JPS5940402B2 - Riding rice transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a riding-type rice transplanter in which a worker rides on a traveling machine and performs rice planting work.

Conventional rice transplanters were generally operated by a worker while walking along with the rice transplanter, but if the worker were to ride and operate a traveling machine equipped with a seedling transplanting device, it would be easier to operate the rice transplanter. It is very desirable because it reduces the fatigue of the person.

However, in a riding-type rice transplanter with a seedling planting device attached to the traveling machine, in order to properly and reliably plant seedlings in the field, it is necessary to set the seedling planting device independently of the pitching of the traveling machine. It is necessary to constantly glide stably over the field.

In other words, if the traveling body pitches due to the unevenness of the plowing platform on which the wheels of the traveling body are in contact with the ground, the seedling planting device attached to this traveling body also pitches, so the seedlings planted in the field may become saturated or the seedlings may become too deep. It will end up being planted.

Furthermore, in order to further improve workability, the seedling planting device must be able to be raised and lowered at will when traveling on the road or turning in the field.

Therefore, to solve the latter point, it is sufficient to connect the seedling planting device to the traveling machine via a link mechanism so that it can move up and down, and to operate the seedling planting device up and down from the traveling machine side. In order to improve this, it is possible to provide the link in the link mechanism with a flexible mechanism that allows the link to freely expand and contract in the longitudinal direction.

However, by providing a flexible mechanism in the links in the link mechanism, although it is possible to prevent the negative effects caused by the pitching of the traveling machine being transmitted to the seedling planting device, the seedling planting device that slides on the field Since the seedling planting device makes frequent and fine pitching movements in response to the unevenness, a new problem arises in that the attitude of the seedling planting device with respect to the field becomes unstable.

The present invention has a structure in which the pitching of the traveling machine body is not transmitted to the seedling planting device, but the seedling planting device is stabilized by preventing frequent and fine pitching movements in response to even slight irregularities in the field. The purpose is to

Therefore, in the present invention, a seedling planting device having a float, a seedling stand, and a planting mechanism is attached to a traveling body supported by front wheels and rear wheels so as to be movable up and down by a pair of upper and lower links. A riding-type rice transplanter comprising a lifting mechanism for lifting and lowering the seedling planting device with respect to the traveling machine,
The above-mentioned upper and lower archipelago ＼ Ride,, 4th, on the upper link, the pivot point between the upper link and the seedling →- is located front and rear with respect to the traveling aircraft within a certain range along the length direction of the upper link. an accommodating mechanism is provided, the accommodating mechanism includes a spring that resists movement of the pivot point of the upper link to the seedling planting device toward the traveling body; The configuration includes a spring that resists movement in a direction away from the aircraft body.

That is, as described above, the present invention has a seedling planting device having a float, a seedling stand, and a planting mechanism mounted on a traveling machine so as to be movable up and down by a pair of upper and lower links, and By providing a lifting mechanism for raising and lowering the seedling planting device, the height position of the seedling planting device relative to the traveling body can be adjusted from the tiller where the wheels of the traveling body touch the ground to the field where the float of the seedling planting device touches the ground. On the one hand, it is possible to arbitrarily set the optimal state according to the plowing depth.1.In the upper link of the pair of upper and lower links, the pivot point between the upper link and the seedling attachment is arranged along the length direction of the upper link. By providing a flexibility mechanism that allows the traveling machine to move back and forth within a certain range, when the traveling machine pitches due to unevenness of the plowing platform, etc., the pitching of the traveling machine is caused by the presence of the flexibility mechanism. In other words, since the seedling planting device does not pitch in accordance with the pitching of the traveling machine, the attitude of the seedling planting device with respect to the field scene changes greatly depending on the pitching of the traveling machine. There is no such thing.

However, the flexibility mechanism includes a spring that resists movement of the pivot point of the upper link to the seedling planting device toward the traveling vehicle, and a spring that resists movement of the pivot point away from the traveling vehicle (particularly). By providing a resisting spring, both springs act to prevent the seedling planting device from tilting toward the traveling body or away from the traveling body due to slight irregularities in the field. Therefore, it is possible to prevent the seedling planting device from making frequent and fine pitching movements due to slight irregularities in the field, and it is possible to stably maintain the sliding posture of the seedling planting device with respect to the field. This has the effect of extremely stabilizing the

Next, the present invention will be explained with reference to the drawings of the embodiments. In the drawings, 1 is a traveling aircraft in which a front aircraft frame 3 and a rear aircraft frame 4, each equipped with a pilot seat 2, are connected horizontally by a vertical axis 5. There are swing arms 6.6 on both sides of the front machine frame 3.
Front wheels 8, 8 are mounted on both sides of the rear machine frame 4 via swing arms 7.7, and rear wheels 9, 9 are mounted on both sides of the rear machine frame 4 via swing arms 7.7.
The engine 10 mounted on the rear machine frame 4 drives the rear wheels 9, 9, and also supplies power to a transmission (not shown) in the front machine frame 3 via an intermediate shaft 27 provided in the vertical shaft 5. The transmission is configured to drive the front wheels 8, 8 and move forward in the direction of arrow a.
Attached to 2 <...The vertical shaft 5 is rotated through a chino etc. in the transmission case 13 by the rotational operation of the steering wheel 11, and the bending angle of both the machine frames 3 and 4 is adjusted to thereby steer the machine. ing.

Reference numeral 14 denotes a multi-row seedling planting device (the figure shows the case of 4-row planting) located in front of the front machine frame 3;
4 is a drive mission case 16 to which power is transmitted from the mission in the front machine frame 3 via a flexible shaft 15; a seedling mounting stand 17 is attached to the case 16; and a mechanism 1 for vertically swinging planting.
8 and a float 19, and a pair of left and right lower links 21, 21 at the lower rear end of the drive transmission case 16,
A pair of left and right upper links 20.20 are pivotally attached to the upper part of the rear end, and the ends of the upper and lower links 21.20 are pivoted to the front machine frame 3, so that the seedling planting device 14 can run. It is attached to the fuselage 1 so that it can move up and down.

Reference numeral 22 denotes an elevating shaft that is pivotally supported on the handle table 12 on the front machine frame 3, and elevating arms 23.22 are fixed to both ends of the elevating shaft 22.
Connect the tip of 23 and both lower links 21° 21 with a rod 24
The seedling planting device 14 can be moved to a large extent relative to the traveling body 1 by connecting the lifting shaft 22 to the vertical shaft 22 and rotating it by manual operation such as foot operation or by power operation such as hydraulic pressure. It is configured to go up and down.

Note that 26 is a spring for biasing the lifting shaft 22 to rotate in the upward direction of the seedling planting device 14, and this spring may be configured as a torsion spring fitted over the lifting shaft 22, or It may be provided between the link 21 or the drive mission case 16 and the traveling body 1.

As shown in FIG. 3, the rain upper link 20.20 is composed of a rod 20a on the traveling body 1 side and a rod 20b on the seedling planting device 14 side.
The rod 2 on the traveling body 1 side is placed inside the cylindrical body 20c fixed to b.
The tip of the rod 20a is slidably inserted into the rod 20a inside the cylinder 20C, and the rod 20a is inserted into the cylinder 2Q.
By fixing the flange body 20d that prevents c from coming off, the pivot point between the upper link 20 and the seedling planting device 14 can be moved forward and backward relative to the traveling body within a certain range along the length direction of the upper link 20. A compression spring 20e is provided in the cylindrical body 20c to bias the rod 20a on the traveling body 1 side in a direction to draw the rod 20a into the cylindrical body 20c. , a compression spring 20f is provided that biases the rod 20a on the traveling body 1 side in the direction of protruding from the cylindrical body 20c.

When the seedling planting device 14 is lowered so that its float 19 touches the field and the traveling body 1 travels forward, the seedlings are planted on the field after the ground is leveled by the float 19.
Planted by 8.

Even if the traveling machine body 1 pitches during this rice planting work, this pitching is not transmitted to the seedling planting device 14 side due to the action of the accommodation mechanism 20g in the upper link 20.
The seedling planting device 14 does not pitch significantly in response to the pitching of the traveling body 1.

If the seedling planting device 14 exhibits a tendency to tilt in a direction in which the pivot point of the upper link 20 to the seedling planting device 14 moves away from the traveling body 1 due to slight irregularities in the field, the The compression spring 20e that biases the rod 20a on the machine body 1 side in the direction of drawing it into the cylinder body 20c suppresses the above-mentioned tilting tendency, and the seedling planting device 14
If the pivot point of the upper link 20 to the seedling planting device 14 tends to move toward the traveling body 1 due to slight irregularities in the field, the rod 20a on the traveling body 1 side may be Since the compression spring 20f biasing in the direction protruding from the seedling planting device 20c suppresses the above-mentioned tilting tendency, frequent and fine pitching of the seedling planting device 14 is reduced.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a side view of the rice transplanter, FIG. 2 is a partially cutaway plan view of FIG. 1, and FIG. 3 is a detailed sectional view of the upper link. 1... Traveling body, 8... Front wheels, 9.
... Rear wheel, 14 ... Seedling planting device, 17.
... Seedling stand, 18 ... Planting is done by mechanism, 10
...Float, 20...Top link,
21...Lower link, 20g...Accommodation mechanism, 20e, 20f...Compression spring, 22...
... Lifting axis, 23... Lifting arm.

Claims (1)

[Claims] 1. A seedling planting device having a float, a seedling stand, and a planting mechanism is attached to a traveling body supported by front wheels and rear wheels so as to be movable up and down by a pair of upper and lower links, and In the riding-type transplanter, which is provided with a lifting mechanism for raising and lowering the seedling planting device, the upper link of the pair of upper and lower links has a pivot point between the upper link and the seedling planting device. A flexibility mechanism is provided that allows for forward and backward movement relative to the traveling body within a certain range along the length direction, and the flexibility mechanism includes a mechanism in which the pivot point of the upper link to the seedling planting device approaches the traveling body. (A riding type rice transplanter characterized by being provided with a spring that resists the movement, and a spring that resists the movement of the pivot point in a direction away from the traveling body.