JP2016174615A - Transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a take-out mechanism which improves take-out precision of a seedling.SOLUTION: A take-out device 200 includes a push-out mechanism 280 pushing out a transplant object. The push-out mechanism 280 includes a push-out rod 281 including a notch 281b. When the push-out rod 281 performs push-out motion, tips of a pair of take-out jaws 261L, 261R pass through the notch 281b. The push-out rod 281 is flat on an upper part. The pair of take-out jaws 261L, 261R are plate-shaped. The push-out rod 281 covers an upper part of tips 261Lp, 261Rp of the pair of take-out jaws 261L, 261R. The push-out rod 281 is caused to retreat in accordance with an insertion speed of the tips 261Lp, 261Rp of the pair of take-out jaws 261L, 261R.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a transplanter that takes out a transplant from a tray containing a transplant to be transplanted and implants the transplant in a field.

  Conventionally, a transplanter has a seedling supply device for placing a seedling tray provided with a large number of pots vertically and horizontally on a traveling machine, a seedling planting device for planting seedlings in a basket, and a seedling from a seedling tray of the seedling supply device. There is known one that is configured to include a seedling removal device that is taken out one by one and supplied to a seedling planting device (see, for example, Patent Document 1).

  In the seedling transplanting machine described in Patent Literature 1, the seedling extraction device is disposed on the front side of the seedling supply device, and includes a pair of seedling extraction claws and a control mechanism that controls operations of the pair of seedling extraction claws. ing.

  As a result, the pair of seedling extraction claws move to the pot position of the seedling tray, which is the seedling extraction position, and the root pot of the seedling grown in the pot is pierced from above the pot opening to remove the seedling from the pot. After taking out and transporting the seedlings to a position above the seedling planting tool of the seedling planting device which is the seedling release position, the seedlings are released toward the seedling planting tool.

JP 2001-69817 A

  However, in the conventional seedling transplanting machine described above, the operation of moving the pair of seedling picking claws to the pot position of the seedling tray serving as the seedling seeding picking position is performed by the crank pin of the crank body rotating about the rotating shaft. The movement of the oscillating arm that oscillates when engaged, and the movement of the push-out link that oscillates via the cam plate by the rotating crank pin, are governed by roughly two movements. Since the mechanism for performing the operation is complicated, there has been a problem that the position where the pair of seedling extraction claws move easily shifts.

  An object of the present invention is to provide a transplanter that can improve the accuracy of taking out a transplant of an extraction device in consideration of the problems of the conventional transplanter.

  In order to solve the above-mentioned problem, in order to solve the above-mentioned problem, the first present invention includes a tray supply device (100) for supplying a tray (20) containing the implant (22), and the implant. A planting device (7) for planting in a field, and a takeout device (200) for taking out the implant from the tray (20) of the tray supply device (100) and supplying it to the planting device (7), The take-out device (200) is configured such that the guided members (245, 247) provided at two locations of the take-out tool (250, 260) move while being guided by a common guide portion (240), thereby (250, 260) is a transplanter (1) in a supply state in which the posture is changed from an extraction state in which the transplant (22) is taken out from the tray (20) and supplied to the planting device (7), Drive from the body of the transplanter A drive arm (220) that rotates by force, a connection arm (230) having one end rotatably connected to the tip of the drive arm, and one end of one guided member (245) and the connection arm (230) is connected to the other end, and the extraction tool (250, 260) has a pair of extraction claws (261L, 261R) for extracting the implant, and the one guided member (245) ), Which is fixed to the other end of the pair of take-out claws (261L, 261R), and the cam (270) from the drive arm (220) through the one guided member (245). 270) and a transmission mechanism (290, 291, 292, 293) for rotating the cam (270) in accordance with the drive cycle of the drive arm (220), and the take-out device ( 200 Has an extruding mechanism (280) for extruding the implant (22), and the extruding mechanism (280) has an extruding rod (281) formed with a notch (281b), and the extruding rod (281). ) Is pushed out, the tip of the pair of extraction claws (261L, 261R) passes through the notch (281b), and the push rod (281) is configured to have a flat upper portion. The pair of extraction claws (261L, 261R) are configured in a plate shape, and the transmission mechanism (290) includes a first gear (291), a second gear (292), and a third gear (293). The first gear (291) is fixed to the drive arm (220), and the third gear (291) is configured to transmit the driving force to the cam shaft (271) of the cam (270). 293) is the camshaft ( 271) is fixed to the one guided member (245), and the second gear (292) is fitted to both the first gear (291) and the third gear (293). The cutout portion (281b) moves while pushing and widening the distal ends of the pair of extraction claws (261L, 261R), and the push rod (281) 261L, 261R) is configured to cover the top end portion (261Lp, 261Rp), and the push rod (281) is inserted into the tip end portion (261Lp, 261Rp) of the pair of extraction claws (261L, 261Rp). It is a transplanter characterized by retreating at a speed.

  According to a second aspect of the present invention, the common guide portion (240) includes a guide groove (241), and the guide groove (241) includes a straight portion and a bent portion bent following the straight portion. In the extracted state, the two guided members (245, 247) are both guided by the linear portion, and the extraction tool (250, 260) holding the implant is the tray (20). After that, when one guided member (245) moves to the bent portion and is guided, the extraction tool (250, 260) changes its posture toward the supply state. 1 is a transplanter according to the first aspect of the present invention.

  In the third aspect of the present invention, the cam (270) has a configuration in which the thickness of the outer peripheral portion differs depending on the location, and the pair of extraction claws (261L, 261R) is opened and closed by the change in the thickness. An extruding mechanism (280) for extruding the implant held by the pair of extraction claws (261L, 261R) according to a change in the outer diameter, the outer diameter of the cam (270) being different depending on the location. The transplanter according to the first or second aspect of the present invention, wherein the transplanter is operated.

  According to a fourth aspect of the present invention, the cam (270) is located between the pair of extraction claws (261L, 261R), and the cam (270) has a non-uniform thickness. The pair of extraction claws (261L, 261R) are opened and closed, and the push-out mechanism (280) pushes the implant toward the planting device (7) by changing the outer shape of the cam (270). The transplanter according to any one of the first to third aspects of the present invention.

  According to a fifth aspect of the present invention, the tray supply device (100) includes a tray vertical feeding device (120) that intermittently feeds the tray (20) in the vertical direction along the tray conveyance path (111), A tray transport path moving device (170) that moves the tray transport path (111) in the left-right direction, and the tray vertical feeding device (120) protrudes from the back surface side of the tray (20) to the back surface side. The pot portions (21) are inserted between the pot portions (21) and moved downward to feed the tray (20) by one horizontal row of the pot portions. And a feed rod arm (130) formed with a protruding cam (131) having a curved edge (131a) fixed to the tray feeder (121). ) The feed rod arm (130) is rotatably supported, and the first concave portion (143a), the second convex portion (143b), and the third concave portion (143c) are continuously formed on the edge portion in a side view. The tray transport path includes a feed arm (140) and a longitudinal feed drive arm (150) which is fixed to the pivoting longitudinal feed pivot shaft (151) and has a check roller (152) at the tip. The moving device (170) is provided on the back side of the tray conveyance path, and is provided above the lead cam shaft (171) and the lead cam shaft (171) for moving the tray conveyance path in the left-right direction. A guide rail (155) for guiding the movement of the path (111), and the tray transport path (111) is supported by the lead cam shaft (171) and the guide rail (155). As a result of the rotation of the longitudinal feed drive arm (150), the restraining roller (152) moves the curved edge (131a) of the feed rod arm (130) and the first of the feed arm (140). The tray feeder (121) comes into contact with the concave portion (143a) and comes out from between the pot portions (21), and the tray feeder (121) is between the pot portions (21). Since the check roller (152) continues to contact the curved edge portion (131a) of the feed rod arm (130) after coming out, the tray feeder (121) is connected to the pot portions (21). The check roller (152) is in contact with the second convex portion (143b) of the feed arm (140) while maintaining the state of being pulled out from the space, and is moved upward by one horizontal row of the pot portion. After the tray feeder (121) has moved upward by one horizontal row of the pot portion, the check roller (152) is moved to the curved edge portion (131a) of the feed rod arm (130). And the tray feeder (121) moves between the pot portions (21), and the tray feeder (121) is between the pot portions (21). After the movement toward the second position, the check roller (152) comes into contact with the third recess (143c) of the feed arm (140), and the tray feeder (121) moves between the pot portions (21). Any one of the first to fourth aspects of the present invention, wherein the tray (20) is moved by one horizontal row of the pot portion while moving in a state where it is in between. Is a transplant machine.

  According to the first aspect of the present invention, the support structure of the extraction tool (250, 260) is simplified, and the extraction accuracy is improved.

  In addition, according to the first aspect of the present invention, the position and posture of the extraction tool (250, 260) can be appropriately and smoothly controlled with a simple structure.

  Further, according to the first aspect of the present invention, the cam (270) can be disposed in the vicinity of the extraction claws (261L, 261R), and the opening / closing mechanism of the extraction claws (261L, 261R) can be simplified.

  Further, according to the first aspect of the present invention, when the push rod (281) is pushed out, the distal ends of the pair of extraction claws (261L, 261R) pass through the notch (281b) and the notch (281b) is a pair. Since the tip of the take-out claw (261L, 261R) is moved while being spread out, the soil or the like adhering to the tip is removed.

  Further, according to the first aspect of the present invention, the extrusion rod (281) has a flat upper portion and covers the upper ends of the pair of extraction claws (261L, 261R) (261Lp, 261Rp). (20) The upper implant can be prevented from being caught by the distal ends (261Lp, 261Rp) of the extraction claws (261L, 261R).

  In addition, according to the first aspect of the present invention, the push rod (281) is retracted in accordance with the insertion speed of the distal ends (261Lp, 261Rp) of the pair of extraction claws (261L, 261R), so that the implant is retracted (261Lp). , 261Rp) can be prevented.

  Further, according to the second aspect of the present invention, the position and posture of the extraction tool (250, 260) from the time when the transplant is taken out in the take-out state to the time when the implant is supplied in the supply state are determined only for the common guide (241). Can be controlled appropriately and smoothly.

  According to the third aspect of the present invention, the opening and closing of the extraction claws (261L, 261R) and the extruding of the implant (22) by the extruding mechanism (280) can be performed by one cam (270), thereby simplifying the structure. I can plan.

  Further, according to the fourth aspect of the present invention and according to the fourth aspect of the present invention, the position and posture of the extraction tool (250, 260) can be appropriately and smoothly controlled with a simple structure.

  Further, the cam (270) can be disposed in the vicinity of the extraction claws (261L, 261R), and the opening / closing mechanism of the extraction claws (261L, 261R) can be simplified.

  Further, according to the fifth aspect of the present invention and the fifth aspect of the present invention, the tray vertical feeding device (120) can be made compact.

  Further, the tray transport path moving device (170) can be supported so as to be movable left and right with a simple structure.

Left side view of a seedling transplanter according to an embodiment of the present invention The top view of the seedling transplanting machine of embodiment of this invention The perspective view of the tray supply apparatus of embodiment of this invention The schematic side view which shows the structure of the tray vertical feeding apparatus of embodiment of this invention Schematic perspective view of the take-out device of the embodiment of the present invention Schematic side view of the take-out device as seen from the upper left back side of the paper of FIG. The schematic diagram which shows the rough correspondence of the position on the locus | trajectory of the front-end | tip part of a pair of extraction nail | claw, and the position of rotation of a seedling drive arm in the extraction apparatus of embodiment of this invention The schematic side view which shows the structure of the 1st intermittent gear and the 2nd intermittent gear as a modification of the taking-out apparatus of embodiment of this invention

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

(Embodiment)
FIG. 1 shows a side view of a seedling transplanter according to an embodiment of the present invention, and FIG. 2 shows a plan view.

  FIGS. 1 and 2 show a seedling transplanting machine 1 for transplanting seedlings such as vegetables. An engine E as a driving source is mounted on the front of the vehicle body, and traveling wheels 2, 3 are mounted on the front and rear of the vehicle body. And the rotational power of the engine E is transmitted to the rear wheel 3 via the mission device in the mission case 4.

  The seedling transplanter 1 according to this embodiment includes a tray supply device 100 that supplies a tray 20 that stores seedlings 22 (see FIG. 3), a planting device 7 that plants the seedlings 22 in a field, and a tray of the tray supply device 100. While taking out seedlings 22 from 20 and supplying them to the planting device 7, etc., the take-out device 200 and the like are provided, and the aircraft is advanced with the pair of left and right front wheels 2 and 2 and the pair of left and right rear wheels 3 and 3 straddling the heel U. The seedlings 22 accommodated in the tray 20 are automatically planted on the upper surface of the ridge U. The operator is configured to steer the aircraft with the steering handle 8 while walking behind the aircraft.

  The traveling unit is provided with a machine body control mechanism that moves the pair of left and right rear wheels 3 and 3 up and down relative to the machine body to control the machine body position.

  Between the traveling transmission case 9 of the pair of left and right rear wheels 3 and 3 and the traveling vehicle body, an elevating cylinder 10 that elevates and lowers the airframe by raising and lowering the wheels is provided. The pair of rear wheels 3 and 3 move up and down in the same direction by the same amount, and the body moves up and down.

  FIG. 3 is a perspective view of the tray supply device 100, and FIG. 4 is a schematic side view showing the configuration of the tray vertical feeding device 120 of the tray supply device 100.

  The tray 20 is formed by connecting a plurality of seedling pots 21 vertically and horizontally, is formed of plastic, and is configured to retain flexibility. Each seedling pot 21 is connected on the front surface side, and the back surface is in an independent form.

  The tray supply device 100 includes a seedling table 110 having a tray conveyance path 111 inclined downward to support the bottom of the tray 20, and a tray vertical feeding apparatus that intermittently feeds the tray 20 in the vertical direction along the tray conveyance path 111. 120 and a tray transport path moving device 170 (see FIG. 2) for moving the seedling table 110 having the tray transport path 111 in the left-right direction.

  Also, the tray vertical feeding device 120 enters between the seedling pots 21 protruding from the back side of the tray 20 to the back side, and moves downward to feed the tray 20 by one horizontal row of the seedling pot 21. The tray feed rod 121 is configured to move out from between the seedling pots 21 and move upward by the horizontal row of the seedling pots 21.

  The tray feed rod 121 is configured such that a central portion 121a can enter and exit from a retreat groove 111a provided at a lower portion of the tray conveyance path 111, and both end portions 121b are bent at a right angle so as to be outside of both sides of the tray conveyance path 111. The configuration is such that the tray 20 does not get in the way when the tray 20 moves on the tray conveyance path 111.

  Further, the tray transport path moving device 170 is provided on the back side of the tray transport path 111 and obtains a driving force from the main body side of the seedling transplanter 1 to move the seedling table 110 having the tray transport path 111 in the left-right direction. A lead cam shaft 171 and a guide rail 155 provided above the lead cam shaft 171 and guiding movement in the left-right direction of the seedling table 110 having the tray transport path 111 are provided.

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

  When the tray 20 is inserted from above the seedling mount 23 so as to be sandwiched between the tray conveyance path 111 and the presser frame 25, the tip of the feed rod 121 is engaged with the groove on the back side of the tray 20, In this state, the feed rod 121 rotates while drawing a substantially square locus A in a side view, whereby the tray 20 is intermittently vertically fed along the tray conveyance path 111 in an obliquely downward direction.

  A mechanism for intermittently feeding the tray 20 vertically using the feed rod 121 will be described later.

  On the other hand, the take-out device 200 is disposed at a position facing the lower end portion of the seedling placing table 23, and the tip of the take-out claw 210 operates so as to draw a trajectory K. The seedlings 22 are sequentially taken out and supplied to the planting device 7.

  Next, the configuration of the extraction device 200 provided in the seedling transplanting apparatus 1 of the present embodiment will be mainly described with reference to FIGS. 5 and 6.

  FIG. 5 is a schematic perspective view of the take-out device 200, and FIG. 6 is a schematic side view of the take-out device 200 as seen from the upper left back side of the paper surface of FIG.

  As shown in FIGS. 5 and 6, the take-out device 200 is rotatably held by an take-out device fixing member 201 fixed to the main body of the seedling transplanter 1, and the main body side drive source is connected via a chain belt 202. A drive arm 220 that is rotated in the same direction by a drive shaft 203 that is rotated in the direction of arrow B by power, a connecting arm 230 in which one end portion 230a is rotatably connected to a distal end side portion 220a of the drive arm 220; A plate-like member that is held on the take-out device fixing member 201 by fixing pins 201a and 201b and has an outer shape of an approximately J letter, and the side closer to the tray supply device 100 is straight and the far side is substantially R-shaped. And a guide portion 240 having a guide groove 241 that has a shape rising up.

  Further, the take-out device 200 includes a first guided member 245 that is integrated with a cam shaft 271 to be described later and inserted into the guide groove 241 so as to be smoothly slidable without shaking. The substrate 250 is connected to the member 247, protrudes from one end of the side surface to which the guided members are connected, and is bent at a substantially right angle, and the substrate 250 protrudes perpendicularly from the bent portion 251 of the substrate 250. A pair of left and right extraction claw holding pins 252L and 252R, which are movably held, and a root portion are attached to a pair of left and right extraction claw holding pins 252L and 252R, respectively, and the width of the tip portion is narrowed into a tweezers. 21 and a pair of extraction claws 261L, 261R for taking out the seedling 22 in the 21 and a base portion side of the inner surface portion of the pair of extraction claws 261L, 261R facing each other. A take-out member 260 and a spring 263 pulling the opposite ends is mounted, and a.

  In addition, an example of the structure including the board | substrate 250 and the extraction member 260 of this Embodiment corresponds to the extraction tool of this invention.

  Further, the take-out device 200 is a cam 270 having a cam shaft 271 integrated with the first guided member 254, which is pivotably penetrated through the substrate 250, and is related to the thickness of the outer peripheral portion of the cam 270. The outer peripheral portion 272 whose thickness varies depending on the location of the outer peripheral portion when contacting the front end surfaces of the pair of left and right claw tip width regulating projections 262L, 262R provided on the inner surface portions of the pair of extraction claws 261L, 261R. And an outermost edge portion 273 whose outer diameter changes depending on the position of the outermost edge portion with respect to a distance (also referred to as an outer diameter) of the outermost edge portion of the cam 270 from the axis center of the cam shaft 271. The cam 270 is pivotally connected to the substrate 250, and is removed from the seedling pot 21 along the pair of take-out claws 261L and 261R by a change in the outer diameter of the outermost edge 273 of the cam 270. Take-out pawl 261L, and a, a pushing mechanism 280 for pushing the seedlings 22 held by 261R.

  Further, the edge portion 245 a near the tip of the first guided member 245 that is integral with the cam shaft 271 is rotatably connected to the other end 230 b of the connecting arm 230. The first guided member 245 that is integral with the camshaft 271 passes through a transmission mechanism 290 including a first gear 291, a second gear 292, and a third gear 293 by the rotational force of the drive arm 220. The driving force is transmitted to the cam shaft 271 in accordance with the driving cycle of the driving arm 220 by being rotated.

  Further, when the outer peripheral portion 272 of the cam 270 comes into contact with the front end surfaces of the pair of left and right claw tip width regulating protrusions 262L and 262R provided on the inner surface side of the pair of extraction claws 261L and 261R, the outer peripheral portion 272 of the cam 270 The pair of extraction claws 261L and 261R is opened and closed by the interaction between the change in thickness and the restoring force of the tension spring 263.

  Next, the transmission mechanism 290 will be further described.

  That is, the first gear 291 is fixed to the distal end side portion 220a of the drive arm 220, and is rotatably attached to the connection arm 230 via the first rotation shaft 291a. Further, the third gear 293 is fixed to the tip end portion 245 b of the first guided member 245 that is integral with the cam shaft 271, and the edge portion 245 a near the tip end of the first guided member 245 is connected to the connecting arm 230. Therefore, the third gear 293 is rotatably held with respect to the connecting arm 230. Therefore, the third gear 293 rotates integrally with the first guided member 245. The second gear 292 is rotatably attached at the center position of the interlocking arm 220, and is sandwiched between both the first gear 291 and the third gear 293 and is fitted to both gears.

  Next, the extrusion mechanism 280 will be further described mainly with reference to FIG.

  The extruding mechanism 280 pushes out the seedling 22 held by the pair of extraction claws 261L, 261R. The tip portion 281a is bent at a right angle to form a notch 281b that matches the width of the tip portion of the extraction claws 261L, 261R. An extrusion rod 281 and a connecting rod 282 bent at a substantially right angle, one end portion 282a of which is rotatably inserted into a rear end hole portion 281c provided at the rear end portion of the extrusion rod 281. The connecting rod 282 held by a pull-out preventing pin (not shown), the other tip 282b of the connecting rod 282 are fixed to the upper end 283a, and the lower end 283b is fixed to the substrate 250 by the push arm connecting shaft 283d. A push-out arm 283 that is pivotally attached and provided with a tension spring holding first projection 283c in the center, and one end of the tension spring holding first projection. Hooked to 83c, the other end is provided with a spring 284 pulling the push-out arm hooked to the second projection 250a for the tension spring held fixed to the substrate 250.

  Then, when the cam 270 rotates in the direction of arrow B, the protruding portion 273b having an outer diameter larger than that of the other portion 273a in the outermost edge portion 273 is the outer peripheral edge portion of the root portion of the first projection 283c for holding the tension spring. , The push-out arm tension spring 284 is extended, and the push-out arm 283 is swung counterclockwise in FIG. 6 so that the push-out rod 281 connected by the connecting rod 282 moves backward. Yes (see arrow C). Further, when the cam 270 rotates in the direction of arrow B, the other portion 273a having an outer diameter smaller than the protruding portion 273b in the outermost edge portion 273 is the outer peripheral edge portion of the root portion of the first projection 283c for holding the tension spring. , The push-out arm tension spring 284 is contracted, and the push-out arm 283 is rotated clockwise in FIG. 6 so that the push-out rod 281 connected by the connecting rod 282 protrudes (arrow). D). Each time the push rod 281 protrudes, the tip of the pair of extraction claws 261L and 261R passes through the notch 281b provided in the tip 281a of the push rod 281. It is a configuration that removes the soil that had been removed.

  Here, although the extrusion rod 281 has a flat upper portion, it can prevent the leaves of the seedling 22 from being entangled with the pair of extraction claws 261L and 261R.

  Next, the operation of the take-out device 200 will be described with reference to FIGS.

  As described above, the guide portion 240 does not move because it is firmly fixed to the extraction device fixing member 201 fixed to the main body of the seedling transplanter 1.

  As the drive arm 220 rotates, the connecting arm 230 swings. The movement of the connecting arm 230 passes through the guide groove 241 formed in the guide portion 240 and is connected to the substrate 250. Regulated by H.245.

  On the other hand, the substrate 250 also swings along with the movement of the connecting arm 230. In addition to the first guided member 245, the second guided member 247 penetrates the guide groove 241 in the substrate 250. Since the second guided member 247 is not connected to the connecting arm 230, the movement repeats reciprocating movement along the guide groove 241. Since the extraction member 260 is attached to the substrate 250, the extraction member 260 also moves in the same manner as the substrate 250, and the distal ends 261Lp and 261Rp of the pair of extraction claws 261L and 261R have the locus shown in FIGS. Draw K.

  Here, FIG. 7 is a schematic diagram showing a general correspondence relationship between the rotation position of the drive arm 220 and the position on the locus K of the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R. The rotation positions P1 to P6 of the drive arm 220 shown in FIG. 7 correspond to the positions K1 to K6 on the locus K of the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R. In addition, the arrow described on the broken line which shows the locus | trajectory K has shown the operation | movement direction.

  As shown in FIG. 7, the operation of the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R from the position K1 to the position K2 corresponds to the operation of extracting the seedling 22 from the seedling pot 21. Since the locus K from the position K1 to the position K2 is linear, the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R recede straight from the seedling pot 21. At this time, the force in the direction approaching each other acts on the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R by the restoring force of the tension spring 263, and the seedlings 22 extracted from the seedling pot 21 are held. I can do it. The opening / closing operation of the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R will be described later together with the operation of the push rod 281.

  The movement of the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R from the position K6 toward the position K1 is performed with respect to the seedlings 22 in the breeding pot 21 of the tray 20 at the seedling extraction position. 261L, 261R is inserted, and moves in the opposite direction along the path K from the position K1 to the position K2, so that the tips 261Lp, 261Rp of the pair of extraction claws 261L, 261R It is inserted almost straight into the pot 21. At this time, the force in the direction away from each other acts against the restoring force of the tension spring 263 on the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R, and both the tip portions are open. You can enter the seedling pot 21.

  Thus, the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R do not damage the tray 20, the seedling pot 21, and the seedling itself.

  The trajectory K from the position K1 to the position K2 and the trajectory K from the position K6 to the position K1 are substantially linear. The side near the tray supply device 100 of the guide groove 241 is linear. It is because it is done.

  Next, as moving from the position K2 to the position K3, the tip portions 261Lp and 261Rp of the pair of take-out claws 261L and 261R change their postures from the posture facing the seedling pot 21 until then substantially downward. When moved to the position K4, the tip portions 261Lp and 261Rp are substantially directed downward.

  The reason why the posture is suddenly changed substantially downward as described above is that the side of the guide groove 241 far from the tray supply device 100 is formed in a shape that rises in a substantially R shape.

  At that time, just below the tip portions 261Lp and 261Rp, the seedling insertion port (not shown) of the planting device 7 in the ascending process on the locus T1 (see FIG. 1) is directed upward toward the top dead center. The seedling 22 pushed out from the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R by the push rod 281 falls to the seedling inlet of the planting device 7 between the position K4 and the position K5. Supplied to the seedling planting tool 11. The operation of the push rod 281 will be further described later.

  Next, from the position K5 toward the position K6, the tip portions 261Lp and 261Rp of the pair of take-out claws 261L and 261R abruptly move so that the posture that has been directed substantially downward until then can be opposed to the next seedling pot 21. The tip portions 261Lp and 261Rp are inserted into the new seedling pot 21 when the position is changed to move to the position K1.

  As can be seen from the approximate correspondence between the rotation position of the drive arm 220 and the positions of the tip ends 261Lp and 261Rp of the pair of extraction claws 261L and 261R on the locus K shown in FIG. Since the movement toward is performed more slowly than the movement from the position K1 to the position K2 described above, the removal of the seedling 22 from the seedling pot 21 can be performed quickly and the release of the seedling 22 to the planting device 7 is ensured. Can be done.

  Such an operation is performed because the connecting arm 230 is provided in front of the drive arm 220 (the extraction position of the tray supply device 100). Further, since the drive arm 220 is farther from the extraction position of the tray supply device 100 than the connection arm 230, it does not come into contact with the seedling 22 when the seedling 22 is taken out.

  Next, operations of the transmission mechanism 290 and the extrusion mechanism 280 will be mainly described with reference to FIGS. 5, 6, and 7.

  As shown in FIG. 5, the first gear 291 fixed to the distal end side portion 220 a of the drive arm 220 by the rotation of the drive arm 220 in the B direction moves in the B direction around the rotation fulcrum 220 b of the drive arm 220. Revolve. The first gear 291 is rotatably attached to the connecting arm 230 via the first rotation shaft 291a, and rotates the third gear 293 in the B direction via the second gear 292. The third gear 293 is fixed to the leading end 245 b of the first guided member 245 that is integral with the cam shaft 271, and the leading edge vicinity 245 a of the guided member 245 is connected to the other end of the connecting arm 230. Since the third gear 293 is rotated, the cam 270 is rotated in the B direction via the cam shaft 271 because the third gear 293 is rotated. That is, the cam 270 rotates in accordance with the drive cycle of the drive arm 220.

  The cam 270 has an outer peripheral portion 272 whose thickness varies depending on the location, and an outermost edge portion 273 whose distance (outer diameter) from the shaft center of the cam shaft 271 varies depending on the location. As shown, the protruding portion 273b in the outermost edge portion 273 has a larger outer diameter than the other portion 273a, and the thickness of the first range 272a is within the outer peripheral portion 272 at the same distance from the axial center of the cam shaft 271. The thickness is set smaller than the thickness of the second range 272b which is the remaining thick portion.

  With the above configuration, when the cam 270 rotates in synchronization with the drive cycle of the drive arm 220, the distal ends 261Lp and 261Rp of the pair of extraction claws 261L and 261R move from the position K6 to the position K1. The opening / closing operation of the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R and the operation of the push rod 281 are as follows.

  That is, the second range 272b, which is a thick portion of the outer peripheral portion 272 of the cam 270, comes into contact with the tip surfaces of the pair of left and right claw tip width restricting projections 262L and 262R, whereby a pair of extraction claws 261L and 261R The front end portions 261Lp and 261Rp are opposed to the restoring force of the tension spring 263, and force in directions away from each other is acting, and both the front end portions are open.

  On the other hand, at this time, the protrusion 273b of the outermost edge 273 of the cam 270 is in contact with the outer peripheral edge of the base portion of the first projection 283c for holding the tension spring, so that the push arm tension spring 284 is pulled. The pushing arm 283 is rotated counterclockwise in FIG. 6 (see arrow C), and the pushing rod 281 connected by the connecting rod 282 is maintained in the retracted state.

  Therefore, the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R can enter the seedling raising pot 21 and take out the seedling.

  Next, the opening / closing operation of the pair of extraction claws 261L, 261R, 261Lp, 261Rp when the tip portions 261Lp, 261Rp of the pair of extraction claws 261L, 261R perform the operation from the position K1 toward the position K2, and the extrusion The operation of the rod 281 is as follows.

  That is, at the same time when the operation from the position K1 toward the position K2 is started, the first range 272a, which is a thin portion of the outer peripheral portion 272 of the cam 270, is connected to the tip surfaces of the pair of left and right claw tip width regulating projections 262L and 262R. By making contact, the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R move toward each other due to the restoring force of the tension spring 263, so that both tip portions are closed.

  On the other hand, at this time, the protrusion 273b of the outermost edge 273 of the cam 270 is still in contact with the outer peripheral edge of the base portion of the first projection 283c for holding the tension spring, so that the push-out arm tension spring 284 is The pusher arm 283 is stretched and maintained in a state of rotating counterclockwise in FIG. 6 (see arrow C), and the pusher rod 281 connected by the connecting rod 282 is maintained in the retracted state. Yes. Therefore, the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R can hold the extracted seedling 22 firmly at the tip portion and move to the planting device 7 side as it is.

  Next, the opening / closing operation of the pair of extraction claws 261L, 261R, 261Lp, 261Rp when the tip portions 261Lp, 261Rp of the pair of extraction claws 261L, 261R perform the operation from the position K4 toward the position K5, and extrusion The operation of the rod 281 is as follows.

  That is, at the same time when the operation from the position K4 toward the position K5 is started, the other portion 273a of the outermost edge portion 273 of the cam 270 is replaced with the outer peripheral edge of the root portion of the first protrusion 283c for holding the tension spring. 6, the pushing arm 283 instantaneously turns clockwise in FIG. 6 by the restoring force of the pushing arm tension spring 284 (see arrow D), and the pushing arm connected by the connecting rod 282. At the same time as the rod 281 is pushed out, the cutout part 281b of the tip part 281a of the push rod 281 moves while expanding the tip parts of the pair of extraction claws 261L, 261R.

  As a result, the seedling 22 pushed out from the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R by the tip portion 281a of the extrusion rod 281 falls to the seedling insertion port of the planting device 7 to the seedling planting tool 11. Supplied. At this time, the cutout portion 281b of the distal end portion 281a of the push rod 281 moves while pushing and expanding the distal end portions of the pair of extraction claws 261L and 261R, so that the dirt or the like attached to the distal end portion is simultaneously removed. It is.

  Next, the opening / closing operation of the pair of extraction claws 261L, 261R, 261Lp, 261Rp when the tip portions 261Lp, 261Rp of the pair of extraction claws 261L, 261R perform the operation from the position K5 to the position K6, and extrusion The operation of the rod 281 is as follows.

  That is, in the outer peripheral portion 272 of the cam 270, the second range 272b which is a thick portion instead of the first range 272a which is a thin portion is in contact with the tip surfaces of the pair of left and right claw tip width regulating projections 262L and 262R. By doing so, the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R change to a state in which both tip portions are opened due to the force in the direction away from each other against the restoring force of the tension spring 263. To do.

  On the other hand, when coming to the vicinity of the position K6, the projecting portion 273b of the outermost edge portion 273 of the cam 270 contacts the outer peripheral edge portion of the base portion of the first projection 283c for holding the spring spring instead of the other portion 273a. Thus, the push arm tension spring 284 is extended, the push arm 283 is swung counterclockwise in FIG. 6 (see arrow C), and the push rod 281 connected by the connecting rod 282 is retracted. Change to state.

  In the above-described embodiment, the case where the pair of extraction claws 261L and 261R are integrally formed of the same metal plate member from the root portion to the distal end portion has been described. About the front end side, it may be made of, for example, a rubber plate or a resin plate that can be detached and has elasticity. Thereby, even if the tip part grasps the seedling 22 by the restoring force of the tension spring 263, the rubber plate is deformed by the elasticity of the tip side, so that the seedling 22 is not crushed.

  Further, the push rod 281 covers the upper ends of the pair of extraction claws 261L and 261R until the distal ends 261Lp and 261Rp of the pair of extraction claws 261L and 261R move in the vicinity of the position K6. Although configured, this can prevent the leaves of the seedling 22 on the tray 20 from being caught by the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R when moving from the position K5 to the position K6.

  In addition, the push rod 281 is configured to be retracted in accordance with the insertion speed when the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R are inserted into the seedling pot 21, thereby the leaves of the seedling 22 Can be prevented from being entangled with the end portions 261Lp and 261Rp.

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

  As shown in FIG. 4, the tray vertical feeding device 120 has the above-described tray feeding rod 121 and a protrusion having a curved edge portion 131a in which one end 121b1 of both end portions 121b of the tray feeding rod 121 is fixed and one side is curved inward. A feed rod arm 130 having a cam 131 formed at the bottom and a root portion 141 are rotatably supported by the side plate 110a of the seedling table 110, and the feed rod arm 130 is rotatably supported by the tip portion 142. The feed arm 140 in which the first concave portion 143a, the second convex portion 143b, and the third concave portion 143c are formed smoothly and continuously in a side view at the lower end edge, and the driving force obtained from the power source of the seedling transplanter 1 is an arrow. When viewed from the side of the take-out device 200, the longitudinal feed pivot shaft 151 that pivots in the E direction is fixed at two positions, the center position and the right end position of the longitudinal feed pivot shaft 151, respectively. It includes a longitudinal feeding drive arm 150 having a control roller 152 to rotatably a.

  Further, a feed arm tension spring 160 is attached between the front end portion 142 of the feed arm 140 and the lower portion 110a1 of the side plate 110a of the seedling table 110 so that a downward pulling force is always applied to the feed arm 140. ing. Further, a spring mounting rod 163 that holds the other end of the feed rod arm tension spring 161 having one end attached to the pin 132 attached to the upper end portion of the feed rod arm 130 is fixed to the root portion 141 of the feed arm 140. Has been.

  Next, the intermittent operation of the tray feed rod 121 will be described with reference to FIGS.

  It is assumed that the seedling table 110 is moved in the right direction, that is, in the direction of arrow F (see FIG. 3) by the rotation of the lead cam shaft 171. At that time, the longitudinal feed rotation shaft 151 is rotated in the direction of arrow E (see FIG. 4).

  In the meantime, the take-out device 200 sequentially takes out the seedlings 22 from the seedling pot 21 at the right end and supplies the seedlings 22 to the planting device 7, and then the leftmost end when the seedling placement stand 110 moves to the rightmost end. The seedling 22 of the nursery pot 21 is taken out by the take-out device 200. Thereby, all the seedlings 22 for one horizontal row of the seedling pot 21 are taken out.

  At this time, it is rotatably attached to the front end portion of the vertical feed drive arm 150 which is rotated in the direction of arrow E together with the vertical feed rotary shaft 151 and which is fixed to the right end of the vertical feed rotary shaft 151. The check roller 152 starts to contact the curved edge 131a of the feed rod arm 130 and the first recess 143a of the feed arm 140 and continues to rotate as it is.

  As a result, the feed rod 121 rotates counterclockwise about the axis of the tip 142, and the feed arm 140 rotates clockwise about the axis of the root 141, so that the back side of the seedling pot 21 until then. As a result, the central portion 121a of the feed rod 121 that has been waiting in the gap 21a moves in the direction of the arrow 121a1 (see FIG. 4).

  Thereafter, when the check roller 152 continues to rotate, the check roller 152 continues to contact the curved edge portion 131a of the feed rod arm 130, so that the central portion 121a of the feed rod 121 is positioned in the retreat groove 111a. At this time, the check roller 152 moves from the first concave portion 143a of the feed arm 140 toward the second convex portion 143b, so that the feed arm 140 further rotates clockwise and feeds. As a result, the central portion 121a of the rod 121 moves in the direction of the arrow 121a2 (see FIG. 4) while maintaining the state of being located in the retracting groove 111a.

  Thereafter, when the check roller 152 continues to rotate, the check roller 152 is not in contact with the curved edge portion 131a of the feed rod arm 130, and at the same time, the feed rod arm 130 is moved by the restoring force of the feed rod arm tension spring 161. By instantaneously rotating clockwise around the axis of the tip end portion 142, the central portion 121a of the feed rod 121 is moved from the gap 21a toward the gap 21b located on the upper side by one row of the seedling pot 21 in the direction of the arrow 121a3. Move as shown.

  Thereafter, when the check roller 152 continues to rotate, the check roller 152 moves while being in contact with the third recess 143 c of the feed arm 140, so that the feed arm 140 is moved downward by the restoring force of the feed arm tension spring 160. As a result, the central portion 121a of the feed rod 121 moves in the direction of the arrow 121a4 (see FIG. 4) while maintaining the state of being positioned in the gap 21b.

  And the center part 121a of the feed rod 121 which moved to the direction of the arrow 121a4 (refer FIG. 4) is maintaining the state located in the clearance gap between the seedling pots of the back side of the seedling pot 21, and the seedling stand 110 is the arrow. When the movement in the G direction, that is, the left direction is started, the take-out device 200 sequentially takes out the seedlings 22 from the seedling pot 21 at the left end and supplies the seedlings 22 to the planting device 7. At the time of movement, the seedling 22 in the rightmost seedling pot 21 is taken out by the take-out device 200. Thereby, all the seedlings 22 for one horizontal row of the seedling pot 21 are taken out.

  At this time, unlike the above, the check roller 152 rotatably attached to the distal end portion of the longitudinal feed drive arm 150 fixed at the center position of the longitudinal feed pivot shaft 151 is provided with the feed rod arm 130. The curved edge 131a and the first recess 143a of the feed arm 140 are brought into contact with each other.

  By repeating the above-described operation, the tray 20 is moved rightward or leftward, and is intermittently vertically fed by one row of the seedling pot 21.

  Thereby, the tray vertical feeding device 120 having a compact structure is obtained. Further, the tray conveyance path 111 can be supported so as to be movable left and right with a simple structure of the guide rail 155 and the lead cam shaft 171.

  In the above-described embodiment, the configuration in which the lead cam shaft 171 is continuously driven has been described.

  In other words, the first intermittent gear 300 shown in FIG. 8 is fixed to one end side of the continuously rotating vertical feed rotating shaft 151 shown in FIG. 4, and the second intermittent gear meshes intermittently with the first intermittent gear 300. A configuration may be adopted in which a gear 310 is provided and a driving force is transmitted to the lead cam shaft 171 using a power transmission member such as a chain belt (not shown) via the rotation shaft of the second intermittent gear 310. In this configuration, the first intermittent gear 300 is alternately provided with first regions 301 in which gear teeth are formed and second regions 302 in which gear teeth are not formed. The second intermittent gear 310 includes a third region 311 in which the number of teeth equal to the number of teeth in the first region 301 of the first intermittent gear 300 is formed, and a fourth region in which no gear teeth are formed. 312 is provided. FIG. 8 is a schematic side view showing the configuration of the first intermittent gear 300 and the second intermittent gear 310 as a modification of the above embodiment.

  With this configuration, when the first intermittent gear 300 is continuously rotated, while the teeth of the first region 301 are engaged with the teeth of the third region 311 of the second intermittent gear 310, the second intermittent gear 310 is Rotate. However, next, the second region 302 of the first intermittent gear 300 and the fourth region 312 of the second intermittent gear 310 face each other, and the first intermittent gear 300 continues to rotate as it is, but the teeth meshing with each other. Therefore, the second intermittent gear 310 temporarily stops rotating. Then, the teeth of the first region 301 of the first intermittent gear 300 again mesh with the teeth of the third region 311 of the second intermittent gear 310, and the rotation is resumed. As a result, the lead cam shaft 171 can be driven intermittently, so that the tray 20 can be moved in the left-right direction intermittently, and the tray 20, the seedling pot 21, and the seedling itself can be more reliably damaged. The seedling 22 can be taken out more accurately.

  In the above embodiment, the positional relationship between the connecting arm 230 and the driving arm 220 has been described with respect to the configuration in which the connecting arm 230 is provided in front of the driving arm 220 (the extraction position of the tray supply device 100). For example, the drive arm may be provided on the front side (the extraction position of the tray supply device 100) side of the connection arm. According to this configuration, since the operation of the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R at the extraction position of the seedling 22 is slower than the configuration described in the above embodiment, Although it can take out, the moving speed at the time of discharge | releasing the seedling 22 to the planting apparatus 7 becomes faster than the said structure.

  In the above-described embodiment, the rotation fulcrum 220b (see FIG. 6) of the drive arm 220 has been described as being substantially in the same position as the linear portion of the guide groove 241 when viewed from the side of the machine body. For example, the rotation fulcrum 220b may be disposed below the linear portion of the guide groove 241. In this case, at the extraction position of the seedling 22, the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R can increase the insertion speed when being inserted into the seedling pot 21, and can reduce the extraction speed. The seedling 22 can be extracted more reliably.

  Further, as the transplanter of the present invention, in the above-described embodiment, the tray supply apparatus 100 including the extraction apparatus 200 that is an example of the extraction apparatus of the present invention and the tray feed rod 121 that is an example of the tray supply apparatus of the present invention. However, the present invention is not limited thereto. For example, as another example of the transplanter of the present invention, an extractor 200 which is an example of the extractor of the present invention, a conventional tray supply device, It may be a seedling transplanter equipped with.

  The seedling transplanting machine according to the present invention has an effect of improving the accuracy of taking out the transplant of the extracting device, and is useful as a seedling transplanting machine for taking out seedlings from a pot portion of a tray and planting them in a field.

2 front wheel 3 rear wheel 4 mission case 5 tray supply device 6 take-out device 7 planting device 8 steering handle 9 travel transmission case 10 lifting cylinder 11 planting tool 20 tray 21 seedling pot 22 seedling 25 presser frame 100 tray supply device 110 seedling Table 111 Tray conveying path 155 Guide rail 200 Unloading device 201 Unloading device fixing member 201a Fixing pin 202 Chain belt 203 Drive shaft 220 Drive arm 230 Connection arm 240 Guide portion 241 Guide groove 250 Substrate 260 Unloading member 270 Cam 280 Extrusion mechanism

  The present invention relates to a transplanter that takes out a transplant from a tray containing a transplant to be transplanted and implants the transplant in a field.

  Conventionally, a transplanter has a seedling supply device for placing a seedling tray provided with a large number of pots vertically and horizontally on a traveling machine, a seedling planting device for planting seedlings in a basket, and a seedling from a seedling tray of the seedling supply device. There is known one that is configured to include a seedling removal device that is taken out one by one and supplied to a seedling planting device (see, for example, Patent Document 1).

  In the seedling transplanting machine described in Patent Literature 1, the seedling extraction device is disposed on the front side of the seedling supply device, and includes a pair of seedling extraction claws and a control mechanism that controls operations of the pair of seedling extraction claws. ing.

  As a result, the pair of seedling extraction claws move to the pot position of the seedling tray, which is the seedling extraction position, and the root pot of the seedling grown in the pot is pierced from above the pot opening to remove the seedling from the pot. After taking out and transporting the seedlings to a position above the seedling planting tool of the seedling planting device which is the seedling release position, the seedlings are released toward the seedling planting tool.

JP 2001-69817 A

  However, in the conventional seedling transplanting machine described above, the operation of moving the pair of seedling picking claws to the pot position of the seedling tray serving as the seedling seeding picking position is performed by the crank pin of the crank body rotating about the rotating shaft. The movement of the oscillating arm that oscillates when engaged, and the movement of the push-out link that oscillates via the cam plate by the rotating crank pin, are governed by roughly two movements. Since the mechanism for performing the operation is complicated, there has been a problem that the position where the pair of seedling extraction claws move easily shifts.

  An object of the present invention is to provide a transplanter that can improve the accuracy of taking out a transplant of an extraction device in consideration of the problems of the conventional transplanter.

In order to solve the above problems, a tray supply device (100) for supplying a tray (20) containing a transplant (22), a planting device (7) for planting the transplant in a field, and the tray supply device in the tray (20) from the take-off ported machine Ru with a (200) for supplying the removed the implant to the planting device (7) of the (100), the tray supply device (100), said tray ( 20) a tray vertical feeding device (120) that intermittently feeds the tray conveying path (111) vertically along the tray conveying path (111), and a tray conveying path moving device (170) that moves the tray conveying path (111) in the left-right direction. The tray transport path moving device (170) is provided on the back side of the tray transport path (111), and moves the tray transport path (111) in the left-right direction, and the lead cam shaft (171). A guide rail (155) is provided above the cam shaft (171) and guides the movement of the tray transport path (111). The tray transport path (111) guides the lead cam shaft (171). The transplanter is configured to be supported by a rail (155) .

Moreover, 2nd this invention enters between the pot parts (21) which protruded in the said back surface side from the back surface side of the said tray (20) , and the said tray vertical feeding apparatus (120) moves below. The tray (20) is fed by one horizontal row of the pot portion, and is pulled out from between the pot portions, and the tray feeder (121) configured to move upward by the horizontal row of the pot portion, A feed rod arm (130) fixed to the tray feeder (121) and formed with a protruding cam (131) having a curved edge (131a), and the feed rod arm (130) are rotatably supported. A feed arm (140) in which a first recess (143a), a second projection (143b), and a third recess (143c) are continuously formed in a side view, and a longitudinal feed rotation shaft that rotates. (151) A transplanter according to claim 1, characterized in that it comprises a longitudinal feeding drive arm (150) having a restraining roller (152) in part.

According to a third aspect of the present invention, as the longitudinal feed drive arm (150) rotates, the restraining roller (152) causes the curved edge (131a) of the feed rod arm (130) and the feed arm (140). ) In contact with the first recess (143a), the tray feeder (121) is configured to come out from between the pot portions (21), and the tray feeder (121) is configured to come out of the pot portion (21). Since the check roller (152) continues to come into contact with the curved edge (131a) of the feed rod arm (130) after coming out from between the tray feeder (121), the tray feeder (121) (21) While maintaining the state of being pulled out from between each other, the restraining roller (152) comes into contact with the second convex portion (143b) of the feed arm (140), and the pot portion is horizontally aligned. After the tray feeder (121) has moved upward by one horizontal row of the pot portion, the check roller (152) is moved to the curved edge portion of the feed rod arm (130). (131a) and in a non-contact state, the tray feeder (121) is configured to move between the pot portions (21), and the tray feeder (121) is configured to move to the pot portion (21). ), The check roller (152) comes into contact with the third recess (143c) of the feed arm (140), and the tray feeder (121) is moved to the pot portion. (21) The transplanter according to claim 2, wherein the transplanter is configured to move downward in a state in which the tray is inserted between the trays and to feed the tray (20) by one horizontal row of the pot portion. is there.

The first related invention includes a tray supply device (100) for supplying a tray (20) containing a transplant (22), a planting device (7) for planting the transplant in a field, and the tray supply. An extraction device (200) for taking out the implant from the tray (20) of the device (100) and supplying it to the planting device (7), the extraction device (200) being an extraction tool (250, 260) When the guided members (245, 247) provided at the two locations move while being guided by the common guide portion (240), the extraction tool (250, 260) is removed from the tray (20). (22) The transplanting machine (1) which is in a supply state in which the posture is changed from the taken-out state to be taken out and supplied to the transplanting device (7), and is driven to rotate by a driving force from the main body of the transplanting machine Arm (220) and said drive A connecting arm (230) having one end rotatably connected to the tip of the arm is connected, and one end of one guided member (245) and the other end of the connecting arm (230) are connected to each other. The extraction tool (250, 260) has a pair of extraction claws (261L, 261R) for taking out the implant, and the pair of extraction claws fixed to the other end of the one guided member (245). (261L, 261R) that opens and closes the cam (270), and a driving force is transmitted from the driving arm (220) to the cam (270) through the one guided member (245), and the driving arm (220) ) And a transmission mechanism (290, 291, 292, 293) for rotating the cam (270) in accordance with the drive cycle of the above-mentioned, and the extraction device (200) is an extrusion mechanism for extruding the implant (22) ( 80), and the extrusion mechanism (280) has an extrusion rod (281) formed with a notch (281b), and when the extrusion rod (281) is pushed out, the notch (281b) The distal ends of the pair of extraction claws (261L, 261R) pass through, the extrusion rod (281) has a flat upper portion, and the pair of extraction claws (261L, 261R) The transmission mechanism (290) includes a first gear (291), a second gear (292), and a third gear (293), and a cam shaft (271) of the cam (270). ), The first gear (291) is fixed to the drive arm (220), and the third gear (293) is integrated with the cam shaft (271). One said guided member (2 45), and the second gear (292) is configured to fit both the first gear (291) and the third gear (293), and the notch (281b) The pair of extraction claws (261L, 261R) is configured to move while pushing and expanding the distal ends, and the push rod (281) is configured to move the distal ends (261Lp, 261Rp) of the pair of extraction claws (261L, 261R). The extruding rod (281) is retracted in accordance with the insertion speed of the distal ends (261Lp, 261Rp) of the pair of extraction claws (261L, 261R). It is .
In the second related invention, the common guide portion (240) includes a guide groove (241), and the guide groove (241) includes a straight portion and a bent portion bent following the straight portion. In the extracted state, the two guided members (245, 247) are both guided by the linear portion, and the extraction tool (250, 260) holding the implant is the tray (20). Then, one of the guided members (245) moves to the bent portion and is guided to change the posture of the extraction tool (250, 260) toward the supply state. And a transplanter according to the first related invention.

In the third related invention, the cam (270) has a configuration in which the thickness of the outer peripheral portion differs depending on the location, and the pair of extraction claws (261L, 261R) is opened and closed by the change in the thickness. An extruding mechanism (280) for extruding the implant held by the pair of extraction claws (261L, 261R) according to a change in the outer diameter, the outer diameter of the cam (270) being different depending on the location. The transplanter according to the first or second related invention, wherein the transplanter is operated .
According to a fourth related invention, the cam (270) is located between the pair of extraction claws (261L, 261R), and the cam (270) has a non-uniform thickness. The pair of extraction claws (261L, 261R) are opened and closed, and the push-out mechanism (280) pushes the implant toward the planting device (7) by changing the outer shape of the cam (270). The transplanter according to any one of the first to third related inventions.

(Delete)

According to the first to third aspects of the present invention, the tray vertical feeding device (120) can be made compact .
Further, the tray transport path moving device (170) can be supported so as to be movable left and right with a simple structure .
Further, according to the first aspect of the present invention, by supporting the tray conveyance path (111) by the lead cam shaft (171) and the guide rail (155), the guide rail (155) is separated from the lead cam shaft (171) by the tray. Since the structure supports the conveyance path (111), rattling during movement in the left-right direction is suppressed.

And by the 1st related invention, the support structure of an extraction tool (250, 260) becomes simple and an extraction accuracy improves.
In addition, the position and posture of the extraction tool (250, 260) can be appropriately and smoothly controlled with a simple structure.
Further, the cam (270) can be disposed in the vicinity of the extraction claws (261L, 261R), and the opening / closing mechanism of the extraction claws (261L, 261R) can be simplified.
When the push rod (281) is pushed out, the ends of the pair of extraction claws (261L, 261R) pass through the notch (281b) and the notch (281b) is paired with the pair of extraction claws (261L, 261R). ), While moving the front end portion of the tip, the soil or the like adhering to the front end portion is removed.
In addition, the push rod (281) has a flat upper portion and covers the upper ends of the pair of extraction claws (261L, 261R) (261Lp, 261Rp), so that the implant on the tray (20). Can be prevented from being caught by the leading end portions (261Lp, 261Rp) of the extraction claws (261L, 261R).
Further, since the push rod (281) is retracted in accordance with the insertion speed of the distal ends (261Lp, 261Rp) of the pair of extraction claws (261L, 261R), the implant is entangled with the distal ends (261Lp, 261Rp). It can be prevented.

Further, according to the second related invention, in addition to the effects of the first related invention, the position of the extraction tool (250, 260) from the time when the implant is taken out in the extraction state to the time when the implant is supplied in the supply state, and The posture can be appropriately and smoothly controlled only by the common guide portion (241) .

Further, according to the third related invention, in addition to the effects of the first or second related invention, the opening and closing of the extraction claws (261L, 261R) by one cam (270) and the implant by the pushing mechanism (280). (22) can be extruded and the structure can be simplified .

Further, according to the fourth related invention, in addition to the effects of any one of the first to third related inventions, the position and posture of the extraction tool (250, 260) can be controlled appropriately and smoothly with a simple structure. I can do it .
Further, the cam (270) can be disposed in the vicinity of the extraction claws (261L, 261R), and the opening / closing mechanism of the extraction claws (261L, 261R) can be simplified.

(Delete)

Left side view of a seedling transplanter according to an embodiment of the present invention The top view of the seedling transplanting machine of embodiment of this invention The perspective view of the tray supply apparatus of embodiment of this invention The schematic side view which shows the structure of the tray vertical feeding apparatus of embodiment of this invention Schematic perspective view of the take-out device of the embodiment of the present invention Schematic side view of the take-out device as seen from the upper left back side of the paper of FIG. The schematic diagram which shows the rough correspondence of the position on the locus | trajectory of the front-end | tip part of a pair of extraction nail | claw, and the position of rotation of a seedling drive arm in the extraction apparatus of embodiment of this invention The schematic side view which shows the structure of the 1st intermittent gear and the 2nd intermittent gear as a modification of the taking-out apparatus of embodiment of this invention

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

(Embodiment)
FIG. 1 shows a side view of a seedling transplanter according to an embodiment of the present invention, and FIG. 2 shows a plan view.

  FIGS. 1 and 2 show a seedling transplanting machine 1 for transplanting seedlings such as vegetables. An engine E as a driving source is mounted on the front of the vehicle body, and traveling wheels 2, 3 are mounted on the front and rear of the vehicle body. And the rotational power of the engine E is transmitted to the rear wheel 3 via the mission device in the mission case 4.

  The seedling transplanter 1 according to this embodiment includes a tray supply device 100 that supplies a tray 20 that stores seedlings 22 (see FIG. 3), a planting device 7 that plants the seedlings 22 in a field, and a tray of the tray supply device 100. While taking out seedlings 22 from 20 and supplying them to the planting device 7, etc., the take-out device 200 and the like are provided, and the aircraft is advanced with the pair of left and right front wheels 2 and 2 and the pair of left and right rear wheels 3 and 3 straddling the heel U. The seedlings 22 accommodated in the tray 20 are automatically planted on the upper surface of the ridge U. The operator is configured to steer the aircraft with the steering handle 8 while walking behind the aircraft.

  The traveling unit is provided with a machine body control mechanism that moves the pair of left and right rear wheels 3 and 3 up and down relative to the machine body to control the machine body position.

  Between the traveling transmission case 9 of the pair of left and right rear wheels 3 and 3 and the traveling vehicle body, an elevating cylinder 10 that elevates and lowers the airframe by raising and lowering the wheels is provided. The pair of rear wheels 3 and 3 move up and down in the same direction by the same amount, and the body moves up and down.

  FIG. 3 is a perspective view of the tray supply device 100, and FIG. 4 is a schematic side view showing the configuration of the tray vertical feeding device 120 of the tray supply device 100.

  The tray 20 is formed by connecting a plurality of seedling pots 21 vertically and horizontally, is formed of plastic, and is configured to retain flexibility. Each seedling pot 21 is connected on the front surface side, and the back surface is in an independent form.

  The tray supply device 100 includes a seedling table 110 having a tray conveyance path 111 inclined downward to support the bottom of the tray 20, and a tray vertical feeding apparatus that intermittently feeds the tray 20 in the vertical direction along the tray conveyance path 111. 120 and a tray transport path moving device 170 (see FIG. 2) for moving the seedling table 110 having the tray transport path 111 in the left-right direction.

  Also, the tray vertical feeding device 120 enters between the seedling pots 21 protruding from the back side of the tray 20 to the back side, and moves downward to feed the tray 20 by one horizontal row of the seedling pot 21. The tray feed rod 121 is configured to move out from between the seedling pots 21 and move upward by the horizontal row of the seedling pots 21.

  The tray feed rod 121 is configured such that a central portion 121a can enter and exit from a retreat groove 111a provided at a lower portion of the tray conveyance path 111, and both end portions 121b are bent at a right angle so as to be outside of both sides of the tray conveyance path 111. The configuration is such that the tray 20 does not get in the way when the tray 20 moves on the tray conveyance path 111.

  Further, the tray transport path moving device 170 is provided on the back side of the tray transport path 111 and obtains a driving force from the main body side of the seedling transplanter 1 to move the seedling table 110 having the tray transport path 111 in the left-right direction. A lead cam shaft 171 and a guide rail 155 provided above the lead cam shaft 171 and guiding movement in the left-right direction of the seedling table 110 having the tray transport path 111 are provided.

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

  When the tray 20 is inserted from above the seedling mount 23 so as to be sandwiched between the tray conveyance path 111 and the presser frame 25, the tip of the feed rod 121 is engaged with the groove on the back side of the tray 20, In this state, the feed rod 121 rotates while drawing a substantially square locus A in a side view, whereby the tray 20 is intermittently vertically fed along the tray conveyance path 111 in an obliquely downward direction.

  A mechanism for intermittently feeding the tray 20 vertically using the feed rod 121 will be described later.

  On the other hand, the take-out device 200 is disposed at a position facing the lower end portion of the seedling placing table 23, and the tip of the take-out claw 210 operates so as to draw a trajectory K. The seedlings 22 are sequentially taken out and supplied to the planting device 7.

  Next, the configuration of the extraction device 200 provided in the seedling transplanting apparatus 1 of the present embodiment will be mainly described with reference to FIGS. 5 and 6.

  FIG. 5 is a schematic perspective view of the take-out device 200, and FIG. 6 is a schematic side view of the take-out device 200 as seen from the upper left back side of the paper surface of FIG.

  As shown in FIGS. 5 and 6, the take-out device 200 is rotatably held by an take-out device fixing member 201 fixed to the main body of the seedling transplanter 1, and the main body side drive source is connected via a chain belt 202. A drive arm 220 that is rotated in the same direction by a drive shaft 203 that is rotated in the direction of arrow B by power, a connecting arm 230 in which one end portion 230a is rotatably connected to a distal end side portion 220a of the drive arm 220; A plate-like member that is held on the take-out device fixing member 201 by fixing pins 201a and 201b and has an outer shape of an approximately J letter, and the side closer to the tray supply device 100 is straight and the far side is substantially R-shaped. And a guide portion 240 having a guide groove 241 that has a shape rising up.

  Further, the take-out device 200 includes a first guided member 245 that is integrated with a cam shaft 271 to be described later and inserted into the guide groove 241 so as to be smoothly slidable without shaking. The substrate 250 is connected to the member 247, protrudes from one end of the side surface to which the guided members are connected, and is bent at a substantially right angle, and the substrate 250 protrudes perpendicularly from the bent portion 251 of the substrate 250. A pair of left and right extraction claw holding pins 252L and 252R, which are movably held, and a root portion are attached to a pair of left and right extraction claw holding pins 252L and 252R, respectively, and the width of the tip portion is narrowed into a tweezers. 21 and a pair of extraction claws 261L, 261R for taking out the seedling 22 in the 21 and a base portion side of the inner surface portion of the pair of extraction claws 261L, 261R facing each other. A take-out member 260 and a spring 263 pulling the opposite ends is mounted, and a.

  In addition, an example of the structure including the board | substrate 250 and the extraction member 260 of this Embodiment corresponds to the extraction tool of this invention.

  Further, the take-out device 200 is a cam 270 having a cam shaft 271 integrated with the first guided member 254, which is pivotably penetrated through the substrate 250, and is related to the thickness of the outer peripheral portion of the cam 270. The outer peripheral portion 272 whose thickness varies depending on the location of the outer peripheral portion when contacting the front end surfaces of the pair of left and right claw tip width regulating projections 262L, 262R provided on the inner surface portions of the pair of extraction claws 261L, 261R. And an outermost edge portion 273 whose outer diameter changes depending on the position of the outermost edge portion with respect to a distance (also referred to as an outer diameter) of the outermost edge portion of the cam 270 from the axis center of the cam shaft 271. The cam 270 is pivotally connected to the substrate 250, and is removed from the seedling pot 21 along the pair of take-out claws 261L and 261R by a change in the outer diameter of the outermost edge 273 of the cam 270. Take-out pawl 261L, and a, a pushing mechanism 280 for pushing the seedlings 22 held by 261R.

  Further, the edge portion 245 a near the tip of the first guided member 245 that is integral with the cam shaft 271 is rotatably connected to the other end 230 b of the connecting arm 230. The first guided member 245 that is integral with the camshaft 271 passes through a transmission mechanism 290 including a first gear 291, a second gear 292, and a third gear 293 by the rotational force of the drive arm 220. The driving force is transmitted to the cam shaft 271 in accordance with the driving cycle of the driving arm 220 by being rotated.

  Further, when the outer peripheral portion 272 of the cam 270 comes into contact with the front end surfaces of the pair of left and right claw tip width regulating protrusions 262L and 262R provided on the inner surface side of the pair of extraction claws 261L and 261R, the outer peripheral portion 272 of the cam 270 The pair of extraction claws 261L and 261R is opened and closed by the interaction between the change in thickness and the restoring force of the tension spring 263.

  Next, the transmission mechanism 290 will be further described.

  That is, the first gear 291 is fixed to the distal end side portion 220a of the drive arm 220, and is rotatably attached to the connection arm 230 via the first rotation shaft 291a. Further, the third gear 293 is fixed to the tip end portion 245 b of the first guided member 245 that is integral with the cam shaft 271, and the edge portion 245 a near the tip end of the first guided member 245 is connected to the connecting arm 230. Therefore, the third gear 293 is rotatably held with respect to the connecting arm 230. Therefore, the third gear 293 rotates integrally with the first guided member 245. The second gear 292 is rotatably attached at the center position of the interlocking arm 220, and is sandwiched between both the first gear 291 and the third gear 293 and is fitted to both gears.

  Next, the extrusion mechanism 280 will be further described mainly with reference to FIG.

  The extruding mechanism 280 pushes out the seedling 22 held by the pair of extraction claws 261L, 261R. The tip portion 281a is bent at a right angle to form a notch 281b that matches the width of the tip portion of the extraction claws 261L, 261R. An extrusion rod 281 and a connecting rod 282 bent at a substantially right angle, one end portion 282a of which is rotatably inserted into a rear end hole portion 281c provided at the rear end portion of the extrusion rod 281. The connecting rod 282 held by a pull-out preventing pin (not shown), the other tip 282b of the connecting rod 282 are fixed to the upper end 283a, and the lower end 283b is fixed to the substrate 250 by the push arm connecting shaft 283d. A push-out arm 283 that is pivotally attached and provided with a tension spring holding first projection 283c in the center, and one end of the tension spring holding first projection. Hooked to 83c, the other end is provided with a spring 284 pulling the push-out arm hooked to the second projection 250a for the tension spring held fixed to the substrate 250.

  Then, when the cam 270 rotates in the direction of arrow B, the protruding portion 273b having an outer diameter larger than that of the other portion 273a in the outermost edge portion 273 is the outer peripheral edge portion of the root portion of the first projection 283c for holding the tension spring. , The push-out arm tension spring 284 is extended, and the push-out arm 283 is swung counterclockwise in FIG. 6 so that the push-out rod 281 connected by the connecting rod 282 moves backward. Yes (see arrow C). Further, when the cam 270 rotates in the direction of arrow B, the other portion 273a having an outer diameter smaller than the protruding portion 273b in the outermost edge portion 273 is the outer peripheral edge portion of the root portion of the first projection 283c for holding the tension spring. , The push-out arm tension spring 284 is contracted, and the push-out arm 283 is rotated clockwise in FIG. 6 so that the push-out rod 281 connected by the connecting rod 282 protrudes (arrow). D). Each time the push rod 281 protrudes, the tip of the pair of extraction claws 261L and 261R passes through the notch 281b provided in the tip 281a of the push rod 281. It is a configuration that removes the soil that had been removed.

  Here, although the extrusion rod 281 has a flat upper portion, it can prevent the leaves of the seedling 22 from being entangled with the pair of extraction claws 261L and 261R.

  Next, the operation of the take-out device 200 will be described with reference to FIGS.

  As described above, the guide portion 240 does not move because it is firmly fixed to the extraction device fixing member 201 fixed to the main body of the seedling transplanter 1.

  As the drive arm 220 rotates, the connecting arm 230 swings. The movement of the connecting arm 230 passes through the guide groove 241 formed in the guide portion 240 and is connected to the substrate 250. Regulated by H.245.

  On the other hand, the substrate 250 also swings along with the movement of the connecting arm 230. In addition to the first guided member 245, the second guided member 247 penetrates the guide groove 241 in the substrate 250. Since the second guided member 247 is not connected to the connecting arm 230, the movement repeats reciprocating movement along the guide groove 241. Since the extraction member 260 is attached to the substrate 250, the extraction member 260 also moves in the same manner as the substrate 250, and the distal ends 261Lp and 261Rp of the pair of extraction claws 261L and 261R have the locus shown in FIGS. Draw K.

  Here, FIG. 7 is a schematic diagram showing a general correspondence relationship between the rotation position of the drive arm 220 and the position on the locus K of the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R. The rotation positions P1 to P6 of the drive arm 220 shown in FIG. 7 correspond to the positions K1 to K6 on the locus K of the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R. In addition, the arrow described on the broken line which shows the locus | trajectory K has shown the operation | movement direction.

  As shown in FIG. 7, the operation of the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R from the position K1 to the position K2 corresponds to the operation of extracting the seedling 22 from the seedling pot 21. Since the locus K from the position K1 to the position K2 is linear, the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R recede straight from the seedling pot 21. At this time, the force in the direction approaching each other acts on the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R by the restoring force of the tension spring 263, and the seedlings 22 extracted from the seedling pot 21 are held. I can do it. The opening / closing operation of the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R will be described later together with the operation of the push rod 281.

  The movement of the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R from the position K6 toward the position K1 is performed with respect to the seedlings 22 in the breeding pot 21 of the tray 20 at the seedling extraction position. 261L, 261R is inserted, and moves in the opposite direction along the path K from the position K1 to the position K2, so that the tips 261Lp, 261Rp of the pair of extraction claws 261L, 261R It is inserted almost straight into the pot 21. At this time, the force in the direction away from each other acts against the restoring force of the tension spring 263 on the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R, and both the tip portions are open. You can enter the seedling pot 21.

  Thus, the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R do not damage the tray 20, the seedling pot 21, and the seedling itself.

  The trajectory K from the position K1 to the position K2 and the trajectory K from the position K6 to the position K1 are substantially linear. The side near the tray supply device 100 of the guide groove 241 is linear. It is because it is done.

  Next, as moving from the position K2 to the position K3, the tip portions 261Lp and 261Rp of the pair of take-out claws 261L and 261R change their postures from the posture facing the seedling pot 21 until then substantially downward. When moved to the position K4, the tip portions 261Lp and 261Rp are substantially directed downward.

  The reason why the posture is suddenly changed substantially downward as described above is that the side of the guide groove 241 far from the tray supply device 100 is formed in a shape that rises in a substantially R shape.

  At that time, just below the tip portions 261Lp and 261Rp, the seedling insertion port (not shown) of the planting device 7 in the ascending process on the locus T1 (see FIG. 1) is directed upward toward the top dead center. The seedling 22 pushed out from the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R by the push rod 281 falls to the seedling inlet of the planting device 7 between the position K4 and the position K5. Supplied to the seedling planting tool 11. The operation of the push rod 281 will be further described later.

  Next, from the position K5 toward the position K6, the tip portions 261Lp and 261Rp of the pair of take-out claws 261L and 261R abruptly move so that the posture that has been directed substantially downward until then can be opposed to the next seedling pot 21. The tip portions 261Lp and 261Rp are inserted into the new seedling pot 21 when the position is changed to move to the position K1.

  As can be seen from the approximate correspondence between the rotation position of the drive arm 220 and the positions of the tip ends 261Lp and 261Rp of the pair of extraction claws 261L and 261R on the locus K shown in FIG. Since the movement toward is performed more slowly than the movement from the position K1 to the position K2 described above, the removal of the seedling 22 from the seedling pot 21 can be performed quickly and the release of the seedling 22 to the planting device 7 is ensured. Can be done.

  Such an operation is performed because the connecting arm 230 is provided in front of the drive arm 220 (the extraction position of the tray supply device 100). Further, since the drive arm 220 is farther from the extraction position of the tray supply device 100 than the connection arm 230, it does not come into contact with the seedling 22 when the seedling 22 is taken out.

  Next, operations of the transmission mechanism 290 and the extrusion mechanism 280 will be mainly described with reference to FIGS. 5, 6, and 7.

  As shown in FIG. 5, the first gear 291 fixed to the distal end side portion 220 a of the drive arm 220 by the rotation of the drive arm 220 in the B direction moves in the B direction around the rotation fulcrum 220 b of the drive arm 220. Revolve. The first gear 291 is rotatably attached to the connecting arm 230 via the first rotation shaft 291a, and rotates the third gear 293 in the B direction via the second gear 292. The third gear 293 is fixed to the leading end 245 b of the first guided member 245 that is integral with the cam shaft 271, and the leading edge vicinity 245 a of the guided member 245 is connected to the other end of the connecting arm 230. Since the third gear 293 is rotated, the cam 270 is rotated in the B direction via the cam shaft 271 because the third gear 293 is rotated. That is, the cam 270 rotates in accordance with the drive cycle of the drive arm 220.

  The cam 270 has an outer peripheral portion 272 whose thickness varies depending on the location, and an outermost edge portion 273 whose distance (outer diameter) from the shaft center of the cam shaft 271 varies depending on the location. As shown, the protruding portion 273b in the outermost edge portion 273 has a larger outer diameter than the other portion 273a, and the thickness of the first range 272a is within the outer peripheral portion 272 at the same distance from the axial center of the cam shaft 271. The thickness is set smaller than the thickness of the second range 272b which is the remaining thick portion.

  With the above configuration, when the cam 270 rotates in synchronization with the drive cycle of the drive arm 220, the distal ends 261Lp and 261Rp of the pair of extraction claws 261L and 261R move from the position K6 to the position K1. The opening / closing operation of the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R and the operation of the push rod 281 are as follows.

  That is, the second range 272b, which is a thick portion of the outer peripheral portion 272 of the cam 270, comes into contact with the tip surfaces of the pair of left and right claw tip width restricting projections 262L and 262R, whereby a pair of extraction claws 261L and 261R The front end portions 261Lp and 261Rp are opposed to the restoring force of the tension spring 263, and force in directions away from each other is acting, and both the front end portions are open.

  On the other hand, at this time, the protrusion 273b of the outermost edge 273 of the cam 270 is in contact with the outer peripheral edge of the base portion of the first projection 283c for holding the tension spring, so that the push arm tension spring 284 is pulled. The pushing arm 283 is rotated counterclockwise in FIG. 6 (see arrow C), and the pushing rod 281 connected by the connecting rod 282 is maintained in the retracted state.

  Therefore, the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R can enter the seedling raising pot 21 and take out the seedling.

  Next, the opening / closing operation of the pair of extraction claws 261L, 261R, 261Lp, 261Rp when the tip portions 261Lp, 261Rp of the pair of extraction claws 261L, 261R perform the operation from the position K1 toward the position K2, and the extrusion The operation of the rod 281 is as follows.

  That is, at the same time when the operation from the position K1 toward the position K2 is started, the first range 272a, which is a thin portion of the outer peripheral portion 272 of the cam 270, is connected to the tip surfaces of the pair of left and right claw tip width regulating projections 262L and 262R. By making contact, the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R move toward each other due to the restoring force of the tension spring 263, so that both tip portions are closed.

  On the other hand, at this time, the protrusion 273b of the outermost edge 273 of the cam 270 is still in contact with the outer peripheral edge of the base portion of the first projection 283c for holding the tension spring, so that the push-out arm tension spring 284 is The pusher arm 283 is stretched and maintained in a state of rotating counterclockwise in FIG. 6 (see arrow C), and the pusher rod 281 connected by the connecting rod 282 is maintained in the retracted state. Yes. Therefore, the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R can hold the extracted seedling 22 firmly at the tip portion and move to the planting device 7 side as it is.

  Next, the opening / closing operation of the pair of extraction claws 261L, 261R, 261Lp, 261Rp when the tip portions 261Lp, 261Rp of the pair of extraction claws 261L, 261R perform the operation from the position K4 toward the position K5, and extrusion The operation of the rod 281 is as follows.

  That is, at the same time when the operation from the position K4 toward the position K5 is started, the other portion 273a of the outermost edge portion 273 of the cam 270 is replaced with the outer peripheral edge of the root portion of the first protrusion 283c for holding the tension spring. 6, the pushing arm 283 instantaneously turns clockwise in FIG. 6 by the restoring force of the pushing arm tension spring 284 (see arrow D), and the pushing arm connected by the connecting rod 282. At the same time as the rod 281 is pushed out, the cutout part 281b of the tip part 281a of the push rod 281 moves while expanding the tip parts of the pair of extraction claws 261L, 261R.

  As a result, the seedling 22 pushed out from the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R by the tip portion 281a of the extrusion rod 281 falls to the seedling insertion port of the planting device 7 to the seedling planting tool 11. Supplied. At this time, the cutout portion 281b of the distal end portion 281a of the push rod 281 moves while pushing and expanding the distal end portions of the pair of extraction claws 261L and 261R, so that the dirt or the like attached to the distal end portion is simultaneously removed. It is.

  Next, the opening / closing operation of the pair of extraction claws 261L, 261R, 261Lp, 261Rp when the tip portions 261Lp, 261Rp of the pair of extraction claws 261L, 261R perform the operation from the position K5 to the position K6, and extrusion The operation of the rod 281 is as follows.

  That is, in the outer peripheral portion 272 of the cam 270, the second range 272b which is a thick portion instead of the first range 272a which is a thin portion is in contact with the tip surfaces of the pair of left and right claw tip width regulating projections 262L and 262R. By doing so, the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R change to a state in which both tip portions are opened due to the force in the direction away from each other against the restoring force of the tension spring 263. To do.

  On the other hand, when coming to the vicinity of the position K6, the projecting portion 273b of the outermost edge portion 273 of the cam 270 contacts the outer peripheral edge portion of the base portion of the first projection 283c for holding the spring spring instead of the other portion 273a. Thus, the push arm tension spring 284 is extended, the push arm 283 is swung counterclockwise in FIG. 6 (see arrow C), and the push rod 281 connected by the connecting rod 282 is retracted. Change to state.

  In the above-described embodiment, the case where the pair of extraction claws 261L and 261R are integrally formed of the same metal plate member from the root portion to the distal end portion has been described. About the front end side, it may be made of, for example, a rubber plate or a resin plate that can be detached and has elasticity. Thereby, even if the tip part grasps the seedling 22 by the restoring force of the tension spring 263, the rubber plate is deformed by the elasticity of the tip side, so that the seedling 22 is not crushed.

  Further, the push rod 281 covers the upper ends of the pair of extraction claws 261L and 261R until the distal ends 261Lp and 261Rp of the pair of extraction claws 261L and 261R move in the vicinity of the position K6. Although configured, this can prevent the leaves of the seedling 22 on the tray 20 from being caught by the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R when moving from the position K5 to the position K6.

  In addition, the push rod 281 is configured to be retracted in accordance with the insertion speed when the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R are inserted into the seedling pot 21, thereby the leaves of the seedling 22 Can be prevented from being entangled with the end portions 261Lp and 261Rp.

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

  As shown in FIG. 4, the tray vertical feeding device 120 has the above-described tray feeding rod 121 and a protrusion having a curved edge portion 131a in which one end 121b1 of both end portions 121b of the tray feeding rod 121 is fixed and one side is curved inward. A feed rod arm 130 having a cam 131 formed at the bottom and a root portion 141 are rotatably supported by the side plate 110a of the seedling table 110, and the feed rod arm 130 is rotatably supported by the tip portion 142. The feed arm 140 in which the first concave portion 143a, the second convex portion 143b, and the third concave portion 143c are formed smoothly and continuously in a side view at the lower end edge, and the driving force obtained from the power source of the seedling transplanter 1 is an arrow. When viewed from the side of the take-out device 200, the longitudinal feed pivot shaft 151 that pivots in the E direction is fixed at two positions, the center position and the right end position of the longitudinal feed pivot shaft 151, respectively. It includes a longitudinal feeding drive arm 150 having a control roller 152 to rotatably a.

  Further, a feed arm tension spring 160 is attached between the front end portion 142 of the feed arm 140 and the lower portion 110a1 of the side plate 110a of the seedling table 110 so that a downward pulling force is always applied to the feed arm 140. ing. Further, a spring mounting rod 163 that holds the other end of the feed rod arm tension spring 161 having one end attached to the pin 132 attached to the upper end portion of the feed rod arm 130 is fixed to the root portion 141 of the feed arm 140. Has been.

  Next, the intermittent operation of the tray feed rod 121 will be described with reference to FIGS.

  It is assumed that the seedling table 110 is moved in the right direction, that is, in the direction of arrow F (see FIG. 3) by the rotation of the lead cam shaft 171. At that time, the longitudinal feed rotation shaft 151 is rotated in the direction of arrow E (see FIG. 4).

  In the meantime, the take-out device 200 sequentially takes out the seedlings 22 from the seedling pot 21 at the right end and supplies the seedlings 22 to the planting device 7, and then the leftmost end when the seedling placement stand 110 moves to the rightmost end. The seedling 22 of the nursery pot 21 is taken out by the take-out device 200. Thereby, all the seedlings 22 for one horizontal row of the seedling pot 21 are taken out.

  At this time, it is rotatably attached to the front end portion of the vertical feed drive arm 150 which is rotated in the direction of arrow E together with the vertical feed rotary shaft 151 and which is fixed to the right end of the vertical feed rotary shaft 151. The check roller 152 starts to contact the curved edge 131a of the feed rod arm 130 and the first recess 143a of the feed arm 140 and continues to rotate as it is.

  As a result, the feed rod 121 rotates counterclockwise about the axis of the tip 142, and the feed arm 140 rotates clockwise about the axis of the root 141, so that the back side of the seedling pot 21 until then. As a result, the central portion 121a of the feed rod 121 that has been waiting in the gap 21a moves in the direction of the arrow 121a1 (see FIG. 4).

  Thereafter, when the check roller 152 continues to rotate, the check roller 152 continues to contact the curved edge portion 131a of the feed rod arm 130, so that the central portion 121a of the feed rod 121 is positioned in the retreat groove 111a. At this time, the check roller 152 moves from the first concave portion 143a of the feed arm 140 toward the second convex portion 143b, so that the feed arm 140 further rotates clockwise and feeds. As a result, the central portion 121a of the rod 121 moves in the direction of the arrow 121a2 (see FIG. 4) while maintaining the state of being located in the retracting groove 111a.

  Thereafter, when the check roller 152 continues to rotate, the check roller 152 is not in contact with the curved edge portion 131a of the feed rod arm 130, and at the same time, the feed rod arm 130 is moved by the restoring force of the feed rod arm tension spring 161. By instantaneously rotating clockwise around the axis of the tip end portion 142, the central portion 121a of the feed rod 121 is moved from the gap 21a toward the gap 21b located on the upper side by one row of the seedling pot 21 in the direction of the arrow 121a3. Move as shown.

  Thereafter, when the check roller 152 continues to rotate, the check roller 152 moves while being in contact with the third recess 143 c of the feed arm 140, so that the feed arm 140 is moved downward by the restoring force of the feed arm tension spring 160. As a result, the central portion 121a of the feed rod 121 moves in the direction of the arrow 121a4 (see FIG. 4) while maintaining the state of being positioned in the gap 21b.

  And the center part 121a of the feed rod 121 which moved to the direction of the arrow 121a4 (refer FIG. 4) is maintaining the state located in the clearance gap between the seedling pots of the back side of the seedling pot 21, and the seedling stand 110 is the arrow. When the movement in the G direction, that is, the left direction is started, the take-out device 200 sequentially takes out the seedlings 22 from the seedling pot 21 at the left end and supplies the seedlings 22 to the planting device 7. At the time of movement, the seedling 22 in the rightmost seedling pot 21 is taken out by the take-out device 200. Thereby, all the seedlings 22 for one horizontal row of the seedling pot 21 are taken out.

  At this time, unlike the above, the check roller 152 rotatably attached to the distal end portion of the longitudinal feed drive arm 150 fixed at the center position of the longitudinal feed pivot shaft 151 is provided with the feed rod arm 130. The curved edge 131a and the first recess 143a of the feed arm 140 are brought into contact with each other.

  By repeating the above-described operation, the tray 20 is moved rightward or leftward, and is intermittently vertically fed by one row of the seedling pot 21.

  Thereby, the tray vertical feeding device 120 having a compact structure is obtained. Further, the tray conveyance path 111 can be supported so as to be movable left and right with a simple structure of the guide rail 155 and the lead cam shaft 171.

  In the above-described embodiment, the configuration in which the lead cam shaft 171 is continuously driven has been described.

  In other words, the first intermittent gear 300 shown in FIG. 8 is fixed to one end side of the continuously rotating vertical feed rotating shaft 151 shown in FIG. 4, and the second intermittent gear meshes intermittently with the first intermittent gear 300. A configuration may be adopted in which a gear 310 is provided and a driving force is transmitted to the lead cam shaft 171 using a power transmission member such as a chain belt (not shown) via the rotation shaft of the second intermittent gear 310. In this configuration, the first intermittent gear 300 is alternately provided with first regions 301 in which gear teeth are formed and second regions 302 in which gear teeth are not formed. The second intermittent gear 310 includes a third region 311 in which the number of teeth equal to the number of teeth in the first region 301 of the first intermittent gear 300 is formed, and a fourth region in which no gear teeth are formed. 312 is provided. FIG. 8 is a schematic side view showing the configuration of the first intermittent gear 300 and the second intermittent gear 310 as a modification of the above embodiment.

  With this configuration, when the first intermittent gear 300 is continuously rotated, while the teeth of the first region 301 are engaged with the teeth of the third region 311 of the second intermittent gear 310, the second intermittent gear 310 is Rotate. However, next, the second region 302 of the first intermittent gear 300 and the fourth region 312 of the second intermittent gear 310 face each other, and the first intermittent gear 300 continues to rotate as it is, but the teeth meshing with each other. Therefore, the second intermittent gear 310 temporarily stops rotating. Then, the teeth of the first region 301 of the first intermittent gear 300 again mesh with the teeth of the third region 311 of the second intermittent gear 310, and the rotation is resumed. As a result, the lead cam shaft 171 can be driven intermittently, so that the tray 20 can be moved in the left-right direction intermittently, and the tray 20, the seedling pot 21, and the seedling itself can be more reliably damaged. The seedling 22 can be taken out more accurately.

  In the above embodiment, the positional relationship between the connecting arm 230 and the driving arm 220 has been described with respect to the configuration in which the connecting arm 230 is provided in front of the driving arm 220 (the extraction position of the tray supply device 100). For example, the drive arm may be provided on the front side (the extraction position of the tray supply device 100) side of the connection arm. According to this configuration, since the operation of the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R at the extraction position of the seedling 22 is slower than the configuration described in the above embodiment, Although it can take out, the moving speed at the time of discharge | releasing the seedling 22 to the planting apparatus 7 becomes faster than the said structure.

  In the above-described embodiment, the rotation fulcrum 220b (see FIG. 6) of the drive arm 220 has been described as being substantially in the same position as the linear portion of the guide groove 241 when viewed from the side of the machine body. For example, the rotation fulcrum 220b may be disposed below the linear portion of the guide groove 241. In this case, at the extraction position of the seedling 22, the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R can increase the insertion speed when being inserted into the seedling pot 21, and can reduce the extraction speed. The seedling 22 can be extracted more reliably.

  Further, as the transplanter of the present invention, in the above-described embodiment, the tray supply apparatus 100 including the extraction apparatus 200 that is an example of the extraction apparatus of the present invention and the tray feed rod 121 that is an example of the tray supply apparatus of the present invention. However, the present invention is not limited thereto. For example, as another example of the transplanter of the present invention, an extractor 200 which is an example of the extractor of the present invention, a conventional tray supply device, It may be a seedling transplanter equipped with.

  The seedling transplanting machine according to the present invention has an effect of improving the accuracy of taking out the transplant of the extracting device, and is useful as a seedling transplanting machine for taking out seedlings from a pot portion of a tray and planting them in a field.

2 front wheel 3 rear wheel 4 mission case 5 tray supply device 6 take-out device 7 planting device 8 steering handle 9 travel transmission case 10 lifting cylinder 11 planting tool 20 tray 21 seedling pot 22 seedling 25 presser frame 100 tray supply device 110 seedling Table 111 Tray conveying path 155 Guide rail 200 Unloading device 201 Unloading device fixing member 201a Fixing pin 202 Chain belt 203 Drive shaft 220 Drive arm 230 Connection arm 240 Guide portion 241 Guide groove 250 Substrate 260 Unloading member 270 Cam 280 Extrusion mechanism

Claims (5)

A tray supply device (100) for supplying a tray (20) containing an implant (22);
A planting device (7) for planting the implant in a field;
An extraction device (200) for taking out the implant from the tray (20) of the tray supply device (100) and supplying it to the planting device (7),
The take-out device (200) moves while the guided members (245, 247) provided at two locations of the take-out tool (250, 260) move while being guided by a common guide portion (240). The transplanter (1) is in a supply state in which the tool (250, 260) changes its posture from the removal state in which the transplant (22) is taken out from the tray (20) and is supplied to the planting device (7). ,
A drive arm (220) that is rotated by a drive force from the body of the transplanter;
A connecting arm (230) having one end rotatably connected to the tip of the drive arm;
One end of one guided member (245) and the other end of the connecting arm (230) are connected,
The extraction tool (250, 260) has a pair of extraction claws (261L, 261R) for extracting the implant,
A cam (270) that opens and closes the pair of extraction claws (261L, 261R) fixed to the other end of the one guided member (245);
Driving force is transmitted from the driving arm (220) to the cam (270) via the one guided member (245), and the cam (270) is rotated in accordance with the driving cycle of the driving arm (220). A transmission mechanism (290, 291, 292, 293) to be moved,
The removal device (200) has an extrusion mechanism (280) for extruding the implant (22),
The extrusion mechanism (280) has an extrusion rod (281) formed with a notch (281b),
When the push rod (281) performs an extrusion operation, the distal ends of the pair of extraction claws (261L, 261R) pass through the notch (281b),
The extrusion rod (281) has a flat upper portion,
The pair of extraction claws (261L, 261R) is configured in a plate shape,
The transmission mechanism (290) includes a first gear (291), a second gear (292), and a third gear (293), and transmits the driving force to the cam shaft (271) of the cam (270). Yes,
The first gear (291) is fixed to the drive arm (220), and the third gear (293) is attached to the one guided member (245) that is integral with the cam shaft (271). The second gear (292) is fitted to both the first gear (291) and the third gear (293);
The notch portion (281b) is configured to move while expanding the distal end portions of the pair of extraction claws (261L, 261R),
The push rod (281) is configured to cover the top end portions (261Lp, 261Rp) of the pair of extraction claws (261L, 261R),
The extruding rod (281) is retracted in accordance with the insertion speed of the tip (261Lp, 261Rp) of the pair of extraction claws (261L, 261R). The common guide portion (240) includes a guide groove (241), and the guide groove (241) includes a straight portion and a bent portion that is bent following the straight portion.
In the removal state, the two guided members (245, 247) are both guided by the linear portion, and the removal tool (250, 260) holding the implant is separated from the tray (20), and thereafter The guide member (245) shifts to the bent portion and is guided to change the posture of the extractor (250, 260) toward the supply state. 2. The transplanter according to 1.   The cam (270) has a configuration in which the thickness of the outer peripheral portion varies depending on the location, and the change in the thickness opens and closes the pair of extraction claws (261L, 261R), and the outer diameter of the cam (270). The structure is different depending on the location, and the extrusion mechanism (280) for pushing out the implant held by the pair of extraction claws (261L, 261R) is operated by the change in the outer diameter. The transplanter according to 1 or 2.   The cam (270) is positioned between the pair of extraction claws (261L, 261R), and the cam (270) has a non-uniform thickness. Due to the change in the thickness, the pair of extraction claws (261L, 261R) is opened and closed, and the pushing mechanism (280) pushes the implant toward the planting device (7) by a change in the outer shape of the cam (270). The transplanter according to any one of the above. The tray supply device (100) includes a tray vertical feeding device (120) that intermittently feeds the tray (20) in the vertical direction along the tray conveyance path (111), and the tray conveyance path (111) in the horizontal direction. A tray transport path moving device (170) to be moved to
The tray vertical feeding device (120) enters between the pot portions (21) protruding to the back surface side from the back surface side of the tray (20) and moves downward to move the tray (20) Fixed to the tray feeder (121) and the tray feeder (121) configured to feed by one horizontal row of pot parts, get out of between the pot parts, and move upward by one horizontal row of pot parts A feed rod arm (130) formed with a protruding cam (131) having a curved edge portion (131a), and a first recess (on the edge portion) rotatably supporting the feed rod arm (130). 143a), the second convex portion (143b), and the third concave portion (143c) are fixed to the feed arm (140) formed continuously in a side view and the vertical feed rotary shaft (151) that rotates, Check roller (1 Has a longitudinal feeding drive arm (150) having a 2),
The tray transport path moving device (170) is provided on the back side of the tray transport path, and is provided above the lead cam shaft (171) for moving the tray transport path in the left-right direction and the lead cam shaft (171). A guide rail (155) for guiding the movement of the tray conveyance path (111),
The tray transport path (111) is supported by the lead cam shaft (171) and the guide rail (155),
By the rotation of the longitudinal feed drive arm (150), the check roller (152) causes the curved edge (131a) of the feed rod arm (130) and the first recess (of the feed arm (140)). 143a), the tray feeder (121) is configured to come out from between the pot portions (21),
After the tray feeder (121) is pulled out from between the pot portions (21), the check roller (152) continues to contact the curved edge (131a) of the feed rod arm (130). Therefore, while the tray feeder (121) is maintained in a state where it is pulled out from between the pot portions (21), the check roller (152) is moved to the second convex portion (143b) of the feed arm (140). ), And moves upward by one horizontal row of the pot portion,
After the tray feeder (121) has moved upward by one horizontal row of the pot portion, the check roller (152) is in non-contact with the curved edge portion (131a) of the feed rod arm (130), The tray feeder (121) is configured to move between the pot portions (21).
After the tray feeder (121) moves between the pot portions (21), the restraining roller (152) comes into contact with the third recess (143c) of the feeding arm (140). The tray feeder (121) is configured to move downward while being in the state between the pot portions (21) to feed the tray (20) by one horizontal row of the pot portions. The transplanter according to any one of claims 1 to 4.

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