JPH0436113A - Seedling-inserting claw-driving device in seedling-inserting machine - Google Patents

Abstract

PURPOSE:To inhibit the adhesion of soil to insertion claws and prevent the failure in the nipping of a seedling with the claws by disposing a claw-opening or closing mechanism for half-opening the seedling inserting claw during a claw-lifting process in a seedling-inserting claw-driving device. CONSTITUTION:A seedling-inserting claw-opening or closing mechanism for half-opening the claw during a claw-lifting process is disposed in a seedling- inserting claw-driving device, whereby since the claw is fully opened for the planting of the seedling and subsequently lifted in a half-opened state, the adhesion of soil to the claw is reduced and the failure in the nipping of the seedling with the claw is effectively prevented and, when the seedling is inserted into a mulching film-applied row, the breakage of the mulching film is effectively prevented on the escape of the claw from the ground.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a seedling claw drive device for a seedling machine that plants seedlings by opening and closing the claws while moving the seedling claws up and down.

(Prior art) In conventional seedling cutting machines, the seedling claw drive is configured to fully open the seedling claw at the bottom dead center, fully close the seedling claw immediately after releasing the seedlings, and then raise the seedling claw in the fully closed state. The device is known.

(Problems to be Solved by the Invention) In this conventional seedling cutting machine, the cutting claws close in the ground after planting the seedlings, so there is a risk that mud may adhere between the cutting claws and cause poor gripping of the seedlings. In addition, since the seedling claws fully close immediately after fully opening at the bottom dead center and releasing the seedlings, there is also the problem that the seedlings that have been planted once again are pinched and brought back to the ground.

In order to avoid such problems, after planting seedlings, you can raise the seedling claws fully open without closing them, and when planting seedlings in a mulched ridge, the seedling claws will rise above the ground. This has the disadvantage that the cutting nails that open the mulch will damage it when it escapes.

Therefore, the present invention prevents mud from adhering between the cutting claws, prevents the planted seedlings from being pinched again and brought back to the ground, and furthermore, when cutting seedlings into mulched ridges, the rising cutting claws are used to mulch the seedlings. It is an object of the present invention to provide a seedling cutting claw drive device having a claw opening/closing mechanism that does not damage the seedlings.

(Means for Solving the Problems) In order to achieve the above object, the seedling claw drive device of the present invention is provided with a claw opening/closing mechanism that half-opens the seedling claw during the upward stroke of the seedling claw.

(Function) When the seedling claw drive device of the present invention is started, the seedling claw opens and closes as the planting rod moves up and down.The opening and closing operation will be explained step by step based on FIG. 1 of the embodiment. , as follows.

■The seedling claws 4 and 14, which are fully open at the top dead center, pinch the seedling S and then close completely to pinch the seedling, ■Move to the bottom dead center in the ground while fully open and plant the seedling, ■Bottom dead center Fully open the cutting claws and release the seedlings. After that, open the cutting claws halfway and rise, and return to ■.

(Example) The seedling cutting machine implementing the present invention shown in FIGS. 6(a) and 6(b) straddles a ridge 56 by means of left and right front wheels 54.54 and drive wheels 55°55, and rotates the drive wheels 55.55. move forward.

When the operator sets seedlings S, such as sweet potato vines, one by one on the seedling supply table 42 of the seedling supply device T, the seedling claws 4 and 14 of the planting rod 2 receive the seedlings S from the seedling supply device T. Te ridge 5
6. Plant in sequence.

The claw opening/closing mechanism of the seedling claws 4 and 14 is as shown in FIG.
A connecting link L is provided along the planting rod 2, and its base is attached to the movable cam 19 and the other end is attached to the seedling claw 14. And two fixed cams B and C with different cam surface shapes.
are provided, and pins PL, P2 . attached to the movable cam 19. P3
Of these, P3 slides into contact with the cam surface of the fixed cam C that protrudes forward, not during the downward stroke but only during the upward stroke, so that the movable cam 19 moves to different positions during the downward stroke and the upward stroke. The movable cam 19 moves the connecting link L to fully close the seedling claws 4 and 14 in the downward stroke, fully open them at the bottom dead center, and then half open them in the upward stroke.

Moreover, this claw opening/closing mechanism can also be configured to similarly open and close the seedling claw by half-opening it during the upward stroke by utilizing an electrical method.

Examples will be described with reference to the drawings.

The first embodiment shown in FIGS. 1 to 5 uses a mechanical method for the pawl opening/closing mechanism.

In FIG. 1, the base 2a of the planting rod 2 is pivotally supported on the vehicle body of the seedling planting machine. A crank arm 31 is fixed to the output shaft of the engine R, and its tip and the implanted rod 2 are connected by a link 32. A seedling rod 3 is fixed downward to the tip of the planting rod 2, and a fixed seedling claw 4 is fixed to the lower end of the seedling rod 3.

A movable seedling claw 14 is pivoted to the base of the fixed seedling claw 4, an arm 15 is fixed to the other end of the shaft, and rods 13 and 12 are inserted from the tip of the arm 15 parallel to the seedling rod 3 and the planting rod 2, respectively. and set it up. The bell crank 11 has both ends connected to rods 13.
, 12.

Also, the rod 12 has a bell crank 11 and a rod guide 2.
0 and a spring 18 is wound around it.

Projections 7, 8, and 9 are provided on the implantation rod 2, the bent portion of the bell crank 11 is pivoted to the projection 7, the rod guide 20 is fixed to the projection 8, and the upper end of the movable cam 19 is attached to the projection 9. Attach to the shaft. Here, the rod 12 is pulled toward the tip of the implanted rod 2 by the elasticity of the spring 18, and the movable cam 19 is moved by three pins P1, P2, . P3, it slides into contact with any of the fixed cams A, B, and C fixed to the vehicle body 1.

Note that the fixed cam A looks above the fixed cam B, and the fixed cam C projects in front of the fixed cam B.

The rod 12, 13, the bell crank 11 and the arm 15 constitute an articulating link L.

In FIG. 2, the base of the connecting link L is rotatably attached to the movable cam 19. The movable cam 19 is rotatably attached to the projecting piece 9 at a fulcrum 19a and to the rod 12 at a fulcrum 19b. Pin Pi P2. P3 are arranged and pivoted at the positions shown in FIG. 2 on the movable cam 19, respectively.

As shown in FIG. 3, pin P3 is attached to the outer end of shaft 51. The shaft 51 has a spring 50 wound around it, and
It is inserted into the movable cam 19 so as to be freely inserted into and removed from it, and a bolt 52 is screwed onto the inner end of the shaft 51 to prevent the shaft 51 from being pulled out from the movable cam 19 due to the elastic force of the spring 50. 53 indicates a collar that passes through the movable cam 19.

On the side surface of the upper end of the fixed cam C on the movable cam 19 side, as shown in FIG.
will be established.

In FIG. 5, the output shaft of the engine R is further provided with a sprocket 33, a chain 35, a sprocket 34, and bevel gears 36 and 37. A shaft 43 along the traveling direction of the vehicle body is fixed to the bevel gear 37, and a sprocket 39 is fixed to the shaft 43. A sprocket 38 is provided on the side of 39, and a sprocket 40 is provided below 39, and a chain 41 for conveying a seedling stand is wound around them. Sprockets similar to the sprockets 38, 39 and 40 are also arranged at the rear of the seedling feeding device T, and a chain is wound around them in the same manner as the chain 41.

The front and rear ends of a large number of seedling stands 42 are screwed between these two chains, respectively. A spring-type seedling holder 44 for setting seedlings S is provided on the upper surface of the seedling feeding table 42. Bevel gear 3
7 rotates, the seedling feeding table 42 is moved by the sprockets 38 and 39.
．． Rotate around 40.

When the output shaft of the engine R is rotated, power is transmitted to the stud 2 via the crank arm 31 and the link 32.
The implantation rod 2 reciprocates in the vertical direction using its base 2a as a fulcrum.

As the implantable rod 2 rises, the pin P1 of the movable cam 19 comes into sliding contact with the cam surface of the fixed cam A (Fig. 4b), and the entire movable cam 19 rotates clockwise and pulls the connecting link L, so that the movable cam 19 is movable. The seedling claw 14 is fully opened.

Here, the seedling S is moved by the seedling feeding device T to the lower seedling feeding position and is applied to the fixed seedling claw 4.

As the implantation rod 2 descends from the top dead center, the movable cam 19 rotates counterclockwise along the sliding surface of the fixed cam A due to the elasticity of the spring 18 (Fig. 4C), so that the connecting link L Moving toward the tip, the movable seedling claw 14 closes and grips the seedling S between it and the fixed seedling claw 4.

As the planting rod 2 further descends, the closed tip of the fixed seedling claw 4 on the ground surface cuts the mulch and enters the ground.

At this stage, as the implantable rod 2 descends, the pin P3 of the movable cam 19 comes into contact with the inclined surface C1 provided on the inner surface of the upper end of the fixed cam C on the movable cam 19 side, and is pushed toward the movable cam 19. Then, move while tracing the inner surface of the fixed cam C.

At the bottom dead center of the planting rod 2, the pin P2 comes into sliding contact with the cam surface Bl of the fixed cam B (Fig. 4 d), and the entire movable cam 19 rotates clockwise, so that the movable seedlings are moved through the connecting link L. The claw 14 is fully opened and the seedling S is let go.

On the other hand, pin P3 comes off the side of fixed cam C, and spring 5
After restoring to its original length due to the elasticity of 0, it comes into sliding contact with the cam surface C2 of the fixed cam C (Fig. 4e).

When the implanted rod 2 starts to rise, the pin P3 rolls on the cam surface C2 of the fixed cam C (Fig. 4 f), so the movable cam 19 follows this cam surface C2 of the fixed cam C that protrudes forward. After slightly rotating in the counterclockwise direction, the pin P3 continues to rise without rotating until it escapes upward from the cam surface C2 of the fixed cam C that projects forward. Therefore, the movable seedling claw 14 rises while remaining half open.

After the planting rod 2 further rises and leaves the mulched ridge surface, the pin P3 eventually comes off upward from the upper end of the cam surface C2 of the fixed cam C, so the movable cam 19 is rebounded by the elasticity of the spring 18. Rotating clockwise, the movable seedling claw 14 closes via the connecting link L (FIG. 4a). In this state, the pins PL, P2, and P3 are all separated from the cams A, B, and C, and the elasticity of the spring 18 is concentrated on the movable seedling claw 14.

The implanted rod 2 then reaches top dead center again. These operations are repeated below.

The second embodiment shown in FIGS. 7 and 8 uses an electrical method for the pawl opening/closing mechanism.

Along the planting rod 2 and the cutting rod 3, the rod 12. ]3. A connecting link L consisting of a bell crank 11 and an arm 15 is provided. Then, a reciprocating device M consisting of a rack 76, a pinion 77, and a stepping motor 78 is installed on the implantation rod 2,
The base of the rod 12 is connected to this.

A disk-shaped switch plate Q with a protrusion Q1 provided at one location on the outer periphery is provided on the output shaft of the engine R, and a micro switch 60, 61, which is fixed in position along the outer periphery of the switch plate Q on the vehicle body.
62.63 will be installed.

The operation of the switch by the switch plate Q is shown in FIG.

When the protrusion Q1 touches the switch 60 and turns it on,
When the seedling claw 14 is fully opened and the protrusion Q1 turns on the switch 61, the seedling claw 14 is fully closed.When the protrusion Q1 turns on the switch 62, the seedling claw 14 is fully opened again, and when the protrusion Q1 turns on the switch 63, the seedling claw 14 is fully closed. Appropriate circuits are connected to these switches 60 to 63 and the stepping motor 78 so that the seedling claw 14 is half-opened.

When the output shaft of engine R is rotated counterclockwise, the link 32 moves from the crank arm 31 attached to the output shaft.
Power is transmitted to the implantable rod 2 via the implantable rod 2, and the implantable rod 2 reciprocates in the vertical direction about the base 2a as a fulcrum, as in the case of the mechanical method described above.

The switch plate Q attached to the output shaft is connected to the crank arm 31
and rotate counterclockwise.

At the same time as the implanted rod 2 reaches the top dead center, the protrusion Q of the switch plate Q
1 turns on the switch 60, thereby starting the stepping motor 78, the pinion 77 rotates clockwise, pulling the rack 76 and the connecting link L over the entire length of the gear of the rack 76, and fully opening the seedling claw 14.

At the same time as the implantable rod 2 begins to descend, the protrusion Q1 of the switch plate Q turns on the switch 61, and the stepping motor 7
8 is activated, the pinion 77 rotates counterclockwise and pushes out the connecting link L over the entire length of the gear of the rack 76,
The seedling claw 14 is fully closed to grasp the seedling S.

At the same time as the implantable rod 2 reaches the bottom dead center, the protrusion Q1 of the switch plate Q turns on the switch 62, the stepping motor 78 starts, the pinion 77 rotates clockwise, and the rack 76 and the connecting link L are turned on. The rack 76 is pulled over the entire length of the gear, and the seedling claws 14 are fully opened again to release the seedlings S.

At the same time that the implantable rod 2 escapes from the bottom dead center and begins to rise, the protrusion Q1 of the switch plate Q turns on the switch 63, the stepping motor 78 starts, the pinion 77 rotates counterclockwise, and the rack 76 and the articulated The link L is pushed out over half the length of the gear of the rack 76, and is removed from the ground with the movable seedling claw 14 half open.

The implanted rod 2 then reaches top dead center again. These operations are repeated below.

(Effects of the Invention) Since the present invention is configured as described above, it produces the effects described below.

By providing the above-mentioned claw opening/closing mechanism in the seedling claw drive device, after the seedling claws are fully opened and the seedlings are planted, the seedling claws rise underground in a half-open state, which prevents mud from adhering to the seedling claws. In addition, when seedlings are planted in mulched ridges, damage to the mulch when the seedling claws escape from the ground can be effectively prevented.

[Brief explanation of drawings]

Fig. 1 is an overall side view of a seedling cutting device embodying the present invention;
The figure is an enlarged view of the main parts, Figure 3 is an enlarged perspective view of Figure 2, Figures 4 (a) to (f) are explanatory diagrams of the operation of the movable cam, and Figure 5 is a perspective view of the seedling cutting device and seedling feeding device. Figure 6(a) and (
b) is a plan view and a side view of a seedling machine embodying the present invention, FIG. 7 is an overall side view of a seedling inserting device according to another embodiment of the present invention, and FIG. 8 is an explanatory diagram of the operation of the switch plate thereof. .

Claims (1)

[Claims] In a seedling machine that descends with the seedling claws fully closed and clamps the seedlings, fully opens at the bottom dead center to release the seedlings, and then ascends after planting, a claw that half-opens the fully opened seedling claws during the upward stroke of the seedling claws. A seedling claw drive device comprising an opening/closing mechanism.