JP2006325579A - Transplanter for potted seedling - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transplanter for potted seedlings in which feed efficiency of potted seedlings from a horizontal conveying belt to a lowering belt is enhanced and it is prevented from lifting the potted seedlings when a feed claw is raised. <P>SOLUTION: The transplanter 10 for potted seedlings is constituted so that potted seedlings P dropped from the end edge of a horizontal conveying belt 6 are pushed from the upward direction by a vertically swingable feed claw 17 and fed onto the lowering belt 7 and fed to a planting device 8 at the lower end of the lowering belt 7. In the transplanter 10, the feed claw 17 is constituted so as to repeat vertical swinging in an orbit pattern lowering the position along the end edge of the horizontal conveying belt 6 to reach a bottom dead point and then, raising the position separate from the end edge of the horizontal conveying belt 6 to reach an upper dead point. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a pot seedling transplanting machine, and more specifically, a pot seedling fed from an edge of a horizontal conveying belt is pushed from above with a feed claw capable of swinging up and down and forcibly dropped onto a descending belt, and the descending belt The present invention relates to a transplanter that continuously supplies pot seedlings to the planting device from the lower end of the plant and transplants them to the field.

  This kind of pot seedling transplanter is operated in the horizontal direction (the width direction of the transplanter) with a seedling receiving arm waiting in front of a row of pot seedlings extruded from the pot seedling box on the seedling platform. Is fed onto an endless horizontal transport belt, dropped from a downstream edge in the transport direction onto a pair of descending belts, fed to a lower disk-shaped planting device, and pot seedlings are sequentially transplanted to a field by this planting device. ing. In order to smoothly and quickly drop the pot seedling from the horizontal conveyor belt to the descending belt, a feed claw that moves up and down is arranged so that the pot seedling reaching the edge of the horizontal conveyor belt is pushed between the descending belts from above. It is installed. (See Patent Document 1 and Patent Document 2)

However, since the feed claws disclosed in Patent Document 1 and Patent Document 2 simply swing up and down using the horizontal support shaft as a swing support point, the feed pawl is lowered along the edge of the horizontal transport belt to the lower belt. Even after the pot seedling is forcibly dropped, it moves up along the edge of the horizontal conveyance belt, so that the feed claw functions like a shutter, and the subsequent pot seedling is moved on the horizontal conveyance belt by this feed claw. It will be dammed up. Therefore, when the operation speed of the feed claw is increased, the timing of automatic dropping from the edge of the horizontal conveyance belt into the shutter is not in time, which causes a limit on the transplanting speed to the field by the planting device.
In addition, the feed claw ascends along the edge of the horizontal conveyor belt as it reaches the bottom dead center, so the pot seedling is lifted when it rises, the pot seedling supply interval changes, and the position of the pot seedling Sometimes changed. When the pot seedling supply interval is changed, the planting timing is shifted. On the other hand, when the pot seedling position is changed, there is a problem in that the pot portion is collapsed without the feed claw hitting the center of the pot portion.

Japanese Patent No. 2787536 Japanese Patent No. 2826695

  The present invention has been made in view of the above problems, and has an object to increase the pot seedling feeding efficiency from the horizontal conveyance belt to the lowering belt and to prevent the pot seedling from being lifted when the feed claw is raised. Yes.

In order to solve the above-mentioned problems, the present invention is to push a pot seedling dropped from the edge of the horizontal conveyance belt from above with a feed claw that can swing up and down and supply it to the lowering belt, and plant it at the lower end of the lowering belt. A transplanter for pot seedlings to be fed to the attaching device,
The feed claw moves up and down in a trajectory pattern that descends along the edge of the horizontal conveyance belt and reaches bottom dead center, then rises away from the edge of the horizontal conveyance belt and reaches top dead center. There is provided a pot seedling transplanter configured to repeatedly swing.

  With this configuration, after the feed claw descends along the edge of the horizontal conveyance belt and reaches bottom dead center, the feed claw rises away from the edge of the horizontal conveyance belt. Meanwhile, the succeeding pot seedling is not blocked by the edge of the horizontal conveyance belt by the feed claw, and can be smoothly supplied into the shutter from the edge of the horizontal conveyance belt. Therefore, by adjusting the conveyance speed of the horizontal conveyance belt and the vertical swing timing of the feeding claw, the pot seedling is efficiently fed to the descending belt, and the transplanting efficiency is improved.

  In addition, since the feed claw rises so as to be swung away from the bottom dead center, the pot seedling reaching the edge of the horizontal conveying belt is not lifted, and the feeding interval of the pot seedling is increased. There is no change and no change in the position of the pot seedling. Therefore, it is possible to suitably prevent the planting timing from shifting or the pot part from collapsing without the feed claw hitting the center of the pot part.

The feed claw is fixed to the tip of a swing rod that swings up and down with a horizontal support shaft as a swing support point,
The swing rod is hinged to a base bracket attached to the horizontal support shaft so as to be rotatable, and is connected to a rotary drive shaft via a crank mechanism in the middle thereof.
The crank and the crank arm constituting the crank mechanism are connected via a crank pin in a state of being biased by biasing means in a direction close to each other, and a cam mechanism is interposed between the crank and the crank arm. Intervened,
When the swinging rod swings up and down with the rotation of the rotary drive shaft, the crank arm approaches the crank together with the swinging rod by the biasing force of the cam mechanism and the biasing means. It is preferable that the feeding claw is configured to form the track pattern by repeating the separation.

  With this configuration, the track pattern that rises away from the edge of the horizontal conveyor belt when the feed pawl is raised is easily realized by the crank mechanism and cam function, so the structure can be simplified and the practical value is extremely high. It will be a thing.

Specifically, it is preferable that the cam mechanism is configured such that the crank arm is separated from the crank when the feed pawl is raised, and the crank arm is close to the crank when the feed pawl is lowered.
The cam constituting the cam mechanism has an annular ridge formed on the crank-side facing surface of the crank arm, the height of the facing direction gradually changing in the circumferential direction around the crank pin, Preferably, the crank is formed with a sliding protrusion that slides on the annular ridge.
Further, it is preferable that a compression spring for urging the crank arm toward the crank side is provided as the urging means between the crank pin and the crank.

It is preferable that the tip of the swing rod on the horizontal support shaft side and the swing bearing boss that is rotatably fitted to the horizontal support shaft are connected via an elastic body.
Specifically, an elastic body made of a spring piece is interposed between the receiving piece protruding from the outer peripheral surface of the rocking bearing boss and the tip of the rocking rod, and both ends of the spring piece are rocked with the receiving piece. It is fastened and fixed with bolts and nuts to the pallet.
With this configuration, the swing rod swings up and down, and when it reaches the bottom dead center and the top dead center, it swings slightly in the lateral direction and swings in a substantially elliptical orbit pattern. Sometimes, the elastic body does not cause backlash in the left-right direction between the oscillating bearing boss of the horizontal shaft. Thus, by not generating rattling, the rocking ridge can always be swung in a normal path, and the pot seedling can be reliably pushed from the horizontal conveying belt to the descending belt.

  As is clear from the above description, according to the present invention, after the feed claw reaches the bottom dead center, the feed claw rises away from the edge of the horizontal conveyor belt. Falls without being blocked by the edge of the horizontal conveying belt by the feeding claw, and the subsequent pot seedling can be efficiently fed to the descending belt, thereby improving the transplanting efficiency. In addition, since the pot seedling that reaches the edge of the horizontal conveyor belt is not lifted by the feed claw, it does not cause a change in the feeding interval of the pot seedling or a change in the position of the pot seedling. Can be prevented from collapsing.

  Further, by providing an elastic body between the swing rod and the horizontal support shaft that supports the swing rod so as to be swingable, it is possible to prevent rattling from occurring when the swing rod swings. It is possible to accurately maintain the trajectory pattern of the swinging rod and to push the pot seedling into the lower belt from the tip of the horizontal conveyance belt.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 5 show a first embodiment of a pot seedling transplanter of the present invention, and FIG. 1 is an overall side view.
The pot seedling transplanting machine 1 shown in FIG. 1 laterally moves the engine 3 mounted on the front (traveling direction) of the vehicle body frame 2, the wheels 4, the seedling box stand 5, and the pot seedling extruded from the pot seedling box. A pair of left and right horizontal transport belts 6 transported in the direction (width direction of the transplanter), a descending belt 7 disposed below an edge (transport direction end) of the horizontal transport belt 6, and a disk-shaped transplant Attaching device 8, grooving plate 9, earthing wheel 10 and the like are provided.

The power of the engine 3 is transmitted to the wheels 4 through the speed reducer 11 and the chain 12 and the pot seedling planting part 14 including the planting device 8 through the speed reducer 11 and the planting part shaft 13 and the like. Drive transmission. Further, the power is transmitted to the pot seedling supply unit 16 including the horizontal transport belt 6, the lowering belt 7, and an operation mechanism of a feed claw 17 to be described later via the speed reducer 11 and the supply unit shaft 15.
In the pot seedling transplanter 1 of this embodiment, an operator (not shown) operates while driving the engine 3 to rotate the wheel 4 and operating the pot seedling planting unit 14 and the pot seedling supply unit 16. The self-operated handle 18, side clutch lever 19 or planting clutch lever 19a, etc. are used to run the field by hand and transplant the pot seedling. This is a riding type transplanter provided with a driver's seat. Needless to say.

  Of the pot seedling supply section 16, the mechanism for supplying the pot seedling to the horizontal transport belt 6 is the same as that disclosed in Patent Document 1, and therefore a detailed description thereof is omitted. The mechanism relating to the feeding of the pot seedling to 7 and the supply to the planting device 8 will be described in detail.

  1 and 2, the horizontal conveyor belt 6 is arranged for a pair of left and right for two-row planting, and is set to operate in opposite directions (toward both outer sides of the transplanter 1). FIG. 2 shows an enlarged view of a main part viewed from the side of FIG. A pair of left and right pot seedling planting portions 14 such as a feed claw 17 and its operation mechanism, a descending belt 7 and a planting device 8 are also provided. A large number of partitioning claws 6a project from the surface of the horizontal transport belt 6 at equal intervals in the longitudinal direction, and the supplied pot seedlings P are divided and transported for each seedling.

  The feed claw 17 is fixed to the tip of a swing rod 19 that swings up and down with a horizontal support shaft 18 fixed to the vehicle body frame 2 as a swing support point. The swing rod 19 is connected to a base bracket 19 a rotatably attached to the horizontal support shaft 18 via a hinge pin 19 b orthogonal to the horizontal support shaft 18. In other words, such a movement is allowed that the front side rotates in the vehicle body width direction with the hinge pin 19b as a fulcrum. Further, the swing rod 19 is drivingly connected to the rotary drive shaft 21 via a crank mechanism 20 at an intermediate position thereof. In addition, 19c is a restraining member for restraining the rocking rod 19, and is preferably made of an elastic material so as to absorb a squeak at the time of left and right rocking. You may make it raise.

  As shown in FIG. 4, the crank mechanism 20 includes a crank 20b fixed to the rotary drive shaft 21 by a bolt 20a, a crank pin 20c rotatably fitted in the crank 20b, and the crank pin 20c. The swing arm 19 is provided with a connecting pin 20e on the operating end side of the crank arm 20d so as to be rotatable. A compression spring 20f (biasing means) is elastically mounted between the crank 20b and the crankpin 20c. The elasticity of the compression spring 20f urges the crank arm 20d to be always attracted to the crank 20b side. Yes.

  A cam mechanism 22 is interposed between the crank 20b and the crank arm 20d. As the rotary drive shaft 21 rotates, the swing rod 19 swings up and down, and the biasing force of the cam mechanism 22 and the compression spring 20f As a result of this cooperative action, the crank arm 20d is configured to repeatedly approach and separate from the crank 20b together with the swing rod 19.

  Specifically, an annular raised portion (cam) 22a centering on the axis of the crankpin 20c is formed on the surface of the crank arm 20d facing the crank 20b, and the raised height of the annular raised portion 22a is circumferential. The top surface is the cam surface 22b. The raised height gradually changes between the highest portion 22c and the lowest portion 22d at the diametrically opposed positions. On the other hand, on the surface of the crank 20b on the crank arm 20c side, a semi-spherical sliding protrusion (cam follower) 22e that is in sliding contact with the cam surface 20b of the annular raised portion 22a is fixed. The distance from the axial center of the crank pin 20c at the apex of the sliding protrusion 22e is substantially the same as the radius of the central annular portion of the annular raised portion 22a, and the crank arm 20d is as described above. Therefore, regardless of the relative positional relationship between the crank 20b and the crank arm 20c, the sliding protrusion 22e is on the cam surface 20b of the annular ridge 22a. It will be in the state contacted in any one of these positions.

  Two rows of descending belts 7 and 7 that operate in a mutually opposed relationship are disposed immediately below the edge of the horizontal conveying belt 6 on the pot seedling sending side (see FIG. 3), and the pot seedlings P that have been sent out are sandwiched sequentially. Then, it is transferred to the planting device 8. A seedling receiver 23 for preventing the pot seedling P from jumping out is supported on one end of the swinging support shaft 23b at the feeding portion from the edge of the horizontal conveying belt 6 to the descending belts 7 and 7 and can swing. And is urged toward the horizontal conveying belt 6 by the compression spring 23a. The seedling receiver 23 temporarily receives the pot seedling P that has been sent and dropped from the end of the horizontal conveyance belt 6 so that the pot seedling P can be dropped onto the lowering belts 7 and 7. A disc-shaped planting device 8 is placed close to the lower part of the descending belts 7 and 7, and is received so as to sandwich the pot seedling P supplied from the descending belts 7 and 7 while rotating in the direction indicated by the arrow in FIG. The rotation is continued, and the pot seedling P is planted in the ground groove formed by the grooved plate 9 so as to be lowered from the pot portion. The pot seedling P planted is subjected to earthing by the earthing wheel 10. The planting device 8 is driven from the driving mechanism of the descending belts 7 and 7 via a transmission mechanism (not shown), and the rotational speed thereof is determined by the timing of receiving the pot seedling from the descending belts 7 and 7 and the planting device 8. It is set to synchronize with movement.

Next, the operation of the feed claw 17 will be described.
2 and 3 indicate the state where the feed claw 17 is at the top dead center, and the two-dot chain line indicates the state where the feed claw 17 is at the bottom dead center. The crank 20b that constitutes the crank mechanism 20 rotates around its axis by the rotation of the rotation drive shaft 21, and accordingly, the crank pin 20c that is rotatably fitted to the crank 20b is also connected to the rotation drive shaft 21. Rotate around. 2 and 3 show that the crank pin 20c is positioned at the uppermost portion, and the swing rod 19 connected to the clan pin 20c via the crank arm 20d is pulled up. In this state, the feed claw 17 is positioned above the edge of the horizontal conveyance belt 6. At this time, the sliding protrusion 22e fixed to the crank 20b and the highest portion 22c of the annular raised portion 22a formed on the crank arm 20d are both positioned at the uppermost portion and brought into pressure contact with each other. Therefore, the contact between the sliding protrusion 22e and the highest portion 22c of the annular raised portion 22a brings the crank arm 20d away from the crank 20b against the elasticity of the compression spring 20f.

  As the rotary drive shaft 21 rotates, the crank 20b and the crank pin 20c rotate around the axis of the rotary drive shaft 21, and along with this, the crank arm 20d is connected to the swing rod 19 as a connecting portion. Due to the restriction of the pin 20e and the rotational action of the crank pin 20c around the axis of the rotational drive shaft 21, the pin 20e is displaced downward while drawing a semicircular locus while maintaining the relative vertical positional relationship substantially. Due to the displacement operation of the crank arm 20d, the swing rod 19 swings downward around the axis of the horizontal support shaft 18 via the connecting pin 20e, and the feed claw 17 descends along the edge of the horizontal transport belt 6. When the crank 20b rotates halfway, it reaches the bottom dead center position indicated by a two-dot chain line. The feed claw 17 was temporarily received by the seedling receiver 23 while coming into contact with the seedling receiver 23 and pushing it downward when descending along the edge of the horizontal conveyance belt 6. Acting on the pot seedling P, the pot seedling P is supplied between the descending belts 7 and 7.

  During the half rotation of the crank 20b, the crank arm 20d is also displaced downward along the semicircular locus as described above, so that the protruding height of the sliding protrusion 22e gradually decreases from the highest portion 22c of the annular ridge 22a. When the cam 20b slides halfway and the crank 20b rotates halfway, it reaches the lowermost part in a state of being pressed against the lowest part 22d of the annular raised part 22a as shown by a two-dot chain line in FIGS. Accordingly, the crank arm 20d is pulled toward the crank 20b side by the crank pin 20c by the elasticity of the compression spring 20f, and the feed claw 17 is a horizontal conveying belt as compared with the case of the top dead center position indicated by the solid line. The bottom dead center will be reached at a position close to the edge of 6. Although the crank arm 20d is connected to the swing rod 19 by the connecting pin 20e, the swing rod 19 is hinged to the base bracket 19a via the hinge pin 19b as described above. Is allowed to move smoothly as shown in FIG.

  Next, when the rotation of the rotary drive shaft 21 is continued, the crank 20b also rotates around the axis of the rotary drive shaft 21 as it is, half-rotates to the original solid line position, and in conjunction with this, the crank arm 20d Draws the semicircular locus following the above and reaches the solid line position in the same manner. The swing rod 19 connected to the crank arm 20d swings upward, and the feed claw 17 reaches the top dead center at the solid line position. When moving from the bottom dead center to the top dead center, the sliding protrusion 22e slides on the cam surface 22b where the raised height gradually increases from the lowest portion 22d of the annular raised portion 22a. It gradually moves upward away from the crank 20b. Along with this, the feed claw 17 rises away from the edge of the horizontal conveyance belt 6 in the lateral direction as shown in FIG. Accordingly, the pot seedlings P that are sequentially transported on the horizontal transport belt 6 fall to the descending belt 7 side without being blocked by the feed claws 17, and therefore, the pot seedlings P from the edge of the horizontal transport belt 6. Is smoothly transmitted without delay. Further, since the feed claw 17 is lifted away from the horizontal conveyance belt 6, the pot seedling P is not lifted. Therefore, the transplanting interval of pot seedlings can be shortened, and the transplanting efficiency is dramatically improved.

  Further, as shown in FIG. 5, the horizontal distance L between the feed claw 17 and the edge of the horizontal transport belt 6 when the feed claw 17 moves up and passes the side of the horizontal transport belt 6 is the pot seedling P. If it is set to be larger than the diameter D of the pot portion, the fall of the pot seedling P from the edge of the horizontal conveying belt 6 becomes smooth and reliable. By the continuous rotation of the rotary drive shaft 21, the swing rod 19 is repeatedly and smoothly swung up and down while swinging left and right with the hinge pin 19b as a fulcrum, and the pot is sequentially transported on the horizontal transport belt 6. The seedling P is smoothly delivered from the edge thereof, and is surely supplied between the lowering belts 7 and 7 for each seedling by the feed claw 17, and then transferred to the planting device 8 and transplanted to the field.

6 and 7 show the second embodiment, and the structure of the connecting portion between the swing rod 19 and the horizontal support shaft 18 is different from that of the first embodiment.
In the second embodiment, an elastic body comprising a spring piece 32 between a receiving piece 31 projecting from the outer peripheral surface of a rocking bearing boss 30 rotatably attached to the horizontal support shaft 18 and the tip of the rocking rod 19. The other end of the spring piece 32 is fastened by the receiving piece 31 and the other end of the spring piece 32 is fastened by a bolt 33 and a nut 34, respectively.
Since other configurations are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.

  As described above, when the spring piece 32 is interposed between the rocking bearing boss 30 and the rocking rod 19 of the horizontal support shaft 18, the left and right after the rocking rod 19 reaches the bottom dead center and the top dead center. When swinging in the direction, the play in the left-right direction generated between the swinging rod 19 and the swinging bearing boss 30 is absorbed by the spring piece 32 to prevent rattling. As a result, the swing rod 19 can always swing up and down along the normal path, and the pot seedling can be accurately pushed from the tip of the horizontal conveyance belt to the lowering belt.

  Although a two-row planting machine for pot seedlings has been described as an example, it goes without saying that the present invention can also be applied to a pot seedling transplanting machine such as four-row planting. It is also suitable to apply. The descending belt 7 has been described as a straight belt in the vertical direction, but it is also possible to bend the middle of the apparatus and match it with the planting apparatus in consideration of the overall layout of the apparatus. In addition, it is needless to say that the present invention can be applied to transplanters having other structures as long as this type of pot seedling transplanter is used.

It is a whole side view of the transplanter for pot seedlings of a first embodiment of the present invention. It is a principal part side view explaining the operation state of a feed claw. It is the figure seen from the white arrow direction of FIG. It is the longitudinal cross-sectional view. It is drawing explaining the track | orbit of a feeding nail. It is a front view of a second embodiment. It is a top view of a second embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pot seedling transplanter 6 Horizontal conveyance belt 7 Lowering belt 8 Planting device 17 Feeding claw 18 Horizontal support shaft 19 Oscillating rod 19a Base bracket 19b Hinge pin 20 Crank mechanism 20b Crank 20c Crank pin 20d Crank arm 20f Compression spring means)
21 Rotation Drive Shaft 22 Cam Mechanism 22a Annular Raised Part (Cam)
22e Sliding protrusion (cam follower)
30 Spring piece P Pot seedling

Claims (5)

A pot seedling transplanter that pushes a pot seedling dropped from the edge of a horizontal conveyor belt from above with a feed claw that can swing up and down and supplies it to the lowering belt and supplies it to the planting device at the lower end of the lowering belt. There,
The feed claw moves up and down in a trajectory pattern that descends along the edge of the horizontal conveyance belt and reaches the bottom dead center, then rises at a position away from the edge of the horizontal conveyance belt and reaches the top dead center. Pot seedling transplanter that repeats rocking. The feed claw is fixed to the tip of a swing rod that swings up and down with a horizontal support shaft as a swing support point,
The swing rod is hinged to a base bracket attached to the horizontal support shaft so as to be rotatable, and is connected to a rotary drive shaft via a crank mechanism in the middle thereof.
The crank and the crank arm constituting the crank mechanism are connected via a crank pin in a state of being biased by biasing means in a direction close to each other, and a cam mechanism is interposed between the crank and the crank arm. Intervened,
When the swinging rod swings up and down with the rotation of the rotary drive shaft, the crank arm approaches the crank together with the swinging rod by the biasing force of the cam mechanism and the biasing means. The transplanter for pot seedlings according to claim 1, wherein the feeding claw forms the trajectory pattern by repeating the separation.   3. The pot seedling transplant according to claim 2, wherein the cam mechanism is configured such that the crank arm is separated from the crank when the feed claw is raised, and the crank arm is close to the crank when the feed claw is lowered. Machine.   The cam constituting the cam mechanism has an annular ridge formed on the crank-side facing surface of the crank arm, the height in the facing direction gradually changing in the circumferential direction around the crank pin, The pot seedling transplanter according to claim 2 or 3, wherein a sliding protrusion is formed on the crank so as to slide on the annular ridge.   5. The front end of the swing rod on the horizontal support shaft side and a swing bearing boss that is rotatably fitted to the horizontal support shaft are connected via an elastic body. The pot seedling transplanter according to the item.

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