JPS6329376Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rice transplanter that is equipped with, for example, a planting section having a seedling stand and a planting claw, and performs rice transplanting work continuously. Conventionally, as shown in Utility Model Application Publication No. 56-24824,
There is a technology in which a plurality of switches are provided in the direction of seedling movement in a seedling stand, and the switches detect and display the amount of reduction in the number of seedlings.

However, since the above-mentioned conventional technology only displays the amount of seedlings used (the remaining amount of seedlings), it is possible to change the unit by changing the properties of the seedlings placed on the seedling stand or the number of seedlings to be taken out with the planting claw. The amount of seedlings planted per area was uneven, and there were problems in growth management, such as the inability to apply additional fertilizer properly and to easily obtain good seedling divisions.

However, the present invention provides a device equipped with a seedling quantity sensor that detects the quantity of seedlings on a seedling platform, and includes a seedling reduction rate detection means that detects the rate of decrease in seedlings on the seedling platform based on the output of the seedling quantity sensor; a planting speed detecting means for detecting the planting speed by the attached nail; a planting speed calculating means for calculating the planting speed based on each output of the seedling reduction speed detecting means and the planting speed detecting means; The present invention is characterized by being provided with a planting drive device in which the planting speed is automatically changed based on the output of the means.

Therefore, since the planting speed of the planting claws is automatically changed according to the rate of decrease of seedlings on the seedling stand, the number of seedlings to be taken out can be changed depending on the properties of the seedlings placed on the seedling stand or the number of seedlings taken out by the planting claws. Even if the rate of decline of seedlings on the seedling stand changes due to factors such as this, the amount of seedlings planted per unit area can be maintained approximately uniformly, and it is possible to improve the quality of seedlings after planting by optimizing topdressing and dividing good seedlings. Growth management can be performed more easily than before, and supplementary planting and thinning operations can be simplified, and yield rates can be easily improved.

Embodiments of the present invention will be described in detail below based on the drawings.

Fig. 1 is a schematic side view of the riding rice transplanter, and Fig. 2 is a plan view of the same. , 5 is a connecting frame that connects the front and rear car bodies 2, 3 so as to be bendable only in the horizontal direction via a rotation fulcrum shaft 6; Front and rear running wheels to be installed,
11 is a column whose base end is fixed to the front vehicle body 2; 12 is a preliminary seedling stand supported by the column 11; 13 is a driver's seat that is attached to the upper rear part of the front vehicle body 2 via the column 11; and 14 is a front vehicle body 2. 15 is an engine mounted on the rear vehicle body 3.

In addition, 16 in the figure is a planting part for six-row planting that is installed in the front part of the front vehicle body 2 via a three-point linkage mechanism 17 so as to be able to be raised and lowered, and 18 is a planting part for planting low front and rear high seedlings that can be moved back and forth from side to side. A mounting stand 19 is a planting claw for taking out one seedling from the seedling mounting stand 18 and planting it; 20 is a transmission case to which the seedling mounting stand 18 and the planting claw 19 are attached;
1 is a float supporting the transmission case 20, 22
2 is a front bumper attached to the transmission case 20;
3 is a fixed frame that supports each transmission case 20...
The seedling platform 18 and the planting claws 19 are appropriately driven via the PTO transmission shaft 24 to continuously plant seedlings.

As shown in FIG. 3, a pair of electrode plates 24 and 25, which are seedling quantity sensors, are attached and fixed on the upper surface of the seedling platform 18 substantially parallel to the direction of downward movement of the seedlings, and the seedlings are placed on the seedling platform 18. Each electrode plate 24, 25
The electrode plates 24 and 25 are brought into a conductive state through the seedling mat containing a large amount of moisture mixed with ionized chemical fertilizer, and each The electrode plates 24 and 25 are formed so that a decrease in the number of seedlings can be continuously detected by increasing the resistance value of the electrode plates 24 and 25.

A power supply 26 is connected to one of the electrode plates 24, and a seedling quantity detection circuit 27 is connected to the other electrode plate 25, and is a display element that continuously and sequentially displays changes in the quantity of seedlings on the seedling platform 18. Seedling amount meter 28
and a switch 30 that is linked to the meter 28 and displays the seedling succession period by lighting a lamp 29, and a buzzer 31 connected in parallel to the lamp 29 is connected to the circuit 27. be.

The present invention is constructed as described above, and moves at a substantially constant speed, and the seedlings on the seedling platform 18 are successively planted at equal intervals at a substantially constant speed by the planting claws 19. Electricity is established between the electrode plates 24 and 25 through the seedlings mounted on the stand 18, and the resistance value between the electrode plates 24 and 25 increases in proportion to the decrease in seedlings, which is measured by the meter 28. The system detects the amount of seedlings and continuously displays the decreasing amount of seedlings, and also notifies the time of seedling succession using a lamp 29 and a buzzer 31 via a switch 30 that is linked to the meter 28.

Furthermore, FIG. 4 shows another embodiment, in which, in place of the meter 28 of the above embodiment, a plurality of variable resistors 32 whose resistance values are different in stages, and a display connected to each resistor 32, are used. Element lamp 33
... is provided in the seedling amount detection circuit 27', and each lamp 33... is sequentially turned off as the amount of seedlings on the seedling stand 18 decreases, and the number of seedlings is displayed by the lit lamps 33... A buzzer 31' is connected to the circuit 27', which is turned on when the lamp 33 in front of the lamp 33 indicating the amount of seedlings at the time of seedling succession is turned off. The variable resistor 32... is adjusted in advance, and each lamp 3
3 continuously displays the amount of seedlings on the seedling stand 18, and also sounds the buzzer 31' to notify the time for seedling succession.

In each of the above embodiments, even if the bottom surface of the seedling pine is partially recessed, the electrode plates 24 and 25 are brought into continuous surface contact with the bottom surface of the seedling pine, so that the seedling pine does not float in extreme places. It is possible to accurately detect the amount of remaining seedlings.

Furthermore, FIG. 5 is a block diagram showing another embodiment, in which a seedling amount measuring circuit 34 including a pair of electrode plates 24 and 25 attached substantially parallel to the seedling stand 18 is shown.
and the electrode plate 2 in proportion to the amount of seedlings on the seedling stand 18.
A seedling reduction speed detection circuit 35 is a seedling reduction speed detection means that detects the current change between 4 and 25, and a seedling amount display circuit 36 is a display element that digitally displays the continuously decreasing amount of seedlings on the seedling platform 18. As in the above embodiment, the amount of seedlings on the seedling platform 18 is continuously displayed, which decreases continuously. In addition, a planting speed sensor 39 includes a detection gear 37 that is constantly rotated in conjunction with the planting claw 9 and an electromagnetic pick-up 38 that measures the rotational speed of the gear 37, and The amount of seedlings to be planted per unit area is set by comparing the outputs of the planting speed detection circuit 40, which is a planting speed detection means for detecting the speed, with the seedling reduction speed detection circuit 35 and the planting speed detection circuit 40. A planting amount calculation circuit 41 that calculates whether the value is equal to the value, and the circuit 4
A planting speed calculation circuit 42, which is a planting speed calculation means for calculating the planting speed by the planting claw 19 based on the calculation output of the amount of seedlings planted in step 1, and conical pulleys 43, 44.
A continuously variable transmission 46 including a transmission belt 45 is incorporated into the drive system between the engine 15 and the transmission case 20, a continuously variable transmission lever 47 is interlocked with a servo motor 48, and a potentiometer 49 is provided on the lever 47. and a planting drive device 50 that feeds back the speed change position to the circuit 42 via the planting drive device 50. Then, at the same time, the speed of seedling reduction on the seedling platform 18 is detected via the electrode plates 24 and 25, and the driving speed of the planting claw 19 is measured to detect the planting speed, and the seedling platform 18 is continuously decreased. The amount of seedlings is continuously displayed by the amount of seedlings display circuit 36.
1 and 42, the seedling reduction speed and the planting speed are compared, and the servo motor 48 is driven to a planting speed position corresponding to the seedling reduction speed, and the continuously variable speed lever 47 is shifted. When the seedling pine is easy to fall and descends quickly, the driving speed of the planting claw 19 is increased. For example, when the seedling pine is relatively hard or the seedling has good rooting and descends slowly, the driving speed of the planting claw 19 is increased. As described above, the planting speed is adjusted according to changes in the amount of seedlings supplied to the planting claws 19, and the amount of seedlings planted per unit area is made approximately uniform.

As is clear from the above embodiments, the present invention provides a device equipped with seedling amount sensors 24, 25 for detecting the amount of seedlings on the seedling platform 18.
A seedling reduction speed detection means 35 that detects the reduction speed of seedlings on the seedling platform 18 based on the output, and a planting speed detection means 40 that detects the planting speed of the planting claws 19.
Seedling reduction speed detection means 35 and planting speed detection means 40
A planting speed calculation means 42 that calculates the planting speed based on each output of the planting speed calculation means 42 and a planting drive device 50 that automatically changes the planting speed based on the output of the planting speed calculation means 42 are provided. Since the planting speed of the planting claws 19 is automatically changed according to the rate of decrease of seedlings on the seedling platform 18, the planting speed of the planting claws 19 is automatically changed depending on the properties of the seedlings placed on the seedling platform 18 or the planting claws 19. Even if the rate of decline of the seedlings on the seedling table 18 changes due to changes in the number of seedlings to be taken out, the amount of seedlings planted per unit area can be maintained approximately uniformly, and it is possible to optimize top-dressing and to divide good seedlings. It has practical effects such as making it easier to manage the growth of seedlings after planting than before, simplifying supplementary planting and thinning work, and easily improving harvest rates. be.

[Brief explanation of the drawing]

Fig. 1 is a side view of a riding rice transplanter equipped with a seedling stand device according to the present invention, Fig. 2 is a plan view thereof, Fig. 3 is an operational system diagram of the main parts, and Fig. 4 shows another embodiment. FIG. 5 is a block diagram showing another embodiment. 18... Seedling mounting stand, 24, 25... Electrode plate (seedling quantity sensor), 28... Seedling quantity meter (display element), 33
... Lamp (display element), 36... Seedling amount display circuit (display element).

Claims (1)

[Scope of utility model registration request] a seedling amount sensor 24 that detects the amount of seedlings on the seedling platform 18;
25, the seedling amount sensor 2
A seedling reduction speed detection means 35 detects the reduction speed of the seedlings on the seedling platform 18 based on the outputs of 4 and 25, a planting speed detection means 40 detects the planting speed by the planting claws 19, and a seedling reduction speed detection means a planting speed calculation means 42 that calculates the planting speed based on the outputs of the means 35 and the planting speed detection means 40;
A rice transplanter characterized by being provided with a planting drive device 50 whose planting speed is automatically changed based on the output of the rice transplanter.