JPH0354525B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a seedling planting machine used in paddy fields, and is intended to equalize the horizontal planting depth of seedlings.

(Conventional technology) When a seedling transplanter tilts sideways while working in a paddy field,
The planting depths of the left and right seedlings are different, which is not favorable for growth.

The applicant is JP-A-49-42444 and Utility Model Publication No. 51-
49301, a float-type detection device installed on the outside of a pair of running wheels detects the horizontal inclination of the aircraft, and in response to the signal, the drive device moves the left and right running wheels up and down, thereby detecting the horizontal inclination of the aircraft. and
We have proposed a system in which a drive device moves the running wheels up and down based on signals from a detection device installed within the width of a pair of running wheels.

(Problem to be solved by the invention) In the former case, since the detection float is located outside the running wheels, the width is wide and even a slight inclination can be detected as a large movement, so the operation is smooth and effective. However, because it is located outside the running wheels, if you drive incorrectly, it will collide with the ridge and be damaged. Seedling transplanters operate intensively during the short transplanting season, so
Even if the machine breaks down as described above, the time for repair is limited, and work continues for the rest of the season with the automatic device that corrects the horizontal tilt kept off. The latter, which is provided inside the running wheel, is protected by the running wheel and is prevented from being damaged, but it does not operate smoothly.

In this invention, when the detection device on the outside of the running wheel is damaged, the drive device is activated by the detection device on the inside, and the seedling planting machine is operated throughout the season without stopping the rolling device.

(Means for Solving the Problems) That is, the present invention includes a seedling value device provided at the rear of the machine body and having a plurality of horizontally arranged planting rods 14, 14, etc., and a tiller plate provided on the left and right sides of the machine body. It is equipped with running wheels that roll on top, a drive device that moves the running wheels up and down, and two detection devices that detect the lateral tilt of the aircraft. A drive device is provided to move the running wheels up and down to correct the lateral inclination of the aircraft, and one of the detection devices is provided within the width of the left and right running wheels, and the other one is installed above the mud surface. This seedling transplanter is characterized by being comprised of a pair of sliding floats and placed outside the running wheels.

(Function) Since the present invention is configured as described above, when this seedling transplanter is operated in a paddy field, the machine moves forward while the pair of running wheels rolls on the tiller. At this time, the planting rods 14, 14... are operated to transplant the seedlings onto the mud surface, and the left and right floats, which are one of the detection devices, slide on the mud surface outside the traveling wheels.

If there is a horizontal movement in the vertical direction of the tiller, the left and right running wheels are rolling on the tiller, causing the machine to tilt sideways. Then, since the left and right floats are sliding on the mud surface, they move closer to or away from the aircraft depending on the slope, so these floats send signals to the drive device to move the traveling wheels up and down, causing the wheels to move up and down. to correct the lateral tilt of the aircraft.

During the season, if one of these floats on the outside of the running wheel collides with a ridge and a failure occurs in the float or its signal system, a detection device located within the width of the other running wheel detects the tilt of the aircraft. Then, the drive device moves the traveling wheels up and down, corrects the lateral inclination of the machine body, and makes the lateral planting depth by the planting rods 14, 14, . . . uniform.

(Effect) As described above, according to this invention, the seedling transplanter has two
Since it has two detection devices, even if one of the detection devices malfunctions, the remaining one will operate to correct the horizontal tilt of the machine, which is useful during the season for seedling transplanters whose work is concentrated in a short period of time. It is possible to operate without repairing any malfunctions.

In addition, the float for detection on the outside of the running wheel is
The vertical movement of the aircraft is large relative to the tilt of the aircraft, and it is effective because it can quickly catch this tilt, but because the running wheels are on the outside, there is a high risk of collision with ridges or other surfaces, resulting in frequent failures. In this invention, the remaining one detection device is located within the width of the pair of running wheels and is protected by the running wheels, so that it can be operated effectively throughout the season.

(Example) Next, embodiments of the invention will be described.

1 is the aircraft body, as shown in Figures 1 and 2.
It has a structure in which a traveling transmission case 2 and a planting transmission case 3 are fixed at the front and rear, and an engine stand 4 is attached to the front part of the traveling transmission case 2.
5 indicates the engine, and 6 indicates the bonnet.

Reference numerals 7 and 8 are chain aces, which extend rearward from both sides of the traveling transmission case 2 and rotate around a front axis.

Reference numerals 9 and 10 denote running wheels, which are provided outside the rear ends of the left and right chain cases 7 and 8.

Reference numerals 3a and 3b denote outer planting transmission cases, which are fixed to the outer ends of cylindrical cases 3c and 3d extending outward from the planting transmission case 3.

Reference numeral 11 denotes a rear case, which is attached to the rear end of the planting transmission case 3.

12 is the control lever, 13 is the seedling tank, 14, 14...
is a planting rod.

15 and 16 are driving devices, as shown in FIG.
The center of a balance rod 18 is rotatably attached to the tip of the engine stand 4 with a vertical pin 17, and the base is elastically movable on both sides by springs 19 and 20 so that it can be pushed rearward and elastically supported. The cylinders 15a, 16a and the base are attached via tools 21, 22, and the pistons 15b, 16 protrude rearward from the cylinders 15a, 16a.
The rear ends of b are connected to arms 23, 24 that protrude upward from chain cases 7, 8, and pistons 15b, 1
The rear end sides of the chain cases 7 and 8 are provided so as to move downward when the chain cases 6b start to extend.

The drive devices 15 and 16 shown in the figure are operated by the hydraulic circuit shown in FIG. 4. That is, 25 and 26 are hydraulic pumps, 27 and 28 are hydraulic switching valves, and 29 is a hydraulic tank, and the left and right drive devices 15 and 16 are independently operated by the left and right hydraulic pumps and hydraulic switching valves, respectively. It is becoming more and more like this.

30 and 31 are valve switching devices, as shown in FIG.
Upper and lower middle portions of the bases of the valve shafts 34, 35 of the valve cases 32, 33 are fixed.

Reference numerals 36 and 37 indicate one detection device, which is composed of a left middle float and a right middle float, and is connected to the running wheels 9 and 10.
They are arranged side by side at the front part between them, the rear end is rotatably attached to the fuselage 1, and the front end is configured to move up and down.

Reference numerals 38 and 39 designate another detection device, which is composed of a left outer float and a right outer float, and is attached to an arm with a pin located outside the drive wheels 9 and 10 and whose rear part is adjusted up and down. The central portion is suspended by links to transmission cases 3a and 3b with external planting. 38a and 39a are depressed portions.

Reference numerals 40 and 41 denote wheel mark erasing floats, which are attached to both ends of a gate-shaped seesaw rod 42 that is rotatably provided at the rear end of the rear transmission case 11.

43 and 44 are rods, as shown in FIG.
0 and 31 are connected to each other through a long hole.

45 and 46 are rotating cylinders, and chain cases 7 and 8
It has arms 49 and 50 that extend outward and rearward through pins 47 and 48 that are fixed on the rotation axes of the left and right outer floats 38 and 3 in their respective elongated holes.
The pins 53 and 54 of the brackets 51 and 52 of No. 9 are inserted and rotated by the vertical movement of the outer floats 38 and 39. Rotating arms 55 and 56 extend upward from inside the rotating shafts 45 and 46, and their tips reach the sides of the traveling mission case 2 by detouring above the chain cases 7 and 8.

Reference numerals 57 and 58 denote rotating plates, which are rotatably attached to the upper bracket 59 of the traveling mission case 2 with pins 60, and whose lower ends are connected to the rotating arm 5.
It is connected to the tips of 5 and 56 with pins and elongated holes.

61, 62 are rods that connect the rotating plates 57, 58 and the valve switching tools 30, 31, and the rods 6 are inserted into the long holes 30a, 31a of the valve switching tools 30, 31.
1, 62 are bent and fitted, and when the left and right outer floats 38, 39 move upward beyond a certain level and the rods 61, 62 are pulled rearward, the valve switching tools 30, 3
1 is provided so that it can be rotated.

Reference numerals 65 and 66 are springs for adjusting sensitivity, and arms 69 and 70 are rotatably attached to a bracket 67 on the engine stand 4 with pins 68, and the arms 69 and 70 are connected to the valve switching tools 30 and 31. This left arm 69 is connected by a wire 72 to a sensitivity adjustment lever 71 attached to the control rod 12 side, so that the tension of the springs 65 and 66 can be adjusted.

73 shown in FIGS. 2 and 3 is a wire for manually switching the hydraulic switching valve by forcibly pulling the left and right rotating plates 57, 58 at the same time, and is connected to the hydraulic operating lever 74 in FIG. ing. and,
Normally, this wire 73 is operated in a relaxed state.

In the figure, 77 and 78 indicate preliminary seedling stands.

The seedling transplanter configured in this way has a seedling tank 12.
When the seedlings are placed on the preliminary seedling stands 77 and 78 and each part is driven by rotation with the engine 5, the traveling wheels 9 and 1
0 rolls on the plowing platform to propel the body 1, and each float 36, 37, 38, 39, 40, 41 slides on the mud surface.

Then, the seedlings are divided and taken out from the seedling tank 13 in which the planting rods 14, 14, . . . move from side to side, and inserted into the mud surface.

In this way, the work of transplanting the seedlings proceeds,
For example, when the left tiller reaches a shallow place with respect to the forward direction of the machine body 1, the left running wheel 9 rises. Then, the fuselage 1 tilts upward to the left, and the left middle float 36 and the left outer float 38 slide on the mud surface, so they are lower and farther apart from the fuselage 1. If the inclination of this aircraft 1 exceeds the specified range, the left center float 3
6 pulls down the rod 43, the valve switching tool 30 turns the valve shaft 34 counterclockwise, the hydraulic switching valve 27 returns the oil in the cylinder 15a to the hydraulic tank 29, and the piston 15b returns to the cylinder 15a. , the rear end of the chain case 7 rises and the running wheels 9 rise. That is, the left and right running wheels 9, 10 are vertically displaced in accordance with the lateral inclination of the tiller, and the inclination of the machine body 1 is corrected. In addition, at this time, the left outer float 3
8 also moves downward with respect to the fuselage 1, but the signal is transmitted through the tip of the left outer float 38, the arm 49, the rotating cylinder 45, the rotating arm 55, the rotating plate 57, and the rod 61 in this order. Turn the valve switching tool 30 as described above. Therefore, the hydraulic switching valve 27 operates with the left middle float 36 and the left outer float 38.

Conversely, when the left tiller of the machine body 1 reaches a deep place, the left traveling wheel 9 lowers, contrary to the above. Then, the aircraft body tilts downward to the left, and the left center float 36 and the left outer float 38 approach (rise) to the aircraft body 1.

When the inclination of the machine body 1 exceeds a predetermined range, the tip of the left center float 36 pushes up the rod 43, and the valve switching tool 30 turns the valve shaft 34 clockwise.
The hydraulic switching valve 27 sends the oil discharged by the hydraulic pump 25 into the cylinder 15a, and the piston 15b
is pushed out, the arm 23 rotates the chain case 7, the running wheels 9 lower and the left side of the fuselage 1 rises, correcting the inclination of the fuselage 1. In addition, the left outer float 3
8 is also transmitted to the valve switching tool 30 through the same path as described above.

This also applies to cases where there is up-and-down movement to the right of the tiller, or where there is up-and-down movement to the left and right.

If the outer floats 38 and 39 collide with a ridge during the work and the signal path and other parts from now on are out of order, the hydraulic switching valves 27 and 28 are activated by signals from the middle floats 36 and 37. In addition, in this seedling transplanter, the running wheels 9 and 10 move up and down above and below the floats 36, 37, 39, and 40, so even if the tiller moves up and down in the forward direction of the machine, it will not move up and down accordingly. By moving the running wheels 9 and 10 up and down, the body 1 can be maintained at a predetermined height relative to the mud surface.

In particular, this seedling planting machine has a pair of running wheels 9, 10.
Since it is equipped with two detection devices inside and outside to detect horizontal inclination, even if one breaks down, the work for that season can be completed using the other one. Furthermore, the outer one of the pair of running wheels 9, 10 allows the aircraft 1 to accurately catch the inclination, while the other one is protected by the running wheels 9, 10, so there is less risk of damage and reliability. expensive.

[Brief explanation of drawings]

Fig. 1 is a side view of a seedling transplanter according to the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a partial slope view thereof,
FIG. 4 is a hydraulic circuit diagram thereof. The symbols in the figure are as follows. DESCRIPTION OF SYMBOLS 1... Airframe, 9... Running wheel, 10... Running wheel, 14... Planting rod, 15... Drive device, 16...
...Drive device, 36, 37...Detection device, 38, 3
9...Detection device.

Claims (1)

[Claims] 1. A seedling planting device installed at the rear of the machine body and having a plurality of horizontal planting rods 14, 14..., running wheels installed on the left and right sides of the machine body that roll on the tiller, and a device that moves the running wheels up and down. It is equipped with a drive device that detects the horizontal tilt of the aircraft, and two detection devices that detect the horizontal tilt of the aircraft. one of the detection devices arranged to correct the tilt;
A seedling transplanter comprising a pair of floats, one of which is provided within the width of left and right running wheels, and the other float that slides on a mud surface and is disposed outside of the running wheels.