JPS6031454Y2 - Seedling planting device - Google Patents

Description

[Detailed description of the invention] The present invention is constructed so that when planting seedlings, the block seedlings held by the planting nails are pushed out into the mud by relatively moving the planting nails and the seedling pusher. With the powerful seedling planting device,
In particular, of the first rod for supporting the planting claw and the second rod for supporting the seedling pusher, which are attached to the planting arm so that they can move in and out while being parallel or almost parallel to each other, the second rod is forced to move in and out. These two rods are connected to each other from the rod axial direction in order to move the first rod to follow it until the first rod is forced to protrude by a certain amount. The present invention relates to a seedling planting device which is provided with a contacting piece.

Since this type of seedling planting device retires both rondos to the planting arm side when taking out the seedlings, it is possible to make the overall structure more compact by bringing the planting arm and the seedling storage section closer together. When planting seedlings, by moving the planting claw and the seedling pushing tool protrudingly, it is possible to provide the seedling accommodating section only at the protruding moving bone in the upper part where muddy water is difficult to scatter. Since movement in and out of the extrusion tool is performed by forced movement in and out of only the second rod, there are various advantages such as simplification and cost reduction of the entire drive structure.

On the other hand, since the planting claws and the seedling pusher are attached to the planting arm through rods so that they can move in and out, both ronds may unexpectedly rotate around the axis of the rod during the protrusion movement. As a result, when planting seedlings, there is an inconvenience that sometimes the desired seedling extrusion function cannot be fully demonstrated.

The present invention solves the above-mentioned disadvantages by improving the structure of the contact pieces fixed to each of the rods in a very simple manner, and without impairing the above-mentioned advantages, it is possible to always ensure reliable and good seedling planting over a long period of time. We should do the best we can.

In the seedling planting device of the present invention, among the contact pieces provided on the first rod and the second rod, one of the contact pieces has a virtual plane connecting the axes of the first rod and the second rod. A protrusion having substantially parallel side portions is provided, and the other contact piece is provided with an elongated hole into which the protrusion is inserted, and the protrusion is engaged with the elongated hole to allow rotation of both ronds about the rod axis. It is characterized in that it is configured to prevent.

That is, the protrusion provided on the contact piece on the first rod side and the elongated hole provided on the contact piece on the second rod side are fitted in a state that allows a certain amount of relative movement in the rod axis direction. , it is possible to reliably prevent unexpected rotation of both rods around the rod axes during the protrusion movement, and moreover, it is possible to reliably prevent the unexpected rotation of both rods around the rod axes during the protrusion movement. Since it is a contact, for example, compared to a single point contact made by abutting one surface perpendicular to the imaginary plane connecting the axes of both rods, the amount of force applied to the abutment point when the rod rotates around the axis is Since the force is distributed, there is less wear on the corner of the contact piece, and the desired action can be maintained well over a long period of time.

Therefore, by making an extremely simple and inexpensive structural improvement by simply providing protrusions and long holes in the abutment pieces fixed to both rods, it is possible to consistently and reliably plant seedlings without sacrificing the above-mentioned advantages. It has now been possible to perform it well over a long period of time.

An embodiment of the sewage system will be described based on the drawings.

Fig. 1 shows a traveling type rice transplanter, in which a seedling stand 10 that can be reciprocated in left and right directions is attached to the rear end of a frame 9 that also serves as a transmission case and extends rearward from a transmission case 8 that is directly connected to an engine 7. , a seedling planting link mechanism 13 that circulates the planting claw 11 and the seedling pusher 12 that pushes out the removed seedlings held by this onto the mud surface, a planting mission 14 that controls these drives, etc. The attachment device 15 is provided in series, and a pair of left and right running wheels 17, 17 that can be raised and lowered are arranged on both sides of the ground leveling float 16.

The seedling planting link mechanism 13 is constructed as shown in FIG. 2.

That is, the middle part of the planting arm 1 is equipped with a first rod 2 that supports the planting claw 1 and a second rod 3 that supports the seedling pusher 12 so as to be movable in parallel or substantially parallel positions with each other. , is pivotally connected to a crank arm 18 that is driven and rotated in one direction by the planting mission 14, and the rear end of the planting arm 1 is pivotally connected to the planting mission 14 so as to be swingable. The planting claw 11 and the seedling pusher 12 are pivotally connected to the crank arm 1.
8 and the swinging motion of the swinging arm 19, the swinging arm 19 is configured to perform a circular movement in the vertical direction.

Then, of the first rod 2 for supporting a planting claw and the second rod 3 for supporting a seedling pusher attached to the planting arm 1, the second rod 3 is interlocked and connected to the forced egress/retreat mechanism 4,
The ends of these rods 2 and 3 located inside the planting arm 1 are brought into contact with each other from the rod axis direction in order to cause the first rod to follow and move until the second rod 3 is forcibly protruded by a certain amount. Pieces 5 and 6 are provided, and among these circumferential contact pieces 5 and 6,
A spring 20 that elastically biases the first rod 2 in the projecting direction is interposed between the abutment piece 5 on the first rod 2 side and the inner wall portion of the planting arm 1 opposite thereto. The contact pieces 5 and 6 have a protrusion 5A and an elongated hole 6A that fit together to allow a certain amount of relative movement in the rod axis direction and prevent the rods 2 and 3 from rotating around the rod axis. and.

The forced evacuation mechanism 4 includes a cam 4A fixed to the spindle 18A on the crank arm 18 side, a swing link 4B engaged and connected to the contact piece 6 of the second rod 3, and the swing link 4B. a spring 4 that elastically biases the roller 4b pivoted at the other end in a direction to contact the outer circumferential surface of the cam 4A;
It is composed of C.

In addition, the cam 4A has a first cam surface S that restricts the extruder 12 to a retracted position within the planting arm 1 against the biasing force of the spring 4C until the planting claw 11 reaches near the mud surface. □ and a second cam surface S for gradually protruding and moving the pushing tool 12 downward when the planting claw 11 reaches near the mud surface.
2, and a third cam surface S3 for rapidly protruding and moving the seedling pushing tool 12 downward when the planting claw 11 reaches near the bottom dead center, and a third cam surface S3 for moving the seedling pushing tool 12 again against the urging force. A fourth cam surface S for retiring movement is formed.

In addition, 21 and 22 in the figure are the contact pieces 5 of both the rods 2 and 3.
, 6 is an elastic buffer member provided on the inner wall portion of the planting arm 1 that comes into contact with the planting arm 1.

When such elastic buffer members 21 and 22 are provided,
There is an advantage that the noise generated when the planting claw 11 and the seedling pusher 12 protrude and move can be eliminated, and that the rotation of both the rods 2 and 3 can be prevented.

Further, FIGS. 4 and 5 show a mechanism 23 for reciprocating the seedling stand 10, which is used for the planting mission 1.
Of the seedling rack feeding shaft 24 and the spiral rotation shaft 25 supported by the seedling rack 4, a bridge support member 26 which is slidably fitted onto the helical rotation shaft 25 is fitted on the middle part of the seedling rack feeding shaft 24. The helical rotating shaft 2 is installed in the internal space of this piece receiving member 26.
A piece 27 that laterally moves the seedling stand 10 by relative rotation with the piece 5, and a spring 28 that urges the piece 27 in a direction to fit into the spiral groove 25A of the spiral rotation shaft 25 are provided. 26 is provided with a posture switching lever 29 capable of switching the piece 27 to a non-operating posture in which the piece 27 is separated from the spiral groove 25A against the elastic biasing force of the spring 28; A hexagonal shaft 31 with a rotatable operating lever 30 provided near the hexagonal shaft 31 is slidable in the axial direction of the hexagonal shaft 31 together with the piece receiving member 26, and when the operating lever 30 is rotated, A cam member 32 is provided that can switch the piece 27 to a non-working position via a position switching lever 29.

With this configuration, when loading seedlings at the start of rice planting work, even if the seedling platform 10 is stopped in the middle of the horizontal movement path, the pieces 27 can be moved into the helical groove of the helical rotation shaft 25. By switching to the non-working position of separating from 25A, the seedling stand 10 can be manually moved reliably and smoothly to the end of the moving path where planting can begin.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the seedling planting device according to the present invention,
Figure 1 is an overall side view of the walking rice transplanter, Figure 2 is an enlarged longitudinal side view of the main parts, Figure 3 is an enlarged cross-sectional view taken along the line ■-■ in Figure 2, and Figure 4 is an enlarged view of the main parts. The partial cutaway view, FIG. 5, is a sectional view taken along the line ■-V in FIG. 4. 1... Planting arm, 2... First rod for supporting planting claws, 3... Second rod for supporting seedling pusher, 5゜6... ...Contact piece, 5A...Protrusion, 6A, curved, long hole.

Claims (1)

[Scope of utility model registration request] Of the first rod 2 for supporting a planting claw and the second rod 3 for supporting a seedling pusher, which are attached to the planting arm 1 so as to be able to move in and out while being parallel or almost parallel to each other, the second rod 3 is forcibly ejected. The first rod 2 is coupled to the retracting mechanism 4 and urged to move in the projecting direction, and the second rod 3 is attached to both rods 2 and 3.
In order to move the first rod 2 by following it until the first rod 2 is forcibly protruded by a certain amount, contact pieces 5 and 6 are provided that contact each other from the rod axial direction, and one of the circumferential contact pieces 5 and 6 is provided. Piece 5
is provided with a protrusion 5A having a side surface substantially parallel to an imaginary plane connecting the axes of the first rod 2 and the second rod 3, and the protrusion 5A is fitted into the other contact piece 6. A seedling planting device characterized in that a long hole 6A is provided, and the projection 5A is engaged with the long hole 6A to prevent rotation of both rods 2 and 3 about the rod axis.