JPH0420171Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a planting arm of a rotary planting device.

(Prior art) A device that uses a planetary gear mechanism to drive a rotary planting claw, and in which the push-out claw of the rotary planting claw in the planting arm reciprocates with the push rod, The working push spring is an extension of the push rod.

(Problems to be Solved by the Invention) When a rotary case is provided with a plurality of planting arms as described above, there is a problem of interference between the planting arms when they rotate.

In particular, if the push spring that pushes out the push rod is located on an extension of the push rod, it is disadvantageous because the springs tend to interfere with each other.

From the planting performance, set the angle of the claw to the perpendicular line by θ in Figure 7.
This tendency becomes more noticeable when trying to increase the value.

(Means for solving the problem) Therefore, the technical problem of the present invention is to provide a rotary planting device that makes it easy to avoid interference between the planting arms attached to the rotary case. The technical means of the present invention to solve this technical problem is to drive the rotary planting claw using a planetary gear mechanism, and the extrusion claw of the rotary planting claw on the planting arm is pushed into the push rod. Therefore, in a reciprocating device, the push spring that acts on the push rod is positioned in front of the extension of the push rod, closer to the seedling stand.

(Effect of the invention) According to this technical means, the degree of freedom in determining the planting locus is increased because it is easier to avoid interference between the plurality of planting arm bodies attached to the rotary case.

In other words, the trajectory is larger than that of the conventional one,
Or the distance between the planetary gear axes can be made smaller.

(Example) The embodiments shown in the drawings will be described below.

To explain the conventional rotary planting device, in FIG. 3, it is driven by a chain stretched between the sprocket from the transverse gear case of the seedling stand (not shown) and the sprocket 3 of the drive shaft 2 in the drive chain case 1. Shaft 2 is adapted to be driven.

A drive arm 4 is directly connected to this drive shaft 2,
A cam drive shaft 6 is stretched between the drive arm 4 and the rotary case 5.

The rotary case 5 has a sun gear 8 fitted on a shaft 7, with which intermediate gears 10, 10 of intermediate shafts 9, 9 mesh, and planetary gears 12, 12 of shafts 11, 11 mesh with it. ing.

The shafts 11, 11 of the planetary gears 12, 12 are fixed to the left end planting arms 13R, 13R', and the right end planting arms 13L, 13L', which are close to the drive arm 4, are fixed to the drive arm 4. It is supported by a supported cam drive shaft 6.

The central planting arms 13S, 13S' are attached to the connecting pipes 14, 14 together with the left and right planting arms. Reference numeral 15 in FIG. 4 denotes a sun gear phase adjusting member, which is fixed to a frame 35 on which the drive chain case 1 is located.

Next, to explain each planting arm, the 6th
In the figure, a fixed claw 16 is attached to a case 15, and a push rod 18 that pushes out a push-out claw 17 reciprocates along a guide 19.

In the receipt 20 of the push rod 18, there is a case 1.
A spring 21 supported within 5 is in contact with the spring 21, and constantly biases the push-out claw 17 in the push-out direction.

The push lever 22, which engages with the groove 20a of the receiver 20, swings about the shaft 23, but the cam lever 24 of the push lever 22 swings with the cam 25, thereby retracting the push lever 22 against the spring 21. .

Therefore, when the planting arm 13 rotates relative to the cam 25 of the cam drive shaft 6, the cam lever 24 swings with the cam 25, causing the push rod 18 to reciprocate via the push lever 22.

Thus, the rotation of the drive arm 4 causes the rotary case 5 to rotate via the cam drive shaft 6, causing the planting arm 13 to rotate according to a closed loop curve.

As described above, the drive arm 4 and rotary case 5
A cam drive shaft 6 is stretched between the cam drive shaft 6 and the rotary case 5 can be rotated by the drive arm 4 via the cam drive shaft 6.

Intermediate gears 10, 1 in rotary case 5
0 has the same number of teeth as the sun gear 8, and the planetary gear also has the same number of teeth as the sun gear 8, so when the rotary case 5 rotates on the cam drive shaft 6, the frame 3
As the rotary case 5 rotates, the intermediate gears 10, 10 meshing with the sun gear 8, which is not rotatable relative to the rotary case 5, rotate in the same direction by the same rotation angle as the rotation angle of the rotary case 5.

These intermediate gears 10, 10, planetary gears 12, 1
The planetary gear shafts 11, 11 interlocked via the planetary gear shafts 11, 11 rotate in the direction opposite to the rotation direction of the rotary case 5 due to the rotation of the intermediate gears 10, 10, so that the planetary gear shafts 11, 11 that are interlocked via the planetary gear shafts 11, 11 rotate in the opposite direction to the rotation direction of the rotary case 5. Arm 13 is
It will rotate around the drive shaft 2 while facing the direction of the seedling platform, and during this rotating movement, when descending from top to bottom on the side facing the seedling platform, the planting claws will rotate. After dividing a single seedling from the seedling pine on the seedling platform at the tip, the seedling is planted in the field at the lower limit of descent.

Since the sun gear 8, intermediate gear 10, and planetary gear 12 are all eccentric as shown in FIG.
The closed loop of the motion trajectory of the nail tip is a closed loop curve with one side curved and the other side shaped like an oblique ellipse that is closer to a straight line. The trajectory of the movement becomes as shown in FIG.

By the way, according to the planting arm 13 as described above, the push spring 21 is on an extension of the push rod 18.

With this structure, since the moving trajectory of the tip of the nail is in the S direction, the planting arms tend to interfere with each other as shown in FIG. 5.

Therefore, as shown in Fig. 1, the push spring 21
is located in front of the seedling stand side from the extension line of the push rod 18.

The one shown is an extension line A of the push rod 18.
-The spring 21 is offset by l from the A line.

With the above configuration, since the motion trajectory of the tip of the claw is in the S direction, interference between the planting arms can be avoided as shown in FIG. 2. The S arrow in FIG. 2 indicates the locus of the tip of the nail.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the proposed device, Fig. 2 is an explanatory diagram showing the relationship between the planting arm and the rotary case, Fig. 3 is a sectional view of the multiple planting device, and Fig. 4 is an external view of the same as above. Fig. 5 is an explanatory diagram showing the relationship between the planting arm and the rotary case, Fig. 6 is a sectional view of the conventional planting arm, Fig. 7 is an explanatory diagram showing the planting locus, and Fig. 8 is an explanatory diagram showing the relationship between the planting arm and the rotary case.
The figure is an explanatory diagram showing a moving trajectory. 5... Rotary case, 13... Planting arm, 16... Fixed claw, 17... Extrusion claw, 18...
Pushyurotsudo, 21... Pushushubane, 22...
...Push lever, 24...Cam lever, 25...
…cam.

Claims (1)

[Scope of utility model registration request] In a device that uses a planetary gear mechanism to drive a rotary planting claw, and in which the push-out claw of the rotary planting claw on the planting arm reciprocates by a push rod, a push spring acting on the push rod, A planting arm of a rotary planting device, characterized in that it is positioned in front of a seedling stand side from an extension of a push rod.