JP2508300Y2 - Rotary planting equipment for rice transplanters - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a seedling planting device of a rice transplanter for taking out one seedling of each seedling from a seedling mat on a seedling mounting table and planting it in a field scene. .

(Prior Art) Conventionally, in the technical field as described above, there was one provided with a so-called rotary planting claw, but there was a problem that front and rear transplant cases interfere with each other. Prior arts thereof include JP-A-61-162111, JP-A-61-146108, and JP-A-61-146108.
There is No. 62-3706.

Japanese Unexamined Patent Publication No. 61-162111 is configured such that the upper surface of a transplant case, which has a cam mechanism for releasing seedlings, is low on the side where the seedling transplanter is attached and becomes higher toward the front.

Both JP-A-61-146108 and JP-A-62-3706 are so-called offset type in which a seedling discharger is provided outside the cam shaft surface. One embodiment using a forced pushing claw drives a push rod from a push arm that contacts a cam via an intermediate shaft and a relay metal fitting, and the push arm is biased by a spring.

In addition, Japanese Patent Laid-Open No. 62-3706 also uses a forced pushing claw of a planting claw, but when the planting claw plunges into the surface soil surface, the pushing fork rapidly moves downward with the cam mechanism and the planting claw moves upward. When it starts moving, the push-out fork is pulled up by the spring. The spring is biased to push the pushing fork upward.

(Problems to be solved by the invention) However, in Japanese Patent Laid-Open No. 61-162111, the cam, the interlocking rod of the cam, the seedling emitter and the seedling-attaching nail and the movement locus surface of the tip of the seedling-attaching nail are on the same plane. Since it is on the upper side and is not a so-called offset type, the problem of interference between the front and rear transplant cases could not be solved sufficiently, and the planting holes became large, which caused floating seedlings.

Further, in Japanese Unexamined Patent Publication (Kokai) No. 62-3706, since the forced pushing of the planting claw is performed by the cam mechanism, the pushing speed is not sufficient and reliable planting cannot be performed.

Further, in JP-A-61-146108, the forced pushing of the planting claw is performed by a spring, but the axial surface of the push rod is outside the axial surface of the push arm biased by the spring.
Since the pushing force of the spring is indirectly transmitted to the push rod via the intermediate shaft and the relay metal fitting, the mechanism is complicated, the force transmission is not smooth, and there are many failures.

(Means for Solving the Problem) Therefore, the technical problem of the present invention is that the seedlings of the rice transplanter can be reliably planted in the rotary type planting claw which uses the spring for the forced extrusion of the planting claw. An object of the present invention is to provide a planting device, and a technical means of the present invention for solving this technical problem is to fix a rotary case in which a planetary gear mechanism using an eccentric gear is mounted on a rotating shaft to which electric power is transmitted from a power source. However, the rotary case is provided with a cam shaft at a position distant from the rotary shaft to which it is attached by an appropriate distance in the radial direction and at equal positions in the circumferential direction of rotation of the rotary case. A cam in which a planting claw case supporting member adapted to rotate once in the direction opposite to the rotating direction of the rotary case is externally fitted, and the planting claw case supporting member is provided with the planting claw case. Set on the shaft The push lever that comes into contact with the beam cam is in a direction of a plane including the cam shaft and the pivot pin of the push lever, has a curved outward shape in a direction away from the rotary case, and has a push rod at its end, A spring for pushing out the push rod is provided on the extension of the axis of the push rod via a connecting member that connects the push lever and the push rod,
The center line of the spring is as close to the planting claw side as possible from the center line of the push rod.

Then, push the central axis of the spring (23) into the push rod (25).
The case surface of the planting claw case (11) below the spring (23) can be provided closer to the planting claw (26) side by moving it closer to the planting claw (26) side than possible. And the closed loop curve of the planting nail becomes longer.

Further, the push lever (19) and the push rod (25) are connected by a connecting member (21), a spring receiver (22) is extended to the rear end of the connecting member (21), and a spring is attached to the spring receiver (22). By contacting (23), more reliable planting can be performed using the spring (23).

(Operation) The driving force transmitted to the transmission case (9) is applied to the input shaft (1
It is transmitted from 2) to the rotary case (10), and the rotary case (10) rotates.

On the other hand, since the sun gear (13) is loosely fitted to the input shaft (12) and the sun gear (13) is fixed to the transmission case (9) side, the intermediate gear (14) is the sun gear (14). By rotating around the outer circumference of 13), it rotates in the same direction as the rotary case (10), the rotational force is transmitted to the planetary gear (17), and the planetary gear (17) rotates in the opposite direction to the rotary case (10). To do. The rotational force of the planetary gear (17) is transmitted to the planted pawl case support member (29). The rotational force of the planting claw case supporting member (29) is transmitted to the planting claw case (11), and the planting claw case (11) rotates.

Since the sun gear (13), the intermediate gear (14), and the planetary gear (17) are appropriately decentered from the center of rotation, the rotation of the planted pawl case (11) is faster than that of the rotary case (10). It gets slower and slower. Specifically, when the planting claw case (11) descends so as to approach the field scene, it slowly rotates in the direction opposite to the rotation direction of the rotary case (10), so its posture is the same as that of the rotary case (10). The balance slowly changes downwards, and when it rises after being planted, it quickly rotates in the opposite direction to the rotation direction of the rotary case (10), so its posture is changed upwards.

By the way, the cam (18) of the cam shaft (16) is rotated by the rotation of the planted claw case (11) by the planted claw case support member (29).
The push lever (19) is operated via. That is,
Immediately after the planting claw (26) has dug down the field scene, the push lever (19) has a spring (23A) at the end (19A) of the push lever (19) due to the step (18A) of the cam (18). ) Of the spring (2
Due to the forward biasing force of 3), the push lever (19) is moved to the spring (23) via the spring receiver (22) and the connecting member (21).
The push rod (25) is pushed together with the pushing rod (25).

Then, the peripheral edge portion (18B) of the cam (18) causes the push lever (19) to slowly rotate in the direction opposite to the direction in which the spring (23) is urged, and the push rod (25) also moves to the spring (23). It is pulled back in the direction opposite to the direction in which it is urged to move to the step of taking out seedlings from the next seedling mat.

(Embodiment) First, the entire riding rice transplanter will be described. In FIG. 4, (1) is a riding rice transplanter, (2) is steering,
(3) engine, (4) planting part, (5) top link, (6) lower link, (7) seedling stand, (8) float, (9) transmission case, ( 10) is a rotary case, and (11) is a planted nail case.

To describe the seedling planting device of the rice transplanter described above more specifically, the input shaft (12) is rotatable with respect to the transmission case (9). A sun gear (13) is loosely fitted to the input shaft (12). An intermediate gear (14) (14) that meshes with the sun gear (13) and has the same number of teeth as the sun gear (13) rotates in the rotary case (10) as a rotating body via the intermediate shaft (15). Cam shaft (16) that is freely installed and functions as a planting shaft
The planetary gears (17) and (17) having the same number of teeth as the sun gear (13) with which the intermediate gears (14) and (14) constantly mesh are fitted on the upper side.

The sun gear (13), the intermediate gears (14) (14), and the planetary gears (17) (17) are gears that are appropriately eccentric from the center of rotation. Also, there are two intermediate gears and planetary gears,
This is because the planet gears are provided with pins, springs, etc. to prevent backlash of the planet gears.

A cam (18) is provided on the cam shaft (16), and the cam (18) has a cam shaft (16) as shown in FIG.
A push lever (19) curved outward in a direction away from the rotary case (10) is in contact with the plane including the shaft support pin (20) of the push lever (19). Further, the rotational force of the planted claw case support member (29) is transmitted to the planted claw case (11).

The push lever (19) is pivotally supported by the pin (20). A plate (19B) extends in the middle of the push lever (19), and a cushion rubber (24) is fixed to the plate (19B). When the push lever (19) is rotated forward by the action of the spring (23) and the cam (18), the cushion rubber (24) comes into contact with the inner surface of the front part of the planting claw case (11) and serves as a stopper. Plays.

The tip of the push lever (19) is connected to the rear hole (21A) of the connecting member (21) by a pin.

A spring receiver (22) extends from the rear end of the connecting member (21), and a spring (23) is in contact with the spring receiver (22).
The rear end of the spring (23) is in contact with the inner surface of the planted claw case (11). The spring (23) is biased so as to push the spring receiver (22) forward. And, in order to bring the center line of the spring (23) closer to the planting pawl shaft (26) than the center line of the push rod (25) as much as possible, a connection that connects the push lever (19) and the push rod (25). A member (21) is provided. If the spring (23) is on the center line of the push rod (25), it will hit the closed loop curve drawn by the rear planting claw or the front planting claw, so the center line of the spring is more than the center line of the push rod. The push lever is moved to the side of the planting claw as much as possible, and the push lever is moved in the direction of a plane including the cam shaft (16) and the shaft support pin (20) of the push lever (19) for this shift. The curved outward shape is formed in a direction away from the rotary case (10). With such a configuration, the closed loop curve of the planting nail becomes even longer. (The dotted line in FIG. 3 is a conventional example, and the solid line is an embodiment of the present invention.) On the other hand, the front hole (21B) of the connecting member (21) is connected to the push rod (25) by a pin. The push rod (25) is pushed forward when the push lever (19) is rotated forward by the action of the spring (23) and the cam (18) and the connecting member (21) is driven. By pushing the push rod (25), the seedling taken out by the planting claw (26) is planted in a field scene. (26) is a planting nail, and each seedling is taken out from the seedling mat on the seedling mounting table.

(Effect) In the present invention, the forced pushing of the planting claw is performed by the spring, and since the spring is extended and extended on the extension of the push rod axis, the pushing force of the spring is directly transmitted to the push rod, so the mechanism is It became easier, and the power transmission was smoother, and there were fewer troubles such as twisting.

In this rotary planting device, the center line of the spring (23) is pushed as much as possible from the center line of the push rod (25).
Since it is moved closer to the side, the case surface of the planting claw case below the spring (23) can be provided closer to the planting claw side, and the push lever is made to be a plane including the cam shaft and the push pin shaft support pin. Despite the fact that it has a curved outward shape away from the rotary case, it can prevent interference between the planting claw cases, and since the closed loop curve of the planting claws is longer than before, it can be planted. The nails can be made smaller, and floating seedlings can be prevented.

 And more reliable planting can be done using springs.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a rotary case and a planting claw case showing an embodiment of the present invention. FIG. 2 is a transverse sectional view of FIG. 1. FIG. 3 is a planting related to a rotary planting device. Explanatory drawing showing a closed loop curve of a nail, (dotted line is a conventional example, solid line is an embodiment of the present invention) FIG. 4 is a front view of a riding rice transplanter. 10 …… Rotary case, 11 …… Planted claw case 16 …… Cam shaft, 18 …… Cam 19 …… Push lever, 21 …… Coupling member 22 …… Spring holder, 23 …… Spring 25 …… Push rod, 27 …… Bolt

Claims (1)

(57) [Scope of utility model registration request] 1. A rotary case in which a planetary gear mechanism utilizing an eccentric gear is installed is fixed to a rotary shaft to which power is transmitted from a power source, and the rotary case is mounted at a proper distance in a radial direction from a rotary shaft to which the rotary case is attached. A cam shaft is provided at a distant position and at equal positions in the circumferential direction of rotation of the rotary case, and the cam shaft is configured to rotate once in the direction opposite to the rotating direction during one rotation of the rotary case. In a case where a planted claw case support member is fitted on the outside and the planted claw case support member is provided with a planted claw case, the push lever that comes into contact with the cam provided on the cam shaft is the cam shaft and the shaft of the push lever. A push rod is provided at the end of the push rod as a curved outward shape in the direction of the plane including the support pin and away from the rotary case, and the push lever and push lever are extended on the axis of the push rod. A spring for pushing out a push rod is provided through a connecting member that couples with the shrod, and the center line of the spring is moved closer to the planting claw side than the center line of the push rod as much as possible. Rotary planting device.