JPH0683609B2 - Seedling planting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is used for a seedling planting machine used in a paddy field.

[Conventional technology]

As a conventional example of this type, as shown in JP-A-57-65117, three floats are arranged side by side in the left-right direction, and seedlings are planted by vertically moving the front parts of the left and right side floats. A vertical movement control mechanism that holds the position of the attached device with respect to the mud surface constant is provided, and a control mechanism that corrects the vertical movement control with a sensor that detects the hardness of the mud attached to the front part of the left and right side floats is provided. There is a seedling planter.

[Problems to be Solved by the Invention]

However, in the above-mentioned conventional example, the position of the planting device with respect to the mud surface is kept constant by the left and right side floats where the front part of the float is located rearward of the central float where the front part of the float is located closest to the front of the machine. Because it is a vertical movement control mechanism that
The preceding central float is affected by the mud water that pushes it to the left and right, and its control cannot be performed properly.Besides, a sensor that detects the hardness of the mud is attached to the front part of the float on the left and right sides. , The preceding central float pushes the mud water to the left and right, and the left and right side floats push the mud water to the front, causing the malfunction that cannot be performed properly. Was not able to be planted.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, the present invention provides a plurality of floats in the lower part of a machine body in which a plurality of planting devices are mounted side by side in the left-right direction, and the front part of the float is located at the most front side of the machine body. In a seedling planting machine that controls the position of the planting device by vertically moving the front part of the float to move vertically, the front part is pivotally attached between the floats that are arranged side by side in the lower part of the machine body. A rod-shaped sensor that detects the hardness of the mud that is supported and whose rear part is formed at the open end is provided, and when the rear part of the rod-shaped sensor operates upward, it is difficult for the mud in the front part of the sensor float to move upward. On the contrary, when the rear part of the rod-shaped sensor operates downward, the seedling planting machine is characterized in that the front part of the sensor float is easily moved upward by the mud.

[Action effect]

According to the present invention, the front part of the float controls the position of the planting device up and down by operating the drive device by the up and down movement of the front part of the sensor float, which is located closest to the front of the body. It is possible to detect the situation to be controlled at the foremost part of the robot and to perform appropriate vertical movement control.However, especially when the rear part of the rod-shaped sensor moves upward, the upward movement due to mud in the front part of the sensor float However, when the rear part of the rod-shaped sensor is operated downward, the mud in the front part of the sensor float facilitates upward movement, so the sensor float can be adjusted according to the hardness of the mud in the field. Appropriate upward movement of the front part is performed, the vertical movement control of the aircraft becomes accurate, and proper seedlings can be planted.

In addition, by installing a rod-shaped sensor between the floats that are arranged side by side in the lower part of the machine, it is possible to detect the hardness of mud in a stable state that is relatively unaffected by the floats that are arranged side by side. The control becomes stable.

Further, since the sensor for detecting the hardness of the mud is formed in a rod shape, it is difficult for foreign matters such as straw floating in the field to be entangled,
Further, the control becomes accurate.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

As shown in the drawings, a transmission case 5 and a planted transmission case 7 are fixed to the front and rear of the tubular frame 1 to form a machine body. The tip ends of a pair of left and right chain cases 9 are rotatably attached to the left and right of the transmission case 5, wheels 3 are provided at the rear ends of the transmission case 5, and an engine 6 of the engine 6 provided at the front of the transmission case 5 is provided. The rotation reaches the respective wheels 3, 3 via the transmission case 5 and the transmission devices in the left and right chain cases 9, 9 and rolls these wheels 3, 3 on the cultivator to propel the machine body. It is like this.

A pair of left and right cylinders 16 and 16 are provided on both sides of the engine 6, and the piston rods projecting rearward therefrom
21 ・ 21 is connected to the upper end of arm 22 ・ 22 protruding from each chain case 9 ・ 9, and piston rod 21 ・ 21
When the chain 21 appears and disappears, the respective chain cases 9 and 9 rotate about the horizontal axis of the front end portion to move the rear end wheels 3 and 3 up and down.

A pair of left and right handles 8, 8 extends obliquely upward from the rear lower end of the planted transmission case 7, and a seedling table 11 inclined in the same direction is attached to the handle 8 so that it can move in the left and right directions. There is. The seedling placing table 11 is formed so that four mat-like seedlings can be placed side by side, and can be reciprocated left and right by the power in the planting transmission case 7.

Four planting devices 10 ... are attached to the planting transmission case 7 at equal intervals in the rearward direction, and the power inside the planting transmission case 7 causes each tip to turn up and down in a long loop curve when viewed from the side. Then, when descending, it passes through the lower end of the seedling placing table 11, one seedling worth of seedlings is cut off from the end of the mat-like seedling on this, and is planted in the mud below. 3 floats 12 ・ 12 ・
12 are attached to the side of the planting transmission case 7 so that the planting device 10 ... Levels the mud surface where the seedlings are planted in advance and supports the rear end of the airframe.

A pair of left and right sensor floats 2.2 are attached to the front part of the machine body so as to rotate around the rear end shafts 26.

When the levers 14 and 14 are fixed to the rotary type switching valve 15 and 15 and the tips of the levers and the intermediate portion of the sensor float 2.2 are linked by the link rods 13 and 13, the tip of the sensor float 2.2 rises. , The connecting rod 13 ・ 13 pushes the lever 14 ・ 14 clockwise to turn the switching valve 15 ・ 15, and the oil discharged from the pump (not shown) is supplied to the left chamber of the cylinder 16 ・ 16. The piston rods 21 and 21 project to the right (rear) to push the check case 9 and 9 clockwise and push down the wheels 3 and 3 to lift the machine body. Therefore, contrary to the above, when the tip of the sensor float 2.2 falls, the connecting rods 13 and 13 pull the levers 14 and 14 counterclockwise, the switching valves 15 and 15 are switched, and the pump is discharged. Oil is supplied to the right chamber of the cylinder 16 ・ 16, the piston rod 21 ・ 21 is pulled in, and the chain case 9 ・ 9
Rotates counterclockwise, the wheels 3 and 3 go up, and the aircraft descends.

When the depth of the cultivator changes simultaneously with respect to the mud surface, the left and right wheels 3 and 3 simultaneously move up and down as described above, but the cultivator tilts left and right and the left and right wheels 3
When the vehicle body is tilted by moving the 3 up and down in the opposite direction, the inclination of the vehicle body is corrected by moving the respective wheels 3 up and down in the opposite direction. Incidentally, when the wheel 3 on one side enters the depth or gets on a high place and the body tilts, similarly, only the wheel 3 on that side moves up and down to correct the tilt. In this way, the switching valve 15, 15 and the cylinder 16, 16 constitute a drive device.

A rod-shaped sensor 17 is located between the left and right sensor floats 2 and its tip is at the tip of the right sensor float 2 on the horizontal axis.
It is rotatably attached at 27 and comes in contact with mud to move forward. A pair of vertical arms 18 ・ 18 are rotatably attached to the rear of the levers 14 ・ 14 by a horizontal shaft 23 integrated therewith, and a lever 24 extending upward from this and a lever 25 at the tip of the sensor 17 are connected by a wire. The arms 18 are rotated clockwise when the rear portion of the sensor 17 is rotated counterclockwise by being connected by 20. A pair of sensitivity springs 19
・ 19 is mounted between each arm 18 ・ 18 and the lower rear part of the lever 14 ・ 14. If the mud between the sensor floats 2 and 2 is hard, the rear end of the sensor 17 moves upward to a position higher than the standard position, the lever 25 rotates forward, and the wire 20 pulls the arms 18 and 18 backward. , Sensitivity spring 19
Pull back 19 to increase its tension, and the rod 13 ・ 13 pushes the tip of the sensor float 2 ・ 2 strongly,
The tip of 2 pushes back the upward force, making it difficult for the front part of the sensor float 2.2 to move upward. On the contrary, when the mud between the sensor floats 2 and 2 is soft, the rear end of the sensor 17 goes deep into the mud and moves downward.
The wire 20 is loosened, the arms 18 and 18 fall forward, the sensitivity springs 19 and 19 are loosened, and the pushing down force of the sensor float 2.2 by the rods 13 and 13 is weakened.
-The front part of 2 can be moved up with a small force (it easily moves up).

Therefore, the sensor 17 is formed in a rod shape and is provided between the sensor floats 2 mounted side by side in the left-right direction of the machine body, so that foreign matters such as straw floating in the field are unlikely to be entangled.
It is possible to detect the hardness of the mud while being supported stably in the left and right directions, and the upper movement of the sensor float 2 front part according to the hardness of the mud in the field is performed, and the vertical movement control of the machine becomes accurate. , Appropriate planting of seedlings can be done.

[Brief description of drawings]

FIG. 1 is a side view of a seedling planting machine according to the present invention, and FIG. 2 is a plan view thereof. The symbols in the figure are as follows. 2 …… Sensor float, 3 …… Wheels 7 …… Plant transmission case, 10 …… Planting device 11 …… Seedling table, 12 …… Float 16 …… Cylinder, 17 …… Sensor 19 …… Sensitivity spring

Claims (1)

[Claims] 1. A plurality of floats are provided in a lower portion of a body in which a plurality of planting devices are mounted side by side in a lateral direction, and a front portion of the float is provided for vertical movement of a front portion of a sensor float located closest to the front side of the body. In a seedling planting machine that controls the position of the planting device up and down by operating the drive device, the front part is pivotally supported between the floats that are arranged side by side in the lower part of the machine body, and the rear part is formed at the open end. A rod-shaped sensor for detecting the hardness of softened mud is provided, and when the rear part of the rod-shaped sensor operates upward, it becomes difficult for the mud in the front part of the sensor float to move upward, and conversely A seedling planting machine characterized in that, when the rear part operates downward, the upward motion of the front part of the sensor float is facilitated by mud.