JPH06253622A - System for delivering and planting seedling - Google Patents

Abstract

PURPOSE:To obtain a mechanism for delivering seedlings with a roller, inserting the seedlings into soil and planting the seedlings. CONSTITUTION:This mechanism for delivering and planting seedlings is equipped with downward directing disks 2 and 3, protrusively and radially installing seedling nipping arms 4 and seedling pressing arms 7 at a regular interval from each, circumscribing each seedling pressing roller 8 about each seedling delivering roller 6 at the tip, circumscribing the seedling pressing roller 8 about the seedling delivering roller 6 against the elastic force of an elastic means 9 with a seedling pressing guide 10 during the period in which the tip of each seedling pressing arm 7 is pressed from the outside with the elastic means 9, outwardly turned around a pivot 28, separated from the seedling delivering roller 6 and brought into slide contact with the outside surface of the seedling pressing arm for a suitable length to a downward vertical position of the seedling nipping arm in rotation and nipping the root of a seedling (S). A seedling delivering and driving roller 19 rotating counterclockwise when viewed from the rear of the lower end is circumscribed about the seedling delivering roller 16 and separated therefrom by contact of a cam follower roller 18 in the intermediate part of a driving intermittent arm 17, having the tip pivoted on a machine frame 1 and hanging therefrom with a recessed part 14 and a protruding part 15 of a ring- shaped cam 13 peripherally installed on the disk 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a mechanism for feeding and planting sweet potato seedlings by rollers.

[0002]

2. Description of the Related Art Sweet potatoes are seed potatoes laid in a hotbed to grow seedlings, and the vines are cut to a length of about 25 cm.
Plant in the ridge. There are various methods of planting, such as upright planting, lick planting, and hanging needle planting. Generally, the ridges are about 90 cm in height, and the height of about 25 cm to 30 cm is mountain-shaped. Are planted in.
The planting depth of the seedlings is required to be about 7 cm, and currently there is no machine planting possible at this depth, so planting is done manually.

[0003]

As described above, the planting of seedlings by human power is a work in which the waist is bent between the ridges that are difficult to walk, so that fatigue is large and the efficiency is low. Therefore, the inventor paid attention to the fact that the sweet potato seedlings are stick-shaped and have a considerable hardness, and the soil in the field at the time of planting is soft, and various experiments were conducted in order to enable efficient mechanical planting. went. as a result,
It was found that if the seedlings were straightened out toward the surface of the ridge, the seedlings could be put into the soil and planted deeply. The present invention is based on the above knowledge and aims to provide a mechanism capable of directly feeding out and planting sweet potato seedlings and coping with a predetermined planting pitch.

[0004]

In order to achieve the above object, according to the present invention, a central portion is fixed to a shaft which is horizontally rotated in a forward and downward direction in a machine frame, and two disks are provided side by side. A seedling sandwiching piece is provided in the middle part, and a seedling sandwiching arm, which has a seedling feeding roller (hereinafter abbreviated as feeding roller) that follows the direction of rotation of the disc at the tip, is of equal length from the inner surface of one disc. Protruding radially at equal intervals. On the other disk, an intermediate portion is pivotally attached to the outer peripheral edge of this disk, and a seedling pressing arm having a seedling pressing roller rotatably supported on the feeding roller is provided to project radially from the disk. Further, a bullet machine is provided which pivots the seedling holding arm outwardly about the pivotal attachment of the intermediate portion and separates the seedling holding roller from the feeding roller.

Further, the seedling holding arm is slidably contacted with the machine frame on the outer surface of the middle portion of the seedling holding arm, and the seedling holding arm is pivoted inward about the pivotal connection of the middle portion against the elastic force of the ammunition. , A seedling pressing guide having an outwardly bent portion for making the seedling pressing roller circumscribed to the feeding roller is formed at a starting end portion, and is arranged in an appropriate length in a reverse direction from a vertical position below the seedling pressing arm during rotation. . Further, on the outer surface of the disk on which the seedling holding arms are projected, the circumferential portion is equally divided into the number of seedling holding arms,
A ring-shaped cam, in which a concave portion and a convex portion continuously formed around each of them are circumferentially provided, is fixed concentrically by aligning the concave portion with the position of the seedling holding arm.

Further, a cam follower roller which pivotally connects the upper end portion to the machine frame, hangs a drive interrupting arm outward of the ring-shaped cam, and abuts the intermediate cam portion and the lower end portion on the ring-shaped cam, respectively. A seedling feeding drive roller (hereinafter, abbreviated as a drive roller) that rotates counterclockwise as viewed from the rear and circumscribes the feeding roller is provided. Further, the machine casing is provided with an ammunition for pressing the outer surface of the intermediate portion of the drive intermittent arm,
The drive roller is circumscribed and separated from the feeding roller through elastic contact between the concave and convex portions of the ring-shaped cam and the cam follower roller.

Further, according to the present invention, only the disk to which the seedling holding arm is attached may be provided. That is, a U-shaped bracket having a long side is projected on the peripheral surface of the disk on the side where the seedling holding arm is provided, with the closed portion facing outward.
Then, a seedling holding arm having an intermediate portion pivotally attached to the tip end portion of the U-shaped bracket is radially projected from the disc, and the tip end portion of the seedling holding arm is swung outward through an ammunition. The seedling holding roller is rotatably supported on the tip of the seedling holding arm so as to be circumscribed with the feeding roller. further,
It is preferable that the seedling pressing guide is attached to the machine frame so as to be twistable / fixable in a circumferential direction concentric with the rotation center of the seedling pressing arm in order to adjust the end position of sliding contact with the seedling pressing arm.

[0008]

In the seedling feeding and planting mechanism configured as described above, the seedling supplier is positioned rearward or forward in the rear of the mechanism. Then, when the seedling holding arm and seedling holding arm that are radially projected on the disk attached to the shaft that rotates forward and downward in the machine frame are located behind the mechanism, they rise from the bottom to the front of the seedling supplier. However, if it is located in the front, it descends in front of the plane. Before the seedling pressing arm is slidably contacted with the seedling pressing guide, the tip of the seedling pressing arm pivots outward through a bullet and the seedling pressing roller is separated from the feeding roller. When the seedling supplier positions the root of the seedling between the feeding roller and the seedling pressing roller which are separated from each other, and sandwiches the seedling in the seedling holding piece, the feeding roller axially supported according to the rotation direction of the disc is It is almost orthogonal to the root of the seedling. The seedling holding arm rotates with the disc while holding the seedling, and the seedling holding arm also rotates integrally with the seedling holding arm.

FIG. 10 is a schematic development view of essential parts for explaining the operation of the embodiment, and FIG. 1 shows a mode at the time of planting.
The operation of this mechanism will be described with reference to 1 and 12. With the above-mentioned rotation, the seedling pressing guides 10 and 11 arranged in an appropriate length in the reverse direction of the downward vertical position at the time of rotation of the seedling pressing guides 10 and 11 have outer bending portions 12 serving as guiding portions. The tip of the seedling pressing arm 7 is swung inward against the elastic force of the ammunition machine 9 by sliding contact with the outer middle portion, and the seedling pressing roller 8 at the tip is brought into external contact with the feeding roller 6 at the tip of the seedling holding arm. The seedling pressing guide 10 is for the case where the seedling supplier is located behind the mechanism as described above, and the seedling pressing guide 11 is for the case where it is positioned forward and backward.

Accordingly, the seedling feeding arm 4 and the seedling holding arm 7 sandwich the root portion of the seedling S between the rollers at the tips and rotate downward. Eventually, when the seedling holding arm 4 is rotated to the lower vertical position, the cam follower roller 18 of the drive connecting / disconnecting arm 17 provided outside the ring-shaped cam 13 causes the ammunition 3
It receives the elasticity of 1 and slides into the ring-shaped cam 13 to fall into the recess 14 (see FIGS. 10 and 11). Then, the lower end portion of the drive connecting / disconnecting arm 17 pivots inward about the pivot 29 of the upper end portion, and the drive roller 19 rotating counterclockwise in the rear view (reference A) is circumscribed to the feeding roller 6. (See the dashed line in FIG. 10).

While the concave portion 14 is in elastic contact with the cam follower roller 18 as the disc 2 rotates, the drive roller 19
Rotates the feeding roller 6 in the rearward clockwise direction (reference symbol B), and rotates the seedling pressing roller 8 circumscribing the feeding roller 6 with the seedling S interposed therebetween in the rearward counterclockwise direction (reference symbol C). Therefore, the feeding roller 6 and the seedling holding roller 8
Rotate downward with respect to each other, and the seedlings S sandwiched therebetween are fed downward from the root portion to the upper portion. The amount of seedlings delivered is
It is necessary to make the sum of the planting depth h1 and the above-ground clearance h2 at the lower end of the seedling S (see FIG. 11). This is the seedling feeding roller 6
And the number of revolutions of the ring-shaped cam 13 and the time during which the recess 14 of the ring-shaped cam 13 is in contact with the cam follower roller 18.

As the seedling holding arm 4 further rotates, the convex portion 15 of the ring-shaped cam 13 makes elastic contact with the cam follower roller 18. Then, the ring-shaped cam 13 displaces the cam follower roller 18 outward by the height c of the convex portion 15 (see FIG. 10), and the lower end portion of the drive interrupting arm 17 is connected to the lever via the pivot 29 of the upper end portion. The ratio is increased to a / b (refer to FIG. 11), and it is turned outward. Driving intermittent arm 17 that swivels outward
Separates the drive roller 19 from the feeding roller 6 (see FIG.
The rotation of the feeding roller 6 is stopped.

On the other hand, when the width y1 of the seedling pressing arm 7 passes through the terminal end portion 12a of the seedling pressing guide 10 at the lower vertical position (see FIG. 10), the elastic force of the ammunition machine 9 causes the lower end portion to momentarily move outward. The seedling pressing roller 8 is rotated, separated from the feeding roller 6, and the rotation of the seedling pressing roller 8 is stopped. The feeding roller 6 and the seedling pressing roller 8 insert the seedling S into the feeding ground by a depth h1 before the rotation is stopped. Then, the seedling pressing roller 8 is separated from the feeding roller 6 to separate from the seedling inserted upright into the ground, and the seedling holding arm 4 and the seedling pressing arm are again in front of the seedling supplier with the rotation of the disks 2 and 3. 7 is spinning. Regarding the feeding of seedlings, when the seedling pressing roller 8 is separated from the feeding roller 6, the seedling S is not sandwiched, so that the feeding of seedlings is stopped even if the feeding roller 6 is rotating. That is, the seedling feeding amount changes depending on the timing of separating the seedling pressing roller 8 from the feeding roller 6.

As shown in FIGS. 13 and 14, only the disc 2 is provided, and the seedling pressing arm 7A is pivoted at the middle portion into the tip end portion f of a U-shaped bracket 34 having a long side protruding from the outer peripheral surface of the disc 2. When the seedling-holding guide 10 is worn 28 and radially protrudes from the disc 2 and the tip is swung outward through the ammunition 9, the seedling-holding guide 10 slides on the outer surface of the intermediate portion of the seedling-holding arm 7A. Contact, and through the pivot 28, the tip of the seedling holding arm 7A,
The seedling pressing roller 8 is circulated outwardly, and the seedling pressing roller 8 is contacted with and separated from the feeding roller 6. In addition, the seedling pressing guides 10 and 11 mounted on the machine frame 1 so that they can be twisted and fixed concentrically with the center of rotation of the seedling pressing arms 7 and 7A, the seedling pressing arms 7 and 7A are vertically downward when rotating. This makes it possible to adjust the position at which the pressing guides 10, 11 have finished passing through the end portions 12a, that is, the timing at which the seedling pressing roller 8 is separated from the feeding roller 6.

[0015]

Embodiments Next, embodiments will be described with reference to the drawings. 1 and 2, the machine casing 1 has a rectangular shape (see FIG. 15). 2 and 3 are disks of the same diameter, and the boss 20
The central part is fixed to both end faces. Bearings 22 and 23 are fixedly mounted on the left and right side surfaces of the machine frame 1 to horizontally mount a shaft 24. Then, the shaft 24 is connected to the boss 20, the disks 2 and 3 and the stop collar 25, and is axially supported by the bearings 22 and 23.
The boss 20 is fixed to the center of the shaft with a stopper 21, the left and right movements of the shaft 24 are stopped with a collar 25, and the disks 2 and 3 are machine frame 1
Installed inside.

One end of the shaft 24 is projected to the outside of the machine frame 1, and a chain sprocket 26 is fixed to the projecting portion. The chain sprocket 26 is wound with a chain 27 that rotates by an appropriate power source, and the shaft 24 and the disks 2, 3
Is rotated forward and downward as indicated by reference numeral R. 6
Reference numeral 3 denotes a chain cover detachably attached to the outer surface of the machine frame 1. Reference symbol F in the drawing indicates the forward direction.

A seedling holding arm 4 is provided with a seedling holding piece 5 at an intermediate portion thereof, a feeding roller 6 is axially supported 39 at the tip end thereof in the rotational direction of the disc 2, and a base portion is fixed to the inner surface of the disc 2. , Equal-length and equally-spaced radial projections. The feeding roller 6 fixes the inverted U-shaped bracket 35 to the tip of the seedling holding arm 4 at the upper side in a T-shape when viewed from the side, and the shaft support 3 inside thereof.
In addition, as shown in FIG. 1, when the seedling S is supplied to the seedling sandwiching piece 5, the root of the seedling is provided so as to contact the inner peripheral surface.

The feeding roller 6 is a rubber roller which is soft and has good anti-repulsion elasticity in order to reduce slippage with the seedling and prevent damage to the seedling. Seedling sandwiching piece 5 is shown in Figs.
As shown in FIG. 2, two rectangular rubber plates are overlapped with each other, a part thereof is projected from the end surface of the seedling holding arm 4 on the rotation direction R side, and the studs 5a are attached to the middle portion of the outer surface of the seedling holding arm 4 in the rotation direction. R
The seedling S is inserted between two rubber plates opened in the direction of movement of and is sandwiched by the elasticity of the rubber.

Reference numeral 7 denotes a seedling pressing arm, which has an intermediate U pivotally attached to the inside of two brackets 9a protruding from the outer peripheral surface of the disk 3 and has an inverted U shape fixed to the tip in a T-shape in a side view. The seedling pressing roller 8 is axially supported 40 inside the shaped bracket 36, and the same number as the seedling holding arm 4 is radially projected from the disk 3.
The seedling pressing roller 8 is circumscribed on the feeding roller 6. Further, the upper end of the seedling holding arm 7 is pressed by the ammunition machine 9, the tip of the seedling holding arm 7 is swung outward around the pivot 28, and the seedling holding roller 8 is separated from the feeding roller 6. Has become.

In the embodiment, the seedling pressing arm 7 and the seedling holding arm 4 are overlapped with each other in a side view, but some deviation may occur. Further, as described above, the seedling pressing roller 8 presses the seedling while being driven to rotate when it is in contact with the feeding roller 6, so that it does not need to have the same diameter as the feeding roller 6. The seedling pressing roller 8 is also the same rubber roller as the feeding roller 6. FIG. 6 shows another embodiment of the seedling pressing roller 8,
In order to prevent the seedlings from being damaged, sponge rubber 43 is attached to the outer circumference of the rubber roller. In the figure, 36 is an inverted U-shaped bracket, 38 is a bearing, and 45 is a retaining ring for stopping the lateral movement of the shaft support 40. The feeding roller 6
The shaft support structure of the drive roller 19, which will be described later, is the same as that of the seedling pressing roller 8.

A projecting piece 7a is provided on the upper end portion of the seedling pressing arm 7 (see FIG. 1). When the tip of the projecting piece 7a abuts on the disk 3, the projecting piece 7a moves outward from the tip of the seedling pressing arm. This limits the turning amount of. That is, the outer side surface of the intermediate portion of the seedling pressing arm 7 is provided so as to be brought into sliding contact with the inner side surface of the outwardly bent portion 12 at the starting end portions of the seedling pressing guides 10 and 11, which will be described later, as it rotates. The ammunition machine 9 is a compression spring, and is fitted in a cylindrical socket 9b fixed to a bracket 9a, and the elastic force is adjusted by a screw plug 9c screwed to the cylindrical socket 9b from the outside. Although not shown, the ammunition 9 is provided below the bracket 9a,
You may make it press the inner surface of the seedling holding arm 7 and make the front-end | tip part of the seedling holding arm 7 turn outward.

Reference numeral 10 denotes a seedling pressing guide, which is arranged on the machine frame 1 in an appropriate length in the reverse direction from the vertical position below the seedling holding arm 4 during rotation. The seedling holding guide 10 is for the case where the seedling supplier is positioned rearward of this mechanism and facing forward. The seedling holding guide 11 of FIG. 5 is also used when the seedling supplier is positioned rearward in front of this mechanism. In the seedling pressing guide 10, the above-mentioned appropriate length is from before the upper upright position to immediately before the lower vertical position when the seedling holding arm 4 rotates. Similarly, in the seedling pressing guide 11, it is from the lower vertical position to the substantially horizontal position in the direction opposite to the rotation direction R. Then, during the above period, the seedling pressing arm 7 is slid in contact with the outer surface of the intermediate portion of the seedling pressing arm 7 against the elasticity of the ammunition machine 9, the seedling pressing arm 7 is swung inward, and the seedling pressing roller 8 is circumscribed to the feeding roller 6. Further, it is attached to the projecting portion 1a inside the machine frame 1 via a screw rod / nut 47.

Further, in the seedling pressing guides 10 and 11, the starting end portion is an outer bent portion 12 serving as a guiding portion when the outer surface of the intermediate portion of the seedling pressing arm 7 starts sliding contact as described above, and the terminal end portion 1 is formed.
When the seedling holding arm 4 is in the downward vertical position when the 2a is rotated, the seedling holding arm 7 passes through. Reference numeral 48 is a long through hole (see FIG. 2), and the seedling holding guide 10 is provided so that it can be twisted and fixed freely in the circumferential direction concentric with the rotation center of the seedling holding arm 7 via the screw rod / nut 47. In the case of the seedling pressing guide 11, the seedling supplier supplies seedlings to the descending seedling holding arm 4, so the seedling holding piece 5 is attached so as to open in the rotation direction R (see FIG. 5). .

Reference numeral 13 is a ring-shaped cam, and as shown in FIGS. 7 to 9, the circumferential portion is equally divided into the number of seedling holding arms 4, and a concave portion 14 and a convex portion 15 are connected to each of them. However, it is continuously provided along the entire circumference. Then, the concave portion 14 is aligned with the position of the seedling holding arm 4 and is concentrically fixed to the outer surface of the disc 2 by a disc screw nut 46 (FIG. 3).
reference). Reference numeral 16 denotes an inclined surface portion formed between the concave portion 14 and the convex portion 15. Although not essential, the ring-shaped cam 13 is smoothly rotated from the concave portion 14 to the convex portion 15 with respect to the cam follower roller 18 described below. It is a thing.

In FIGS. 1 and 3, reference numeral 1b is a protruding portion provided inside the machine frame 1 so as to face the center line of the disk 2 in the vertical direction. Reference numeral 17 denotes a drive connecting / disconnecting arm, which is pivotally attached to the machine frame 1 via a bracket 30 whose upper end is fixed to the projecting portion 1b.
Then, the driving roller 19 hangs outward of the ring-shaped cam 13, and the driving roller 19 is rotatably supported by the feeding roller 6 and the inside of the inverted U-shaped bracket 37 fixed to the lower end thereof. A cam follower roller 18 is provided in contact therewith.

The cam follower roller 18 rotates within the U-shaped bracket 44 about the vertical axis. Drive roller 19
The flexible shaft 42 has one end connected to an appropriate power source and the other end connected to the shaft support 41 of the drive roller 119 so as to rotate counterclockwise as viewed from the rear. Further, the projecting portion 1b of the machine frame 1 is provided with a bullet 31 for pressing the outer surface of the intermediate portion of the drive interrupting arm 17, and the cam follower roller 18 is connected to the ring-shaped cam 1.
I am in contact with 3. While the concave portion 14 of the ring-shaped cam 13 is in elastic contact with the cam follower roller 18 as the disk 2 rotates, the drive roller 19 makes external contact with the feeding roller 6 and passes through the concave portion 14 and has a height c. When the cam 15 comes into elastic contact with the cam follower roller 18, the feeding roller 6 moves to the drive roller 19
Are separated. The dashed line and the broken line in FIG. 10 schematically show the state in which the drive roller 19 is circumscribed and separated from the delivery roller 6, respectively.

In the embodiment, the feeding roller 6 and the driving roller 1
9 and seedling holding roller 8 have an outer diameter of 3 cm and a width of 4.8 c
m. The diameter of the cam follower roller 18 is 1.5.
The center diameter D1 of the ring-shaped cam 13 that contacts the cam follower roller 18 is 18 cm. The drive roller 19 has a rotation speed of 240 rpm, and the seedling holding arm 4 and the seedling pushing arm 7 each have a number n of 6 and a rotation speed Nrpm of 6 rp.
m, the diameter around the center of the shaft of the feeding roller 6 is 50c
m.

Therefore, the revolving speed v of the feeding roller 6
Is πD · N / 60, so in the embodiment, v is π · 50 ·
It is 15.7 cm / s at 6/60. Further, the time t during which the drive roller 19 comes into contact with the delivery roller 6 (which is the delivery time) is t = w / when the delivery roller width is wcm.
v. Therefore, t is w 4.8 cm and v is 1
From 5.7 cm / s, it is about 0.3 seconds. On the other hand, the driving roller 19 has a rotation speed n1 of 240 rpm, and the payout roller 6 has the same diameter as the driving roller 19, so that the same 240r
Rotate at pm. Therefore, when t is 0.3 seconds,
The delivery roller 6 rotates 0.3 × 240/60 = 1.2 rotations. Since the outer diameter d1 of the feeding roller is set to 3 cm, the feeding amount is πd1 × 1.2 rotation in the above 1.2 rotations,
It is 11.3 cm. This feeding amount can correspond to a planting depth h1 of 7 cm and a ground clearance h2 of 4 cm, which is 11 cm in total, as described above.

Next, the ring-shaped cam 13 has a center diameter D1 at which the cam follower roller 18 is elastically contacted with 18 cm and a rotational speed N of 6
Since it is rpm, the peripheral speed at D1 is πD1
-At N / 60, it is about 5.7 cm / s. Since the seedling feeding time is 0.3 seconds as described above, 0.3 × 5.7 = 1.7 cm is required so that the concave portion 14 of the ring-shaped cam 13 makes elastic contact with the cam follower roller 18 only for this time. Is. This 1.7 cm is the actual operating circumference e by which the cam follower roller 18 rolls in the recess 14, as shown in FIG.
This is obtained by subtracting the radius of the cam follower roller 18 of 0.75 cm from the peripheral length CL1 of the recess 14. Therefore, the peripheral length CL1 of the recess 14 is 1.7 cm + 0.75 cm = 2.
It is 45 cm.

Further, the ring-shaped cam 13 is the seedling holding arm 4
Since the circumference is equally divided into the number of, the circumference of one division is
It is 9.4 cm, which is πD1 / 6. Perimeter CL2 of the convex portion 15
(See FIG. 10) is from 9.4 cm to the circumference of the recess 14 2.
It is 6.95 cm after subtracting 45 cm. The height c of the convex portion 15 is 3 mm, and the slope portion 16 has a slope length of about 1 cm.
Is. Further, the drive interrupting arm 17 in FIG. 11 has a of 18.8 cm and b of 3 cm. When the cam follower roller 18 is displaced outwardly by 3 mm of the height c of the convex portion 15, the drive roller 19 is separated from the feeding roller 6 by 18.8 mm by the lever ratio a / b = 6.26.

13 and 14 show an embodiment in which only the disc 2 is provided and a seedling holding arm is provided. That is, a U-shaped bracket 34 having a long side is provided on the peripheral surface of the disk 2 on the side where the seedling holding arm 4 is provided, with the closed portion f facing outward.
Then, the seedling holding arm 7 is provided in the tip portion of the U-shaped bracket 34.
A is pivotally attached to the middle part 28 to project radially from the disk 2,
A seedling pressing roller 8 is rotatably supported on the tip end of the seedling feeding roller 6 by being circumscribed. Furthermore, the upper end of the seedling holding arm 7A is pressed by the ammunition machine 9 and the tip is swung outward. Reference numeral 7b denotes a protrusion, which is fixed to the inside of the closed portion of the U-shaped bracket 34, and is attached to the inner surface of the upper end portion of the seedling pressing arm 7A in order to make the outer surface of the seedling pressing arm 7A slidably contact the inside of the seedling pressing guide 10. It is provided so as to abut and limit the outward turning amount of the tip of the seedling holding arm 7A. The ammunition machine 9 is housed in the cylindrical socket 9b like the seedling holding arm 7 described above,
The elasticity is adjusted by the screw plug 9c.

Next, FIGS. 15 and 16 are schematic views of an example in which the mechanism of the present invention is applied to a seedling planting machine. In these figures, the seedling planting machine forms the machine frame 1 into a substantially rectangular frame and
It is horizontally supported by a front wheel 50 and a rear wheel 51 mounted so as to straddle. At the rear of the machine casing 1, an engine 52 and a transmission 53 driven by this engine are attached,
Shaft cylinders 54 and 55 are provided on the left and right sides of the transmission 53, and a drive shaft (not shown) rotated by the transmission 53 is rotatably supported therein. In the figure, 49 is a seedling mount, and 64 is a sheet for a seedling supplier.

Further, a hollow arm body 56 is fixed to the projecting ends of the shaft cylinders 54 and 55 so as to be directed obliquely forward, and a chain transmission mechanism 57 which rotates on the drive shaft is housed therein, and a rear axle 58.
Are driving. The rear wheel 51 is a transmission 53
A shift lever 59 provided at the front is used to move forward, reverse, and shift. Reference numeral 61 is a sub-transmission provided in an intermediate portion of the shaft cylinder 55, in which a chain sprocket 62 that receives rotation from a drive shaft (not shown) is housed. A clutch lever 60 is provided on the transmission 53 so as to intermittently rotate the chain sprocket 62.

The chain 27 is wound around the chain sprocket 62 and the chain sprocket 26 described above, and this mechanism is operated by using the engine 53 as a power source. An output shaft (not shown) is projected forward from the transmission 53, one end of the flexible shaft 42 is connected to the output shaft, and the other end is connected to the shaft support of the drive roller 19 to connect the drive roller 19 to the drive roller 19. The rear view rotates counterclockwise.

By the way, when the planting pitch of the seedlings is pcm, the planting distance L per minute is pn, and the theoretical forward speed Vcm / s is L / 60. Therefore, when the planting pitch p = 30 cm, the seedling planting machine using this mechanism was moved forward at a speed V = 30 × 6 × 6/60 = 18 cm / s. At this time, the seedling supply interval T seconds is T = 60 / n
・ Because it is N, T was 1.67 seconds and seedlings could be supplied.

Further, as described above, the winding diameter D of the feeding roller 6 is 50 cm. Therefore, the orbital speed v of the feeding roller 6 is πD · N / 60, and N is 6 rpm.
Then, v is 15.7 cm / s. Since this v is the forward downward rotation speed, the forward speed 18 cm /
The opposite of s. That is, the ground speed of the feeding roller 6 is 2.3 cm / s (forward direction) of Vv. While the seedlings were tilted forward by the above-mentioned forward speed during feeding, the seedling feeding time was as short as 0.3 seconds as described above, so there was no problem in planting the seedlings almost upright.

[0037]

EFFECTS OF THE INVENTION Since the present invention is configured as described above, it has the effects described below.

Inside the machine frame, seedling-holding arms projecting from a disk that rotates forward and downward in a radial pattern of equal length and at equal intervals, and seedling-holding pieces and feeding rollers are provided at the middle and tip ends of the seedling-holding arm, respectively. Thus, the seedlings can be sandwiched between the seedling sandwiching pieces, the roots of the seedlings can be brought into contact with the inner peripheral surface of the feeding roller, and the seedlings can be conveyed downward at equal intervals. The seedling holding arm that rotates forward and downward together with the seedling holding arm is provided with a seedling holding roller at the tip, and the middle part is pivotally attached to the peripheral edge of the disk to project radially, and the upper end is struck. The seedling holding arm is pushed by the machine so that it can swivel outward, and when it rotates, the seedling holding arm slides against the outer surface of the seedling holding arm for a proper length in the reverse direction from the lower vertical position of the seedling holding arm to resist the resilience of the seedling machine. By providing a seedling pressing guide that makes the pressing roller circumscribe the seedling feeding roller, the root of the seedling sandwiched between the seedling holding pieces can be sandwiched by the seedling pressing roller with respect to the feeding roller and conveyed downward. Further, when the seedling holding arm passes the end of the seedling holding guide, the seedling holding roller can be automatically and instantaneously separated from the feeding roller by the elasticity of the ammunition to open the seedling.

Further, a ring-shaped cam, in which the concave portion and the convex portion are connected to each other and continuously provided around the concave portion, is concentrically fixed to the outer surface of the disk provided with the seedling holding arms in a concentric manner in accordance with the position of the seedling holding arms. However, the rear view of the cam follower roller and the payout roller contacting the ring-shaped cam is circumscribed at the middle and lower ends of the drive intermittent arm that pivotally connects the upper end to the machine frame and hangs outward of the ring-shaped cam, respectively. A drive roller that rotates counterclockwise is provided, and the cam follower roller is elastically contacted with the ring-shaped cam by pressing the outer surface of the intermediate part of the drive interrupting arm with an ammunition machine. When the concave portion and the convex portion of the cam make elastic contact with the cam follower roller, respectively, the drive roller can come into contact with and separate from the payout roller.

Therefore, when the seedling holding arm reaches the downward vertical direction by the rotation, the drive roller circumscribes the feeding roller and rotates it clockwise, and at the same time, the seedling pressing roller is rotated counterclockwise as viewed from the rear, and the feeding roller is rotated. The seedlings whose roots are sandwiched between the seedling holding rollers can be vertically fed from the lower part to the upper part and inserted into the ground. Also, by rotating the seedling holding arm forward and downward, when used in a seedling planting machine, the feeding roller orbits at a speed opposite to the forward speed, so the ground speed of the feeding roller is reduced,
You can plant seedlings upright. Then, by feeding out the seedlings and inserting them into the ground, it is possible to easily plant the sweet potato seedlings, which had been difficult to plant by machine because of relatively deep planting.

When the rotation of the disk advances and the convex portion of the ring-shaped cam makes elastic contact with the cam follower roller, the rotation of the feeding roller is stopped by moving the driving roller at the lower end of the driving interrupting arm away from the feeding roller. be able to.
At this time, the seedling holding arm also passes through the end of the seedling holding guide, and the seedling holding roller at the tip is momentarily separated from the feeding roller by a bullet, so that the seedling holding arm is fed from the seedling inserted into the ground. The roller can be separated from the seedling retainer roller to release the seedling and finish planting.

Further, by arranging the seedling pressing guide from the lower vertical position when the seedling pressing arm is rotated to the upper vertical position in the reverse direction, the seedling supplier is positioned rearward of the present mechanism in the forward direction to supply the seedlings. Similarly, by arranging the seedlings in the horizontal position in the reverse direction from the lower vertical position, the seedling supplier can be placed in front of the mechanism and facing backward to supply seedlings. . Therefore, when used in a seedling planting machine, it can be widely applied.

Further, using only the disc on the side where the seedling holding arm is provided, a U-shaped bracket having a long side is projected on the peripheral surface with the closing portion facing outward, and the middle portion of the seedling holding arm is provided in the tip portion thereof. It is possible to reduce the number of disks by pivoting and radially projecting from the disks. Also, twist the seedling holding guide in a circumferential direction concentric with the center of rotation of the seedling holding arm.
By fixing the seedling holding arm, it is possible to adjust the timing when the seedling holding arm passes the end of the seedling holding guide, change the seedling feeding amount, and adjust the planting depth.

As described above, this mechanism automatically feeds and stops the seedlings supplied to the seedling holding arm that circulates in front of the face. Therefore, if this mechanism is advanced at a predetermined speed by an appropriate means and the seedlings are fed to the seedling holding arm that rotates in front of the next surface, the seedling planting machine can sequentially and almost vertically plant deep seedlings. Can be obtained.

[0045]

[Brief description of drawings]

FIG. 1 is an enlarged vertical cross-sectional view of a main part of a mechanism of the present invention with part of the view taken along the line BB-B in FIG.

FIG. 2 is a right side view in which a main part of the mechanism of the present invention is partially broken.

FIG. 3 is a left side view of a main part of the mechanism of the present invention.

FIG. 4 is an enlarged end view taken along the line AA of FIG. 1A.

FIG. 5 is a right side view of a partially broken main part showing another embodiment of the seedling pressing guide.

FIG. 6 is a vertical cross-sectional view of the center of the seedling holding roller in the axial support direction.

FIG. 7 is a left side view of a disk to which a ring-shaped cam is attached.

FIG. 8 is a sectional development view taken along the line C-C in FIG.

FIG. 9 is an end view taken along the line DD of FIG. 7;

FIG. 10 is a schematic developed view of a main part for explaining an operation.

FIG. 11 is a rear view of the lower half of the main part showing a state before planting.

FIG. 12 is a rear view of the lower half of the main part showing a state after planting.

FIG. 13 is a rear view of the lower half of the main part showing another embodiment.

FIG. 14 is a cross-sectional view taken along the line EE of FIG.

FIG. 15 is a plan view of a seedling planting machine showing an application example of the mechanism of the present invention.

16 is a left side view of FIG.

[Explanation of symbols]

 1 machine frame 2,3 disk 4 seedling holding arm 5 seedling holding piece 6 seedling feeding roller 7,7A seedling holding arm 8 seedling holding roller 9,31 ammunition machine 10,11 seedling holding guide 12 outward bending part 13 ring-shaped cam 14 concave portion 15 convex portion 17 drive intermittent arm 18 cam follower roller 19 seedling feeding drive roller 24 shaft 26 chain sprocket 27 chain 28, 29 pivot 34 34 one piece long U-shaped bracket

Claims (3)

[Claims] 1. A disk (2, 3) having a central portion fixedly attached to a shaft horizontally rotatably in a forward and downward direction in a machine frame (1), and a seedling holding piece (5) provided in an intermediate portion, and a tip portion. And a seedling holding arm (4) which is axially supported by a seedling feeding roller (6) that follows the rotation direction of the disk and projects radially from the disk (2) with equal length and at equal intervals, and the outside of the disk (3). The intermediate part is pivotally attached to the peripheral part, the seedling feeding roller (8) is rotatably supported on the tip part and the seedling pressing roller (8) is circumscribing, and the seedling pressing arm (7) radially protruding from the disc and the intermediate part are provided. (9) that pivots the tip of the seedling holding arm outwardly about the pivotal attachment of the seedling holding arm and separates the seedling holding roller from the seedling feeding roller, and the vertical position below the seedling holding arm 4 during rotation. To a suitable length in the reverse rotation direction from above, and slide against the outer surface of the intermediate part of the seedling holding arm to resist the elastic force of the ammunition machine. A seedling-holding guide having an outwardly bent portion (12) formed at the starting end for pivoting the seedling-holding arm inwardly about the pivotal connection of the intermediate portion and circumscribing the seedling-holding roller to the seedling feeding roller ( 10 and 11) and the circumferential portion is equally divided into the number of seedling-holding arms, and a concave portion (14) and a convex portion (15) formed in a concatenated manner are continuously provided around each of them.
A ring-shaped cam (1) concentrically fixed to the outer surface of the disk (2) by aligning the recess with the position of the seedling holding arm.
3) and a cam follower roller (1) which has an upper end pivotally attached to the machine frame, hangs outward of the ring-shaped cam, and abuts on the ring-shaped cam at an intermediate portion and a lower end, respectively.
8) and a drive interrupting arm (17) provided with a seedling feeding drive roller (19) which rotates counterclockwise from the rear and circumscribes the seedling feeding roller, and an outer surface of an intermediate portion of the drive interrupting arm provided in the machine frame. And a bullet (31) that presses the seedling feeding drive roller through elastic contact between the cam follower roller and the concave and convex portions of the ring-shaped cam. A mechanism for feeding and planting seedlings. 2. A U-shaped bracket (34) having a long side is provided on the peripheral surface on the side where only the disk (2) is provided and on which the seedling holding arm (4) is provided, with the closing part (f) facing outward. The seedling holding arm (7A) is radiated from the disk by pivotally attaching the middle portion inside the tip portion of the U-shaped bracket, and the tip portion of the seedling holding arm is inserted through the ammunition machine (9). The seedling feeding and planting mechanism according to claim 1, wherein the seedling holding roller (8) is pivoted outwardly, and the seedling holding roller (8) is pivotally supported on the tip of the seedling holding arm (7A) externally to the seedling feeding roller (6). . 3. A seedling retainer guide (10, 11) is attached to the machine frame (1) so as to be twistable / fixable in a circumferential direction concentric with the rotation center of the seedling retainer arm (7, 7A)). The seedling feeding mechanism according to 1 or 2.