JPH0444024Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a multi-planting arm in which a multi-planting claw case is used in a rotary planting device.

(Prior art) Conventionally, in a device having a rotary planting claw as seen in Japanese Patent Application No. 60-164863, a plurality of planting claw cases are interlocked and connected to each other, and these are connected by a planetary gear mechanism. Those that are connected to and driven by a rotary case use a common camshaft to operate the push levers of each planting claw case.

The planting claw cases are connected to each other by a connecting pipe to form a multiple planting arm.

(Problem to be solved by the invention) In the multi-connected planting arm as described above, in order to connect the planting claw cases with each other using the connecting pipe, the connecting flange of the connecting pipe is used to connect the planting claw cases. are connected with bolts.

In this case, in order to ensure the rigidity of the rotary unit and the straightness of the rotary unit, it is necessary to provide wide intervals between the bolts of the connecting flange portion.

In the patent application No. 60-164863, the planting claws are displaced laterally with respect to the base of the planting claw case, so even if the distance between the bolts on the connecting flange part is widened, the planting claws and the bolts cannot be connected. Don't interfere. However, when viewed from the side, the rear of the front row of claw cases and the tips of the rear row of claws overlap in the front-rear direction, and simply increasing the spacing between the bolts will prevent the bolts from intersecting with other planted claw cases.
The positional relationship may be such that the claws of the planting claw case and the bolts interfere.

(Means for solving the problem) Therefore, the technical problem of this project is to obtain a multiple planting arm that has both rigidity and straightness. The technical means of the present invention to solve this problem is to interlock and connect a plurality of planting claw cases each having a rotary planting claw, and to connect and drive these to a rotary case with a planetary gear mechanism. In this case, the rear part of the nail case in the front row and the tip of the nail in the back row overlap in the front-rear direction when viewed from the side. It is constructed so that the claws of the claw case pass through it.

(Effect of the invention) According to this technical means, even if the rear end of the front nail case and the tip of the rear nail case overlap in the front-rear direction when viewed from the side, the rear part of the planted nail case becomes concave and other Since the claws of the planting claw case are configured to pass through the concave shape, the spacing between the bolts can be maintained even at positions where the planting claw case mounting bolts interfere with the claws of other planting claw cases when viewed from the side. It can be taken widely.

Therefore, the rigidity of the rotary unit is ensured, and the straightness of the rotary unit is also ensured.

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

A driving shaft is driven from a transverse feed gear case of a seedling stand (not shown) via a sprocket and chain.
The drive shaft 2 is driven by a chain stretched between the sprocket and the sprocket 3 of the drive shaft 2 inside the planting drive case 1.

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 planting claw cases 13R, 13R' at the left end, as described later, and the planting claw cases 13L, 13L' at the right end, which are close to the drive arm 4. is supported by a cam drive shaft 6 supported by a drive arm 4.

The central planting claw cases 13S and 13S' are connected to the left and right planting claw cases by a connecting pipe 14 as will be described later.

In addition, 15 in FIG. 2 is a sun gear phase adjustment member, and is fixed to the frame 16 in which the planting drive case 1 is located.

Further, the left end of the cam drive shaft 6 is not connected to the shaft 11, and the right end is connected to the pin 3 with respect to the drive arm shaft 36.
They are joined by 5.

Next, each planted nail case will be explained.

In FIG. 4, a fixed claw 16 is attached to the planting claw case 13, and a push rod 18 that pushes out the pushing claw 17 reciprocates along a guide 19.

A spring 21 supported within the planting claw case 13 is in contact with the receiver 20 of the push rod 18, and always urges the pushing claw 17 in the pushing direction.

The push lever 22 that engages with the groove 20a of the receiver 20 swings about the fulcrum 23, but the protruding piece 24 of the push lever 22 swings with the cam 25, so that the push lever 22 is moved backward against the spring 21. let

Therefore, when the planting claw case 13 rotates with respect to the cam 25 of the cam drive shaft 6, the protrusion 24 swings on 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 claw case 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 planet 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 1
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 6, 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 a 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 with each other through the planetary gear shafts 11, 11 rotate in the opposite direction to the rotation direction of the rotary case 5. Claw case 13
rotates 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 After dividing one seedling from the seedling pine on the seedling stand with the tip of the claw, 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.

Now, in the plunger 26 fixed to the shaft 11,
A flange 27 of the planting claw case 13 is fixed with a bolt 28, and a flange 27 of each planting claw case 13 is fixed with a bolt 28 to flanges 29, 29 at both ends of the connecting pipe 14. In addition, a flange 31 is also provided on the shaft cylinder 30 or 14' on the side of the drive arm 4.
There is a flange 27 of the planting nail case 13 on this
are fixed with bolts 28.

The cam drive shaft 6 supports the planting claw case via a bearing a, and the shaft cylinder 30 is supported by the camshaft 6 via a bearing b.

In a side view, the front row claw case 13R', 1
3S', 13L' rear and rear row claw cases 13R, 13
The tips of the claws S and 13L are wrapped in the front and back direction, and the rear flanges 27 and 2 of each planting claw case 13
The space between 7 and 7 is formed into a concave shape 32.

As described above, even though the rear part of the front row of claw cases and the tip of the rear row of claws overlap in the front and back direction when viewed from the side,
The rear part of the planting claw case has a concave shape through which the claws of other planting claw cases pass, so that the bolts 28 and claws 16 can be seen in side view as shown in FIG. , 17, the distance between the bolts 28 can be widened even at positions where the bolts 28 interfere with each other.

In this way, since the distance between the bolts of the connecting flange portion can be widened, the rigidity of the rotary unit can be ensured, and the straightness of the rotary unit can be ensured.

Further, by making the rear part of the planting claw case 13 concave, it is possible to easily install a scraper 33 for removing mud attached to the tip of the claw, as shown in FIGS. 2 and 3. That is, the mud attached to the nail is removed by the scraper 33 within the nail tip upward trajectory at the rear of the planting nail case trajectory.

[Brief explanation of the drawing]

Fig. 1 is a cutaway front view of the proposed device, Fig. 2 is an external front view of the same as above, Fig. 3 is an explanatory diagram showing the relationship between the planting claw case and the planting claw, and Fig. 4 is an illustration of the planting claw case. The cross-sectional view and FIG. 5 are explanatory diagrams of the planting locus. 2... Drive shaft, 4... Drive arm, 5... Rotary case, 6... Cam drive shaft, 8... Sun gear, 10... Intermediate gear, 12... Planetary gear, 13
... Planting nail case, 14 ... Connection pipe, 16 ...
... Fixed claw, 17... Extrusion claw, 27... Flange,
28...Bolt, 32...Concave portion.

Claims (1)

[Scope of utility model registration request] A plurality of planting claw cases each having a rotary planting claw are interlocked and connected to each other so that they can be driven by being connected to a rotary case with a planetary gear mechanism. In a case where the rear part of the nail case and the tips of the nails in the back row overlap in the front-rear direction, the rear part of the planted nail case is formed in a concave shape so that the nails of other planted nail cases can pass through the concave shape. A multi-connected planting arm characterized by the following structure.