JPS6137884B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic stopping device for a rice transplanter, and in particular is configured to be able to selectively stop a seedling tank at either the center position or both ends of its lateral movement. related to things.

As a rice transplanter, it is equipped with a hydraulic cylinder unit that operates intermittently the main clutch installed in the power transmission line to the planting work section and the traveling device, and an electromagnetic switching valve mechanism that controls its expansion and contraction. A switch circuit that detects a decrease in the number of pine trees operates an electromagnetic switching valve mechanism to stop the rice transplanter from running when seedlings need to be replenished, as well as stop the operation of the planting section, creating a so-called seedling replenishment system. Some machines are known that are equipped with an automatic stop device. In such a rice transplanter, when the seedling tank reaches the center position of its lateral movement, the automatic stop device is activated to align the seedling tank and the reserve tank to prepare for the supply of seedlings. ing.

By the way, the seedling pine on the seedling tank is cut off one by one and planted in the field as the lower end of the removal side is directed from one side to the other by the planting rod as the seedling tank is moved laterally. When starting to plant the first seedling pine, it is necessary to stop the seedling tank at the end position of its lateral movement so that one end of the seedling pine in the width direction faces the planting rod. However, if the seedling tank is located behind the worker and the seedling placement surface faces the rear, it is difficult to check the relative position of the planting rod and the seedling tank, making it difficult to know when to stop the seedling tank. There was a problem.

The present invention was made in order to solve the above-mentioned problem, and the actuation timing of the electromagnetic switching valve mechanism that controls the expansion and contraction of the cylinder unit described above can be set to either the center position or the terminal position during the lateral movement process of the seedling tank. When it is necessary to replenish seedlings when the number of seedlings on the seedling tank has decreased, the seedling tank stops at the center of its horizontal movement process, and when starting the first planting of seedlings, An object of the present invention is to provide an automatic stopping device for a rice transplanter that can stop a tank at the end position of a horizontal movement process.

EMBODIMENT OF THE INVENTION Hereinafter, the structure of this invention will be concretely demonstrated based on the Example shown in drawing.

In FIG. 1, reference numeral 1 denotes a passenger vehicle body, and a rice transplanting machine 3 is connected to the rear portion of the passenger vehicle body 1 via a link mechanism 2. As shown in FIG.

The passenger vehicle body 1 has a front wheel 5 and a rear wheel 6 at the front and rear of a vehicle body frame 4, and is provided with a transmission case 7 located in the middle thereof, and an engine 8 is mounted in front of the vehicle body frame 4, The driver's seat 9 is provided with a steering wheel 10, various operating levers 11, a seat 12, etc., and the power inputted from the engine 8 to the transmission mechanism in the transmission case 7 is transmitted to the left and right rear seats. It is designed to be transmitted to the wheel 6 and the planting machine 3 side. In order to intermittent power transmission to the left and right rear wheels 6 and the rice transplanting machine 3, a main clutch mechanism is provided in the power transmission path from the engine 8 to the transmission case 4, although not described in detail. A clutch lever 13 for operating this is provided facing the driver's seat. Further, a spare seedling tank 15 is horizontally mounted behind the seat 12 via a support 14 erected on the vehicle body frame 4, so that spare seedlings can be stored in two tiers.

The link mechanism 2 is passed between a support 16 erected on the rear body frame 4 of the passenger vehicle body 1 and a connecting member 18 that connects the body frame 17 of the rice transplanting machine 3, and has both ends rotatably pivoted. A parallel link is formed by one supported upper link 19 and two lower links 20, and is expanded and contracted by a hydraulic cylinder 21 interposed between the middle part of the upper link 19 and the vehicle body frame 4. The rice transplanting work machine can be raised and lowered relative to the passenger vehicle body 1 by swinging up and down.

In addition, the rice transplanting machine 3 is such that a body frame 17 is rollably connected to a connecting member 18 at the rear end of the link mechanism 2.
A float 22 is disposed at the bottom of the fuselage frame 17, and a seedling tank 23 is mounted on the guide member 2 with its upper end inclined toward the passenger vehicle body 1.
4 and 25 so as to be able to move laterally in the left and right direction. This seedling tank 23 has a support arm 26
The seedling tank moving rod 27 taken out from the body frame 17 is connected to the seedling tank moving rod 27 via a ,
The lower end of the seedling pine A on the seedling tank 23 is cut out one by one from one side to the other by a planting rod 28 which is installed opposite to the lower end of the seedling take-out side of the seedling tank 23 and moves up and down. It is now possible to plant it in

The clutch lever 13 that engages and engages the main clutch mechanism includes a hydraulic cylinder unit 3 that is controlled to expand and contract by switching an electromagnetic switching valve mechanism 29.
0 is connected. That is, as shown in FIG. 2, the hydraulic cylinder unit 30 is retracted by a built-in return spring 31, and the tip of a piston rod 32 is extended by receiving pressure oil from an electromagnetic switching valve mechanism 29, which will be described later. is a single-acting type that is linked to a clutch lever 13, and the clutch lever 13 is rotated by extension of the piston rod 32 to shut off a main clutch mechanism (not shown). Further, the electromagnetic switching valve mechanism 29 has a solenoid SOL connected to a switch circuit to be described later, and the 3-port 2
This is a 2-way type, and when the solenoid SOL is de-energized, the spring returns to return the oil in the hydraulic chamber 33 of the cylinder unit 30 to the oil tank T as shown in Fig. 2a, and at the same time the solenoid SOL is energized. At times, as shown in FIG. 2b, oil pumped from the oil pump P is supplied into the hydraulic chamber 33.

FIG. 3 shows a switch circuit connected to the solenoid SOL, and shows the battery +, not shown,
- Between the two poles, a solenoid SOL is connected in parallel to the normally open contacts R of relay switches R1 and R2.
1a and R2a, and when either normally open contact R1a or R2a closes, the solenoid SOL is energized. A first switch group 34 is connected between the above two poles via a three-position selector switch COS.
and the second switch group 35 are connected in parallel,
The first and second switch groups 34 and 35 can be configured selectively by switching the selector switch COS. The first switch group 34 stops the seedling tank 23 at the center of its horizontal movement process when the number of seedlings A on the seedling tank 23 decreases, and includes a normally open limit switch LS1 for detecting the center position, and a limit switch LS1 that is always open for detecting the center position. Multiple normally closed limit switches connected in parallel with each other for detecting loss of power
LS1 to LS6 and the relay switch R1 are connected in series. The second switch group 35 is for stopping the seedling tank 23 at the end of its lateral movement process, and is connected to two normally open limit switches LS7 and LS8 connected in parallel to each other for detecting the end position. , the relay switches R2 are connected in series. and,
Limit switch LS1 to LS8 like this
are arranged as shown in FIG. That is, each seedling mounting surface 23a to 23 of the seedling tank 23
For e, use the above limit switch LS2 or LS6.
is arranged corresponding to the addition position of the seedling pine A, and its actuator protrudes above each seedling placement surface, and the weight of the seedling pine A opens the contact point, and as the number of seedling pine A decreases, the number of seedling pine A decreases. The contacts close when the weight is no longer detected. Limit switches LS7 and LS8 are attached to the tip of the support arm 26 on the side of the seedling tank moving rod 27, and a dock for operating them is attached to the body frame 17 side, so that the seedling tank 23 can be moved in one direction during its lateral movement process. When one end is reached, a limit switch LS7 is activated, and at the other end, a limit switch LS8 is activated. Further, a limit switch LS1 is similarly arranged so as to be activated when the seedling tank 23 reaches the center of the lateral movement process. Note that the selector switch COS is provided on the driver's seat 9 for easy operation by the operator.

According to such an automatic stop device, by operating the selector switch COS and forming a switch circuit using the first switch group 34, the seedling tank 23 is stopped at the center of the horizontal movement process when the number of seedlings A decreases. That is, when the number of seedlings A placed on any one of the seedling mounting surfaces 23a to 23e of the seedling tank 23 decreases below a predetermined amount and the corresponding limit switch closes the contact, the seedling tank 23 When the center position is reached in the middle of lateral movement, limit switch LS1 closes its contacts, actuates relay switch R1, and closes its contacts R1a. As a result, the solenoid SOL is energized and the electromagnetic switching valve mechanism 29 switches the oil path as shown in FIG. the main clutch mechanism (not shown). Therefore, the vehicle body 1 stops traveling, the rice transplanting machine 3 stops operating, the seedling tank 23 stops at the center position of the lateral movement process, and the seedling tank 23 is aligned with the preliminary seedling tank 15 in the width direction. has been completed and ready to supply spare seedlings.

When replenishing the seedling pine A for the first time, the selector switch COS is connected to the second switch group 35 side. Then, when one of the seedling tanks 23 reaches the end of the horizontal movement process, the limit switch LS is activated.
When either 7 or LS8 is turned on, relay switch R2 is activated, closing its contact R2a and energizing solenoid SOL. As a result, the main clutch mechanism (not shown) is shut off in the same manner as described above, so that the seedling tank 23 stops at the end position of the lateral movement process. Therefore, the first pine A is replenished onto each seedling placement surface and the planting work is started. Before starting the planting process, press the selector switch.
By switching COS to the neutral position, relay switch R2 is turned OFF, and its contact R2a
Open to de-energize solenoid SOL. As a result, the electromagnetic switching valve 29 switches the oil path as shown in FIG. 2a to retract the piston rod 32.
This connects the main clutch mechanism (not shown). At the start of the horizontal movement of the seedling tank 23, since the planting rod 28 faces one end of the seedling pine A in the width direction, the seedlings can be sequentially moved from one side to the other without leaving any uncut parts. Cut out one plant at a time and plant it in the field.

Thus, according to the present invention, by selecting one switching position of the changeover switch, when the number of seedlings on the seedling tank has decreased and it is necessary to replenish the seedlings, the rice transplanter automatically activates the rice transplanter when the seedling tank reaches the center position of its lateral movement process. Due to the activation of the stop device, it is possible not only to stop the seedling tank in a central position and prepare a so-called seedling supply position, but also, in particular, depending on the selection of other switching positions of the changeover switch, to prevent the seedling tank from moving laterally. Since the automatic stop device operates when the seedling tank reaches the end of the horizontal movement, the seedling tank automatically stops at the end of the horizontal movement, so even in a rice transplanter where it is difficult to confirm the relative positions of the seedling tank and the planting rod, the initial To easily align the position of a seedling tank when starting planting.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of a riding rice transplanter to which the present invention is applied, FIG. 2 is a configuration diagram showing the main parts of the present invention, and FIG. 3 is a circuit diagram of a switch circuit according to the present invention. 4 is a plan view showing the rear part of the riding rice transplanter shown in FIG. 1, and FIG. 5 is a partially enlarged view of FIG. 4. DESCRIPTION OF SYMBOLS 1...Passenger vehicle body, 2...Link mechanism, 3...Rice transplanting machine, 13...Clutch lever, 23...Seedling tank, 29...Solenoid switching valve mechanism, 30...Hydraulic cylinder unit, 32...Piston rod, 34
...First switch group, 35...Second switch group, A...Sapling pine, LS1...Limit switch for detecting center position, LS2 to LS6...Limit switch for sensing decrease in seedling pine, LS7, LS8...Terminal Position detection limit switch, COS...Selector switch, R1, R2...Relay switch,
SOL... Solenoid.

Claims (1)

[Claims] 1. A hydraulic cylinder unit that intermittently operates the main clutch mechanism of the rice transplanter, an electromagnetic switching valve mechanism that controls expansion and contraction of this hydraulic cylinder unit, and a switch circuit that detects when seedling replenishment is necessary and energizes the electromagnetic switching valve mechanism. In an automatic stop device for a rice transplanter, which shuts off the main clutch mechanism and stops the running of the rice transplanter and the operation of the planting work section when seedlings need to be replenished, the switch circuit is configured to shut down the seedlings in the seedling tank. It has a first switch group consisting of a switch for detecting a decrease and a switch for detecting the center position of the lateral movement of the seedling tank, and a second group of switches consisting of a switch for detecting the end position of the lateral movement of the seedling tank, etc. A switch is provided to switch the connection of the first and second switch groups to the electromagnetic switching valve mechanism, and the stop position of the seedling tank can be selected from either the center position or the terminal position of the lateral movement process. An automatic stop device characterized by: