JP4764102B2 - Seedling transplanter - Google Patents

Description

  The present invention relates to a seedling transplanting machine for planting seedlings in a field.

Conventionally, the seedling is transported to the vicinity of the planting device by the seedling supply mechanism, the stem end is gripped by the planting claw, the planting claw is swung up and down, and the tip of the planting claw is entered into the field. By this, the seedling transplanter which performs a planting operation | work is known (for example, refer patent document 1). And the conveyor belt of the seedling supply mechanism is constituted by an endless rubber belt extending to the outside in the left-right direction of the traveling machine body, and the left and right trough valleys through which the left and right traveling bodies pass are respectively left and right workers. By feeding the seedlings to the upper lateral feed part of the seedling transporting part while walking, the seedling supply work can be performed jointly by two persons (for example, see Patent Document 2).
JP 2000-333515 A JP 2003-9616 A

  However, in the conventional seedling transplanting machine as shown in Patent Document 2, the upper lateral feed part that the transport belt sends in one left-right direction on the upper side of the machine body, and the lowering feed part that feeds downward following the upper lateral feed part And the ascending feed part, which is sent upwardly following the descending feed part and returned to the feed start end side of the upper transverse feed part, so that the seedling could only be set in the upper transverse feed part . Therefore, when starting seedling planting, the planting claws cannot grasp the seedling until the first seedling reaches the lower end of the descending feed part, and the planting operation is performed several times without holding the seedling. There was a need. Further, when the seedling planting is finished, it is difficult to remove the seedling remaining in the descending feed portion.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

In claim 1, the seedling (100) is transported to the vicinity of the planting device (13) by the seedling supply mechanism (12) arranged behind the mission case (6) and above the handle frame (7). Then, the stem end of the seedling (100) is grasped with a pair of left and right planting claws (20L, 20R) to carry out seedling harvesting, and the planting claw (20L, 20R) is moved up and down by a nail reciprocating mechanism (24). In the seedling transplanting machine (1) that swings in the direction and enters the field to plant seedlings, the seedling supply mechanism (12) is constituted by an endless transport belt (21), and the seedling supply The mechanism (12) is substantially reverse in rear view by an upper lateral feed portion (21a) that feeds in the left and right direction on the upper side of the machine body, a descending feed portion (21b) that follows, and an ascending feed portion (21c) that returns to the starting end side. It is configured in a triangle, and the drive mechanism of the seedling supply mechanism (12) The sprocket (57) is driven by the PTO shaft (50) extending rearward from the cushion case (6), and the other end of the seedling transport drive chain (63) wound around the sprocket (57) is connected to the transport belt. It is wound around a sprocket (69) loosely fitted on the drive shaft (75), and the conveyor belt drive shaft (75) is supported on one end of the upper lateral feed portion (21a) of the seedling supply mechanism (12), Between the sprocket (69) and the conveyor belt drive shaft (75), a one-way clutch (70) that enables the conveyor belt (21) to be manually idled is interposed, and the transmission case (6) The output shaft (81) driven in conjunction with the PTO shaft (50) extends laterally from the output shaft (81) via the transmission shaft (80) and the planting device (13). To transmit power to Supplying mechanism (12), by releasing the connection of the PTO shaft (50), which is constituted to be detachable from the transmission case (6) and the handle frame (7).

The seedling transplanter according to claim 1, wherein the one-way clutch (70) includes a one-way cam (71) fixed on the transport belt drive shaft (75), and the one-way cam The conveyor belt (21) is configured to be fed by one seedling by manually rotating one step of (71) .

  As effects of the present invention, the following effects can be obtained.

In claim 1, the seedling (100) is transported to the vicinity of the planting device (13) by the seedling supply mechanism (12) arranged behind the mission case (6) and above the handle frame (7). Then, the stem end of the seedling (100) is grasped with a pair of left and right planting claws (20L, 20R) to carry out seedling harvesting, and the planting claw (20L, 20R) is moved up and down by a nail reciprocating mechanism (24). In the seedling transplanting machine (1) that swings in the direction and enters the field to plant seedlings, the seedling supply mechanism (12) is constituted by an endless transport belt (21), and the seedling supply The mechanism (12) is substantially reverse in rear view by an upper lateral feed portion (21a) that feeds in the left and right direction on the upper side of the machine body, a descending feed portion (21b) that follows, and an ascending feed portion (21c) that returns to the starting end side. It is configured in a triangle, and the drive mechanism of the seedling supply mechanism (12) The sprocket (57) is driven by the PTO shaft (50) extending rearward from the cushion case (6), and the other end of the seedling transport drive chain (63) wound around the sprocket (57) is connected to the transport belt. It is wound around a sprocket (69) loosely fitted on the drive shaft (75), and the conveyor belt drive shaft (75) is supported on one end of the upper lateral feed portion (21a) of the seedling supply mechanism (12), Between the sprocket (69) and the conveyor belt drive shaft (75), a one-way clutch (70) that enables the conveyor belt (21) to be manually idled is interposed, and the transmission case (6) The output shaft (81) driven in conjunction with the PTO shaft (50) extends laterally from the output shaft (81) via the transmission shaft (80) and the planting device (13). To transmit power to Supplying mechanism (12), by releasing the connection of the PTO shaft (50), by which is removably constructed from transmission case (6) and the handle frame (7), be manually sending a conveyor belt Therefore, the seedling disposed on the conveyor belt can be sent to the seedling picking position without starting the engine and turning the work switch “ON” to perform the idling operation.
In addition, even after the planting operation is finished and the engine is stopped, the conveyor belt can be manually fed, so that the seedling sweet potato remaining on the conveyor belt can be easily removed.

In addition, 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 50, and can be attached to and detached from the main frame. Easy.
Further, the seedling supply mechanism 12 can be configured separately from the engine frame 5, the transmission case 6 and the handle frame 7 that constitute the main frame of the traveling machine body 4, and the assembly of the main body mainly using the main frame. It can be attached later.

The seedling transplanter according to claim 1, wherein the one-way clutch (70) includes a one-way cam (71) fixed on the transport belt drive shaft (75), and the one-way cam Since the conveyor belt (21) is fed by one seedling by manually rotating one step of (71) , the conveyor belt may stop at a halfway position. This eliminates the need for the operator to adjust the seedling disposed on the conveyor belt to the seedling collection position, such as adjustment of the conveyor belt.

  Further, since the one-way cam is disposed on the drive shaft in the vicinity of the conveyor belt, it is not necessary to move the device on the other drive transmission path, and the conveyor belt can be sent with a small force.

  Next, embodiments of the invention will be described.

  1 is an overall side view showing a seedling transplanter 1 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 4, and FIG. 4 is a side view showing a front wheel support device 9. 5 is a perspective view showing the lower front wheel support shaft 46 and the regulating member 47, FIG. 6 is a side view showing the manual left-right tilt control device 49, FIG. 7 is a plan view, and FIG. 9 is a rear view showing the seedling supply mechanism 12, and FIG. 10 is a plan view of the same.

  11 is a rear view and a plan view showing another embodiment of the soft member 22c, FIG. 12 is a plan sectional view showing the periphery of the conveyor belt drive shaft 75, FIG. 13 is a front sectional view showing the one-way clutch 70, and FIG. FIG. 15 is a plan view showing power transmission to the planting drive shaft 25, FIG. 16 is a rear view showing the claw opening / closing roller mechanism 90 with the planting claws 20L and 20R opened. 17 is a rear view showing the closed state, FIG. 18 is a side view showing the pressure-reducing device 14 before and after pressure reduction in the case of “bottom planting”, and FIG. 19 is before and after pressure reduction in the case of “oblique planting”. It is a side view which shows the pressure suppression apparatus 14 of.

  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 a rear wheel 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, explanation will be made taking the sweet potato seedling 100 as an example.

  The main frame of the traveling machine body 4 is configured by connecting and fixing a front engine frame 5, a central transmission case 6 and a rear handle frame 7 in the front-rear direction. The device is supported. 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 cocoon guide rollers 8a and 8a for contacting the left and right side surfaces (slopes) of the cocoon. I have. By controlling the direction of the seedling transplanter 1 by operating the seedling transplanter 1 by driving the seedling transplanter 1 in this state by inserting a cage between these guideline rollers 8a and 8a or rolling it while being in contact with the slope. 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 front wheel arms 9b and 9b that are slidable in the axial direction of the upper front wheel support shaft 9a and support the front wheels 2. And are provided. 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 case 11b * 11b which supports each rear wheel 3 freely is 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 will be described. As shown in FIGS. 3 and 4, the front wheels 2 and 2 are supported by the traveling machine body 4 by the front wheel support devices 9 and 9, and the front wheel 2a of the front wheels 2 and 2 opens upward in the traveling direction. It is supported in the state of. That is, the front wheels 2 and 2 are supported while maintaining a constant camber angle from the vertical direction. In the seedling transplanting machine 1 of this embodiment, a lower front wheel support shaft 46 as shown in FIG. 5 is pivotally supported at the lower end of each front wheel arm 9b, and the front wheel 2a is loosely fitted on the lower front wheel support shaft 46. Has been.

  As shown in FIGS. 3 to 5, the lower front wheel support shaft 46 is bent in a reverse “h” shape when viewed from the front, and is horizontally 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 part 46a and 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.

  That is, the upper plate 47c and the lower plate 47d protrude from the top and bottom of the vertical wall 47e of the first support member 47a in the outer horizontal direction, and a through hole is opened in the middle of the top and bottom of the vertical wall 47e to form the lower front wheel support shaft 46. The horizontal portion 46a is inserted and fixed. Further, the upper and lower tips of the second support member 47b are fixed above and below the through-hole on the outer surface of the vertical wall 47e of the first support member 47a, and pass through the upper and lower central portions of the upper and lower surfaces 47f of the second support member 47b. The inclined portion 46b is inserted and fixed by opening a hole. The upper and lower surfaces 47f and the vertical wall 47e are not parallel, but are set at an angle for providing a camber. In this way, the first support member 47a, the second support member 47b, and the lower front wheel support shaft 46 are welded and integrally configured.

  Here, when the horizontal portion 46a of the lower front wheel support shaft 46 is inserted into the lower end of the front wheel arm 9b to prevent it from coming off and fixed so as to be rotatable, the upper plate 47c and the lower plate 47d become front wheel arm 9b as shown in FIG. The upper plate 47c and the lower plate 47d serve as stoppers that prevent the front wheel 2 (front wheel 2a) from rotating until the camber angle becomes a negative angle. That is, when the front wheel arm 9b is raised or when the front wheel 2 is lifted, the inclined portion 46b tends to be inclined downward due to the weight of the front wheel 2, but when the lower front wheel support shaft 46 rotates, the regulating member 47 also rotates so that the upper plate 47c or the lower plate 47d contacts the upper surface or the lower surface of the front wheel arm 9b, and the lower front wheel support shaft 46 and the like rotate relative to the front wheel support device 9 by about 45 degrees or more in a side view. It is supposed not to.

  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 ridge 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 is rotated downward with respect to the arm 9b, the upper plate 47c or the lower plate 47d is in contact with 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. This prevents the discomfort caused by 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 heel surface 18.

  The traveling machine body 4 can be adjusted in height position with respect to the front wheels 2 and 2 and the rear wheels 3 and 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 and 2 and the rear wheels 3 and 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 contracting the actuator 19, the traveling machine body 4 moves up and down with respect to the front wheels 2 and 2 and the rear wheels 3 and 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.

  The hydraulic valve housed in the hydraulic unit 26 is disposed such that the upper end portion of the spool 51 protrudes from the upper surface of the rear portion of the hydraulic unit 26 as shown in FIGS. 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 41 in a rear view is pivotally supported behind the support member 54. Specifically, a fan-shaped central portion of the plate-like member 41 is connected 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 41 is fixed at the front by welding or the like. In other words, when the operator rotates the operation lever 56 with respect to the support member 54, the fan-shaped plate-like member 41 rotates in conjunction with the control rod 55.

  As shown in FIG. 8, the plate-like member 41 is formed in a substantially fan shape, and an arcuate arc long hole 41b is formed in the lower part. The arc long hole 41 b is formed such that the center position of the arc is located to the right of the rotation center of the plate-like member 41 and the control rod 55. That is, when the plate-like member 41 is rotated around the control rod 55, the radial distance between the control rod 55 and the circular arc long hole 41b is configured to change gradually or long. The engaging pin 53 is inserted into the long hole 54b and the circular arc long hole 41b. Therefore, when the plate-like member 41 is rotated around the control rod 55, the engagement pin 53 is guided by the arc long hole 41b 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 41 rotates clockwise. As a result, the engaging pin 53 descends along the long hole 54b and the circular arc long hole 41b. As a result, the spool 51 slides downward to switch the hydraulic valve (not shown), and the traveling machine body 4 is left and right by the actuator. Inclined in the direction. Conversely, when the operator rotates the operation lever 56 counterclockwise as viewed from the back, the plate-like member 41 rotates counterclockwise, and the engagement pin 53 moves along the long hole 54b and the circular arc long hole 41b. 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, in the manual left / right tilt control device 49 of the present embodiment, the operation lever 56 is disposed behind the seedling supply mechanism 12, so that the operator can transfer the seedlings 100, 100. 21) or at the time of movement, the left-right inclination 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. The seedling supply mechanism 12 is configured to transmit power from the PTO shaft 50 of the transmission case 6, and in the transmission case 6, the PTO shaft 50 and an output shaft 81 described later are interlocked, 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.

  Further, 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 50, and can be attached to and detached from the main frame. Easy. As shown in FIGS. 9 and 10, the seedling supply mechanism 12 transports and supplies the seedling 100 accommodated in a seedling accommodation case (not shown) to the planting claws 20 </ b> L and 20 </ b> R provided in the planting apparatus 13. It is. The seedling supply mechanism 12 is provided with a belt-like transport belt 21 that rotates clockwise in a rear view. Specifically, the transport belt 21 is connected to the upper lateral feed portion 21a that feeds in the left-right direction on the upper side of the machine body, the lower feed portion 21b that feeds downward following the upper lateral feed portion 21a, and the lower feed portion 21b. It is composed of an upward feed portion 21c that feeds upward and returns to the feed start end side of the upper lateral feed portion 21a, and is held in a substantially inverted triangle in rear view.

  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 picking position 21d where the seedlings are handed over to the planting claws 20L and 20R. On the outer periphery of the conveyor belt 21, rectangular plate-shaped partitions 21e, 21e,... Are projected in parallel in the front-rear direction toward the outer periphery of the conveyor belt 21 made of a flat belt. The seedlings 100, 100,... Are placed between 21e, 21e,. Locking holes 21f, 21f,... Are formed in the front and rear portions of the transport belt 21 along the transport direction, and the outer periphery of the transport belt drive pulleys 68, 68 described later is formed at the right end of the transport belt 21. The provided locking projections 68b, 68b,... Are fitted into the locking holes 21f, 21f,.

  A soft member 22a made of an elastic material such as a sponge is fixed to the rear end of the outer periphery of the conveyor belt 21 for each partition 21e. The soft members 22a, 22a, ... are formed with recesses 22b, 22b ... on the upper surface, and the operator can locate the vicinity of the stem ends of the seedlings 100, 100 ... in the recesses 22b, 22b ... The seedling 100 is supplied to the seedling supply mechanism 12 with the pinch in between. A cover body 76 is disposed from the right side to the lower side along the outer periphery of the conveyance belt 21. This is because the seedlings 100, 100,... Located between the partitions 21e, 21e,... In the descending feed part 21b are sandwiched between the recesses 22b of the soft member 22a and the stem end portion is sandwiched so that the leaf side hangs. This is for receiving and guiding the seedling 100 so that the bend does not bend.

  Further, as another embodiment of the soft member 22a, an endless belt-like soft member 22c as shown in FIG. 11 may be used. That is, a belt-shaped soft member 22c along the outer periphery of the conveyor belt 21 is fixed to the rear end of the outer periphery of the conveyor belt 21, and a concave recess for holding a seedling is formed at a predetermined interval on the upper surface of the soft member 22c. 22d, 22d... Are formed. As shown in FIG. 11, it is not necessary to provide partitions 21e, 21e,... On the outer periphery of the conveyor belt 21, and it is not limited whether or not they are provided.

  Next, driving force transmission of the seedling supply mechanism 12 will be described. As shown in FIGS. 1, 2, and 9, the PTO shaft 50 extends rearward from the mission case 6. A gear 61 is fixed to the rear end portion of the PTO shaft 50, and a sprocket 57 is fixed on a support shaft of the gear 62 that meshes with the gear 61. One end of 63 is wound. The rear end portion of the PTO shaft 50, 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 accommodated 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 75 described later, as shown in FIGS.

  As shown in FIG. 12, conveyor belt drive pulleys 68 and 68 are fixed to both front and rear ends of the conveyor belt drive shaft 75 via keys 67a and 67a. The right end portion of the conveyor belt 21 is wound. Specifically, locking protrusions 68b, 68b,... Provided on the outer periphery of the conveyor belt drive pulleys 68, 68 are fitted into the locking holes 21f, 21f,. A sprocket 69 is loosely fitted in front of the rear conveyance belt drive pulley 68. Specifically, the sprocket 69 is a sprocket around which the right outer end of the seedling conveyance drive chain 63 is wound, The front part of the inner periphery of the sprocket 69 is formed wide so that a one-way cam 71 described later can be accommodated.

  As shown in FIGS. 12 and 13, bosses 69b and 69b are formed on the outer periphery of the front portion of the sprocket 69 in the radial direction with respect to the conveyor belt drive shaft 75. The bosses 69b and 69b Pin holes 69c and 69c are formed penetrating in the radial direction. The boss portions 69b and 69b are provided with notches 69e, 69e,... So that an urging spring 74 composed of an elastic body such as a piano wire described later can be slidably inserted. Clutch pins 73 and 73 for a one-way clutch 70 described later are slidably inserted into the holes 69c and 69c. The tip end portion of the urging spring 74 is inserted into the outer end portion of the clutch pins 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 substantially semicircle disposed along the outer periphery of the front part of the sprocket 69 at the urging spring support part 69d. The middle portion of the urging 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 75 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 and 71b are provided at predetermined angles at substantially the same positions in the front-rear direction as the pin holes 69c and 69c. Clutch pins 73 and 73 are provided in the pin holes 69c and 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 75 so as to always contact the outer periphery of the one-way cam 71. As described above, the boss portions 69b and 69b are provided with the notches 69e, 69e,... So that the end portions of the urging springs 74 can move together with the clutch pins 73 and 73.

  That is, 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 75. 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 75 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 steps 71b, 71b,... Of the one-way cam 71, the outer diameter of the conveyor belt drive pulley 68, and the arrangement interval of the seedlings 100, 100,. 75) is sized so that the conveyor belt 21 is fed by one seedling 100 minutes while rotating from one step 71b to the next step 71b.

For example, in this embodiment, two steps 71 b and 71 b are provided on the outer periphery of the one-way cam 71, four locking protrusions 68 b are provided on the outer periphery of the conveyor belt drive pulley 68, and one seedling is formed on the conveyor belt 21. Since two locking holes 21f and 21f are formed for every 100, when the operator manually feeds the conveying belt 21 for one of the seedlings 100, the conveying belt for two of the locking holes 21f and 21f. 21 is fed, and the conveying belt drive pulley 68 is fed by two of the locking projections 68b and 68b in conjunction with the locking holes 21f and 21f, and the clutch pin 73 is set by one step 71b of the one-way cam 71. 73 is designed to rotate.

  In this way, the seedling 100 is transported to the vicinity of the planting device 13 by the seedling supply mechanism 12, the stem ends are gripped by the pair of left and right planting claws 20L and 20R, and the seedling is taken. In the seedling transplanting machine 1 for planting the seedling 100 by swinging the planting claws 20L and 20R vertically and entering the field 18, the seedling supply mechanism 12 is configured by an endless transport belt 21. In addition, 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 fed, and it is not necessary to start the engine 10 and set the work switch to “ON” for idling. The seedling disposed on the conveyor belt 21 can be sent to the seedling collection position 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.

  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 conveyor belt 21 is only one seedling 100 minutes. Since the conveyor belt 21 does not stop at a halfway position with respect to the planting claws 20L and 20R, the seedling provided on the conveyor belt 21 by the operator such as adjustment of the conveyor belt 21 is configured. There is no need to match 100 to the seedling position 21d.

  Further, since the one-way cam 71 is fixed on the drive shaft 75 of the transport belt 21, the one-way cam 71 is disposed on the drive shaft 75 in the vicinity of the transport belt 21, so that other drive transmissions are possible. It is not necessary to move the path device, and the conveyor belt 21 can be sent with a small force.

In addition, since the soft members 22a and 22c are disposed on the outer peripheral rear portion of the conveyor belt 21, and the concave portions 22b and 22d for sandwiching the stem ends are provided on the soft members 22a and 22c,
With a simple configuration, the seedling 100 can be reliably held.

  The planting apparatus 13 is demonstrated using FIG. The planting device 13 includes a pair of left and right planting claws 20L and 20R, a claw reciprocating mechanism 24 that reciprocates the planting claws 20L and 20R from the seedling position 21d to the inside of the cocoon, and a planting claw 20L and a cam mechanism. It comprises a claw opening / closing cam mechanism (not shown) that opens and closes 20R.

  The planting claws 20L and 20R are for transplanting the seedling 100 delivered from the seedling picking position 21d of the seedling supply mechanism 12 into the cage, and holding the seedling 100 by opening and closing the left and right planting claws 20L and 20R. In addition, the held seedling 100 can be released. The seedling 100 at the seedling picking position 21d located at the lower end of the conveyor belt 21 is sandwiched and gripped by the planting claws 20L and 20R, and the planting claws 20L and 20R are at the lowest position of the reciprocating motion in the cage. Releases the seedling 100, and the planting claws 20L and 20R are retracted upward, whereby the seedling 100 is transplanted into the cage.

  The claw reciprocating mechanism 24 is a crank mechanism that converts the rotational movement of the planting drive shaft 25 into the reciprocating movement of the planting claws 20L and 20R from the seedling supply mechanism 12 into the cocoon. By rotating the shaft 25, the locus of the tips of the planting claws 20L and 20R is reciprocated along the path R (see the two-dot chain line in FIG. 14) of the crescent-like body via the claw reciprocating mechanism 24. Is. The claw support case 31 is provided with a claw opening / closing cam mechanism (not shown) that opens and closes the planting claws 20L and 20R in conjunction with the movement of the planting claws 20L and 20R by the claw reciprocating mechanism 24. Yes.

  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. That is, an output shaft 81 extends to the left from the transmission case 6, 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 fixed. Thus, the driving force of the engine 10 is transmitted backward. A rear bevel gear 84 is fixed to the rear end portion of the transmission shaft 80, and 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.

  In this way, the drive transmission from the transmission case 6 to the planting device 13 is performed by shaft transmission through the bevel gears 82, 83, 84 and 85, so that the drive 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. Specifically, when the planting device 13 is driven by a chain, the slack of the chain is unavoidable due to the structure, and the driving force in the reverse direction is generated by the weight of the planting claws 20L and 20R. At the time of switching between the case where the transmission is transmitted and the case where the reverse driving force is transmitted from the lower side, the movement of the planting device 13 is jerky and does not become smooth.

Next, the claw opening / closing roller mechanism 90 will be described. As shown in FIG. 14, the claw opening / closing roller mechanism 90 is disposed at the lower end portion of the conveying belt 21 of the seedling supply mechanism 12, and compared with a case where only the claw opening / closing mechanism is controlled. This is for accurately closing the planting claws 20L and 20R at the seedling position 21d. As shown in FIGS. 16 and 17, a pair of left and right rollers 23L and 23R are pivotally supported behind the seedling 100 conveyed to the lower end of the conveyor belt 21, and the claw reciprocation is performed between the rollers 23L and 23R. The planting claws 20 </ b> L and 20 </ b> R that move up and down by the moving mechanism 24 pass from the top to the bottom.

  That is, as shown in FIG. 14, even when the claw opening / closing roller mechanism 90 is not provided, the planting claws 20 </ b> L and 20 </ b> R are rotated downward in the open state, and the lower end portion of the transport belt 21. However, since the opening / closing operation is performed on the base side of the planting claws 20L / 20R, the opening / closing force may be weak and unstable at the tip due to the deflection of the planting claws 20L / 20R. is there. Therefore, in the present invention, the rollers 23L and 23R are arranged on both sides of the rotation trajectory of the planting claws 20L and 20R immediately below the seedling picking position 21d of the conveyed seedling 100, and the planting claws 20L and 20R are attached. Immediately after closing and holding the seedling 100, the rollers 23L and 23R are passed. Thus, the both sides of the planting claws 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 nail | claw 20L * 20R is closed. As shown in FIGS. 16 and 17, the initial positions of the rollers 23L and 23R (positions of the rollers 23L and 23R not sandwiching the planting claws 20L and 20R) are formed on the side surfaces of the slide shafts 36L and 36R described later. The position of the pin is determined.

  Hereinafter, a method for supporting the 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, and the cylindrical supports 33L and 33R are supported. The sliding cylinders 35L and 35R are supported. Slide shafts 36L and 36R are slidably inserted into the slide cylinders 35L and 35R, and plate-like members 41L and 41R are fixed to the seedling 100 side ends of the slide shafts 36L and 36R. Rollers 23L and 23R are pivotally supported at the seedling 100 side ends of the plate-like members 41L and 41R. Elastic members 43L and 43R are disposed between the end portions of the plate-like members 41L and 41R on the side opposite to the seedling 100 and the tube supports 33L and 33R, and the elastic members 43L and 43R are restored. The sliding shafts 36L and 36R are urged toward the seedling 100 (the left and right centers of the planting claws 20L and 20R) by force.

  An upper portion of the left plate-like member 41R is fixedly provided with a substantially U-shaped guide body 92 that is opened to the right and has a seedling guide path 92b. 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.

  Between the upper ends of the planting claws 20L and 20R, a claw opening spring 93 made of a tension spring is disposed, and the planting claws 20L and 20R are attached by the claw opening spring 93 so that the upper part is closed. It is energized. That is, the planting claws 20L and 20R are biased in the direction in which the lower part opens. Then, when the planting claws 20L and 20R whose lower portions are in the open state descend to the seedling picking 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 and 23R, the sliding shafts 36L and 36R in the sliding cylinders 35L and 35R slide in the direction of the anti-seedling 100 so that the planting claws 20L and 20R can pass therethrough.・ The interval between 23R is widened. The load with which the planting claws 20L and 20R sandwich the seedling 100 is made appropriate by the load of the elastic members 43L and 43R and the gap between the rollers 23L and 23R.

  In this way, the seedling 100 is transported to the vicinity of the planting device 13 by the seedling supply mechanism 12, the stem ends are gripped by the pair of left and right planting claws 20L and 20R, and the seedling is taken. In the seedling transplanting machine 1 for planting the seedling 100 by swinging the planting claws 20L and 20R in the vertical direction and entering the field, a pair of left and right rollers 23L and 23R are provided below the seedling picking position 21d. Since the planting claws 20L and 20R pass between the rollers 23L and 23R, the left and right planting claws 20L and 20R When the seedling 100 is present at the lower part of the 20R, the seedling 100 can be pinched by closing the planting claws 20L and 20R in a timely manner. That is, it is not necessary to excessively increase the rigidity of the planting claws 20L and 20R or adopt a special material and structure in order to prevent the planting claws 20L and 20R from being bent.

  Further, since the guide body 92 for guiding the stem end portion of the seedling 100 is provided above either the left or right of the rollers 23L and 23R, the stem end portion of the seedling 100 is located between the lower portions of the left and right planting claws 20L and 20R. So that the lower part of the planting claws 20L and 20R can easily hold the stem end portion of the seedling 100. That is, even if the stem end portion of the seedling 100 is bent, it can play a role of correcting such bending.

  Further, a claw opening / closing cam mechanism 40 is provided in the claw reciprocating mechanism 24, and the planting claw 20L / 20R is moved by the claw opening / closing cam mechanism 40 while the planting claw 20L / 20R passes between the rollers 23L / 23R. Since the planting claws 20L and 20R pass between the rollers 23L and 23R, the planting claws 20L and 20R can be held in a closed state.

  Further, since the planting claws 20L and 20R are urged by the elastic member 93 in the direction in which the planting claws 20L and 20R open, the planting claws 20L and 20R by the claw opening / closing roller mechanism 90 and the claw opening / closing cam mechanism 40 are used. When the closed state is released, the planting claws 20L and 20R are automatically opened by the elastic member 93, and the seedling 100 can be released.

  Next, the planting claws 20L and 20R will be described. The planting claws 20L and 20R have a symmetrical shape, and the opposing surfaces of the tips (lower ends) of the planting claws 20L and 20R are both waved to sandwich the stem ends of the seedling 100. It is formed in a mold or an uneven shape. The direction of the groove formed in the corrugated shape or the uneven shape is formed so as to be orthogonal to the axial direction of the stem of the seedling 100 when the planting claws 20L and 20R grip the seedling 100.

  In this way, the inner surface of the tip of the planting claw has a wave shape or an uneven shape, and the groove direction of the wave shape or the uneven shape is orthogonal to the axial direction of the stem of the seedling 100 at the time of seedling removal. Therefore, the seedling 100 can be prevented from sliding down between the planting claws 20L and 20R, and the planting accuracy of the seedling 100 can be improved. Moreover, it can prevent that the seedling 100 slips on the opposing surface of the planting claws 20L and 20R at the time of seedling collection, and can prevent a seedling removal mistake. In addition, it becomes difficult for soil to adhere to the opposing surfaces of the planting claws 20L and 20R.

  Next, the suppression device 14 that suppresses the planting location after planting the seedling 100 will be described. As shown in the case of “ship bottom planting” in FIG. 18, the pressure reducing device 14 reduces the upper surface 18 into which the planting claws 20L and 20R are inserted, and planting holes formed by the planting claws 20L and 20R. The seedling 100 is configured to be securely held in the cocoon. The pressure-reducing device 14 includes a pressure-reducing roller 34 as a pressure-reducing body that is brought into contact with the upper surface of the heel, and a pressure-reducing drive mechanism 95 that moves the pressure-reducing roller 34 up and down in conjunction with seedling transplantation by the planting claws 20L and 20R. It has been.

  An angle adjustment frame 94 is disposed inside (right) the handle frame 7 on the left side of the machine body of the claw reciprocating mechanism 24, and a guide cylinder 97 is fixed to the right side of the angle adjustment frame 94 with bolts 96B and 96T. Has been. At the lower end of the guide tube 97, a support stay 97b is extended to slidably support a biasing arm 45 branched from a roller arm 98 described later.

  Here, the lower adjustment bolt 96B serves to determine the angle of the guide tube 97 with respect to the handle frame 7, that is, the sliding direction of the roller arm 98, and is a long hole formed in the angle adjustment frame 94. 94b is inserted. That is, in the case of “bottom planting”, as shown in FIG. 18, the adjusting bolt 96B is fitted in the middle or rear of the long hole 94b to fix the guide tube 97, and in the case of “oblique planting”, FIG. As shown in the figure, the adjusting bolt 96B is fitted into the front portion of the long hole 94b to fix the guide cylinder 97, thereby changing the abutting direction of the pressure reducing roller 34 to the flange upper surface 18.

  A cam member 44 is fixed to the planting drive shaft 25. The cam member 44 is formed with a circumferential portion 44a formed in a substantially arc shape by partially cutting a disk, and a cutout portion 44b formed by cutting out from the circumferential portion 44a in the inner circumferential direction. In the cam member 44, the shape of the circumferential portion 44a is substantially arc-shaped with the planting drive shaft 25 as the center, and a through hole 44c is drilled at the center, and the planting drive shaft is inserted into the through hole 44c. 25 is inserted.

  A roller arm 98 is slidably inserted in the guide tube 97, and a biasing arm 45 is fixed on the upper surface of the lower part of the roller arm 98 toward the front and front. 45 is bent toward the rear upper side at the front upper side of the fixed position, and the rear part is inserted into the urging arm hole 97c formed in the support stay 97b. At the upper end of the roller arm 98, an engagement arm 88 is erected upward, and at the end of the engagement arm 88, an engagement portion 88b such as a roller is provided. The engaging portion 88b repeatedly comes into contact with the circumferential portion 44a and the cutout portion 44b while the cam member 44 is rotated by a biasing force of a biasing spring 99 described later and the weight of the roller arm 98 and the like. .

  The urging arm 45 is provided with a stop member 89 in the vicinity of the bending position, and an urging spring 99 is interposed between the stop member 89 and the support stay 97b. As shown in FIG. 18B, when the pressure reducing roller 34 is lowered to the upper surface 18, that is, when the engaging portion 88 b is in contact with the notch portion 44 b of the cam member 44, The upper end portion does not reach the support stay b and is in the most extended state. On the other hand, as shown in FIG. 18A, when the pressure-reducing roller 34 is not lowered onto the upper surface 18, that is, when the engaging portion 88b is in contact with the circumferential portion 44a of the cam member 44, the urging spring The upper end of 99 contacts the lower surface of the support stay 97b, the lower end contacts the stop member 89, and the biasing spring 99 is held in a state shorter than the free length. At this time, the urging arm 45 and the roller arm 98 are urged downward by the urging force of the urging spring 99 by the stop member 89.

  In this way, by configuring the roller arm 98 to be biased downward by the biasing arm 45 having the biasing spring 72 interposed therebetween, not only the pressure reducing roller 34 is dropped by its own weight but also the roller arm 98 is surely secured. Thus, the upper surface 18 can be reliably crushed by the pressure roller 34.

  As shown in FIG. 18B, when the cam member 44 is rotated by the planting drive shaft 25 and the engaging portion 88b reaches the notch 44b of the cam member 44, the biasing force and the self-weight of the biasing spring 99 are obtained. As a result, the roller arm 98 slides downward along the guide tube 97, and the heel surface 18 is crushed by the pressure roller 34. The timing at which the pressure reducing roller 34 falls and reduces pressure on the heel surface 18 is adjusted to be immediately after the planting claws 20L and 20R are pulled out from the heel.

  Then, as shown in FIG. 18 (a), the cam member 44 is continuously rotated, and the engaging portion 88b of the engaging arm 88 is guided along the shape of the slope portion of the notch portion 44b to be engaged. The arm 88 is gradually moved upward. In conjunction with the movement of the engagement arm 88, the roller arm 98 is slid. The engagement arm 88 and the roller arm 98 are slid upward until the engagement portion 88b of the engagement arm 88 reaches the circumferential portion 44a from the notch portion 44b. 88 is stopped, and the roller arm 98 and the pressure-reducing roller 34 are also stopped in a state where they are raised to the uppermost position.

  As shown in FIG. 19, similarly in the case of “oblique planting”, the roller arm 98 and the pressure-reducing roller 34 slide up and down as the cam member 44 rotates. As described above, in the case of “oblique planting”, the guide cylinder 97 is rotated together with the roller arm 98 and the like around the pivot bolt 96T, and the adjustment bolt 96B is moved substantially in the front, rear, and lower direction of the angle adjustment frame 94. It is inserted and fixed to the front end of the long hole 94b provided in the. That is, by rotating the guide tube 97 along the long hole 94b of the angle adjusting frame 94 and fixing it with the adjusting bolt 96B, the pressure reducing roller 34 can be pressed against the upper surface 18 at an arbitrary angle. .

BRIEF DESCRIPTION OF THE DRAWINGS The whole side view which shows the seedling transplanter 1 which is one Example of this invention. FIG. The front view which shows the traveling body 4 lower part. The side view which shows the front wheel support apparatus 9. FIG. The perspective view which shows the lower front wheel support shaft 46 and the control member 47. FIG. The side view which shows the manual left-right inclination control apparatus 49. FIG. FIG. The rear view which shows the engaging pin 53 periphery. The rear view which shows the seedling supply mechanism 12. FIG. FIG. (A) The rear view which shows another Example of the soft member 22c. (B) The same top view. FIG. 6 is a plan sectional view showing the periphery of a conveyor belt drive shaft 75. FIG. 3 is a front sectional view showing the one-way clutch 70. The side view which shows the nail | claw reciprocation mechanism 24. FIG. The top view which shows the power transmission to the planting drive shaft 25. FIG. The rear view which shows the nail | claw opening-and-closing roller mechanism 90 of the state in which the planting nail | claw 20L * 20R was open. The rear view which similarly shows the closed state. (A) The side view which shows the suppression device 14 before suppression in the case of "ship bottom planting". (B) The side view which similarly shows after suppression. (A) The side view which shows the suppression device 14 before suppression in the case of "oblique planting". (B) The side view which similarly shows after suppression.

1 Seedling transplanter 10 Engine 12 Seedling supply mechanism 13 Planting device 18 Farm (upper surface)
20L / 20R Planting claws 21 Conveying belt 21b Lowering feed part 21d Seeding position 22a Soft member 22b Recess 24 Claw reciprocating mechanism 70 One-way clutch 71 One-way cam 71b Step 75 Conveying belt drive shaft 100 Seedling

Claims (2)

The seedling (100) is transported to the vicinity of the planting device (13) by the seedling supply mechanism (12) disposed behind the mission case (6) and above the handle frame (7). ), The seedlings are gripped by a pair of left and right planting claws (20L, 20R), and seedlings are taken, and the planting claws (20L, 20R) are swung up and down by a claw reciprocating mechanism (24). In the seedling transplanter (1) that enters the farm and performs seedling planting work, the seedling supply mechanism (12) is constituted by an endless conveyor belt (21), and the seedling supply mechanism (12) The upper lateral feed part (21a) that feeds in the left and right direction on the upper side of the machine body, the descending feed part (21b) that follows, and the ascending feed part (21c) that returns to the starting end side are configured in a substantially inverted triangle in the rear view, The drive mechanism of the seedling supply mechanism (12) is the transmission case (6 The sprocket (57) is driven by a PTO shaft (50) extending rearward from the rear end, and the other end of the seedling transport drive chain (63) wound around the sprocket (57) is connected to the transport belt drive shaft (75). ) It is wound around a sprocket (69) loosely fitted thereon, and the conveyor belt drive shaft (75) is supported on one end of the upper lateral feed portion (21a) of the seedling supply mechanism (12), and the sprocket (69) And a conveyor belt drive shaft (75), a one-way clutch (70) that allows the conveyor belt (21) to be manually idled is interposed, and the transmission case (6) to the PTO shaft. An output shaft (81) driven in conjunction with (50) extends laterally, and power is transmitted from the output shaft (81) to the planting device (13) via a transmission shaft (80). The seedling supply mechanism (12) Wherein by releasing the connection of the PTO shaft (50), seedling transplantation machine, characterized in that the removable structure from the transmission case (6) and the handle frame (7). The seedling transplanter according to claim 1, wherein the one-way clutch (70) includes a one-way cam (71) fixed on the conveyor belt drive shaft (75), and one of the one-way cams (71) is provided. A seedling transplanting machine characterized in that the conveyor belt (21) is configured to be fed by one seedling by manually idling the level difference .

Images