JP6090414B2 - Transplanter - Google Patents

Description

  The present invention relates to a transplanter that transplants seedlings, seed pods and the like into a field.

  Conventionally, an operator manually supplies seed pods and seedlings prepared on a mounting table of a transplanting machine one by one to a plurality of supply cups that are rotated and conveyed in a loop according to the traveling of the transplanting machine. A transplanter for automatically planting in a field is known.

  Hereinafter, the configuration and operation of a conventional transplanter will be briefly described with reference to the drawings.

  FIG. 24 is a side view of a conventional vegetable seedling transplanter 151 disclosed in Patent Document 1. As shown in FIG.

  In the drawings of the present application, unless otherwise noted, the left side is the front of the transplanter.

  As shown in FIG. 24, the vegetable seedling transplanter 151 is a seedling in which supply cups 153 for supplying seedlings one by one by hand by a worker are arranged in a loop on the supply turntable 154 at predetermined intervals. The plant includes a plant supply unit 152 and a planting device 155 having a planting tool 160 for planting the plant stock in the field while temporarily holding the plant stock supplied from the plant seed supply unit 152.

  In this vegetable seedling transplanting machine 151, a worker who walks with the traveling of the machine body grabs the seedlings in the seedling storage unit 156 one by one and rotates in accordance with the traveling of the machine body 153 I will put it in each.

  At the bottom of each supply cup 153, one open / close lid that is movable in the vertical direction is provided, and each open / close lid is attached to the planting tool 160 as the supply cup 153 is rotated by the supply turntable 154. It is opened when the top dead center is reached, and the seedling in the supply cup 153 is supplied to the planting tool 160 below. The tip of the planting tool 160 enters the field to a predetermined depth when it comes to the lowermost end and opens like a bird cage, and the seedlings held inside fall into the field and are planted.

  FIG. 25 shows an enlarged side view of the main part of the planting device 155.

  The planting device 155 connects the front end side to a planting device 160 that receives a seedling from an opening formed in the upper portion and can be opened and closed left and right, and a planting transmission unit 161 that drives the planting device 160 to move up and down. The lifting / lowering arm 162 is connected to the holder 167 of the planting tool 160 while moving up and down in parallel to the lower side of the lifting / lowering arm 162, and the auxiliary link 163 is maintained.

  The front end 162a of the lifting arm 162 is connected to be movable back and forth via a swinging arm 164 having a lower end 164a pivotally supported on a support shaft so as to swing back and forth, and a connecting point of an intermediate portion of the lifting arm 162 A crank arm 165 that rotationally drives 162b is provided. Further, a sub crank arm 166 that rotates in parallel with the rotation of the crank arm 165 and supports the front end of the sub link 163 is provided.

  Further, an opening / closing lever 170 for opening / closing the planting tool 160 is pivotally supported on a fulcrum 162c with the lifting arm 162. The open / close lever 170 is provided with an open / close arm 172 that can be operated in parallel via a connecting rod 171, and is pivotally supported at a connecting point 162 b of the crank arm 165, and rotates in parallel with the rotating operation of the crank arm 165. A sub crank arm 166 that supports the front end of the link 163 is provided, and an open / close cam 173 is provided integrally with the sub crank arm 166, and the open / close arm 172 is acted on the open / close arm 172 via a roller 172a at a predetermined timing.

  In the planting device 155 having the above-described configuration, the planting tool 160 opens and closes left and right in conjunction with the lifting operation by the lifting arm 162 that is swung up and down by the rotation of the crank arm 165 to plant the seedling.

  FIG. 26 shows a link configuration diagram of the planting device 155.

  Regarding the opening / closing operation of the planting tool 160, the opening / closing lever 170 pivotally supported by the fulcrum 162c of the lifting / lowering arm 162 operates in parallel with the opening / closing arm 172 via the connecting rod 171 regardless of the lifting / lowering position of the lifting / lowering arm 162. The opening / closing arm 172 is controlled in operation by an opening / closing cam 173 integrated with a sub crank arm 166 that rotates in the same phase as the crank arm 165.

JP 2009-284858 A

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An object of this invention is to provide the transplanter which can operate the inclination of the left-right direction of an airframe easily by an operator's hand . It is another object of the present invention to provide a transplanter in which the raising / lowering drive of the planting tool is stable. It is another object of the present invention to provide a transplanter that allows an operator to easily operate a grounding stand.

The above-mentioned problem of the present invention is solved by the following means.
The invention according to claim 1 is provided with a planting tool (28) for planting an object to be transplanted by opening and closing a downward tip on the airframe, and a vertical movement mechanism (19) for moving the planting tool (28) up and down. , in transplantation equipped with a handle (16) to the rear end of the fuselage,
The lateral inclination valve for adjusting the inclination of the left and right directions on the body (46) is provided, the rolling adjustment lever (47) for operating the lateral inclination valve (46) provided on said handle (16), the body in the lateral direction A neutral return spring (125) for returning the rolling adjustment lever (47) is provided at a neutral position where the rolling adjustment lever (47) is not inclined, and is disposed between the rolling adjustment lever (47) and the left and right inclination valve (46), one end of the rolling adjustment lever (47). An adjustment cable (48) that is connected to the adjustment lever (47) and transmits the amount of movement of the rolling adjustment lever (47) due to the turning operation to the other end, and is disposed on the other end side of the adjustment cable (48). And an urging spring (129) for urging the adjustment cable (48) toward the other end, and the urging force of the neutral return spring (125) With a larger configuration than the urging force of the energizing spring (129), the vertical movement mechanism (19) is the front-rear swing links that swings back and forth while rotating about the driven fulcrum (90) (80, 81), a vertically swinging link (82, 83) swinging up and down, one end of which is connected to the front / rear swing link (80, 81) and the other end connected to the planting tool (28), A pivoting member (84) that pivots about a forward / backward swing drive shaft (88) to actuate the forward / backward swing link (80, 81), and a pivot about a vertical swing drive shaft (89) And a vertically swinging member (85) for operating the vertically swinging link (82, 83), and the vertically swinging drive from the longitudinal swinging drive shaft (88) by a rotating transmission chain (107). It is configured to transmit to the shaft (89), and the driven fulcrum (90 Was the inside of the circular path of the transmission chain (107), and configured to and is positioned the and below the straight line connecting the front and rear swing drive shaft (88) and the vertical swing drive shaft (89) implanted Machine.

  According to a second aspect of the present invention, the rolling adjustment lever (47) includes an operation lever portion (127) operated by hand, and an adjustment arm portion (128) extending in a perpendicular direction from a central portion of the operation lever portion (127). And rotating about the central portion of the operation lever portion (127), and the one end of the adjustment cable (48) is connected to the tip of the adjustment arm portion (128), One end of the neutral return spring (125) is connected to the operation lever portion (127), the other end of the neutral return spring (125) is fixed to the handle (16), and the rolling adjustment lever (47) 2. The transplanter according to claim 1, wherein when the is in the neutral position, the one end portion of the adjustment cable (48) is oriented in parallel to the operation lever portion (127).

  The invention according to claim 3 includes a grounding stand (142) that can be accommodated by flipping up, a handle (16) at a rear end of the main body main frame (22), and the grounding main frame (22) with the grounding stand. The stand (142) is connected, and the grounding stand (142) that is flipped up is stored in a rear-up position below the rear-up part of the rear side of the main body frame (22). Item 3. The transplanter according to Item 2.

  According to a fourth aspect of the present invention, a handle (16) is provided at a rear end portion of the airframe main frame (22), and the grounding stand (142) is disposed on the left and right sides of the airframe main frame (22). A base plate (143) having at least two notches (144) for holding in the stowed position is attached, and the grounding stand (142) is a stand support for connecting the two base plates (143). A stand supporting hole (150) through which the shaft (145) passes, a stand locked shaft (146) locked by the notch (144) of the two base plates (143), and the stand supporting shaft (145) and a position fixing spring (140) for urging so as to reduce the distance between the stand-locked shaft (146), and the stand The transplanting machine according to claim 3, wherein the holding hole (150) is a long hole, and the interval between the stand support shaft (145) and the stand locked shaft (146) can be changed. is there.

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  A first related invention related to the present invention includes a support frame (111) having one end rotatably attached to the airframe and the other end fixed to the hole making body (110), and the support frame (111). A drilling rod (112) whose lower end is pivotably connected to the drilling hole, and a drilling lift arm (113) whose one end is pivotally fixed and the other end is coupled to the drilling rod (112). The hole making lift arm (113) has a driven contact member (116) that contacts the hole making body vertical movement member (115) that is driven to rotate, and the hole making body rod (112) moves up and down. Thus, the support frame (111) pivots up and down and the hole making body (110) moves up and down, so that the planting tool (28) transplants the transplant object to be planted at the position of the field where the transplant object is planted. Make the hole shallower than the attachment depth, A stopper pin (121) is attached in the middle of the longitudinal direction of the rod (112), and the hole-making rod (112) is passed through a through-hole of the stopper (117) fixed to the machine body, 121) is configured to regulate the downward movement of the boring body rod (112) by contacting the upper surface of the stopper (117), and the load is adjusted to a position below the stopper pin (121) of the boring body rod (112). A pin (122) is attached, and a pressing spring (118) is provided between the load adjustment pin (122) and the stopper (117) to urge the hole making body (110) downward. The pressing spring (118) is a load The adjustment pin (122) and the stopper (117) are urged so as to push away from each other, and the stopper pin (121) and the load adjustment pin (122) Anatai mounting position of the rod (112) are each modifiable configuration as the transplanter.

A second related invention related to the present invention is a structure in which a hole shallower than the planting depth of the transplant object to be planted is formed at the position of the field where the planting tool (28) plants the transplant object by moving up and down. Anatai the (110) provided on one lateral side of the protruding drive shaft to the left and right (89) of the planting transmission case (26), drives the lifting link mechanism (29) for lifting the planting device (28) up and down Drilling body vertical movement member (115) provided with a swinging member (85) and actuating the drilling body (110) on the left and right other side
Is a transplanting machine.

  According to a third related invention related to the present invention, when the hole making body (110) descends and contacts the field, the hole making body rod (112) is perpendicular to the support frame (111) in a side view. It is the transplanter of the 1st related invention which becomes the direction which makes | forms.

  The fourth related invention related to the present invention is provided with a pressing spring (118) for urging the hole making body (110) downward, and the hole making body vertical movement member (115) is attached to the pressing spring (118). It is the transplanter of the 1st or 3rd related invention made into the structure which moves a hole making body (110) upwards against power.

  A fifth related invention related to the present invention includes a handle (16) at the rear end of the main body main frame (22), and the main body main frame (22) is located on the right side or the left side of the center position of the left and right sides of the airframe. A grounding stand (142) which is disposed in a shifted manner and can be accommodated by being flipped up is provided. When the grounding stand (142) is placed in the grounding position, the grounding portion (147, 148) has a grounding portion (147). 149) is a transplanter configured to be displaced to the left and right center side of the aircraft.

  Further, a sixth related invention related to the present invention includes a traveling unit (13, 14) for traveling the airframe, and a planting tool (28) provided on the airframe for planting a transplant object by opening and closing a downward tip. ) And a vertical movement mechanism (19) for moving the planting tool (28) up and down, and the vertical movement mechanism (19) swings back and forth while rotating around a driven fulcrum (90). Back and forth swing link (80, 81), one end connected to the back and forth swing link (80, 81), the other end connected to the planting tool (28), the up and down swing link (82, 83), a front / rear swing member (84) for rotating the front / rear swing drive shaft (88) to operate the front / rear swing link (80, 81), and a vertical swing drive shaft ( 89) Rotating up and down to operate the vertical oscillating link (82, 83) And a transmission chain (107) that is circulated to transmit power from the longitudinal swing drive shaft (88) to the vertical swing drive shaft (89), and the driven fulcrum (90) A transplanter that is arranged inside the circulation path of the transmission chain (107) and below a straight line connecting the front and rear swing drive shaft (88) and the vertical swing drive shaft (89). is there.

  Further, according to a seventh related invention related to the present invention, the vertical movement mechanism (19) includes an input arm (101) disposed on the drive side and an output arm (104) connected to the planting tool (28). ) And a connecting rod (103) for connecting the input arm (101) and the output arm (104), and the output arm (104) rotates as the input arm (101) rotates. Thus, an open / close mechanism (104, 105) for opening and closing the planting tool (28) is provided, and the connecting rod (103) is moved from the rotation center (95) of the output arm (104) to the output arm (104). ) To the position where the connecting rod (103) is connected to the input arm (101) from the rotation center (92) of the input arm (101). Too short second An implantable device of the related inventions.

An eighth related invention related to the present invention is a support frame (111) having one end rotatably attached to the machine body and the other end fixed to the hole making body (110), and the support frame. A rod-shaped hole body rod (112) whose lower end is pivotably connected to (111), one end of which is pivotally fixed, and the other end is coupled to the upper portion of the hole body rod (112). A hole lift arm (113), the hole making lift arm (113) has a driven contact member (116) that contacts the hole making body vertical movement member (115), and the hole making body vertical movement member When (115) rotates, the driven contact member (116) that comes into contact with the hole making body vertical movement member (115) moves upward according to the peripheral shape of the hole making body vertical movement member (115). , According to the upward movement of the driven contact member (116) The hole making rod (112) moves upward, and the hole making body (110) fixed to the support frame (111) moves upward together with the support frame (111). It is a transplanter.
A ninth related invention related to the present invention includes a planting tool (28) for planting a transplant object by opening and closing a downward tip, and a vertical movement mechanism (19) for moving the planting tool (28) up and down. And when the planting tool (28) starts to open before reaching the bottom dead center of the vertical movement, the planting tool (28) The upward speed component of the tip of the planting tool (28) generated by opening is the downward speed component of the part of the planting tool (28) that does not open and close by the vertical movement mechanism (19). The transplanter according to any one of the first to eighth related inventions having a smaller configuration.
A tenth related invention related to the present invention includes a planting tool (28) for planting a transplant object and a vertical movement mechanism (19) for moving the planting tool (28) up and down. The moving mechanism (19) includes a front / rear swing link (80, 81) that swings back and forth while rotating about a driven fulcrum (90), and one end of each link to the front / rear swing link (80, 81). There are two vertically swinging links (82, 83) that are connected and whose other ends are connected to the planting tool (28) and swing upward and downward. When the first fulcrum (95) connected to the planting tool (28) moves up and down, the vertical rocking link (83) arranged below in the front-rear direction moves the planting tool (28). Of the first to ninth related inventions which are always behind the second fulcrum (96) connected to An implantable device according to any Re.

According to the invention which concerns on Claim 1, the inclination of the left-right direction of a body can be easily controlled by an operator's hand. In addition, the rolling adjustment lever (47) can be returned to the neutral position with a simple configuration. Furthermore, the right and left tilt valve (46) can be operated without rattling.
Further, since the driven fulcrum (90) is disposed below the straight line connecting the front / rear swing drive shaft (88) and the up / down swing drive shaft (89), the drive of the front / rear swing drive shaft (88) is performed. Even if the transmission chain (107) that transmits the force to the vertical swing drive shaft (89) is loosened, it does not easily hit the driven fulcrum (90), and the drive force can be stably transmitted to the vertical swing drive shaft (89).
Further, the front / rear swing drive shaft (88), the up / down swing drive shaft (89) and the driven fulcrum (90) can be compactly arranged .

  According to the invention of claim 2, in addition to the effect of the invention of claim 1, the rolling adjustment lever (47) can be configured in a compact manner.

  According to the invention of claim 3, in addition to the effect of the invention of claim 1 or claim 2, it can be stored by flipping up the grounding stand (142), so that the grounding stand (142) is not bent by the operator. Can be operated. Further, the grounding stand (142) can be stored without disturbing the operator.

  According to the invention of claim 4, in addition to the effect of the invention of claim 3, the operator can operate the grounding stand (142) easily and reliably.

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  Further, according to the first related invention related to the present invention, with a simple configuration, when the hole-making body (110) is lowered, it is quickly lowered, and when it is raised, it is smoothly raised. In addition, the load applied to the hole making body (110) and the depth of the hole created by the hole making body (110) can be easily changed with a simple configuration. Then, a shallow hole can be formed around the transplant object to be planted by the planting tool (28), and water can be irrigated, fertilizer can be applied, or a drug can be applied to the shallow hole. It is easy to establish and manage the transplanted objects.

According to the second related invention related to the present invention, the hole making body vertical movement member (115) rotates together with the vertical rocking member (85) for moving the planting tool (28) up and down, so that the hole making body (110 ) Moves up and down in synchronization with the lifting and lowering operation of the planting tool (28). Then, a shallow hole can be formed around the transplant object to be planted by the planting tool (28), and water can be irrigated, fertilizer can be applied, or a drug can be applied to the shallow hole. It is easy to establish and manage the transplanted objects.

  According to the third related invention related to the present invention, in addition to the effect of the first related invention related to the present invention, the hole making body (110) can easily enter the field.

  According to the fourth related invention related to the present invention, in addition to the effect of the first or third related invention, the hole-making body (110) is urged downward by the urging force of the pressing spring (118). As a result, the weight can be reduced as compared with the case where the hole making body (110) is urged downward using the weight.

  According to the fifth related invention relating to the present invention, the grounding stand (142) can be stored by being flipped up, so that the operator can operate the grounding stand (142) without bending down. In addition, the grounding stand (142) is configured so that the grounding part (149) deviates to the left and right central sides of the airframe with respect to the downwardly extending parts (147, 148) when it is in the grounding position. The airframe is stably supported by the stand (142).

  According to the sixth related invention relating to the present invention, the driven fulcrum (90) is disposed below the straight line connecting the front / rear rocking drive shaft (88) and the vertical rocking drive shaft (89). Even if the transmission chain (107) that transmits the driving force of the forward / backward swing drive shaft (88) to the up / down swing drive shaft (89) is loosened, it does not easily hit the driven fulcrum (90), and the drive force is stably stabilized. (89). Further, the front / rear swing drive shaft (88), the up / down swing drive shaft (89) and the driven fulcrum (90) can be compactly arranged.

  According to the seventh related invention related to the present invention, in addition to the effect of the fifth related invention, a rotation angle larger than the rotation angle of the input arm (101) can be generated in the output arm (104). Therefore, the planting tool (28) can be opened and closed at a smaller rotation angle of the input arm (101) than in the prior art. Moreover, since the rotational displacement amount of the input arm (101) for opening and closing the planting tool (28) can be reduced, the opening / closing drive cam (100) can be downsized. Furthermore, since the output arm (104) can be shortened, the seedling guide (108) can be lowered and the position of the supply turntable (32) can be lowered.

According to the eighth related invention related to the present invention, in addition to the effects of the sixth related invention, with a simple configuration, the hole making body (110) is quickly lowered when it is lowered and smoothly raised when it is raised.
According to the ninth related invention related to the present invention, in addition to the effect of the invention according to any of the first to eighth related inventions, the planting tool (28) is opened in consideration of the assisting force received from the field. When starting, the upward speed component of the tip of the planting tool (28) generated by the opening of the planting tool (28) does not move the planting tool (28) by the vertical movement mechanism (19). By making it smaller than the downward speed component of these parts, these vertical speed components are offset and become zero, so that a flat hole can be formed in the field. Moreover, since the tip part is pushed into the field while the planting tool (28) is opened, it is easy to release the seedling from the planting tool (28).
According to the tenth related invention related to the present invention, in addition to the effect of the invention according to any of the first to ninth related inventions, when the planting tool (28) is lowered, the upper and lower positions arranged above Since the distance between the swing link (82) and the vertically swing link (83) disposed below is not narrowed, the top and bottom disposed above when the planting tool (28) is near the bottom dead center. The distance between the swing link (82) and the vertically swing link (83) arranged below can be maintained wide, and stable planting can be performed without rattling in the planting state.

The left view of the tobacco seedling transplanter of embodiment of this invention The top view of the tobacco seedling transplanter of embodiment of this invention (A) The bottom view which looked at the seedling supply part of embodiment of this invention from the bottom, (b) The partially transparent top view of the seedling supply part of embodiment of this invention Side sectional view explaining attachment structure of seedling supply part of an embodiment of the invention The perspective view seen from the left front of the planting apparatus of embodiment of this invention The perspective view seen from the right rear of the planting apparatus of embodiment of this invention The side view of the planting apparatus of embodiment of this invention The figure explaining the arrangement position of each drive shaft in the planting drive transmission case of an embodiment of the invention The figure explaining the movement locus | trajectory of the front-end | tip part of the planting tool of embodiment of this invention seen from back The graph which showed the locus | trajectory of the front-end | tip part of the right side member of the planting tool of embodiment of this invention seen from back Side view of hole making body vertical movement mechanism part of embodiment of this invention (A) A plan view of a hole making lift arm portion according to an embodiment of the present invention, (b) a plan view of a stopper portion according to an embodiment of the present invention, (c) a hole making body portion according to an embodiment of the present invention Plan view The side view of the connection mechanism part for controlling the height of the body of the tobacco seedling transplanter of embodiment of this invention (A) Side view of the balance connecting stay of the embodiment of the present invention, (b) Plan view of the balance connecting stay of the embodiment of the present invention (A) Front view of the balance according to the embodiment of the present invention, (b) Plan view of the balance according to the embodiment of the present invention (A) Side view of hydraulic rod of embodiment of the present invention, (b) Plan view of hydraulic rod of embodiment of the present invention The top view for demonstrating the connection relation of each part of the linkage mechanism of the body height control of the tobacco seedling transplanter of embodiment of this invention The schematic plan view for demonstrating the rolling adjustment lever of the modification of the tobacco seedling transplanter of embodiment of this invention (A) Schematic plan view of the rolling adjustment lever portion according to the embodiment of the present invention, (b) Schematic plan view of the left / right tilt switching valve portion according to the embodiment of the present invention. (A) The side view which shows the attachment part of the ground stand of embodiment of this invention, (b) The top view which shows the attachment part of the ground stand of embodiment of this invention (A) Left side view of the grounding stand according to the embodiment of the present invention, (b) Front view of the grounding stand according to the embodiment of the present invention. The top view for demonstrating arrangement | positioning of the reserve seedling mounting stand of embodiment of this invention (A) Side view of the spare seedling mounting table of the embodiment of the present invention, (b) Rear view of the spare seedling mounting table of the embodiment of the present invention Side view of conventional vegetable seedling transplanter An enlarged side view of the main part of a conventional planting device for a vegetable seedling transplanter Link configuration diagram of conventional vegetable seedling transplanter planting device

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

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FIG. 1 is a side view showing a tobacco seedling transplanter 10 for transplanting tobacco seedlings as an example of a transplanter according to an embodiment of the present invention, and FIG. 2 is a plan view of the tobacco seedling transplanter 10.

  In the drawings of the present application, unless otherwise specified, the left side of the drawing is the front of the tobacco seedling transplanter.

  As shown in FIG. 1, the tobacco seedling transplanter 10 includes an engine 11 and a main transmission case 12 at the front, a pair of left and right front wheels 13 and rear wheels 14 as traveling wheels, and a planting device 19 and a seedling at the rear. A supply unit 31, a pressure reducing wheel 15 and a steering handle 16 are provided.

  The front wheel 13 and the rear wheel 14 are an example of the traveling unit of the present invention, and the steering handle 16 is an example of the handle of the present invention. In addition, a seedling of tobacco seedling corresponds to an example of the transplant object of the present invention.

  The tobacco seedling transplanter 10 has a front wheel 13 and a rear wheel 14 traveling between the ridges so that the traveling machine body straddles the ridge U in the field. Planting seedlings.

  2, the left and right ends of the main transmission case 12 are respectively provided with left and right travel extension cases 40 that can rotate with respect to the main transmission case 12, and the respective end portions of the left and right travel extension cases 40 are provided. A traveling chain case 20 is attached to the vehicle. Therefore, the power in the main transmission case 12 input from the engine 11 is transmitted into the traveling chain case 20.

  A pair of left and right rear wheels 14 which are traveling wheels are respectively attached to the left and right outer sides of the rotating tip of the traveling chain case 20, and the airframe travels by driving the pair of left and right rear wheels 14. Therefore, the main transmission case 12 is a transmission device that transmits to the rear wheel 14 as a traveling wheel.

  On the other hand, a front wheel support frame 41 extending in the left-right direction is provided at the lower portion of the engine mounting table so as to be rotatable around the rolling shaft 18 in the front-rear direction (see FIG. 1). It is configured to be installed.

  Further, as shown in FIG. 2, a rear frame 21 extending in the left-right direction is fixedly provided at the rear end of the main transmission case 12, and the right end of the rear end surface of the rear frame 21 is front and rear at a position on the right side of the fuselage. A main frame 22 extending in the direction is provided. A steering handle 16 is provided at the rear end of the main frame 22, and the steering handle 16 is supported by the main transmission case 12 via the main frame 22 and the rear frame 21. The planting transmission case 26 is fixedly provided on the upper surface of the rear frame 21 on the left or right side (right side) with the front lower end portion of the planting transmission case 26 mounted thereon.

  In addition, a hydraulic lifting cylinder 23 is provided at the rear portion of the main transmission case 12 in the center in the left-right direction. The hydraulic lift cylinder 23 is fixedly provided to a hydraulic pressure switching valve portion 24 (see FIG. 1) attached to the main transmission case 12, and an oil passage from a hydraulic pump attached to the main transmission case 12 is connected to the hydraulic pressure switching valve. It is operated by switching at the unit 24.

  Also, a horizontal rod 43 extending left and right is provided at the rear end of the cylinder rod of the hydraulic lifting cylinder 23, and a left rear wheel lifting rod 44 and a right rear wheel lifting rod 45 serving as rods are provided at the left and right ends of the horizontal rod 43, respectively. The other ends of the left rear wheel lifting rod 44 and the right rear wheel lifting rod 45 are pivotally attached to the upper arm 40a attached to each traveling extension case 40, and the horizontal rod 43 and the traveling extension case 40 are coupled. It has been configured.

  Accordingly, the travel chain case 20 is rotated around the left and right output shafts of the main transmission case 12 via the horizontal rod 43, the left rear wheel lifting rod 44 and the right rear wheel lifting rod 45 by the expansion and contraction of the hydraulic lifting cylinder 23, As the traveling chain case 20 is rotated, the rear wheel 14 is moved up and down to raise and lower the traveling machine body. It should be noted that the cylinder rod, the horizontal rod 43, the left rear wheel lifting rod 44 and the right rear wheel lifting rod 45 of the hydraulic lifting cylinder 23 are located below the lifting link mechanism 29, which will be described later in side view, depending on the advancement position of the cylinder rod. The structure is positioned, and space is effectively used to make the aircraft more compact.

  Further, at a position just below the position where the planting tool 28 of the planting device 19 plants the seedlings on the cocoon U at a position below the center of the machine body, the height of the cocoon U upper surface is in contact with the known cocoon U upper surface. The left ground contact position detection body 36 and the right ground contact position detection body 37 are provided, and the lifting / lowering provided in the hydraulic pressure switching valve unit 24 by detecting the heel U of the left ground contact position detection body 36 and the right ground contact position detection body 37 is provided. The hydraulic elevating cylinder 23 is operated through the control switching valve to raise and lower the left and right rear wheels 14, and the traveling body is controlled to a predetermined height with respect to the heel U, and the planting tool 28 sets the seedling to the heel U. The planting depth is constant.

  Further, a left / right tilt hydraulic cylinder 25 that is actuated by hydraulic pressure from a hydraulic pump is provided in the middle of the left rear wheel lift rod 44 so that the left rear wheel lift rod 44 extends and contracts. The left rear wheel 14 is moved up and down with respect to the vertical position of the right rear wheel 14 by the expansion and contraction of the right and left, and the traveling machine body is controlled to a desired left and right inclined posture regardless of the unevenness of the valley portion of the heel U. .

  A pendulum-type left / right tilt sensor 42 is provided on the right side of the main transmission case 12, and the left / right tilt sensor 42 detects the left / right tilt via a left / right tilt switching valve provided in the hydraulic pressure switching valve unit 24. The hydraulic cylinder 25 is actuated to control the traveling machine body to a desired left / right inclined posture.

  The planting device 19 of the present embodiment includes a planting transmission case 26 provided on the rear side of the main transmission case 12 with power from within the main transmission case 12 in order to plant seedlings one by one on the vine of the field. It is transmitted and operated through a planting device drive case 27 attached to the planting transmission case 26.

  The planting device 19 includes a cup-shaped planting tool 28 with a sharp tip and an elevating link mechanism 29 that operates to raise and lower the planting tool 28. As shown in FIG. 1, the tip of the planting tool 28 has a shape that descends on the front side and rises on the rear side as shown in FIG. It draws a locus 17 and operates repeatedly in the direction of the arrow in the figure.

  The planting device 19 corresponds to an example of a vertical movement mechanism that moves the planting tool of the present invention up and down. Further, the locus 17 corresponds to an example of the operation locus of the present invention.

  Moreover, when planting a seedling with the planting tool 28, the hole making body 110 which forms a shallow hollow hole in the field around the planted seedling is provided. A hole-forming support frame 111 that supports the hole-forming body 110 at one end is rotatably attached to the main frame 22 so that the hole-forming body 110 can move up and down.

  In addition, a hole making rod 112 is connected to the middle portion of the hole making support frame 111. When the hole making rod 112 is moved up and down, the hole making support frame 111 is moved up and down, and the hole making body is moved. The vertical movement of 110 is controlled.

  3A is a bottom view of the seedling supply unit 31 as viewed from below, and FIG. 3B is a partially transparent top view of the seedling supply unit 31 as viewed from above.

  FIG. 4 is a side cross-sectional view illustrating the attachment structure of the seedling supply unit 31, and shows a cross section passing through the rotation center of the supply turntable 32.

  As shown in FIG. 2, the seedling supply unit 31 is operated by the power from the turntable drive case 38 being transmitted by the rotational force transmission member 77.

  The seedling supply unit 31 includes a rotatable supply turntable 32 that is provided above the planting device 19 and that is fixedly arranged in a loop through eight supply cups 33 having openings at the upper and lower ends. A character-shaped supply cup opening / closing guide 35 and a rotation drive mechanism 78 for rotating the supply turntable 32 counterclockwise are provided.

  As shown in FIG. 4, the supply turntable 32 is a bonnet-shaped member whose outer peripheral edge is bent downward, and has eight holes opened at equal intervals close to the outer periphery of the circular flat portion. Opened and substantially cylindrical supply cups 33 are fixed through. In addition, a rotation shaft for rotating the supply turntable 32 counterclockwise by the rotational force from the rotation drive mechanism 78 is fixedly disposed at the center of the supply turntable 32.

  The rotation drive mechanism 78 is fixed to a support column 39 fixed to the airframe and is fixed to an auxiliary plate 79. The auxiliary plate 79 is fixed to the main frame 22 via an auxiliary plate support plate 132 fixed to the main frame 22.

  And as shown to Fig.3 (a), the opening-and-closing lid | cover 34 which can move to an up-down direction is provided in the bottom part of each supply cup 33, respectively.

  Also, as shown in FIG. 3A, below each supply cup 33, the supply cup 33 is positioned above the planting tool 28 by the rotation of the supply turntable 32 in the direction of arrow A. A substantially C-shaped supply cup opening / closing guide 35 with an annular part cut out is fixed to the column 39 so that the opening / closing lid 34 at the bottom of the supply cup 33 is opened only when it reaches P. The supply cup opening / closing guide 35 restricts the opening / closing lid 34 from opening at a position other than the predetermined position P by contacting and supporting the opening / closing lid 34 from below.

  In the tobacco seedling transplanting machine 10 according to the present embodiment, an operator walking with the traveling of the aircraft grabs the seedlings on the spare seedling mounting table 30 one by one and moves in the direction of arrow A according to the traveling of the aircraft. Each is put into the supply cup 33 which is rotating.

  When the opening / closing lid 34 of the supply cup 33 is opened at the predetermined position P, the seedlings in the supply cup 33 are supplied to the lower planting tool 28. The planting tool 28 enters the soil to a predetermined depth when it reaches the bottom dead center of the operation locus 17 shown in FIG. 1 and opens left and right like a birdcage, Drop and plant.

  Next, the detailed configuration and operation of the planting device 19 of the tobacco seedling transplanter 10 shown in FIG. 1 will be described.

  5 and 6 show a perspective view of the planting device 19 as viewed from the left front and a perspective view as viewed from the right rear, respectively. Moreover, in FIG. 7, the side view of the planting apparatus 19 is shown.

  As shown in FIGS. 5 to 7, the planting device 19 has a cup-shaped planting tool 28 that has a pointed tip that can be opened and closed to the left and right by receiving a seedling from an opening formed in the upper part, and the planting tool 28. It is comprised from the raising / lowering link mechanism 29 provided in the planting drive transmission case 106 which raises / lowers.

  The planting tool 28 generally holds a seedling in the state where the cup-shaped lower part with a sharp tip is closed, and opens to the left and right at the lowermost end of the planting locus 17 to plant the seedling in a cage. It is a typical configuration. A seedling guide 108 is attached to the upper part of the planting tool 28 so that the seedlings falling from the supply turntable 32 surely enter the planting tool 28.

  In the lifting link mechanism 29 of the present embodiment, the upper end is pivotally supported by the swing cam drive shaft 88 on the left side of the planting drive transmission case 106, and the lower end is pivotable by the lower front shaft 91. The upper end is fixed to the front swing arm 80 connected to the connection support plate 94 and the upper rear shaft 90 which is rotatable with respect to the planting drive transmission case 106, and the lower end is rotatable about the lower rear shaft 93. A front swing arm 80 and a left rear swing arm 81 provided in parallel with the front and rear are connected to the connection support plate 94. Further, the upper rear shaft 90 has the other end protruding to the right side of the planting drive transmission case 106, and the upper end of the right rear swing arm 99 is fixed to the right side of the planting drive transmission case 106.

  The planting drive transmission case 106 transmits the power output from the planting device drive case 27, penetrates the swing cam drive shaft 88 provided to project to the left side, and the planting drive transmission case 106 on the left and right sides. The projecting crank arm drive shaft 89 is driven.

  Further, the front end is pivotally supported by the upper shaft 92 and the lower rear shaft 93 of the connection support plate 94, respectively, and the rear end is pivoted by the rotation upper shaft 95 and the rotation lower shaft 96 of the planting tool 28, respectively. A parallel upper arm 82 and a lower left arm 83 are connected freely. On the right side of the planting drive transmission case 106, a right end pivotally supported by a lower end portion of the right rear swing arm 99 and a rear end pivotally connected to the right side of the planting tool 28. A lower arm 97 is provided.

  The lower right arm 97 is arranged in parallel with the lower left arm 83, and is connected to the lower left arm 83 by a left and right connecting rod 98 pivotally supported at both ends by the lower left arm 83 and the lower right arm 97, respectively.

  A crank arm 85 having a base fixed to a crank arm drive shaft 89 that protrudes to the right from the planting drive transmission case 106, and a rotation support shaft provided at the tip of the crank arm 85, one end of which is rotatable. A connecting arm 86 is provided that is pivotally supported and has the other end connected to a middle portion of the left and right connecting rods 98. The left and right connecting rods 98 are rotatably connected to the connecting arm 86.

  In addition, a rocking drive cam 84 that is fixed to a rocking cam drive shaft 88 that protrudes from the planting drive transmission case 106 and rotates to the left is provided, and left so as to contact the peripheral edge of the rocking drive cam 84. A rotation roller 87 is provided in the middle of the rear swing arm 81 near the upper rear shaft 90 so as to be rotatable.

  In addition, the front swing arm 80 and the left rear swing arm 81 are attached to the front of the machine body between the support pin provided on the planting device drive case 27 and the lower end of the left rear swing arm 81. A tension spring (not shown) is provided to urge the swing drive cam 84 and the rotation roller 87 into contact with each other.

  Further, a counter arm 104 for opening and closing the planting tool 28 is pivotally supported on a pivot upper shaft 95 to which one end of the upper arm 82 is connected.

  The open / close arm 101 is pivotally supported by an upper shaft 92 to which the other end of the upper arm 82 is connected, and the open / close arm 101 and the counter arm 104 are connected by a connecting rod 103. . The counter arm 104 is provided with a hole, and a pin 105 erected on the holder portion of the planting tool 28 is loosely fitted thereto.

  In addition, an opening / closing drive cam 100 that is fixed to the swing cam drive shaft 88 and rotates together with the swing drive cam 84 is provided, and is provided on the opening / closing arm 101 so as to contact the peripheral edge of the opening / closing drive cam 100. A roller 102 is provided. When the opening / closing drive cam 100 rotates according to the rotation of the swing cam drive shaft 88, the opening / closing arm 101 is acted on the opening / closing arm 101 at a predetermined timing.

  With such a configuration, the planting device 19 according to the present embodiment operates such that the tip of the planting apparatus 19 draws the locus 17 when the tobacco seedling transplanter 10 is stopped during the planting operation.

  Next, operation | movement of the planting apparatus 19 of this Embodiment is demonstrated.

  As the swing cam drive shaft 88 rotates, the swing drive cam 84 fixed to the swing cam drive shaft 88 rotates together with the swing cam drive shaft 88 and rotates in contact with the swing drive cam 84. The left rear swing arm 81 and the front swing arm 80 swing back and forth via the roller 87. At this time, the right rear swing arm 99 connected to the left rear swing arm 81 by the upper rear shaft 90 also swings back and forth together with the left rear swing arm 81.

  The front swing arm 80, the left rear swing arm 81, and the right rear swing arm 99 that swing mainly back and forth are an example of the front and rear swing link of the present invention. The swing drive cam 84 corresponds to an example of the front / rear swing member of the present invention, and the swing cam drive shaft 88 corresponds to an example of the front / rear swing drive shaft of the present invention.

  On the other hand, when the crank arm drive shaft 89 rotates, the crank arm 85 fixed to the crank arm drive shaft 89 rotates together with the crank arm drive shaft 89, and the lower left arm is connected via the connecting arm 86 and the left and right connecting rods 98. 83 and the lower right arm 97 swing up and down, and the upper arm 82 swings up and down together with the lower left arm 83.

  The lower left arm 83, the lower right arm 97, and the upper arm 82 that swing mainly up and down correspond to an example of the vertical swing link of the present invention. The crank arm 85 corresponds to an example of the vertical swing member of the present invention, and the crank arm drive shaft 89 corresponds to an example of the vertical swing drive shaft of the present invention.

  Accordingly, the front swing arm 80, the left rear swing arm 81, the right rear swing arm 99, the upper arm 82, the lower left arm 83, and the lower right arm 97 are all parallel link mechanisms. Maintains a vertically oriented posture, and its lower end operates by drawing a planting locus 17, so that the seedlings received in the planting tool 28 can be planted on the ridge U in a proper posture.

  As shown in FIG. 7, the planting apparatus 19 of the present embodiment has a rotational upper position where the upper arm 82 is connected to the position of the rotating lower shaft 96 to which the lower left arm 83 is connected in the planting tool 28. It is arranged in front of the shaft 95.

  By disposing the rotating lower shaft 96 in front of the rotating upper shaft 95, it is possible to suppress the interval between the upper arm 82 and the lower left arm 83 from being narrowed when the planting tool 28 is lowered.

  With this configuration, when the planting tool 28 is near the bottom dead center, the distance between the upper arm 82 and the lower left arm 83 can be maintained wide, so that stable planting can be performed without rattling in the planting state. The

  The upper arm 82 corresponds to an example of the vertically swinging link disposed above in the present invention, and the lower left arm 83 corresponds to an example of the vertically swinging link disposed below in the present invention. Further, the rotating upper shaft 95 corresponds to an example of the first fulcrum of the present invention, and the rotating lower shaft 96 corresponds to an example of the second fulcrum of the present invention.

  FIG. 8 is a diagram for explaining the arrangement position of each drive shaft in the planting drive transmission case 106, and shows a view from the left side of the machine body.

  As shown in FIG. 8, in the planting apparatus 19 of the present embodiment, the swing cam drive shaft 88 and the crank arm drive shaft 89 are arranged at substantially the same height. The upper rear shaft 90 penetrating the planting drive transmission case 106 from side to side is disposed at a position below a straight line connecting the center positions of the swing cam drive shaft 88 and the crank arm drive shaft 89. .

  The driving force transmitted from the planting device drive case 27 to the planting drive transmission case 106 is transmitted to the swing cam drive shaft 88. In the planting drive transmission case 106, the driving force of the swing cam drive shaft 88 is also transmitted to the crank arm drive shaft 89 via the transmission chain 107.

  The transmission chain 107 circulates around the upper rear shaft 90 in the planting drive transmission case 106, and the upper rear shaft 90 connects the center positions of the swing cam drive shaft 88 and the crank arm drive shaft 89. Since it is arranged at a position below the straight line, even if the transmission chain 107 is loosened, it does not hit the upper rear shaft 90, and the driving force can be stably transmitted to the crank arm driving shaft 89. Further, by arranging in this way, the swing cam drive shaft 88, the crank arm drive shaft 89, and the upper rear shaft 90 can be arranged in a compact manner.

  The upper rear shaft 90 is an example of the driven fulcrum of the present invention.

  Next, the opening / closing operation of the planting tool 28 will be described.

  In FIG. 7, when the opening / closing drive cam 100 rotates clockwise with the rotation of the swing cam drive shaft 88, and the peripheral edge of the open / close drive cam 100 contacts the opening / closing roller 102, the shape of the peripheral edge of the open / close drive cam 100. Accordingly, a force that rotates counterclockwise about the upper shaft 92 acts on the open / close arm 101.

  As the opening / closing arm 101 rotates counterclockwise, a pulling force acts on the connecting rod 103 toward the opening / closing arm 101, and the counter arm 104 rotates counterclockwise around the rotation upper shaft 95. A rotating force acts on the. As the counter arm 104 rotates counterclockwise, a force for raising the pin 105 acts. When an upward force is applied to the pin 105, the lower portion of the planting tool 28 opens, and the seedling received in the planting tool 28 falls.

  When the upward force is not applied to the pin 105, the planting tool 28 is configured to maintain the closed state of the lower portion, and when the upward force is applied to the pin 105. The lower part is open.

  The counter arm 104 and the pin 105 correspond to an example of the opening / closing mechanism of the present invention.

  As shown in FIG. 7, in the planting apparatus 19 of this embodiment, the turning radius L1 of the opening / closing output arm (counter arm 104) on the planting tool 28 side is set to open / close on the planting drive transmission case 106 side. It is smaller than the turning radius L2 of the input arm (opening / closing arm 101).

  Since the turning radius L1 of the counter arm 104 is smaller than the turning radius L2 of the opening / closing arm 101, the counter arm 104 rotates at a turning angle larger than the turning angle around the upper shaft 92 of the opening / closing arm 101. It rotates around the upper shaft 95.

  Therefore, the planting tool 28 can be opened and closed with a smaller rotation angle of the open / close arm 101 than in the prior art.

  In addition, since the rotational displacement amount of the opening / closing arm 101 for opening and closing the planting tool 28 can be reduced, the peripheral shape of the opening / closing drive cam 100 for moving the opening / closing roller 102 is changed to a shape having a small radius change amount. Thus, the opening / closing drive cam 100 can be reduced in size.

  Further, since the counter arm 104 can be shortened, the seedling guide 108 can be lowered and the position of the supply turntable 32 can be lowered. Moreover, the stroke of the raising / lowering link mechanism 29 can be lengthened, and the width | variety of the vertical motion of the planting tool 28 can be enlarged.

  The open / close arm 101 corresponds to an example of the input arm of the present invention, and the counter arm 104 corresponds to an example of the output arm of the present invention. Further, the turning radius L2 of the open / close arm 101 corresponds to an example of the length from the turning center of the input arm to the position where the connecting rod is connected to the input arm in the present invention. Further, the turning radius L1 of the counter arm 104 corresponds to an example of the length from the turning center of the output arm to the position where the connecting rod is connected to the output arm in the present invention.

  FIG. 9 is a diagram for explaining the trajectory of the tip of the planting tool 28 as viewed from the rear of the machine body.

  The lower part of the planting tool 28 is composed of the left member 109L and the right member 109R. When the planting tool 28 is lowered, the distal ends of the left member 109L and the right member 109R are separated and opened. Planting.

  In FIG. 9, the locus of the distal end portion of the left member 109L is indicated by a broken line, and the locus of the distal end portion of the right member 109R is indicated by a two-dot difference line.

  The left member 109L and the right member 109R are opened near the bottom dead center of the planting tool 28 to plant the seedlings, then risen open and closed before the seedlings are supplied from the supply turntable 32, The next seedling is supplied into the planting tool 28.

  The planting device 19 can freely adjust the opening / closing timing and the opening / closing speed of the planting tool 28 by changing the peripheral shape of the opening / closing drive cam 100.

  When the left member 109L and the right member 109R are opened, an upward speed component is generated along with a speed component in the left-right direction at the tip portions thereof. On the other hand, a downward speed component is generated in the entire planting tool 28 by the lifting link mechanism 29 until reaching the bottom dead center.

  In the present embodiment, when the planting tool 28 is opened, the upward speed component generated at the respective tip portions of the left member 109L and the right member 109R and the part where the planting tool 28 does not open and close, for example, on the rotation top The shape of the opening / closing drive cam 100 and the mounting angle to the swing cam drive shaft 88 so that the downward speed components at the mounting portions of the shaft 95 and the rotating lower shaft 96 are equal, that is, the speed components are canceled out. Is set.

  When the planting tool 28 is opened, the vertical velocity components at the tip portions of the left member 109L and the right member 109R become zero, so that the tip portions of the left member 109L and the right member 109R Will move horizontally.

  Therefore, a flat hole is formed in the field scene by opening each tip portion of the left member 109L and the right member 109R, and the seedling can be planted cleanly.

  FIG. 10 is a graph showing the trajectory of the tip of the right member 109R of the planting tool 28 as seen from the rear of the machine body.

  10, the locus of the tip of the right member 109R when the opening amount of the planting tool 28 is maximized is indicated by a solid line, and the locus of the tip of the right member 109R when the opening amount is minimized is indicated by a broken line. ing.

  The tip of the left member 109L (not shown) moves so as to draw a left-right symmetrical locus with the tip of the right member 109R.

  As shown in FIG. 10, when the planting tool 28 is opened, the distal end portion of the right member 109R moves with almost no change in position in the vertical direction, so that the distal end portion of the right member 109R and the distal end portion of the left member 109L move. A substantially flat hole is formed in the field.

  In addition, after the planting tool 28 descends and the tip portions of the left member 109L and the right member 109R come into contact with the field scene, the planting tool 28 receives resistance from the field due to the downward movement of the planting tool 28, and the left side. The movement in the opening direction of the member 109L and the right member 109R is assisted. In consideration of the assisting force received from the field, the planting tool 28 is opened at a timing and speed that is slower than the timing at which the vertical velocity component at the tip portions of the left member 109L and the right member 109R is theoretically zero. By doing so, it is possible to actually form a flat hole in the field.

  That is, in consideration of the assisting force received from the field, when the distal end portion of the planting tool 28 enters the field, the distal end portion of the left member 109L and the right member 109R when the planting tool 28 opens is generated upward. By setting the speed component to be smaller than the downward speed component of the portion where the planting tool 28 is not opened and closed, a flat hole can actually be formed in the field.

  Since the tip portions of the left member 109L and the right member 109R are pushed into the field while the planting tool 28 is opened, the seedlings can be easily released from the planting tool 28.

  Next, the detailed configuration and operation of the hole making body vertical movement mechanism of the tobacco seedling transplanter 10 shown in FIG. 1 will be described.

  The hole making body 110 descends when the seedling is planted in the field by the planting tool 28, and forms a concave hole shallower than the depth of the planted seedling around the planted seedling.

  FIG. 11: has shown the side view of the hole making body vertical movement mechanism part of the tobacco seedling transplanter 10 of this Embodiment. FIG. 11 shows only the part related to the hole making body vertical movement mechanism, and the other parts are not shown.

  As shown in FIG. 2, the hole making body 110 has a shape in which a U-shaped internal space is formed in a plan view, and the lower part enters the field to form a shallow concave hole in the field scene. It has become.

  The hole-forming support frame 111 having the hole-forming body 110 fixed to the tip is pivotally attached to the main frame 22 at the other end so that the hole-forming body 110 can move up and down.

  A base portion of a hole-making rod 112 provided upward is connected to a middle portion of the hole-making support frame 111 so as to be rotatable. The hole making body rod 112 has a hole making lift pin 120 standing above it, and is engaged with a rod lift plate 119 formed at the end of the hole making lift arm 113 by the hole making lift pin 120. The other end of the hole making lift arm 113 is pivotally attached to a hole making arm support shaft 114 protruding from the side surface of the planting drive transmission case 106.

  In addition, a drilling body drive cam 115 is provided which rotates fixedly to a crank arm drive shaft 89 protruding leftward from the planting drive transmission case 106. A hole-rotating roller 116 that is rotatably provided in the middle of the arm of the hole-making lift arm 113 is disposed so as to contact the peripheral edge of the hole-making body driving cam 115, and the hole-making body rod 112. The vertical position is a position corresponding to the position at which the hole making rotation roller 116 contacts the hole making body drive cam 115.

  As shown in FIG. 11, the hole making rotation roller 116 is disposed in front of the crank arm driving shaft 89 that is a fulcrum of the hole making body driving cam 115.

  By arranging the hole making rotation roller 116 in front of the fulcrum of the hole making body drive cam 115, when the hole making rotation roller 116 descends in response to contact with the hole making body drive cam 115, When the hole making rotation roller 116 is raised, it smoothly rises. When the hole making rotation roller 116 is lowered, the hole making body rod 112 is rapidly lowered, so that the hole making body 110 easily enters the field.

  The hole making body drive cam 115 is disposed between the lower left arm 83 and the lower right arm 97 as shown in FIG. By arranging the hole making body drive cam 115 between the lower left arm 83 and the lower right arm 97, the structure of the hole making body vertical movement mechanism can be reduced in size.

  The hole making support frame 111 is an example of the support frame of the present invention. The hole making body driving cam 115 corresponds to an example of the hole making body vertical movement member of the present invention, and the hole rotation roller 116 corresponds to an example of the driven contact member of the present invention.

  The boring body rod 112 is always subjected to a downward force due to the weight of the boring body 110 and the boring support frame 111, but is further increased by a push spring 118 arranged so that the boring body rod 112 passes inside. It is biased downward.

  A stopper 117 provided with a round hole for passing the hole-making rod 112 is fixed to the planting drive transmission case 106. On the other hand, a load adjustment pin 122 is attached to the lower portion of the hole making rod 112, and the push spring 118 is disposed between the stopper 117 and the load adjustment pin 122.

  The pressing spring 118 corresponds to an example of the pressing spring of the present invention.

  Since the stopper 117 is fixed to the planting drive transmission case 106, a downward force is applied to the load adjusting pin 122 by the push spring 118, and the hole-making body rod 112 is urged downward, and the hole-making body rod 112. The hole making body 110 and the hole making support frame 111 connected to the lower part are urged downward.

  The load adjusting pin 122 can change the attachment position to the hole making rod 112, and the load to the hole making body 110 and the hole making support frame 111 can be adjusted by the attachment position. As the load adjustment pin 122 is attached upward, the urging force of the push spring 118 increases, and the load applied to the hole making body 110 and the hole making support frame 111 can be increased.

  A stopper pin 121 for defining the lowest position of the hole making body 110 is attached to the upper part of the hole making body rod 112. The hole-making body rod 112 is regulated so as not to descend from the position where the stopper pin 121 contacts the upper surface of the stopper 117, and the position of the hole-making body 110 at that time is the lowest position of the hole-making body 110. Thereby, the hole of the same depth can always be created in the field scene by the hole making body 110.

  The stopper pin 121 can change the attachment position to the hole-making body rod 112, and the lowest position of the hole-making body 110, that is, the depth of the hole to be created can be adjusted by the attachment position. . As the stopper pin 121 is attached to the upper side, the length from the stopper pin 121 to the connection position with the hole making support frame 111 becomes longer, and the hole making body 110 descends further downward to create a deeper hole.

  12A shows a plan view of the hole making lift arm 113 portion, and FIG. 12B shows a plan view of the stopper 117 portion. FIG. 12C is a plan view of the hole making body 110 portion.

  As shown in FIG. 12B, the stopper 117 is formed with a round hole through which the hole-making body rod 112 is passed. On the other hand, the hole for passing the hole-making rod 112 of the rod lift plate 119 of the hole-making lift arm 113 is a long hole that is long in the front-rear direction.

  By swinging the hole making lift arm 113, the hole making body rod 112 moves back and forth at the engagement portion between the hole making lift arm 113 and the hole making body rod 112. Therefore, the hole making body rod 112 of the rod lift plate 119 is moved. Although the hole through which the hole is made is a long hole, the hole through which the hole making body rod 112 of the stopper 117 is passed is a round hole, thereby preventing the whole body making body rod 112 from moving back and forth.

  In the present embodiment, as shown in FIG. 11, when the hole making body 110 is lowered, the hole making body rod 112 is configured to be inclined backward, and the hole making body 110 is directed to the field. It is configured to push in.

  Further, when the hole making body 110 contacts the field, the angle formed by the hole making body rod 112 and the hole making support frame 111 is a right angle in a side view. By configuring in this way, it is possible to efficiently apply the urging force by which the hole making rod 112 descends to the hole making support frame 111 and the hole making body 110.

  Further, as shown in FIGS. 11 and 12C, a hole making scraper 123 is disposed above the hole making body 110.

  The hole making scraper 123 is disposed at a position where the tip of the hole making scraper 123 contacts the front surface portion of the hole making body 110 when the hole making body 110 moves upward.

  The lump attached to the front surface of the hole making body 110 when creating a hole in the field is removed by contacting the hole making scraper 123 when the hole making body 110 rises after the hole making.

  Next, the operation of the hole making body vertical movement mechanism configured as described above will be described.

  With the rotation of the crank arm drive shaft 89, the hole making body drive cam 115 rotates, and the hole making lift arm 113 is centered on the hole making arm support shaft 114 in accordance with a change in the shape of the peripheral edge of the hole making body drive cam 115. Rotate as

  As the hole making lift arm 113 rotates, the hole making body rod 112 that engages with the tip of the hole making lift arm 113 moves up and down. Then, the hole making body 110 moves up and down via the hole making support frame 111 in accordance with the vertical movement of the hole making body rod 112.

  The hole making body drive cam 115 rotates together with the crank arm drive shaft 89 that drives the crank arm 85 that controls the vertical movement of the elevating link mechanism 29 that moves the planting tool 28 up and down. It moves up and down in synchronization with the up-and-down movement of 28.

  The timing of the vertical movement of the hole making body 110 with respect to the raising / lowering operation of the planting tool 28 can be freely set by the peripheral shape of the hole making body driving cam 115.

  When the planting tool 28 is in the raised position, that is, when the seedling is supplied from the supply cup 33 to the planting tool 28, the hole making body 110 is also lifted upward, and the planting tool 28 is lowered and planted. When it is in the position, the hole making body 110 is set to a position where it is lowered to a position below the farm scene. At this time, by setting the lower surface of the hole making body 110 to a position slightly above the tip position of the planting tool 28, the seedling is planted in the field to a sufficient depth, and the seedling planted by the hole making body 110 is planted. A shallow dent can be formed in the field around the strain.

  By the hole making body vertical movement mechanism of the present embodiment, a shallow dent hole can be formed around the seedling planted by the planting tool 28, and after the seedling is planted or simultaneously with the planting, the seedling Water can be irrigated, fertilizer can be applied, and chemicals can be applied in shallow concave holes formed around the plant, so that planted seedlings can be easily cultivated and managed.

  Further, since the drilling body vertical movement mechanism is operated by the crank arm drive shaft 89 that is the drive shaft for moving the planting tool 28 up and down, the planting tool 28 and the hole making body 110 are driven by the same drive shaft. This reduces the drive timing error between the two, making it possible to plant seedlings well and to form shallow concave holes around the seedlings, facilitating the survival and management of the seedlings after transplanting. become.

  Next, in the tobacco seedling transplanter 10 of the present embodiment, the configuration and operation of a mechanism that controls the height of the aircraft to be constant with respect to the field scene will be described.

  In FIG. 13, the side view of the connection mechanism part for controlling the height of the body of the tobacco seedling transplanter 10 is shown. The tobacco seedling transplanter 10 includes a left-side grounding position detector 36 and a right-side grounding position detector 37 that independently detect the height of the upper surface of the cocoon U. FIG. The side view which looked at the right side contact position detection body 37 from the left side of the tobacco seedling transplanter 10 with illustration not shown is shown.

  FIG. 14A shows a side view of the balance connecting stay 51, and FIG. 14B shows a plan view of the balance connecting stay 51. FIG. 15A shows a front view of the balance 50, and FIG. 15B shows a plan view of the balance 50. FIG. 16A shows a side view of the hydraulic rod 55, and FIG. 16B shows a plan view of the hydraulic rod 55.

  Moreover, the top view for demonstrating the connection relation of each part of the connection mechanism of a body height control in FIG. 17 is shown.

  As shown in FIG. 14B, the balance connecting stay 51 has a surface perpendicular to the axial direction of the connecting stay round shaft portion 61 in the middle of the cylindrical connecting stay round shaft portion 61 bent at a right angle. The connecting stay round shaft portion 61 is penetrated to one end portion of the plate-like connecting stay plate portion 60 so as to be fixed by welding. The shaft portion on the bent side of the connecting stay round shaft portion 61 and the connecting stay plate portion 60 are configured to be V-shaped in a side view as shown in FIG. In addition, a cylindrical hydraulic rod connecting portion 62 is erected at the other end of the connecting stay plate portion 60.

  The shaft portion of the connecting stay round shaft portion 61 to which the connecting stay plate portion 60 is fixed is rotated around the tip portion of the right grounding body support bar 59 shown in FIG. 13 so that the axial direction thereof is the left-right direction of the machine body. The shaft is movably supported, and the shaft portion serves as a rotation shaft of the right ground contact position detector 37.

  As shown in FIGS. 15A and 15B, the balance 50 includes a long cylindrical balance rod portion 63 and a short cylindrical balance boss portion 64. The outer peripheral surface of the balance rod portion 63 is arranged at the central portion in the longitudinal direction of the balance rod portion 63 so that the height direction of the cylindrical shape of the balance boss portion 64 is perpendicular to the longitudinal direction of the balance rod portion 63. It is fixed by welding.

  As shown in FIG. 17, the right ground contact position detector 37 has a right balance connecting plate 71 and a right turn on the front right side of the surface of the curved right ground plate 70 in contact with the farm scene opposite to the surface in contact with the farm scene. A moving shaft support plate 72 is erected.

  The right balance connecting plate 71 and the right rotating shaft support plate 72 are formed with rotating shaft holes, and the connecting stay round shaft portion 61 of the balance connecting stay 51 is passed through these two rotating shaft holes. Thus, the right grounding plate 70 rotates up and down around the connecting stay round shaft 61.

  In addition, a long groove hole for engaging one end portion of the balance rod portion 63 of the balance 50 is formed in the upper portion of the right balance connecting plate 71.

  As shown in FIG. 17, the left ground contact position detector 36 has a left balance connecting plate 66 and a left turn on the front right side of the surface of the curved left ground plate 65 in contact with the farm scene opposite to the surface in contact with the farm scene. A dynamic shaft support plate 67 is erected.

  A rotation shaft hole is formed in the left balance connecting plate 66 and the left rotation shaft support plate 67. A grounding body rotation shaft 52 that is fixed to the front end portion of the left grounding body support bar 54 and extends in the left-right direction of the machine body is passed through these two rotation shaft holes and is centered on the grounding body rotation shaft 52. The left ground plate 65 rotates up and down.

  In addition, a long groove hole for engaging the other end portion of the balance rod portion 63 of the balance 50 is formed in the upper portion of the left balance connecting plate 66.

  As shown in FIGS. 16A and 16B, a connecting stay connecting shaft 75 is provided at one end of the hydraulic rod 55 in a direction perpendicular to the longitudinal direction of the hydraulic rod 55, and at the other end. A rotation stay connecting hole 76 for connecting to the rotation stay 56 is formed.

  As shown in FIG. 17, the connecting rod connecting shaft 75 is inserted into the cylindrical shape of the hydraulic rod connecting portion 62, so that the hydraulic rod 55 is rotatably connected to the balance connecting stay 51.

  In FIG. 17, the balance 50 and the shaft portion of the connecting stay round shaft portion 61 that engages with the balance 50 are omitted.

  The balance boss portion 64 of the balance 50 is inserted into the bent shaft portion of the connecting stay round shaft portion 61, that is, the shaft portion forming a V shape with the connecting stay plate portion 60 in a side view, and the shaft of the connecting stay round shaft portion 61 is inserted. The balance 50 can slide in the direction. Further, both end portions of the balance rod portion 63 of the balance 50 are engaged with the respective long groove holes of the left ground contact position detector 36 and the right ground contact position detector 37, and the respective end portions are movable in the long groove holes. It has become.

  A grounding body rotation shaft 52 extending in the left-right direction of the machine body is fixed to the left grounding body support bar 54, and a shaft portion serving as a rotation shaft of the connecting stay round shaft portion 61 is a grounding body rotation shaft 52. Are pivotally supported by the right grounding body support bar 59 at a coaxial position, so that the left grounding position detection body 36, the right grounding position detection body 37, and the balance connecting stay 51 are centered on the left and right coaxial. Rotate.

  The rotation stay 56 is attached so as to freely rotate about a rotation stay shaft 58 provided on the main frame 22. The hydraulic rod 55 is connected to the hydraulic rod connecting portion 62 of the balance connecting stay 51 by a connecting stay connecting shaft 75 provided at one end, and is connected to one end of the rotating stay 56 by a rotating stay connecting hole 76 formed at the other end. It is connected.

  Further, the other end of the rotation stay 56 is connected to the connecting rod 57, and the other end of the connecting rod 57 is connected to the hydraulic pressure switching valve unit 24.

  In response to the vertical movement of the connecting rod 57, the hydraulic lifting cylinder 23 is operated via the lifting control switching valve provided in the hydraulic switching valve portion 24, and the left and right rear wheels 14 are lifted and lowered.

  Next, the operation of the mechanism for controlling the height of the airframe thus configured to be constant will be described.

  When planting a seedling, when the upper surface of the cocoon U approaches the aircraft, the left ground plate 65 and the right ground plate 70 are pushed up along the upper surface of the cocoon U, and when the upper surface of the cocoon U moves away from the aircraft, Then, the left ground plate 65 and the right ground plate 70 are lowered.

  Here, a case will be described in which the left ground plate 65 and the right ground plate 70 are pushed up with the upper surface of the heel U approaching the aircraft.

  In FIG. 13, when the left ground plate 65 and the right ground plate 70 are pushed up, the left ground position detection body 36 and the right ground position detection body 37 are connected to the ground body rotating shaft 52 and the connecting stay round shaft portion that are coaxial in the left-right direction. It rotates counterclockwise around 61.

  When the left ground contact position detection body 36 and the right ground contact position detection body 37 rotate counterclockwise, a force in the forward direction of the fuselage is applied to the balance rod portion 63 whose both ends are engaged with the long groove holes, and the balance 50 is moved forward of the fuselage. Force is applied to the connecting stay round shaft portion 61 penetrating the balance boss portion 64, so that the balance connecting stay 51 is connected to the connecting stay round shaft portion 61 arranged in the left-right direction. It rotates counterclockwise around the center.

  When the balance connecting stay 51 rotates counterclockwise, a force to move the hydraulic rod 55 forward is applied, and the rotating stay 56 connected to the other end of the hydraulic rod 55 is centered on the rotating stay shaft 58. Rotate clockwise. When the rotating stay 56 rotates clockwise, the connecting rod 57 connected to the other end of the rotating stay 56 moves upward.

  When the connecting rod 57 moves upward, the hydraulic pressure switching valve unit 24 connected to the other end of the connecting rod 57 operates the hydraulic lifting cylinder 23 via the lifting control switching valve, and the left and right rear wheels 14 are lowered.

  When the left and right rear wheels 14 are lowered, the airframe rises with respect to the upper surface of the heel U, and the distance between the airframe and the upper surface of the heel U can be kept constant.

  When the seedling planting operation is performed, if the upper surface of the cocoon U moves away from the body, the left grounding plate 65 and the right grounding plate 70 are lowered along the upper surface of the cocoon U. In FIG. The right-side ground position detection body 37 rotates in the clockwise direction, and operates in the opposite manner to the above case in which the upper surface of the bag U approaches the body. That is, in this case, the connecting rod 57 moves downward, and the hydraulic pressure switching valve unit 24 operates the hydraulic lifting cylinder 23 via the lifting control switching valve to raise the left and right rear wheels 14. That is, in this case, the airframe descends with respect to the upper surface of the heel U, and the distance between the airframe and the upper surface of the heel U is kept constant.

  By controlling in this way, even if the upper surface of the cocoon U approaches or moves away from the aircraft, the distance between the aircraft and the upper surface of the cocoon U is kept constant, so that the seedling planting is too deep or too shallow. You can avoid it.

  The left grounding body support bar 54 and the right grounding body support bar 59 are attached to a frame support shaft 73 that is fixed to the airframe and arranged in the left-right direction. The shaft 73 can be turned around. By rotating the planting depth rod 53 back and forth, the left grounding body support bar 54 and the right grounding body support bar 59 also rotate together, and the left grounding body support bar 54 and the right grounding body support bar 59. The vertical position of the tip of the can be changed. Then, according to the rotation positions of the left grounding body support bar 54 and the right grounding body support bar 59, the grounding body rotating shaft 52 fixed to the front ends of the left grounding body support bar 54 and the right grounding body support bar 59, and The vertical position of the pivoted connecting stay round shaft 61 changes.

  Therefore, by adjusting the rotation position of the planting depth rod 53 back and forth, the vertical position of the rotation center axis of the left ground contact position detector 36 and the right ground contact position detector 37 can be changed. Depending on the planting depth, a constant distance between the aircraft and the upper surface of the ridge U can be adjusted.

  In addition, as shown in FIG. 13, three load regulating holes 74 are formed vertically in the rear upper part of the right balance connecting plate 71, and the right tension spring whose rear end is fixed to the frame support shaft 73 is formed. The front end of 69 is locked in one of the load defining holes 74.

  The right tension spring 69 applies an urging force that rotates the right ground contact position detector 37 clockwise in FIG. By changing the position of the load regulating hole 74 that locks the front end of the right tension spring 69, the urging force applied to the right ground contact position detector 37 changes. That is, according to the position of the load regulating hole 74 that locks the front end of the right tension spring 69, the ground load on the field of the right ground position detection body 37 can be adjusted. And the control sensitivity of the raising / lowering control changes according to the adjustment of the contact load of the right contact position detector 37.

  Similarly, with respect to the left ground contact position detection body 36, three load regulating holes 74 are formed vertically in the rear upper part of the left balance connecting plate 66, and the rear end is fixed to the frame support shaft 73. The front end of the spring 68 is locked in one of the load regulation holes 74 so that the ground contact load on the field of the left ground contact position detector 36 can be adjusted.

  Next, an operation when only one of the left ground contact position detection body 36 and the right ground contact position detection body 37 detects a change in the distance from the machine body to the top surface of the kite U due to a rough field and a clump of soil will be described. .

  Here, as an example, a case will be described in which the position of the upper surface of the kite U with respect to the aircraft on the left ground plate 65 side does not change, and there is a lump on the kite U on the right ground plate 70 side.

  When there is a soil mass on the right side of the ridge U with which the right ground plate 70 is in contact, the right ground plate 70 is pushed up along the soil mass, and in FIG. 13, only the right ground position detector 37 is disposed in the left-right direction. It rotates counterclockwise around the connecting stay round shaft 61.

  When the right ground contact position detector 37 rotates counterclockwise, a forward force is applied to one end portion of the balance rod portion 63 engaged with the long groove hole of the right ground contact detector 37, and the balance 50 is subjected to the body. A forward force is applied. At this time, since the left ground contact position detector 36 does not rotate, a force for moving forward is not applied to the other end side of the balance rod portion 63 engaged with the long groove hole of the left ground contact detector 36. Since the balance boss portion 64 of the balance 50 is fixed to the center position of both ends of the balance rod portion 63, the balance boss portion 64 moves a distance that is half of the movement distance of one end portion of the balance rod portion 63.

  Therefore, the connecting stay round shaft portion 61 penetrating the balance boss portion 64 is applied with a forward force corresponding to half the moving distance of one end portion of the balance rod portion 63. The balance connecting stay 51 rotates counterclockwise around the connecting stay round shaft portion 61 disposed in the left-right direction according to the forward force of the machine body.

  When the balance connecting stay 51 rotates counterclockwise, a force to move the hydraulic rod 55 forward is applied, and the rotating stay 56 connected to the other end of the hydraulic rod 55 is centered on the rotating stay shaft 58. Rotate clockwise. When the rotating stay 56 rotates clockwise, the connecting rod 57 connected to the other end of the rotating stay 56 moves upward. At this time, the upward movement amount of the connecting rod 57 is a movement amount corresponding to half the movement distance of the one end portion of the balance rod portion 63.

  Corresponding to the upward movement amount of the connecting rod 57, the hydraulic switching valve portion 24 connected to the other end of the connecting rod 57 operates the hydraulic lifting cylinder 23 via the lifting control switching valve, and the left and right rear wheels 14 are moved. As the aircraft is lowered, the aircraft rises relative to the upper surface of the kite U.

  At this time, the amount by which the aircraft rises with respect to the upper surface of the kite U is half of the amount of change approaching the kite U in the vertical direction detected by the left ground contact position detector 36.

  As described above, in the linkage mechanism that controls the height of the airframe of the present embodiment to be constant, the amount of change in vertical movement detected by each of the left ground contact position detector 36 and the right ground contact position detector 37 is averaged. The aircraft is controlled to move up and down according to the amount of change. Since the field scene is detected by averaging the detection by the two left ground contact position detectors 36 and the right ground contact position detector 37 arranged on the left and right, even if there is a clot on the ridge U, the body does not greatly fluctuate vertically. Stable lifting control can be performed and lifting control can be optimized.

  In the present embodiment, a case has been described in which a pendulum-type left / right tilt sensor 42 is provided, and the right / left tilt hydraulic cylinder 25 is operated by the detection of the left / right tilt sensor 42 to maintain the traveling machine body horizontally. However, the present invention is not limited to this, and for example, a configuration may be adopted in which a manual rolling adjustment lever for manually controlling the hydraulic cylinder 25 for right and left tilt is provided without including the left and right tilt sensor 42.

  FIG. 18 is a schematic plan view for explaining a rolling adjustment lever of a modification of the tobacco seedling transplanter 10 in the present embodiment.

  FIG. 19A shows a schematic plan view of the rolling adjustment lever portion, and FIG. 19B shows a schematic plan view of the left-right tilt switching valve portion.

  In the tobacco seedling transplanter 10 shown in FIG. 18, the rolling adjustment lever 47 is provided on the portion of the steering handle 16 that can be easily operated with the left hand when the steering handle 16 is held.

  The rolling adjustment lever 47 and the left / right inclination switching valve 46 are connected via an inclination adjustment cable 48. In FIG. 18, the illustration of the adjustment cable 48 for inclination is omitted.

  The left / right tilt switching valve 46 is an example of the left / right tilt valve of the present invention, and the tilt adjustment cable 48 is an example of the adjustment cable of the present invention.

  The rolling adjustment lever 47 includes an operation lever portion 127 that is operated by hand, and an adjustment arm portion 128 that is formed to extend from the middle of the operation lever portion 127 in a perpendicular direction. A portion connected to the adjustment arm portion 128 of the operation lever portion 127 is rotatably supported on a rolling lever support shaft 126 provided on the steering handle 16.

  In addition, the part connected with the adjustment arm part 128 of the operation lever part 127 corresponds to an example of the central part of the operation lever part of the present invention.

  One end of the operation lever portion 127 opposite to the hand operated side is connected to a neutral return spring 125 that is fixed to the steering handle 16 and is pulled by the neutral return spring 125. . When the operation lever portion 127 is operated by hand and then released from the operation lever portion 127, the rolling adjustment lever 47 returns to the neutral position where the tilt operation is not performed by the urging force of the neutral return spring 125.

  One end of an adjustment cable 48 for tilting is connected to the tip of the adjustment arm portion 128.

  By rotating the operation lever portion 127 by hand around the rolling lever support shaft 126, the tip of the adjustment arm portion 128 is also rotated, and the inclination adjustment cable 48 is moved in the longitudinal direction accordingly. Then, the movement amount in the longitudinal direction of the inclination adjustment cable 48 is transmitted to the other end side of the inclination adjustment cable 48.

  The rolling adjustment lever 47 is disposed so that the orientation of one end portion of the inclination adjustment cable 48 connected to the adjustment arm portion 128 is parallel to the longitudinal direction of the operation lever portion 127 when in the neutral state. ing. By arranging in this way, it is possible to suppress blurring of the adjustment cable 48 for inclination. Further, since the adjustment arm portion 128 is disposed at a right angle to the operation lever portion 127, the rolling adjustment lever 47 can be accommodated in a compact manner by being arranged in this way.

  The other end of the inclination adjusting cable 48 is connected to the other end of the inclination valve connecting bar 130 having one end connected to the left / right inclination switching valve 46, as shown in FIG.

  At the other end portion of the inclination adjustment cable 48, a rolling push spring 129 is provided so that the inclination adjustment cable 48 passes through the inside. One end of the rolling push spring 129 is fixed to a spring fixing portion 131 fixed to the airframe, and the connecting portion of the inclination adjusting cable 48 with the inclined valve connecting bar 130 is always pulled away from the spring fixing portion 131. Energized in the direction.

  The rolling push spring 129 is an example of the assisting spring of the present invention.

  Next, a rolling operation by operating the rolling adjustment lever 47 will be described.

  In FIG. 19A, when the operation lever portion 127 is rotated counterclockwise, the tip of the adjustment arm portion 128 is also rotated counterclockwise, and the inclination adjustment cable 48 is pulled toward the rolling adjustment lever 47 side. It is done. At this time, the operation lever portion 127 is operated against the urging force of the neutral return spring 125 and the urging forces of the rolling push spring 129.

  When the inclination adjustment cable 48 is pulled toward the rolling adjustment lever 47, the other end of the inclination adjustment cable 48 moves to the right in FIG. Since the end of the tilt valve connecting bar 130 connected to the tilt adjustment cable 48 moves to the right, the left / right tilt switching valve 46 rotates counterclockwise, and the left / right tilt switch valve 46 rotates. In response to the movement, the hydraulic cylinder 25 for tilting left and right operates, for example, the aircraft tilts to the right.

  In FIG. 19A, when the operation lever portion 127 is rotated clockwise, the tip of the adjustment arm portion 128 is also rotated clockwise, and the inclination adjustment cable 48 is located on the rolling adjustment lever 47 side. Loosen. At this time, since the operation is performed against the urging force of the neutral return spring 125, the urging force by the neutral return spring 125 does not act, but the rolling adjustment lever 47 is used for tilting left and right by the urging force of the rolling push spring 129. Pulled to the switching valve 46 side.

  When the tilt adjusting cable 48 is pulled toward the left / right tilt switching valve 46, the other end of the tilt adjusting cable 48 moves to the left in FIG. Since the end of the tilt valve connecting bar 130 connected to the tilt adjustment cable 48 moves to the left, the left / right tilt switching valve 46 pivots clockwise, and the left / right tilt switch valve 46 pivots. In response to this, the right / left tilt hydraulic cylinder 25 is actuated, for example, the aircraft is tilted to the left.

  In the present embodiment, a neutral return spring 125 having a stronger biasing force than the rolling push spring 129 is used.

  As a result, the left / right tilt switching valve 46 can be operated smoothly, and quickly returns to the neutral position when the operation lever portion 127 is released. If the neutral return spring 125 and the rolling push spring 129 having the same urging force are used, the operation of the left / right tilt switching valve 46 is likely to be loose.

  Thus, by providing the manual type rolling adjustment lever 47, the traveling machine body can be inclined to the left side which is the work position side, for example, so that the seedlings placed on the preliminary seedling placement table 30 are always working. Since the workers gather at the worker side, it becomes easier for the worker to replenish the seedlings to the supply cup 33.

  In the above description, the rolling pressing spring 129 is used as the assisting spring of the present invention to pull the tilt adjusting cable 48 to the left / right tilt switching valve 46. However, the tilt adjusting cable 48 and the tilt valve connecting bar 130 You may use the tension spring which pulls the connection part of this from the front.

  Further, the tobacco seedling transplanter 10 according to the present embodiment may be provided with a grounding stand.

  FIG. 20A is a side view of a mounting portion of the ground stand 142 when the flip-up type ground stand 142 is provided. The grounding stand 142 at the time of grounding is indicated by a solid line, and the grounding stand 142 at the time of storage is indicated by a two-dot chain line. FIG. 20B is a plan view of a portion where the grounding stand 142 is attached.

  FIG. 21A shows a side view of the grounding stand 142 as seen from the left, and FIG. 21B shows a front view of the grounding stand 142 as seen from the front.

  The ground stand 142 includes a left stand bar 147, a right stand bar 148, a ground stand bar 149, and a stand support shaft 145.

  A grounding stand bar 149 is fixed to ends of the left stand bar 147 and the right stand bar 148 arranged in parallel in a direction perpendicular to the left stand bar 147 and the right stand bar 148. As shown in FIG. 21 (b), the grounding stand bar 149 is displaced to the left and right center side of the machine body with respect to the left stand bar 147 and the right stand bar 148 so as to be L-shaped when viewed from the front. It is fixed to.

  This corresponds to the fact that the main frame 22 on which the left stand bar 147 and the right stand bar 148 are supported is arranged on the right side of the aircraft, and the grounding stand bar 149 is arranged at the left and right center positions of the aircraft. This is because. That is, in the case of the present embodiment, the grounding stand bar 149 is disposed so as to extend from the ends of the left stand bar 147 and the right stand bar 148 to the left side of the aircraft.

  The left stand bar 147 and the right stand bar 148 correspond to an example of a portion that extends downward when the ground contact position of the present invention is set, and the ground stand bar 149 corresponds to an example of the ground contact portion of the present invention.

  The grounding stand 142 is supported by being sandwiched between two stand support plates 143 fixed to the rear rising part of the main frame 22 at the rear of the machine body.

  The stand support plate 143 is formed with a hole for supporting the stand support shaft 145 and two cutouts 144 for locking the stand locked shaft 146. The stand support shaft 145 supports two stand supports. The plates 143 are connected.

  The left stand bar 147 and the right stand bar 148 are connected by a stand locked shaft 146, and a stand support hole 150 through which the stand support shaft 145 passes is formed. The stand support hole 150 is a long hole, and the position of the stand support shaft 145 in the stand support hole 150 is relatively movable in the long axis direction of the stand support hole 150. The interval between the locked shafts 146 can be changed.

  The stand support shaft 145 and the stand locked shaft 146 are connected by a stand lock spring 140. The stand lock spring 140 biases the stand locked shaft 146 toward the stand support shaft 145 side. doing.

  The stand support plate 143 corresponds to an example of the base plate of the present invention, and the stand locking spring 140 corresponds to an example of the position fixing spring of the present invention. The main frame 22 corresponds to an example of the main body frame of the present invention.

  The stand support shaft 145 passes through the stand support holes 150 formed in the two stand support plates 143, so that the ground stand 142 is rotatably supported by the stand support plate 143, and the stand locking spring 140. The stand locked shaft 146 is locked at the position of the two notches 144 provided on the stand support plate 143 by the urging force, so that the ground stand 142 is temporarily fixed at the ground position and the storage position.

  As shown in FIG. 20 (a), when stored, the ground stand 142 is stored in a posture along the rear upward portion of the main frame 22.

  With this configuration, the ground stand 142 can be switched to the ground position and the storage position with a single touch. In addition, since the flip-up direction is set to the rear, the ground stand 142 can be operated without bending.

  Here, two cutouts 144 are provided in each stand support plate 143 and temporarily fixed at the grounding position and the storage position. However, three or more cutouts are provided and three grounding stands 142 are provided. You may make it temporarily fix in the above predetermined position.

  Next, the arrangement and mounting structure of the spare seedling placement table 30 in the present embodiment will be described.

  FIG. 22 is a plan view for explaining the arrangement of the preliminary seedling mounting table 30, and the left side toward the paper surface is the front of the machine body. FIG. 23A shows a side view of the preliminary seedling placement table 30, and FIG. 23B shows a rear view of the preliminary seedling placement table 30 as seen from the rear of the machine body.

  The rectangle shown by the broken line in FIG. 22 indicates the position of the spare seedling tray 138 placed on the spare seedling placement table 30. It can be done.

  As shown in FIG. 1 and FIG. 22, the position of the rear end of the preliminary seedling mounting table 30 is behind the neutral position of the planting depth lever 49 and the hole making body rod 112. Is arranged.

  By arranging the preliminary seedling placement table 30 in this way, the preliminary seedling placement table 30 becomes close to the supply turntable 32 and the operation of supplying the seedlings to the supply cup 33 is facilitated.

  The preliminary seedling mounting table 30 includes two preliminary seedling stand columns 135 that are spaced apart from each other at the rear of the center, and the preliminary seedling support reinforcing plate 136 that is attached to the front part of the center. Is attached to the fuselage.

  A rod-shaped spare seedling support column 137 is fixed to the machine body frame in the left-right direction, and each of the spare seedling support columns 135 is set up so that two spare seedling support columns 135 stand on the preliminary seedling support frame 137. Is connected to the preliminary seedling support column support frame 137. In addition, one end of the spare seedling support reinforcing plate 136 is fixed to the body frame, and the support of the preliminary seedling placement table 30 is reinforced.

  In the present embodiment, a tobacco seedling is described as an example of the transplant object of the present invention, but the transplanter of the present invention can also be applied as a transplant machine for planting a transplant object other than a tobacco seedling. For example, it can be applied as a transplanter for transplanting seed potatoes such as potatoes.

  The transplanting machine according to the present invention can realize the opening / closing operation of the planting tool with a smaller rotation amount of the opening / closing input arm than conventional ones, so that it can be applied to a transplanting machine for planting transplanted objects such as seedlings and seed pods, High availability on.

DESCRIPTION OF SYMBOLS 10 Cigarette seedling transplanter 11 Engine 12 Main transmission case 13 Front wheel 14 Rear wheel 15 Pressure wheel 16 Steering handle 17 Trajectory 18 Rolling shaft 19 Planting device 20 Traveling chain case 21 Rear frame 22 Main frame 23 Hydraulic lifting cylinder 24 Hydraulic switching valve part DESCRIPTION OF SYMBOLS 25 Hydraulic cylinder for right-and-left inclination 26 Planting transmission case 27 Planting device drive case 28 Planting tool 29 Lifting / lowering link mechanism 30 Preliminary seedling placement stand 31 Seedling supply part 32 Supply rotation stand 33 Supply cup 34 Opening / closing lid 35 Supply cup opening / closing guide 36 Left side contact position detector 37 Right side contact position detector 38 Turntable drive case 39 Prop 40 Traveling extension case 40a Upper arm 41 Front wheel support frame 42 Left and right tilt sensor 43 Recumbency 44 Left rear wheel lifting rod 45 Right rear wheel lifting rod 46 Left and right Inclination switching valve 47 Rolling adjustment lever 48 Inclination adjustment cable 49 Planting depth lever 50 Balance 51 Balance connecting stay 52 Grounding body rotating shaft 53 Planting depth rod 54 Left grounding body support bar 55 Hydraulic rod 56 Rotary stay 57 connecting rod 58 rotating stay shaft 59 right grounding body support bar 60 connecting stay plate portion 61 connecting stay round shaft portion 62 hydraulic rod connecting portion 63 balance rod portion 64 balance boss portion 65 left ground plate 66 left balance connecting plate 67 left turn Shaft support plate 68 Left tension spring 69 Right tension spring 70 Right ground plate 71 Right balance connection plate 72 Right rotation shaft support plate 73 Frame support shaft 74 Load regulation hole 75 Connection stay connection shaft 76 Rotary stay connection hole 77 Rotation force transmission Member 78 Rotation drive mechanism 79 Auxiliary plate 80 Front swing arm 81 Rear left Moving arm 82 Upper arm 83 Lower left arm 84 Swing drive cam 85 Crank arm 86 Connection arm 87 Rotating roller 88 Swing cam drive shaft 89 Crank arm drive shaft 90 Upper rear shaft 91 Lower front shaft 92 Upper shaft 93 Lower rear shaft 94 Connecting support plate 95 Rotating upper shaft 96 Rotating lower shaft 97 Right lower arm 98 Right and left connecting rod 99 Right rear swing arm 100 Opening and closing drive cam 101 Opening and closing arm 102 Opening and closing roller 103 Connecting rod 104 Counter arm 105 Pin 106 Planting drive Transmission case 107 Transmission chain 108 Seedling guide 109L Left side member 109R Right side member 110 Drilling body 111 Drilling support frame 112 Drilling body rod 113 Drilling lift arm 114 Drilling arm support shaft 115 Drilling body drive cam 116 Drilling rotation Roller 117 Stopper 118 Press Spring 119 Rod lift plate 120 Drilling lift pin 121 Stopper pin 122 Load adjusting pin 123 Drilling scraper 125 Neutral return spring 126 Rolling lever support shaft 127 Operation lever portion 128 Adjusting arm portion 129 Rolling push spring 130 Tilt valve connecting bar 131 Spring fixing Part 132 Auxiliary plate support plate 135 Preliminary seedling support column 136 Preliminary seedling support auxiliary plate 137 Preliminary seedling column support frame 138 Preliminary seedling tray 140 Stand locking spring 142 Ground stand 143 Stand support plate 144 Notch 145 Stand support shaft 146 Stand engaged Stop shaft 147 Left stand bar 148 Right stand bar 149 Grounding stand bar 150 Stand support hole 151 Vegetable seedling transplanter 152 Seedling supply Part 153 Supply cup 154 Supply turntable 155 Planting device 156 Seedling storage part 160 Planting tool 161 Planting transmission part 162 Lifting arm 162a Front end of lifting arm 162 162b Connection point 162c Supporting point 163 Sub link 164 Swing arm 164a Swing Lower end of moving arm 164 165 Crank arm 166 Sub crank arm 167 Holder 170 Open / close lever 171 Connecting rod 172 Open / close arm 172a Roller 173 Open / close cam

Claims (4)

Downward tip body is opened and closed instill implant object planting device (28) provided with a vertical movement mechanism (19) for vertically moving the planting device (28), c on the rear end portion of the body In a transplanter equipped with a handle (16) ,
The lateral inclination valve for adjusting the inclination of the left and right directions on the body (46) is provided, arranged in the handle a rolling adjustment lever (47) for operating the lateral inclination valve (46) (16),
Neutral returning the rolling adjustment lever (47) to the neutral position without tilting the vehicle body in the lateral direction back provided a spring (125),
It is disposed between the rolling adjustment lever (47) and the left and right inclined valve (46), one end is connected to the rolling adjustment lever (47), and the amount of movement due to the rotating operation of the rolling adjustment lever (47) is reduced. An adjustment cable (48) that transmits to the other end, and an assisting spring (129) that is disposed on the other end side of the adjustment cable (48) and biases the adjustment cable (48) toward the other end side. The biasing force of the neutral return spring (125) is larger than the biasing force of the assisting spring (129) , and
The vertical movement mechanism (19) includes a front / rear swing link (80, 81) that swings back and forth while rotating about a driven fulcrum (90), and one end at the front / rear swing link (80, 81). Connected, the other end is connected to the planting tool (28), and the vertical swing link (82, 83) swings up and down, and the front and rear swing drive shaft (88) rotate around the front and rear. A vertical swing member (84) for operating the swing link (80, 81) and a vertical swing member (84) for operating the vertical swing link (82, 83) by pivoting about a vertical swing drive shaft (89). A moving member (85),
It is configured to transmit from the longitudinal swing drive shaft (88) to the vertical swing drive shaft (89) by a circulating transmission chain (107),
The driven fulcrum (90) is disposed inside the circulation path of the transmission chain (107) and below a straight line connecting the front / rear swing drive shaft (88) and the up / down swing drive shaft (89). configuration and the transplanter to be.   The rolling adjustment lever (47) includes an operation lever portion (127) operated by hand and an adjustment arm portion (128) extending in a right angle direction from a central portion of the operation lever portion (127), and the operation lever Rotating about the central portion of the portion (127), the one end of the adjustment cable (48) is connected to the tip of the adjustment arm portion (128), and is connected to the operation lever portion (127). When one end of the neutral return spring (125) is connected, the other end of the neutral return spring (125) is fixed to the handle (16), and the rolling adjustment lever (47) is in the neutral position, The transplanter according to claim 1, wherein the one end portion of the adjustment cable (48) is oriented parallel to the operation lever portion (127).   A grounding stand (142) that can be stored by flipping up is provided, a handle (16) is provided at the rear end of the main body main frame (22), and the grounding stand (142) is connected to the main body main frame (22), The transplanter according to claim 1 or 2, wherein the ground stand (142) that is flipped up is housed in a rear-up position below a rear-up part of the rear side of the main body frame (22).   A handle (16) is provided at the rear end of the machine main frame (22), and at least the left and right sides of the machine main frame (22) are provided for holding the ground stand (142) at a ground position and a storage position. A base plate (143) having two notches (144) is attached, and the grounding stand (142) is a stand through which a stand support shaft (145) connecting between the two base plates (143) passes. A support hole (150), a stand locked shaft (146) locked by the notch (144) of the two base plates (143), the stand support shaft (145) and the stand engaged And a position fixing spring (140) for urging so as to reduce the interval between the stop shafts (146), the stand supporting hole (150), A hole, transplantation machine according to claim 3 where the structure can be changed distance between the stand supporting shaft (145) and said stand Hikakaritomejiku (146).

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