JP2008067659A - Seedling transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that a work for setting a seedling stem portion to a holding portion is difficult, because the seedling stem portion 100a of a vine seedling 100 is soft and weak and is often curved, and a problem that the nipped (held) posture of the seedling stem portion is not stable, is especially easily changeable in a downward conveying portion during the conveyance of the seedling with an endless conveyance belt, and is liable to miss the taking of the seedling with planting tines in a seedling takout portion, and the like. <P>SOLUTION: Holder portions 22 for holding seedling stem portions are disposed on a conveyance belt 21 at a proper distance along a conveyance direction. Each of the holder portions 22 comprises a pair of elastic synthetic resin holders 22b placed back and forth in the conveyance direction. A pair of the elastic synthetic resin holders 22b are formed in convex curved shapes in which sites for holding a seedling stem portion face each other. A guide member 27 for guiding the seedling stem portion is disposed on a plant-passing side adjacent to the holder portions, and a Y-shaped guide groove 27a is formed in the guide member 27. <P>COPYRIGHT: (C)2008,JPO&INPIT

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 the seedling supply mechanism, the stem ends are gripped by the planting claws, the planting nails are swung up and down, A seedling transplanter that performs planting work by causing the tip to enter the field is known (see, for example, Patent Documents 1 and 2).

  The planting claw is configured to open and close by a cam mechanism of a planting drive arm that is interlocked with the vertical swinging of the planting claw. Moreover, in the field which covered the multi film, in order to shorten the distance which a planting nail tears a multi film at the time of a planting operation, it was comprised so that the locus | trajectory of a planting nail might become low before and after.

  In addition, as a seedling supply mechanism for supplying vine seedlings, in Patent Document 2, the seedling is arranged on one side edge portion orthogonal to the seedling transport direction in an endless transport belt provided with seedling storage portions at predetermined intervals in the seedling transport direction. A gripping part (holder part) for gripping or pinching the base part of the vine seedling (base part of the stem) is provided for each housing part. By winding this endless transport belt around one drive rotator and at least two driven rotators, the left and right direction of the traveling machine body in a substantially horizontal state on the upper side of the traveling machine body in a front view of the traveling machine body (Horizontal direction) an upper horizontal conveyance unit that conveys seedlings to one side, a lowering conveyance unit that extends from the end of the upper horizontal conveyance unit to the seedling extraction unit at the lower end of the traveling machine, and the start end of the upper horizontal conveyance unit from the seedling extraction unit And the ascending conveyance section.

The gripping (clamping) part (holder) that grips (clamps) the base of the seedling stalk includes a pair of clamping members of an upstream seedling clamping member and a downstream seedling clamping member in the seedling transport direction, and an upstream seedling The sandwiching member is composed of a brush body with the hair tips directed toward the downstream seedling sandwiching member, and the downstream seedling sandwiching member is composed of an elastic member such as a sponge. The base was pushed in and held.
JP 2004-24076 A JP 2005-341833 A

  However, as in the prior art, if the one is a brush body and the other is an elastic member such as a sponge, and only the seedling clamping member, the base of the vine seedling stalk is soft and bent Because there are many cases, it is difficult to set the base of the seedling stem to the gripping (holding) part (holder part), the holding (grip) posture of the base of the seedling is not stable, and endless transport During the seedling transport by the belt, the gripping posture of the seedling is easy to change, especially in the descending transport section, and there is a possibility that a seedling picking error by the planting claw in the seedling picking section may occur.

  The present invention has been made in order to solve the above-mentioned problem, and by devising the configuration of the holder part of the base part of the seedling stem, the ease of setting work of the base part of the seedling stem and the vine seedling set It is an object of the present invention to provide a seedling transplanting machine that can stabilize the posture of the plant.

  In order to achieve the above object, the invention according to claim 1 of the present invention conveys a vine seedling to the vicinity of the planting device by the seedling supply mechanism, and grasps the stem end portion of the vine seedling with a pair of right and left planted bodies. In the seedling transplanting machine for planting vine seedlings by swinging the planted body up and down by a planted body reciprocating mechanism and entering the field, the seedling supply mechanism is endless. A holder portion for holding the seedling portion at an appropriate interval along the conveyance direction, and the holder portion is positioned before and after the conveyance direction. The pair of elastic grip bodies are formed on convex curved surfaces where the portions for gripping the seedlings face each other.

  According to a second aspect of the present invention, in the seedling transplanting machine according to the first aspect, a guide body for guiding the seedling stem portion is provided on a side where the planted body passes adjacent to the holder portion. It is what.

  According to a third aspect of the present invention, in the seedling transplanter according to the first or second aspect, each of the elastic grippers is hollow.

  According to a fourth aspect of the present invention, in the seedling transplanter according to the second or third aspect, an insertion side of a guide groove for guiding a stem portion of the seedling is formed in the guide body in a substantially V shape. It is what.

  The invention according to claim 5 is the seedling transplanting machine according to claim 2 or 3, wherein the guide rail extending from the descending stroke of the transport belt in the seedling supply mechanism to the seedling removing portion is It is arrange | positioned rather than the said holder part and guide body at the protrusion side of the said seedling stem part.

  In the first aspect of the present invention, the endless transport belt is provided with a holder portion that holds the seedling portion at an appropriate interval along the transport direction, and the holder portion is arranged in front and rear in the transport direction ( It is composed of a pair of synthetic resin-made elastic grippers located on the upstream side and the downstream side. It is preferable that this holder part is the vicinity of the one side edge along the conveyance direction in a conveyance belt, and the side edge side near the seedling taking-out side by a planting body. By configuring the holder part with a pair of elastic gripping bodies made of synthetic resin in this way, the gripping force is stronger and the gripping surface is smoother than when the conventional one is configured with a brush body. As a result, the gripped seedling is not damaged and the posture is stabilized. In addition, since the pair of elastic grippers are formed on the convex curved surfaces where the portions for gripping the seedling stems face each other, the effect of not easily damaging the seedling stems can be achieved.

  In invention of Claim 2, since the guide body which guides the said seedling stem part is provided in the side which the said planting body passes adjacent to the said holder part, the said holder part and In cooperation with the guide body, the posture of the seedling stem part being conveyed is further stabilized.

  In the invention according to claim 3, since each elastic gripper in the holder portion is hollow, the amount of elastic deformation of the elastic gripper increases, so even if the diameter of the seedling stalk is large or small, it is ensured The grippable range is widened and adaptability is improved.

  In the invention according to claim 4, since the guide body is formed such that the insertion side of the guide groove for guiding the stem portion of the seedling is substantially V-shaped, the seedling stem is formed in the holder portion. There is an effect that guidance when the part is manually inserted becomes easy.

  In the invention according to claim 5, the guide rail extending from the lowering process of the conveying belt to the seedling removing part in the seedling supply mechanism is more preferably the seedling stem part than the holder part and the guide body. It is arrange | positioned at the protrusion side. That is, a guide rail for guiding the seedling stalk is provided on the side where the planted body passes adjacent to the holder part and the guide body. Can be prevented, and the stalk part can be prevented from being detached from the holder part and the guide body.

  Next, embodiments of the invention will be described. 1 is an overall side view showing a seedling transplanter according to an embodiment of the present invention, FIG. 2 is a plan view, FIG. 3 is a front view showing a lower part of a traveling machine body, and FIG. 4 is a side view showing a manual left / right tilt control device. 5 is a plan view, FIG. 6 is a rear view showing the periphery of the engaging pin, FIG. 7 is a rear view of the seedling supply mechanism, FIG. 8 is a plan view, and FIG. 9B is a rear view, FIG. 10 is a perspective view, FIG. 11A is a perspective view of a lowering portion of the conveyance belt in the seedling supply mechanism, and FIG. 11B is a conveyance belt. FIG. 12 is a plan sectional view showing the periphery of the conveyor belt drive shaft, FIG. 13 is a front sectional view showing a one-way clutch, and FIG. 14 shows a planting reciprocating mechanism 24. FIG. 15 is a plan view showing power transmission to the planting drive shaft, and FIG. 16 is a planted body in a state where the planted body is opened. Rear view of a closed roller mechanism, FIG. 17 is a rear view showing the same closed.

  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 to 3).

  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.

  Here, the support structure of the front wheels 2 and 2 will be described.

  As shown in FIG. 3, the front wheels 2, 2 are supported by the traveling machine body 4 by the front wheel support devices 9, 9, and the front wheels 2 a of the front wheels 2, 2 are open upward with respect to the traveling direction. It is supported. That is, the front wheels 2 and 2 are supported while maintaining a constant camber angle from the vertical direction. In the seedling transplanter 1 of this embodiment, a lower front wheel support shaft 46 as shown in FIG. 3 is pivotally supported at the lower end of each front wheel arm 9b, and a front wheel is loosely fitted on the lower front wheel support shaft 46. ing.

  As shown in FIG. 3, the lower front wheel support shaft 46 is formed to be bent in a reverse “h” shape when viewed from the front, and a horizontal portion 46 a that is rotatably supported by the lower end of the front wheel arm 9 b on the airframe side. It consists of the inclined part 46b which supports the front wheel 2 rotatably. A horizontal portion 46a of the lower front wheel support shaft 46 is pivotally supported by the lower end of the front wheel arm 9b so as to be rotatable in the horizontal direction, and an inclined portion 46b is bent upward from the lower end of the front wheel arm 9b and protrudes upward. . The front wheel 2 is loosely fitted to the inclined portion 46b, and is supported so that the upper side of the front wheel 2 opens outward. The lower front wheel support shaft 46 is fitted and fixed with a restricting member 47 that supports the inclined portion 46b so that it is always bent upward. The regulating member 47 includes a first support member 47a formed by bending the plate into a generally U shape when viewed from the front, and an outer side surface of the first support member 47a (running vehicle body 4). It is comprised from the 2nd support member 47b fixedly provided by the inner surface.

  In this way, the lower front wheel support shaft 46 is formed in a reverse “h” shape when viewed from the front, and is rotatable with respect to the front wheel support device 9, so that the front wheel arm can be changed to change the height of the traveling machine body 4. Even when 9b is rotated up and down, the horizontal part 46a is pushed downward by the weight of the machine body, so that the inclined part 46b always inclines upward by the reaction force of the front wheel 2, and the camber angle changes and the toe-in angle simultaneously. Will not change. That is, conventionally, the lower front wheel support shaft 46 is fixed to the front wheel arm 9b so as to have a camber angle to support the front wheel 2. When the front wheel arm 9b is turned up and down, the camber angle changes. In addition, the toe-in angle also changes, but by configuring as in the present embodiment, the inclined portion 46b is directed upward by the dead weight of the seedling transplanter 1, that is, the position where the camber angle is maximized. In addition, the lower front wheel support shaft 46 automatically rotates. Since the toe-in angle of the front wheels 2 and 2 does not change and the camber angle also does not change, the seedling transplanter 1 travels along the ridge groove without the front wheels 2 and 2 cutting the heel slope.

  Further, since the upper plate 47c and the lower plate 47d serving as stoppers are attached to the lower front wheel support shaft 46, the lower front wheel support shaft 46 is moved by the weight of the front wheel 2 even when the front wheel 2 is lifted or lifted. Even if the inclined portion 46b tries to rotate downward by rotating with respect to the arm 9b, the upper plate 47c or the lower plate 47d abuts against the front wheel arm 9b, so that only a predetermined angle can be rotated. The camber angle is not negative and the front wheel 2 is not aligned correctly when the front wheel 2 is lifted and re-installed when the seedling transplanter 1 is turned, or when the field resistance acts on the front wheel 2 greatly. And no discomfort due to the fulcrum being exceeded when the front wheels 2 and 2 are installed. In addition, since the front wheels 2 and 2 are held open, it is possible to prevent the front wheels from breaking the multi-film covering the upper surface 18.

  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 manual left / right tilt control device 49 of the seedling transplanter 1 will be described.

  The right and left inclination of the seedling transplanter 1 is performed by rotating the left and right chain case 11b and the front wheel arm 9b by an actuator (not shown) arranged separately from the actuator 19 on the left and right sides of the traveling machine body 4. Is. In this embodiment, the power obtained by the engine 10 is transmitted to the actuator via a hydraulic pump and a hydraulic valve (not shown), and the sliding of the spool 51 for switching the hydraulic valve is manually performed. By doing so, the left-right inclination control of the traveling machine body 4 is performed.

  As shown in FIGS. 4 to 6, the hydraulic valve housed in the hydraulic unit 26 is disposed so that the upper end portion of the spool 51 protrudes from the upper surface of the rear portion of the hydraulic unit 26. An attachment piece 52 is fixed to the upper portion of the spool 51, and an engagement pin 53 is fixed to the attachment piece 52 toward the front.

  A support member 54 formed in a C shape in a plan view is erected on the front portion of the upper surface of the hydraulic unit 26, and a long hole 54 b is formed in the vertical direction on the rear wall of the support member 54. A fan-like plate-like member 50 in a rear view is pivotally supported behind the support member 54. Specifically, a fan-shaped central portion of the plate-like member 50 is attached to a control rod 55, which will be described later, at the upper back of the support member 54. Is fixed.

  The control rod 55 is pivotally supported on the upper part of the support member 54, and extends from the support member 54 to the rear of the seedling supply mechanism 12. The control rod 55 has an operation lever 56 fixed at the rear, and the upper portion of the plate-like member 50 is fixed at the front by welding or the like. That is, when the operator rotates the operation lever 56 with respect to the support member 54, the fan-shaped plate-like member 50 rotates in conjunction with the control rod 55.

  As shown in FIG. 6, the plate-like member 50 is formed in a substantially fan shape, and an arcuate arc long hole 50b is formed in the lower part. The arc long hole 50 b is formed so that the center position of the arc is located to the right of the rotation center of the plate-like member 50 and the control rod 55. That is, when the plate-shaped member 50 is rotated around the control rod 55, the radial distance between the control rod 55 and the circular arc long hole 50b is configured to change gradually or long. The engaging pin 53 is inserted into the long hole 54b and the circular arc long hole 50b.

  Therefore, when the plate-like member 50 is rotated about the control rod 55, the engaging pin 53 is guided by the arc long hole 50b and the long hole 54b and moves in the vertical direction.

  With this configuration, when an operator working behind the seedling supply mechanism 12 rotates the operation lever 56 clockwise as viewed from the back, the plate-like member 50 rotates clockwise. As a result, the engaging pin 53 descends along the long hole 54b and the circular arc long hole 50b. As a result, the spool 51 slides downward to switch a hydraulic valve (not shown), and the traveling machine body 4 is left and right. Inclined in the direction. Conversely, when the operator rotates the operation lever 56 counterclockwise as viewed from the back, the plate-like member 50 rotates counterclockwise, and the engagement pin 53 moves along the long hole 54b and the circular arc long hole 50b. As a result, the spool 51 slides upward and the hydraulic valve (not shown) is switched, and the traveling machine body 4 is tilted in the left and right directions by the actuator.

  As described above, the manual left / right tilt control device 49 of the present embodiment has the operation lever 56 disposed behind the seedling supply mechanism 12, so that the operator can place the seedling 100 on the transport belt 21 during operation. When the traveling machine body 4 is moving, the right and left tilt control of the traveling machine body 4 can be easily performed. Further, as described above, since the manual left / right tilt control device 49 has a simple structure, trouble is unlikely to occur.

  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. 12 and 13, the seedling supply mechanism 12 appropriately places the seedlings 100 accommodated in a seedling accommodation case (not shown) at a predetermined interval, and conveys them to a seedling collecting unit 21d described later, This seedling part 21d is a device that is sandwiched and taken out by a pair of left and right planting bodies 20L, 20R provided in the planting device 13.

  The seedling supply mechanism 12 is provided with a belt-like transport belt 21 that rotates clockwise in a rear view (FIG. 7). Specifically, as shown in FIGS. 7 and 8, the conveyor belt 21 includes an upper lateral feed portion 21a that feeds in the left and right direction on the upper side of the machine body, and a downward 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 conveyor belt 21, and is a seedling taking position (seedling taking part) 21d that takes over seedlings to the planting bodies 20L and 20R (FIGS. 7 and 12). And FIG. 13).

  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. 7). A locking projection 68b provided on the outer periphery of the conveyor belt drive pulleys 68 and 68 is inserted into the locking hole 21f.

  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 FIG. 9A, FIG. 9B, and FIG. 10, each holder portion 22 is a pair of plastic and other upward-shaped U-shaped frames 22a made of synthetic resin such as sponge. The elastic gripping 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. In these cases, the upper surface of each elastic gripping body 22b is at least a closed hollow shape. For example, the portion facing the vertical piece or the bottom piece of the frame 22a may be an open hollow shape.

  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 cut out in the guide body 27, and the guide groove 27a is formed in a substantially Y shape with the insertion side extending upward in a V shape. Has been. 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. 10, FIG. 11 (a) and FIG. 11 (b)). 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 close | similar to the side through which the planting bodies 20L and 20R pass) of the stem part 100a (refer Fig.11 (a) and FIG.11 (b)). 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 7, 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 69 loosely fitted on a transport belt drive shaft 60 described later, as shown in FIGS.

  As shown in FIGS. 7 and 12, a pair of conveyor belt drive pulleys 68 are fixed to both front and rear ends of the conveyor belt drive shaft 60 extending in the front-rear direction of the traveling machine body 4 via keys 67a and 67a. The conveyor belt 21 is wound around each conveyor belt drive pulley 68. A locking projection 68 b provided on the outer periphery of each conveyor belt drive pulley 68 is fitted in the locking hole 21 f of the conveyor belt 21.

  A sprocket 69 is loosely fitted to the transport belt drive shaft 60 in front of one (rear) transport belt drive pulley 68. Specifically, the seedling transport drive chain 63 is wound around the sprocket 69. The front part of the inner periphery of the sprocket 69 is formed wide so that the one-way clutch 70 including the one-way cam 71 and the like can be accommodated.

  That is, as shown in FIGS. 12 and 13, a pair of projecting pieces 69 b are integrally formed on the outer periphery of the front portion of the sprocket 69 in the radial direction with respect to the transport belt drive shaft 60. A pair of pin holes 69c are formed in 69b so as to penetrate in the radial direction. Each projecting piece 69b is provided with a notch 69e so that an urging spring 74 made of an elastic body such as a piano wire can be slidably inserted. Both pin holes 69c and 69c will be described later. A clutch pin 73 for the one-way clutch 70 is slidably inserted. The distal end portion of the urging spring 74 is inserted into the outer end portions of both clutch pins 73 and 73.

  On the outer periphery of the front part of the sprocket 69, an urging spring support part 69d is formed so as to protrude, and the urging spring support part 69d has a substantially semicircular shape disposed along the outer periphery of the front part of the sprocket 69. A midway portion of the biasing spring 74 is inserted and supported.

  As shown in FIGS. 12 and 13, a one-way cam 71 is fitted on the outer periphery of the conveyance belt drive shaft 60 through a key 67 b and the like so as not to be relatively rotatable. The one-way cam 71 is disposed so as to fit within the front inner periphery of the sprocket 69. On the outer periphery of the one-way cam 71, steps 71b, 71b are provided at predetermined angles at substantially the same positions in the front-rear direction as the pin holes 69c, 69c. Clutch pins 73, 73 are provided in the pin holes 69c, 69c. Inserted. The end of the biasing spring 74 is inserted into the clutch pin 73 and is biased toward the center of the conveyor belt drive shaft 60 so as to always contact the outer periphery of the one-way cam 71.

  Therefore, in this embodiment, the driving force transmitted from the seedling transport drive chain 63 to the sprocket 69 is transmitted through the one-way clutch 70 constituted by the one-way cam 71, the pin holes 69c and 69c, and the clutch pins 73 and 73. It is configured to transmit to the conveyor belt drive shaft 60.

  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 synchronize the timing, the one-way clutch 70 is provided as described above, so that when the engine is stopped, the conveyor belt 21 is held to rotate in the conveyance direction (arrow A direction in FIG. 13). The sprocket 69 is stopped, but the conveyor belt drive shaft 60 and the one-way cam 71 are rotated. When the slope of the one-way cam 71 reaching the step 71b reaches the clutch pin 73, the clutch pin 73 gradually slides outward in the pin hole 69c against the biasing force of the biasing spring 74. 71b can be overcome and it can be manually idled.

  Here, the number and interval of the step 71b of the one-way cam 71, the outer diameter of the conveying belt drive pulley 68, and the arrangement interval of the seedlings 100 are as follows: the one-way cam 71 (conveying belt driving shaft 60) moves from one step 71b to the next. The conveyor belt 21 is sized so as to be fed by 100 seedlings for 100 minutes while rotating to the step 71b.

  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 for planting the seedling 100 by swinging the planted bodies 20L, 20R in the vertical direction and entering the upper surface 18 of the seedling, the seedling supply mechanism 12 is connected to an endless transport belt. Since the one-way clutch 70 is provided in the drive transmission path of the conveyor belt 21, the conveyor belt 21 can be manually sent, the engine 10 is started, the work switch is turned “ON”, and the idle operation is performed. Even if it does not exist, the seedlings arranged on the conveyor belt 21 can be sent to the seedling collecting position (seedling collecting unit) 21d. 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. .

  The one-way clutch 70 includes a one-way cam 71 fixed to the drive transmission path. When the one-way cam 71 is rotated by one step 71b, the conveying belt 21 is fed by one seedling 100 minutes. Since the conveyor belt 21 does not stop at a halfway position with respect to the planting bodies 20L and 20R, the seedling 100 in which the operator is disposed on the conveyor belt 21 such as adjustment of the conveyor belt 21 is configured. There is no need to adjust the position to the seedling collection position (seedling section) 21d. In addition, since the one-way clutch 70 is disposed on the drive shaft 75 in the vicinity of the conveyor belt 21, it is not necessary to move the device on the other drive transmission path, and the conveyor belt 21 can be sent with a small force.

  Next, the planting apparatus 13 is demonstrated using FIG.

  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.

  The seedling 100 at the seedling picking position (seeding part) 21d located at the lower end of the conveyor belt 21 is gripped by the planting bodies 20L and 20R, and planted at the lowest position of the reciprocating motion in the cage. The appendages 20L and 20R release the seedling 100, and the transplanted bodies 20L and 20R retreat upward, whereby the seedling 100 is transplanted into the cage.

  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. With the rotation of the attached drive shaft 25, the locus of the tip of the planted bodies 20L and 20R is moved along the path R (see the two-dot chain line in FIG. 14) of the crescent-shaped body through the planted body reciprocating mechanism 24. It is intended to reciprocate.

  The planted body support frame 31 has a planted body opening / closing cam mechanism 40 that opens and closes the planted bodies 20L and 20R in conjunction with the movement of the planted bodies 20L and 20R by the planted body reciprocating mechanism 24. Is provided (see FIG. 15).

  Next, power transmission to the planting drive shaft 25 will be described. As shown in FIG. 15, 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, the output shaft 81 extends from the transmission case 6 to the left (right in FIG. 15), the output bevel gear 82 is fixed to the left end of the output shaft 81, and the front bevel gear 83 that meshes with the output bevel gear 82 is provided. The fixed transmission shaft 80 is inserted into the pipe frame of one traveling machine body 4, and a rear bevel gear 84 is fixed to the rear end portion of the transmission shaft 80 in a gear case. The driving force of the engine 10 is transmitted to the rear by meshing the input bevel gear 85 fixed to the left end portion of the auxiliary drive shaft 25.

  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. 16 and 17, the planting body opening / closing roller mechanism 90 is disposed at the lower end portion of the transport 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 ( (Seedling part) 21d is closed, but since the opening / closing operation is performed on the base side of the planting bodies 20L and 20R, the opening / closing force may be weak and unstable at the tip due to deflection of the planting bodies 20L and 20R. is there.

  In the present invention, a pair of left and right rollers 23L and 23R are pivotally supported behind the seedling 100 conveyed to the seedling collecting position (seedling collecting portion) 21d at the lower end of the conveying belt 21, and the rollers 23L and 23R are pivotally supported. The planted bodies 20L and 20R that move up and down by the planted body reciprocating mechanism 24 pass through the space from top to 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. 16, 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. 16 and 17, stays 32L and 32R are fixed to the handle frames 7 and 7, and the cylindrical supports 33L and 33R are supported by the stays 32L and 32R. The cylindrical supports 33L and 33R support the cylindrical supports 33L and 33R. 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 seed body guide path 92b is formed by releasing the right side in FIGS. The guide body 92 is arranged on the open side of the seedling guide path 92b (in FIGS. 16 and 17) 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. Each planted body 20L, 20R is formed into a symmetrical shape by bending a substantially metal round bar, and a plate-shaped gripping piece is provided at the lower end (tip) of each planted body 20L, 20R. 28 is fixed, and it is comprised by this pair of holding piece 28 so that the seedling stem part 100a can be hold | gripped reliably (refer FIGS. 14-17). In addition, since the tip of each gripping piece 28 is formed in a pointed-shaped blade portion 28a, the tip blade portion 28a of the planting bodies 20L and 20R can be easily cut through the multi-film laid on the heel surface 18. The planting operation of the vine seedling 100 in the soil can be performed reliably.

  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 for guiding 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 guided between the lower portions of the left and right planted bodies 20L and 20R. This makes it easier for the lower parts of the planting bodies 20L and 20R to pinch the seedling end 100a 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.

  In addition, 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 are opened, the planting body opening / closing roller mechanism 90 and the planting body opening / closing cam mechanism 40 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.

  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 includes a pressure-reducing body 37 having a flat surface that is brought into contact with gravity by dropping on the upper surface of the heel, and a cam-type pressure-reducing drive that moves the pressure-reducing body 37 up and down in conjunction with transplanting of seedlings by the planting bodies 20L and 20R. And a mechanism (not shown).

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. The front view which shows the lower part of a traveling body. It is a side view which shows a manual left-right inclination control apparatus. It is also a plan view. It is a rear view which shows an engaging pin periphery. 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. It is a perspective view of a holder part. (A) is a perspective view of the descending part of the conveyance belt in the seedling supply mechanism, and (b) is a side sectional view of the seedling collecting part which is the lower end part of the conveyance belt. FIG. 6 is a plan sectional view showing the periphery of a conveyor belt drive shaft. Front sectional drawing which shows a one-way clutch. The side view which shows a planting body reciprocation mechanism. The top view which shows the power transmission to a planting drive shaft. 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.

Explanation of symbols

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 58 Cover body 59 Guide rail 100 Vine seedling 100a Seedling stem part

Claims (5)

The vine seedling is transported to the vicinity of the planting device by the seedling supply mechanism, the stem ends of the vine seedling are gripped by a pair of right and left planted bodies, the seedling is removed, and the planted body is moved by the planted body reciprocating mechanism. In a seedling transplanting machine that performs planting work of vine seedlings by swinging up and down and entering the field,
The seedling supply mechanism is constituted by an endless conveyance belt,
The conveyor belt is provided with a seedling holder part that holds the seedling part at appropriate intervals along the conveying direction,
The holder part is composed of a pair of synthetic resin-made elastic grippers positioned before and after the transport direction, and the pair of elastic grippers are formed on convex curved surfaces where the parts that grip the seedlings face each other. A seedling transplanter characterized in that   The seedling transplanter according to claim 1, wherein a guide body for guiding the seedling stalk portion is provided on a side on which the planted body passes adjacent to the holder portion.   The seedling transplanter according to claim 1 or 2, wherein each of the elastic grippers is hollow.   The seedling transplanter according to claim 2 or 3, wherein an insertion side of a guide groove for guiding the stem portion of the seedling is formed in the guide body in a substantially V shape.   The guide rail extending from the lowering process of the conveying belt to the seedling removing part in the seedling supply mechanism is disposed on the protruding side of the seedling part rather than the holder part and the guide body. The seedling transplanter according to claim 2 or 3, characterized in that.

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