the return pipe 53 by switching the switching lever 52.

(G) Effect of the invention As explained above, according to the invention, one switch operation lever 60 that operates one strip stop detection switch 63 is made long so as to extend over a large number of valve members 51. Which switching lever 5
Since the configuration is such that the detection switch 63 is activated by the operating lever 60 even when the valve member 2 is operated to stop the valve, only one stop detection switch 63 is installed regardless of the number of valve members 51 installed in the fuselage. Therefore, it is possible to reduce the number of parts and provide a highly economical fertilization device, and it is also possible to reduce the number of harnesses associated with the switch 63 and make it more compact, which makes repairs and inspections in case of breakdowns easier. As a result, maintainability can also be improved.
Also, no matter which one of the switching levers 52 provided on a large number of valve members 51 is operated to stop the line, one line stop detection switch 6 is activated in conjunction with that lever 52.
3 is activated, all valve members 5
The monitor display can be simplified by making the display corresponding to 1 common.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the strip stop detection switch and switch operating lever according to the present invention, Fig. 2 is a side view thereof, Fig. 3 is a front view showing the switch operating lever in detail, and Fig. 4 a is a flowchart. A side view showing the detection sensor, FIG. 4b is a plan view thereof, FIG. 4c is a front view thereof, FIG. 5a is a plan view showing its detection part, FIG. Fig. 5c is a plan view showing the detection pin, Fig. 5d is a side view thereof, Fig. 6 is an overall side view showing a rice transplanter to which the present invention is applied, and Fig. 7 is a plan view thereof. FIG. 8 is an overall side view showing a conventional rice transplanter. 11...Paddy field work vehicle (rice transplanter), 25...
Fertilizer tank, 35... switching valve, 51... valve member (valve body), 52... switching lever, 60... switch operating lever, 63... row stop detection switch.

Claims (1)

[Scope of Claim for Utility Model Registration] A switching valve having a number of valve members arranged in a line is provided in a supply path for feeding fertilizer from a fertilizer tank, and is linked to the row stop operation of a switching lever provided on the valve member. The riding paddy field work vehicle is equipped with a row stop detection switch that operates as a row stop detection switch, wherein one row stop detection switch is installed, and one switch operation lever for operating the switch is connected to the plurality of valve members. and is configured to be long so as to be pressed by the switching levers of all the valve members, and when the valve member is operated to stop at even one point, a stop detection switch is activated by the switch operating lever. A fertilizer application device for a riding paddy field work vehicle configured as follows.