JP5162776B2 - Absence sensor in seedling transplanter - Google Patents

Description

The present invention relates to a stock loss sensor in a seedling transplanter for transplanting pot seedlings such as grains, vegetables, and flowers.

  As a prior art, a stock loss sensor of a pot seedling transplanter described in Patent Document 1 is exemplified. As shown in FIG. 6, this missing-stock sensor is a pot seedling planting planted by a seedling planting device while separating a pot seedling row from a seedling box and placing it on the top surface of the seedling feeding belt 102 by a seedling placement device. This is to detect that the pot seedling B has been lost in the machine. The configuration of this missing-stock sensor includes a seedling transfer device that receives a pot seedling row pushed out from a seedling box and transfers it to the upper surface of the seedling feeding belt 102 of the seedling planting device, and a non-contact sensor beam C. A seedling sensor 104 that irradiates the upper surface of the 102 along the seedling feeding direction and detects the presence or absence of the pot seedling B on the upper surface of the seedling feeding belt 102 is provided.

Japanese Patent Laid-Open No. 7-312935

  However, since the conventional seedling sensor 104 is configured to detect the presence or absence of the pot seedling B itself on the seedling feeding belt 102, dust or moisture due to the soil of the pot seedling B or the like causes the sensor beam of the seedling sensor 104. There is a problem that the seedling sensor 104 is liable to malfunction due to obstruction of light emission, light transmission, and light reception of C.

  In addition, most of the missing stocks are due to seedling box transportation troubles such as the seedling box being clogged with soil or the broken seedling box being caught on the machine during the work by the seedling transplanter. If an operator is late in noticing the seedling box transport failure, it will result in a continuous strain that cannot be planted continuously. In particular, in rear-mount seedling transplanters, the planting part is behind the operator, so it is often difficult to notice the missing stock, and it often becomes a continuous stock over a long distance. If it becomes a continuous stubble, it will be supplemented by hand planting, which will be a heavy burden on farmers.

In order to solve the above problems, the stock loss sensor in the seedling transplanter of the present invention is:
A seedling box transport device for transporting a seedling box in which a large number of pot seedling rooms are arranged along a seedling box transport path;
A missing plant sensor in a seedling transplanter equipped with a seedling extruding device that extrudes a predetermined number of pot seedlings from a seedling box at a predetermined extrusion position on the seedling box transport path,
An extrusion sensor for detecting the extrusion operation of the pot seedling in the seedling extrusion device, and a seedling box sensor for detecting the movement of the seedling box being conveyed by the seedling box conveyance device, wherein the extrusion sensor is a predetermined number of times of the extrusion. While detecting the operation, when the seedling box sensor does not detect the movement of a predetermined amount of seedling box, it is configured to issue an alarm,
The seedling box sensor rotates together with a seedling box sensor roller that is pivotally supported so as to roll when the outer periphery abuts against a bottom near the center in the width direction of the seedling box, and the seedling box sensor roller. A rotation plate provided; a through-hole provided at a fixed angle on the plate surface of the rotation plate; and a pair of photoelectric sensors for detecting the through-hole, through the rotation of the seedling box sensor roller; Configured to detect the movement of the seedling box,
The pair of photoelectric sensors are provided in such a positional relationship that when any one of the photoelectric sensors detects the through hole, the other photoelectric sensor does not detect the through hole.

According to the present invention, the operation of pushing the pot seedling in the seedling extruding device and the movement of the seedling box transported by the seedling box transporting device are detected, and the presence or absence of the pot seedling itself is detected. Therefore, it is easy to eliminate the influence of dust and moisture due to the soil of the pot seedling. In addition, since the movement of the seedling box is detected instead of detecting the operation of the seedling box transporting device, for example, the seedling box transporting device performs a predetermined operation, but the seedling box is damaged. Therefore, it is possible to detect a conveyance failure that does not move the seedling box. In addition, since the seedling detection condition is that the pot seedling is being pushed out, the seedling box is not moving because the seedling transplanter has stopped the planting operation. It is not determined that a stock has been generated.

As described above, in the present invention ,
The seedling box sensor includes a seedling box sensor roller that is pivotally supported so as to roll when the outer periphery abuts against a bottom near the center in the width direction of the seedling box, and the rotation of the seedling box sensor roller It is configured to detect the movement of the seedling box Te.

  This is because the seedling box feed holes are provided on both sides of the seedling box in the width direction, so that the seedling box is easily damaged and the outer periphery of the seedling box sensor roller is brought into contact with the vicinity of both sides. This is because the movement of the seedling box may not be detected well.

As described above, in the present invention ,
The seedling box sensor includes a rotating plate provided so as to rotate together with the seedling box sensor roller, a through hole provided at a certain angle on a plate surface of the rotating plate, and a pair of photoelectric sensors for detecting the through hole. With a sensor,
The pair of photoelectric sensors, either one of the photoelectric sensor becomes a state for detecting the through hole, the other of the photoelectric sensor is al provided a positional relationship in a state of not detecting the through hole.

  In this configuration, when only one photoelectric sensor is provided, the through-hole is not moved when the seedling box is slightly moved back and forth while being stuck in the seedling box transport path. If it is in the vicinity of the detection position of the photoelectric sensor, the detection signal of the photoelectric sensor is periodically output according to the back and forth movement, and it cannot be distinguished from when the seedling box is being transported normally. is there. According to this configuration, when the seedling box is slightly moved back and forth while being packed in the seedling box transport path, only one of the photoelectric sensors is in a state of detecting the through hole, and the seedling box is Since the pair of photoelectric sensors are in a state of detecting the through-holes alternately when being transported normally through the seedling box transport path, both can be identified.

According to the missing strain sensor in the seedling transplanter according to the present invention, there is an excellent effect that it is easy to eliminate the influence of dust and moisture due to soil of the pot seedling.

  1 to 5 show a missing line detection method and a missing line sensor 2 in a riding type seedling transplanter 1 according to an embodiment of the present invention. As shown in FIGS. 1 to 3, the seedling transplanter 1 includes a seedling box transport device 3 that transports a seedling box N in which a large number of pot seedling chambers Na are arranged along a seedling box transport path R, and the seedlings. A seedling extruding device 4 for extruding a predetermined number of pot seedlings P from the seedling box N at a predetermined extrusion position on the box transport path R, and a seedling mounting for replacing the predetermined number of pot seedlings P thus extruded onto the seedling transport belt 5 A replacement device 6, a planting device 7 for planting the pot seedlings P on the seedling transport belt 5 one by one in the field, and a stock loss sensor 2 for detecting the occurrence of a stock loss that prevents the pot seedlings P from being planted in the field. I have. In each figure, the arrow F indicates the front side of the aircraft.

  The seedling box transport device 3 is configured to move the seedling box N along the seedling box transport path R.

  The seedling extruding device 4 includes an extruding bar 10 provided in the rear of the seedling box transport path R so as to be movable back and forth, and an extruding drive mechanism 11 for moving the extruding bar 10 back and forth. The extrusion drive mechanism 11 of this example is configured to drive a rack 12 connected to the extrusion basket 10 with a pinion 13.

  As shown in FIGS. 2 to 5, the missing stock sensor 2 includes an extrusion sensor 15 that detects the extrusion operation of the pot seedling P in the seedling extrusion device 4 and the movement of the seedling box N that is being conveyed by the seedling box conveyance device 3. The seedling box sensor 16 for detecting the occurrence of the stock loss, the stock removal controller 17 for checking the occurrence of the stock loss based on the input signals from the extrusion sensor 15 and the seedling box sensor 16, and the stock removal controller 17 detected the occurrence of the stock loss. And an alarm output means 18 for informing that.

  As shown in FIGS. 2 and 3, the push-out sensor 15 is a proximity sensor that detects the approach of the rotating member 20 as the detected portion attached to the shaft of the pinion 13 of the push-out drive mechanism 11 in this example. In addition, when the extrusion basket 10 has pushed out the pot seedling P (a state indicated by a solid line in FIGS. 2 and 3), the rotating member 20 approaches the extrusion sensor 15.

  As shown in FIGS. 2 to 4, the seedling box sensor 16 rolls when the outer periphery abuts against the bottom of the seedling box N on the downstream side of the pushing position in the seedling box transport path R. A seedling box sensor roller 21 that is rotatably supported, a rotating plate 22 as a detected portion provided to rotate together with the seedling box sensor roller 21, and a plate surface of the rotating plate 22 at a certain angle. A provided through hole 23 and a pair of photoelectric sensors 24 and 25 for detecting the through hole 23 are provided. The rotating plate 22 of the present example is provided with through holes 23 at a certain angle corresponding to the feeding of the seedling box N for one pitch of the pot seedling room.

  In the seedling box sensor 16 of this example, when one of the pair of photoelectric sensors 24 and 25 detects the through hole 23, the other photoelectric sensor does not detect the through hole 23. They are provided in a positional relationship (see FIG. 4). In this configuration, when only one photoelectric sensor is provided, the through-hole 23 is moved when the seedling box N is slightly moved back and forth while being packed in the seedling box transport path R. If it is in the vicinity of the detection position A of the photoelectric sensor, the detection signal of the photoelectric sensor is periodically output according to the back-and-forth movement, and cannot be distinguished from when the seedling box N is being transported normally. Because. According to this configuration, when the seedling box N is moving back and forth slightly while being packed in the seedling box transport path R, only one of the photoelectric sensors detects the through hole 23, and the seedling box N is the seedling. When normally transported along the box transport path R, the pair of photoelectric sensors alternately detect the through holes 23, so that both can be identified.

  Further, in the seedling box sensor 16 of this example, the protrusion 21a arranged on the outer periphery of the seedling box sensor roller 21 is configured to abut against the bottom of the pot seedling chamber Na near the center in the width direction of the seedling box N. Has been. This is because the seedling box feed holes Nb are provided on both sides in the width direction of the seedling box N, so that the seedling box transporting device 3 easily breaks the outer periphery of the seedling box sensor roller 21 in the vicinity of both sides. This is because if the contact is made, the movement of the seedling box N may not be detected well.

  The stock removal controller 17 counts the number of extrusions of the extrusion basket 10 based on the extrusion detection signal from the extrusion sensor 15, and detects each photoelectric sensor based on the through hole detection signal from the pair of photoelectric sensors 24 and 25 of the seedling box sensor 16. 24 and 25 through-hole detection times are counted. Then, when the seedling box sensor 16 does not detect the movement of the predetermined amount of the seedling box N while inputting the extrusion detection signal three times as the predetermined number of times from the extrusion sensor 15, it is assumed that a stockout has occurred. The judgment is made and an alarm instruction is outputted to the alarm output means 18. Here, “the seedling box sensor 16 does not detect the movement of the predetermined amount of the seedling box N” means that one or both of the photoelectric sensors 24 and 25 do not detect the through hole 23 even once. Also, the reason why the number of times of the extrusion detection signal input from the extrusion sensor 15 is three is that the seedling box sensor roller 21 is positioned between the seedling boxes N which are continuously sent along the seedling box transport path R. This is because the movement of the seedling box N may not be detected while the extrusion detection signal is input once or twice.

  The alarm output means 18 is not particularly limited, but outputs a visual alarm (alarm light, alarm display, etc.), an audible alarm (alarm sound, alarm sound, etc.), a tactile alarm (alarm vibration, etc.), and other alarms. The mode to do is illustrated.

  According to the missing stock detection method and the missing stock sensor 2 of the seedling transplanter 1 of the present example configured as described above, the seedling pushing device 4 pushes out the pot seedling P and is transported by the seedling box transport device 3. The movement of the seedling box N is detected, and the presence or absence of the pot seedling P itself is not detected. Therefore, it is easy to eliminate the influence of dust and moisture caused by the soil of the pot seedling P. In addition, since the movement of the seedling box N is detected instead of detecting the operation of the seedling box transport apparatus 3, for example, the seedling box transport apparatus 3 performs a predetermined operation. Therefore, it is possible to detect a conveyance failure such that the seedling box N does not move. In addition, since it is a condition for detecting missing stock that the pot seedling P is pushed out, the seedling box N is not moving because the seedling transplanter 1 has stopped the planting operation. It is not mistakenly determined that a stock loss has occurred.

In addition, this invention is not limited to the said embodiment, For example, it can also be suitably changed and embodied as follows, for example in the range which does not deviate from the meaning of invention.
(1) The extruding operation is detected by the operation of the part different from the embodiment in the seedling extruding device 4.
(2) The movement of the seedling box N is detected by a part of the seedling box N different from the above-described embodiment.
(3) The setting of the predetermined number of pushing operations of the pot seedling P and the predetermined amount of movement of the seedling box N should be changed as appropriate according to the configuration of the seedling transplanter 1.

1 is a schematic side view of an entire seedling transplanter equipped with a missing strain sensor according to an embodiment of the present invention. It is an enlarged side view of the missing strain sensor equipment part in the seedling transplanter. It is an enlarged plan view of the same stock removal sensor equipment part. It is a side view of the seedling box sensor in the missing strain sensor. It is a block diagram which shows schematic structure of the stock loss sensor. It is a perspective view which shows the structure of the missing strain sensor in the conventional seedling transplanting machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seedling transplanter 2 Missing sensor 3 Seedling box conveyance device 4 Seedling extruding device 10 Extruding basket 11 Extrusion drive mechanism 12 Rack 13 Pinion 15 Extrusion sensor 16 Seedling box sensor 17 Missing controller 18 Alarm output means 20 Rotating member 21 Seedling box Sensor roller 22 Rotating plate 23 Through hole 24 Photoelectric sensor 25 Photoelectric sensor N seedling box Na pot seedling room Nb seedling box feed hole P pot seedling R seedling box transport path

Claims (1)

A seedling box transport device for transporting a seedling box in which a large number of pot seedling rooms are arranged along a seedling box transport path;
A missing plant sensor in a seedling transplanter equipped with a seedling extruding device that extrudes a predetermined number of pot seedlings from a seedling box at a predetermined extrusion position on the seedling box transport path,
An extrusion sensor for detecting the extrusion operation of the pot seedling in the seedling extrusion device, and a seedling box sensor for detecting the movement of the seedling box being conveyed by the seedling box conveyance device, wherein the extrusion sensor is a predetermined number of times of the extrusion. While detecting the operation, when the seedling box sensor does not detect the movement of a predetermined amount of seedling box, it is configured to issue an alarm,
The seedling box sensor rotates together with a seedling box sensor roller that is pivotally supported so as to roll when the outer periphery abuts against a bottom near the center in the width direction of the seedling box, and the seedling box sensor roller. A rotation plate provided; a through-hole provided at a fixed angle on the plate surface of the rotation plate; and a pair of photoelectric sensors for detecting the through-hole, through the rotation of the seedling box sensor roller; Configured to detect the movement of the seedling box,
The pair of photoelectric sensors is provided in such a positional relationship that when any one of the photoelectric sensors detects the through hole, the other photoelectric sensor does not detect the through hole. Missing sensor in the machine.

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