JPS6233533Y2 - - Google Patents

Description

[Detailed description of the invention] In the conventional rice transplanter, the amount of pine seedlings stored in the seedling tray can be adjusted by changing the mounting position of the seedling receiving plate installed at the feed-out port of the seedling tray. was, but
The device that feeds out seedlings in the vertical direction is a metered feed system, and the amount of feed cannot be adjusted.
It was constructed so that the necessary seedlings could be fed out when the amount taken out was maximized. Therefore, if the position of the seedling receiving plate is adjusted to a position below the maximum amount, the pine seedlings will be compressed due to the excessive amount of seedlings being fed out, making it impossible to take out the specified number of seedlings, and causing damage to the roots of the seedlings. A failure has occurred. In the present invention, a horizontal shaft to which a feeding body is attached is supported on the back of a seedling stand, and the horizontal shaft has a
A sliding arm is pivotally mounted at the horizontally moving end of the seedling platform, and engages with and rotates a vertical feed drive body that always swings back and forth within a certain range, thereby causing the feeding body to rotate intermittently. In a rice transplanter whose return position is regulated to be a constant position with respect to the seedling stand, the mounting angle of the vertical feed drive body is selected on a serration carved at the end of the rotating shaft parallel to the horizontal axis. The mounting position of the seedling receiving plate can be changed by inserting and fixing the seedling receiving plate in a fixed manner, and changing the end position of the engagement action of the vertical feed drive body with respect to the sliding arm in a stepwise manner, thereby making it possible to adjust the amount of rotation of the feeding body. The present invention aims to provide a device that can quickly and reliably adjust the amount of seedlings to be fed as appropriate, thereby eliminating the drawbacks of the conventional technology.

An embodiment of the present invention will be explained with reference to the drawings.
In Figs. 1 and 2, 1 has an engine 2, a transmission 3, etc. mounted on the front, wheels 4 are mounted in the middle via a chain case, and a planting rod 5 that moves up and down is mounted on the rear. A seedling stand 6 that reciprocates left and right is erected,
This is a machine frame of a rice transplanter equipped with a float 7 at the bottom.The power of the engine 2 is distributed to the wheels 4 and the planting section by the transmission 3, but the power to the planting section is transmitted to the machine frame 1.
The power is transmitted by a built-in transmission mechanism to a crankshaft 8 that drives the planting rod 5 and to a drive mechanism for a seedling stand 6, which will be described later.

Next, the drive mechanism of the seedling platform 6 is shown in FIGS. 3 to 6.
To explain the figure, 9 is a screw case connected to the rear of the machine frame 1, and a screw shaft 10 is mounted on an internal shaft, and the screw shaft 10 is rotated by the power of the engine 2. It is driven by a sprocket 11 via a rotating shaft 12, replacement sprockets 13 and 14, and a chain 15. Incidentally, these sprockets 13, 14, etc. are housed in a chain case 15' connected to the right side of the screw case 9. Further, a slide block 16 that fits into the screw shaft 10 and is guided by its screw groove is fixed to a slide bar 17 that is parallel to the screw shaft 10 and protrudes from both sides of the screw case 9. Both sides of the seedling stand 6 are connected and supported by brackets 18, 18 on both sides of the slide bar 17.

12 cutout windows 1 bored in the bottom of the seedling stand 6
At 9, a part of a ring-shaped feeding body 21 fixed to a horizontal shaft 20 supported on the back side of the seedling stand 6 and having a large number of protrusions on the outer circumferential surface extends from below to above. Ratchet wheels 22, 22 are fixed with pins to protruding portions of the horizontal shaft 20 facing the central partition wall and right side wall of the seedling stand 6. Further, the base of the sliding arm 25 to which the roller 23 is attached at the tip with a screw 24 is fitted onto the horizontal shaft 20, and a claw plate 26 made of a leaf spring fixed to the side surface of the sliding arm 25
are three claws 26a, 2 formed by bending on the outer periphery.
6b and 26c are integrally provided, and these pawls are in pressure contact with the opposing ratchet teeth at a displacement of 1/3 of a tooth pitch, so that one (for example, the right side) ratchet wheel 22,
When the attached pawl plate 26 is rotated, one of the other pawl plates 26 always engages the bottom of one of the teeth of the ratchet wheel 22, so that the right pawl plate 26 that is rotationally driven is rotated. When rotating back due to the action of the biased return spring 33, reversal of the ratchet wheel 22, horizontal shaft 20, etc. can be reliably prevented. Above return spring 3
3 is hooked at one end to the sliding arm 25 and at the other end to the protrusion of the seedling stand 6.

On the other hand, on the right end of the camshaft 27 supported in the chain case 15' near and parallel to the rotational shaft 12, there is a driven cam 29 that engages with and rotates the main drive cam 28 supported on the rotational shaft 12. is fixed, and the camshaft 2
As shown in FIG. 6, a serration groove 30 is carved in the left end of the chain case 15', and a vertical feed drive body 31 having an arcuate planar shape selectively steps the mounting angle. It is fitted and inserted so as to be changeable, and is fixed by a nut 32. When the seedling platform 6 reaches the end of its left and right horizontal movement, the tip of the vertical feed drive body 31 engages with the roller 23 at the tip of the sliding arm 25, causing the sliding arm 25 to rotate. It's summery. 34 is a return spring for the vertical feed drive body 31, one end of which is attached to the vertical feed drive body 31;
The other end is hooked to the chain case 15'.

Next, the adjustment of the amount of seedling delivery will be explained with reference to FIGS. 5a and 5b. FIG. 5a shows a state in which the amount of pine seedlings fed out is maximized, and the vertical feed drive body 31 is oscillated by the rotation of the driving cam 28 and the driven cam 29 at the horizontally moving end of the seedling platform 6. When the roller 23 is pushed up, the sliding arm 25 moves to α
At the same time, the pawl 26b rotates the ratchet wheel 22, and the rotation of the feeding body 21 moves the pine seedlings on the seedling stand 6 toward the seedling receiving plate 35.
Pay out x ₁ . The vertical feed drive body 31 is connected to the main drive cam 2
When the protruding portion 8 is disengaged, it rotates back in the opposite direction due to the action of the return spring 34, and since the sliding arm 25 is urged in the return direction by the return spring 33, it immediately rotates in the reverse direction. , sliding arm 25
stops at a certain position where the locking part comes into contact with the back surface of the seedling stand 6.

Further, as shown in FIG. 5b, the vertical feed drive body 31
is fixed to the camshaft 27 with the nut 32 at a position shifted counterclockwise, the vertical feed drive body 31
The reciprocating swing range of the sliding arm 25 is changed in the swinging direction, the engagement end position of the vertical feed drive body 31 with respect to the sliding arm 25 is changed, and the swinging angle β of the sliding arm 25 becomes smaller than α, so that the mat The amount of seedling release x ₂ is also less than x ₁ .

As mentioned above, in the present invention, the horizontal shaft to which the feeding body is attached is supported on the back of the seedling platform, and the horizontal shaft is provided with a vertical feed that always swings back and forth within a certain range at the end of the horizontal movement of the seedling platform. a sliding arm that engages with a drive body and rotates to cause the feeding body to rotate intermittently;
In a rice transplanter in which the return position of the sliding arm is regulated to be a constant position with respect to the seedling stand, the vertical feed drive body is attached to a serration carved at an end of a rotating shaft parallel to the horizontal axis. Since the angle is selectively inserted and fixed, and the end position of the engagement action of the vertical feed drive body with respect to the sliding arm is changed in a stepwise manner, the amount of rotation of the feeding body can be adjusted, thereby making it possible to remove the seedlings. To adjust the amount, the amount of rotation of the feeding body is adjusted to the mounting position of the seedling receiving plate without changing the mounting position of the feeding body, keeping the engagement between the feeding body and the bottom of the pine seedling in the initial setting. It can be quickly and easily adjusted to accommodate changes and does not compress the pine seedlings.
It prevents damage to the roots of seedlings and allows you to always take out the specified number of seedlings.

Furthermore, since a serration mechanism is used to attach the vertical feed drive body, the mechanism is simple and securely fixed, and the attachment angle will never change accidentally due to vibrations of the rice transplanter.

Furthermore, the present invention has the advantage that it can be applied to a rice transplanter in which the amount of seedlings taken out is adjusted by changing the rotation locus of each planting rod while keeping the seedling receiving plate fixed at a fixed position.

[Brief explanation of drawings]

The drawings show an embodiment of a rice transplanter equipped with the device of the present invention. Figure 1 is an overall side view of the rice transplanter, Figure 2 is a plan view of the main parts, and Figure 3 is a diagram of the main parts. FIG. 4 is an enlarged side sectional view of the main parts; FIGS. 5a and 5b are action explanatory views of the main parts;
FIG. 6 is an exploded perspective view of the main parts. 1... Machine frame, 6... Seedling stand, 12... Rotating shaft,
21... Feeding body, 22, 22'... Ratchet wheel, 25, 25... Sliding arm, 27... Camshaft, 28... Drive cam, 29... Driven cam, 31
...Vertical feed drive body.

Claims (1)

[Scope of utility model registration request] The horizontal shaft to which the feeding body is attached is supported on the back of the seedling platform, and the horizontal shaft is engaged with and rotated by a vertical feed drive body that always swings back and forth within a certain range at the horizontally moving end of the seedling platform. In the rice transplanter, a sliding arm that rotates the feeding body intermittently by being moved is pivotally mounted, and a return position of the sliding arm is regulated to be a constant position with respect to the seedling stand. is selectively fitted and fixed at a mounting angle into a serration carved at an end of a rotating shaft parallel to the horizontal axis, and the end position of the engagement action of the vertical feed drive body with respect to the sliding arm is changed in a stepwise manner. A seedling dispensing device for a rice transplanter, characterized in that the amount of rotation of the dispensing body is adjustable.