JPH0367651B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an alarm device for an agricultural membrane coating device, which detects when there is no agricultural membrane in the membrane supply section.
This is to ensure that the operator knows this.

<Prior art> In so-called mulching work in which ridges are covered with agricultural membrane bodies such as sheets or films, ridges are formed by a ridge former at the rear of a tiller, and agricultural membrane bodies fed out from a membrane feeding unit are mulched. An agricultural membrane covering device is used which is stepped on using a treading body, so that the membrane can be coated at the same time as the ridges are formed. However, if the agricultural membrane is used up during the work and there is no membrane in the membrane feeder, the worker does not notice this.
Work often continued as it was, which hindered the smooth progress of work.

Therefore, a detector is provided in the membrane feeding section to detect the absence of the membrane and issue an alarm, which has already been proposed in Japanese Utility Model Publication No. 60-24128.

<Problems to be solved by the invention> However, since there is only one detector in the membrane feeding section, an alarm is constantly generated even after the membrane is used up and until a new membrane is attached. There was a drawback that the device would work and issue an alarm. Therefore, when the membrane runs out, you must first turn off the alarm and then attach a new membrane. Therefore, if you forget to turn on the alarm after installing the membrane, the membrane in the membrane feeding section There was a problem that no alarm would be issued even if the battery ran out.

<Means for Solving the Problems> As a means for solving the problems of the conventional art, the present invention provides a method for solving the problems of the conventional art by rotating the film roll 14 attached to the film delivery unit 11. 1
The agricultural membrane body 15 of No. 4 is pulled out and paid out onto the ridge 13,
This agricultural membrane body 15 is attached to the membrane body treading bodies 2 on both sides of the ridge 13.
In the mobile agricultural membrane covering device which covers the agricultural membrane 15 on the ridges 13 by stepping on the agricultural membrane 15 by stepping on the agricultural membrane 15, a first detector 24 detects the rotation of the membrane roll 14 of the membrane feeding section 11; a second detector 27 for detecting rotation of rotating parts 9, 20, and 21 that rotate at a part other than the membrane roll 14 of the membrane feeding unit 11 and during the coating operation of the agricultural membrane 15; and a first detector. 2
an alarm device 3 that issues an alarm when the detection signal from the second detector 27 stops and there is a detection signal from the second detector 27;
1.

<Function> During the work, the membrane roll 14 is mounted between the pair of roll supports 23 of the membrane feeding section 11, and the membrane 15 is sequentially passed through each part as shown in FIG. After that, run the tractor.
Then, the tilling device 3 tills the field, and the ridge former 7 forms the ridges 13 in a predetermined shape. Then, while rotating the membrane roll 14 together with the roll support 23 of the membrane feeding section 11, the membrane 15 is pulled out, and the membrane 15 is fed out onto the ridge 13 via the guide members 17 and 18. Treading bodies 2 on both left and right sides
0 steps on the membrane body 15 while rotating, and then covers the edge of the membrane body 15 with soil using the soil covering member 21.
The membrane 15 is sequentially coated on the ridges 13.

During this coating work, the roll support 14 and the treading body 20 of the membrane feeding section 11 are rotating in synchronization with the work speed, so the first detector 24 and the second detector 2
7 is an intermittent signal a at regular intervals as shown in FIG.
b is generated as a detection signal. Then, at the rising edge of each intermittent signal a, b, the pulse signal generator 34,
35, and the pulse signal generators 34 and 35 generate pulse signals c and d which are larger than the interval between the signals a and b. While the intermittent signals a and b are generated at intervals smaller than the pulse width, the pulse signal generators 34 and 35 are triggered, so the pulse signals c and d are not interrupted at all. After the signal from the pulse signal generator 34 is inverted by the NAND gate 38,
Since the signal from the pulse signal generator 35 is sent to the NAND gates 39 and 40, while the signals from the pulse signal generators 34 and 35 are both at high level,
Since the output of NAND gate 40 shows a low level and transistor 41 is off, buzzer 31 is not activated. In other words, it does not issue an alarm during normal operation.

When the film body 15 of the film body roll 14 runs out during the work, the intermittent signal a of the first detector 24 stops as shown in FIG. 6, so the pulse signal generator 34 stops generating pulse signals, and the NAND gate 38
output becomes high level. On the other hand, since the stepping body 20 is rolling during work, the pulse signal generating section 35
is working normally, so the output of the NAND gate 39 is low level, the output of the NAND gate 40 is high level, the transistor 41 is turned on, the buzzer 31 is activated, and an alarm is issued that the membrane body 15 is gone. do.

When installing a new membrane roll 14 between the pair of roll supports 14 of the membrane feeding unit 11, the running is stopped and both the detectors 24 and 27 generate intermittent signals a and b. Therefore, the signals of the pulse signal generators 34 and 35 are at low level. For this reason
The output of NAND gate 38 is high level, the output of NAND gate 39 is high level, NAND gate 40
The output becomes low level, and the buzzer 31 does not operate. Therefore, there is no need to turn off the alarm circuit when mounting the membrane roll 14, and even if the work is started immediately after mounting the membrane roll 14, the alarm device operates in a predetermined manner.

<Example> Hereinafter, the present invention will be described according to an illustrated example. In FIGS. 1 and 2, reference numeral 1 denotes a tilling device, which is towed behind a tractor via a three-point link 2. The tilling device 1 includes a tilling section 3 which is driven by receiving power from a PTO shaft of a tractor, and the tilling section 3 works to till the soil and to appropriately crush the soil and bring it to the center. 4 is the support rod, tilling device 1
This support rod 4 is pivotally connected to the machine frame 5 and extends rearward.
A tool bar 6 is suspended horizontally behind the. Reference numeral 7 denotes a ridge shaper attached to the tool bar 6 via a bracket 8 or the like, which is disposed at the rear central part of the tillage device 1, and shapes the ridges 13 from tilled soil.
Reference numeral 9 denotes a pair of left and right gauge wheels arranged on both sides of the ridge former 7, which are attached to the tool bar 6 via a gauge support member 10. Reference numeral 11 denotes a membrane feeding section, which is equipped with a roll support 23 rotatably via a support shaft 22 on a pair of left and right support arms 12, and is provided between the pair of left and right roll supports 22 so as to be orthogonal to the ridge 13. A membrane pair roll 14 is supported on the membrane.
An agricultural membrane 15 made of a film or sheet is wound around the membrane roll 14 so as to be freely drawn out toward the ridges 13. The support arm 12 is provided to project rearward from the gauge support member 10. Reference numeral 16 denotes a mounting rod that projects rearward from the center of the tool bar 6 in the longitudinal direction. Reference numeral 17 denotes a front guide member, which extends from the front end of the mounting rod 16 around the center lower part of the membrane body delivery part 11, and has an arch-shaped first guide part 17a at the rear and lower part of the membrane body delivery part 11. Be prepared. Reference numeral 18 denotes a rear guide member, which is attached to the rear end of the mounting rod 16 in a hanging manner, and has a second guide part 1 arranged rearward of the first guide part 17a with an arch shape extending over the ridge 13 on the lower end side thereof.
8a. The guide members 17 and 18 are for guiding the membrane body 15 fed out from the membrane body feeding part 11,
The membrane body 15 passes above the first guide part 17a and extends to the second guide part 17a.
It is guided in the backward downward direction along the lower side of the guide portion 18a. Reference numeral 19 denotes a pair of left and right protruding rods which are provided rearwardly on the tool bar 6. At the rear ends of the protruding rods 19, a pair of left and right membrane treading bodies 20 and a pair of left and right soil covering members 21 located behind them are attached. It is being

24 is a first detector that generates an intermittent signal as a detection signal during rotation of the membrane roll 14 of the membrane feeding unit 11, and is composed of a micro switch, etc., and its detection piece 25 is as shown in FIGS. 3 and 4. As shown in FIG. 2, it is configured to be operated intermittently by a gear wheel 26 fixed to a roll support 23. Note that the first detector 24 is connected to the support arm 12 via a bracket (not shown).
etc. are installed.

A second detector 27 detects the rotation of the stepping body 20 rotating during the coating work and generates an intermittent signal as a detection signal, and is composed of a micro switch or the like, and a support arm 28 supporting the stepping body 20. The detection piece 29 is intermittently operated by a gear wheel 30 that rotates integrally with the tread body 20.

FIG. 5 shows the first detector 24 and the second detector 27.
An electrical circuit is shown for processing the signal from the first detector 24 and activating the buzzer (alarm) 31 when the signal from the first detector 24 is stopped and the signal from the second detector 27 is present. 32, 33 are gate circuits, 34,
Reference numeral 35 denotes a pulse signal transmitter, which is composed of, for example, a retrigger type monostable multivibrator, which can be retriggered by intermittent signals from the respective detectors 24 and 27, and generates a pulse signal with a predetermined pulse width.
Reference numerals 36 and 37 denote pulse width setting sections, which are composed of a capacitor and a resistor, and determine the pulse width of the pulse signal. 38, 39, and 40 are NAND gates, and 41 is a transistor for driving the buzzer 31.

It should be noted that the second detector 27 rotates during work, and only needs to detect the rotation of something other than the membrane feeding section 11, so the gauge wheel 9 and the soil covering member 21
etc. may be linked.

Further, in the embodiment, a simultaneous rear rotor type equipped with a rear rotor device 3 is exemplified, but the present invention is not limited to this. can be implemented in the same way.

<Effects of the Invention> According to the present invention, the first detector 24 for detecting the rotation of the membrane roll 14 of the membrane body feeding section 11 and the part other than the membrane body roll 14 of the membrane body feeding section 11 and the agricultural A second detector 27 detects the rotation of the rotating parts 9, 20, and 21 that rotate during the coating operation of the membrane body 15.
and an alarm 31 that issues an alarm when the detection signal from the first detector 24 stops and there is a detection signal from the second detector 27. When the membrane body 15 is completely removed from the membrane body 14 and the coating work is still in progress, the alarm device 31 issues an alarm. Therefore, it is possible to reliably warn that the membrane has run out, and there is no need to issue an alarm when replenishing the membrane feeding unit 11 with a new membrane roll 14, unlike in the past when the switch is turned on and off when replenishing the membrane. There is no need to do this, and you can start work immediately after replenishing the membrane body.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which FIG. 1 is a side view of the whole, FIG. 2 is a plan view of the same, FIG. 3 is a side view of the detector drive section, FIG. The figure is an electric circuit diagram, and FIG. 6 is a waveform diagram. DESCRIPTION OF SYMBOLS 11...Membrane body feeding part, 13...Ribule, 14...Membrane body roll, 15...Membrane body, 20...Treading body, 24
...First detector, 27...Second detector, 31...
Buzzer (alarm).

Claims (1)

[Claims] 1 Membrane body roll 14 attached to membrane body feeding unit 11
The agricultural membrane 1 of the membrane roll 14 is rotated.
5 and let it out onto the ridge 13, this agricultural membrane body 1
In the mobile agricultural membrane covering device, which covers the agricultural membrane 15 on the ridge 13 by stepping on the agricultural membrane 15 with the membrane treading bodies 20 on both sides of the ridge 13, the membrane feeding unit 1
a first detector 24 that detects the rotation of the first membrane roll 14; and rotating parts 9, 20 that rotate during the coating operation of the agricultural membrane 15 at parts other than the membrane roll 14 of the membrane feeding section 11. , 21, and an alarm 31 that issues an alarm when the detection signal from the first detector 24 stops and there is a detection signal from the second detector 27. An alarm device for an agricultural membrane covering device, characterized in that: