JP3055101B2 - Seedling vertical feeding structure of seedling planting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seedling vertical feeding structure of a seedling planting apparatus configured to vertically feed a seedling placed on a seedling rest to a lower side of the seedling rest.

[0002]

2. Description of the Related Art As a vertical seedling feeding structure of a seedling planting apparatus,
For example, as disclosed in Japanese Utility Model Laid-Open Publication No. 3-92917, a seedling feed belt having a predetermined width is arranged on a seedling nest in the vertical feed direction, and the seedling feed belt is rotationally driven in the vertical feed direction. In some cases, the seedling feed belt comes into contact with the bottom surface of the seedling placed on the seedling rest, and the seedling is fed vertically to the lower side of the seedling rest. Thereby, the planting mechanism takes out the seedlings from the lower part of the seedling mounting table and plant them on the rice field.

[0003]

The seedling feed belt is driven to rotate while being wound around a drive roller and a driven roller. A portion of the seedling feed belt that contacts the seedling is located between the drive roller and the driven roller. Since the weight of the seedlings tends to bend downward, it is necessary to support the portion of the seedling feed belt that contacts the seedlings. SUMMARY OF THE INVENTION It is an object of the present invention to provide a seedling vertical feeding structure of a seedling planting device that can appropriately support a portion of a seedling feeding belt that contacts a seedling.

[0004]

A feature of the present invention resides in the following structure in a vertical seedling feeding structure of a seedling planting apparatus. Equipped with a seedling rest on which seedlings are placed, and a planting mechanism for taking out seedlings from the lower part of the seedling rest and planting them on the rice field, placing a seedling feed belt having a predetermined width on the seedling rest along the vertical feeding direction. By rotating the seedling feed belt in the longitudinal feed direction, the seedling feed belt comes into contact with the bottom surface of the seedling, and the seedling is vertically fed to the lower side of the seedling nest. A plurality of ridges are provided along the longitudinal feed direction to support a portion of the seedling feed belt that contacts the seedling by contacting the back surface of the portion that contacts the seedling, and a drive formed on the back surface of the seedling feed belt. The rack unit is configured to be located between the ridges corresponding to the right side and the left side of the seedling feeding belt, and includes a guide unit that receives the driving rack unit.

[0005]

According to the first aspect of the present invention, the portion of the seedling feed belt that contacts the seedling is supported from the rear side by the ridge, so that the portion of the seedling feed belt that comes into contact with the seedling is lowered by the weight of the seedling. Is prevented from being bent. This prevents a state in which the portion of the seedling feed belt that comes into contact with the seedlings bends downward together with the seedlings, thereby hindering the vertical feeding of the seedlings by the seedling feed belt.

According to the first aspect of the present invention, the ridge contacting the rear surface of the portion of the seedling feed belt which comes into contact with the seedling is relatively narrow and is disposed along the longitudinal feed direction. When is rotated in the longitudinal feed direction, the contact area of the ridge with the seedling feed belt is small, and the ridge is in the rotation direction (moving direction) of the seedling feed belt. Thus, the seedling feed belt can be smoothly rotated without receiving a large resistance from the ridge.

[II] The seedling feed belt is generally wound around a drive roller and a driven roller and placed on a seedling nest, and a drive rack portion formed on the back surface of the seedling feed belt is engaged with the drive roller. As the drive roller is driven to rotate, the seedling feed belt is driven to rotate. According to the first aspect of the present invention, since the guide portion for receiving the driving rack portion formed on the rear surface of the seedling feed belt is provided, the portion of the seedling feed belt that comes into contact with the seedling by the heavy seedling is reduced by the weight of the seedling. If the projecting ridges cannot sufficiently prevent downward bending, the drive rack portion of the seedling feed belt is received by the guide portion, and the seedling feed belt is also fed by the drive rack portion. The portion of the belt that contacts the seedling is supported.

In this case, the driving racks formed on the back of the seedling feed belt are formed on the back of the seedling feed belt so as to be arranged at predetermined intervals. The contact area with the guide does not become large. Thus, the seedling feeding belt is smoothly rotated and driven without the driving rack portion of the seedling feeding belt receiving great resistance from the guide portion.

[III] According to the first aspect of the present invention, the driving rack portion formed on the back surface of the seedling feeding belt is disposed between the ridges corresponding to the right and left portions of the seedling feeding belt. Therefore, even if the roots and mud of the seedling placed on the seedling nest try to enter the middle from the side edge of the portion of the seedling feed belt that comes into contact with the seedlings, they correspond to the right and left sides of the seedling feed belt. Stopped by the ridges, the roots and mud of the seedlings described above are prevented from adhering to the driving rack portion of the seedling feed belt. As a result, the roots and mud of the seedlings adhere to the driving rack portion of the seedling feed belt, and the engagement with the drive roller described in the above item [II] is not performed properly, and the seedling feed belt is not rotated properly. The condition is prevented.

[0010]

According to the first aspect of the present invention, in the seedling vertical feeding structure of the seedling planting apparatus, the portion of the seedling feeding belt that contacts the seedling is configured to be supported from the rear side by the ridge, so that the seedling is provided. The state in which the portion of the feed belt that contacts the seedling is prevented from bending downward due to the weight of the seedling is prevented, and the state that hinders the vertical feeding of the seedling by the seedling feed belt is prevented beforehand. Thus, the seedlings can be smoothly taken out from the lower part of the seedling rest and planted on the rice field by the planting mechanism, and the planting performance of the seedling planting apparatus can be improved.

According to the first aspect of the present invention, the ridge contacting the rear surface of the portion of the seedling feed belt that contacts the seedling is relatively narrow and is disposed along the longitudinal feed direction, and a large resistance is provided from the ridge. Without receiving the seedlings, the seedling feed belt is smoothly rotated and the seedlings are longitudinally fed, so that the seedlings can be taken out from the lower part of the seedling pedestal by the planting mechanism and planted on the rice field smoothly. Thus, the planting performance of the seedling planting apparatus could be improved.

According to the first aspect of the present invention, a guide portion for receiving a driving rack portion formed on the back surface of the seedling feed belt is provided, so that a portion of the seedling feed belt which comes into contact with the seedling, particularly in the case of a heavy seedling, is a seedling. The state of trying to deflect downward due to the weight of the seedlings is prevented by the ridges and the drive rack portion of the seedling feed belt, and the state that hinders the vertical feeding of seedlings by the seedling feed belt is prevented beforehand. Thus, the planting performance of the seedling planting apparatus could be further improved. In this case, the drive racks formed on the back of the seedling feed belt are formed on the back of the seedling feed belt so as to be arranged at a predetermined interval, and the guides of the drive rack on the seedling feed belt are guided to the guides. Since the contact area does not become large, the seedling feed belt does not receive a large resistance from the guide portion, and the seedling feed belt is smoothly driven to rotate so that the seedlings can be vertically fed. The planting performance of the planting device could be further improved.

According to the first aspect of the present invention, a drive rack formed on the back of the seedling feed belt is disposed between the ridges corresponding to the right and left portions of the seedling feed belt. Since the roots and mud of the seedlings placed on the mounting table are prevented from adhering to the drive rack of the seedling feed belt, the roots and mud of the seedlings adhere to the drive rack of the seedling feed belt. The rotation drive failure of the seedling feed belt can be prevented beforehand, and the seedling feed belt is smoothly rotated and driven to vertically feed the seedlings.

[0014]

FIG. 5 shows a side view of a seedling planting apparatus connected to a rear part of a body of a riding type rice transplanter. The seedling planting device is supported by a machine body on the left side outside the figure via a hydraulically driven link mechanism (not shown) so as to be able to move up and down. Seedling stand 2 on which seedlings N can be placed and traversed laterally with a constant stroke, seedlings N can be taken out from the lower part of seedling stand 2 and a plurality of rows of rotary planting mechanism 3 can be planted on the rice field. Each time the table 2 reaches the stroke end of the horizontal feed, it is provided with a seedling vertical feed mechanism 4 for vertically feeding the seedlings N downward, a float 5 for leveling the rice field, and the like.

As shown in FIG. 5 and FIG.
Is constructed by arranging a pair of left and right wide seedling feeding belts 6 on the lower half of the seedling rest 2 for each strip, and the seedling feeding belt 6 includes a lower driving roller 7 and an upper tension roller 8.
It is wound over. As shown in FIGS. 1, 2, and 3, the seedling feeding belt 6 has a small protrusion 6a for transporting the seedling N on the outer peripheral surface, and a driving roller 7 which is engaged with the driving roller 7 at the left and right intermediate portion on the inner peripheral rear surface. It is formed of a wide rubber belt having a rack 6b. The tension roller 8 is urged upward by a spring 9 to tension the seedling feed belt 6 with a predetermined tension.

The distance between the drive roller 7 and the tension roller 8, in other words, the length of the seedling feed belt 6, is longer than that of a seedling feed belt provided in a seedling planting apparatus for planting a general mat-shaped seedling. ing. Figures 1, 2, 3
In order to prevent the seedling feed belt 6 from bending due to the weight of the seedling N as shown in FIG. And the tension roller 8, and is connected and fixed to the seedling rest 3.

The belt supporting member 10 is formed by bending a metal plate and having substantially the same width as the seedling feeding belt 6. A plurality of belt supporting members 10 supporting the back surface S of the seedling feeding belt 6 are provided near the left and right ends of the belt supporting member 10. A ridge 10a protrudes along the longitudinal feed direction, and a guide surface 10b that receives the tip of the drive rack 6b of the seedling feed belt 6 is formed between the ridges 10a.

Connecting rods 1 penetrating the left and right side plates 10c of the belt supporting member 10 at two positions above and below the belt supporting member 10.
1, a connecting rod 11 is supported by a lower bracket 12 and an upper bracket 13 of the seedling rest 2, and a belt supporting member 10 is connected and fixed to the back of the seedling rest 2. By using a mold that has been brushed at the time of molding the seedling feed belt 6, fine irregularities are formed on the back surface S of the seedling feed belt 6, and the protruding ridges 10a are kept in contact with the back surface S of the seedling feed belt 6 for a long time. Consideration is made so that the ridges 10a do not stick to the back surface S of the seedling feeding belt 6 even if it is stopped for a time.

FIG. 4 and FIG. 1 show the rotational drive structure of the drive roller 7 in the seedling vertical feed mechanism 4. As shown in FIGS. 4 and 1, the drive cam 1 supported on the left and right side surfaces of the planting transmission case 1 and rotating counterclockwise in FIG.
4. A transverse feed shaft 15 which is supported by the planting mission case 2 and which is laterally moved horizontally by a constant stroke, and a connecting arm 1 which connects both ends of the transverse feed shaft 15 and the seedling rest 2.
6. A vertical feed shaft 17 rotatably supported by the connecting arm 16 and urged in a counterclockwise direction on the paper surface, a vertical feed arm 18 fixed to the vertical feed shaft 17, a vertical feed arm fixed to the vertical feed shaft 17 A contact arm 19 that rotates integrally with the arm 18 and a stopper pin 20 that receives the contact arm 19 and regulates the standby position of the vertical feed arm 18 are provided.

As a result, when the transverse feed shaft 15 reaches the stroke end of one transverse feed, the one vertical feed arm 18 enters the rotation trajectory of the one drive cam 14 and is brought into contact with the drive cam 14. The vertical feed arm 18 is rotated clockwise by a predetermined angle on the paper, and the rotation of the vertical feed arm 18 is transmitted to the drive shaft 21 of the drive roller 7 via the chain transmission mechanism 22 and the one-way rotating clutch 23 in the clockwise direction on the paper. The rotation is transmitted as a rotation, and the seedling feeding belt 6 is driven to rotate by a predetermined amount, so that the seedlings N are vertically fed. Next, when the vertical feed arm 18 separates from the drive cam 14, the vertical feed arm 18 rotates together with the contact arm 19 in a counterclockwise direction on the paper by the biasing force given in advance, and the contact arm 19 is moved to the stopper pin 20. And the original standby position is reached. When the horizontal feed shaft 15 reaches the stroke end of the other horizontal feed, the other vertical feed arm 18 and the other drive cam 14 operate in the same manner as described above to perform the vertical feed of the seedling N.

As shown in FIG. 4, the seedling rest 2 can be adjusted in the vertical feeding direction together with a slide rail 24 supporting the lower part. For example, if the position of the seedling rest 2 is changed downward, the amount of seedlings collected by the planting mechanism 3 increases,
When the position of the seedling rest 2 is changed downward, the support arm 25 rotates clockwise about the fulcrum shaft 26, and the position of the stopper pin 20 is changed to the upper right in FIG. As a result, the standby position of the vertical feed arm 18 moves in the counterclockwise direction on the paper surface, and the angle while the drive cam 14 is in contact with the vertical feed arm 18 increases, and the vertical feed amount of the seedling N increases. Conversely, if the position of the seedling rest 2 is changed upward, the amount of seedlings collected by the planting mechanism 3 is reduced. As the position of the seedling rest 2 is changed upward, the support arm 25 is pivoted about the fulcrum shaft. The stopper pin 20 is rotated counterclockwise on the drawing sheet around 26, and the position of the stopper pin 20 is changed to the lower left of the drawing sheet of FIG. Thereby, the vertical feed arm 1
8 moves in the clockwise direction on the paper, and the drive cam 14 moves.
The angle of the seedlings N while it is in contact with the vertical feed arm 18 is reduced, and the vertical feed amount of the seedling N is reduced.

In this case, when the seedling rest 2 is at the center position in the vertical feeding direction (the center position of the adjustment range of the amount of seedling picking), the contact position a between the contact arm 19 and the stopper pin 20 is set to the vertical feeding position. The reference position of the support arm 25 is set so as to be at or very near a line L connecting the axis of the shaft 17 and the axis of the fulcrum shaft 26. By setting in this way, the position of the seedling placing table 2 (the amount of seedling picking) and the angle (the amount of vertical feeding of the seedling N) while the drive cam 14 is in contact with the vertical feeding arm 18 can be set as follows.
They can be almost the same.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is a side view showing the vicinity of a vertical seedling feeding mechanism in a seedling mounting table.

FIG. 2 is a plan view of the vicinity of a seedling vertical feeding mechanism in a seedling mounting table.

FIG. 3 is a vertical sectional front view of a seedling vertical feeding mechanism.

FIG. 4 is a side view showing the vicinity of a driving unit of a seedling vertical feeding mechanism.

FIG. 5 is an overall side view of the seedling planting apparatus.

[Explanation of symbols]

 2 Nursery stand 3 Planting mechanism 6 Seedling feed belt 6b Driving rack 10a Ridge 10b Guide S

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshiyuki Kojima 64 Ishizukita-cho, Sakai-shi, Osaka Kubota Sakai Works Co., Ltd. (56) References 36214 (JP, U) Japanese Utility Model Showa 60-177723 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) A01C 11/02 362

Claims (1)

(57) [Claims] 1. A seedling rest (2) on which seedlings (N) are placed,
A planting mechanism (3) for taking out seedlings (N) from the lower part of the seedling rest (2) and planting the seedlings (N) on a rice field surface; and attaching a seedling feed belt (6) having a predetermined width to the seedling rest (2). By arranging the seedling feeding belt (6) in the vertical feeding direction along the vertical feeding direction,
The seedling feed belt (6) comes into contact with the bottom surface of the seedling (N),
The seedlings (N) are configured to be fed vertically to the lower side of the seedling placing table (2), and contact with the back surface (S) of the portion of the seedling feeding belt (6) that contacts the seedlings (N). Seedlings (N) of the seedling feeding belt (6)
A plurality of ridges (10a) for supporting a portion in contact with the vertical direction, and a driving rack (6b) formed on the back surface (S) of the seedling feed belt (6) is provided with A guide portion (10b) is provided to be located between the ridges (10a) corresponding to the right and left portions of the seedling feed belt (6), and receives the drive rack portion (6b). Vertical feed structure of seedling planting equipment.