JP6821132B2 - Rice transplanter - Google Patents

Description

The present invention relates to a transplanter for seedlings, seed potatoes, etc., and belongs to the technical field of agricultural machinery.

Conventionally, a tray supply device that feeds a pot-type seedling tray that individually stores a plurality of seedlings in the vertical and horizontal directions at a constant pitch by a vertical feed rod, and a seedling extraction device and a seedling extraction device that take out seedlings from the seedling tray. There is known a transplanting machine provided with a seedling planting device for planting seedlings received from (see, for example, Patent Document 1).

In the tray supply device of the conventional transplanter, seedlings are taken out one by one from the side-by-side pots by the seedling extraction device while moving in the left-right direction by the lead cam axis, and the tray supply device moves to the end and is in a horizontal row. When all the seedlings in each pot of the minute are taken out, the seedling tray is moved downward (vertically) by the amount of the pots in a horizontal row by the vertical feed rod.

Specifically, the vertical feed rod is interlocked with the rotating arm fixed to the vertical movement operating shaft, and is oscillatingly connected to the vertical feed arm that rotates in the vertical direction by being connected to the tension spring. There is. Then, the lower end of the vertical feed rod swings up and down in conjunction with the movement of the vertical feed arm, so that it enters the gap on the back side of the pots arranged adjacent to each other in the vertical direction, and is equivalent to one horizontal row. The seedling tray is pushed down (vertically) while contacting the pots, and after a predetermined time elapses, it escapes from the gap and rises, enters the gap on the back side of the next pots again, and puts the seedling tray into the machine body. The configuration is such that the above-mentioned series of vertical swinging operations of pushing down (vertically) is repeated at a predetermined timing.

Here, in the case of a conventional transplanter, the operation of the vertical feed rod coming out of the gap on the back side of the pots and rising is such that the arm fixed to the vertical movement operating shaft forcibly pushes the vertical feed arm upward. The operation of the vertical feed rod pushing the seedling tray downward (vertical direction) by rotating the seedling tray is performed by the restoring force of the pulling spring that constantly pulls the vertical feed arm downward and the weight of the seedling tray itself.

Japanese Unexamined Patent Publication No. 2014-233220

However, in the above-mentioned conventional transplanter, the weight of the seedling tray becomes lighter in the latter half of the longitudinal direction of the seedling tray, and the vertical feed of the seedling tray is surely performed only by the restoring force of the spring that pulls the vertical feed arm downward. It may not be possible to do so.

An object of the present invention is to provide a transplanter capable of reliably vertically feeding a seedling tray in consideration of such a problem of a conventional transplanter.

The first invention is
A tray supply device (100) for supplying a tray (20) containing a transplant (22), and a tray supply device (100).
A lateral feed device (170) that feeds the tray supply device (100) in the lateral direction, and
A transplanter equipped with a planting device (200, 300) for taking out the transplant from the tray (20) and planting it in a field.
The tray supply device (100)
A tray vertical feed member (121) that repeats a vertical feed operation for feeding the tray in the vertical direction,
A vertical feed arm (140) having one end rotatably attached to the tray supply device (100) and the other end connected to the tray vertical feed member (121).
One end is fixed to the rotation shaft (151), and the other end (152) rotates along the shape of the lower end edge of the vertical feed arm (140) to rotate the vertical feed arm (140). It has a vertical feed drive arm (150) that rotates up and down,
The vertical feed arm (140) has a portion (143d) in which the vertical feed arm (140) is forcibly rotated downward by a force exerted by the vertical feed drive arm (150) while rotating. It is a transplanter characterized by being.

Further, the second invention of the present invention
The portion (143d) is of the longitudinal feed arm (140) at a contact point where the longitudinal feed drive arm (150) is in contact with the portion (143d) at the lower end edge of the longitudinal feed arm (140). The vertical force (F) passing through the contact point with respect to the tangent line is a portion having a component (Fy) in the direction of rotating the vertical feed arm (140) downward.
In the portion (143d), when the tray vertical feed member (121) stays in front of a predetermined lower limit position, the vertical force (F) rotates the vertical feed arm (140) downward. This is the first transplanter of the present invention, which is a site having a component (Fy) in the direction of causing.

Moreover, the third invention of this invention
In the tray (20), a plurality of pots (21) are formed with a predetermined gap in the vertical and horizontal directions.
Support side plates (113L, 113R) for supporting the vertically fed trays from both sides are provided on the left and right sides of the tray supply device (100).
The tray vertical feed member (121)
Contact portions (121a, 122) that enter the gap between the pots (21) arranged adjacent to each other in the vertical direction, abut against a horizontal row of the pots (21) arranged in the horizontal direction, and push downward. When,
It has a support arm portion (121b) that supports the contact portion (121a, 122) from the outside of the support side plate (113L, 113R).
The support side plate (113L, 113R) has a notch in a region corresponding to the operation locus of the contact portion (121a, 122) in a side view.
The notch portion is characterized in that when the contact portion (121a, 122) comes into contact with the notch portion, the contact portion (121a, 122) is guided to the downstream side of the operation locus. The first or second transplanter of the present invention.

Further, the fourth invention of the present invention
The surface of the portion of the contact portion (121a, 122) that abuts on the pot (21) is flat.
The tray supply device (100) enters the gap between the pots (21) arranged adjacent to each other in the horizontal direction of the tray, and guides the tray (20) vertically fed in the vertical feed direction. It has a guide member (123) and
The third invention is characterized in that, in the flat plate-shaped surface of the contact portions (121a, 122), a portion on the side intersecting with the tray guide member (123) is cut out. It is a transplanter of.

Moreover, the fifth present invention
The planting device (200, 300)
A planting hopper (1111L, 1111R) that is configured to be movable in the vertical direction and can be opened and closed in the horizontal direction to plant the transplant in the field.
The tip portion (1030) has a scraper portion (1000) which is inserted into the inside from the front side of the planting hopper (1111L, 1111R) and comes into contact with the inner wall surface.
A guide member that guides the inside of the planting hopper (1111L, 1111R) while deforming the tip portion (1030) by contacting the tip portion (1030) of the scraper portion (1000) with the front surface side. (1130L, 1130R) is provided,
The tip portion (1030) of the scraper portion (1000) is guided by the guide member (1130L, 1130R) and deformed while being inserted into the planting hopper (1111L, 1111R), and then deformed. It is a transplanter of the present invention according to any one of the above 1st to 4th, characterized in that all or part of it is eliminated.

According to the first invention, since the vertical feed of the tray (20) can be reliably performed over a predetermined distance, the seedlings can be reliably planted in the field with the planting device (200, 300).

Further, according to the second invention, in addition to the effect of the first invention, as an example of the portion (143d), the vertical feed drive arm (150) is based on the rotation direction of the vertical feed drive arm (150). ) Is formed on the lower end edge (140a) on the downstream side of the virtual straight line (L) connecting the rotation axis (151a) of the vertical feed arm (140) and the rotation axis (141a) of the vertical feed arm (140) in a side view. The other end (152) of the vertical feed drive arm (150) comes into contact with the vertical feed member (121) only when the tray vertical feed member (121) stays in front of the predetermined lower limit position. A portion where the arm (140) is forcibly moved downward can be mentioned, and the tray (20) can be reliably vertically fed with a simple configuration.

Further, according to the third invention, in addition to the effect of the first or second invention, the notch portion is such that the contact portions (121a, 122) of the tray vertical feed member (121) come into contact with the notch portion. In this case, the contact portion (121a, 122) is guided to the downstream side of the operation locus, so that even if the tray vertical feed member (121) moves until it comes into contact with the notch portion due to inertia, the downstream portion is described above. Since the tray can be smoothly moved by the guidance to the side, the movement locus of the tray vertical feed member (121) is prevented from being disturbed.

Further, according to the fourth invention, in addition to the effect of the third invention, the flat plate-shaped member of the contact portion (121a, 122) of the tray vertical feed member (121) is brought into surface contact with the tray (20). As a result, the contact pressure can be lowered, so that when the tray vertical feed member (121) moves the tray or stops the movement of the tray, the soil around the root of the seedling housed in the pot is removed. It is possible to prevent compaction and reliably take out seedlings with a seedling extraction device.

Further, in the flat plate-shaped surface of the contact portions (121a, 122), the portion on the side intersecting with the tray guide member (123) is cut out, so that the tray interferes with the tray guide member (123). Since it is possible to prevent the movement of the vertical feed member (121) from being restricted, the flat plate-shaped member of the contact portion (121a, 122) of the tray vertical feed member (121) can be brought into contact with the back side of the tray. The tray can be held in place.

Further, according to the fifth invention, in addition to the effect of any one of the first to fourth inventions, a guide member (1130L, 1130R) is provided on the front side of the planting hopper (1111L, 1111R). As a result, the scraper portion (1000) can be smoothly inserted into the planting hopper (1111L, 1111R), and the scraper portion is not easily damaged by the edge of the planting hopper (1111L, 1111R).

Further, the tip portion (1030) of the scraper portion (1000) is guided by the guide member (1130L, 1130R) and is deformed while being inserted into the planting hopper (1111L, 1111R), and then all or one of the deformations. Since the portion is eliminated, the scraper portion (1000) can easily come into contact with the inner wall portion of the planting hopper (1111L, 1111R), and the mud on the inner wall portion of the planting hopper (1111L, 1111R) can be efficiently removed.

Left side view of the seedling transplanter according to the embodiment of the present invention Top view of the seedling transplanter according to the embodiment of the present invention (A) to (b): perspective view of the tray feeding device of the present embodiment, (c) partially enlarged side view of the tray feeding device. Schematic side view showing the configuration of the tray vertical feed device of this embodiment. (A), (b): Schematic diagram for explaining the presence or absence of a force exerted by the check roller on the vertical feed arm and the direction of the force in the first operation of the present embodiment. (A): Schematic diagram for explaining the direction of the force exerted by the check roller on the vertical feed arm in the second operation of the present embodiment, (b): Partially enlarged schematic of the main part of FIG. 6 (a). Figure Left side view of the seedling planting device and the seedling planting device drive mechanism of the present embodiment (A): Perspective view of a main part of the planting tool of the present embodiment as viewed from the left front, (b): Schematic plan view showing the arrangement relationship between the planting tool of the present embodiment and the scraper device. (A): Plan view of the take-out member of the present embodiment, (b): side view of the take-out member shown in FIG. 9 (a), (c) to (d): second take-out as a modification of the take-out member. Side view of the main part of the member (A): Front schematic view for showing the relationship between the position of the claw of the third take-out member and the seedling raising pot as another modification of the take-out member of the present embodiment, (b): Key points of the third take-out member. Schematic perspective view of the part, (c): side view of the upper and lower claws of the third take-out member, (d): frontal schematic view for showing the position of the claws of the fourth take-out member as yet another modification of the take-out member. , (E): Perspective view of the claw of the fourth take-out member (A): Schematic side view of the main part of the seedling transplanter of the present embodiment with the spare seedling frame attached, (b): Schematic front view of the mounting stay of the seedling frame. Schematic plan view of the preliminary seedling frame of the present embodiment

Hereinafter, a seedling transplanter according to an embodiment of the transplanter of the present invention will be described.

In the present embodiment, the seedling transplanter according to the embodiment of the transplanter of the present invention will be described with reference to the drawings.

FIG. 1 shows a schematic left side view of the seedling transplanter 1 of the present embodiment, and FIG. 2 shows a schematic plan view.

As shown in FIGS. 1 and 2, the seedling transplanting machine 1 for transplanting seedlings such as vegetables includes a pair of left and right front wheels 2R and 2L (driven wheels) and rear wheels 3R and 3L (driving wheels) as traveling wheels. The traveling vehicle body 15, the engine 12 and the mission case (also referred to as the main transmission case) 4 arranged at the front of the traveling vehicle body 15, and the seedling 22 (see FIG. 3A) arranged at the rear of the traveling vehicle body 15. ), A seedling planting device 300 that swings the planting tool 11 up and down to plant the seedlings 22 and a tray supply device 100 that supplies a tray 20 (see FIG. 3A) containing the seedlings 22 and a tray supply thereof. The seedlings 22 are taken out by inserting the tip of the take-out member 260 into the seedling raising pot 21 (see FIG. 3A) of the tray 20 of the device 100, and the seedlings 22 are taken out and supplied to the planting tool 11. A planting depth adjustment mechanism (not shown) including a sensor plate 610 for keeping the attachment depth constant, a suppression wheel 13, a control handle 8, an operation unit 600 arranged at the center of the control handle 8, and the like. It is configured to prepare.

Further, in the vicinity of the handle grip 8L on the left side of the steering handle 8, a main clutch lever 80 for turning on / off the main clutch (not shown) for turning on / off the transmission of the driving force from the engine 12 is provided, and a main clutch lever 80 is provided on the right side. In the vicinity of the handle grip 8R, an elevating operation lever 81 for operating the hydraulic elevating cylinder 10 for elevating and lowering the traveling vehicle body 15 is provided.

Further, the main clutch lever 80 is provided with a contact-type main clutch on / off detection sensor (not shown) that detects the operating position of the main clutch lever 80.

Further, a left traveling clutch lever 90L is provided below the left handle grip 8L of the steering handle 8, and a right traveling clutch lever 90R is provided below the right steering wheel grip 8R. The left traveling clutch lever 90L is a lever for turning on / off the left traveling clutch (not shown) that switches the transmission of the driving force to the left rear wheel 3L as the left driving wheel, and the right traveling clutch lever 90R is on the right side. It is a lever for turning on / off the right traveling clutch (not shown) that turns on / off the transmission of the driving force to the right rear wheel 3R as the driving wheel.

Further, the left traveling clutch lever 90L is provided with a contact type left traveling clutch on / off detection sensor (not shown) that detects the operating position of the left traveling clutch lever 90L, and the right traveling clutch lever 90R is provided with a right. A contact-type right traveling clutch on / off detection sensor (not shown) for detecting the operating position of the traveling clutch lever 90R is provided.

Further, as shown in FIG. 3, the tray supply device 100 includes a seedling stand 110 having a tray transport path 111 that supports the bottom of the tray 20 and is inclined forward, and the tray 20 in the vertical direction along the tray transport path 111. A tray vertical feed device 120 for intermittent feeding is provided.

Here, FIG. 3A is a perspective view of the tray supply device 100, FIG. 3B is an enlarged perspective view of a portion X of FIG. 3A, and FIG. 3C is described later. It is a partially enlarged side view for explaining the flat plate-shaped long plate member 122 fixed to the central portion 121a (see FIG. 3A) on the lower end side of the tray feed rod 121.

As shown in FIG. 3A, the tray 20 is formed by arranging a plurality of seedling raising pots 21 vertically and horizontally, and is made of plastic to maintain flexibility. The seedling raising pots 21 are connected on the front side, and the back surface has a form in which the bottom portion 21c of each seedling raising pot 21 protrudes independently.

The seedling 22 of the present embodiment corresponds to an example of a transplant of the present invention, and the tray 20 of the present embodiment corresponds to an example of the tray of the present invention. Further, the component including the extraction device 200 and the seedling planting device 300 of the present embodiment corresponds to an example of the planting device of the present invention.

Further, the seedling transplanter 1 is provided with a tray transport path moving device 170 (see FIG. 2) for reciprocating the seedling stand 110 having the tray transport path 111 in the left-right direction at the rear portion of the traveling vehicle body 15.

As shown in FIG. 2, the tray transport path moving device 170 is provided on the back side of (1) the tray transport path 111, and the driving force from the engine 12 side of the seedling transplanting machine 1 is used for movement during the planting work. The lead cam shaft 171 (FIGS. 2 and 3) that reciprocates the seedling stand 110 in the left-right lateral direction by obtaining the driving force from the stepping motor 175 (see FIG. 2) for the movement while the planting work is stopped. (See)), (2) a guide rail 155 provided above the lead cam shaft 171 to guide the movement of the seedling stand 110 in the left-right direction, and (3) both left and right sides holding the guide rail 155 on both the left and right sides. It has wall portions 172L and 172R.

The lead cam shaft 171 is formed so that spiral grooves (not shown) for right-hand threads and left-hand threads intersect on the outer peripheral surface, and a slider fixed to the back surface of the tray transport path 111 (not shown). ) Is meshed so as to be slidable along the groove. Therefore, when the lead cam shaft 171 rotates intermittently in one direction, the seedling stand 110 intermittently slides in one direction, and one spiral groove (for example, for a right-hand screw) formed on the lead cam shaft 171 is formed. By folding back at the end of the groove) and entering the other groove (for example, a groove for a left-handed screw), the sliding movement direction of the seedling stand 110 is automatically reversed.

By repeating this operation, as shown in FIG. 2, the seedling stand 110 is configured to repeat reciprocating movement between the left wall portion 172L of the tray transport path moving device 170 and the seedling stand transmission case 178. The seedling stand transmission case 178 is a case in which a transmission mechanism for transmitting the driving force from the engine 12 side to the lead cam shaft 171 and the vertical feed rotation shaft 151 described later by a chain belt (not shown) is housed.

Further, the tray transport path moving device 170 is a hydraulically driven drive source for switching which of the driving force from the engine 12 side and the driving force from the stepping motor 175 is transmitted to the lead cam shaft 171. A switching clutch (not shown) is provided in the seedling stand transmission case 178.

The tray transport path moving device 170 of the present embodiment corresponds to an example of the lateral feeding device of the present invention.

Further, in the seedling stand transmission case 178, a position detection sensor 1200 for detecting that the seedling stand 110 of the tray supply device 100 is located at the work start position is arranged. In the present embodiment, the work disclosure position of the seedling stand 110 is the rightmost position of the left-right reciprocating movement range, that is, the position where the seedling stand 110 is closest to the seedling stand transmission case 178.

Further, in the present embodiment, when the seedling stand 110 is located at the work start position, the take-out member 260 is sequentially taken out from the leftmost seedling 22 of the seedling raising pot 21 for one row in the left-right lateral direction of the tray 20.

As is clear from the above, in the feeding operation of the tray supply device 100 of the seedling transplanting machine 1 of the present embodiment, (1) the seedlings 22 of the nursery pot 21 for one row in the horizontal direction of the tray 20 are taken out members. After the seedling stand 110 is intermittently fed laterally to the left and right to be sequentially taken out by 260, and (2) the seedlings 22 of all the seedling raising pots 21 for one row in the horizontal direction are taken out, the seedlings are taken out. There is a vertical feed operation in which the tray 20 on the pedestal 110 is fed downward by the tray feed rod 121 for one horizontal row of the seedling raising pot 21.

In the lateral feed operation, the driving force from the engine 12 side may be used, or the driving force from the stepping motor 175 may be used.

In the vertical feed by the tray feed rod 121, the tip portion of the tray feed rod 121 is engaged with the groove between the adjacent seedling raising pots 21 on the back surface side of the tray 20, and in this state, the tray feed rod 121 is substantially sideways. This is executed by the tray 20 being intermittently vertically fed diagonally downward along the tray transport path 111 by rotating while drawing a rectangular locus A (see FIG. 4).

Further, in the present embodiment, during the planting work, the seedling stand 110 is intermittently moved in the left-right lateral direction by obtaining the driving force from the engine 12 side and operating the tray transport path moving device 170. Each time the moving direction is reversed, the tray 20 placed on the tray transport path 111 of the seedling stand 110 is vertically fed by the tray vertical feeding device 120 for one horizontal row of the seedling raising pot 21. It is a configuration that can be used.

On the other hand, when the seedling stand 110 is moved to the work start position while the planting work is stopped, the seedling stand 110 is reciprocated in the left-right and lateral directions by obtaining the driving force from the stepping motor 175. Even if the direction is reversed, the tray vertical feed device 120 is stopped, and the tray 20 is not vertically fed.

The configuration of the tray vertical feed device 120 of the tray supply device 100 will be described later mainly with reference to FIGS. 4 to 6.

Further, in the seedling transplanter 1 of the present embodiment, as shown in FIGS. 1 and 2, the rotational power output from the engine 12 is branched by the mission case 4, and is left and right via the pair of left and right traveling transmission cases 9. In addition to being transmitted to the pair of rear wheels 3, it is also transmitted to the planting transmission device 18 provided on the rear side of the mission case 4.

That is, in the seedling transplanter 1 of the present embodiment, the seedlings are grown from the seedling raising pot 21 while the traveling vehicle body 15 is advanced while straddling the ridge U by the pair of left and right front wheels 2, 2 and the pair of left and right rear wheels 3, 3. In order to take out 22 and automatically plant it in the ridge U of the field, the power from the mission case 4 is transmitted to the planting transmission device 18, and is transmitted to the extraction device 200 via the chain belt 202, and the planting thereof is performed. It is transmitted to the planting tool 11 via the seedling planting device drive mechanism 400 attached to the transmission device 18 and the seedling planting device 300.

Further, at the upper part of the rear end of the casing 401 of the seedling planting device drive mechanism 400, the upper end portion of the scraper device 1000 for removing mud and the like adhering to the wall surface of the planting tool 11 is rotatably provided. The scraper device 1000 will be described later with reference to FIGS. 7 and 8.

Further, the planting operation of the seedling transplanter 1 of the present embodiment is configured to be intermittently performed by the seedling planting device drive mechanism 400.

The detailed configuration of the seedling planting device 300 and the seedling planting device drive mechanism 400 will be described later with reference to FIGS. 7 and 8.

Further, in the seedling transplanter 1 of the present embodiment, a machine body control mechanism for controlling the posture and vehicle height of the traveling vehicle body 15 by moving the pair of left and right rear wheels 3 and 3 up and down with respect to the traveling vehicle body 15 is provided. There is.

Here, as described above, the tray vertical feed device 120 of the tray supply device 100 will be further described mainly with reference to FIGS. 3 to 5.

FIG. 4 is a schematic side view showing the configuration of the tray vertical feed device 120 of the tray supply device 100. Note that FIG. 4 shows a state in which the central portion 121a of the tray feed rod 121 is located at the lower limit position.

5 (a) to 5 (d) are schematic side views showing the positional relationship between the vertical feed drive arm 150 and the vertical feed arm 140.

The tray vertical feed device 120 enters between the seedling raising pots 21 protruding from the back surface side of the tray 20 and moves downward to feed the tray 20 by one horizontal row of the seedling raising pots 21. It has a tray feed rod 121 having a structure that allows the seedling raising pots 21 to escape from each other and move upward by one horizontal row of the seedling raising pots 21. The tray feed rod 121 is configured so that the central portion 121a can enter and exit the retract groove 111a (see FIGS. 3A and 4) provided in the lower part of the tray transport path 111, and both end portions 121b are bent at right angles. , It is located outside both sides of the tray transport path 111, and is configured so as not to interfere with the movement of the tray 20 on the tray transport path 111.

Further, support side plates 113L and 113R (see FIG. 3B) are provided on both the left and right sides of the tray transport path 111 of the tray supply device 100 to support the vertically fed tray 20 from both sides so that the tray 20 can be smoothly moved. The first cutout portion of the central portion 121a of the tray feed rod 121 so as not to interfere with the substantially quadrangular locus A (see FIG. 4) in the side view described later is provided in the left and right support side plates 113L and 113R, respectively. 113a (see FIG. 3B) is formed. Further, the back edge portion 113a1 (see FIG. 3B) of the first notch portion 113a forms a smooth curve. As a result, even when the central portion 121a of the tray feed rod 121 collides with the inner edge portion 113a1 of the first notch portion 113a due to the inertial force, the central portion 121a follows the traveling direction of the locus A along the curve. Since it moves smoothly to the downstream side with reference to the reference, it is possible to prevent the movement locus A of the tray feed rod 121 from being disturbed.

Further, a flat plate-shaped long plate member 122 is welded and fixed to a portion of the central portion 121a of the tray feed rod 121 that abuts on the bottom portion 21c of the seedling raising pot 21 of the tray 20 (FIGS. 3 (b) and 3). (C).

As a result, the contact pressure can be lowered by bringing the central portion 121a of the tray feed rod 121 into surface contact with the tray 20 via the flat plate-shaped long plate member 122, so that the tray feed rod 121 moves the tray 20. It is possible to prevent the soil around the roots of the seedlings housed in the seedling raising pot 21 from being compacted when the tray 20 is to be moved or when the movement of the tray 20 is stopped, and the seedlings can be reliably taken out by the extraction device 200. ..

Further, in the central portion of the tray transport path 111 of the tray supply device 100 in the left-right width direction, the tray 20 is vertically fed by entering the gap on the back side of the seedling raising pots 21 arranged adjacent to each other in the lateral direction of the tray 20. A tray guide rod 123 for guiding the vehicle in the vertical feed direction is provided (see FIGS. 3 (a) and 3 (c)).

Further, among the flat plate-shaped long plate members 122, the portion 122a (see FIG. 3C) on the side intersecting with the tray guide rod 123 is cut in a concave shape when viewed from the front.

As a result, interference between the flat plate-shaped long plate member 122 and the tray guide rod 123 can be avoided, and the movement of the flat plate-shaped long plate member 122 can be prevented from being restricted. The back side of the seedling raising pot 21 of the tray 20 can be reliably contacted, and the tray 20 can be securely fastened in a predetermined position.

Further, the inclination of the upper side (see FIG. 3B and FIG. 4) of the reinforcing plate 124 arranged on the back side of the evacuation groove 111a is the inclination of the tray transport path 111 (see FIGS. 3B and 4). It is formed more loosely. As a result, the width W of the gap between the lower end of the tray transport path 111 and the upper end of the reinforcing plate 124 can be widened, so that maintenance work such as the lead cam shaft 171 (see FIG. 4) described later can be easily performed.

Further, a predetermined notch (not shown) is formed at the upper end of the reinforcing plate 124 in order to facilitate the work of injecting grease into the lead cam shaft 171.

Further, the tray supply device 100 includes a pair of left and right rod guide plates 112 for restricting the movement of the tray feed rod 121 at the end face portions on both sides of the tray transport path 111 on the downstream side of the evacuation groove 111a. There is. A second notch 112a is formed on the upper end edge of the rod guide plate 112 so that protrusions 121ab protruding downstream can enter at both ends of the central portion 121a of the tray feed rod 121 (FIG. 3 (FIG. 3). b) See).

That is, the second notch portion 112a is the central portion of the tray feed rod 121 temporarily after the central portion 121a of the tray feed rod 121 moves downward and before it comes out from between the seedling raising pots 21. The protrusions 121ab at both ends of the 121a are held, and the tray 20 is restricted from moving downward due to the weight of the seedlings 22 and the soil contained in the seedling raising pot 21. The lower limit is the position of the central portion 121a of the tray feed rod 121 when the protrusions 121ab at both ends of the central portion 121a of the tray feed rod 121 abut on the upper end edge of the second notch 112a. The central portion 121a of the feed rod 121 cannot move below this.

Further, the tray transport path 111 is supported by a lead cam shaft 171 and a guide rail 155 provided on the inner upper portion of the tray transport path 111 to guide left-right movement. As a result, since the guide rail 155 supports the tray transport path 111 at a position away from the lead cam shaft 171, there is little rattling when moving in the left-right direction.

When the tray 20 is inserted from above the seedling stand 110 so as to be sandwiched between the tray transport path 111 and the holding frame 25, the tip of the tray feed rod 121 is engaged with the groove on the back surface side of the tray 20. In this state, the tip of the tray feed rod 121 rotates in a substantially quadrangular locus A (see FIG. 4) in a side view, so that the tray 20 intermittently moves diagonally downward along the tray transport path 111. It is a configuration that is vertically fed.

The take-out device 200 is arranged at a position facing the lower end of the seedling stand 110, and the tip of the take-out member 260 operates so as to draw a locus K (see FIG. 4) and moves in the left-right lateral direction. The seedlings 22 are sequentially taken out from the seedling raising pot 21 and supplied to the planting tool 11.

Next, with reference to FIGS. 3A to 4, a mechanism for intermittently driving the tray feed rod 121 of the tray feeding device 100 will be further described.

FIG. 4 is a schematic side view showing the configuration of the tray vertical feed device 120.

As shown in FIG. 4, in the tray vertical feed device 120, (1) the tray feed rod 121 described above and (2) the upper tip portion 121b1 of both end portions 121b of the tray feed rod 121 are fixed, and one of them is curved inward. The protruding cam 131 having the curved edge 131a is rotatably supported by the feed rod arm 130 formed at the lower portion and (3) the vertical feed arm rotation shaft 141 fixed to the side plate 110a of the seedling stand 110. At the same time, the first concave portion 143a, the first convex portion 143b, the second concave portion 143c, and the rod forced pushing down portion 143d are smoothly supported on the lower end edge portion of the lower end edge portion by the tip portion 142 to rotatably support the feed rod arm 130. When viewed from the take-out device 200 side, the vertically-feeding arm 140 formed continuously and (4) the vertical-feeding rotating shaft 151 rotating in the direction of arrow E by the driving force obtained from the power source of the seedling transplanting machine 1. It is provided with a vertical feed drive arm 150 which is fixed at two positions, a central position and a right end position, of the vertical feed rotation shaft 151, and has a check roller 152 rotatably at the tip end portion.

The rod forced pushing down portion 143d will be described later with reference to FIGS. 5 and 6.

Further, the vertical feed arm pulling spring 160 is provided so that a downward pulling force is always applied to the vertical feed arm 140 between the tip portion 142 of the vertical feed arm 140 and the lower portion 110a1 of the side plate 110a of the seedling stand 110. Is attached. Further, a connecting rod having one end attached to a pin 132 attached to the upper end of the feed rod arm 130 via an elongated hole is attached to the vertical feed arm rotation shaft 141 that rotatably supports the vertical feed arm 140. A connecting rod mounting base 163 for fixing the connecting rod rotating shaft 162 that rotatably supports the other end of 161 is fixed. Here, the connecting rod 161 is provided with a turnbuckle type length adjusting mechanism.

A tension spring may be used instead of the connecting rod 161.

Further, in the present embodiment, as shown in FIG. 4, a portion 144a corresponding to the connecting rod rotation shaft 162 is cut out in advance downward from the upper end edge portion 144 of the vertical feed arm 140. ..

As a result, even when the width of rotation of the vertical feed arm 140 in the clockwise direction is set larger than that without the notch, the upper end edge portion 144 of the vertical feed arm 140 and the connecting rod rotation shaft 162 Interference does not occur. Therefore, for example, in order to be able to use the tray 20 in which the size of the seedling raising pot 21 is large and the total number of the seedling raising pots 21 arranged is small, it is necessary to increase the vertical stroke of the tray feed rod 121. However, even in that case, since interference with the connecting rod rotation shaft 162 can be avoided, the width of rotation of the vertical feed arm 140 in the clockwise direction can be easily increased.

Further, by adjusting the size of the notch portion, when the vertical feed arm 140 rotates too much clockwise, the portion 144a corresponding to the connecting rod rotating shaft 162 becomes the connecting rod rotating shaft 162. By abutting, it becomes a stopper of the vertical feed arm 140.

Further, in the present embodiment, the first convex portion 143b has a gentle inclination, and the tip portion of the tray feed rod 121 slowly rises into the gap between the seedling raising pots 21 in the next row. It can be entered (see reference numerals 121a2 and 121a3 in FIG. 4).

Next, the intermittent operation of the tray feed rod 121 will be described with reference to FIGS. 3 (a) to 4 (4).

In the description of the intermittent operation of the tray feed rod 121, the terms left and right refer to the left hand side as the left and the right hand side as the right when the seedling transplanter 1 is viewed from the front.

It is assumed that the seedling stand 110 is moving to the right, that is, in the direction of arrow H (see FIG. 3A) due to the rotation of the lead cam shaft 171. At that time, the vertical feed rotation shaft 151 is rotating in the direction of arrow E (see FIG. 4).

In the meantime, the extraction device 200 sequentially takes out the seedlings 22 from the rightmost seedling raising pot 21 and supplies the seedlings 22 to the planting tool 11, and then, when the seedling stand 110 moves to the rightmost end, the leftmost end. The seedlings 22 of the seedling raising pot 21 are taken out by the extraction device 200. As a result, all the seedlings 22 for one horizontal row of the seedling raising pot 21 have been taken out.

At this time, it is rotatably attached to the tip of the vertical feed drive arm 150 fixed to the right end of the vertical feed rotation shaft 151, which rotates in the direction of arrow E together with the vertical feed rotation shaft 151. Since the check roller 152 starts contacting the first recess 143a of the vertical feed arm 140 and then starts contacting the curved edge 131a of the feed rod arm 130 with a slight delay, the tray feed rod 121 has a configuration. After moving upward once with the clockwise rotation of the vertical feed arm 140, the vertical feed arm 140 starts rotating counterclockwise at the center of the axis of the tip portion 142.

In the following description of the operation, (1) First, the operation when the tray 20 is smoothly pushed down by the tray feed rod 121 and the operation of the tray feed rod 121 reaching the lower limit position is repeated (this is referred to as "first operation". The operation (referred to as "operation") will be described with reference to FIGS. 4 to 5 (b), and (2) Next, the vertical feed drive arm is stopped while the tray 20 is being pushed down by the tray feed rod 121. FIG. 6A shows an operation (this is referred to as a “second operation”) when a gap is formed between the check roller 152 at the tip of the 150 and the second recess 143c of the vertical feed arm 140. This description will be given with reference to FIG. 6 (b).

Note that FIG. 4 shows a state in which the tray feed rod 121 is located at the lower limit position.

5 (a) and 5 (b) are schematic views for explaining the presence or absence of a force exerted by the check roller 152 on the vertical feed arm 140 and the direction of the force in the first operation.

6 (a) is a schematic view for explaining the direction of the force exerted by the check roller 152 on the vertical feed arm 140 in the second operation, and FIG. 6 (b) is a schematic view of FIG. 6 (a). It is a partially enlarged schematic diagram of a main part.

(1) About the first operation:

(1-1) That is, the tray feed rod 121 is once moved upward in the direction of the arrow 121a0 (see FIGS. 3B and 4), so that the tray previously held in the second notch 112a. The protrusion 121ab of the feed rod 121 comes out of the second notch 112a, and the central portion 121a of the tray feed rod 121, which has been waiting in the gap 21a on the back side of the seedling raising pot 21, is also within the range of the gap 21a. Moves upward in the direction of arrow 121a0. After that, the feed rod arm 130 starts rotating counterclockwise at the center of the axis of the tip portion 142, so that the central portion 121a of the tray feed rod 121 moves in the direction of the arrow 121a1 (see FIG. 4). The notch depth of the second notch portion 112a is set so that the central portion 121a of the tray feed rod 121 can move within the range of the gap 21a.

(1-2) After that, when the check roller 152 continues to revolve in the direction of arrow E, the check roller 152 continues to be in contact with the curved edge 131a of the feed rod arm 130, so that the center of the tray feed rod 121. The portion 121a maintains the state of being located in the retract groove 111a. At this time, at the same time, the check roller 152 moves from the first concave portion 143a of the vertical feed arm 140 toward the first convex portion 143b, so that the vertical feed arm 140 further rotates clockwise (arrow in FIG. 5A). (See I), as a result, the central portion 121a of the tray feed rod 121 moves in the direction (upward) of the arrow 121a2 (see FIG. 4) while maintaining the state of being located in the retract groove 111a.

Here, FIG. 5A is used for the direction of the force exerted on the vertical feed arm 140 when the check roller 152 revolves in the direction of arrow E while abutting on the first convex portion 143b of the vertical feed arm 140. I will explain.

As shown in FIG. 5A, the force F exerted by the check roller 152 rotating in the direction of arrow E on the first convex portion 143b is such that the check roller 152 is in contact with the first convex portion 143b. It is a vertical force passing through the first contact point 145a with respect to the first tangent line 146a of the vertical feed arm 140 at the contact point 145a. The first contact point 145a is a point of action of the force exerted by the check roller 152 on the vertical feed arm 140.

Further, the force F exerted on the vertical feed arm 140 is orthogonal to the first component Fx in the direction of the straight line passing through the rotation shaft core 141a of the vertical feed arm rotation shaft 141 and the first contact point 145a, and the straight line. Moreover, it can be decomposed into the second component Fy in the direction of the straight line passing through the first contact point 145a.

Therefore, as shown in FIG. 5A, of the forces F, only the second component Fy is a force that rotates the vertical feed arm 140 in the direction of arrow I (clockwise in FIG. 5A). That is, it acts as a force to move the tray feed rod 121 upward, and a rotational moment is generated. Of the forces F, the first component Fx is a force toward the rotation shaft core 141a of the vertical feed arm 140, so that no rotational moment is generated.

Here, the description of the first operation using FIG. 4 is returned to again.

(1-3) After that, when the check roller 152 continues to revolve, the check roller 152 becomes non-contact with the curved edge 131a of the feed rod arm 130, and at the same time, the feed rod is restored by the restoring force of the spring (not shown). As the arm 130 instantly rotates clockwise around the axis of the tip portion 142, the central portion 121a of the tray feed rod 121 is directed from the gap 21a toward the gap 21b located on the upper side by one row of the seedling raising pot 21. , Moves as shown by arrows 121a3.

(1-4) After that, when the check roller 152 continues to revolve in the direction of arrow E, the check roller 152 moves to the end portion 143c1 of the second recess 143c while contacting the second recess 143c of the vertical feed arm 140. Therefore, the vertical feed arm 140 is pulled downward by the restoring force of the vertical feed arm pulling spring 160, and as a result, the central portion 121a of the tray feed rod 121 is maintained in the state of being located in the gap 21b, and the arrow While moving in the direction of 121a4 (see FIG. 4), the protrusion 121ab of the central portion 121a of the tray feed rod 121 is held by the second notch 112a. At this time, the tray feed rod 121 is located at the lower limit position, and the tip portion 142 of the vertical feed arm 140 is located at the lower limit position.

Further, here, the terminal portion 143c1 of the second recess 143c is the lower end edge portion 140a of the vertical feed arm 140, as shown in FIG. 5B, the rotation shaft core 141a of the vertical feed arm rotation shaft 141. This is a portion where the virtual straight line L passing through the vertical feed rotation shaft 151 and the rotation shaft core 151a intersects in a side view.

(1-5) After that, when the check roller 152 continues to revolve in the direction of arrow E, the check roller 152 passes through the rod forced pushing down portion 143d in a non-contact state (see FIG. 5 (b)).

That is, as shown in FIG. 5B, in the rod forced pushing down portion 143d, the tray feed rod 121 is located at the lower limit position, and at the same time, the tip portion 142 of the vertical feed arm 140 is located at the lower limit position. In the state, at least on the virtual straight line L, the radius is formed by adding a slight clearance to the distance from the rotation shaft core 151a of the vertical feed drive arm 150 to the outermost peripheral edge of the check roller 152. Any part may be used. The shape of the rod forced pushing down portion 143d will be further described with reference to FIGS. 6 (a) and 6 (b) in the description of the second operation of the item (2).

As a result, the check roller 152 passes through the rod forced pushing down portion 143d in a non-contact state and exerts no force on the vertical feed arm 140, so that it is useless for the tray feed rod 121 already located at the lower limit position. No downward force is exerted on.

The central portion 121a of the tray feed rod 121 moved in the direction of the arrow 121a4 (see FIG. 4) is maintained in a state of being located in the gap between the seedling raising pots on the back side of the seedling raising pot 21, and the seedling stand 110 is used. When the movement is started in the direction of arrow G, that is, to the left, the extraction device 200 sequentially takes out the seedlings 22 from the leftmost seedling raising pot 21 and supplies the seedlings 22 to the planting tool 11, and then the seedling stand 110 is at the leftmost end. At the time of moving to, the seedling 22 of the rightmost seedling raising pot 21 is taken out by the extraction device 200. As a result, all the seedlings 22 for one horizontal row of the seedling raising pot 21 have been taken out.

During this period, the protrusion 121ab of the central portion 121a of the tray feed rod 121 is held by the second notch 112a, so that the tray 20 is displaced downward due to the weight of the seedlings 22 placed in the seedling raising pot 21. It can be prevented from moving. That is, the state in which the protrusion 121ab is held by the second notch 112a is the lower limit position of the central portion 121a of the tray feed rod 121.

When all the seedlings 22 for one horizontal row of the seedling raising pot 21 are taken out, unlike the above, the seedlings can be rotated to the tip of the vertical feed drive arm 150 fixed at the center position of the vertical feed rotation shaft 151. The attached check roller 152 starts contact between the curved edge portion 131a of the feed rod arm 130 and the first recess 143a of the vertical feed arm 140.

By repeating the above operation, the tray 20 is moved to the right or left, and is intermittently vertically fed by one row of the seedling raising pot 21.

As a result, the tray vertical feed device 120 having a compact structure can be obtained. Further, the tray transport path 111 can be supported so as to be movable left and right by the simple structure of the guide rail 155 and the lead cam shaft 171.

Further, since the central portion 121a of the tray feed rod 121 is arranged on the flat surface portion 111b of the tray transport path 111, the tray 20 does not bend inward, so that a gap having a constant width is provided on the back side of the seedling raising pot 21. Since 21a and 21b can be secured, the tray feed rod 121 can surely enter the gaps 21a and 21b.

Further, since the curved surface portion 111c is provided on the downstream side of the flat surface portion 111b of the tray transport path 111, the tray 20 bends along the curved surface portion. Therefore, even when the tray feed rod 121 is moving in the direction of the arrow 121a2 during tray feed, the deflection becomes a resistance and the tray 20 is prevented from shifting to the downstream side.

(2) About the second operation:
Here, for example, due to factors such as an increase in frictional resistance in the transportation of the tray 20 due to the vertical feed of the tray 20 entering the latter half stage, the tray 20 is made of a tray only by the restoring force of the vertical feed arm tension spring 160. The operation when the feed rod 121 is not completely pushed down and stops before the lower limit position will be described mainly with reference to FIGS. 6 (a) and 6 (b).

(2-1) The vertical feed drive arm 150 rotates in the direction of arrow E, and the check roller 152 moves from the first concave portion 143a of the vertical feed arm 140 along the first convex portion 143b, whereby vertical feed is performed. The arm 140 rotates clockwise (see arrow I in FIG. 5A), the central portion 121a of the tray feed rod 121 moves in the direction (upward) of arrow 121a2 (see FIG. 4), and then the arrow. The series of operations up to moving in the direction (forward) of 121a3 (see FIG. 4) is the same as the first operation described above.

(2-2) After that, the tray 20 is stopped from the first time or in the middle of the operation of being pushed down by the tray feed rod 121 in the direction of the arrow 121a4 (see FIG. 4).

In this situation, the tray feed rod 121 has not reached the lower limit position, and therefore the tip 142 of the vertical feed arm 140 is not located at the lower limit position (see FIG. 6A). A gap 152w (FIG. 6A) is formed between the vertical feed arm 140 and the second recess 143c.

Therefore, the check roller 152 passes under the second recess 143c of the vertical feed arm 140 in a non-contact state while moving in the direction of arrow E.

In FIG. 6A, the positional relationship between the check roller 152 and the vertical feed arm 140 in the situation where the gap 152w is generated is shown by a solid line.

(2-3) After that, from the point where the center of the check roller 152 passes through the virtual straight line L (see FIGS. 6 (a) and 6 (b)), the check roller 152 is vertically fed so as to block the movement locus of the check roller 152. The outer peripheral edge of the check roller 152 starts to come into contact with the rod forced push-down portion 143d projecting toward the rotation shaft core 151a of the drive arm 150.

In addition, in FIGS. 6A and 6B, after the check roller 152 passes below the second recess 143c, it moves from the upstream side to the downstream side while contacting the rod forced pushing down portion 143d. The positional relationship of each part in the state is also shown at the same time. That is, the check roller 152 and the vertical feed drive arm 150 at the time when the contact with the rod forced push-down portion 143d is started are shown by a long-dotted chain line, the vertical feed arm 140 is shown by a solid line, and the rod forced push-down portion 143d is shown. The check roller 152 and the vertical feed drive arm 150 at the time immediately before the end of contact with the rod are indicated by a two-dot chain line, and the vertical feed arm 140 is indicated by a two-dot chain line.

Here, FIG. 6B is used for the direction of the force exerted on the vertical feed arm 140 when the check roller 152 revolves in the direction of arrow E while abutting on the rod forced pressing portion 143d of the vertical feed arm 140. I will explain.

As shown in FIG. 6B, the force F exerted by the check roller 152 rotating in the direction of arrow E on the rod forced push-down portion 143d is the second in which the check roller 152 is in contact with the rod forced push-down portion 143d. It is a force in the vertical direction passing through the second contact point 145b with respect to the second tangent line 146b of the vertical feed arm 140 at the contact point 145b. The second contact point 145b is the point of action of the force exerted by the check roller 152 on the vertical feed arm 140.

Further, the force F exerted on the vertical feed arm 140 is orthogonal to the first component Fx in the direction of the straight line passing through the rotation shaft core 141a of the vertical feed arm rotation shaft 141 and the second contact point 145b, and the straight line. Moreover, it can be decomposed into the second component Fy in the direction of the straight line passing through the second contact point 145b.

Therefore, as shown in FIG. 6B, of the forces F, only the second component Fy is a force that rotates the vertical feed arm 140 in the arrow J direction (see FIGS. 6A and 6B). That is, it acts as a force for moving the tray feed rod 121 downward, and a rotational moment is generated. Of the forces F, the first component Fx is a force toward the rotation shaft core 141a of the vertical feed arm 140, so that no rotational moment is generated.

From the above description, the rod forced pushing down portion 143d is vertically fed at least on the virtual straight line L in the state where the tray feed rod 121 is located at the lower limit position described in the above item (1-5). In addition to the requirement that the portion formed by an arc whose radius is the distance from the rotation shaft core 151a of the drive arm 150 to the outermost peripheral edge of the check roller 152 plus a slight clearance is sufficient. " In a situation where the tray feed rod 121 does not reach the lower limit position and is stopped in the middle, all or part of the arc of the rod forced pushing down portion 143d is from the rotation shaft core 151a of the vertical feed drive arm 150 to the check roller 152. It can be said that it is a part formed so as to invade the inside of a virtual circle whose radius is the distance to the outermost peripheral edge of.

From the above, according to the present embodiment, the tray 20 is not completely pushed down by the tray feed rod 121 only by the restoring force of the vertical feed arm tension spring 160, and the tray feed rod 121 is in front of the lower limit position. Even if the tray feed rod 152 is stopped at, the check roller 152 abuts on the rod forced push-down portion 143d formed on the vertical feed arm 140 to surely push down the tray feed rod 121 stopped in the middle to the lower limit position. Therefore, the tray 20 can be reliably fed vertically.

A concave portion (constriction) is formed in a portion of the vertical feed drive arm 150 on the upper side in the rotation direction, and of the vertical feed arm 140 in contact with the check roller 152, contact with the protruding portion is avoided by the concave portion, and the vertical feed is vertically fed. The structure may be such that the rotation of the drive arm 150 is not hindered.

Next, the above-mentioned seedling planting device 300 and the seedling planting device drive mechanism 400 will be further described with reference to FIG. 7.

FIG. 7 is a left side view of the seedling planting device 300 and the seedling planting device drive mechanism 400.

As shown in FIG. 7, the seedling planting device 300 includes a planting tool 11 for planting seedlings 22 in a field, and an upper arm 311 and a lower arm 311 arranged in parallel with each other for swinging the planting tool 11 in the vertical direction. A swing link mechanism 310 having an arm 312, a vertically moving arm 320 rotatably attached to the lower arm 312 via a first connecting shaft 321 to move the swing link mechanism 310 up and down, and a planting tool 11. It includes a scraper device 1000 that swings in the vertical direction in conjunction with the scraper device 1000. The first connecting shaft 321 is fixed to the vertical movement arm 320.

The vertical movement arm drive shaft 440 for rotating the vertical movement arm 320 is provided so as to protrude from the seedling planting device drive mechanism 400, and the vertical movement arm 320 is fixed to the tip portion thereof.

Further, as shown in FIG. 7, the seedling planting device 300 is rotatably attached to the lower arm 312 via the second connecting shaft 341, and the opening / closing arm 340 for opening and closing the planting tool 11 and the first connecting shaft 321. The opening / closing roller 342 is rotatably attached to the tip of the opening / closing arm 340 with the second connecting shaft 341 as the center via the third connecting shaft 343. As a result, the opening / closing cam 322 that swings the opening / closing arm 340 in the front-rear direction, one end 351 is connected to the third connecting shaft 343 at the tip of the opening / closing arm 340, and the other end 352 is the opening / closing mechanism of the planter 11. It is provided with an opening / closing connecting cable 350 connected to the 11a side.

Here, the swing link mechanism 310 described above will be further described.

That is, as shown in FIG. 7, the swing link mechanism 310 is rotatably supported by the front upper end portion 401a of the casing 401 containing the seedling planting device drive mechanism 400, the upper end thereof by the upper front shaft 313a, and the lower end portion. The front swing arm 316a rotatably connected to the connecting support plate 315 via the lower front shaft 314a and the rear upper end 401b of the casing 401 accommodating the seedling planting device drive mechanism 400, the upper end is upper rear. The upper shaft provided on the connecting support plate 315 is provided with a rear swing arm 316b which is rotatably supported by the shaft 313b and whose lower end is rotatably connected to the connecting support plate 315 via the lower rear shaft 314b. The front end portion of the upper arm 311 described above is rotatably connected to 316, and the front end portion of the lower arm 312 described above is rotatably connected to the lower rear shaft 314b of the connecting support plate 315. The rear ends of the upper arm 311 and the lower arm 312 are rotatably connected to the rotating upper shaft 317a and the rotating lower shaft 317b provided on the support plate 317 of the planting tool 11.

With the above configuration, when the rotational driving force is transmitted to the vertical movement arm drive shaft 440 in the seedling planting device drive mechanism 400, the vertical movement arm 320 fixed to the vertical movement arm drive shaft 440 rotates in the direction of arrow A1. By moving, the lower arm 312 and the upper arm 311 repeatedly swing up and down and swing back and forth, and the planting operation of the seedling 22 by the planting tool 11 is predetermined with respect to the ridge U. It is done automatically at intervals.

Further, during this planting operation, when the vertical movement arm 320 to which the first connecting shaft 321 is fixed rotates in the direction of arrow A1, the opening / closing cam 322 fixed to the first connecting shaft 321 is opened / closed roller. Since the opening / closing arm 340 rotates while abutting on the outer peripheral edge portion of the 342, the opening / closing arm 340 swings (rotates) in the forward direction (counterclockwise direction) about the second connecting shaft 341. Along with this operation, one end 351 of the opening / closing connecting cable 350 is pulled forward, so that the opening / closing mechanism 11a operates to open the planting tool 11.

Further, when the opening / closing arm 340 swings (rotates) in the backward direction (clockwise) about the second connecting shaft 341, the planting tool 11 provided in the opening / closing mechanism 11a is always urged in the closing direction. Since one end 351 of the opening / closing connecting cable 350 is pulled backward by the action of the force spring (not shown), the opening / closing mechanism 11a operates to close the planting tool 11.

With the above configuration, since the vertical movement arm 320 is driven by one axis, the structure is simple, and the vertical movement arm 320, the opening / closing arm 340, and the opening / closing cam 322 can be compactly configured, and the planting operation can be smoothly performed.

Next, the planting tool 11 and the scraper device 1000 will be further described mainly with reference to FIGS. 8 (a) and 8 (b).

FIG. 8A is a perspective view of a main part of the planting tool 11 as viewed from the front left, and FIG. 8B is a schematic plan view showing the arrangement relationship between the planting tool 11 and the scraper device 1000. ..

In the scraper device 1000 of the present embodiment, as shown in FIGS. 7 and 8 (b), (1) the upper end portion is rotatably connected to the upper rear end of the casing 401 of the seedling planting device drive mechanism 400. The scraper arm 1010 was attached, (2) the scraper mounting stay 1020 having a substantially L-shape in a side view fixed to the lower end of the scraper arm 1010, and (3) the scraper mounting stay 1020 attached to the rear end. It is composed of a scraper main body 1030 having overhanging portions 1031L and 1031R whose central portion projects in an arc shape in the left-right direction.

Further, the scraper main body 1030 is formed with two elongated holes long in the front-rear direction, and is slidably connected to the scraper mounting stay 1020 by a fastening member 1021 through the elongated holes (the scraper main body 1030 is slidably connected to the scraper mounting stay 1020 in the front-rear direction (). See FIG. 8 (b)). As a result, when the scraper body 1030 is inserted into the hopper portions 1111L and 1111R, which will be described later, it becomes easy to adhere to the hopper portions 1111L and 1111R along the curved surface of the inner wall, and mud and the like adhering to the inner wall can be efficiently removed. You can drop it.

Further, in the planting tool 11 of the present embodiment, notches 1112F and 1112B are formed on the front and rear sides of the upper end side of a pair of left and right beak-shaped hopper portions 1111L and 1111R having sharp tip portions in a closed state. There is. Further, the pair of left and right hopper holders 1120L and 1120R (see FIGS. 8A and 8B), which are a part of the opening / closing mechanism 11a (see FIG. 7) for holding the hopper portions 1111L and 1111R so as to be openable and closable, When the scraper main body 1030 is inserted into the hopper portions 1111L and 1111R through the notch portion 1112F on the front side (see FIG. 8A), the left and right overhanging portions 1031L and 1031R of the scraper main body 1030 come into contact with each other. As a result, a pair of left and right scraper guide plates 1130L and 1130R are attached to guide the scraper body 1030 smoothly into the hopper portions 1111L and 1111R while deforming the left and right overhanging portions 1031L and 1031R. Further, the scraper guide plates 1130L and 1130R are arranged so as to cover the end face portion (edge portion) of the notch portion 1112F on the front side of the hopper portion 1111L and 1111R.

As a result, the scraper main body 1030 is smoothly inserted into the hopper portions 1111L and 1111R without being damaged by the end face portion (edge portion) of the notch portion 1112F on the front side. Further, the scraper main body 1030 is guided by the scraper guide plates 1130L and 1130R and is inserted into the hopper portion 1111L and 1111R while being deformed, and then the deformation is eliminated and the scraper main body 1030 returns to the original shape. It becomes easy to come into contact with the inner wall portion of the hopper portion 1111L and 1111R, and the mud on the inner wall portion of the hopper portion 1111L and 1111R can be efficiently removed.

Next, the configurations of the above-described take-out member 260 and the second take-out member 1260, the third take-out member 2260, and the fourth take-out member 3260 as modifications thereof will be further described with reference to FIGS. 9 and 10.

9 (a) is a plan view of the take-out member 260, and FIG. 9 (b) is a side view of the take-out member 260 shown in FIG. 9 (a). 9 (c) and 9 (d) are side views of a main part of the second take-out member 1260 as a modification of the take-out member 260.

Further, FIG. 10A is a front schematic view for showing the relationship between the position of the claw of the third extraction member 2260 and the seedling raising pot 21 as another modification of the extraction member 260, and FIG. 10B is shown in FIG. Is a schematic perspective view of a main part of the third take-out member 2260, and FIG. 10 (c) is a side view of the upper and lower claws of the third take-out member 2260. Further, FIG. 10 (d) is a front schematic view for showing the position of the claw of the fourth take-out member 3260 as yet another modification of the take-out member 260, and FIG. 10 (e) is a front schematic view for showing the position of the claw of the fourth take-out member 360. It is a perspective view of the claw of 3260.

As shown in FIGS. 9 (a) and 9 (b), the take-out member 260 of the present embodiment has a pair of left and right take-out claws from which the tip is inserted into the soil portion in the seedling raising pot 21 to take out the seedlings. It has 261L and 261R and a pair of left and right extrusion rods 262L and 262R for dropping the seedlings 22 taken out from the seedling raising pot 21 and held by the pair of left and right take-out claws 261L and 261R into the planting tool 11. ing.

The pair of left and right take-out claws 261L and 261R include a pair of left and right claw bodies 261aL and 261aR that are detachably fixed to the tip side via a single or a plurality of spacers 263. Further, the tips of the pair of left and right claw bodies 261aL and 261aR are separated into upper and lower bifurcations in a fork shape, and the tips of the claw bodies 261aL and 261aR separated into upper and lower bifurcations are formed on the inner wall surface of the seedling raising pot 21. It has an inclined portion 261b that is inclined more than the inclined angle, the root side of the inclined portion 261b has an obtuse angle in the side view, and the tip side of the inclined portion 261b has an acute angle in the side view.

As a result, when the tips of the claw bodies 261aL and 261aR separated into upper and lower bifurcated parts are inserted into the seedling raising pot 21, the obtuse-angled corners on the root side of the inclined portion 261b come first. Since the sharply angled portion on the tip side of the inclined portion 261b that hits the inner wall surface of 21 does not hit the inner wall surface, it is possible to prevent the wall surface of the seedling raising pot 21 from being pierced.

Further, the rod tip portions 262aL and 262aR of the pair of left and right extrusion rods 262L and 262R are wound around the upper and lower bifurcated portions of the claw bodies 261aL and 261aR so as to be slidable in the front-rear direction to form a substantially elliptical ring shape. The seedlings 22 are pushed out by sliding the rod tips 262aL and 262aR in the direction of arrow M (see FIG. 9B).

Further, when using the tray 20 having a large size of the seedling raising pot 21, by inserting one spacer 263 on each side, the left and right spacing between the claw bodies 261aL and 261aR can be maintained while maintaining the attachment angles of the claw bodies 261aL and 261aR. It can be changed to one that can take out seedlings while avoiding the vicinity of the central part where the roots of seedlings are concentrated. As a result, the roots can be damaged when the seedlings are taken out, hindering the seedlings from taking root in the field and preventing dieback, and it is possible to prevent the seedlings from falling while being carried to the hoppers 1111L and 1111R. ..

Further, when the left-right distance between the nail bodies 261aL and 261aR is close to the root of the seedling by inserting only one of the above spacers 263, two or more spacers 263 are inserted and the nail bodies 261aL and 261aR are inserted. The left-right spacing, especially the left-right spacing Nw on the tip side (see FIG. 9A), is widened so that it enters near the inner surface of the seedling raising pot 21, that is, near the root of the seedling and the outer periphery of the root pot formed by the soil. .. As a result, the seedlings can be fed into the hoppers 1111L and 1111R and planted in the field without damaging the seedlings according to the type and growth degree of the seedlings.

Next, the second take-out member 1260 will be described with reference to FIGS. 9 (c) and 9 (d).

As shown in FIGS. 9 (c) and 9 (d), the second take-out member 1260 has a pair of left and right second claw bodies 1261aL and 1261aR detachably fixed to the tip side via the spacer 263 described above. It has a pair of left and right second take-out claws 1261L and 1261R, and a pair of left and right push rods 262L and 262R described above. The same reference numerals are given to the same configurations.

Although the lengths of the fork-shaped upper and lower bifurcated claws on the tip side of the pair of left and right claw bodies 261aL and 261aR of the take-out member 260 described with reference to FIGS. 9 (a) and 9 (b) were the same. In the case of the second take-out member 1260 shown in FIG. 9 (c), the length of the fork-shaped upper claw portion 1261a1 separated into upper and lower bifurcations on the tip side of the pair of left and right second claw main bodies 1261aL and 1261aR is lower. It is shorter than the length of the claw portion 1261a2.

As a result, for example, as shown in FIG. 9B, when the fork-shaped upper and lower claw portions 1261a1 and 1261a2 have the same length and reach the vicinity of the bottom surface of the trapezoidal seedling raising pot 21 in a side view. As shown in FIG. 9C, the fork-shaped upper claw portion 1261a1 is shorter than the lower claw portion 1261a2 as compared with the width of the upper and lower claw portions (see reference numeral Y in FIG. 9C). Since the width Y of the upper and lower claws (see FIG. 9C) can be widened, the soil in the seedling raising pot 21 can be widely caught, and the seedlings can be reliably captured and taken out.

Further, in the case of this configuration, the pair of left and right extruding rods 262L and 262R are configured to extrude the rod tip portions 262aL and 262aR from the fork-shaped upper left and right claw portions 1261a1 until they are removed (see FIG. 9D).

As a result, the ring-shaped portions of the rod tips 262aL and 262aR are completely removed from the fork-shaped upper short claw portion 1261a1, so that the seedling 22 can be reliably pushed out.

Further, the pair of left and right extrusion rods 262L and 262R have a loop portion (a ring-shaped portion of the rod tip portions 262aL and 262aR) formed on the end side while passing above the claw bodies 261aL and 261aR from the base side. The claw bodies 261aL and 261aR are inserted into the loop portion so as to be located outside the claw bodies 261aL and 261aR. As a result, the so-called connecting portion where the loop portions of the extruding rods 262L and 262R overlap with the claw bodies 261aL and 261aR is located above the claw bodies 261aL and 261aR. Even if the ring-shaped portions of the portions 262aL and 262aR come off, when the ring-shaped portions return to their original positions, they can be configured so as not to come off from the upper short claw portion 1261a1.

Next, in the case of the third take-out member 2260 shown in FIGS. 10 (a) to 10 (c), the difference from the above-mentioned second take-out member 1260 is that the pair of left and right third take-out claws 2261L and 2261R are on the tip side. A pair of left and right third claw main bodies 2261aL and 261aR are separated into an upper separation claw portion 2261a1 and a lower separation claw portion 2261a2, and the upper separation claw portion 2261a1 is overlapped on the outside of the lower separation claw portion 2261a2. It is a point that the position is adjustable and fixed by using the elongated hole formed in the upper separation claw portion 2261a1.

With the above configuration, the distance between the left and right upper separated claws 2261a1 can be widened, so that the opening amount of the claws can be increased, and the position away from the stem 22a (see FIG. 10A) of the seedling 22 can be set. Since it stings, it does not damage the stem 22a.

Further, since the upper separating claw portion 2261a1 is formed with a long hole for fixing, the sum of the protruding lengths of the upper separating claw portion 2261a1 can be adjusted according to the size of the seedling raising pot 21.

Next, in the case of the fourth take-out member 3260 shown in FIGS. 10 (d) to 10 (e), the difference from the above-mentioned take-out member 260 is that the pair of left and right fourth claw bodies 3261aL and 3261aR are abbreviated in front view. The point is that it has a dogleg shape.

As a result, the claws do not hit the four corners of the seedling raising pot 21, so that the amount of opening of the claws can be widened.

Next, the configuration of the spare seedling frame will be mainly described with reference to FIGS. 11 to 12.

FIG. 11A is a schematic side view of a main part in a state where the spare seedling frame 700 is attached to the seedling transplanter 1 of the present embodiment, and FIG. 11B is a mounting stay 720 of the seedling frame frame 710. It is a schematic front view of.

Further, FIG. 12 is a schematic plan view of the spare seedling frame 700.

A pair of left and right hooks 701 are provided at the front ends of the seedling frame frames 710 arranged on the left and right. Since the hook 701 is provided at a high position, it can be fixed downward even if the tilt is high.

Further, the hook 701 is fixed in the forward direction, and is configured so that the seedling transplanter 1 can be pulled forward.

In this way, the reason why the hook 701 is fixed forward instead of sideways is that if it is fixed sideways, for example, the seedling transplanter 1 is fixed to the truck bed using the hook. In this case, the hook is strongly pulled in the lateral direction, and the seedling frame frame 710 to which the hook is fixed is deformed. This is to avoid this.

Further, the left and right seedling frame frames 710 are connected and fixed by a reinforcing member 702 at a portion where the hook 701 is attached. As a result, the strength is increased even when the rope is hung on the hook 701.

Further, the mounting stay 720 of the seedling frame frame 710 has a substantially U-shape when viewed from the front (see FIG. 11B). As a result, the seedling frame frame 710 does not get in the way even when the front weight, the front suppression, or the like is attached to the space at the center of the U-shape.

Further, an exhaust cover 703 is attached to the left side of the seedling frame frame 710 so that the exhaust gas does not directly hit the seedling frame frame 710.

Further, since the exhaust cover 703 is inclined toward the outside, the exhaust gas can escape toward the outside.

Further, as shown in FIG. 12, the spare seedling frame 700 includes a right side seedling loading table 730R, a left side seedling loading table 730L, and a central seedling loading table 730, each of which has three stages in the vertical direction. They are arranged one by one.

Further, among the three stages of the central seedling loading table 730, the lower stage is provided with the front side seedling loading table 731F arranged on the front side and the rear side seedling loading table 731B arranged on the rear side, and the front side seedling loading table 731F. As shown in FIG. 11A, the rear side seedling stand 731B is arranged in a substantially V shape with a large opening angle in a side view.

As a result, even after the seedlings loaded on the rear seedling tray 731B, which is in front of the worker working behind the spare seedling frame 700, are taken, the front seedling tray 731F and the rear seedling tray 731F and the rear seedling tray are placed. Since the 731B is arranged in a substantially V shape, the tray slides on the front side seedling loading platform 731F and the rear side seedling loading platform 731B even when the aircraft is tilted back and forth, such as when turning. It is possible to prevent the loaded tray from moving toward the front side seedling loading table 731F, making it difficult for the operator to take out, and preventing the tray from falling from the spare seedling frame 700 due to the momentum of movement.

In the above embodiment, seedlings such as vegetables have been described as the transplants, but any transplants are not limited to vegetables and can be taken out by a take-out device and planted in a field with a planting tool. Is also good.

The seedling transplanting machine according to the present invention has an effect of automatically replenishing a spare tray placed in advance when it is detected that the tray is not in a predetermined position, and the seedlings are taken out from the pot portion of the tray and used in the field. It is useful as a seedling transplanter for planting in.

2L Left front wheel 2R Right front wheel 3L Left rear wheel 3R Right rear wheel 4 Mission case 8 Maneuvering handle 9 Travel transmission case 10 Hydraulic lifting cylinder 11 Planting tool 20 Tray 21 Seedling pot 22 Seedling 25 Presser frame 90L Left traveling clutch Lever 90R Right-running clutch lever 100 Tray supply device 110 Seedling stand 111 Tray transport path 140 Vertical feed arm 143a First concave part 143b First convex part 143c Second concave part 143d Rod forced push-down part 145a First contact point 145b Second contact point 146a 1st tangent 146b 2nd tangent 150 Vertical feed drive arm 151 Vertical feed rotation shaft 152 Check roller L Virtual straight line 155 Guide rail 175 Stepping motor 200 Extraction device 300 Seedling planting device 400 Seedling planting device Drive mechanism

Claims (5)

A tray supply device (100) for supplying a tray (20) containing a transplant (22), and a tray supply device (100).
A lateral feed device (170) that feeds the tray supply device (100) in the lateral direction, and
A transplanter equipped with a planting device (200, 300) for taking out the transplant from the tray (20) and planting it in a field.
The tray supply device (100)
A tray vertical feed member (121) that repeats a vertical feed operation for feeding the tray in the vertical direction,
A vertical feed arm (140) having one end rotatably attached to the tray supply device (100) and the other end connected to the tray vertical feed member (121).
One end is fixed to the rotation shaft (151), and the other end (152) rotates along the shape of the lower end edge of the vertical feed arm (140) to rotate the vertical feed arm (140). It has a vertical feed drive arm (150) that rotates up and down,
The vertical feed arm (140) has a portion (143d) in which the vertical feed arm (140) is forcibly rotated downward by a force exerted by the vertical feed drive arm (150) while rotating. A transplanter characterized by being. The portion (143d) is of the longitudinal feed arm (140) at a contact point where the longitudinal feed drive arm (150) is in contact with the portion (143d) at the lower end edge of the longitudinal feed arm (140). The vertical force (F) passing through the contact point with respect to the tangent line is a portion having a component (Fy) in the direction of rotating the vertical feed arm (140) downward.
In the portion (143d), when the tray vertical feed member (121) stays in front of a predetermined lower limit position, the vertical force (F) rotates the vertical feed arm (140) downward. The transplanter according to claim 1, wherein the portion has a component (Fy) in the direction of causing the rice transplanter. In the tray (20), a plurality of pots (21) are formed with a predetermined gap in the vertical and horizontal directions.
Support side plates (113L, 113R) for supporting the vertically fed trays from both sides are provided on the left and right sides of the tray supply device (100).
The tray vertical feed member (121)
Contact portions (121a, 122) that enter the gap between the pots (21) arranged adjacent to each other in the vertical direction, abut against a horizontal row of the pots (21) arranged in the horizontal direction, and push downward. When,
It has a support arm portion (121b) that supports the contact portion (121a, 122) from the outside of the support side plate (113L, 113R).
The support side plate (113L, 113R) has a notch in a region corresponding to the operation locus of the contact portion (121a, 122) in a side view.
The cutout portion is characterized in that when the contact portion (121a, 122) comes into contact with the cutout portion, the contact portion (121a, 122) is guided to the downstream side of the operation locus. The transplanter according to claim 1 or 2. The surface of the portion of the contact portion (121a, 122) that abuts on the pot (21) is flat.
The tray supply device (100) enters the gap between the pots (21) arranged adjacent to each other in the horizontal direction of the tray, and guides the tray (20) vertically fed in the vertical feed direction. It has a guide member (123) and
The transplant according to claim 3, wherein a portion of the flat surface of the contact portion (121a, 122) that intersects with the tray guide member (123) is cut out. Machine. The planting device (200, 300)
A planting hopper (1111L, 1111R) that is configured to be movable in the vertical direction and can be opened and closed in the horizontal direction to plant the transplant in the field.
The tip portion (1030) has a scraper portion (1000) which is inserted into the inside from the front side of the planting hopper (1111L, 1111R) and comes into contact with the inner wall surface.
A guide member that guides the inside of the planting hopper (1111L, 1111R) while deforming the tip portion (1030) by abutting the tip portion (1030) of the scraper portion (1000) on the front surface side. (1130L, 1130R) is provided,
The tip portion (1030) of the scraper portion (1000) is guided by the guide member (1130L, 1130R) and deformed while being inserted into the planting hopper (1111L, 1111R), and then deformed. The transplanter according to any one of claims 1 to 4, wherein all or part of the transplanter is eliminated.

Images