JP4803669B2 - Seedling transplanter - Google Patents

Description

  The present invention relates to a technique of a seedling transplanting machine for planting a vine seedling in a cocoon.

  Conventionally, vine seedlings such as sweet potato seedlings are transported to the vicinity of the planting device by a seedling supply mechanism, and the seedling stem ends are gripped by the action pieces (holding pieces) which are the tip portions of a pair of planted bodies. A seedling transplanting machine that performs a planting operation by swinging the appendage vertically and causing the tips of a pair of planted bodies to enter a field (soil) is known (see, for example, Patent Document 1). .)

  Both planting bodies are configured to open and close by a cam mechanism of a planting drive arm that is interlocked with the vertical swing thereof. Further, in Patent Document 2, in a field covered with a multi-film, when a vine seedling is planted, a clamping piece, which is an action piece at the tip of each planted body, smoothes the multi-film in a streak shape in the front-rear direction of the traveling machine body. An acute-angled blade body was formed at the tip of the sandwiching piece so that it could be pierced (cut).

Also, seedlings when mud or multi-film cut ends adhere to the inner surface (holding surface) and outer surface of the sandwiching piece by planting work, and then the seedling stem ends are gripped (held) by a pair of sandwiching pieces. The holding posture of the end becomes unstable or the holding force cannot be exhibited well. Furthermore, in order to solve the problem that the piercing hole of the multi-film due to the sandwiching piece becomes too large, in Patent Document 2, a scraper means having a scouring shape or a slit that allows passage of the sandwiching piece is provided at the rear part of the traveling machine body. Thus, the pair of planting bodies are arranged so as to hang in a fixed manner so as to be in sliding contact with the inner and outer surfaces of the gripping piece in the ascending stroke.
JP 2004-113077 A Japanese Patent Laying-Open No. 2005-80620 (see paragraph numbers 0035 to 0038, FIGS. 7 and 8)

  However, in the configuration of Patent Document 2, since the scraper means is fixed in position, the sandwiching piece in the planting body draws a bottom-like trajectory from the front upper position of the traveling aircraft toward the rear descending position. When the link mechanism for reciprocating the planting body is arranged on the rear side of the traveling machine body from the sandwiching piece, the scraper means and the link mechanism or the planting body will interfere with each other in position. There was a problem that it could not be applied to the planted body up-and-down reciprocating mechanism having such a configuration.

  Also, if the support body for supporting the scraper body in the scraper means is long up and down, if the rigidity is given so as to fix the scraper body so as to match the movement trajectory of the sandwiching piece, it becomes large, and it gets in the way instead There was a problem.

  The present invention was made to solve the above-mentioned problem, and the scraper body is slidably contacted with the sandwiching piece only temporarily during the returning and rising stroke of the planting body, and during the other strokes, An object of the present invention is to provide a vine seedling transplanting machine provided with a scraper having a compact structure in which the scraper body is separated from the sandwiching piece and does not interfere with the work.

In order to achieve the above object, the invention according to claim 1 of the present invention carries seedlings by transporting the seedlings to the vicinity of the planting device by the seedling supply mechanism and holding the stem ends of the seedlings with a pair of planting claws. The seedling transplanting machine for performing seedling planting work by causing the pair of planting claws to enter the field by the plant body reciprocating mechanism includes a scraper body for wiping the pair of planting claws. scraper body, a posture of separating the sliding contact position with the inner surface of the pair of the planting claw during the return upstroke after planting of the pair of the planting claw, a pair of planting claw when other than the return upstroke The interlocking mechanism is pivotally supported by a cam plate that rotates integrally with the drive shaft of the planting body reciprocating mechanism and a frame of the traveling machine body. A second link connected to the crank link via the first link, and a second link And a cam follower provided on the tank, provided with a spring that holds the scraper body in a posture that enters between a pair of planting claws, and as the pair of planting ridges rotate upward during the return stroke after seedling planting, The scraper body rubs the inner surface of the upper half from the base end side of the pair of planting claws, and when the pair of planting claws comes to a position just before the uppermost position, the cam plate moves the second link and the crank link. It rotates rapidly and is configured to rub the inner surfaces of the lower half of the pair of planting claws with a scraper body .

According to the first aspect of the present invention, there is an effect that the scraper body does not get in the way and the planted seedling is not damaged at the time of grasping (holding) the seedling stalk by a pair of planting claws or planting on the clay.

In addition, the configuration is simplified and the manufacturing cost can be reduced.

Further, there is an effect that after removing the soil adhering to the pair of the planting claw, escape scraper body from the pair of the planting claw (separated) can.

  Next, embodiments of the invention will be described. 1 is an overall side view showing a seedling transplanting machine according to an embodiment of the present invention, FIG. 2 is a plan view, FIG. 3 is a rear view of a seedling supply mechanism, FIG. 4 is a plan view, and FIG. FIG. 5 (b) is a rear view, FIG. 6 (a) is a side view of the state in which the seedling is sandwiched by planting claws, and FIG. 6 (b) is a plan view of the holder that holds the seedling. FIG. 6A is a sectional view taken along the line VIb-VIb in FIG. 6A, FIG. 6C is a sectional view taken along the line VIc-VIc in FIG. 6A, and FIG. 8 is a plan view of the synchronous drive unit of the scraper means and the pressure-reducing means, FIG. 9 is a side view showing the reciprocating mechanism of the planting body, and FIG. 10 is a diagram showing the planting state on the clay by the planting body. Is a rear view showing the planting body opening / closing roller mechanism in a state where the planting body is open, FIG. 12 is a rear view showing the same in a closed state, and FIG. 13 is a scraper body during the ascending process of the planting body FIG. 14 is a side view showing the action preparation posture of the scraper means positioned between a pair of planting rods, and FIG. 14 is a side view showing a state where the scraper body is located between the pair of planting claws and receives a first cleaning action. 15 is a side view showing a state in which the scraper body is separated forward from between a pair of planting claws (non-action posture), and FIG. 16 is a raised position of the planting body in FIG. 13 and an action preparation posture of the scraper body. FIG. 17 is a side view showing the posture (lifting holding position) of the pressure suppression body at the timing when the planting claw is lowered to the bottom, and FIG. FIG. 19 is a side view showing a dropping posture of the pressure suppression body at the timing of the holding release posture of the seedling part by the planting claw, and FIG. 19 is a side view showing the rising start posture of the pressure suppression body.

  The overall configuration of the seedling transplanter 1 will be described.

  As shown in FIGS. 1 and 2, the seedling transplanting machine 1 is a walking type self-propelled working machine that automatically plants the seedling 100 in the cocoon while running along the cocoon. And a pair of left and right front wheels 2 and 2 and rear wheels 3 and 3, and a traveling machine body 4 positioned above the upper surface 18.

  Although the kind of seedling planted by the seedling transplanter 1 of the present invention is not limited, in the following embodiment, a sweet potato seedling which is a kind of the vine seedling 100 will be described as an example.

  The main frame of the traveling machine body 4 is configured by connecting and fixing a front engine frame 5 on which the engine 10 is mounted, a central transmission case 6 and a rear handle frame 7 in the front-rear direction. Various devices are supported on the main frame.

  The traveling machine body 4 includes, as the various devices, a saddle guide device 8, a front wheel support device 9, an engine 10, a rear wheel support device 11, the transmission case 6, a kite height detection device from the front to the rear in the traveling direction. 16, a seedling supply mechanism 12, a planting device 13, a pressure reducing device 14, and an operation operation unit 15 are provided.

  In these various devices, the device disposed on the front side of the mission case 6 is supported by the engine frame 5, and the device disposed on the rear side of the mission case 6 is supported by the handle frame 7.

  The cocoon guide device 8 is a device for guiding the traveling direction of the seedling transplanter 1 that travels along the cocoon, and a pair of heel guide rollers 8a and 8a for contacting the left and right side surfaces (slopes) of the cocoon. I have. By holding the cocoon between these cocoon guide rollers 8a, 8a or rolling while making contact with the inclined surface, the seedling transplanter 1 is driven in this state to control the direction of the seedling transplanter 1 by operating operation. It is possible to run along the ridge without doing.

  The front wheel support device 9 includes an upper front wheel support shaft 9a that is pivotably locked to the engine frame 5, and a front wheel arm 9b that is slidable in the axial direction of the upper front wheel support shaft 9a and supports each front wheel 2. 9b (see FIGS. 1 and 2).

  The rear wheel support device 11 has the same configuration as that of the front wheel support device 9, and slides in the axial direction of the rear wheel support shaft 11a and the rear wheel support shaft 11a that are rotatably locked to the transmission case 6. Chain cases 11b and 11b that support each rear wheel 3 freely are provided.

  The rear wheel support shaft 11a incorporates drive shafts for the rear wheels 3 and 3. The drive shafts are driven to rotate on the left and right via the chains in the chain case 11b. 3 is transmitted.

  The traveling machine body 4 can be adjusted in height position with respect to the front wheels 2, 2 and rear wheels 3, 3, that is, with respect to the heel surface 18, by the following configuration.

  As shown in FIGS. 1 and 2, the front wheel arm 9b and the chain case 11b are connected via a connecting shaft (not shown), and the front wheel arm 9b and the chain case 11b are configured as parallel links. Then, by rotating the front wheel arm 9b or the chain case 11b, the vertical height of the traveling machine body 4 with respect to the front wheels 2, 2 and the rear wheels 3, 3 is variable.

  In the embodiment, an actuator 19 is provided as a means for rotating the chain case 11b relative to the traveling machine body 4 to connect and contract the engine frame 5 and the chain case 11b. By extending and retracting the actuator 19, the traveling machine body 4 moves up and down with respect to the front wheels 2, 2 and the rear wheels 3, 3 through the operation of the parallel link.

  As shown in FIG. 1 and FIG. 2, the vertical movement of the traveling machine body 4 is performed based on the detection of the heel height by the heel height detection device 16. The heel height detection device 16 includes a sensor roller 16a that contacts the heel surface 18 and a sensor arm 16b that supports the sensor roller 16a and is provided rotatably on the engine frame 5.

  The inclination angle of the sensor arm 16b gives information on the separation distance between the engine frame 5 and the heel surface 18. In response to the tilting of the sensor arm 16b, the spool of the hydraulic valve is pushed and pulled to control the operation of the hydraulic actuator 19, and the separation distance between the engine frame 5 and the upper surface 18 is kept constant. The height position of the traveling machine body 4 is controlled so as to lean.

  Next, the seedling supply mechanism 12 will be described. As shown in FIGS. 1 and 2, the seedling supply mechanism 12 is configured separately from the main frame (the engine frame 5, the transmission case 6, and the handle frame 7) of the traveling machine body 4. It is possible to attach after assembling the main body. The seedling supply mechanism 12 is disposed behind the mission case 6 and above the handle frame 7.

  Power is transmitted from the PTO shaft 6a of the transmission case 6 to the seedling supply mechanism 12, and the PTO shaft 6a and an output shaft 81 (to be described later) are interlocked in the transmission case 6, that is, a conveyor belt. The drive of 21 and the planting apparatus 13 mentioned later interlock | cooperate, and it is comprised so that the conveyance belt 21 may be rotationally driven intermittently.

  The seedling supply mechanism 12 is configured to be supported by the main frame. However, the seedling supply mechanism 12 is configured to be removable only by releasing the connecting portion of the PTO shaft 6a. Easy. As shown in FIGS. 3 and 4, the seedling supply mechanism 12 appropriately places the seedlings 100 accommodated in a seedling accommodating case (not shown) at a predetermined interval, and conveys them to a seedling taking part 21d described later, This seedling collecting part 21d is a device that is picked up (gripped) by a pair of left and right planting bodies 20L, 20R provided in the planting device 13 and taken out.

  The seedling supply mechanism 12 is provided with a belt-like transport belt 21 that rotates clockwise in a rear view (FIG. 3). Specifically, as shown in FIGS. 3 and 4, the conveyor belt 21 includes an upper lateral feed portion 21a that feeds in one left-right direction on the upper side of the machine body, and a lower feed portion that feeds downward following the upper lateral feed portion 21a. 21b and an ascending feed portion 21c that feeds upward following the descending feed portion 21b and returns to the feed start end side of the upper lateral feed portion 21a, and is held in a substantially inverted triangle when viewed from the back.

  The upper lateral feed portion 21a that is the upper surface of the conveyor belt 21 is a placement portion that holds the seedling taken out from the seedling storage case. The boundary between the descending feed part 21b and the ascending feed part 21c is the lower end position of the transport belt 21, and is a seedling taking position (seedling taking part) 21d that takes over seedlings to the planting bodies 20L and 20R (see FIG. 3).

  On the outer periphery of the conveyor belt 21, a plurality of rectangular plate-like partition plates 21 e are formed in the front-rear direction of the conveyor belt 21 in the width direction (direction perpendicular to the conveyor direction) toward the outer periphery of the conveyor belt 21 made of a flat belt. Projected at regular intervals along the transport direction of the transport belt 21 so as to be parallel, the operator places the seedling 100 between the partition plates 21e, and the seedling stem portion 100a of the seedling 100 is placed. The holder portion 22 described later is held.

  Locking holes 21f are formed at regular intervals along the transport direction at the front and rear portions of the transport belt 21 in the width direction, and will be described later at the right end of the transport belt 21 (the right end of FIG. 3). Locking protrusions provided on the outer periphery of the conveyor belt drive pulleys 68 and 68 are inserted into the locking holes 21f (see FIG. 4).

  And the holder part 22 is provided in the rear end part (rear end side of the traveling machine body 4) in the direction orthogonal to the transport direction of the outer periphery of the transport belt 21 between the partition plates 21e. As shown in FIGS. 5 (a) and 5 (b), each holder portion 22 has a pair of elastic grips made of synthetic resin such as sponge inside an upward U-shaped frame 22a made of plastic or the like. The body 22b is fixedly configured. The pair of elastic gripping bodies 22b are arranged with a gap H1 so that the stem of the seedling 100 can be elastically gripped before and after the transport direction of the transport belt 21 (downstream side and upstream side). Further, the upper surface of each elastic gripping body 22b has an inclined surface that slopes downward toward the gap H1, and the seedling gripping portion of the elastic gripping body 22b has a convex curved surface in the width direction of the transport belt 21. Consideration is made so that the seedling stem 100a is not damaged when the operator inserts it for gripping. Each elastic gripping body 22b is formed in a hollow shape, so that the amount of elastic deformation of each elastic gripping body 22b can be increased, and even if the diameter of the seedling portion 100a is large or small, a pair of elastic gripping bodies 22b is formed. The range in which the seedling portion 100a can be reliably gripped by the gripping body 22b can be expanded.

  Furthermore, a guide body 27 is provided in a portion adjacent to the holder portion 22 and close to the side through which the planting bodies 20L and 20R pass, and a piece of the frame body 22a is erected upward, A guide groove 27a for guiding the seedling portion 100a communicating with the gap H1 is notched in the guide body 27, and the guide groove 27a is substantially Y-shaped with the insertion side extending upward in a V shape. Is formed. With this configuration, there is an effect that guidance when the seedling stem portion 100a of the vine seedling 100 is manually inserted into the holder portion 22 becomes easy.

  A plate-like cover body 58 for preventing the leaves of the vine seedling 100 and the seedling stem 100a from hanging down is disposed in the descending feed portion 21b from the right to the bottom along the outer periphery of the conveyor belt 21. (See FIG. 3). This is because the seedling 100a of the seedling 100 located between the adjacent partitions 21e in the descending feed part 21b is gripped (clamped) by the pair of elastic gripping bodies 22b of the holder part 22. This is for receiving and guiding the seedling 100 so that the leaf side does not hang and the seedling 100 is bent.

  In the seedling supply mechanism 12, a round bar-shaped guide rail 59 extending from the descending feed part (downward stroke) 21b of the conveyor belt 21 to the seedling removing part 21d is more seedling than the holder part 22 and the guide body 27. It is arrange | positioned at the protrusion side (site | part near the side which the planting bodies 20L and 20R pass) of the stem part 100a (refer FIG. 3). With this configuration, the seedling stem portion 100a gripped (held) by the holder portion 22 and the guide body 27 at the descending feed portion (downward stroke) 21b of the transport belt 21 hangs down due to gravity and bends, and the posture of the seedling 100 is disturbed. In addition, it is possible to prevent the seedling stem part 100a from being detached from the holder part 22, and to ensure the seedling taking over work by the planting bodies 20L and 20R at the seedling taking position (seedling removing part) 21d.

  Next, driving force transmission of the seedling supply mechanism 12 will be described. As shown in FIGS. 1, 2, and 3, the PTO shaft 6 a extends backward from the mission case 6. A gear 61 is fixed to the rear end portion of the PTO shaft 6a, and a sprocket 57 is fixed on a support shaft of the gear 62 that meshes with the gear 61. The sprocket 57 is driven to convey seedlings. One end of the chain 63 is wound. The rear end portion of the PTO shaft 6 a, the gears 61 and 62, and the front end portion of the support shaft on which the gear 62 and the sprocket 57 are attached are housed in a gear box 64.

  The other end of the seedling transport drive chain 63 is wound around a sprocket (not shown) that is loosely fitted to the transport belt drive shaft 60.

  In this embodiment, the driving force transmitted from the seedling transport drive chain 63 to the sprocket is transmitted to the transport belt drive shaft 60 via a one-way clutch with a one-way cam (not shown).

  When it is desired to rotate the transport belt 21 for several seedlings, for example, when it is desired to perform maintenance or idle feeding, it takes time to drive the engine 10 to drive the seedling supply mechanism 12 or to advance the transport belt 21. Although it is difficult to adjust the timing, the one-way clutch with a one-way cam is provided in this way, so that when the engine is stopped, the conveyor belt 21 is held in the conveying direction (in the direction of arrow A in FIG. 3). When it moves, the sprocket is stopped, but the conveyor belt 21 is rotated at every arrangement interval of the seedlings 100.

  In this way, since the conveyor belt 21 can be manually fed, the seedlings arranged on the conveyor belt 21 can be moved to the seedling-removing position without starting the engine 10 and turning the work switch “ON” to perform the idling operation. (Seedling part) Up to 21d can be sent. Further, even after the planting operation is finished and the engine 10 is stopped, the conveyor belt 21 can be manually sent, so that the seedling 100 remaining on the conveyor belt 21 can be easily removed without driving the planting device 13. .

  Next, the planting apparatus 13 is demonstrated using FIGS.

  The planting device 13 includes a pair of left and right planting bodies 20L and 20R, a planting body reciprocating mechanism 24 that reciprocates the planting bodies 20L and 20R from the seedling-taking position (seedling-taking part) 21d to the middle of the cage, and a cam It is comprised from the planting body opening / closing cam mechanism 40 of the known structure which opens and closes the planting bodies 20L and 20R by a mechanism. The well-known planting body opening / closing cam mechanism 40 is an application of the seedling extraction claw opening / closing mechanism disclosed in Japanese Patent Laid-Open No. 2001-103810, and will not be described in detail here.

  The planting bodies 20L and 20R are for transplanting the vine seedling 100 delivered from the seedling collection position (seedling collecting section) 21d of the seedling supply mechanism 12 into the cage, and open and close the left and right planting bodies 20L and 20R. Thus, the seedling stem 100a of the vine seedling 100 can be held and the held seedling 100 can be released.

  Each planted body 20L, 20R in the present invention has a planting claw 28 as a seedling clamping piece at its tip. That is, each planting body 20L, 20R includes a planting rod 29 formed into a symmetrical shape by bending a substantially metal round bar into a substantially L shape in a side view, and each planting rod 29 And a plate-like planting claw (gripping piece) 28 fixed to the lower end (tip) portion (see FIGS. 6A and 9).

  More specifically, as shown in FIGS. 6 (a) to 6 (c), the tip edge of each planting claw 28 has an acute-angled shape (laterally V-shaped, pointed shape) in the side view. The upper and lower parts of the tip edge of the blade part 28a are formed in the sectional shape of the blade part. Further, a notch recess 28c that opens downward is formed in the lower side 28b of the planting claw 28 along the lower side 28b so as to have a length L1 as appropriate.

  A trapezoidal blade body 28d having a downward-facing triangular triangle or a short lower side is integrally provided at a portion farthest from the rear end portion (the blade portion) 28a of the lower side 28b. The plate thickness H3 of the blade body 28d is formed to be slightly thinner than the plate thickness H2 of the planting claw 28.

  A distal end portion 29a of an appropriate length of the planting rod 29 is arranged along the lower side 28b on the outer surface of each planting claw 28, and the distal end portion 29a of the planting rod 29 has a notch recess 28c. It is fixed by welding or the like so as to cover from the outside (see FIGS. 6A and 6C).

  When the seedling portion 100a is sandwiched between the pair of planting claws 28 in a direction substantially parallel to the extending direction of the distal end portion 29a of the planting basket 29, the cross-sectional direction of the pair of planting claws 28 (FIG. 6 ( c)), on the lower side 28b side, a notch recess 28c that is substantially equal to the plate thickness H2 of the planting claw 28 is formed downwardly between the tip portion 29a and the seedling 100a. Therefore, when the pair of planting claws 28 enter (penetrate) into the upper surface 18 of the planting at the time of planting, if the dredged soil hits the lower surface of the seedling portion 100a in the left and right notched recess 28c, its acting force Thus, the seedling part 100a can be bent so that the seedling part 100a escapes in the direction of the notch recess 28c on either side. Moreover, the clay when entering the penetrating upper surface 18 (penetrating) can enter the left and right notched recesses 28c having a large volume. That is, even if a pair of planting claws 28 enter (penetrate) into the upper surface 18 of the seedling stalk 100a, a large impact force due to the dredged soil at the time of the collision (on the lower surface side of the stalk 100a) (Planting resistance force) does not act directly, so that the seedling stem 100a is crushed or broken at the boundary between the pair of planting claws 28 and the seedling stem 100a. (Damage) can be reduced.

  Further, as will be described later, the locus of the tips of the planting claws 28 of the planting bodies 20L and 20R is a crescent-shaped path (downward stroke R1 and upward stroke R2: two in FIG. Reciprocate along the dotted line). That is, the seedling 100 at the seedling-taking position (seedling-taking part) 21d located at the lower end of the conveyor belt 21 is sandwiched and gripped by the pair of planting claws 28 of the planting bodies 20L and 20R, and is in the cage. At the lowest position of the reciprocating motion, the planting claws 28 release the seedling 100, and the planted bodies 20L and 20R retreat upward, so that the seedling 100 is transplanted into the cage.

  And when the front-end | tip blade part 28a of a pair of planting nail | claw 28 plunges into the cocoon upper surface 18, it becomes easy to tear the multifilm MF laid in the said heel | bag upper surface 18 with the blade part 28a, and the seedling part 100a is made with the multifilm MF. The vine seedling 100 can be reliably planted in the dredged soil without being damaged.

  Further, when the tips of the planting claws 28 of the planted bodies 20L and 20R sink into the dredged soil in the shape of a ship bottom along the crescent-shaped path R (downward stroke R1), Since the multi-film MF can be torn (cut) in a streak shape by the blade body 28d positioned on the lower surface side at the base end side of the attaching claw 28, the multi-piercing is made by the blade portion 28a at the distal end portion of the planting claw 28. As a result of forming the cutting streak MF1 along the traveling direction of the traveling machine body in the multi-film MF on the advance side of the traveling machine body, which is connected to the upper surface hole of the film MF, from the position where the planting claws 28 enter the multi-film MF. The seedling stem portion 100a that enters the multifilm MF with a delay is not obstructed by the multifilm MF, and the branches and leaves of the vine seedling 100 at the time of planting can be smoothly extended to the upper surface side of the multifilm MF. Time An effect that can greatly reduce the damage to the vine seedlings 100. Moreover, after planting the seedling stem front end side of the vine seedling 100, when the planted bodies 20L, 20R rise along the ascending stroke R2 of the crescent-shaped path R, the location of the large cut muscle is placed in the planting nail 28. Therefore, the laying position of the multi-film MF is not shifted unnecessarily by hooking the multi-film MF.

  The blade body 28d and the cutout recess 28c may be provided only on one of the pair of left and right planting claws 28. Further, when the pair of planting claws 28 enters (penetrates) the upper surface 18 of the seedling stem 100a with the above-mentioned seedling stem 100a being sandwiched, it acts on both the left and right sides of the seedling stem 100a or one notch recess 28c. In order to release a large impact force caused by the dredged soil at the time of the collision and greatly reduce the planting resistance force, the notch recess 28 c may be penetrated through the outer surface of the planting claw 28. As an embodiment thereof, an escape hole 28e for communicating the notch recess 28c and the outer surface of the planting claw 28 is provided at a position above the distal end portion 29a of the planting basket 29.

  The planted body reciprocating mechanism 24 is a crank mechanism that converts the rotational motion of the planting drive shaft 25 into the reciprocating motion of the planted bodies 20L and 20R from the seedling supply mechanism 12 into the cocoon. The locus of the tips of the planting claws 28 of the planted bodies 20L and 20R is moved along the crescent-shaped outer peripheral path R (the two-dot chain line in FIG. Along the trajectory shown in the stop state).

  Then, the planting body support frame 31 opens and closes the planting bodies 20L and 20R and thus the pair of planting claws 28 in conjunction with the movement of the planting bodies 20L and 20R by the planting body reciprocating mechanism 24. A planting body opening / closing cam mechanism 40 is provided (see FIG. 7).

  Next, power transmission to the planting drive shaft 25 will be described. As shown in FIG. 7, in the seedling transplanter 1 of the present embodiment, the driving force from the engine 10 is transmitted to the planting device 13 by the transmission shaft 80 via the transmission case 6 and the handle frame 7. .

  That is, an output shaft 81 extends from the transmission case 6 to the left (right in FIG. 7), an output bevel gear 82 is fixed to the left end of the output shaft 81, and a front bevel gear 83 that meshes with the output bevel gear 82 is provided. The fixed transmission shaft 80 is inserted into a pipe frame 80a (see FIG. 8) of one traveling machine body 4, and a rear bevel gear 84 is fixed to the rear end of the transmission shaft 80 in a gear case. An input bevel gear 85 fixed to the left end portion of the planting drive shaft 25 is engaged with the rear bevel gear 84 to transmit the driving force of the engine 10 to the rear.

  As described above, since the drive transmission from the transmission case 6 to the planting device 13 is performed by shaft transmission via the bevel gears 82, 83, 84, 85, the driving force transmission to the planting drive shaft 25 is performed by the chain. Compared to the case, the operation of the planting device 13 can be performed quickly and smoothly.

  Next, the planting body opening / closing roller mechanism 90 will be described. As shown in FIGS. 11 and 12, the planting body opening / closing roller mechanism 90 is disposed at the lower end of the conveying belt 21 of the seedling supply mechanism 12, and only the planting body opening / closing cam mechanism 40 is used. Compared to the controlled case, the planting bodies 20L and 20R are more accurately closed at the seedling collection position (seedling section) 21d.

  That is, even if the planted body opening / closing roller mechanism 90 is not provided, the planted bodies 20L and 20R are rotated downward in the opened state, and the seedling position ( Although it is closed by the seedling removal part 21d, the opening / closing operation is performed on the base side of the planting bodies 20L and 20R. The force is weak and may become unstable.

  In the present embodiment, a pair of left and right rollers 23L and 23R are pivotally supported behind the seedling 100 conveyed to the seedling collection position (seedling collection unit) 21d at the lower end of the conveyance belt 21, and the rollers 23L, The planted bodies 20L and 20R that move up and down by the planted body reciprocating mechanism 24 pass between 23R from the top to the bottom. And roller 23L, 23R is arrange | positioned on both sides of the rotation locus | trajectory of the planting bodies 20L and 20R in the direct lower part of the seedling taking position (seedling collection part) 21d of the conveyed seedling 100, and the planting bodies 20L and 20R are arranged. Immediately after closing and clamping the seedling 100, the roller 23L is passed between 23R. Thus, the both sides of the planting bodies 20L and 20R are forcibly guided and closed by the rollers 23L and 23R, so that the seedling 100 is securely conveyed downward while being pinched. In addition, the space | interval of the clearance gap between the roller 23L and the roller 23R is made narrower than the outer width | variety when the planting bodies 20L and 20R are closed. As shown in FIG. 17, the initial positions of the rollers 23L and 23R (the positions of the rollers 23L and 23R not sandwiching the planting bodies 20L and 20R) are the pins formed on the side surfaces of the slide shafts 36L and 36R described later. Determined by position.

  Hereinafter, a method for supporting the pair of rollers 23L and 23R will be described. As shown in FIGS. 11 and 12, stays 32L and 32R are fixedly attached to the handle frames 7 and 7, the cylindrical supports 33L and 33R are supported by the stays 32L and 32R, and the cylindrical supports 33L and 33R are supported. The sliding cylinders 35L and 35R are supported. Sliding shafts 36L, 36R are slidably inserted into the sliding cylinders 35L, 35R, and bracket members 42L, 42R are provided at the ends of the sliding shafts 36L, 36R on the side close to the seedling taking part 21d. The rollers 23L and 23R are pivotally supported by the bracket members 42L and 42R. The rotation support shafts of the rollers 23L and 23R are arranged in parallel to the direction orthogonal to the transport direction of the transport belt 21. Further, elastic members 43L and 43R such as compression coil springs are disposed between the bracket members 42L and 42R and the cylinder supports 33L and 33R, and the sliding is caused by the restoring force of the elastic members 43L and 43R. The dynamic shafts 36L and 36R are biased in the direction of the seedling 100 (the left and right center directions of the planting bodies 20L and 20R).

  A guide body 92 having a substantially “U” shape when viewed from the front is fixed to the upper part of the left bracket member 42R. The guide body 92 is arranged on the open side of the seedling guide path 92b (in FIGS. 11 and 12) so that the seedling 100 conveyed to the seedling picking position 21d is easily sandwiched between the seedling guide paths 92b of the guide body 92. The right side) is formed wide. Here, the guide body 92 is preferably formed of a round bar having elasticity, and is preferably formed of, for example, a piano wire.

  A planting body opening spring 93 made of a tension spring is disposed between the upper ends of the planting bodies 20L and 20R, and the planting body opening spring 93 opens the lower side of the planting bodies 20L and 20R. Is biased in the direction.

  Then, when the planting bodies 20L and 20R whose lower portions are in the open state descend to the seedling-taking position 21d and enter between the rollers 23L and 23R, the rollers 23L resist the restoring force of the elastic members 43L and 43R. , 23R is pushed away. In conjunction with the movement of the rollers 23L, 23R, the sliding shafts 36L, 36R in the sliding cylinders 35L, 35R slide in the direction of the anti-seedling 100 so that the planted bodies 20L, 20R can pass therethrough. , 23R increases. Depending on the load of the elastic members 43L and 43R and the gap between the rollers 23L and 23R, the load at which the planting bodies 20L and 20R sandwich the seedling 100 is made appropriate.

  In this way, the seedling 100 is transported to the vicinity of the planting device 13 by the seedling supply mechanism 12, and the stem ends are grasped by the pair of left and right planting bodies 20L and 20R to perform seedling harvesting, and the planting body reciprocating mechanism 24 In the seedling transplanting machine 1 that performs the planting operation of the seedling 100 by swinging the planted bodies 20L and 20R vertically and entering the field, a pair of left and right rollers 23L below the seedling picking position 21d, 23R is provided, and the planted bodies 20L and 20R pass between the rollers 23L and 23R. Therefore, even if the planted bodies 20L and 20R swing up and down at high speed, the left and right planted bodies When the seedling 100 is present at the lower part of 20L and 20R, the seedling 100 can be sandwiched by closing the planting bodies 20L and 20R in a timely manner.

  That is, in order to prevent the planting bodies 20L and 20R from being bent, it is not necessary to excessively increase the rigidity of the planting bodies 20L and 20R or adopt a special material and structure.

  In addition, since the guide body 92 that guides the stem end portion of the seedling 100 is provided above the roller 23L on the downstream side in the transport direction, the stem end portion of the seedling 100 is a pair of tips at the tips of the left and right planting bodies 20L and 20R. It becomes easy to be guided between the planting claws 28, and the lower parts of the planted bodies 20 </ b> L and 20 </ b> R can easily hold the seedling stem end portion 100 a of the seedling 100. That is, even if the seedling stem end portion 100a of the seedling 100 is bent, it can play a role of correcting such bending.

  The planted body reciprocating mechanism 24 is provided with a planted body opening / closing cam mechanism 40. While the planted bodies 20L, 20R pass between the rollers 23L, 23R, the planted body opening / closing cam mechanism 40 allows the planted body 20L, Since 20R is configured to be closed, the planted bodies 20L and 20R can be held in a closed state even after the planted bodies 20L and 20R have passed between the rollers 23L and 23R.

  Further, since the planting bodies 20L and 20R are urged by the elastic member 93 in the direction in which the distal ends of the planting bodies 20L and 20R open, the planting body opening / closing roller mechanism 90 and the planting body opening / closing cam mechanism 40 plant the planting bodies 20L and 20R. When the closed state of the appendages 20L and 20R is released, the planted bodies 20L and 20R are automatically opened by the elastic member 93, and the seedling 100 can be released.

Next, referring to FIGS. 8 and 13 to 15, the interlocking mechanism of the scraper means 38 for cleaning the inner surfaces of the pair of planting claws 28 in the pair of planted bodies 20L and 20R and the planted bodies 20L and 20R. The interlocking (synchronization) timing of the raising / lowering operation and the posture change of the scraper body 38b in the scraper means 38 will be described.

  As shown in FIGS. 8 and 13, the scraper means 38 is disposed on the side of the planting bodies 20L and 20R in a plan view and a side view, and includes a support arm 38a and a rubber plate attached thereto. And a scraper body 38b having flexibility, a bell crank link 44a, a first link 44b, a second link 44c, and a cam means 45. A rotating cam plate 45 a in the cam means 45 is attached so as to rotate integrally with the drive shaft 25 disposed near the one handle frame 7.

  The second link 44c and the bell crank link 44a are connected to each other via a first link 44b having a turnbuckle capable of adjusting the length, and an L-shaped support arm in a plan view is attached to the tip of the bell crank link 44a. 38a is fixed. In a plan view (see FIG. 8), the scraper body 38b fixed to the upper surface on the distal end side of the support arm 38a is set so as to be positioned between the inner surfaces of the pair of planting claws 28.

  A lateral first shaft 76 fixed to the support frame 7a on the one handle frame 7 side is pivotally supported by an L-shaped second link 44c in a side view so as to be fixed to the support frame 7a. A side view L-shaped bell crank link 44a is pivotally supported by the biaxial shaft 77. A free rotating roller type cam follower 45b in the cam means 45 is pivotally supported on the second link 44c. In addition, one end of the tension spring 46 as an urging means is locked to the second link 44c, the other end is locked to the support frame 7a, and the cam follower 45b is located in the radial inner direction (arrow B direction) of the rotating cam plate 45a. The second link 44c is urged so as to head toward. The cam follower 45b can be slidably contacted with the outer peripheral end surface of the rotating cam plate 45a.

  The drive shaft 25 rotates counterclockwise in synchronization with the vertical reciprocation of the planting bodies 20L and 20R (see FIGS. 9 and 13 to 19). When the cam follower 45b is in sliding contact with the circumferential surface 45a1 of the maximum radius of the rotating cam plate 45a (see the state of FIGS. 15 and 17), the tip of the second link 44c faces upward against the urging force of the tension spring 46. 15, the bell crank link 44 a is rotated clockwise in FIG. 15 via the first link 44 b, and the support arm 38 a with the scraper body 38 b is connected to the pair of planting rods 29 (planting claws 29). 28) is changed to a posture that is farther away from the front of the traveling aircraft than during 28). On the other hand, when the cam follower 45b is positioned in the region of the substantially L-shaped notch 45a2 in the side view of the rotating cam plate 45a (see FIGS. 13 and 14), the second link 44c biased by the tension spring 46 is By rotating counterclockwise, the bell crank link 44a rotates counterclockwise in FIG. 13 via the first link 44b, and the scraper body 38b is held at a position between the pair of planting rods 29. The In order to maintain this position, as shown by a two-dot chain line in FIGS. 13 and 14 and as shown by a solid line in FIG. 8, a bell crank link 44a is attached to a substantially L-shaped stopper body 47 in plan view protruding from the support frame 7a. The bell crank link 44a does not rotate clockwise any further. The cam follower 45b is not in sliding contact with the rotating cam plate 25 in the notch 45a2.

  In addition, in a state where the scraper body 38b is held at a position between the pair of planting rods 29 in the opened state, the pair of planting rods 29 of the planting bodies 20L and 20R (return ) As it turns upward in the latter half of the ascending stroke, the mud soil is dropped by rubbing the inner surface of the upper half from the proximal end side of the pair of planting claws 28 to the distal end at the left and right side edges of the scraper body 38b. (Refer to the first cleaning action, the state of FIG. 14).

  Then, when the pair of planting claws 28 is just before or reaches the uppermost position (see the state of FIG. 15, corresponding to the posture of FIG. 9), the cam follower 45b is located at the end of the notch 45a2 (radius The second link 44c rapidly rotates clockwise since it quickly moves to the position of the circumferential surface 45a1 of the maximum radius of the rotating cam plate 45a after sliding on the sliding contact portion in the direction. As a result, the bell crank link 44a also rapidly rotates clockwise, so that the scraper body 38b rotates in the forward direction so as to come out from the tip portions (blade edge portions) 28a of the pair of planting claws 28 (see FIG. 15). As shown in the direction of arrow C), mud soil in the lower half of the inner surface of the planting claw 28 and scraps of the multifilm MF that is caught can be scraped off (second cleaning action, see FIG. 15).

  In this way, the side edges of the scraper body 38b are in sliding contact with the inner surfaces of the pair of planting claws 28 during the latter half of the ascent process after planting the vine seedling 100 with the planted bodies 20L and 20R. The mud and the multifilm MF debris adhering to the inner surface of the MF can be reliably removed, and the next seedling holding operation can be performed reliably and stably. Since the common drive shaft 25 is driven in synchronism with the rotation of the interlocking mechanism of the scraper means 38 and the reciprocating mechanism of the planting bodies 20L and 20R, the structure is simplified and the manufacturing cost can be reduced. .

  Thereafter, while the interval between the pair of planting claws 28 is narrowed, the seedling stalk portion 100a of the vine seedling is grasped by the pair of planting claws 28 and moved to the planting position as described above. In this way, the scraper body 38b in the scraper means 38 is interlocked (synchronized) with the movement of the pair of planting claws 28 up and down, and is positioned between the inner surfaces of the pair of planting claws 28 in the latter half of the ascending stroke. The scraper body 38b is interlocked so as to be spaced forward and upward from the pair of planting claws 28 during the descending stroke from the uppermost position and in the start region (first half) after the planting. At the time of grasping (holding) the seedling stalk portion 100a by the nail 28 or planting to the clay, the scraper body 38b does not get in the way, and the planted seedling is not damaged.

  The suppressor 14 that suppresses the planting location after planting the seedling 100 suppresses the upper surface 18 into which the planting bodies 20L and 20R are inserted, and breaks the planting holes formed by the planting bodies 20L and 20R. The seedling 100 is configured to be securely held in the cocoon. The pressure-reducing device 14 has a pressure-reducing body 37 having a flat surface that is brought into contact with the upper surface 18 by gravity, and the pressure-reducing body 37 is interlocked (synchronized with the transplanting of seedlings by the planting bodies 20L and 20R and the movement of the scraper means 38) And a cam-type pressure-reducing drive mechanism 78 that moves up and down (see FIGS. 16 to 19).

  The suppression body 37 has a moderate weight and can block the planting holes formed by the planting bodies 20L and 20R without breaking the multi-film MF when falling on the upper surface 18 by its own weight. And a metal body having an area of a horizontal lower surface (flat surface) 37a. A pipe-shaped basic arm 79a whose base end is pivotally attached to the support frame 7a via a horizontal shaft 79c so as to be pivotable up and down is located on the rear side of the traveling machine body relative to the lifting locus R and the lifting link mechanism of the planting bodies 20L and 20R. It extends to. A pressure-reducing body 37 is pivotally supported via a horizontal shaft 79d at the lower end of a downward L-shaped suspension arm 79b that is inserted into the rear end of the base arm 79a so as to be extendable and can be held with a bolt or the like. Yes. The base arm 79a or the suspension arm 79b is connected to the handle frame 7 or the like via an elastic suspension support 80 such as a coil spring.

  The pressure-reducing body 37 is located on the rear side of the traveling body with respect to the lifting link mechanism and the lifting locus R of the planting bodies 20L and 20R.

  A rotatable roller-like cam follower 81 is provided on the lower surface of the middle portion of the foundation arm 79a in the front-rear direction. The cam follower 81 is always in sliding contact with the outer peripheral surface of the rotating cam plate 45a as the cam means by the weight of the pressure-reducing body 37. It arrange | positions possible (refer FIGS. 16-19).

  Accordingly, when the drive shaft 25 rotates counterclockwise in synchronization with the vertical reciprocating swinging motion of the planting bodies 20L and 20R, the cam follower 81 is in sliding contact with the circumferential surface 45a1 having the maximum radius of the rotating cam plate 45a. When it is on (see the states of FIGS. 15, 16, and 17), the foundation arm 79a is pulled up so that the pressure-reducing body 37 is at the uppermost position. This process is in the latter half of the ascending process of the planting bodies 20L and 20R after the planting of the vine seedling 100, and the scraper body 38b is located between the pair of planting rods 29. Further, the pressure suppressor 37 is held at the uppermost position from the state immediately before the pair of planting claws 28 are at the uppermost position to the uppermost position even during the lowering process and the planting operation (see FIG. 17) (see FIG. 15). .

  As shown in FIG. 18, immediately after planting the vine seedling 100 by the planting bodies 20L and 20R, when the pair of planting claws 28 release the pinching of the seedling stem 100a and start the ascent process, the cam follower When 81 comes to the notch 45a2 of the rotating cam plate 45a, it falls to the upper surface 18 by the weight of the pressure member 37, and the soil above the seedling 100a buried in the dredged soil is hit from above the multi-film MF. Therefore, the voids in the dredged soil through which the pair of planting claws 28 have passed can be filled substantially uniformly, and the rooting after transplanting the vine seedling 100 becomes good.

  Next, when the cam follower 81 moves from the notch portion 45a2 of the rotating cam plate 45a to the circumferential surface 45a1 as the pair of planting claws 28 are lifted from the upper surface 18 (see FIG. 19), the foundation The arm 79a and thus the pressure-reducing body 37 are pulled up, and in synchronization (synchronization) with this, the scraper body 38b descends and is positioned between the pair of planting rods 29.

  As described above, since it further includes a pressing means provided with a pressure-reducing body (pressing body) 37 that presses against the heel surface (upper surface) 18 in synchronization with the planting cycle of the pair of planting bodies 20L and 20R, Only after planting with the pair of planted bodies 20L and 20R, the pressure body 37 falls on the top surface of the heel, and during the other strokes, the pressure body 37 is in the raised position. The pressure suppressing surface 37 does not squeeze the soil indefinitely, and the pressure suppressing surface 37 does not dent in an arc shape as in the case of a conventional roller-shaped pressure suppressing member. ) 37a is formed on a flat surface, so that the upper surface 18 of the planting site can be pressed evenly over a wide range, and the rooting after transplanting the seedling 100 becomes good.

It is a whole side view showing the seedling transplanting machine which is one example of the present invention. It is also a plan view. It is a rear view of a seedling supply mechanism. It is also a plan view. (A) is a top view of the holder part which holds a seedling stem part, (b) is also a rear view. (A) is a side view of the state in which the seedling is sandwiched between planting claws, (b) is a view taken along the line VIb-VIb in FIG. 6 (a), and (c) is VIc− in FIG. 6 (a). FIG. 6 is a rear view showing the periphery of the engagement pin taken along line VIc. It is a top view which shows the power transmission to a planting drive shaft. It is a top view of the synchronous drive part of a scraper means and a pressure suppression means. It is a side view which shows a planting body reciprocation mechanism. It is a side view which shows the planting state to the clay by a planting body. It is a rear view which shows the planting body opening-and-closing roller mechanism in the state where the planting body opened. It is a rear view which similarly shows the closed state. It is a side view which shows the action preparation attitude | position of the scraper means in which a scraper body is located between a pair of planting rods during the raising process of a planting body. It is a side view which shows the state which a scraper body is located between a pair of planting claws, and receives a 1st cleaning action. It is a side view which shows the state (non-action attitude | position) which the scraper body separated forward from between a pair of planting claws. It is a side view which shows the attitude | position (rise holding position) of the suppression body in the timing corresponding to the raising position of the planting body of FIG. 13, and the action preparation attitude | position of a scraper body. It is a side view which shows the attitude | position (rise holding position) of the suppression body in the timing which the planting nail | claw descend | falls to the lowest. It is a side view which shows the fall attitude | position of the suppression body in the timing of the holding | grip cancellation | release attitude | position of the seedling part by a planting nail | claw. It is a side view which shows the raising start posture of a suppression body.

DESCRIPTION OF SYMBOLS 1 Seedling transplanter 12 Seedling supply mechanism 20L, 20R Planted body 22 Holder part 22a Frame body 22b Elastic gripping body 23L, 23R Roller 27 Guide body 27a Guide groove 28 Planting claw 28a Cutlery part 28c Notch recess 28d Blade body 29 Planting basket 29a Tip 100 Vine seedling 100a Seedling stem

Claims (1)

Seedling transported up to the vicinity of the planting device 13 by seedling supply mechanism 12 performs seedling taking grab the stems ends of seedlings by a pair of planting claw 28, the pair of planting by planting body reciprocating mechanism 24 In a seedling transplanting machine for performing seedling planting work by causing the claw 28 to enter the field,
Comprising a scraper member 38b for wiping a pair of planting claw 28, the scraper member 38b is sliding on the inner surface of the pair of the planting claw 28 during the return upstroke after planting of the pair of planting claw 28 It is a structure that is driven via an interlocking mechanism that changes to a posture that contacts and a posture that is separated from the pair of planting claws 28 at a time other than the return raising stroke ,
The interlocking mechanism includes a cam plate 45a that rotates integrally with the drive shaft 25 of the planting body reciprocating mechanism 24, and a crank link 44a that is pivotally supported by the frame 7a of the traveling machine body 4 via a first link 44b. A second link 44c to be connected; a cam follower 45b provided on the second link 44c; and a spring 46 for holding the scraper body 38b in a posture entering between the pair of planting claws 28.
As the pair of planting rods 29 rotate upward during the return stroke after seedling planting, the scraper body 38b rubs the inner surface of the upper half from the base end side of the pair of planting claws 28, and the pair of planting claws 28 When the second link 44c and the crank link 44a are rapidly rotated by the cam plate 45a, the inner surface of the lower half of the pair of planting claws 28 is moved by the scraper body 38b. A seedling transplanter configured to rub .

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