JPH0420172Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is a seedling planting device that divides seedlings one by one from a seedling pine on a seedling stand and then plants them in a field. It is related to.

[Conventional technology]

Conventionally, this type of seedling planting device has been developed, for example, in Japanese Patent Application Laid-Open No.
As described in Publication No. 135512, a plurality of planting rods having split claws at the tips are attached to a rotating body that rotates by drive from a power source, and the tips of the split claws of each planting rod are attached to seedlings. A configuration is disclosed in which the device is configured to pivot in the vertical direction while remaining in a posture facing the direction of the platform.

The above publication also discloses that a fixed position stop clutch is provided for stopping a plurality of planting rods at a fixed position.

[Problem that the invention attempts to solve]

By the way, according to this type of seedling planting device, a plurality of planting rods also reciprocate up and down by one rotation of the rotating body, which has the advantage of being able to perform seedling planting work at high speed.

However, due to the weight of the rotating body and the planting rods attached to it, the rotational inertia becomes large, making it difficult to use a clutch that stops the plurality of planting rods all at once at a fixed position.
If it is turned OFF, a large load will be applied to the fixed position stop clutch due to the influence of the rotational inertia, which may damage the pawls of the clutch. There was a problem that it had to be made larger.

Therefore, the present invention focuses on the fact that each planting rod is equipped with a pushing tool for pushing the divided seedlings from the seedling stand into the field. By associating it with the OFF position of the stop clutch, the inertial force acting on the seedling planting device when the clutch is OFF is reduced,
The purpose is to provide a compact seedling planting device.

[Means for solving problems]

For this reason, the present invention attaches a plurality of planting rods equipped with forced planting type extrusion tools to a rotating body that is rotationally driven by power transmission from the drive source of the rice transplanter, and each planting rod is connected to the rotating body. In a seedling planting device equipped with a fixed position stop clutch that moves up and down with the rotation of the rotating body and stops each planting rod in a position above the field surface, each planting rod has a A guide shaft equipped with an extrusion tool that moves up and down along the dividing claws of the rod is provided to be slidable approximately parallel to the dividing claws, and the proximal end of the extrusion lever for moving the guide shaft up and down is provided on each side. The extrusion tool is brought into contact with the outer circumferential surface of the cam installed in the planting rod, and the extrusion tool moves downward toward the tip of the split claw near the lower limit of the planting rod. While the split claw is configured to rise toward the base end side, the OFF position of the fixed position stop clutch and the phase of each of the cams are set to a fixed position near the end position of the extruder on the planting rod during the rising stroke. It is configured so that the stop clutch is turned OFF.

〔Example〕

An embodiment of the present invention will be described below. In the figure, 1 is a transmission case in the body of a rice transplanter, and on both left and right sides of the transmission case 1, boss bodies 2 are horizontally oriented and approximately parallel to the seedling platform 10. A rotating shaft 3 that protrudes and is rotationally driven by transmission of power from an engine (not shown) mounted on the body of the rice transplanter is inserted into the boss body 2. At the protruding end of is an oval and hollow rotating body 4.
are fitted into each other, and each rotating body 4 is configured to be rotated in the right direction of arrow A when viewed from the side.

A sun gear 5 is disposed at the center of the rotary body 4 and is rotatably fitted into the boss body 2 and rotatable with respect to the rotary body 4. 1 by appropriate rotational phase adjusting means (not shown).

A camshaft 6 is attached to both the left and right ends of the rotary body 4 at equal distances L from the rotary shaft 3.
A hollow planting shaft 7 is rotatably fitted onto the camshaft 6, and one end of the planting shaft 7 is placed outside the rotating body 4. A dividing claw 9 is provided at the projecting end of each planting shaft 7 and extends toward the seedling platform 10.
A hollow planting rod 8 is attached at its base, while an intermediate shaft 11 is installed in the rotating body 4 at a position intermediate between the rotating shaft 3 and each planting shaft 7, and is rotatable parallel to both shafts. An intermediate gear 12 that meshes with the sun gear 5 and has the same number of teeth as the sun gear 5 is fitted onto each intermediate shaft 11 .

The intermediate gear 1 is disposed on the intermediate shaft 11.
An interlocking gear 13 having the same number of teeth as the interlocking gear 13 on the intermediate shaft 11 is fitted onto the planting shaft 7, and an interlocking gear 14 which has the same number of teeth as the interlocking gear 13 on the intermediate shaft 11 and is always in mesh with the interlocking gear 13 is fitted onto the planting shaft 7. By interlocking the intermediate shaft 11 and the planting shaft 7 with the interlocking gears 13 and 14, one rotation of the rotary body 4 causes the planting shaft 7 to rotate once in the direction opposite to the rotation direction of the rotary body 4. Configure it as follows.

On the other hand, one end of the camshaft 6 is inserted into each hollow planting rod 8 and the cam 15 is fixed thereto,
Each planting rod 8 is provided with a guide shaft 16 that extends substantially parallel to the dividing claw 9 and is slidable up and down, and a pushing tool 17 is fixed to the lower end of the guide shaft 16. An extrusion lever 18 is disposed inside the camshaft 8, and one end of the extrusion lever 18 is engaged with a slider 19 at the upper end of the guide shaft 16, while the base end of the extrusion lever 18 is positioned above the camshaft 6. A pin 20 is pivotally mounted at
1 is brought into contact with the outer circumferential surface of the cam 15 by the pressing force of the spring 22, and when the outer circumferential surface of the cam 15 comes near its lower limit, the extrusion lever 18 is rotated downward by the force of spring 22,
The extrusion lever 18 is configured in such a shape that it rotates upward against the force of the spring 22 within the section where each planting rod 8 is on its upward stroke, and furthermore, the phase of each cam 15 and the rotating body 4 are For example, the rotating shaft 3
of the fixed position stop clutch 23 of the planting rod 8 attached to the
The OFF position (the position where the rotational force to the rotary body 4 is cut off) is set to the position where all the planting rods 8 (in the embodiment, two planting rods 8, 8 sandwich the rotation shaft 3) and the rotation of the rotary body 4. (located 180 degrees apart from each other in the direction)
The OFF position of the fixed position stop clutch 23, which stops at a position above the field surface, is set so that the end position of the extrusion tool 17 on the planting rod 8 during the upward stroke substantially coincides. .

In the embodiment, a chain sprocket 24 is rotatably fitted over a pair of rotating shafts 3, 3 protruding from both left and right sides of the transmission case 1, and an appropriate power source is connected to the chain sprocket 24 via a chain 25. Drive rotation. On both the left and right sides of the chain sprocket 24, there are a drive side ratchet wheel 26 and a driven clutch body 27.
A fixed position stop clutch 23, 23 is provided.

That is, the driving side ratchet wheel 26, which rotates integrally with the chain sprocket 24, is rotatably fitted onto the rotating shaft 3, while the driven clutches are positioned facing the side surfaces of both the driving side ratchet wheels 26, respectively. The body 27 is spline-engaged with each rotary shaft 3 to rotate integrally and to be slidable along the axis of the rotary shaft 3, and each driven clutch body 27 is connected to the drive side ratchet wheel 26 by a spring 28. When the clutch pawls 27a and 26a protrudingly formed on the side surfaces of each driven clutch body 27 and drive side ratchet wheel 26 are engaged with each other,
Rotating bodies 4, 4 on both the left and right sides of the transmission case 1 are driven to rotate, and the wire 29 from the operating section of the rice transplanter is
When the clutch pin 30 connected to the drive side ratchet wheel 26 and the driven clutch body 27 is inserted, the clutch pin 30 comes into contact with the cam surface 27b of the driven clutch body 27, and the driven clutch body 27 is held by the spring 2.
The clutch pawl 27a separates from the clutch pawl 26a and power transmission to the rotating shaft 3 is interrupted.
Turn it off.

When the fixed position stop clutch 23 is turned OFF, the protrusion 21 of the pushing lever 18 moves to the cam 15.
The phase of the cam 15 is set so that the extrusion tool 17 is located in the vicinity of the end point 15a where the extrusion tool 17 rises toward the base end side of the dividing claw 9 among the locations where it contacts the outer circumferential surface.

In this configuration, when the rotating body 4 revolves around the rotating shaft 3 in the right direction of the arrow A, the transmission case 1
As the rotating body 4 revolves, the intermediate gear 12 meshing with the sun gear 5, which cannot rotate, rotates in the right direction of arrow B by the same rotation angle as the rotation angle of the revolution. Interlocking gears 13, 14
The planting shaft 7 interlocked with the intermediate gear 1
2 rotates in the left direction of the arrow C, that is, in the opposite direction to the revolution direction of the rotating body 4. Therefore, the planting rod 8 attached to the planting shaft 7 has its dividing claws 9 that hold the seedlings as shown in FIG. While facing the direction of the seedling platform 10, it rotates around the rotating shaft 3, and during this rotating movement, when the side facing the seedling platform 10 descends from top to bottom, the division occurs. After dividing only one seedling from the seedling pine on the seedling stand 10 with the tips of the claws 9, it is planted in the field area 32 near the lower limit of its descent.
It will rise even more.

During the revolution of the rotating body 4 in the right direction of the arrow A, each planting rod 8 rotates in the left direction of the arrow C with respect to the camshaft 6, that is, in the opposite direction to the revolution direction of the rotating body 4. , the extrusion lever 18 that comes into contact with the cam 15 of the camshaft 6 in each planting rod 8, when the tip of the dividing claw 9 enters the field area 32 at the lower limit of the planting rod 8, pushes the cam 15 out of the way. Stepped portion 15
Since it is rotated downward by the spring 22 based on the shape of c, the downward rotation of the extrusion lever 18 causes the extrusion tool 17 at the lower end of the guide shaft 16 to move as shown by one of the planting rods 8 in FIG. Then, the seedling is planted by moving downward toward the tip of the splitting claw 9 and pushing the seedling into the field area 32.

After this push-in planting is completed, during the ascending process in which the splitting claws 9 rise from the field scene 32, the fourth
As shown in FIGS. b to 6b, the protrusion 21 of the extrusion lever 18 is pushed up between the ascent start point 15b and the ascent end point 15a of the cam 15, and the extrusion tool 17 retreats from the tip of the split claw 9. It returns to its original position.

In order to stop all the planting rods 8 attached to one rotating body 4 at a position above the field surface 32, the clutch pin 30 is pushed into the fixed position stop clutch 23 to turn off the power transmission. .

At this time, approximately at the same time as the clutch pin 30 enters the bottom surface 27b portion of the cam surface of the driven clutch body 27 (see FIG. 4a), the pushing lever 1
The protrusion 21 of No. 8 is located at the rising start point 15b of the cam 15 (see FIG. 4b).

Next, as shown in FIG. 5a, the clutch pin 30 is
is in contact with the inclined surface 27c while the driven clutch body 2
7 is moved back away from the driving ratchet wheel 26, the protrusion 21 of the pushing lever 18 is pushed up between the rising start point 15b and the rising end point 15a of the cam 15, as shown in FIG. 5b. ,
The push-up load affects the rotating shaft 3, resulting in a so-called braking state in which the rotational inertia of the rotating body 4, which is the driven side, is reduced.

As shown in FIG. 6a, when the clutch pawl 27a of the driven clutch body 27 separates from the clutch pawl 26a of the drive side ratchet wheel 26 and power transmission is turned OFF, the protrusion 21 of the pushing lever 18 moves to the cam 15. (see FIG. 6b), the extrusion lever 1
The load associated with the pushing up of the driven body 8 reaches its maximum, reducing the speed of the rotating body 4 and significantly reducing the rotational inertia.
The impact force generated when the clutch pin 30 collides with the clutch pin 30 is also reduced, and the support structure for the clutch pin 30 and the entire fixed position stop clutch 23 can be made compact.

In the embodiment described above, a pair of fixed position stopping clutches 23 were provided to individually stop the rotating bodies 4 on both the left and right sides of the transmission case 1. Of course, it is also possible to adopt a configuration in which the left and right rotating bodies 4, 4 can be stopped at the same time at 23, and all the rotating bodies 4 in a plurality of transmission cases 1 arranged in parallel can be stopped at the same time and in the same rotational phase. like,
The present invention can also be applied to the case where a fixed position stop clutch 23 is provided on all power transmission shafts to the transmission cases.

In addition, the interlocking gears 13 and 14 having the same number of teeth that interlock and connect the intermediate shaft 11 and the planting shaft 7 are set so that the center O of each of these gears is eccentric by an appropriate dimension e from the rotation center of each of the shafts 11 and 7. If configured as an eccentric gear, the leftward rotation of the planting shaft 7 accompanying the rightward revolution of the rotating body 4 will be caused by the diameter of the eccentric interlocking gears 13 and 14 during one rotation. The rotation speed of the rotating body 4 will be faster or slower depending on the difference, so the time when the leftward rotation of the planting shaft 7 will be slower than the revolution of the rotating body 4 is the timing when planting The period when the rod 8 descends as it approaches the field scene 32 and the period when the rotation of the planting shaft 7 to the left becomes faster corresponds to the period when the planting rod 8 rises as it approaches the upper limit of its rise. By setting, each planting rod 8 rotates laterally to the left than the revolution of the rotary body 4 when descending to approach the field scene 32, changes its posture downward, and when approaching the upper limit of ascent. Because it moves further to the left than the revolution of the rotating body 4, it rotates on its own and changes its attitude upward,
The closed loop of the movement locus of the tip of the dividing claw 9 of each planting rod 8 becomes a closed loop curve 33 in the shape of an ellipse elongated in the vertical direction, as shown by the dashed line in FIG.

In the above embodiment, a planetary gear mechanism consisting of a sun gear 5, an intermediate gear 12, and interlocking gears 13 and 14 is used as a means for rotating the planting shaft 7 in the opposite direction by one rotation of the rotating body 4. Although shown, the interlocking gear 13 may be omitted and only the intermediate gear 12 may mesh with the sun gear 5 and the interlocking gear 14, and further,
By replacing the sun gear 5 with a pulley and using other means such as belt transmission between the pulley and the planting shaft 7, the planting shaft 7 rotates once in the opposite direction for each rotation of the rotating body 4. Needless to say, the number of planting rods 8 is not limited to two as in the above embodiment, but it is also possible to use a plurality of three or more planting rods equally divided in the circumferential direction. In the embodiment, the base end pivot pin 20 of the pushing lever 18 may be provided at a position below the camshaft 6.

[Functions and effects of the invention]

In the present invention, as described above, a plurality of planting rods are attached to a rotating body that rotates by power transmission from the power source of a rice transplanter, and during one rotation of the rotary body, it makes one rotation in the opposite direction of the rotating body. As a result, each planting rod moves up and down, so that each planting rod installed on one rotating body faces the direction of the seedling stand, as in the case of a conventional vertically swinging seedling planting device. Since it can pivot in the vertical direction while maintaining its posture, seedlings can be planted in a single seedling planting row at high speed without causing an increase in vibration by using a plurality of planting rods.

In the present invention, each of the planting rods is provided with a guide shaft equipped with a pushing tool that moves up and down along the dividing nails of the planting rod so as to be slidable approximately parallel to the dividing nails, and the guide shaft is The base end of the extrusion lever for vertical movement is brought into contact with the cam attached to each of the planting rods, so that the extrusion tool moves downward toward the tip of the split claw near the lower limit of the planting rod. By making contact with each other, by utilizing the rotation of each planting rod in the opposite direction to the revolution of the rotating body, forced planting can be performed when planting seedlings using each planting rod.

Moreover, in the present invention, a plurality of planting rods equipped with push tools for forced planting are moved up and down as the rotating body rotates, while all planting rods on the rotating body are positioned above the field surface. In a seedling planting device equipped with a fixed-position stop clutch, the extrusion lever comes into contact with the outer circumferential surface of the cam and the load applied to push up the extrusion tool on the planting rod during the upward stroke causes the rotation of the rotating body. Speed decreases. Use that point to turn off the fixed position stop clutch, so
At the time when the rotating body stops, the rotational inertia of the rotating body is reduced, and the load acting on the fixed position stop clutch can also be reduced.

Therefore, the strength and size of the fixed position stop clutch can be made compact, which has the effect of making the entire seedling planting device smaller and lighter.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which FIG. 1 is a partially cutaway side view, FIG. 2 is an enlarged cross-sectional view of FIG. 1, FIG. 3 is a cross-sectional view of FIG. 6 to 6 are explanatory diagrams showing the relationship between the fixed position stop clutch when it is turned off and the cam relative to the pushing lever. 1... Transmission case, 3... Rotating shaft, 4... Rotating body, 5... Sun gear, 6... Camshaft, 7... Planting shaft, 8... Planting rod, 9... Division claw, 10 ... Seedling stand, 11 ... Intermediate shaft, 12 ... Intermediate gear, 1
3, 14... Interlocking gear, 15... Cam, 16...
Guide shaft, 17... Pushing tool, 18... Pushing lever, 21... Protrusion, 20... Base end pin, 22...
Spring, 23...Fixed position stop clutch, 24...Chain sprocket, 26...Drive side ratchet wheel, 27...
...Driven clutch body, 29...Wire, 30...
Clutch pin.

Claims (1)

[Scope of utility model registration request] A plurality of planting rods equipped with extrusion tools for forced planting are attached to a rotating body that is rotationally driven by power transmitted from the drive source of the rice transplanter, and each planting rod is moved up and down as the rotating body rotates. In a seedling planting device equipped with a fixed-position stop clutch that rotates and stops each planting rod in a rotating body at a position above the field surface, each planting rod is provided with A guide shaft equipped with an extrusion tool that moves up and down is provided so as to be able to slide approximately parallel to the dividing claw, and the proximal end of the extrusion lever for moving the guide shaft up and down is installed inside each planting rod. The pushing tool is brought into contact with the outer circumferential surface of the split claw, and in the vicinity of the lower limit of the planting rod, the extruding tool moves downward toward the tip of the split claw, and in the upward stroke of the planting rod, the pushing tool moves toward the proximal end of the split claw. On the other hand, the OFF position of the fixed position stop clutch and the phase of each of the cams are such that the fixed position stop clutch turns OFF near the end position of the extrusion tool on the planting rod during the upward stroke. A seedling planting device for a rice transplanter characterized by being configured as follows.