JPS6310716Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is based on the above-mentioned riding rice transplanter that is equipped with an auxiliary spring that biases and supports the planting part, which is supported by a three-point link so as to be movable up and down, upward in the working position. An auxiliary spring device including an auxiliary spring,
It is related to

In a riding rice transplanter that is equipped with a float that only supports the planting section from below without using the float to support the machine body, if the above-mentioned auxiliary spring is not installed, the planting section will be Since the plant is supported only by the float at the working position, the planting condition is unstable, and as a result,
The above-mentioned auxiliary spring is provided to support the planting part in the working position by pulling it upwards, and the seedlings are planted while supporting the planting part by the float and this auxiliary spring. It is done so as to obtain a planted condition.

The purpose of this invention is to provide an auxiliary spring device for stably planting seedlings by compensating for fluctuations in the weight of the planting section due to fluctuations in the amount of seedlings on the seedling platform of the planting section. The object of the present invention is to provide a new auxiliary spring device for a riding rice transplanter, which can perform the above-mentioned compensation very accurately.

Regarding the illustrated embodiment, the configuration of the auxiliary spring device in the riding rice transplanter according to this invention will be explained as follows.
As shown in Figure 1-3, a support made of pipe material is attached to the rear of the riding tractor-type machine T by one upper top link 1 and a lower pair of left and right lower links 2. The frame F is connected in a vertically movable manner, and the planting part P is connected to the gate-shaped rising frame part 3 at the front end of the support frame F by one top link 4 in the upper part and a pair of left and right lower links 5 in the lower part. Connected so that they can be raised and lowered, the planting part P can be moved by this machine T.
This invention has been implemented in the following manner in a riding rice transplanter configured to carry out rice planting work by driving the machine body in a flooded field while towing the rice transplanter.

That is, the above-mentioned planting part P is, as usual,
A planting section transmission 6, a seedling stand 7 that is moved laterally and reciprocated by the planting section transmission 6, a planting arm 8 that is moved up and down, and a float that receives and supports the planting section P from below. 9, etc., but a pair of left and right auxiliary springs 10 are stretched between the machine T and the support frame F to support the support frame F by pulling it upward. , A pair of left and right auxiliary springs 11 are also provided between the support frame F and the planting part P to support the planting part P by pulling it upward, and the auxiliary springs 11 including this latter auxiliary spring 11 The spring device is constructed as follows according to this invention.

That is, a support frame 14 consisting of left and right plates is provided, fixedly supported by pipes 12 and 13 installed horizontally in the rising frame portion 3 of the support frame F.
The base ends of the left and right auxiliary springs 11 are connected to the support frame 14 described above.
It is attached to left and right curved arms 16a of a mounting frame 16 that is rotatably supported around a fulcrum pin 15 extending in the left-right direction. A winch consisting of a reversible motor 17 and a winch drum 18 rotationally driven by the motor 17 is installed at the top end of the rising frame portion 3 of the support frame F. Arm 1
The wire 19 with one end fixed to the wire 6a is wound around the above-mentioned winch drum 18, and the mounting frame 16, which is formed by fixedly connecting the left and right curved arms 16a with a connecting rod 16b, is connected to the winch drum by the reversible motor 17. When the wire 19 is wound up and rolled out by the rotational drive of the wire 18, the wire 19 is rotated downward as shown by the solid line in FIG. 1, and in an upward position as shown by the chain line in FIG. It is configured such that it can be rotated around the fulcrum pin 15 to any position between the rotated position and the rotated position. In addition, in the case of illustration,
As shown in FIGS. 2 and 3, the tips of the left and right auxiliary springs 11, which are provided in a widening shape toward the tip side, are supported rotatably around a fulcrum pin 20 along the front-rear direction in the planting section transmission 6. It is fixed to one arm 21a end of the left and right bell cranks 21, and the other arms 21b of the left and right bell cranks 21 are connected by an interlocking rod 22.

The illustrated riding rice transplanter is for planting in 6 rows, and the upper surface of the seedling platform 7 in the planting part P corresponds to the width direction, and as shown in FIG.
It is divided into row seedling loading section 7A. In addition, in the illustrated riding rice transplanter, as shown in Fig. 1,
A preliminary seedling loading stand 26 is supported by the seedling loading stand 7 via upper and lower support links 24 and 25 and installed above the upper surface of the seedling loading stand 7, and has a preliminary seedling stocking posture shown in solid lines in FIG. From there, the seedling splicing end is lowered to the seedling splicing position shown by the chain line, in which it is largely inclined toward the upper surface of the seedling table 7, and in this seedling splicing position, the seedling stopper 26a at the seedling splicing end is opened and rotated upward. A spare seedling platform 26 is provided for supplying spare seedling mats onto the seedling platform 7. The auxiliary seedling trays 26, which have the same width as the seedling trays 7, are provided in three sets in parallel, one set for two rows.
As shown in Fig. 2, the spare seedling stand 26 of each set
By the vertical ribs 27 on both sides and the vertical rib 28 in the center,
Six rows of preliminary seedling platform sections 26A are defined.
The vertical width of the illustrated seedling loading stand 7 is 7A for each seedling loading section.
The dimensions are such that two seedling mats can be placed in series, and the vertical width of the preliminary seedling loading stand 26 is set to fit each seedling loading section 26.
The dimensions are set so that one seedling pine can be placed on A, but as shown in FIG. Two sensor switches S ₁ and S ₂ are installed at two appropriate positions, and one sensor switch S ₃ is installed at an appropriate position in every other row of the seedling loading section 26A of the preliminary seedling loading stand 26. be.

As shown in FIG. 4, each sensor switch S ₁ , S ₂ , S ₃ is fixedly installed below a window hole 29 formed in the seedling platform 7 or the preliminary seedling platform 26.
An actuating arm 30 is provided that can elastically protrude above the window hole 29. Each sensor switch S ₁ ,
In the case shown, S ₂ and S ₃ are movable contacts by the actuating arm 30 in a state where the actuating arm 30 is pushed by the seedling pine M and the protruding movement of the actuating arm 30 is prevented as shown in FIG. 31 is pressed to turn on, and conversely, when the seedling pine M comes out of the window hole 29 position and the operating arm 30 moves to protrude, the movable contact 3
When the pressure of 1 is released, the switch is turned off.

As shown in FIG. 5, upper and lower sensor switches S ₁ ,
Of S ₂ , the upper sensor switch S ₂ is a resistor.
Ra, and the lower sensor switch S ₂ is a resistor.
Each is connected in series with _R6 . Further, each sensor switch _S3 arranged every other row of the seedling loading section 26A of the preliminary seedling loading stand 26 is connected in series to a resistor Rc. And each set S ₁ of the above sensor switches S ₁ , S ₂ , S ₃ and resistors Ra, Rb, Rc,
By connecting Ra, S ₂ , Rb, S ₃ and Rc in parallel, sensor switches S ₁ , S ₂ and S ₃ are installed on the seedling stand 7 and the preliminary seedling stand 26 depending on the presence or absence of the seedling pine M. A seedling amount detector D that increases or decreases the resistance value is configured.

Similarly, as shown in FIG. 5, depending on the variable resistance type seedling amount detector D, two variable resistances R ₁ ,
Together with _R2 and one fixed resistor _R3 , a bridge circuit is configured, and this bridge circuit is connected to a battery _B1 constituting a power source via a voltage regulator VS. A relay circuit is connected to the above bridge circuit via an amplifier AM, and this relay circuit includes two relays RS ₁ ,
RS ₂ is assembled. The two variable resistors mentioned above
Of R ₁ and R ₂ , the variable resistor R ₁ is provided so that its resistance value can be varied by the reversible motor 17, as shown in FIG. It is said that the resistance value increases or decreases as the resistance moves up and down. In addition, the resistance value of the other variable resistor _R2 can be adjusted by manual operation.

Based on the above, the resistance value of the seedling amount detector D is Rd,
If the values of each resistance R ₁ , R ₂ , R ₃ are R ₁ , R ₂ , R ₃ ,
The above bridge circuit does not allow current to flow to the relay circuit when Rd×R ₂ =R ₁ ×R ₃ (1), and when this equilibrium relationship no longer holds, current flows to the relay circuit. , diodes D ₁ and D ₂ are connected in series to the above relays RS ₁ and RS ₂ , respectively, and
When current is output in the direction of arrow A, only relay RS ₁ is used, and when current is output in the direction of arrow B, relay RS 1 is used only.
so that only RS ₂ is activated, respectively.
There is a plan. As is clear from the above description, the seedling amount detector D detects the amount of seedling pine in each seedling loading section 7A on the seedling loading table 7 and the seedling loading section 26A for the second row on the preliminary seedling loading table 26. The overall amount of seedlings on the seedling platform 7 and the preliminary seedling platform 26 is detected by varying the resistance value depending on the presence or absence of the preliminary seedling pine in the bridge circuit. If the amount of pine seedlings detected as a whole increases and the equilibrium relationship in equation (1) breaks down,
If current flows in the direction of arrow A to activate relay RS ₁ , and conversely the amount of seedlings detected as a whole decreases and the equilibrium relationship in equation (1) is broken, arrow B
It is said that the current flows out in the direction to activate relay RS ₂ .

The reversible motor 1 moves up and down the mounting frame 16 to which the base ends of the left and right auxiliary springs 11 are attached.
7, its operation is controlled by a control circuit as shown in FIG. This control circuit includes a battery B ₂ that constitutes the power supply, and the relays RS 1 and RS ₁ described above.
Relay switches SW ₁ and SW ₂ are incorporated in which the movable contacts are switched and displaced (hereinafter referred to as ON operation) by the operation of RS ₂ , and the ON operation of relay switch SW ₁ causes the motor 17 to close to the mounting frame. The relay switch SW 2 is connected to the battery B ₂ so that it can be rotated in a direction in which the base end position of the auxiliary spring 11 is raised by rotating the auxiliary _spring 16 upward.
The motor 17 is connected to the battery B ₂ so that the motor 17 is rotated in a direction in which the mounting frame 16 is rotated downward and the base end position of the auxiliary spring 11 is lowered. In the illustrated case, the mounting frame 16 is supported by the support frame 14 as shown in FIG. 3 and rotated upward to the position shown by the chain line in FIG. When the movable contact is moved from the fixed contact a to the other fixed contact b
Upper limit detection limit switch LS ₁ that can be switched to
and a lower limit detection limit switch _LS2 which switches the movable contact from the fixed contact a to another fixed contact b when the mounting frame 16 is rotated downward to the position shown by the solid line in FIG. These limit switches LS ₁ and LS ₂ are also incorporated into the control circuit shown in FIG. That is _, as shown in FIG. 6, when the limit switches LS ₁ and LS ₂ are switched to the fixed contact b side with the respective relay switches SW _{1 and} SW ₂ in the ON state, the motors are turned off. It is incorporated into the control circuit in conjunction with diodes D ₃ , D ₄ which interrupt the current conduction to 17 .

In Fig. 1, 33 is the rear wheel of this machine T;
4 is a passenger seat of this machine T, 35 is a hydraulic lift arm provided on this machine T, and 36 is this hydraulic lift arm 3.
a tie rod connecting 5 to the lower ring 2, 3;
7 is a flexible transmission shaft mechanism that transmits power from the machine T to the planting section P.

As described above, rice planting work using the illustrated riding rice transplanter is carried out in the usual manner by the planting part P while the machine T tows the planting part P together with the support frame R to move the machine body. During this rice planting work, the illustrated auxiliary spring device ensures stable rice planting work in the following manner.

That is, when the overall amount of seedlings on the seedling platform 7 and the preliminary seedling platform 26 of the planting section P increases or decreases,
In the circuit shown in Fig. 5, the resistance value of the seedling amount detector D increases or decreases, and when the amount of seedlings increases, a current flows in the direction of arrow A and relay RS ₁ is activated, and conversely, when the amount of seedlings decreases, the arrow Current flows in direction B, activating relay _RS2 . Therefore,
In the control circuit shown in Fig. 6, when the amount of seedling pine increases, the relay switch SW ₁ is turned on, and the reversible motor 17 is rotated in the direction of rotating the mounting frame 16 upward, and conversely, the amount of seedling pine decreases. At times, the relay switch SW ₂ is turned on, causing the reversible motor 17 to rotate in a direction that rotates the mounting frame 16 downward. As the motor 17 rotates, the mounting position of the base end of the auxiliary spring 11 on the mounting frame 16 is raised or lowered, and the spring force of the auxiliary spring 11 is increased or decreased. In the circuit shown in FIG. 5, the motor 1 that moves the mounting frame 16 up and down as described above is
7 Variable resistor R ₁ that increases or decreases the resistance value in conjunction with rotation
is stopped when the resistance value increases or decreases and the equilibrium relationship of equation (1) is established again. That is, at this point, the current flowing in the direction of arrow A or arrow B in the circuit shown in Figure 5 disappears, so the relay RS ₁ or
RS ₂ has now assumed the inactive state, and therefore the 6th
In the control circuit shown in the figure, the relay switch SW ₁ or SW ₂ , which had been on until then, is turned off, and the current conduction to the reversible motor 17 is eliminated.
will stop.

In this way, in response to fluctuations in the amount of seedlings on the seedling platform 7 and the preliminary seedling platform 26, when the amount of seedlings is large, the base end of the auxiliary spring is positioned upward, and the spring force of the auxiliary spring 11 is increased. On the other hand, when the amount of seedling pine is small, the base end position of the auxiliary spring 11 is positioned downward and the spring force of the auxiliary spring 11 is made small. Depending on the amount of seedlings on the seedling table 7 and the preliminary seedling table 26, the force is automatically changed to high when there are many and to small when there are few. And, the planting part P is
The more the amount of seedlings on the seedling tray 7 and the preliminary seedling tray 26, the more they will sink, and the less the amount of seedlings, the more they will float. Since the upward force applied to the planting part P is increased or decreased, even if the amount of seedlings changes, the vertical position of the planting arm 8 relative to the field surface in the planting part P is always constant, resulting in a constant planting depth. As a result, stable rice planting work will be carried out that will yield the desired results.

Note that when the base end position of the auxiliary spring 11 is raised or lowered to the rise permissible end or the fall permissible end due to the vertical movement of the mounting frame 16, the upper limit detection limit switch LS ₁ is activated in the control circuit shown in FIG. Alternatively, the lower limit detection limit switch _LS2 is switched to the fixed contact b side, and as described above, the current conduction to the motor 17 is cut off, and the motor 17 is stopped, thereby ensuring safety. Further, by adjusting the resistance value of the variable resistor _R2 whose resistance value is changed and adjusted by manual operation, the vertical position of the planting arm 8 can be adjusted according to field conditions and the like.

In the illustrated case, the tips of the left and right auxiliary springs 11 are fixed to the left and right bell cranks 21 as described above, and the left and right bell cranks 21 are connected by the interlocking rod 22, so that the left and right auxiliary springs The spring force of the springs 11 balances itself by mutually changing the tip positions of the left and right auxiliary springs 11 by interlocking rotation of the left and right bell cranks 21.

As is clear from the above explanation, the auxiliary spring device in the riding rice transplanter of this invention is the planting part P supported vertically movably by the three-point links 4 and 5.
In a riding rice transplanter equipped with an auxiliary spring 11 that biases and supports the auxiliary spring 11 upward in a working position, a driving means 17 that changes the base end position of the auxiliary spring 11 to change the biasing force of the auxiliary spring 11; 18,
Sensor switches S ₁ and S ₂ are provided at appropriate positions in the seedling loading section 7A of each row of the planting section seedling loading stand 7 to detect the presence or absence of each row seedling pine M at the position.
A seedling loading section 7 for each row of the planting section seedling loading table 7 is provided between these sensor switches S ₁ and S ₂ and the driving means.
The auxiliary spring 11 is connected so that the biasing force of the auxiliary spring 11 can be increased or decreased in accordance with the increase or decrease in the amount of seedlings in A, and the amount of seedlings on the seedling table in the planting section can be directly adjusted. This method detects and compensates for changes in the weight of the planted area due to changes in the amount of seedlings by adjusting the auxiliary spring force, making it possible to achieve accurate compensation that is not affected by field conditions. It is said that rice planting work is always carried out in a stable manner. In addition, since the means for detecting the amount of seedlings is configured as a sensor switch, the auxiliary spring device of this invention has the problem of a dead zone compared to those equipped with a detecting means such as a potentiometer. In comparison, the control mechanism is operated reliably by turning on and off the sensor switch, and the problem of dead zone, which is the bottleneck of automatic control, does not occur.

[Brief explanation of drawings]

Fig. 1 is a side view of the main parts of a riding rice transplanter equipped with an embodiment of this invention, Fig. 2 is a partially omitted schematic plan view of the main parts of the riding rice transplanter, and Fig. 3 is a main part of the riding rice transplanter. 4 is a longitudinal sectional side view of the main part of the same embodiment, FIG. 5 is a circuit diagram of one electric circuit in the same embodiment, and FIG. 6 is a circuit diagram of another electric circuit in the same embodiment. It is a diagram. T...Main machine, F...Support frame, P...Planting section, 4...Top link, 5...Lower link, 7
... Seedling mounting stand, 7A ... Seedling mounting section, 11 ... Auxiliary spring, 14 ... Support frame, 15 ... Fulcrum pin, 16 ...
Mounting frame, 17...Reversible motor, 18...Winch drum, 19...Wire, 26...Spare seedling stand, _S1 , _S2 ...Sensor switch, _S2 ...Sensor switch, 29...Window Hole, 30... Actuation arm, Ra, Rb, Rc... Resistance, D... Seedling amount detector,
R ₁ , R ₂ ... Variable resistance, R ₃ ... Fixed resistance, B ₁ ...
Battery, RS ₁ , RS ₂ ... Relay, D ₁ , D ₂ ...
Diode, B ₂ ... Battery, SW ₁ , SW ₂ ...
...Relay switch, LS ₁ ...Upper limit detection limit switch, LS ₂ ...Lower limit detection limit switch,
D ₃ , D ₄ ...diodes.

Claims (1)

[Scope of utility model registration request] In a riding rice transplanter that is provided with an auxiliary spring that biases and supports a planting part that is vertically movably supported by a three-point link upward in a working position, the base end position of the auxiliary spring is changed to support the auxiliary rice transplanter. A driving means for changing the biasing force of the spring is provided, and a sensor switch is provided at an appropriate position in the seedling loading section of each row of the seedling loading stand in the planting section to detect the presence or absence of each row of seedling pine at that position. , These sensor switches and the driving means are connected so that the biasing force of the auxiliary spring can be increased or decreased in accordance with an increase or decrease in the amount of seedlings in the seedling loading section of each row of the planting section seedling loading table. An auxiliary spring device featuring: