JPS59203414A - Riding type rice planter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a riding type rice transplanter having a rice transplanting device connected to the rear of a traveling vehicle body.

A seedling stand that is appropriately tilted on the upper side of the rice transplanter frame so that the front side is on top; a planting tool that divides and plants seedlings from the rear lower end side of the seedling stand; 2. Description of the Related Art A riding type rice transplanter is known in which a rice transplanting device equipped with a soil leveling float that floats up to level the ground is mounted on the ridge of a riding tractor body so as to be movable up and down.

Conventionally, in this type of riding rice transplanter, a rice transplanting device is attached to a riding tow vehicle body via upper and lower links so that it can be raised and lowered, and the rice transplanter is attached to the lower base pivot part of the upper and lower links. The attachment part of the link is movable back and forth, and when the upper and lower links are swung upward and rotated, the rice transplanting device is tilted forward,
It was designed to make it easier to feed seedlings from the passenger seat position to the seedling stand of the rice transplanting device. However, with such a device,
When the rice transplanter is lowered into the field, if there is a partial ridge on the soil surface, the rice transplanter may tilt forward and the front end of the seedling platform may come into contact with the seat of the aircraft, causing damage. Ta.

In view of the above-mentioned circumstances, this invention provides a rice transplanter configured so that when the rice transplanter is raised, it is tilted forward, and when it is lowered, it is not tilted forward excessively even if there is a partial upheaval in the field. This is what we provide.

That is, the riding-type rice transplanter according to the present invention has a seedling platform installed on the upper side of the rice transplanter frame at an angle so that the front side is on top, and seedlings are divided and planted from the rear lower end of the seedling platform. A rice transplanting device equipped with a seedling planting tool to be attached and a soil leveling float that floats above the soil surface to level the ground is attached to the rear of a passenger towing vehicle body, and upper and lower links pivotally connected to the towing vehicle body, and one of the links. The base side is pivotally connected to the other side, and connected to the other side through a connecting frame that is freely rotatable back and forth by a certain amount around one of the pivot joints, and the passenger initial puller body and at least one of the links The present invention is characterized in that an actuating device for moving the link up and down is provided in between, and a stopper is provided between the upper link and the connecting frame to prevent excessive forward tilting when the rice transplanting device is lowered.

An embodiment of the present invention will be described in detail with reference to the drawings. Reference numeral 1 denotes a passenger towing vehicle body, an engine stand 3 is attached to the front part of a transmission case 2, and base parts are fixed to both left and right sides of the transmission case 2. Chain cases 4, 4 are provided that extend downward to the rear, rear wheels 5, 5 are pivotally supported on both left and right sides of the chain cases 4, 4, and front wheels 6, 6 can be turned to the lower portions of both left and right sides of the engine stand 3. It is set up in 7 is the bonnet, which covers the engine mounted on the engine stand.

Reference numeral 8 denotes a passenger seat, and the rear view connecting the left and right chain cases 4, 4 to each other is provided at the top of a gate-shaped frame 9. 10 is the handle, II is the change lever, 12
indicates the brake pedal.

Reference numeral 13 denotes preliminary seedling mounting stands, which are provided on both the left and right sides of the passenger seat 8 so as to project outward, respectively, so that seedlings grown in the seedling box can be stored and placed together with the seedling box. .

14. 14 is a protruding frame, which is attached to the left and right chain cases 4, 4.
The base is fixed to a connecting pipe 15 that connects the two, and the frame protrudes upward and is located inside the gate-shaped frame 9.

16 is an upper link, and 17 is a lower link. One upper link is provided inside the protrusion frame 14.14, and its base is movable up and down by a pin 18 provided between the protrusion frames 14.14. It is pivoted.

Further, a pair of lower links 17 are provided on the left and right, and their bases are pivotally connected to protrusion pins 19.19 provided on the outside of the protrusion frame 14.14, respectively.

Reference numeral 20 denotes a connecting frame, the lower part of which is fixed to a rotatable pin 21 that connects the rear ends of the left and right lower links 17 and 17, and the upper part of which a pin 22 attached to the upper link 16 is inserted so as to be movable back and forth. The upper part is provided with a long hole 23 and is provided so that the upper part thereof can be rotated back and forth about the pin 21.

Reference numeral 24 denotes an actuating device, which is a hydraulic cylinder device in the illustrated example, in which the base of a hydraulic cylinder 248 is pivotally connected to the transmission case 2, and the tip of a hydraulic piston 24I3 is pivotally connected to an arm 25 that is integrated with the upper link 16. It is provided so that the upper link 16 is prevented from swinging upward by the protrusion of the piston.

Reference numeral 26 denotes a rice transplanting device, in which a seedling platform 28 is attached to the front upper part of a transmission case which also serves as a rice transplanter frame 27 so as to move back and forth from side to side so that the front side is on top. A planting tool 29 is provided for dividing and planting seedlings one by one from the seedling platform 28, and furthermore, a soil leveling float 80a in the center and a leveling float provided on the sides thereof are provided below the rice transplanter frame 27. 301) are installed to level the soil surface.

A hydraulic switching valve 31 is attached to the rice transplanter frame 27, and its switching spool is connected to the soil leveling float aoa, and when the spool is pushed up by the upward movement of the soil leveling float 30a, the piston 24b protrudes. , the piston 24b is configured to retract when the piston 24b is pulled out.

Further, a lever 32 and a wire 33 provided on the side of the passenger seat 8 are configured so that the front portion of the earth leveling float 30a can be lifted at will.

Reference numeral 34 denotes a rolling shaft, which protrudes from the front of the rice transplanter frame 26, and is inserted into the rear end of the cylindrical body 35 fixed to the pin 21 integrated with the connecting frame 20, and is fitted with a retaining pin to prevent it from being pulled out. I am typing 36.

The rice transplanting device 26 is rotatably attached to the rolling shaft 84.

37 is an in4 connecting frame rotation mechanism, in the illustrated example, the connecting frame 2
The U-shaped frame 87a whose base is fixed to the pin 21 integral with 0 and protrudes forward, and the left and right lower links 17.
When the upper link 16 rotates upward due to the protrusion of the hydraulic piston 24'b, the U-shaped frame 37a comes into contact with the connecting pin 37b, and the connecting frame 20 moves forward ( It is configured to be forcibly rotated in the direction of arrow X).

In addition, 38 is a transmission shaft, and power is transmitted to the rice transplanting device 26 via this shaft.

This rice transplanting device 26 includes the upper link 16 and a connecting frame 20.
A stopper 40 is provided between the two.

The stopper 40 consists of a bolt 43 supported by a nand 42, 42' in a hole in a mounting plate 41 integrally provided with the upper link 16, and a stop pin 44 provided at the top of the connecting frame 20. At the tip of 43 is a contact plate 4.
5 is fixed.

The positional relationship between the contact plate 45 and the stop pin 44 is preferably such that there is a slight gap between them when the rice transplanting device 26 is lowered to the lowest position. By loosening the bolts 42 and 42', the amount of protrusion of the bolt 43 can be adjusted as appropriate. In this way, it is practically preferable to make the interval between the stoppers 40 adjustable. The stopper 40 prevents the 111 transplantation device 26 from tilting forward when descending.
This is the link above 16. The parallel link device including the lower link 17 and the like may be provided in other parts of the rice transplanting device.

Next, when using this rice transplanter, please use the spare seedling stand 13.
The seedlings with soil are placed on each of the rice cultivation boxes, and the seedlings taken out from the seedling cultivation boxes are placed on each of the seedling stands 28 of the rice transplanting device 26.
Release a from the lifted state. As a result, the spool of the hydraulic switching valve 31 is switched to the unloading direction. The oil in the hydraulic cylinder 24a is still returned to the oil tank, the piston 24b is retracted by the load of the transplanting device 26, and the rice transplanting device 26 is lowered. When the soil leveling floats aoa and sob are brought into contact with the soil surface of the field, the spools are pushed up and the hydraulic switching valve 31 is switched to the neutral state, thereby stabilizing the floats.

In this state jl, while moving the passenger towing vehicle body 1 forward,
The transmission shaft 38 transmits power to each rotating part on the rice transplanting device 26 side. Then, the seedling platform 28 reciprocates from side to side at a constant speed, and the seedling direct attaching tool 29 divides the seedlings one by one from the lower end of the seedling platform 28, and the soil is leveled by the soil leveling floats 30a and 30b. Plant it on the broken surface.

During such work, the rice transplanting device 26 uses the rolling shaft 34 to prevent the towing vehicle body 1 from tilting from side to side, and even if the towing vehicle body 1 tilts back and forth slightly, the connecting frame 20 remains pinned. Since the soil leveling float 30a can be rotated around the soil surface 21 at a constant speed, it does not tilt forward or backward and always floats on the soil surface.

The seedling planting layer is maintained at a constant depth by being pulled while being supported by 30b.

In addition, due to large fluctuations in the plowing platform, the towing vehicle body may be
When the level fluctuates upward or downward, use the leveling float 30.
a is pushed up, or conversely becomes suspended in the air,
The hydraulic switching valve 31 is automatically switched, and the actuating device 2
4 (hydraulic cylinder device), the rice transplanting device 26 is automatically controlled up and down to maintain proper seedling planting at all times.

In this way, seedlings can be planted on the seedling stand 28 while the work is being done.
When feeding the seedlings in the preliminary seedling platform 13 to the seedling platform 28 due to a decrease in the number of seedlings in it, after stopping the propulsion of the towing vehicle l and the power transmission on the rice transplanting device 26 side, level the ground using the operating lever 32. The flow 1308 is moved upward, the hydraulic switching valve 31 is switched, the hydraulic piston 24,b is protruded, and the upper link 16 is moved upward.
\Take a picture.

Since the load of the rice transplanting device 26 is applied to the connecting frame 20, the pin 22 attached to the upper link 16 is initially located at the front edge of the elongated hole 23 of the connecting frame 20, but the upper link 16 When the U-shaped frame 37a gradually rotates upward and reaches a certain height, the U-shaped frame 37a comes into contact with the connecting pin 87b, and the U-shaped frame 87a is gradually pushed down, which causes the connecting frame 20 to move forward. The entire rice transplanting device 26 is tilted forward (with the eave and the top). Therefore, the seedling stand 28
As it approaches the passenger seat 8 side, its inclination angle becomes gentler, allowing the operator to easily and reliably feed seedlings with soil to the seedling platform 28.

Next, when the seedlings have been supplied to the seedling stand 28, the operating lever 32
in! Lower the cough area flow) 30a and turn on the hydraulic switching valve 31.
, the piston 30b is retracted, and the rice transplanting device 26 is lowered. In this case, the connecting frame 20 slowly moves rearward -
＼Rotate and return to the original position, ゛Garden flow) 30a, 30b
When the ground is leveled to the broken soil surface, the hydraulic valve 31 returns to the neutral state, so rice planting work can be started again in this state.

Since this rice transplanting device 26 is provided with a stopper 40 between the upper link 16 and the connecting frame 20, the rice transplanting device 26
During the planting operation when the floats 30a and 30b are lowered, the rear part of the soil leveling floats 30a and 30b may
Even if a force is exerted to cause the rice transplanting device 26 to lean forward by riding on this, the stopper 40 prevents the rice transplanting device 26 from tilting forward. Therefore, an accident in which the front end of the seedling platform 28 comes into contact with the preliminary seedling platform 13 or the like and is damaged can be effectively prevented.

On the other hand, when raising the rice transplanting device 26, the stopper 40
Since the distance (1) between the two is widened, forward tilting of the seedling platform 28 is often prevented by this.

As explained above, the rice transplanter according to the present invention is capable of tilting the seedling platform 28 forward to a favorable state when the rice transplanter is raised, and is also capable of tilting the seedling platform 28 forward to a favorable state when the rice transplanter is being raised, and is also capable of excessively tilting the seedling platform 28 even if the soil leveling float runs aground on a ridge in the field when the rice transplanter is being lowered. This makes it possible to prevent the seedling table 28 from tilting forward, making it possible to prevent damage to the seedling stand 28.

[Brief explanation of drawings]

Figures 1 and 2 are a perspective view and a cross-sectional view of a connecting frame rotating mechanism for a riding type vehicle according to the present invention, Figure 5 is a side view showing the rice transplanter in the raised state, and Figure 6 is a view without a stopper. FIG. l...Passenger towing vehicle body, 2...Mission case, 4
...Chain case, 5. Rear wheel, 13.. Spare seedling stand, 8.. Seat, 14.. Projection frame, 16.. Upper link, 17.. Lower link, 20.. Connecting frame, 23・
... Improvement, 24... Actuation device, 26... Rice transplanting device,
28... Seedling stand, 29... 11 planting tools, 30 a,
301) ... Leveling -y o-), /1.0... Stopper. Patent applicant: Iseki Agricultural Machinery Co., Ltd. Agent: Hiroshi Sugawara, patent attorney

Claims (1)

[Claims] A seedling platform is installed on the upper side of the rice transplanter frame at an angle so that the front side is on top, a seedling planting tool is used to divide and plant the seedlings from the lower rear end of the seedling platform, and a seedling planting tool is installed on the soil surface. A rice transplanting device equipped with a soil leveling float that floats up to level the ground is attached to the rear of a passenger towing vehicle body, with upper and lower links pivotally connected to the towing vehicle body, the base side being pivotally connected to one of the links, and the base side being pivotally connected to the other. An actuating device is provided between the passenger towing vehicle body and at least one of the links, which is connected via a connecting frame freely rotatable back and forth by a certain amount around one pivot joint, and which moves the link up and down. A riding-type rice transplanter characterized in that a stopper is provided between the upper link and the connecting frame to prevent the rice transplanter from tilting forward excessively when the rice transplanter is lowered.