JPS6031451Y2 - Seedling planting device - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a seedling planting device for a rice transplanter.

This seedling planting device allows the seedlings taken out from the seedling stand to be accurately pushed out from the claws using the pushing tool, so it is possible to perform seedling planting work with a stable planting posture. ing.

In addition, when configuring this seedling planting device, the overall structure can be made more compact by arranging the seedling stand and the planting arm in close proximity. If they are located away from the mud surface, it is possible to reduce muddy water splashing and adhering to them.

For this reason, the planting claw and the seedling pusher are attached to the planting arm so as to be retractable, and once the planting claw and the seedling pusher are moved downward in the vicinity of the planting location, next,
It has been considered that only the extrusion tool is allowed to protrude and migrate.

The present invention makes the overall structure more compact, prevents muddy water from splashing onto the seedling stand, and improves the overall structure by moving both the planting claw and the seedling pusher out and then moving only the seedling pusher out. A device that achieves various effects such as stabilizing the planting posture, and also enables more stable planting work by rationally improving the protruding movement form of the planting claw and seedling pusher. The seedling planting device according to the present invention is a seedling planting device in which a planting claw and a seedling pusher are attached to a planting arm so as to be movable in the planting direction. , a stop mechanism is provided for shockingly stopping the protruding movement of the planting claw with respect to the planting arm, and the planting claw and the seedling pusher are moved against the planting arm that moves downward near the planting location. After both are moved downwardly at the same speed, only the protruding movement of the planting claw is stopped by the stop mechanism, and only the seedling pusher is moved at the same speed as the planting claw and the seedling pusher. The invention is characterized in that it is provided with a drive mechanism that causes the protrusion to move further downward at a higher protrusion speed than the protrusion speed at which the protrusion moves.

In other words, the seedlings are pushed out near the planting site by a three-part system consisting of a planting arm that moves downward, and a planting claw and a seedling pusher that both project at the same speed relative to the planting arm. The seedlings are quickly plunged into the mud surface in the correct posture without dropping them, and then the planting claws are impulsively stopped against the arm by the stop mechanism, thereby separating the seedlings and the planting claws. In addition to ensuring the separation, the seedlings, which tend to slide away due to the acceleration of the extruder, are pressed against the mud, so that the planting posture is further stabilized, and a good planting operation can be performed.

Embodiments of the present invention will be described in detail below with reference to illustrative drawings.

The figure shows the engine 3, the rear seedling planting device, and the vicinity of this seedling planting device in cooperation with a float 1 that slides on the field and a pair of left and right running wheels 2, 2 that run while touching the hard surface. The figure shows a walk-behind rice transplanter that runs while supporting a body consisting of a control handle 4 and the like extending rearward and upward from the machine, and is configured to plant seedlings using the planting device as described below.

That is, the seedling tray 5, which is tilted backwards and whose upper end side is deviated rearward compared to the lower end side, is moved horizontally and reciprocally with a constant stroke, and the machine advances further than the seedling tray 5. A hollow planting arm 6 is installed at the front edge of the direction.
is in place.

This planting arm 6 has an intermediate portion pivotally connected to a support shaft 8 fixed to the tip of a crank arm 7 which is driven and rotated around a horizontal axis, and a rear end thereof rotates around a horizontal axis. It is pivotally connected to the tip of a swinging arm 9 which is pivotably supported, so that it can be circulated up and down as the crank arm 7 rotates.

The planting arm 6 also has a planting claw 10 and a seedling pusher 1.
1 is installed.

These planting claws 10 and seedling pusher 11 are connected to the planting arm 6
It is supported so that it can move in and out along the direction of the nail blade,
The ejection/retraction drive mechanism will be explained below.

That is, the planting claw 10 is urged to protrude by a spring 12, and the seedling pusher 11 is urged in the projecting direction by a spring 13 having a stronger urging force than the spring 12.

One end of a swing link 14 whose intermediate portion is pivotally supported by the planting arm 6 is pivotally connected to the base end of the seedling pusher 11 .

This swing link 14 is configured to come into contact with a cam 16 fixed to the support shaft 8 via a roller 15 pivotally supported on the other end side.

As will be described later, this cam 16 has a first arc-shaped first part that restricts the pushing tool 11 to a position in which it is retracted into the planting arm 6 against the urging force until the planting claw 10 reaches near the mud surface. Cam surface S
1. A gently inclined second cam surface S2 for gradually protruding the extrusion tool 11 downward when the planting claw 10 reaches near the mud surface, and the planting claw 10 reaches near the bottom dead center. At this point, a steeply inclined third cam surface S3 for rapidly protruding the seedling pushing tool 11 downward and a fourth cam surface S4 for moving the seedling pushing tool 11 backward again against the urging force are formed. has been done.

In addition, the part of the seedling pusher 11 that is always located within the planting arm 6 receives the abutted part 17b formed on the planting claw 10, and prevents the planting claw 10 from moving in a biased manner. In addition, the planting claw 10 is provided with an abutment part 17a for making contact with a contact part 18b provided on the planting arm 6.
A contact portion 18a is formed to restrict the protrusion limit of the planting claw 10 to an amount smaller than the amount of extrusion movement of the seedling pusher 11, and a stop mechanism is formed by the abutted portion 18b and the abutment portion 18a. It consists of

The operation of the seedling planting device with the above configuration will be explained.

That is, the planting claw 10 is cyclically rotated up and down between the seedling take-out location and the planting location at the lower end of the seedling stand as the planting arm 6 circulates, and the seedling pushing tool 11 The nails also move together with the planted nails 10.

On the other hand, in areas other than the portion where the planting claw 10 is located near the planting location, the seedling pusher 11 is held in a retreated position within the planting arm 6 by the action of the first cam surface S of the cam 16. , Accordingly, the planting claw 10 is attached to the contact portion 17.
Due to the abutting action between a and the abutted portion 17b, the seedling pushing tool 11
It is held in a slightly larger and protruding position.

Then, when the seedling pusher 11 reaches near the planting location,
When the second cam surface S2 gradually protrudes and moves,
At the same time, the planting claw 10 follows the movement of the abutting part 17a and protrudes downward until the abutting part 18a and the abutted part 18b come into contact with each other and stopping shockingly. death,
Subsequently, when the planting nail 10 reaches near the bottom dead center, the third
Due to the action of the cam surface S3, only the seedling pushing tool 11 suddenly moves to a position corresponding to the tip of the claw, and then the fourth cam surface S.

By this action, the seedling pusher 11 and the planting claw 10 are moved back to the retreating position.

Therefore, with the operation of the planting arm 6, the planting claw 10 sequentially takes out the block seedlings W corresponding to the number of plants along the lower end row of the mat-like seedlings placed on the seedling stand 5, and connects them to the tip of the claw. The block seedling W is carried downward while being supported by the cooperative support action with the true tip of the seedling extruder, and once the planting claw 10 and the seedling extruder 11
After gently protruding and moving the seedling pushing tool 11 downward, the seedling pushing tool 11 is quickly moved downward, and then the seedling pushing tool 11
The block seedlings W are quickly moved downward to push out and detach from the claws 10, and the block seedlings W are planted in the mud.

[Brief explanation of the drawing]

The drawings show an embodiment of the seedling planting device according to the present invention, with FIG. 1 being a side view of a walking rice transplanter, FIG. 2 being a partially vertical schematic side view of the seedling planting device, and FIG. FIG. 5... Seedling stand, 6... Planting arm,
1o...Curved planting claw, 11...Seedling pusher.

Claims (1)

[Scope of utility model registration request] A seedling planting device in which a planting claw 10 and a seedling pusher 11 are attached to a planting arm 6 so as to be freely retractable in the planting direction, the planting claw being attached to the planting arm 6. 10 is provided, and the planting claw 10 and the seedling pusher 11 are both moved downward at the same speed with respect to the planting arm 6 that moves downward near the planting location. After the protruding movement, only the protruding movement of the planting claw 10 is stopped by the stop mechanism, and only the seedling pushing tool 11 is caused to project at the same speed. A seedling planting device characterized by being provided with a drive mechanism that causes the seedlings to protrude and move further downward at a protrusion speed that is greater than the speed at which the seedlings are planted.