JPH0119841B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a detection device for detecting an abnormality in the vertical feeding of seedling pine on a seedling table of a rice transplanter and the timing for adding seedling pine.

[Problems to be solved by conventional technology/invention]

In general, rice transplanters are equipped with a seedling platform that can freely reciprocate from side to side, as well as a mechanism that vertically feeds the seedlings on the platform downwards. The plant is divided into individual plants and planted in the field. but,
If the seedling mats stick strongly to the seedling stand, or on the other hand float up,
The vertical feeding of seedling pine may not be carried out or the amount of vertical feeding may be reduced, which often causes problems such as missing plants or planting with a small amount of seedlings, and delays in adding seedling pine. In some cases, stock shortages occurred.

Regarding this point, Utility Model Application No. 50-97918,
It has been proposed that a rotary detector be brought into contact with the back side of the seedling pine, and the amount of seedling removal can be adjusted according to the amount of vertical feed of the seedling pine detected by the detector. If the detection object is only a small amount, there is a concern that the detecting object may cause harmful effects such as inhibiting the vertical feeding function of the seedling pine.

The present invention makes it possible to reliably and easily detect abnormalities in vertical feeding, such as whether or not the seedling pine is actually being fed vertically, without interfering with the vertical feeding of the seedling pine. The purpose of this system is to check the timing of splicing pine, to prevent the occurrence of missing plants in the field, and to prevent a decrease in the number of seedlings per plant.

[Means for solving problems]

In order to achieve this object, in the present invention, a seedling platform is mounted on the traveling machine so as to be able to reciprocate in the lateral direction, and a feed claw is provided at the bottom of the seedling platform that protrudes toward the top side of the seedling platform. In a rice transplanter equipped with a seedling mat vertical feeding mechanism having a wheel, the seedling mounting table includes a detection wheel that contacts the back surface of the seedling mat at a position a suitable distance above the feed pawl wheel in the seedling mat vertical feeding mechanism. A detection body is provided, and the detection wheel in the detection body and the feed pawl wheel in the seedling pine vertical feeding mechanism are shifted in the left-right direction with respect to the vertical feeding direction of the seedling pine, while the detection wheel in the detection body is The diameter is smaller than the diameter of the feed pawl wheel in the seedling pine vertical feeding mechanism.

〔Example〕

Next, an embodiment in which the present invention is applied to a 6-row riding rice transplanter will be described based on the drawings. ′ and brackets 5 and 4′ that protrude upward and downward from the front end of the rear fuselage 3 are pivoted on the same vertical line with pins 6 and 7, thereby showing a traveling fuselage that can be horizontally bent. Axle cases 8, 9 are attached to the left and right sides of the wheel 3, and wheels 12, 13 are attached to the tips of the axle cases 8, 9 via swing arms 10, 11 which are rotatable and biased downward by springs. It is installed.

Reference numeral 14 indicates the engine mounted on the rear end of the rear fuselage 3; reference numerals 15 and 16 indicate the connecting pins 6;
By transmitting the power from the engine 14 to the power transmission mechanisms in the front and rear fuselages 2 and 3 via the bendable universal joint shafts 15 and 16, Front and rear wheels 12,
13, and power is transmitted from a PTO shaft 17 protruding from the front end of the front body 2 to an input shaft 19 of a seedling planting device 20, which will be described later, via a telescopic joint shaft 18.

In addition, a handle 21 provided on the top surface of the front fuselage 2
The steering mechanism is connected to the rear fuselage 3 by a connecting rod 23, and the steering mechanism is constructed so that the front and rear fuselage can be bent and steered by rotating the handle 21.

Reference numeral 20 denotes a six-row seedling planting device disposed in front of the front body 2, and the seedling loading device 20 includes a transmission case 24, seedling planting claws 25 attached to both ends of the transmission case 24, and Upper and lower rails 22, 29 on the top surface of
The seedling loading unit consists of three seedling loading units, each consisting of a seedling loading stand 26 which is attached horizontally movably through the transmission case 24 and a float 27 which is attached to the lower surface of the transmission case 24. and is configured to be vertically movable with respect to the fuselage 1 via a top link 46 and a lower link 47.

Each cylindrical member 2 that connects each transmission case 24
The power transmission shaft 30 is inserted into each transmission case 24 from the drive shaft of the transmission case 24 located in the center.
The chain 31 is transmitted to a transmission mechanism 32 inside, and power is transmitted to the claw shafts 33 via the transmission mechanism 32, thereby swingingly driving the seedling planting claws 25 attached to the tips of each claw shaft 33.

Reference numeral 34 denotes a seedling platform transverse feed mechanism attached to the rear end of the transmission case 24 located at the center, and a chain 35 and a transmission mechanism 36 are connected from the drive shaft of the transmission case 24 to the rear end of the transmission case 24 located at the center.
The power is transmitted to the cylindrical camshaft 37 via
A boat-shaped key 39 attached to a slidable horizontal feed shaft 38
, the reciprocating spiral groove 3 in the cylindrical camshaft 37
7', the cylindrical camshaft 37
With the rotation of The cams 62, 62' fixed to the levers 63, 62' on the transverse feed shaft 38
63' so that the horizontal feed shaft 38 is swing-rotated by a certain angle.

Further, on the back surface of the seedling platform 26, both ends of the horizontal feed shaft 38 are connected via a bracket 41, and seedling mat feed ratchet wheels 42, which partially protrude from the surface of the seedling platform 26, are installed at appropriate intervals. A one-way feed clutch 44 provided on the vertical feed shaft 43 is connected to the horizontal feed shaft 38 via a connecting rod 45, and the seedling pine vertical feed shaft 43 is connected to the horizontal feed shaft 38 at the left and right ends of the horizontal feed. The feed shaft 43 is intermittently fed one pitch at a time to feed the seedling pine 40.
A seedling mat vertical feeding mechanism configured to feed the seedling mat toward the lower end of the seedling platform 26 is provided.

Reference numeral 48 denotes a seedling pine detection body provided appropriately above the vertical feed shaft 38 on the back surface of the seedling platform 26, and the seedling pine detection body 58 is rotatably supported on the back surface of the seedling platform 26. It consists of a shaft 51 and one or more detection wheels 49 attached to the shaft 51 in a sawtooth shape, a gear shape, or a needle body implanted on the outer periphery, and a part of the detection wheel 49 in the detection body 48 is By protruding from a hole 50 protruding from the plate surface above the vertical feed shaft 43 of the seedling platform 26 and making contact with or biting into the back surface of each seedling mat 40, the seedling mat 40 is moved vertically. Configure it so that it rotates along with it.

In this case, as shown in FIG. Seedling Matsuto 40
The contact portion of each feed ratchet wheel 42 and the contact portion of each feed ratchet wheel 42 to the seedling pine 40 are configured so that they are different from each other, and the diameter of each detection wheel 49 is set to be different from that of each feed rattle wheel 42.
It is formed to have a diameter smaller than that of No. 2.

Further, a rotor 64 having magnets arranged at intervals corresponding to the vertical feed amount of each seedling mat 40 is fixed to the shaft 51 of the seedling mat detector 48, and each rotor 64 is attached to the back surface of the seedling stand 26. A vertical feed confirmation switch 52 is provided adjacent to the vertical feed confirmation switch 52.

Reference numerals 53 and 53' denote left and right movement end confirmation switches, such as a pair of right and left micro switches, which are provided at an appropriate distance from each other on the back side of the seedling table 26.
moves to the right or left by a distance (L), the cylindrical member 28
An operating pin 54 protruding from a fixed portion of the transmission case 24 or the like is configured to be turned on when it comes into contact with the right or left lateral movement confirmation switch 53, 53'. Further, reference numeral 55 indicates the seedling planting device 20
These are alarm devices such as buzzers and lamps installed at appropriate locations.

These include the seedling pine detection mechanism 48, the left and right movement confirmation switches 53 and 53', and the alarm 55.
are interconnected by an electric circuit, and wired so that an alarm is issued when the seedling pine 40 on the seedling table 26 does not actually move downward, that is, when it does not move vertically or when the vertical feeding amount is less than a predetermined value. .

For example, in the electric circuit 56 shown in FIG. 5, one input terminal 58 of the detection circuit 57 is connected to the seedling stand 26.
The left and right moving end confirmation switches 53 and 53' are connected in parallel, and the other input terminal 59 is connected to each seedling pine 4.
vertical feed confirmation switch 52 for confirming vertical feed of 0;
52... are connected in series, while the detection circuit 57
The output terminal 60 is connected to an output circuit 61, and the output circuit 61 is connected to the alarm 55.

In this detection circuit 57, the left/right moving end confirmation switch 5 is activated at the right or left moving end of the seedling platform 26.
3, 53' is turned on, signals from every 40 locations of each seedling pine enter one input terminal 58, and the detection circuit 57 is activated for a certain period of time, and within that activation time, If no input signal enters the other input terminal 59, the detection circuit 57
A signal is output from the output terminal 60 of the output terminal 60 to activate the output circuit 61, so that the alarm 55 is activated, and conversely, a signal is input to the one input terminal 58, and
If a signal is input to the other input terminal 59 within a certain period of time, the signal at the one input terminal 58 is reset and no signal is output from the output terminal 60 of the detection circuit 57, so that the alarm 55 is not activated. That's what I do.

In the above configuration, when the seedling mats 40 are placed in parallel on the surface of the seedling platform 26 and power is transmitted to the input shaft 19 of the seedling planting device 20 while moving the traveling body 1 forward, the seedling planting claws 25 are moved to the seedling platform 26. The seedling table 26 swings back and forth between the seedling take-out port at the lower end of the 26 and the field surface, and in synchronization with this, the seedling platform 26 moves laterally one pitch at a time, and each seedling pine 4
The seedlings are divided into individual plants from 0 and planted in the field, and the seedling stand 26 is the width of the seedling pine 40 (L).
When the vertical feed mechanism rotates the feed pawl wheel 49 by a certain angle, the feed pawl wheel 49 forcibly moves the seedling pine 40, which has bitten into the lower soil, by a certain distance toward the lower end of the seedling platform. let

At this time, the operating pin 54 turns on the right moving end confirmation switch 53 on the back of the seedling table 26, and the signal is input to the input terminal 58 of the detection circuit 57, but at this time each seedling mat 40 is vertically fed by a predetermined distance. Then,
The detection body 48 that is in contact with the back side rotates together, the vertical feed confirmation switches 52... are turned on all at once, a signal is input to the other input terminal 58 of the detection circuit 57, and the detection circuit 57 is reset. Since no output signal is output, the alarm 55 is not activated.Similarly, the alarm is also activated when all the seedlings 40... are actually vertically fed by a predetermined amount at the end where the seedling platform 26 has moved to the left. 55 does not operate.

Then, if the number of seedling mats 40 remaining on the seedling platform 26 is running low and it sticks strongly to the seedling platform 26, or conversely, the seedling mats 40 are floating from the surface of the seedling platform 26, some seedling mats 40 may be removed. When the detection body 48 does not actually move vertically, the detection body 48 on the back side does not rotate. Therefore, among the vertical feed confirmation switches 52 connected in series, the corresponding switch 52
does not operate, the input terminal 58 of the detection circuit 57
If no signal is received, the output circuit 61 is activated by the output signal of the detection circuit 57, and the buzzer of the alarm 55 continues to sound or the lamp lights up, thereby notifying the operator of the vertical feed failure. .

Also, if one or more of the seedling mats 40 placed in parallel on the seedling table 26 has a small vertical feed amount, in other words, if the vertical feed amount is less than a predetermined vertical feed amount, , the rotation of the detection body 48 at that point is small, so the vertical feed confirmation switch 52 is
Since it cannot be turned ON, an alarm will be issued in the same way as above.

Then, when one or more of the seedling pine 40 of the seedling pine on the seedling table 26 is running low and the end of the seedling pine 40 passes past the 48 detection objects, the detection object 48 will point the seedling pine 40 downward. As the seedling pine 40 stops rotating at the same time, a warning is issued in the same manner as described above, and the time to add seedling pine is notified before all the seedling pine 40 are used up.

In addition, in order to be able to independently detect abnormalities in the vertical feeding of the seedling pine at each seedling pine location, a detector and an alarm may be provided independently for each location, and furthermore, a detection body and an alarm may be provided for each location. When the vertical feeding of the seedling pine is not detected by the signal, in other words, if there is an abnormality in the vertical feeding of the seedling pine, the rice transplanting operation can be automatically stopped. Furthermore, in the above-described embodiment, if the detection of an abnormality in the vertical feeding of seedling pine is too sensitive, an alarm may be issued when the signal from each detection object is interrupted twice.

[Action/effect of the invention]

As described above, since the present invention has the configuration as described in the claims, it achieves the functions and effects described below.

When detecting the vertical feed amount of the seedling pine on the seedling platform using a detection body that rotates together with the back side of the seedling pine, the detection body with a detection wheel is connected to the feed pawl wheel in the seedling pine vertical feeding mechanism. By placing the seedling pine at an appropriate distance above the pine, it is possible to automatically instruct when to add seedling pine before the seedling pine can no longer be fed vertically by the seedling pine vertical feeding mechanism. Since the addition of seedlings can be carried out with sufficient time, it is possible to reliably prevent the occurrence of stock shortages until the addition of seedling pine.

By shifting the detection wheel in the detection body and the feed pawl wheel in the seedling pine vertical feeding mechanism in the left-right direction with respect to the vertical feeding direction of the seedling pine, the feeding pawl wheel in the seedling pine vertical feeding mechanism is
Since the rear surface of the seedling pine will come into contact with a portion of the rear surface of the seedling pine that is not touched by the detection wheel located above the feed wheel, that is, a portion that is not dented by contact with the detection wheel, the feed wheel The vertical feeding of the seedling pine can be reliably carried out without being obstructed by the detection wheel.

In other words, the vertical feeding of the seedling pine can be reliably detected without inhibiting the vertical feeding function of the seedling pine.

Since the diameter of the detection wheel in the detection body is made smaller than the diameter of the feed pawl wheel in the seedling pine vertical feeding mechanism, the vertical feed amount of the seedling pine by the feeding pawl wheel can be amplified and detected. Quantity detection accuracy can be improved.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a side view of a 6-row rice transplanter, Fig. 2 is a plan view thereof, Fig. 3 is an enlarged side view of the seedling planting device, and Fig. 4 is a seedling transplanter. FIG. 5 is a partially cutaway sectional view of the power transmission section of the device, FIG. 5 is a perspective view taken along the line 3 in FIG. 3, and FIG. 6 is a block diagram of the electric circuit. DESCRIPTION OF SYMBOLS 1... Traveling machine body, 20... Seedling planting device, 26... Seedling stand, 43... Vertical feed shaft, 42... Feed pawl wheel, 48... Detection body, 49... Detection wheel, 52... Vertical feed confirmation switch, 55... Alarm device , 57...detection circuit.

Claims (1)

[Claims] 1. A seedling platform is mounted on the traveling machine so that it can be moved back and forth in the horizontal direction, and a seedling mat vertical feeding mechanism is provided at the bottom of the seedling platform, which has a feed pawl wheel that protrudes from the top side of the seedling platform. In the rice transplanter, the seedling platform is provided with a detection body equipped with a detection wheel that comes into contact with the back surface of the seedling pine at a position an appropriate distance above the feeding pawl wheel in the seedling pine vertical feeding mechanism, The detection wheel in the detection body and the feed pawl wheel in the seedling pine vertical feeding mechanism are shifted in the left-right direction with respect to the vertical feeding direction of the seedling pine, while the diameter of the detection wheel in the detection body is set to A seedling pine detection device in a seedling stand of a rice transplanter, characterized in that the diameter is smaller than the diameter of a feed pawl in the mechanism.