JPS58198761A - Detector for flow-down of granular material - Google Patents

Abstract

PURPOSE:To detect the blockade of a flow passage, by discriminating an abnormality to display it when the output of a sensor which detects the passage of a granular material in the flow passage is not fluctuated. CONSTITUTION:The pulse signal output of the sensor which detect optically the passage of seeds in the flow passage is supplied to a pulse generating circuit D through a comparing circuit C. The pulse generating circuit D generates pulses having a prescribed waveform in accordance with the variance of the output of the sensor. An integrating circuit E is reset by the output of the pulse generating circuit D. If the flow passage is blocked and the circuit E is not reset by a reset circuit F, the output of the integration circuit E exceeds the reference value of a comparing circuit G to drive a buzzer Bz and an alarm lamp L.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for detecting the flow of granular materials such as seeds and granular fertilizers used in granular material supply devices such as seeding devices and fertilizing devices.

A seeding device is used in which seeds held in a hopper are successively supplied to the field through a tubular channel while traveling through the field. In this kind of equipment, if the flow path becomes clogged, a chip will occur, so it is necessary to take measures to open it immediately. I tended to be slow in noticing this. Seeds sown in the field are covered with soil using soil covering plates attached to the device.
If the blockage in the flow path is discovered late, it becomes extremely difficult to determine from which part the seeds are no longer being sown, which inevitably leads to the occurrence of absent plants and a significant drop in work efficiency. Furthermore, once a tubular flow path is blocked, the blockage condition becomes worse over time, so there has been a strong demand for a detection device that can quickly detect blockage of the flow path.

In view of the above circumstances, the present invention provides a detection device capable of quickly detecting a blockage accident in a flow path, and is characterized by a sensor that detects passage of particulate matter in a flow path , a determination device connected to this is provided, and if there is no variation in the output from the sensor due to the passage of particles, it is determined to be abnormal and displayed. The embodiments shown in the drawings will be described below.

FIG. 1 is a side view of a seeding device equipped with a detection device according to the present invention, FIG. 2 is an enlarged sectional view of the sensor, and FIG.
The figure is a block diagram of the determination device, FIG. 4 is an explanatory diagram of output pulses, and FIG. 5 is a circuit diagram.

The illustrated seeding device includes a seeding unit A and a traveling device B, 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 a pulley 6.7 and a belt 8, and from there. Furthermore, it is transmitted to the transmission shaft 13 via the boots IJ 10 , 11 and the belt 12 . belt 1
2 is tensioned by a tension pulley 14 which is biased in the direction of arrow X by a spring (1), not shown. The rotational power transmitted to the transmission shaft 13 is transmitted to the sprocket wheel 16 in the chain case 15 via a transmission device (not shown), and is then transmitted to the sprocket wheel 16 in the chain case 15 via the transmission device (not shown). The running wheel 4 is rotated via the sprocket wheel 18.

The chain case 15 is rotatably supported vertically by a support shaft 19, and an arm 20 projecting upward is provided near the support shaft. The upper end of the arm 20 is
It 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 rotating shaft 9. This hydraulic valve is connected to the float 5 by a detection rod 32, and The supply of hydraulic pressure to the hydraulic cylinder is switched by turning and moving in the vertical direction. The rear part of the float 5 is pivotally attached (P) to a support member 33 fixed to the hitch 1, and the front part thereof is suspended from a machine frame 35 by a link 34. When the ground pressure of the float decreases due to shallow plowing depth, the running wheels 4 rise due to the action of the hydraulic valve and hydraulic cylinder, and conversely, when the ground pressure of the float increases, the running wheels 4 descend. In addition, there is a change lever 3 at the rear of the traveling device B.
7 is provided in a protruding manner, and this change lever 37 can be used to change the transmission.

The sowing unit A is placed on the hitch of the traveling device B.
A rectangular cylindrical base frame 50 with seven flanges 50a fixed by 2121... is provided, and two upper and lower horizontal bars 51 and 52 are provided at the rear end of the base frame 5o. Support members 53, 53' projecting rearward are provided at both ends and an intermediate portion of the upper horizontal bar 51, and left and right handles 54, 54 are fixed to the lower horizontal bar 52. A chain case 55 supported by side support members 53 is disposed at the rear of both ends of the upper horizontal beam 51, and a driving wheel 56 is rotatably provided at the lower end of the chain case 55. ing. During seeding work, as the device moves, 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 is a sprocket wheel 57.
58 and a chain 59 are provided, and the rotational movement 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 passes through a support plate 62 that projects obliquely upward from the rear of the support member 53, and is always urged downward by a spring 64 provided between the lower surface of the support plate 62 and the pin 630. . The lower end of the hanging rod 61 is pivotally connected to the chain case 55. A retaining pin 65 is provided at the upper end of the hanging rod 61, and the retaining pin 65 is kept lifted from the upper surface of the support plate 62 during work. When the driving wheel 56 descends by a certain amount or more, the retaining pin 65
2 to prevent further descent.

The support members 53', 53' at the middle part of the horizontal beam 51 include:
A seeding machine 71 held within an outer case 70 is attached. The seeding machine 71 is equipped with a grooved delivery roll 77, and when this is rotated by the delivery roll drive shaft 60, the seeds stored in a tank 78 serving as a hopper are sequentially delivered into the receiving lower 3 as they fit into the grooves. The seeds are fed into the field through a pipe 79 which is a seed flow path.

The sowing unit A in the illustrated example includes four sowing machines 71.
71. ... are installed in parallel, and these seeding machines are 2
Each set of sowing machines is housed in an outer case 70, and one set of seed sowing machines (two sets) is driven by one feed-out roll drive shaft 60.

The left and right handles 54, 54 are connected to each other by upper and lower horizontal bars 80°81. A determination device 84 of the detection device is attached to the upper horizontal bar 80, and a fork-shaped mounting frame 85.85 is attached to the lower horizontal bar 81. The support stem 8 is attached to the horizontal bar 86 of the mounting frame 85.
9, 8'9 are fixed, and the ribs 91.9 of the leveling plate 90 are fixed to this.
91 is fixed. Approximately boat-shaped groove making tools 92, 92 are provided in the middle part of the ground leveling plate 90, and the pipe 7
A lower end portion of the groove forming tool 92 is fixed inside the groove forming tool 92.

Therefore, the seeds will fall into the grooves formed in the field by the groove cutting tool 92.

A protruding arm 93 having a soil covering plate 94 at the rear end is fixed to the rear part of the trench cutting tool 92, so that soil can be covered over seeds that have fallen into the trench 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 is rotated in the direction of arrow Z, and the ground leveling plate 90 is rotated in the direction of arrow Z. It is now possible to change the angle. 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 at intervals on one ground leveling plate. In the figure, 96 is a line marker provided on the side of the seeding unit A, and the lever 97
It has a C pin so that it can be raised and lowered.

The detection device is each pipe 79, 79 which is a seed flow path.

Sensor 83 attached to...83. ···and,
It consists of a determination device 84 connected to these sensors 83 and a conducting wire 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. The sensor 83 optically detects seeds passing between the two, converts this into an electrical signal, and uses it as a determination device. 84. therefore,
The output varies with each pass of the seed, and the fourth
A pulse-like signal as shown in Figure (a) is supplied to the determination device. When pipe 79 is blocked, the output remains at a high level and does not fluctuate. This sensor 8
3 can be provided either at the upper or lower part of the flow path, but since the lower opening of the pipe 79, which is the flow path, is often clogged by clods of soil, etc., it is preferable to provide the pipe 79 at the bottom as much as possible for clogging detection. is preferred. The determination device 84 includes alarm lamps L, L, . . . as display means corresponding to each sensor.
and a common buzzer Bz for each sensor, pipe 79
When an abnormality occurs such as when the seeding machine is blocked, a buzzer Bz is sounded and an alarm lamp L corresponding to the sensor is lit to notify which seeding machine has the abnormality.

The pulse-like signal from the sensor 83 is converted into a pulse as shown in FIG. 4(b) by the comparator circuit C, and is supplied to a pulse generating circuit. The pulse generation circuit is shown in Figure 4 (
As shown in C), (
The sensor 83 generates a pulse with a predetermined waveform by detecting the rise or fall of the signal from the sensor 83.
If the output of No. 3 does not fluctuate (remains at a high level or a low level), no pulse is generated. As such a circuit, there is a one-shot circuit as shown in FIG. 5, for example, but changes in the output of the sensor 83 may be detected by a differentiating circuit. The integral circuit E is reset by the pulses generated in this manner from the pulse generating circuit. When the output of the sensor 83 does not fluctuate (when there are no seeds in the tank or when the flow path is clogged), the above reset by the reset circuit F is not performed, so the output of the integrating circuit E is used as the reference for the comparator circuit G. When the value exceeds the value, it is determined that there is an abnormality, and the above-mentioned alarm means etc. are activated.

As explained above, the particulate matter flow detection device of the present invention determines that there is an abnormality when the output of the sensor provided in the particulate matter flow path does not fluctuate and displays this. If a road becomes clogged, it is now possible to take immediate action such as opening the road, thereby making it possible to prevent serious errors such as stock shortages. It is also possible to use this detection device to detect that the inner surface of the pipe, which is the flow path, has become heavily contaminated.

[Brief explanation of drawings]

FIG. 1 is a side view of an example of a seeding device equipped with a detection device according to the present invention, FIG. 2 is an enlarged sectional view of the sensor,
Fig. 3 is a block diagram of the determination device, Fig. 4(a),
(b) and (c) are explanatory diagrams of output pulses, and FIG. 5 is a circuit diagram of the pulse generation circuit. A... Seeding unit, B... Traveling device, 1... Hit, 3... Prime mover, 4... Traveling wheel, 5... Float, 15... Chain case, 50... Base frame, 51 ,5
2... Horizontal beam, 54... Handle, 56... Driving wheel, 71... Seeding machine, 83... Sensor, 84... Judgment device, 100... Conductor. Patent applicant Iseki Agricultural Machinery Co., Ltd. Agent Patent attorney Hiroshi Sugawara Figure 2 Figure 4

Claims (1)

[Claims] (1) A sensor used to detect the flow of particulate matter in a particulate matter supply device that causes particulate matter to sequentially flow down through a predetermined flow path, the sensor detecting the passage of particulate matter in the flow path. and a determination device connected to the sensor, and if there is no change in the output from the sensor due to passage of the particles, it is determined that there is an abnormality and is displayed.