JPH0524263Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an intermittent feeding device for seedlings in a rice transplanter.

The seedling stand of a rice transplanter is generally equipped with an intermittent feeder for seedlings, and the pine seedlings placed on the seedling stand are scraped off with a planting rod at the end of the seedling stand that moves back and forth from side to side. After that, an intermittent feeding device is activated to uniformly feed the pine seedlings vertically. However, this intermittent feeding device is usually set in such a way that the feeding rotating body, such as a roller with protrusions or a belt, protrudes from the back side of the seedling platform above the sliding surface of the pine seedlings (bottom surface of the seedling platform). Due to the mounting structure, when replenishing seedlings, there is a disadvantage that the protrusions of the feeding rotor become an obstacle and prevent a smooth seedling replenishment operation.

In order to solve this inconvenience, a structure has been proposed in which the rotating body for feeding out seedlings is immersed in the back side of the seedling stand when replenishing seedlings (Japanese Patent Application Laid-open No. 1983-1999-
Publication No. 88609).

However, with this system, the retraction and retraction of the feed-out rotor is manually operated using a special lever, which not only makes operating the lever cumbersome, but also requires the feed-out rotor to return to its original position after the seedling replenishment process is completed. It is easy to forget to operate the lever for seedling, and when this operation is forgotten, the intermittent feed-out function of the seedlings does not work, causing problems such as the occurrence of missing plants after planting is resumed.

The present invention was developed based on the above-mentioned actual situation, and its purpose is to link the operating state of the hydraulic pressure of the hydraulic mechanism that controls the vertical movement of the aircraft to the respective operations of the main clutch lever and planting clutch lever. In a rice transplanter that can at least control a hydraulic valve, the main clutch lever and the planting clutch lever are respectively connected to the operating body of the hydraulic valve, and a coil spring is included in the linkage mechanism that connects the main clutch lever and the hydraulic valve. Clutch disengagement position B
Seedling replenishment position C, which is located closer to the anti-clutch engagement position A than the clutch engagement position A, and the hydraulic operating state is automatic only when lowering.
, an intermittent feed-out device for seedlings is attached to the seedling stand, the intermittent feed-out device is configured to be freely switchable between a seedling feed-out position and a non-work position, and the intermittent feed-out device is linked to the clutch lever, and , a relief spring is provided in the linkage mechanism of the automatic planting part elevation control device that connects the front part of the float for field sliding and the hydraulic valve to release the upward movement of the float within a predetermined range, and the spring releases the tension of the elastic body. By setting the tension to be higher than that of the seedling clutch lever and arranging the intermittent seedling feeding device to automatically switch from the seedling feeding position to the non-working position only when the main clutch lever is operated to the seedling supply position C, the above-mentioned There is no need for an operating lever dedicated to switching the feeding rotor as in conventional models, and the intermittent feeding device can be automatically switched by simply operating the lever of the main clutch lever, which is naturally required when replenishing seedlings and when resuming planting after seedling feeding is completed. The present invention aims to provide an intermittent feed-out device for a rice transplanter that can reduce the burden on the operator and eliminate the possibility of forgetting to return the intermittent feed-out device or erroneous operation.

To explain the configuration of the present invention with reference to an embodiment shown in the drawings, 1 is the body of a rice transplanter;
A transmission case 2 and an engine 3 are attached to the front part of the machine, and a planting part consisting of a steering handle 4, a seedling stand 5 that reciprocates left and right, and planting rods 6, 6, etc. is attached to the front part. The front parts of swing cases 9, 9, which support wheels 8, 8 at the rear, are attached to shafts 7, 7 which protrude from the transmission case 2 to both sides so as to be tiltable up and down. An arm 10 rising from the front part of the hydraulic cylinders 9, 9 is interlocked with a hydraulic cylinder 12 via linking rods 11, 11, a balance mechanism 11a, and the like.

In addition, the float 13 that slides on the rice field is pivotally supported on the body 1 via a planting depth adjustment mechanism so that it can tilt up and down, and the front part is connected to the engine frame 14 via a link 15 so that it can move up and down. .

Furthermore, the front part of the float 13 and the hydraulic valve 16 of the hydraulic system are connected by a linking mechanism of an automatic planting section lifting/lowering control device, and this linking mechanism is connected to the front part of the float 13
The front part is connected to the connecting rod 17, and the middle part is the transmission case 2.
is connected to the front part of an arm 19 on which a pin 18 is pivotally supported, and an isosceles triangular actuating body 21 having pins a, b, and c at each corner is fixed to the rotation shaft 20 of the hydraulic valve 16. The pin a at the apex of the actuating body 21
and the pin d at the rear of the arm 19 through the connecting plate 2.
2, and both pins a and d are pulled by a release spring 25 made of a coil spring. This relief spring 25 allows the float 1 to be moved within the range of the long holes 23 and 24.
The upper movement of the front side of 3 can escape.

With this configuration, when the float 13 is pushed up by the mud surface and the arm 19 is rotated counterclockwise in FIG. 2, and the actuating body 21 is thereby rotated clockwise, the hydraulic cylinder 12 is pushed out. , the wheels 8, 8 descend and push up the aircraft 1,
Conversely, when the float 13 descends relative to the body 1, the operating body 21 rotates counterclockwise, causing the body 1 to descend.

The wheels 8, 8 are raised and lowered automatically by the sensing operation of the float 3 during planting work, but the main clutch lever 26 is connected to the operating body 21 of the hydraulic valve 16.
Two levers, a planting clutch lever 27 and a planting clutch lever 27, are connected to each other, and the hydraulic cylinder 12 can be manually operated by operating the main clutch lever (also used as a travel clutch) 26 and the planting clutch lever 27 provided at the hand of the handle 4. It is now possible to operate it using the .

That is, as shown in FIG. 3, the bases of a main clutch lever 26, a hydraulic lowering arm 29, a planting clutch lever 27, and a hydraulic raising arm 30 are rotatably supported on a support shaft 28 that is integral with the handle 4. An L protruding from the boss portion of the main clutch lever 26
The mold bar 31 is attached to the main clutch lever 26 on the lower surface of the hydraulic lowering arm 29 to which the stopper 32 is engaged.
contact at the cutting position, and the planting clutch lever 2
The L-shaped bar 33 protruding from the boss portion of 7 abuts the lower surface of the oil pressure raising arm 30 which is locked by the stopper 34 at the cut position of the planting clutch lever 27, and lowers the oil pressure lowering arm 29 of the actuating body 21. Upper side pin b
Since the oil pressure raising arm 30 is connected to the lower pin c of the actuating body 21 with wires 35 and 36, respectively, through metal fittings 35a and 36a having elongated holes at their tips, the main clutch lever 26 can be moved from the engaged position A. After cutting position B, the seedling replenishment position, which is located closer to the opposite position A than the cutting position B, is the lowering position = ``lowering only automatic'' position C (the machine 1 automatically moves to the lowering side by float sensing) The hydraulic control position is such that it lowers the target but does not operate on the raising side, and the float detection prevents the danger of the aircraft 1 rising suddenly, allowing it to be fixed at the lower position.
Also called location. ), the bar 31 pushes up the hydraulic lowering arm 29 and pulls the wire 35,
When the actuating body 21 rotates counterclockwise and the machine body 1 descends, and when the planting clutch lever 27 is set from the engaged position D to the raised position G via the cut position E and the fixed position F, the wire 36 and the metal fittings are 36a pulls the lower part of the operating body 21 rearward, rotates the operating body 21 in a clockwise direction, and the body 1 rises. Eventually, the body 1 can be raised and lowered by manual operation.

On the other hand, the main clutch lever 26 is set to the seedling supply position C, and the planting clutch lever 27 is set to the fixed position F.
When set to , the pin C engages with the end of the elongated hole provided in the metal fitting 36a, and the hydraulic valve 16 is fixed in the neutral position (the set position during storage, transportation, etc.)
(See c in Figure 6).

In this way, the main clutch lever 26 is used to lower the machine body 1 manually, and the planting clutch lever 27 is tilted to raise the machine body 1, respectively.

By the way, an elastic body 37 is interposed in the linking mechanism that links the main clutch lever 26 and the hydraulic valve 16. That is, the hydraulic pressure lowering arm 29 and the actuating body 21 that switches the hydraulic valve 16 are shown in FIG.
As shown in FIGS. 5 and 7, they are connected by a wire 35 via a telescopic elastic body 37 made of a coil spring or the like. And this elastic body 3
The tension of 7 is set higher than the tension of the relief spring 25, and by the intervention of this elastic body 37, the oil pressure can be raised ( (aircraft lift) operation is now possible.

With this configuration, when the main clutch lever 26 is located at the seedling supply position C, when the planting clutch lever 27 is tilted to the raised position G, the wire 35 on the lower side of the body is pulled, but this tensile force is elastic. The main clutch lever 26 at the seedling supply position C does not move because it is absorbed by the elongation of the body 37.
It remains positioned at the seedling supply position C.

The oil pressure control relationship by operating the main clutch lever 26 and the planting clutch lever 27 is as described above, and the relationship between these two clutch levers 26, 27 and the oil pressure operating state is as shown in FIG. ``Automatic lift only'', indicated by B in the figure, is used when turning on headlands, crossing ridges, etc. in a hydraulically activated state where the aircraft 1 automatically rises to the up side by sensing the float, but does not go down to the down side.

Note that 39 is an outer stop plate of the wires 35 and 36 on the handle 4 side. Reference numeral 40 denotes a running wire whose one end is connected to a tension arm of a running belt transmission (not shown) which also serves as a main clutch, and the other end is connected to the main clutch lever 26 via an arm 41.
It is connected to the. Reference numeral 50 denotes a hydraulic clutch operating wire, one end of which is connected to the hydraulic clutch (not shown), and the other end connected to the planting clutch lever 27 via an arm 51. 4
3 is an operation panel.

In FIG. 9, P indicates protrusions 44a, 44 on the outer peripheral surface.
This intermittent feeding device P consists of rollers 44 and the like having rollers 44, etc., and this intermittent feeding device P feeds out seedlings with projections 44a, 44a, . It is configured to be switchable between a working position and a non-feeding working position, which is recessed into the back side of the seedling platform 5. 45 is an L-shaped arm that rotatably supports the roller 44, and is attached to the seedling stand 5.
The roller 44 is tiltably supported via a pin 47 to a bracket 46 fixed to the roller 44, and is always urged by a spring 48 to be located on the side where the seedlings are fed out. 49 is a stopper.

By the way, the base end side of the arm 45 is connected by a wire 42 to the hydraulic pressure lowering arm 29 which is connected to the main clutch lever 26.
Only when it is operated to the lowering only automatic position, that is, the seedling supply position C, the seedling intermittent feeding device P changes from the seedling feeding position (the state shown by the solid line in FIG. 9) to the non-feeding position (the state shown by the phantom line). It is designed to switch automatically. In the figure, 5a is a seedbed presser, and 5b is a holder thereof, and also a seedling presser.

In the configuration as described above, when the main clutch lever 26 is now operated from the disengaged position B to the engaged position A shown in FIGS. 7 and 8, the traveling wire 40 is pulled, so that the machine body 1 travels.

Then, the planting clutch lever 27 is operated to the entry position D to start the planting work. When the planting work progresses and the number of remaining seedlings on the seedling platform 5 decreases, the machine 1 is stopped to replenish the seedlings. At this time, the main clutch lever 26 is operated from the cut position B to the seedling replenishment position C. Then, the hydraulic lowering arm 29 is connected to the main clutch lever 2.
6 is pushed up by the L-shaped bar 31 integrated with the L-shaped bar 31, rotates clockwise in FIG. Set it to semi-automatic lowering mode. In this state, as described above, the body 1 automatically lowers to the lower side, but does not move to the upper side.
Therefore, safety is maintained since the body 1 does not rise suddenly due to float detection when replenishing seedlings.

On the other hand, the wire 42 is also pulled in the same direction as the wire 35 due to the rotation of the hydraulic pressure lowering arm 29, so the arm 45 rotates about the pin 47 in the direction of arrow A in FIG. The seedling feeding position is switched to the non-feeding position shown by the phantom line. Thereby, the work of replenishing seedlings can be carried out smoothly without being hindered by the rollers 44.

By the way, if you want to raise the machine for some reason during seedling replenishment work, for example if the machine sinks due to an increase in the weight of the seedlings, operating the planting clutch lever 27 to the raised position G will raise the machine. When the main clutch lever 26 is located at the seedling supply position C, when the planting clutch lever 27 is tilted to the raised position G, the wire 35 on the lowering side of the machine is pulled as described above, but this tensile force is due to elasticity. Since the main clutch lever 26 at the seedling supply position C is absorbed by the elongation of the body 37 and does not move,
The wire 42 does not loosen, and therefore the roller 44 of the seedling intermittent feeding device P can be kept in the non-feeding position where it is retracted into the back side of the seedling platform 5. Therefore, it is not only possible to easily replenish seedlings with the aircraft in an elevated state, but also to avoid troublesome operations such as resetting the main clutch lever 26 to the seedling supply position C each time the aircraft is raised or lowered. can be made unnecessary.

Now, after completing the seedling supply work, when the main clutch lever 26 is returned to the entry position A in order to resume the planting work, the hydraulic pressure lowering arm 29 is released from the pressing action by the L-shaped bar 31, so that the arm 45 and the roller 44 is automatically returned to the seedling feeding position by the spring 48. Therefore, it is possible to completely eliminate forgetting to return the roller 44 after seedling supply.

Also, since the main clutch lever 26 is operated only within the area between the engaged position A and the cut position B during the planting operation, the seedling supply position C is set closer to the clutch engaged position A than the clutch disengaged position B. Coupled with this, the roller 44 will not be inadvertently switched from the feeding position to the non-feeding position during the planting operation. Therefore, even if the main clutch is disengaged (stopped) for some reason other than when replenishing seedlings during the planting operation, the seedling stopping action by the protrusion 44a of the roller 44 is maintained, so that vibrations of the engine, etc. This prevents the seedlings from accidentally falling off. Therefore, it is possible to eliminate compressive deformation of the front edge of the seedbed soil, variations in seedling density, and collapse of the seedbed soil caused by seedlings falling off.

Since the present invention is constructed as described above, it is possible to completely eliminate the need for an operating lever dedicated to switching the feeding rollers as in conventional systems, and the main clutch lever lever, which is naturally operated when replenishing seedlings and when resuming planting work after seedling replenishment, is required. The intermittent feeding device for seedlings can be automatically switched by simply operating the device, reducing the burden on the operator and eliminating the possibility of forgetting to return the device or operating the device incorrectly. Unless the main clutch lever is further operated from the cut position B to the seedling supply position C, the seedling intermittent device will not be inadvertently switched from the feeding position to the non-feeding position, and therefore, during the planting operation,
Even if the main clutch is disengaged for some reason other than when replenishing seedlings, the feeding device retains its stopping action on the seedlings, which prevents the seedlings from accidentally slipping off due to engine vibrations, etc. It is possible to eliminate compressive deformation of the front edge of the seedbed soil, variations in seedling density, and collapse of the seedbed soil due to shedding, and the accuracy of planting seedlings is further improved. In addition, even if the main clutch lever is at the seedling supply position C and the machine is raised, the intermittent seedling feeding device remains in the non-feeding position due to the elastic body interposed in the linkage mechanism between the main clutch lever and the hydraulic valve. When replenishing seedlings,
If the aircraft is raised for some reason, such as sinking due to an increase in the weight of the seedlings, it is not only possible to easily replenish the seedlings while the aircraft remains elevated.
When replenishing seedlings, troublesome operations such as resetting the main clutch lever to the seedling replenishing position C every time the machine body is moved up and down are unnecessary, and the seedling replenishing work can be performed extremely easily and efficiently.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of a rice transplanter equipped with the present invention, Fig. 2 is a side view showing the structure of the hydraulic actuation mechanism based on float sensing, Fig. 3 is a perspective view showing the internal structure of the operation panel, and Fig. 4 is a side view of the same as above, FIG. 5 is a plan view of the operation panel, and FIG. 6 is an explanatory diagram showing the relationship between the set position of the main clutch lever and planting clutch lever and the operating state of the hydraulic pressure, and each hydraulic operation. Fig. 7 is a side view of the main parts, Fig. 8 is a plan view showing each operating position of the main clutch lever, and Fig. 9 is an explanatory diagram of the action of the main parts. be. In the figure, 1 is the fuselage, 5 is a seedling stand, 13 is a float for sliding on the rice field, 16 is a hydraulic valve, 21 is a hydraulic valve operating body, 25 is a relief spring, 26 is a main clutch lever, and 27 is a planting clutch lever. ,3
7 is an elastic body, P is an intermittent feeding device for seedlings, a is a seedling,
C is the seedling supply position.

Claims (1)

[Scope of utility model registration request] In a rice transplanter in which the hydraulic valve can be controlled by linking the operating state of the hydraulic pressure of the hydraulic mechanism that controls the vertical movement of the machine body to the respective operations of the main clutch lever and the planting clutch lever, the operating body of the hydraulic valve has the main clutch lever. The clutch lever and the planted clutch lever are connected to each other, and an elastic body such as a coil spring is interposed in the connection mechanism that connects the main clutch lever and the hydraulic valve. A seedling replenishment position C is provided, which is located on the opposite side of the clutch input position A, and the hydraulic operating state is automatic only for lowering, and the seedling stand is equipped with an intermittent feeding device for seedlings, and the intermittent feeding device is used to feed out the seedlings. An intermittent feeding device is configured to be freely switchable between an active position and a non-active position, and the intermittent feeding device is connected to the main clutch lever, and an automatic planting part lifting/lowering control device is connected to the front part of the field sliding float and the hydraulic valve. A release spring is provided in the mechanism to release the upward movement of the float within a predetermined range, and the tension of the elastic body is set to be greater than the tension of the release spring, and the seedling intermittent operation is performed only when the main clutch lever is operated to the seedling supply position C. 1. An intermittent feeding device for seedlings in a rice transplanter, characterized in that the feeding device is configured to be interlocked so as to automatically switch from a seedling feeding position to a non-working position.