JPH03183409A - Seedling transplanter - Google Patents

Abstract

PURPOSE:To surely hold a stump of seedling with a retaining pawl when the retaining pawl thrusts into the seedling and move the seeding to seedling-taking- up port by forming the retaining pawl of retaining arm to a specific state and reciprocating the retaining arm in a specific state. CONSTITUTION:Retaining pawls 31 and 31 are thrust into a seedling A, previous to planting operation of planting pawl 3a by pressing force of spring 22 and evacuated in the position separated from the seedling A after planting operation of planting pawl 3a by a cam plate 1. Tip side of the retaining pawl 31 and 31 is formed in state spread forward and retaining pawls 31 and 31 are elastically and laterally opened and operatably attached to a retaining arm 6. The seedling A is pushed out to seedling taking out port 12 in a state surely retained between retaining pawls 31 and 31.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a seedling transplanter for planting, for example, rush, rye, etc. seedlings in a field.

[Conventional technology]

For example, in a rice seedling transplanter for rush grass, like a normal rice transplanter, there is a seedling tray on which the seedlings are placed, and the seedling tray is linked to the reciprocating horizontal feed drive of this seedling tray. The planting claw is rotated in a circular manner to take out the seedlings on the seedling stand and plant them in the field. When the seedling stand reaches the end of its horizontal feed stroke, the seedlings on the seedling stand are sent to the seedling take-out port side. Some have a structure equipped with a vertical feed mechanism.

In the case of the above structure, when the seedlings are sent to the seedling take-out port side by the vertical feed mechanism, the seedlings may float up near the seedling take-out port, and the planting claw may not be able to accurately take out the seedlings. be. In addition, the planting claws usually hold the stem above the root of the seedling, but if the seedling lifts up, they will hold the root, so for crops such as rush, where new shoots grow near the root, , the planting nails may damage the new buds.

Therefore, a holding arm with a holding claw that forcibly moves and holds the leading seedling near the seedling takeout port is provided separately from the planting claw, and this holding arm precedes the planting operation of the planting claw. A structure has been proposed in which the raised seedlings are pushed down to a predetermined position (see Japanese Patent Application No. 1-219366).

[Problem to be solved by the invention]

In the above structure, the holding claw attached to the tip of the holding arm has a structure in which a pair of straight steel wires are attached to the holding arm in parallel.

Therefore, when the left and right pair of holding claws enter the bacteria and push down the seedling, the seedling may not be sufficiently held between the tips of the holding claws. As a result, although the holding claw moves toward the seedling removal port after entering the bacteria, slipping occurs between the holding claw and the seedling, and the seedling does not move toward the seedling removal port. This results in poor planting.

Here, an object of the present invention is to configure the holding claw so that the seedling can be reliably moved to the seedling take-out port.

[Means to solve the problem]

A feature of the present invention is that the seedling transplanter as described above is configured as follows. In other words, a holding arm is provided with a pair of right and left holding claws for forcibly moving and holding the leading seedling near the seedling removal port, and the tip side of the holding claw is formed in a shape that widens toward the tip. The claw is attached to the holding arm so that the claw can be elastically opened left and right and can be operated, and the holding claw is at a position where the holding claw enters into the bacteria prior to the planting operation of the planting claw.
The present invention is provided with a mechanism that reciprocates the holding arm to a position where the holding claw leaves the seedling after the planting operation of the planting claw, and its functions and effects are as follows.

[For production]

When the holding claws are configured as described above, when the holding claws (31), (31) rush into the seedling (A), as shown in FIG. ).

(31)'s flared tip (31a), (31a
), the seedling (A) enters through the holding claws (31), (31
) to the left and right.

Therefore, due to the elastic force of the holding claws (31), (31) trying to close, the seedling (A) is moved between the left and right holding claws (31), (31).
The seedling (A) is reliably held between the two, and the seedling (A) is pushed out to the seedling outlet in this securely held state.

〔Effect of the invention〕

As described above, the structure can be configured such that one seedling is securely held by the holding claw when the holding claw enters the bacterium, and the holding claw allows one seedling to be placed in the seedling extraction port. It is now possible to move the seedlings reliably and to plant them while the planting claws hold the seedlings at a predetermined position.

This makes it possible to prevent a poor planting situation in which the planting claws cannot properly hold the seedling because the seedling is not in the predetermined position of the seedling take-out port.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

Figure 2 shows the overall side view of the rice seedling transplanter, in which a crank arm (2) that is rotatably driven at the rear of a planting mission case (1) has a planting claw (3a) and a seedling extrusion part (
3b) is attached, and a holding arm (6) is attached to a pair of front and rear links (4) and (5) provided at the top of the planting mission case (1). There is. A seedling stand (8) is provided that is driven to slide back and forth along a guide rail (7) fixed to the top surface of the planting mission case (1), and a seedling stand (8) is mounted on a float at the bottom of the planting mission case (1). (13) is supported to constitute a rice grass seedling transplanter.

With the above structure, the seedling stand (8) is connected to the guide rail (7).
), and while the seedling stand (8) is stopped, the planting nails (3a
) passes through the seedling take-out port (■2) of the guide rail (7), takes out the seedling (A), and plants it in the field (G).

As shown in Figure 5, the strawberry seedlings (A) placed on the seedling stand (8) are placed between large partition plates (9) on the left and right, and a number of partition plates (10) are placed between the large partition plates (9) to remove the seedlings. - plants are placed in a row in units arranged at a pitch corresponding to the width of the mouth (2). Then, use the seedling scooping board on the bottom (23
), and place the left and right cutting boards (9) on the seedling stand (8).
) on the partition part (8a).

On the other hand, when the seedling rest (8) reaches the stroke end of the reciprocating slide, the seedling (A) is guided downward as shown in Figure 2.4.5. Rail (7
) side is provided with a belt-type vertical feeding mechanism (11). The drive structure of this vertical feed mechanism (11) is configured as follows. In other words, the support arm (2) that drives the seedling stand (8) to feed it along the guide rail (7)
A support shaft (25) is rotatably attached to the support shaft (25), and a first arm (26) and a second arm (27) having a cross-shaped shape when viewed from the side are fixed to the support shaft (25). and an arm (llb) of a one-way clutch (not shown) installed in a drive roller (lla) in the vertical feed mechanism (11).
and the first arm (26).
has been erected.

With the above structure, when the seedling stand (8) reaches the stroke end, the crank arm (29) on the planting mission case (1) side rotates counterclockwise and moves the second arm (27> upward in the paper). As a result, the drive roller (lla) rotates by a set angle to vertically feed the seedling (A), and the second arm (27) etc. return to the posture shown in Fig. 2.In this case, the support arm (24) is provided with a set bolt (30), and this set bolt (30
) is moved in and out in the left-right direction on the paper, the initial posture of the second arm (27) shown in FIG. 2 is changed and adjusted. As a result, the amount by which the second arm (27) is moved by the crank arm (29) is changed, and the vertical feed mechanism (1
1) The feed stroke can be adjusted.

Then, as shown in Figure 2.4.5, there is a seedling stand (8).
At the bottom of the , there are seedlings (
A) A plate (14) is fixed to the root section, which is divided into the number of plants to be taken out by the planting claw (3a) while lifting and guiding the root section. The base plate (14) is made of a thin plate having a triangular shape when viewed from the side, and the rear portion thereof is curved upward. and,
As shown in Figure 4, the plates (14) are arranged at the same pitch as the width of the seedling outlet (12), and the setting stroke of the intermittent feeding of the seedling rest (8) is also arranged at the same pitch as the width of the seedling take-out port (12), as shown in Figure 4. is a board (
14) and the width of the seedling outlet (12).

To explain further, as shown in FIGS. 2 and 4, a freely rotatable pulley (15) is arranged on the guide rail (7) so as to sandwich the seedling outlet (12). ) is wrapped with a rubber belt (1G) with protrusions. As a result, when the seedling stand (8) is sent along the guide rail (7), the frontmost part of the seedling (A) rests on the rubber belt (16) and is attached to the seedling stand (8) without collapsing. This means that the information will be sent to

Next, the holding claw (
31) and (31) will be explained. As shown in FIGS. 1 and 2, the holding claws (31), (31) are made of a spring material such as piano wire, and the holding claws (31), (31) are made of a spring material such as piano wire.
1) It can be elastically deformed.

And the tip part (31a) of the holding claw (31), (31)
, (31a) The middle part (31
b) The holding claws (31), (31) are bent into a flared shape so that the interval (L2) between (31b) and It is fixed at (6).

Next, the drive structure of the holding arm (6) will be explained.

As shown in Figures 2 and 3, the crank arm (2)
A cam plate (
18) is fixed, and the power is transmitted through the transmission chain (19).
is transmitted through the support shaft (17) and the cam plate (
18>, the planting arm (3) is rotated counterclockwise in the drawing.

On the other hand, in the front link (4) that supports the holding arm (6), the arm (21) is fixed to a support shaft (20) fixed to the base of this link (4). A roller (21a) at the tip of the arm (21) is brought into contact with the outer peripheral surface of the cam plate (18). Furthermore, a spring (22) is installed between the upper surface of the planting mission case (1) and the link (4), and the urging force of this spring (22) causes the holding arm (6) to move to the seedling stand (8). ) side.

Next, the movements of the planting arm (3) and the holding arm (6) will be explained. In Figure 2, the planting arm (3) is the seedling (A).
The holding arm (6) is in a retracted position away from the seedling (A) with the roller (21a) of the arm (21) riding on the outer peripheral surface of the cam plate (18). When the support shaft (I7) rotates counterclockwise and the planting claw (3a) at the tip of the planting arm (3) reaches in front of the seedling removal port (12), as shown in FIG. Arm (21)
The roller (21a) of the notch (18) of the cam plate (I8)
I feel depressed about a).

As a result, the holding arm (6) moves to the left in the drawing due to the biasing force of the spring (22) and enters into the seedling (A). In this case, as shown in FIG. 1, one seedling (A) is attached to the tips (31, a) of the holding claws (31), (31).

Enter from the (31a) side and hold the retaining claws (31), (31)
Push it left and right and expand it. And the seedling (A) is in the middle part (
Holding claws (31), (31b) near (31b), (31b)
1), the leading seedling (A) is pushed down. Then, the planting claw (3a) of the planting arm (3) passes through the seedling take-out port (12), and the − stock seedling (A
) is held between the planting claw (3a) and the seedling extrusion part (3b) and taken out.

Then, the support shaft (17) further rotates and the planting claw (3a
) enters the field (G), the seedling pushing part (3b) pops out, the seedling (A) separates from the planting claw (3a), and the seedling (A) enters the field (G).
G). Then, the arm (21) is pushed up by the cam plate (I8), the link (4) is swung to the right in the drawing, and the holding claw (31) returns to the retracted position away from the seedling (A).

In addition, as shown in FIGS. 6 and 7, the seedling extrusion part (3b)
A rubber block (32) is fitted to the tip of the
The upper surface of the block (32) is inserted between a pair of planting claws (3a). This ensures that the seedlings (A) that have gotten between the planting claws (3a) are pushed out when the seedling push-out part (3b) sometimes pops out during planting.

Although the above explanation is for transplanting rushes using the holding arm (6) and the planting arm (3), this seedling transplanter can also be used for planting rice. In this case, the link (5) of the holding arm (6) is connected and fixed to the connecting part (la) of the planting mission case (1) with a pin (not shown) in the posture shown in FIG.

In other words, rice is planted only using the planting arm (3) without using the holding arm (6).

[Another example]

Holding claws (31), (31) on holding arm (6)
The shape may be as shown in FIG. Furthermore, it is possible to move the holding arm (6) to a pair of left and right holding claws (3) more simply.
1) and (31) may be linearly extended in parallel and bent to open left and right near the tip.

Furthermore, the holding claws (31), (31) may be made of leaf springs instead of piano wire. In addition, the holding claw (31),
(31) The holding claws (31) are configured to be rigid claws, and the holding claws (31) are swingably attached around the vertical axis of the holding arm (6).

(31) may be provided with a spring on the holding arm (6) to urge them toward each other.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

The drawings show an embodiment of the seedling transplanter according to the present invention, FIG. 1 is a plan view of the vicinity of the holding claw, FIG. 2 is an overall side view of the seedling transplanter,
Figure 3 is a side view showing the state in which the holding claw has entered the bacteria from the state shown in Figure 2, Figure 4 is a plan view of the vicinity of the seedling retrieval opening in the seedling rack, and Figure 5 is a side view showing the state in which the holding claw has entered the bacteria. FIG. 6 is a side view of the vicinity of the tip of the planting arm; FIG. 7 is a view taken from the ■-■ direction in FIG. 6; FIG. FIG. 3 is a plan view of the vicinity of the nail. (3a)... Planting claw, (6)... Holding arm, (8)... Seedling stand, (11)...
... Vertical feed mechanism, (12) ... Seedling take-out port,
(31)... Holding claw, (A)... Seedling,
(G)・・・・・・Field.

Claims (1)

[Claims] A seedling tray (8) on which crop seedlings (A) are placed and a seedling take-out port (
12) Take out the seedlings (A) from the seedling stand (8) and place them in the field (
When the planting claw (3a), which is driven to rotate in a circular manner, and the seedling tray (8) reach the end of the stroke of horizontal feeding, the seedlings (A) on the seedling tray (8) are planted. ) to the side of the seedling take-out port (12), the seedling transplanter is equipped with a vertical feeding mechanism (11) that sends the seedlings (A) near the seedling take-out port (12) to the seedling take-out port (12). A holding arm (6) is provided with a pair of right and left holding claws (31), (31) that are forcibly moved and held, and the tip sides of the holding claws (31), (31) are formed in a tapered shape. , and a holding claw (31),
(31) can be elastically opened left and right to operate the holding arm (
6), and the position where the holding claws (31), (31) plunge into the seedling (A) prior to the planting operation of the planting claw (3a), and the planting action of the planting claw (3a). This seedling transplanter is equipped with a mechanism for reciprocating the holding arm (6) to a position where the holding claws (31) are separated from the seedling (A) after the attachment operation.