JPH04330217A - Rush seedling transplanter - Google Patents

Abstract

PURPOSE:To provide a transplanter effectively utilizing the structures of conventional seedling transplanters, improved into a simple structure and used for tall rush seedlings having hard stems in comparison with rice seedlings. CONSTITUTION:In a cam mechanism 24 for driving a seedling-pushing tool 19 equipped in a planting mechanism 9, a cam surface 25a for-pushing up and guiding a cam follower 27 for the seeding-pushing operation of the seedling- pushing tool 19 is formed into a concave-curved surface, and the vibration of the seedling-pushing tool 19 caused by the inertia force of the planting mechanism 9 is canceled and prevented by a braking action caused by a force for traveling over the concave curved surface.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention includes a planting mechanism that takes out and plants rush seedlings one by one from a seedling outlet of a seedling stand, and the planting mechanism has a planting claw using a swinging crank mechanism. The device is configured to move while drawing a substantially elliptical trajectory to hold the seedlings to be planted and plant them in the field, and includes a seedling pusher that operates to push out the seedlings from the planting claw when planting the seedlings to be planted in the field. This seedling pusher also relates to a strawberry seedling transplanter configured to be driven by a cam mechanism provided at a pivot point with the crank arm of the swinging crank mechanism.

0002

[Prior Art] In a seedling transplanter having the above-mentioned structure, for example, one for planting rice seedlings grown in a mat shape, the push-up guide surface of the cam follower in the cam mechanism is conventionally formed into a smooth convex curved surface. was common (see, for example, Japanese Utility Model Application Publication No. 178821/1983).

0003

The above-mentioned conventional structure is constructed so that the attitude change operation of the seedling pusher can be performed smoothly. By the way, the strawberry seedlings for planting are taller than the above-mentioned mat seedlings, and the stems are hard and there is a high risk of them falling over if the planting depth is shallow when planting on muddy surfaces. The vertical width is larger than that of a rice seedling transplanter. Therefore, when the above-mentioned conventional configuration is used for a rice grass seedling transplanter, the planting case containing the planting claws, seedling pusher, etc. moves vertically in an elliptical trajectory, so that it is difficult to move downward. The inertial force of the planting case becomes large near the end of the area, and this causes vibrations during the planting operation on the mud surface, causing the seedlings held by the planting claws to fall off, and causing the planting operation to become difficult. The problem was that it could not be carried out smoothly. The present invention aims to eliminate the above-mentioned disadvantages through simple structural improvements.

0004

[Means for Solving the Problems] The characteristic configuration of the present invention is that in the strawberry seedling transplanter described at the beginning, in the cam mechanism, a cam surface for pushing up and guiding the cam follower for pushing out the seedling pusher is recessed. It is located at a point formed on a curved surface.

[0005]

[Operation] When the planting claw takes out the seedling from the seedling outlet and descends toward the mud surface and approaches the mud surface, the seedling pusher acts to push out the seedling to ensure that the seedling is planted.
At this time, in order to push out the seedling pusher, a cam follower linked to the seedling pusher in the cam mechanism rides on the cam surface and is guided. Since this cam surface is formed into a concave curved surface, a large force is required when the cam surface rides on the cam surface, and this acts as a braking force against the vertical movement of the case supporting the planting claws and the seedling pusher.

[0006]

[Effect of the invention] As a result, in the operating region where the amount of vertical movement of the planting claw is large and vibration is likely to occur due to inertial force, a braking action acts against the inertial force, suppressing the occurrence of vibration. This makes it possible to maintain smooth planting operations. Moreover, it can be improved by making effective use of the drive structure of the existing seedling pusher and adding simple processing.

[0007]

[Example] Hereinafter, an example will be explained based on the drawings. Figure 2
shows a rice grass seedling transplanter. This seedling transplanter is connected to the rear part of a traveling body (not shown) so as to be able to rise and fall freely, and the seedling platform is tilted backwards and is supported by a transmission case 2 that also serves as a frame so as to be able to move back and forth in a fixed stroke. 3. The seedling planting mechanism 5 takes out seedlings one by one from the seedling outlet 4 at the lower end of the seedling stand 3 and plants them in the field, and the ground float 6 slides on the mud surface. The seedling table 3 is provided with a vertical feeding device 7 of an endless rotary belt type with a protrusion, and is configured to feed the placed seedlings toward the seedling take-out port 4. Then, prior to the operation of taking out the seedlings of the seedling planting mechanism 5, the seedlings to be planted are moved from the standby position toward the tip end side in the sending direction, and the seedlings to be planted are directed toward the seedling taking out port 4. A seedling holder 10 is provided for pushing out the following seedlings and holding the succeeding seedlings in position. To explain in detail, this seedling holder 10 has a pair of front and rear swing links 11a, 11
It is pivotally connected to the transmission case 2 via b to form a four-link mechanism A, which is biased to return to the rear standby position by a spring 12, and a swing crank mechanism provided in the transmission case 2. 13, it is configured to be switched to the seedling pushing operation position and driven. The rocking crank mechanism 13
As shown in FIG. 4, there is a seedling planting mechanism 5 inside the transmission case 2.
A swing arm 16 is provided that swings around the horizontal axis X1 by an eccentric cam 15 provided on the drive shaft 14 of the swing arm 16, and the swing end of the swing arm 16 is interlocked with the base end of the swing link 11a. The connected actuation arm 17 is pushed and pulled by the rod 18.
It is configured so that the seedling holder 10 is driven to move back and forth by being pivotally connected via the .

The seedling planting mechanism 5 takes out seedlings one by one from the seedling outlet 4 and holds them on the mud surface while the planting claw 8 attached to the tip draws a nearly elliptical trajectory by a swinging crank mechanism 9. A seedling pusher 19 is provided which operates to push out the target seedlings from the planting claws 8 when planting the target seedlings in the field. To be more specific, the planting case 20 with the planting claw 8 attached thereto is pivoted to the swinging end of a swinging arm 21 that swings around the transverse axis X2 at the upper rear part, and the middle part of the swinging arm 21 is connected to the drive shaft. A pivot shaft 2 is attached to the tip of the crank arm 22 which is rotationally driven by the crank arm 14.
A swing crank mechanism 9 is configured such that the planting claws 8 move up and down while drawing a substantially elliptical trajectory when viewed from the side. The seedling pusher 19 is configured to be operated by a cam mechanism 24 provided inside the planting case 20 as the crank arm 22 rotates. That is, as shown in FIG. 1 and FIG. Axial center X
A substantially L-shaped swinging arm 2 that is swingably supported around 3.
A roller type cam follower 27 that presses against the cam member 25 is provided at one end of the swing arm 26, and the other end of the swing arm 26 is operatively connected to the seedling pusher 19 via a link mechanism 28. Therefore, the pivot shaft 23 revolves due to the drive of the crank arm 22, and the cam member 25 rotates relative to the cam follower 27 as the planting case 20 is driven. Along with the operation of the claw 8, the seedling pushing operation can be performed.

Then, as shown in FIG. 3, the cam member 25
In order to push out the seedling pusher 19, a cam surface 25a that pushes up and guides the cam follower 27 is formed into an arcuate concave curved surface. With this configuration, when the cam follower 27 rides on the cam surface 25a, the slope of the climbing becomes steep, and a large force is required to ride on the cam surface 25a. , when the planting claw 8 takes out the seedlings and descends to near the mud surface, and at this time, due to the inertia of the planting case 20, there is a force that causes the planting case 20 to descend ahead of the drive side. However, this inertial force is offset by the cam riding force, and the occurrence of unexpected vibrations of the planting case 20 can be suppressed.

Although reference numerals are written in the claims to facilitate comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

[Figure 1] Cutaway side view of the planting case

[Figure 2] Side view of the rear of the seedling transplanter

[Figure 3] Cutaway side view of the planting case

[Figure 4] Side view of the swinging crank mechanism

[Explanation of symbols]

3 Seedling stand 4 Seedling outlet 5 Planting mechanism 8 Planted nails 9 Swing crank mechanism 19 Seedling extrusion tool 22 Crank arm 24 Cam mechanism 25a Cam surface 27 Cam follower

Claims (1)

[Claims] [Claim 1] Seedling take-out port (4) of seedling stand (3)
Planting mechanism (5
), and the planting mechanism (5) includes a swinging crank mechanism (
9), the planting claw (8) is moved in a nearly elliptical trajectory to hold the target seedling and plant it in the field, and when planting the target seedling in the field, the seedling is planted. Seedling pusher (19) that operates by pushing out from the claw (8)
The seedling pusher (19) also includes a crank arm (22) in the swinging crank mechanism (9).
), the strawberry seedling transplanter is configured to be driven by a cam mechanism (24) provided at a pivot point between A strawberry seedling transplanter in which a cam surface (25a) for pushing up and guiding a cam follower (27) is formed into a concave curved surface.