JPH025701Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a seedling planting device for a rice transplanter that is configured to move up and down so as to separate seedlings on a seedling stand and plant the separated seedlings on the mud surface below.

In recent years, seedling planting devices of rice transplanters have been using constant motion to draw the optimal planting trajectory for the purpose of ensuring good rooting and growth after planting and improving planting accuracy. The idea is to configure the planting claw to be able to swing relative to the planting action body that repeats this process, and to swing the planting claw at a predetermined timing by the operation of a drive mechanism to draw a desired movement trajectory. It is being

The purpose of the present invention is to provide a seedling planting device for such a rice transplanter that can perform reliable planting and has good durability, as well as a seedling planting device with a simple transmission structure. do.

In order to achieve the above object, the present invention has the following configuration.

That is, in a seedling planting device of a rice transplanter configured to move up and down so as to divide the seedlings on the seedling stand and plant the separated seedlings on the mud surface below, [a] the seedling planting device is fixed It is composed of a combination of a planting actuator attached to a frame and a planting case supported so as to be swingable relative to the planting actuator around a horizontal axis.

[B] A planting claw for separating seedlings and a seedling pusher for pushing out the separated seedlings held by the planting claw toward the tip of the claw are attached to the planting case.

[C] The planting actuator is provided on the fixed machine frame so as to circulate the supported planting case between an upper position near the seedling stand and a lower position near the mud surface. It is configured to be able to freely operate within a plane along a vertical plane by a drive device.

[d] The planting case is configured to be swingable relative to the planting actuator around the horizontal axis by a drive mechanism attached to the planting actuator, and the planting case A pusher actuating device that moves the seedling pusher relative to the planting claw along the nail blade direction via an operating body that is pivoted to and swings and rotates in accordance with the relative rocking. It's decorated.

[E] An axis of a swing operation shaft of a drive mechanism for applying a swing operation force about the horizontal axis to the planting case, and an axis of a drive shaft that swings and drives the operating body of the extrusion tool. The core is set on the same axis.

It is characterized by having the configurations described in [A] to [E] above.

With the above configuration, the desired movement locus of the planting claw can be drawn by combining both the movement of the planting actuating body and the relative rocking of the planting case with respect to the movement, thereby increasing the degree of freedom in design conditions. Therefore, for example, it is easy to set the posture of the claws when separating the seedlings, the trajectory of the claws when entering the ground, etc. as desired, and a good planting operation can be performed. In addition, the drive device for the seedling pusher that moves up and down relative to the planting claw is housed inside the planting case, ensuring reliable operation even in muddy conditions and ensuring that the seedling pusher remains stable even during long-term use. The operating timing is less likely to be out of order and durability can be improved.

Furthermore, since the axis of the swinging operation shaft that swings and drives the planting case and the axis of the drive shaft that swings and drives the operating body of the extruder actuator are set on the same axis, Compared to the case where the operating member for swinging the planting case and the operating member for operating the extrusion tool are provided in separate positions, the transmission structure for operating each is coaxially arranged. It is easy to configure because it is compact and has a simple structure.

In addition, by organizing the transmission structures on a coaxial core, it is advantageous in that the number of seals in the planting case can be reduced, and there is an advantage that the seal structure can be simplified.

Next, embodiments of the present invention will be described based on the drawings.

As shown in Fig. 1, it is a self-propelled aircraft that is equipped with an engine 1 at the front, a control handle 2 at the rear, and left and right running wheels 3 between them that can be raised and lowered. At the rear, seedling planting device 4,
A slanted seedling platform 5 on which the pine-shaped seedlings to be supplied to the seedling planting device 4 are placed is provided in a state where the seedling planting device 4 is located in front of the seedling platform 5, and
Below the self-propelled aircraft, front and rear grounding floats 6,
7 is provided to constitute a walking rice transplanter.

The seedling planting device 4 is constructed as follows.

That is, as shown in FIGS. 2 to 5,
The middle part of the proximal side planting actuator 8 is connected to a rotatable crank arm 10 for driving the fixed machine frame 9 that constitutes the machine body.
is pivotally connected to the free end thereof by a support shaft 11 fixed thereto, and one end of the proximal side planting actuating body 8 is pivotally connected to the free end of the swing arm 12 of the fixed machine frame 9,
The proximal side planting actuator 8 is attached to the machine body so as to be driven to rotate up and down, and a distal side planting case 13 is attached to the free end 8a of the proximal side planting actuator 8.
is attached by a connecting shaft 14 so as to be swingable around a horizontal axis substantially parallel to the rotational axis of the proximal side planting actuator 8,
A seedling planting claw 15 is fixed to the free end side of the tip side planting case 13, and the other end side of a pushing rod 17 having a seedling pushing tool 16 provided at one end side is slidably attached. .

A cam 18 is rotatably installed inside the proximal side planting actuating body 8, and the protruding portion of the support shaft 11 into the proximal side planting actuating body 8 is connected to the rotating cam 18 to rotate. The cam 18 is configured to be driven in conjunction with the rotation of the proximal side planting actuator 8. A first link 20 provided with a roller 19 for contacting the rotating cam 18 is attached to a support shaft 21 fixed thereto.
At the same time, the second link 22 is swingably attached to the proximal side planting actuating body 8, and the second link 22 is integrally extended from the protrusion of the support shaft 21 to the outside of the proximal side planting actuating body 8. Then, the third link 23 is swingably attached to the distal end side planting case 13 by a support shaft 24 fixed thereto, and by this support shaft 24, the planting case 13 is aligned with the axis of the connection shaft 14. It constitutes a swing operation shaft that provides a swing operation force for swinging around the horizontal axis. Further, the free end sides of the second and third links 22 and 23 are connected to the connecting shaft 2.
Further, the roller 19 is urged into contact with the rotating cam 18, and the seedling planting claw 15 is connected to the proximal end of the distal side planting case 13 with respect to the proximal side planting actuating body 8. A spring 27 for biasing toward the side planting case 8 is applied to the arm portion 20a of the first link 20, and
A swing link mechanism A for interlocking the distal side planting case 13 and the rotary cam 18 so that the distal side planting case 13 is reciprocated as the base side planting actuator 8 rotates. has been configured. In other words, the roller 19
is gradually displaced inward of the rotating cam 18, the distal side planting case 13 swings in the direction of extension with respect to the proximal side planting actuating body 8, and the proximal side planting actuating body 8 rises. During the period from the start of operation until reaching the upper limit, the roller 19 is displaced to the outside of the rotating cam 18, and the distal side planting case 13 returns to its original bent state with respect to the proximal side planting actuating body 8. It is designed to swing to restore its original state.

In short, the distal side planting case 13 is reciprocated within a certain range by the spring 27 and the cam 18 in conjunction with the vertical swing of the base end side planting actuator 8, and the planting claw 15 is moved just before its lowering limit. After that, the machine is swung backward in the direction of movement, and then swung back as it rises. When the machine is stopped, the tip of the seedling planting claw 15 follows a figure-eight trajectory as shown in Fig. 2. P is drawn, and as a result, the trajectory of the claw tip relative to the ground as the planting advances is as shown by P' in Figure 2.
There is almost no forward movement component relative to the aircraft,
Rather, it will have a backward movement component, that is, even if the forward movement component due to the forward movement of the aircraft is added, it will enter the ground in a nearly vertical state, and the hole scraped by the planting claw 15 will be planted. Care has been taken to ensure that no large amount remains behind the seedlings. Furthermore, the interlocking mechanism between the rotating cam 18 and the distal end side planting case 13 is connected to the first to third swing links 20 and 2.
By configuring only 2 and 23, the rotating cam 1
Care has been taken to ensure smooth transmission of power from 8 to the distal end side planting case 13.

Further, a fourth link 28 consisting of an arm extending integrally and swingably from the third link support shaft 24
However, as the planting case 13 swings, the pushing tool 16
This fourth link 28 and one end side are pivotally connected to the free end side of the fourth link 28, and the other end side is pivotally connected to the free end side of the fourth link 28. A fifth link 29 pivotally connected to the insertion end of the extrusion rod 17 into the distal side planting case 13 interlocks and connects the third link 23 and the seedling extrusion rod 17. A drive mechanism is configured to operate the extrusion rod so that the seedling extrusion tool 16 is switched between an operative position and a non-operative position as the attached operating body 8 rotates.

That is, when the tip-side planting case 13 is swung in order to swing the planting claw 15 backward, the bending link mechanism consisting of the fourth and fifth links 28 and 29 is operated in the extension direction, As a result, the extrusion rod 17 operates to protrude and extrude the seedlings supported at the tips of the claws, and the third link 23 is oscillated in synchronization with the rise of the proximal side planting actuator 8. The movement causes the bending link mechanism to be actuated in the bending direction, thereby causing the extrusion rod 1 to move.
7 is retracted so that the seedling pusher 16 is returned to its non-operating position.

In short, the first to third links 2 for transmitting power from the rotating cam 18 to the tip side planting case 13
0, 22, and 23 as transmission members to the extrusion rod 17, and the transmission from the third link 23 to the extrusion rod 17 is transmitted by the fourth and fifth swing links 2.
8 and 29, the rotating cam 1
The power transmission from 8 to the seedling pusher 16 is designed to be carried out smoothly even with a simple structure.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

The drawings show an embodiment of the seedling planting device of the rice transplanter according to the present invention, and FIG. 1 is a side view of the walking rice transplanter, and FIG.
The figure is a side view of the seedling planting section, Figure 3 is a sectional view of the distal side planting case, Figure 4 is a sectional view of the proximal side planting actuator, and Figure 5 is a plan view of the seedling planting device. be. 8... Planting operating body, 9... Fixed machine frame, 13...
Planting case, 15... Planting claw, 16... Seedling extrusion tool, 17... Extrusion rod, 24... Rocking operation shaft,
28... Operating body.

Claims (1)

[Scope of Claim for Utility Model Registration] In a seedling planting device of a rice transplanter configured to move up and down so as to separate seedlings on a seedling stand and plant the separated seedlings on the mud surface below, [A] the seedling planting device; The attachment device is composed of a combination of a planting actuator 8 mounted on a fixed machine frame 9 and a planting case 13 supported so as to be swingable relative to the planting actuator 8 around a horizontal axis. It has been done. [B] Planting claw 15 for separating seedlings and the planting claw 15
The planting case 13 is equipped with a seedling pusher 16 for pushing out the separated seedlings held in the container toward the tip of the nail. [C] The planting actuator 8 is attached to the fixing machine frame 9 so as to circulate the supported planting case 13 between an upper position near the seedling stand and a lower position near the mud surface. It is configured to be able to operate freely within a plane along a vertical plane by a provided drive device. [D] The planting case 13 is the planting actuator 8
It is configured to be able to freely swing relative to the planting actuator 8 around the horizontal axis by a drive mechanism attached to the planting case 13, and is pivotally supported by the planting case 13, and The seedling pusher 16 is pushed out via the operating body 28 which swings and rotates accordingly.
An extruder actuating device is installed therein to move the implanted nail 15 relative to the planting nail 15 along the nail blade direction. [E] The axis of the swing operation shaft 24 of the drive mechanism for applying a swing operation force around the horizontal axis to the planting case 13 and the operating body 28 of the extrusion tool 16 are driven to swing. The axis of the drive shaft is set on the same axis. A seedling planting device for a rice transplanter, characterized by having the configuration described in [A] to [E] above.