JPH0127683B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an abnormality detection device used in granular material supply devices such as seeding devices and fertilization devices.

A seeding device is equipped with a plurality of seeding machines arranged in parallel, each of which uses a feeding means such as a feeding roll to sequentially feed the seeds in a tank down through a tubular channel into a field, thereby simultaneously sowing multiple rows of seeds. It is used. In such a seeding device, if there are no seeds in the tank or if the flow path is clogged, normal seeding will not occur, so it is necessary to detect that the flow of seeds has stopped and issue an alarm. However, in the case of a seeding device with multiple seeding machines installed side by side, if one seeding machine stops running due to an abnormality, the feed rolls of all the sowing machines will stop, so The detection devices of the seeding machines began to display abnormalities all at once.
There is a problem in that it becomes impossible to identify in which seeding machine the actual abnormality has occurred. In addition, since the seeds sown in the field are usually covered with soil using soil covering plates, it is almost impossible to judge by appearance which rows in the field have not been sown. It's impossible.

In view of the above circumstances, this invention preferentially activates only the abnormality display means of the first seeding machine (feeding machine) in which an abnormality actually occurs, so as not to notify subsequent pseudo abnormalities due to stopping of running, etc. The present invention provides an abnormality detection device that provides the following features. The embodiments shown in the drawings will now be described.

FIG. 1 is a side view showing the usage state of a seeding device which is a granular material supply device, FIG. 2 is a plan view of the seeding device, and FIG. 3 is a rear view and a cross-sectional view of main parts. The illustrated seeding device A is attached to a traveling device B as a whole and is towed for use, and is designed to be used for seeding work in paddy fields.

The traveling device B includes a prime mover 3, a pair of left and right traveling wheels 4, and a float 5, and the rotational power of the prime mover 3 is transmitted to a hydraulic pump rotating shaft 9 via pulleys 6, 7 and a belt 8, and from there. Furthermore, it is transmitted to a power transmission shaft 13 via pulleys 10 and 11 and a belt 12. The belt 12 is kept under tension by a tension pulley 14 that is biased in the direction of the arrow X by a spring (not shown), but the belt 12 is loosened by rotating the tension pulley 14 in the opposite direction to the arrow X. By this, the transmission shaft 1
It is possible to cut off the transmission of power to 3. Transmission shaft 1
The rotational power transmitted to the sprocket wheel 3 is transmitted to the sprocket wheel 16 in the chain case 15 via a transmission (not shown), and rotates the traveling wheel 4 via the chain 17 and sprocket wheel 18.

The chain case 15 is pivotally supported by a support shaft 19 so as to be rotatable up and down, and an arm 20 that projects upward is provided near the shaft support. The upper end of the arm 20 is connected to a hydraulic cylinder (not shown) housed in the bonnet 21, and the chain case 15 is rotated up and down by expansion and contraction of the hydraulic cylinder. Hydraulic pressure is supplied to the hydraulic cylinder via a hydraulic valve (not shown) from a hydraulic pump driven by the rotary shaft 9, and this hydraulic valve is connected to the float 5 by a detection rod 32. , the supply of hydraulic pressure to the hydraulic cylinder is adjusted by rotating the float 5 in the vertical direction. The rear part of the float 5 is a support member 33 fixed to the hitch 1.
The front part is suspended from the machine frame 35 by a link 34. When the plowing depth becomes shallow and the ground pressure of the float decreases, the traveling wheels 4 are raised by the action of the hydraulic valve and hydraulic cylinder.
Conversely, when the ground pressure of the float increases, the running wheels 4 descend. It should be noted that a change lever 37 is provided protruding from the rear of the traveling device B, and the change lever 37 can be used to switch the transmission.

The seeding device A is equipped with a rectangular cylindrical base frame 50 with a flange 50a that is fixed to the hitch 1 of the traveling device B by bolts 2, 2, . Horizontal bars 51 and 52 are provided. Support members 53, 53' that protrude rearward are provided at both ends and the middle part of the upper horizontal bar 51,
Left and right handles 54, 54 are fixed to the lower horizontal beam 52. At both ends of the upper horizontal bar 51,
A chain case 55 supported by side support members 53 is disposed downward from the rear, and a driving wheel 56 is rotatably provided at the lower end of the chain case 55. During seeding work, the driving wheel 56 in contact with the field is rotated by the resistance of the topsoil, and this rotational force is transmitted to a feed-out roll 77, which will be described later, to feed out the seeds. A large number of protrusions 56a that bite into the field are planted on the outer periphery of the driving wheel 56. Inside the chain case 55 are sprocket wheels 57, 58 and the chain 5.
9 are provided, and the rotational motion of the driving wheel 56 is transmitted to the payout roll drive shaft 60 via these. The chain case 55 is rotatably supported at its upper end by a payout roll drive shaft 60 passing through the side support member 53, and suspended by a hanging rod 61 at its middle part. The hanging rod 61 is a support plate 6 that projects diagonally upward from the rear of the support member 53.
2, and the lower surface of the support plate 62 and the pin 63
It is always urged downward by a spring 64 provided between the two. A U-shaped connecting portion 61a is provided at the lower end of the hanging rod 61, and is attached to a projecting piece 55a provided on the chain case 55 with a pin 66. A retaining pin 65 is provided at the upper end of the hanging rod 61, and the retaining pin 65 is kept floating above the upper surface of the support plate 62 during work.
When the driving wheel 56 descends more than a certain amount due to the lowering of the field, the retaining pin 65 is attached to the support plate 62.
It is designed to come into contact with the top surface of the roof to prevent it from falling further. A limit switch 67 is provided at the upper end of the suspension rod 61 to detect a descent of the driving wheel 56 by a certain amount or more.

A seed sowing machine 71 held within an outer case 70 is attached to support members 53', 53' at an intermediate portion of the horizontal beam 51. That is, a mounting plate 72 projecting laterally is bolted to the channel-shaped support member 53', and the seeding machine 71 and the hopper 7 are attached to this.
3 are wing nuts 74 and mounting bolts 75, respectively.
It is fixed by. The seeding machine 71 is equipped with a feed roll 77 with a groove 76, and when this is rotated in the direction of arrow Y by the feed roll drive shaft 60, seeds stored in a tank 78 are disposed in the groove 7.
The seeds that are inserted into the seeds 6 are sequentially put into the hopper 73 and supplied to the field through the pipe 79 which is a seed flow path. In addition, the seeding device A in the illustrated example has 4
Table sowing machines 71, 71, ... are installed in parallel, two of these sowing machines are housed in the outer case 70, and one set of sowing machines drives one feed roll. It is adapted to be driven by a shaft 60.

The left and right handles 54, 54 have upper and lower horizontal bars 80,
They are connected to each other by 81. A display device 84 of an abnormality detection device is attached to the upper horizontal bar 80, and fork-shaped mounting frames 85, 85 are attached to the lower horizontal bar 81.
The horizontal bar 86 of the mounting frame 85 has support stems 89, 89.
is fixed, and the ribs 91, 91 of the leveling plate 90 are fixed to this.
is fixed. Grooving tools 92 , 92 each having a generally boat-like shape are provided in the middle of the leveling plate 90 , and the lower end of the pipe 79 is fixed inside the trenching tool 92 . Therefore, the seeds will fall into the grooves formed in the field by the groove cutting tool 92. At the rear of the groove cutting tool 92, there is a soil covering plate 94 at the rear end.
A protruding arm 93 having a structure is fixed thereto so that soil can be placed over the seeds that have fallen into the ditch in the field. Further, the lower horizontal bar 81 is rotatably provided, and by vertically rotating an operating lever 95 whose lower end is fixed to the horizontal bar 81,
The ground leveling plate 90 can be rotated in the direction of arrow Z to change its angle to the ground. In the illustrated example, one ground leveling plate 90 is provided for one set of seeding machines 71, 71, and two groove making tools 92 are provided on one ground leveling plate at intervals.
In the figure, 96 is a line marker provided on the side of the seeding device A, which can be raised and lowered by a lever 97.

The abnormality detection device is connected to each pipe 79, which is a seed flow path.
Sensors 83, 83,... attached to 79,...
and a display device 84 connected to these sensors 83 by conductive wires 100. The sensor 83 includes a light emitting diode 101 and a phototransistor 102 that are diametrically opposed to each other while avoiding the bottom surface of the pipe 79.
It is configured to optically detect seeds passing between the two, convert the electrical signals into electrical signals, and supply the electrical signals to the display device 84. The display device 84 is
Each sensor is equipped with warning lamps L, L, ... as display means and a common buzzer Bz for each sensor, and when the seed passage signal from the sensor is interrupted, the buzzer Bz sounds and an alarm corresponding to that sensor is provided. A lamp L is lit to notify which seeding machine has an abnormality. Further, once the display means corresponding to one of the sensors is activated, even if an abnormality is subsequently detected by another sensor, the corresponding display means will not be activated. Fourth
The figure is a block diagram of the display device, and FIG. 5 is its circuit diagram. As shown in these figures, the signal from the sensor 83 is compared with a reference voltage by a comparison circuit C, and converted by a pulse generation circuit D into short pulses of constant width. This pulse is supplied to the reset circuit F of the integrating circuit E.
However, when the passing signal from the sensor 83 is interrupted, the above-mentioned discharge is no longer carried out, so the voltage of the integrating circuit E gradually rises, and this voltage exceeds the reference value of the comparator circuit G. (when it is determined that there is an abnormality), the alarm lamp L corresponding to the sensor is turned on via the lamp drive circuit H and the buzzer drive circuit, and the buzzer Bz is sounded. Further, the circuit of this display device is provided with a priority circuit K, and when an abnormality (no seeds passing) is detected in the signal of one sensor, subsequent abnormality detection regarding other sensors is performed. It is configured so that it will not occur. That is, this priority circuit K is constituted by an AND element (indicated by B) as shown in FIG. 5, and the output of this AND element becomes H level only when all inputs are at H level. When all sensors do not detect an abnormality, all inputs are at H level, but when any sensor detects an abnormality due to clogging, an L level abnormality signal is input from that sensor, so the output becomes L level. B
Since the No. 10 terminal becomes L, the transistor indicated by T turns off, and has the same effect as turning off SW67. Turning off the SW 67 and turning off the transistor T function to interrupt the voltage rise of the integrating circuit E. Therefore, no further abnormality detection is performed.

The abnormality detection device according to the present invention is configured to issue an alarm only for the first abnormality in the seeding machine that occurs, and not to alert for subsequent pseudo abnormalities in other seeding machines that occur due to stopping of running, etc. Even after the machine has stopped running, it is possible to clearly know which seeding machine is actually malfunctioning, and it is possible to quickly take corrective action, such as replenishing seeds to a seeding machine that has run out of seeds. Summer.

In the above explanation, we used a seeding device for paddy fields as an example, but this method can also be applied to other seeding devices that sow multiple rows of seeds at the same time by installing multiple seeding machines in parallel, or to granular material supply devices such as fertilization devices. It is clear that an anomaly detection device can be used.

[Brief explanation of drawings]

Figure 1 is a side view showing the use of the seeding device, Figure 2 is a plan view of the seeding device, Figures 3a and b are rear views and side sectional views of the main parts, and Figure 4 is the abnormality detection device. The block diagram and FIG. 5 are its circuit diagrams. All figures relate to embodiments. A... Seeding device, B... Traveling device, 3... Prime mover, 4... Traveling wheel, 5... Float, 15... Chain case, 50... Base frame, 51, 52... Horizontal beam, 55... Chain case, 56...driving wheel,
60...Feeding roll drive shaft, 71...Seeding machine,
77...Feeding roll, 78...Tanta, 79...
...Pipe, 83...Sensor, 84...Display device.

Claims (1)

[Claims] 1. An abnormality detection device for a particulate material supply device in which a plurality of feeders are arranged in parallel so that particulate matter in a tank is sequentially flowed down through a predetermined flow path, and the particulate material is prevented from passing through the flow path of each feeder In addition to providing a sensor for detecting, a display means for indicating an abnormality when the passage of particulate matter is interrupted for a certain period of time is provided corresponding to each sensor, and an abnormality is detected and displayed by any one sensor. When
An abnormality detection device for a particulate material supply device, characterized in that an abnormality display is no longer displayed by display means corresponding to other sensors.