TWI539895B - Seedling transplanter - Google Patents

Description

Seedling transplanter

The present invention relates to a seedling transplanting machine for transplanting rattan seedlings such as sweet potato seedlings.

There is known a seedling transplanting machine comprising: a traveling device having left and right front wheels and left and right rear wheels; a seedling transporting unit comprising a seedling transporting belt for transporting seedlings; and a seedling planting device for transporting the seedling transporting unit to the planting supply position. The seedlings are planted in the farmland; and the control handle is placed at the rear end of the body; the seedling planting device uses the crank arm and the swing link that drive the rotation to make the seedlings of the seeding supply position The seedling seed holding tool is operated on a long track before and after, and the seedling is planted in a farmland (see Patent Document 1 and Patent Document 2).

Next, by changing the rotational axis of the crank arm, that is, the drive shaft (the crank arm is attached to a different drive shaft), the drive rotation center position of the crank arm is changed, and the length of the track in the front-rear direction is changed. Again, with For the left and right earth-covering tools (covering wheels) for covering the soil on the left and right sides of the seedlings after planting. In addition, the seedling transporting unit and the seedling planting device are connected to each other in the vertical direction of the axis of the vehicle, and the seedling transporting unit and the seedling planting device are supported from the farmland surface by the grounding of the earth-covering tool (refer to the patent document). 1).

Further, a configuration is known in which a scraper is attached to remove soil adhering to the seedling holding tool during the withdrawal movement in which the seedling holding tool is withdrawn from the soil and moved, and the scraper is attached thereto. When the seedling holding tool is in the soil, the tool is retracted from the side of the trajectory toward the exiting state, and the urging force of the urging device is resisted by the urging force of the urging device during the aforementioned withdrawal movement and is forcibly moved toward the trajectory. The squeezing means applies a force to the squeegee on the opposite side (rear side) from the side on which the seedling holding tool is withdrawn and moved, that is, the squeegee is biased from the side of the trajectory toward the exit.

Moreover, it is known that the structure includes a pressing tool that presses the soil above the planted seedlings to move downward. The grounding tool is provided in a pressure-reducing frame that is rotated up and down, and the pressure-reducing frame is moved up and down while restricting the rotation of the downward movement side by the driving of the pressing cam (refer to Patent Document 2).

[Previous Technical Literature] [Patent Document]

Patent Document 1: Japanese Patent Laid-Open Publication No. 2003-284410

Patent Document 2: Japanese Patent Laid-Open Publication No. 2003-9616

The problem of the present invention is to improve planting accuracy.

In order to solve the above problems, the present invention adopts the following technical means.

In other words, the seedling transplanting machine according to the first aspect of the invention includes a traveling device (4), a seedling transporting unit (5) for transporting seedlings, and a seedling planting device (6) for transporting the seedling transporting unit (5). The seedlings planted in the planting supply position (A) are planted in the farmland; the seedling planting device (6) is used to hold the seedling seedling gripping tool (31) of the seedling feeding position (A) on the long track before and after (T) The seedlings are planted in the farmland, and are equipped with: left and right earth-covering tools, covering the soil around the seedlings after planting; and pressing tools (100), moving downwards between the left and right soil-covering tools and pressing the plants The soil above the seedlings; the grounding tool (100) is housed in the left and right earth-covering tools (92) when viewed from the side of the body in the pressed state, and is disposed on the back side when the soil-covering tool is used as a reference. The position of the offset; the pressing tool is disposed on the up-and-down rotating floor frame (101); the pressing frame (101) is driven up and down by the driving of the pressing cam (102) while restricting the rotation of the downward moving side. And having a fixing device that does not fix the pressing frame (101) up and down in the upward moving position .

According to a second aspect of the invention, the seedling transplanting machine according to the first aspect of the invention is characterized in that the front and rear positions of the pressing tool (100) are adjustable.

In the seedling transplanting machine according to the first or second aspect of the invention, the seedling transporting unit (5) and the seedling planting device (6) are provided so as to be swingable upward and downward, and the soil covering tool ( 92) grounding, supporting the structure of the seedling transporting unit (5) and the seedling planting device (6) from the farmland surface; adjusting the height of the soil covering tool (92) based on the seedling transporting unit (5) and the seedling planting device (6) The earth-covering tool height adjusting operation tool (97) is inclined to the left and right sides of the steering handle (2) and extends rearward, and is disposed below or below the steering handle (2).

According to the first aspect of the invention, the grounding tool and the pressing tool can be used to obtain a pressing action at a position close to the seedlings after the planting, and the planting posture can be appropriately maintained and planted accurately, thereby improving the planting accuracy of the seedlings. . Further, when the pressing posture is deteriorated by the pressing tool that moves downward, the fixing tool can be used to retract the position where the pressing tool constantly moves upward, thereby improving the planting accuracy. Further, the pressing tool can be easily retracted by a simple configuration of fixing the pressing frame (101) with a fixing tool and a simple operation.

According to the second aspect of the invention, in addition to the effects of the first aspect of the invention, the pressing action can be obtained at a position close to the seedlings after the planting, and the planting posture can be appropriately maintained and the planting can be carried out reliably, thereby improving the planting accuracy of the seedlings.

According to the third aspect of the invention, in addition to the effects of the first or second invention, the operating tool (97) can be adjusted by the height of the earth-moving tool which is inclined to the left and right sides of the steering handle (2) and extends rearward. Adjust the height of the earth-covering tool (92) near the bottom or bottom of (2).

1‧‧‧Miao transplant machine

2‧‧‧Manipulation handle

2a‧‧‧Handle

3‧‧‧ engine

4‧‧‧Traveling device

5‧‧‧Miao Transportation Department

5a‧‧‧Upper lateral transport

5b‧‧‧Drop conveyor

5c‧‧‧Upward conveyor

6‧‧‧ Seed planting device

7‧‧‧ Rear wheel

8‧‧‧ front wheel

9‧‧‧Transmission box

10‧‧‧ gearbox

11‧‧‧ Rear axle

12‧‧‧ Arm

13‧‧‧Hydraulic cylinders for lifting

14‧‧‧Balance rod

16‧‧‧After horizontal control hydraulic cylinder

17‧‧‧ Sensor

17a‧‧‧Main grounding section

17b‧‧‧Sub Grounding Section

18‧‧‧ Planting lifting rods

19‧‧‧Main clutch lever

20‧‧‧Front wheel support frame

21‧‧‧arm section

22‧‧‧Front axle

23‧‧‧Handle frame

26‧‧‧ seedling body

31‧‧‧ Seedling holding tool

31a‧‧‧Axis

31b‧‧‧Control Department

32‧‧‧ planting gearbox

32a‧‧‧First housing part

32b‧‧‧Second housing part

32c‧‧‧ third shell

34‧‧‧ drive arm

36‧‧‧Support link

37‧‧‧Swing link

38‧‧‧Support frame

40‧‧‧Connected shaft

41‧‧‧Clamping tool

41a‧‧‧ Combined base

41b‧‧‧ Pillars

42b‧‧‧ Bearing

43‧‧‧Opening and closing cam

43a‧‧‧

44‧‧‧ stretching spring

45‧‧‧ seed drop prevention board

46‧‧‧Support members

47‧‧‧Support plate

49‧‧‧ fixture

60‧‧‧ rolling limit tool

61‧‧‧ Soil support guide plate

62‧‧ ‧ soil guiding support shaft

63‧‧ ‧ soil guiding frame

64‧‧ ‧ soil guide wheel

65‧‧‧Linked cable

66‧‧‧ linkage rod

67‧‧‧Input shaft

68‧‧‧Bevel gear

69‧‧‧second axis

70‧‧‧first axis

71‧‧‧First drive sprocket

72‧‧‧First chain

73‧‧‧First driven sprocket

74‧‧‧Second drive sprocket

75‧‧‧Second chain

76‧‧‧Second driven sprocket

77‧‧‧ Planting clutch shaft (third shaft)

78‧‧‧planting clutch

80‧‧‧Strain-to-speed shifting mechanism

81‧‧‧ seedling platform support frame

82‧‧‧ seedling table

83‧‧‧ shift lever

83a‧‧‧The Department of Control

84‧‧‧ Constant speed gear

85‧‧‧Unequal speed transmission gear

86‧‧‧fourth axis

87‧‧‧Drive switching mechanism

88‧‧‧ Third drive sprocket

89‧‧‧third chain

90‧‧‧ Third driven sprocket

91‧‧‧ Planting drive shaft (fifth shaft)

92‧‧‧Overlay wheel

93‧‧‧Stabilization spring

94‧‧‧Soiler support frame

95‧‧‧Rotary axis for up and down adjustment

96‧‧‧Overburrk installation frame

97‧‧‧Overlay tool height adjustment operation tool

97a‧‧‧Operation handle

98‧‧‧Belt gear for height adjustment

99‧‧‧Dash and display label

100‧‧‧压地轮

101‧‧‧Compressed frame

101a‧‧‧ pivot shaft

101b‧‧‧ Telescopic adjustment

102‧‧‧Compressed cam

103‧‧‧Cam Roller

104‧‧‧Display label for the dial and the ground wheel

105‧‧‧Fixed hook

105a‧‧‧Axis

106‧‧‧Scraper support plate

107‧‧‧Scraper arm

107a‧‧‧ plate rotation pivot shaft

108‧‧‧Scraper

109‧‧‧Blasting device

110‧‧‧Scraper roller

111‧‧‧ Tension Roller

112‧‧‧Mill restraint

113‧‧‧ front and rear drive rollers

114‧‧‧First driven roller

115‧‧‧Second driven roller

116‧‧‧Guide bars

117‧‧‧ slot

118‧‧‧Auxiliary seedling accommodating department

119‧‧‧ spare seedlings support frame

120‧‧‧Receiving stop

121‧‧‧Shift lever guide

122‧‧‧ tilting rod

122a‧‧‧The Department of Control

123‧‧‧ Left and right tilting rod guides

124‧‧‧Solution tank

125‧‧‧ pump drive flange

125a‧‧‧ base flange

125b‧‧‧Flange for adjustment

126‧‧‧ pump (plunger pump)

127‧‧‧ pump cylinder rod

128‧‧‧Supply tube

129‧‧‧solution discharge

151‧‧‧ Position adjustment bolt

152‧‧‧Connected shaft bracket

153‧‧‧Protection position offset guide

154‧‧‧Clamping pressure adjustment member

155‧‧ ‧ spring mounting pin

156‧‧‧ reinforcing plate

157‧‧‧Metal bushing

166‧‧‧elastic spring

181‧‧‧ Timing take-out cam

182‧‧‧Time-out arm

183‧‧‧Slant distance shifting slide button

A‧‧‧ planting supply location

C‧‧‧Mill transport direction

F‧‧‧ joint

R‧‧‧ linkage mechanism

T‧‧‧ track

t‧‧‧Teng

T’‧‧‧ trajectory

V‧‧‧ longitudinal joint

Figure 1 is a side view of a seedling transplanter.

Figure 2 is a top view of the sensor.

Figure 3 is a top view of the seedling transplanter.

Fig. 4 is a front view showing that the front wheel rolling mechanism is easily understood.

Fig. 5 is a side view showing an ascending mechanism for easily understanding a hilling guide wheel.

Fig. 6 is a partial cross-sectional plan view showing a planting gearbox, a seedling planting device, and the like.

Fig. 7 is a partially omitted side view showing a planting gearbox, a seedling planting device and the like.

Fig. 8 is a plan view showing the seedling transplanting portion.

Figure 9 is a cross-sectional side view showing the seedling transplanting portion.

Fig. 10 is a plan view showing the mounting configuration of the seedling holding tool.

Figure 11 is an enlarged view showing the position-preventing guide of the seedling transplanting portion.

Fig. 12(A) is a side view showing the trajectory and trajectory of the bottom of the plant when the planting distance is maximum, and Fig. 12(B) shows the bottom of the ship when the planting distance is the smallest. A side view of the trajectory and trajectory of the planting method.

Fig. 13(A) is a side view showing the trajectory and the trajectory of the oblique planting when the planting distance is maximum, and Fig. 13(B) is a side view showing the trajectory and the trajectory of the oblique planting when the planting distance is the smallest.

Figure 14 is a side view showing the soil retaining wheel and the grounding wheel.

Figure 15 is a rear view showing the fixing hook.

Figure 16 is a plan view showing the soil wheel and the ground wheel.

Figure 17 is a partial cross-sectional rear view showing the soil wheel.

Fig. 18 is a rear view showing the seedling transporting portion.

Fig. 19 is a plan view showing the seedling holding tool on the left side.

Figure 20 is a side view showing the seedling holding tool on the left side.

One embodiment of the present invention will be described below. In addition, the following embodiments are merely one embodiment and are not intended to limit the scope of the patent application.

The seedling transplanting machine 1 for transplanting the potato seedlings includes a seedling transporting unit 5 for transporting the potato seedlings, and a seedling planting device 6 for transporting the seedling transporting unit 5 to the body including the traveling device 4 and the handlebar 2; Seedlings are planted in farmland. The traveling device 4 includes an engine 3; a pair of right and left rear wheels 7 are driven to rotate by power transmitted from the engine 3; and a pair of right and left front wheels 8 are rotatably supported by the rear wheel 7 In front.

At the rear of the engine 3, there is disposed a transmission case 9 having a housing portion extending from a left side portion thereof toward a left side of the engine 3, the case The body portion is coupled to the left side portion of the engine 3. A structure in which the output shaft of the engine 3 enters the casing portion and transmits power to the transmission mechanism in the transmission case 9. The transmission case 10 is rotatably mounted on the left and right side portions of the transmission case 9, and the front end of the wheel drive shaft extending from the transmission case 9 toward the left and right outer sides enters the rotation center of the transmission case 10 toward the transmission case 10. The transmission mechanism transmits the power for driving. Then, the power for traveling is transmitted to the rear axle 11 that extends toward the rear side of the body and protrudes toward the inner side of the rear end thereof via the transmission mechanism in the transmission case 10, whereby the rear wheel 7 is driven to rotate.

The arm 12 extending upward is integrally attached to the mounting portion of the right and left transmission case 10 toward the transmission case 9, and the right and left arms 12 and the right and left sides of the balance bar 14 are coupled via a connecting portion. The rod 14 is rotatably attached to the tip end of the piston rod of the lift hydraulic cylinder 13 fixed to the transmission case 9 around the vertical axis. The connection portion on the right side is constituted by a rod, and the connection portion on the left side is constituted by a retractable left and right horizontal control hydraulic cylinder 16.

When the hydraulic cylinder 13 for raising and lowering is actuated and the piston rod protrudes toward the rear of the body, the left and right arms 12 are rotated rearward, and accordingly, the transmission case 10 is rotated downward, and the body is raised. On the other hand, when the piston rod of the hydraulic cylinder 13 for raising and lowering is fed toward the front of the machine body, the left and right arms 12 are rotated forward, and accordingly, the transmission case 10 is rotated upward, and the body is lowered. The lifting hydraulic cylinder 13 is configured to detect the height of the body relative to the upper surface of the soil according to the detection result of the sensor 17 for detecting the height of the upper surface of the soil of the body. It is configured such that the degree reaches the set height, and it can also be configured by the human operation of the planting lifting rod 18 disposed near the handlebar 2 to move the body up or down. Further, the planting lifting rod 18 is capable of performing an on/off operation of driving the seedling planting device 6 and the seedling conveying device 5. Further, a main clutch lever 19 for operating the on/off operation of the travel device 4 to operate the main clutch in the transmission case 9 is provided on the side of the planting lifter 18.

The sensor 17 is configured to detect the height of the farmland surface by contacting the plate-shaped main ground portion 17a having a large left-right width and a rod-shaped sub-ground portion 17b having a small left-right width extending from the main ground portion 17a toward the rear side. And the main grounding portion 17a and the sub-grounding portion 17b are integrally rotated up and down to detect the height of the farmland surface. The main ground portion 17a is disposed on the front side of the seedling conveyance unit 5, and the sub-ground portion 17b is disposed at the left and right center positions of the main ground portion 17a and at a position shifted to the left and right sides (left side) of the plant supply position A and The position of the lower portion of the ascending transport portion 5c of the seedling transport portion 5 when viewed from the side of the body.

Further, when the left and right horizontal control hydraulic cylinders 16 perform the expansion and contraction operation, the left transmission case 10 is rotated up and down to move the left rear wheel 7 up and down, and the body is tilted to the left and right. The left and right horizontal control hydraulic cylinders 16 are configured to move the body to the left and right levels in accordance with the detection result of the left and right tilt sensors for detecting the pendulum tilted to the left and right horizontally.

The left and right front wheels 8 are rotatably attached to the front axle 22, and the front axle 22 is fixed to a lower end portion of the arm portion 21 extending downward from the left and right side portions of the front wheel support frame 20, and the front wheel support frame 20 is wound around The axis in the front-rear direction is rotatably mounted at the left and right center positions below the engine 3. Therefore, the left and right front wheels 8 are free to roll around the axis of the front and rear directions of the left and right centers of the body. Further, the rolling restriction tool 60, which is a restriction pin that can restrict the rolling rotation of the front wheel support frame 20, is inserted into the hole of the frame portion provided on the body side and the front wheel support frame 20, whereby the body can be used as a reference without the left and right heights. The front wheel support frame 20 is fixed in a poor state, and the soiling and straightness of the farmland having a stepped inclination or on the left and right sides can be improved. When the general front wheel support frame 20 is rolled, the scroll restricting tool 60 is inserted into the spare hole on the side of the front wheel support frame 20 only.

On the front side of the front wheel support frame 20, a soil guiding support shaft 62 that extends in the left-right direction from the front wheel support frame 20 via the soil guiding support plate 61 is rotatably supported. The left and right soil guiding wheels 64 are supported via the left and right soil guiding support frames 63 extending forward from the soil guiding support shaft 62. The soil guide wheel 64 is an idling wheel, and is configured to be in contact with the side surface of the soil and to guide the body to the soil. A interlocking cable 65 is connected between the piston rod of the hydraulic cylinder 13 for lifting and the soil guiding support shaft 62. Further, the piston rod and the interlocking cable 65 are elasticized by a compression type flexible spring 166 or the like. The mechanism is connected to prevent breakage of the interlocking cable 65 or the like due to a keyless lining (mecha-lock) or the like. When the left and right rear wheels 7 are moved downward to raise the body toward the most ascending position, the piston rod of the lift hydraulic cylinder 13 moves toward the rear side, and the interlocking cable 65 is pulled and interlocked to cause the soil guide. The lead support shaft 62 rotates and the left and right soil guiding support frames 63 move upward, so that the left and right soil guiding wheels 64 rise on the basis of the body.

The steering handle 2 is attached to the rear end portion of the handle frame 23 to which the front end portion is fixed to the transmission case 9. The handle frame 23 is disposed at a position shifted to the right from the left and right centers of the body, and extends rearward and extends obliquely rearward and upward from the front and rear intermediate portions. The handlebars 2 are extended from the rear end portion of the handle frame 23 toward the left and right and rearward, and the rear end portions thereof are used as the grip portions 2a and 2a of the handlebar 2. The left and right handle portions 2a, 2a of the handlebar 2 are set at an appropriate height so that the operator can easily hold the handle portions 2a, 2a by hand. Further, in the illustrated example, the handle portions 2a and 2a are divided into right and left. However, the right and left rear end portions of the handlebar 2 may be coupled to each other to the left and right, and the connected portion may be a handle portion.

The seedling planting device 6 is composed of a member having a seedling transplanting unit 31 and a mechanism for opening and closing the seedling holding tool 31, and a link mechanism R for actuating the seedling transplanting portion. The driving portion of the link mechanism R that drives the seedling planting device 6 is provided with a planting gearbox 32 of the internal gear transmission mechanism, and the transmission mechanism receives the link mechanism R from the gearbox body 9. Drive power and drive. The planting transmission case 32 has a first casing portion 32a whose front portion is coupled to the rear portion of the transmission case 9 and extends obliquely upward rearward, and a second casing portion 32b is fixed to the upper portion of the first casing portion 32a. The left side portion extends to the left side; and the third case portion 32c is fixed to the left end portion of the second case portion 32b and extends obliquely downward rearward.

The input shaft 67 in the front-rear direction is for driving the power from the transmission case 9 into the first casing portion 32a. The transmission mechanism in the first housing portion 32a is described. The transmission mechanism is configured to be driven from the input shaft 67 via a pair of bevel gears 68 toward the first axis 70 in the left-right direction, and then from the first shaft 70. The first drive sprocket 71, the first chain 72 and the first driven sprocket 73 are driven toward the second shaft 69, and then from the second shaft 69 via the second drive sprocket 74, the second chain 75 and the second driven The sprocket 76 is driven toward the planting clutch 78 on the planting clutch shaft (third shaft) 77 as a drive shaft. The planting clutch 78 is a conventional positioning stop clutch for disconnecting the transmission at a predetermined phase, and the predetermined phase (position) of the seedling planting device 6 before the seedlings taken out after the clamping is stopped. If the planting clutch 78 is in the transmission state, the planting clutch 78 rotates integrally with the planting clutch shaft 77. On the other hand, the timing take-out cam 181 is driven to rotate from the second shaft 69 via the equal-speed gear pair (three sets) of equal speed gears having different gear ratios, and the timing take-out cam 181 and the timing take-out arm are extracted by the timing. When the 182 contact is made, the timing take-out arm 182 is rotated, and the timing removal arm 182 is released from the restriction on the non-transmission position of the planting clutch 78, and the planting clutch 78 is rotated in one rotation. If the planting clutch 78 is rotated one turn, then It is again restricted by the timing take-out arm 182 to be in a non-transmission state. The plant-to-speed shifting mechanism 80 selectively selects one of the complex array (three sets) of the constant-speed gear pairs by the plant-to-speed shifting slide key 183, and drives the timing take-out cam 181 by the drive of the selected constant-speed gear pair. Therefore, the driving speed of the timing take-out cam 181 is switched by the selection of the constant speed gear pair having different gear ratios, and the planting pitch is switched by switching the timing at which the seeding clutch 78 is in the transmission state.

The planting clutch shaft 77 extends from the inside of the first housing portion 32a through the second housing portion 32b into the third housing portion 32c. The transmission mechanism in the third housing portion 32c will be described as being driven from the planting clutch shaft 77 to the fourth shaft 86 via a pair of constant speed transmission gears 84 or a pair of unequal speed transmission gears 85 as eccentric gears. Further, a drive switching mechanism 87 for selectively switching the gears for transmission to a pair of constant speed transmission gears 84 or a pair of non-equal speed transmission gears 85 is provided on the fourth shaft 86 in a pair of constant speed transmissions. The gear 84 is formed by a switching clutch between the pair of non-equal speed transmission gears 85. Therefore, the transmission switching mechanism 87 is configured to be switched to the constant-speed transmission state of the constant-speed transmission on the transmission path of the seed-growing apparatus 6, and the unequal-speed transmission state of the transmission by the unequal speed. Then, the fourth shaft 86 is driven to the planting drive shaft (fifth shaft) 91 via the third drive sprocket 88, the third chain 89, and the third driven sprocket 90, and then the seeding device is driven by the planting drive shaft 91. The drive arm 34, which will be described later, of the link mechanism R of 6 drives the structure of the seedling planting device 6.

Further, the third casing portion 32c is provided to be rotatable in the vertical direction around the planting clutch shaft 77 as the input shaft of the third casing portion 32c, and the seedling planting device 6 and the seedling conveying portion 5 are arranged to travel. The device 4 is rotatable up and down together with the third housing portion 32c as a reference.

A support frame 38 fixed to the third casing portion 32c and extending rearward is provided, and the link mechanism R of the seedling planting device 6 is constituted by the drive arm 34, the support link portion 36, and the swing link 37, and the drive The arm 34 is driven to rotate by a drive from a third housing portion 32c, and the front end portion of the support link portion 36 is coupled to the drive arm 34, and the swing link 37 is coupled to the rear end portion of the support link portion 36. With the support frame 38. Viewed from the left side of the body, the drive arm 34 rotates to the right. The seedling transplanting portion supported by the support link portion 36 operates, and the seedling planting gripping tool 31 at the front end portion (rear end portion) of the seedling transplanting portion enters the soil from substantially above, and faces downward in the soil. Moving to the rear side and moving to the lower dead center position, the upper side of the trajectory moving toward the rear side passes through the vicinity of the trajectory, and moves toward the front side while moving toward the front side to perform the exit from the soil. The action is exited to move in a manner that depicts a longer trajectory T before and after. Further, the trajectory T is a motion trajectory (static trajectory) of the seedling holding tool 31 with respect to the body, and the trajectory of the seedling gripping tool 31 with respect to the farmland when the body is traveling forward is the trajectory T'.

The seedling transplanting portion that moves integrally with the support link portion 36 is composed of a pair of gripping tools 41, a pair of seedling holding tools 31, and bearings. 42b, the pair of gripper tools 41 are coupled to the connecting shaft 40 supported by the support link portion 36, and the pair of seedling holding tools 31 are fixed to the front end portion of the gripping tool 41. The seedlings 42b are disposed on the opposite side of the gripping tool 41 from the seedling holding tool 31. When the projection 43a provided on the side surface of the opening and closing cam 43 comes into contact with the bearing 42b, the mutual spacing between the pair of seedling holding tools 31 becomes large. That is, the pair of gripper tools 41 are rotated around the joint shaft 40, so that the interval between the pair of seedling holding tools 31 becomes large. Therefore, the seedlings holding tool 31 is held by the opening and closing cams 43 to hold the seedlings, or the clamping is released. Further, a tension spring 44 is provided between the pair of gripper tools 41, and the pair of seedling holding tools 31 are biased in a direction in which they approach each other by the tension spring 44. Further, a dimple is provided on the opposing surface of the seedling-carrying gripping tool 31 to easily hold the seedling.

The opening and closing cam 43 is fixed to the front end side of the drive arm 34, and rotates integrally with the drive arm 34. Therefore, when the opening/closing cam 43 is rotated, the projection 43a of the opening and closing cam 43 comes into contact with the bearing 42b in the vicinity of the bottom dead center of the planting trajectory T (moving trajectory T'), and the front end of the pair of seedling holding tools 31 is held. When the seedling holding tool 31 reaches the planting supply position A, the bearing 42b passes over the projection 43a, and is biased by the tension spring 44 between the pair of gripper tools 41. Therefore, the tip end portion is moved in the closing direction, and the lower end portion of the vine of the potato seedling at the planting supply position A is sandwiched (in the planting supply position A, the potato seedlings are oriented in the front-rear direction, and therefore at the rear end portion thereof). Next, the seedling holding tool 31 is tied to the seedling In the state in which the tool 31 holds the seedling, the seedling is buried in the soil near the bottom dead center of the planting trajectory T (planting trajectory T') by the rotation of the driving arm 34, and the front end thereof is moved backward. In the same manner, the front and rear postures are tilted while tilting forward, and the projection 43a of the cam 43 comes into contact with the bearing 42b again in the vicinity of the bottom dead center, and the front end portion of the pair of seedling holding tools 31 is opened, and the clip is lowered. The seedlings are transplanted in the soil.

Further, by changing the attachment phase of the opening and closing cam 43 in the drive arm 34, the timing of the clamping of the seedling holding tool 31 to open the seedling can be changed. Therefore, the length of the vine inserted into the soil by the seedling type holding tool 31 can be appropriately adjusted while confirming the planting state, and the planting accuracy can be improved. By changing the attachment phase of the opening and closing cam 43, the timing at which the seedling holding tool 31 holds the seedlings can be changed, but it is set to a timing that does not hinder the clamping of the seedlings at the planting supply position A. In addition, it is also possible to switch between the opening and closing cams 43 and the projections 43a, and the timing of clamping the seedlings by the seedlings holding tool 31 is not changed, and only the timing of the opening of the seedlings holding tool 31 is changed.

In addition, the seedling delivery unit 5, which is described later, supplies the potato seedlings to the planting supply position A in the posture in the front-rear direction. Therefore, the seedling planting device 6 transplants the potato seedlings in the soil in a posture in the front-rear direction to the soil surface. The vines of the sweet potato seedlings are transplanted in a tilted posture. Since the seedling planting device 6 is actuated and planted on the planting trajectory T extending rearward and downward, the seedlings are planted in a state of being inclined toward the front side. So, if the seedling's planting posture is tilted forward When the size of the seedlings is large, the roots of the seedlings are easily extended, and the number of cultivated sweet potatoes is increased, and it is suitable for cultivation of sweet potatoes such as cultivation and processing. The case of multiple sweet potatoes.

The pair of seedling type holding tools 31 which are opened in the vicinity of the bottom dead center of the planting trajectory T (moving trajectory T') and are detached from the seedlings are moved toward the front side while being tilted further toward the front tilting side, and the movement is performed. In the middle of the process, the side is tilted to the front side, and the front and rear tilting postures are moved, and the withdrawal operation is performed to pull out from the soil while moving forward. Therefore, the entry trajectory of the seedling holding tool 31 into the soil is close to the exit trajectory exiting from the soil, so that the planting hole of the farmland is not excessively enlarged and the seedling is appropriately planted.

The trajectory T (moving trajectory T') shown in the figure is a trajectory when the transmission of the seedling planting device 6 is switched to the constant velocity transmission state by the transmission switching mechanism 87. When the drive switching mechanism 87 is switched to the non-equal speed transmission state, the drive arm 34 rotates at a constant speed, and the speed on the trajectory T when moving toward the rear side of the bottom dead center position in the soil is slightly faster. The insertion length in the Miao Chao soil becomes longer.

The circle mark on the track T (moving track T') shown in the figure shows the position every 15 degrees of the rotational phase of the drive arm 34. In addition, in the illustration, when the plant spacing is set to the minimum and the maximum is set, regardless of the change of the plant spacing, the trajectory T as the static trajectory is the same, and the plant spacing is changed. The changer is the moving track T'. As can be seen from the legend, in the case of the bottom plating method, the operating speed of the front end of the seedling holding tool 31 is more than that when moving toward the front side in the soil toward the lower dead center position when moving toward the front side beyond the bottom dead center position. fast. Thereby, the amount of movement moving toward the rear side toward the bottom dead center position in the soil can be increased, and the bottom plating method can be performed.

When the swing link 37 is switched to the position of the rear lower side of the joint fulcrum of the support frame 38, the trajectory T (moving track T') has a tendency to rise slightly (the upper and lower amplitudes become larger, and the front and rear amplitudes in the soil become smaller. .), it becomes a diagonal plant in a tilted planting state. Compared with the bottom of the ship, the number of sweet potatoes after cultivation is reduced, but the size of each sweet potato is increased, and it is suitable for the cultivation of sweet potatoes which are generally eaten.

A soil-receiving wheel 92 that is a pair of left and right earth-covering tools is provided behind the seedling planting device 6. The soil-receiving wheel 92 is an idling wheel, and is provided from the rear end portion of the support frame 38 via the soil-carrying wheel support frame 94, and is in contact with the soil surface, and the soil on the left and right sides of the planted seedling is covered with the seedlings and pressed. Therefore, the seedling planting device 6 and the seedling conveying portion that rotate the planting clutch shaft 77 that serves as the input shaft around the third casing portion 32c of the planting gearbox 32 are supported by the grounding of the pair of right and left soil retaining wheels 92. 5. The seedling planting device 6 and the seedling transporting unit 5 are swung in accordance with the unevenness of the farmland surface and maintained at a predetermined height with respect to the farmland surface. Between the support frame 38 and the handle frame 23, a stabilizer spring 93 for stabilizing the vertical swing of the seedling planting device 6 and the seedling transporting unit 5 is provided, and the seedling plant is suspended by the stabilizing spring 93. The structure of the device 6 and the seedling transport unit 5. Further, the seedling planting device 6 and the seedling conveying portion 5 may be fixed so as not to swing up and down. Therefore, the weight of the seedling planting device 6 and the seedling transporting unit 5 acts on the soil retaining wheel 92, so that the soil compacting wheel 92 can be used to obtain a sufficient pressing force. Further, the cover wheel support frame 94 is a cylindrical frame extending in the vertical direction, and the upper and lower vertical adjustment rotary shafts 95 are provided inside the cover wheel support frame 94, and external threads are formed on the outer peripheral surface; The side cover wheel mounting frame 96 is formed with internal threads. The top of the cover wheel mounting frame 96 is a structure that can slide up and down on the cover wheel support frame 94 but does not rotate due to the structure of the angle axis, and the lower branch is two-pronged, and the left and right double fork portions of the branch The left and right soil cover wheels 92 are rotatably mounted. Then, the up-and-down adjustment rotary shaft 95 is rotated by the height adjustment bevel gear 98 by the rotation operation of the cover tool height adjustment operation tool 97 as a rotary handle placed at the height of the upper end of the vertical adjustment rotary shaft 95. . Therefore, the up-and-down adjustment rotary shaft 95 rotates and the blanket wheel mounting frame 96 moves up and down to adjust the height of the soil cover wheel 92 by the operation of the soil-covering tool height adjustment operation tool 97. Further, on the upper portion of the cover wheel mounting frame 96, a dial and a display label 99 as a reference for the height position of the blanket wheel 92 are provided. The earth-covering tool height adjustment operation tool 97 is inclined toward the right side of the right and left sides of the handlebar 2 and extends rearward, that is, right obliquely rearward, and the operation handle 97a of the soil-covering tool height adjustment operation tool 97 is disposed when the plane is viewed from the plane. Between the left and right handle portions 2a of the handlebar 2 is manipulated, and the lower or lower portion of the handlebar 2 is manipulated. Further, a soil-covering wheel 92 is disposed above the planting trajectory T of the seedling planting device 6, and the soil-covering wheel 92 and the seedling after planting The positional relationship is close to each other and becomes in close contact, so that the pressing of the earth-covering wheel 92 can be appropriately maintained, and a good pressing effect can be obtained.

A grounding wheel 100 as a grounding tool is provided between the left and right soil-receiving wheels 92, and the ground-rolling wheel 100 moves downward to press the soil above the seedlings after planting. The diameter of the grounding wheel 100 is smaller than that of the soil-receiving wheel 92, and is accommodated in the left and right soil-receiving wheels 92 when viewed from the side of the machine body in a pressed state of moving downward, and is disposed at the rotation axis of the soil-receiving wheel 92. The position at which the reference is offset toward the back side. The grounding wheel 100 is provided on a pressing frame 101 that is vertically rotated about a fulcrum shaft 101a provided on the support frame 38, and is provided with a cam roller 103 disposed on the front side with respect to the fulcrum shaft 101a, and is pressed The frame 101 is in contact with the pressing cam 102 that is integrally rotated with the driving arm 34 from the lower side by the cam roller 103, and the pressure of the cam roller 103 is changed while restricting the rotation of the downward moving side by the driving of the pressing cam 102. The diameter of the cam 102 is used to move up and down. Therefore, the weight of the grounding wheel 100 and the pressing frame 101 itself acts as a pressing force on the farmland. With the ground wheel 100, the soil directly above the seedling can be pressed after planting the seedling. Further, by the pressing action of the grounding wheel 100, the seedlings on the ground are corrected upward, thereby preventing the seedlings from coming into contact with the mulching film laid on the farmland surface and causing damage due to the heat of the cover film. Moreover, the pressure-reduction frame 101 is provided with the expansion-contraction adjustment part 101b which expands and expands back and front by the double frame structure, and the front-back position of the press-ground wheel 100 can be adjusted by the expansion-contraction of the expansion-contraction adjustment part 101b. Further, the telescopic adjustment portion 101b is provided with a scale for the ground wheel as a reference for the front and rear positions of the ground wheel 100. The display label 104 is used for the disk and the ground wheel. Further, the support frame 38 is provided with a fixing hook 105 as a fixing tool, and the fixing hook 105 is fixed to the upward moving position without moving the pressing frame 101 up and down. The fixing hook 105 is disposed to be vertically rotatable about the shaft 105a in the front-rear direction, and when the pressing wheel 100 is actuated, the fixing hook 105 is rotated toward the oblique upper right side and is located on the right side from the pressed ground frame 101. The up-and-down rotation area of the floor frame 101 is separated from the position, and the floor frame 101 is vertically rotatable by the pressing cam 102. On the other hand, when the grounding wheel 100 is not actuated, the fixing hook 105 is rotated downward to suspend the pressing frame 101 on the fixing hook 105, and the cam roller 103 does not contact the rotating pressing cam 102, The grounding wheel 100 is fixed at a position away from the ground upward.

Further, a squeegee supporting plate 106 is fixed to the lower side of the support frame 38, and a lower end portion of the squeegee arm 107 that rotates around the squeegee pivot shaft 107a provided on the squeegee supporting plate 106 is provided. The squeegee 108 is composed of a rubber plate belonging to an elastic body. The squeegee 108 is provided with a notch portion that enters from the front side at the left and right portions, and the left and right nipple holding tools 31 are inserted into the right and left notch portions, thereby removing the left and right sides of the seedling type holding tool 31 attached to the left and right sides. The soil on both sides of the left and right. A biasing device 109 belonging to the tension spring is disposed between the upper portion of the upper side of the squeezing pivot shaft 107a of the squeegee arm 107 and the squeegee supporting plate 106 at the rear side thereof, and the squeegee is provided by the squeezing device 109. 108 is applied to the front side. On the other hand, the oscillating link 37 is provided with a squeegee actuating roller 110, and the seedling holding tool 31 enters the soil and faces the trajectory T (moving trajectory T'). When the dead center position moves toward the rear side, the squeegee actuating roller 110 contacts the lower portion of the squeegee arm 107 from the front side, and moves the lower portion of the squeegee arm 107 toward the rear side, thereby forcibly squeezing the squeegee 108 from the trajectory T. (moving track T') is retracted toward the side to be separated. Next, during the withdrawal movement in which the seedling-clamping tool 31 is withdrawn from the soil and moved toward the front side, the blade actuation roller 110 moves toward the front side to exit from the lower portion of the blade arm 107, and is applied by the biasing device 109. The force, the lower portion of the squeegee arm 107 moves toward the front side, and moves the squeegee 108 on the trajectory T of the front side. Thereby, the squeegee 108 is configured to be forcibly retracted from the trajectory T toward the exiting side when the seedling planting gripping tool 31 is planted in the soil, and is biased by the squeezing device 109 during the aforementioned withdrawal movement. The force moves on the trajectory T, and the squeezing device 109 urges the squeegee 108 toward the side (front side) where the seedling holding tool 31 is withdrawn and moved.

The seedling planting device 6 is described in detail. The seedling planting device 6 has a pair of seedling seed holding tools 31 for gripping rattan seedlings, and a pair of gripping tools 41 for holding the seedlings. The tool 31 is connected and opens and closes a pair of seedling holding tools 31. Next, the seedling holding tool 31 and the gripping tool 41 are coupled to each other by the longitudinal joint surface V. The vertical joint surface V is a substantially vertical surface parallel to the trajectory T (moving trajectory T') of the seedling holding tool 31. According to the above configuration, the mounting angle of the upper and lower sides of the seedling-carrying gripping tool 31 and the adjustment of the planting depth can be easily performed. Further, among the two bolt holes provided in the joint base portion of the seedling type holding tool 31, the hole near the tip end of the seedling type holding tool 31 is a long hole. According to the above configuration, the adjustment range of the claw portion of the tip end of the seedling holding tool 31 can be increased.

Moreover, the joint base portion of the seedling type holding tool 31 has an L-shaped structure, and is provided on one side of the L-shaped structure and on the surface perpendicular to the vertical joint surface V above the gripping tool 41. The position adjusting bolt 151 for adjusting the position of the seedling holding tool 31 is carried out along the vertical joint surface V. According to the above configuration, it is easy to finely adjust the mounting angle of the seedling holding tool 31 and the planting depth. Further, although the position adjusting bolt 151 is disposed above the gripping tool 41, the position adjusting bolt 151 may be configured to be below or to the side of the gripping tool 41.

Further, the seedling-type gripping tool 31 is configured to be attached to the vertical joint surface V on the inner side of the two gripper tools 41, and a gripping pressure adjusting member 154 such as a gasket is interposed therebetween to adjust the seedling planting species. The clamping pressure of the gripping tool 31. According to the above configuration, the entire seedling transplanting portion can be miniaturized, and the fine adjustment of the nip pressure can be performed. In the above, a spacer is used as the nip adjustment member 154, but a member having a constant thickness such as a spacer may be used.

Two spring mounting pins 155 for supporting the tension springs 44 are disposed above the gripping tool 41, and a tension spring 44 is placed on the opposing gripper tool 41 to apply a clamping force. Next, the position adjusting bolt 151 is provided at a position to avoid the two spring mounting pins 155 in plan view. In the above, although the position adjusting bolt 151 is provided at the center of the two spring mounting pins 155, it may be provided closer to the front end of the seeding holding tool 31 than the two spring mounting pins 155.

The gripping tool 41 is constituted by a joint base 41a and a pillar portion 41b which are combined with the seedling holding tool 31. The pillar portion 41b is joined to the joint base portion 41a by welding one end portion thereof. Moreover, the joint base portion 41a corresponding to the left and right seedling seed holding tools 31 and the right and left joint portions F of the pillar portion 41b are configured to be displaced from each other in the vertical direction. The connecting shaft 40 that serves as the fulcrum of the opening and closing operation of the gripper tool 41 is located substantially at the center in the longitudinal direction of the pillar portion 41b, and the pair of gripper tools 41 are rotatably coupled around the connecting shaft 40. In addition, a grease-filled bearing 42b is provided at the other end of the pillar portion 41b, and the outer circumference of the bearing 42b is in contact with the opening and closing cam 43, and the distance between the bearings 42b is increased by the projection of the opening and closing cam 43. It becomes larger by 43a, thereby increasing the interval of the seedling holding tool 31. As described above, the joint portions F can be vertically overlapped in the connecting shaft 40 by vertically displacing the joint portions F in the vertical direction. That is, the holding tool 41 is made to have a simpler configuration, whereby cost reduction and the like can be achieved.

The connecting shaft 40 is fixed by a connecting shaft bracket 152 that is coupled to the support link portion 36. The support link portion 36 constitutes the link mechanism R, and the seedling holding tool 31 generates a seedling planting operation. In addition to this, at a position adjacent to the connection shaft bracket 152 of the support link portion 36, a position-preventing prevention guide 153 that restricts the vertical movement of the gripper tool 41 is provided. By sandwiching the stay portion 41b of the gripper tool 41 at a position shifted from each other in the vertical direction, the vertical movement of the pillar portion 41b is restricted. Structure There is a gap between the pillar portions 41b in the upper and lower sides. According to the configuration described above, the positional deviation of the seedling holding tool 31 coupled to the front end of the gripping tool 41 can be prevented. Further, the reinforcing plate 156 is provided at the position preventing guide 153, and is detachably configured to ensure maintenance. Further, a metal bush 157 that is aligned with the two pillar portions is provided between the connecting shaft 40 fixed to the connecting shaft bracket 152 and the pillar portion 41b.

The seedling conveyance unit 5 is composed of a seedling conveyance belt, and the seedling conveyance belt includes an upper lateral conveyance unit 5a, and a plurality of the seedling storage units are provided in the seedling conveyance direction C in a posture in which the vines are placed in the front-rear direction. The seedling container 26 conveys the seedling container 26 in the right direction on the upper side of the body; the descending transport unit 5b transports the seedling container 26 conveyed by the upper lateral transport unit 5a toward the lower side of the body; and the ascending transport unit 5c The seedling container 26 conveyed by the descending conveyance unit 5b is conveyed toward the upper side of the machine body and returned to the conveyance start end side of the upper lateral conveyance unit 5a; and the seedling storage body is conveyed along a single loop-shaped conveyance path. 26. Further, the upper lateral conveying portion 5a is configured to protrude further toward the left side than the front wheel 8 and the rear wheel 7 on the left side, and the left end is the outermost end on the left side of the body. In addition, a tension roller 111 that deflects the seedling conveyance belt inward in the left-right direction is provided in the intermediate portion of the ascending transport portion 5c, whereby the ascending transport portion 5c does not interfere with the rear wheel 7 on the left side. Further, the rear end of the upper lateral conveying portion 5a is disposed at a position closer to the rear side than the front wheel 8 and the rear wheel 7 on the left side. Therefore, the operator is laterally displaced to the rear side of the rear left wheel 7 and the upper lateral conveying portion 5a on the left side. The delivery unit 5a supplies seedlings. The transport path is inclined such that the upper lateral transport unit 5a is located on the rear side when viewed from the side, and the seed transport body 26 of the upper lateral transport unit 5a is disposed in the vicinity of the operator on the rear side of the seedling transport unit 5 so that It is easy for the operator to perform the seedling supply operation of the seedling storage body 26 of the upper lateral conveying portion 5a. In addition, the seedling planting device 6 is planted in the farmland by the seedling storage unit 26 which is transported by the planting supply position A of the lowermost position of the transport path of the seedling transport unit 5 by the descending transport unit 5b. Further, a seedling drop preventing plate 45 supported by the supporting member 46 is provided at an upper portion of the descending conveying portion 5b, and the seedling fall preventing plate 45 guides the seedlings into the seedling receiving portion 26 without dropping the seedlings. .

A seedling restricting rod 112 in the left-right direction is provided above the upper lateral conveying portion 5a. Therefore, the operator places only the vine of the seedling on the upper side of the seedling regulating rod 112 in the upper lateral conveying unit 5a, and the lower side of the vine which is curved on the same side as the vine bending when the curved side of the vine is lower. In a state of being bent downward, the seedlings can be supplied to the seedling container 26 in a desired state to be described later.

Moreover, the rear end portion of the surface (outer peripheral surface) of the seedling container 26 is provided with a jig 49 as a seedling holding tool, and the rear end portion of the rattan is sandwiched and held. The jig 49 is composed of a pair of left and right holders that protrude upward from the support plate portion 47 of the seedling conveyance belt. Further, the pair of right and left gripping systems are composed of a sponge-like resin having elasticity, and the other is composed of a flexible brush so as not to damage the rattan of the seedling. The operator presses the seedlings down In this way, the seedlings are held by a pair of left and right clamping bodies.

The seedling conveyance belt is wound around the front and rear driving rollers 113 provided on the upper right side, the left and right first driven rollers 114 provided on the lower portion, and the second driven roller 115 disposed on the upper left side, by the driving roller 113 Drive and rotate. In addition, between the right and left first driven rollers 114, the seedling transfer belt conveys the seedlings in the horizontal direction in the left and right directions. However, in the transporting portion, the seeding planting device 6 is provided with the planting supply position A in which the seedlings are gripped and taken out. On the other hand, the back surface (inner peripheral surface) of the seedling conveyance belt is formed to protrude in the rotation direction of the seedling conveyance belt at a position rearward of the center in the width direction (front-rear direction) of the seedling conveyance belt. A guide strip 116 belonging to the ridge. A groove 117 is formed at a position of the first driven roller 114 and the second driven roller 115 corresponding to the guide strip 116, and the position of the front and rear direction of the seedling conveyance belt is prevented by the engagement of the guide strip 116 with the groove 117. shift. Further, in the above, although the guide strip 116 is a ridge, the guide strip 116 may be a groove, and the first driven roller 114 and the second driven roller 115 may be configured as the aforementioned groove. The guiding strip engages the protruding portion.

The upper end of the interlocking lever 66 whose lower end is coupled to the swing link 37 is coupled to a one-way clutch provided on the drive shaft portion of the front and rear drive rollers 113. Therefore, when the swing link 37 swings during the operation of the seedling planting device 6, the interlocking lever 66 reciprocates up and down, and the front and rear drive rollers 113 intermittently drive the seedling conveyance belt to move toward the seedling conveyance direction via the one-way clutch. The intermittent driving system of the seedling conveying belt is configured to hold the seedlings of the seedling planting device 6 The tool 31 is stopped when the seedling is held, and is driven in other cases. Therefore, since the seedling container 26 is stopped when the seedling planting tool 31 of the seedling planting device 6 is lowered and planted in the soil, the seedling body 26 can be smoothly taken out from the seedling receiving body 26 and the seedlings can be appropriately planted. In the farmland.

On the front side of the seedling transport unit 5, a seedling stage 82 is provided from the first casing portion 32a of the planting transmission case 32 via the seedling table support frame 81. The potato seedlings are placed on the seedling table 82 in a state of being housed in a storage box or the like, and the operator supplies the seedlings on the seedling table 82 to the upper lateral conveying portion 5a of the seedling conveying portion 5. The rear end portion of the seedling loading table 82 is disposed close to the front end portion of the upper lateral conveying portion 5a, and the simplification of replenishing the seedling toward the upper lateral conveying portion 5a is sought.

Further, a cage-shaped reserve seedling accommodating portion 118 for accommodating spare seedlings is provided on the left side of the upper lateral conveying portion 5a. The spare seedling accommodating portion 118 is supported by a front and rear spare seedling receiving portion support frame 119 rotatable around the center of the second driven roller 115. When the spare seedling accommodating portion support frame 119 is rotated toward the inner side (right side) of the body in the left-right direction, and the spare seedling accommodating portion 118 is moved toward the storage position located above the upper lateral conveying portion 5a, the width of the body can be reduced. The spare seedling accommodating portion 118 passes over the dead point by the rotation to the right side, and the spare seedling accommodating portion support frame 119 is held in contact with the storage stopper portion 120 provided on the body and held at the storage position. Even in this storage position, the seedling storage unit 118 does not interfere with the seedling conveyance belt or the jig 49 of the seedling conveyance unit 5, and can drive the seedling conveyance unit 5.

A shift lever 83 as an operating lever is provided extending from the position of the transmission body 9 toward the rear side, and the shift lever 83 is capable of switching the transmission mechanism in the transmission body 9 and performing a step-variable shifting operation on the traveling speed of the traveling device 4. . The shift lever 83 extends from the traveling device 4 to the rear side of the seedling transport unit 5 through the space surrounded by the upper lateral transport unit 5a, the descending transport unit 5b, and the ascending transport unit 5c of the seedling transport unit 5. That is, the shift lever 83 passes through a predetermined loop-shaped transport path of the seedling transport unit 5. The grip portion 83a of the shift lever 83 protrudes toward the rear side of the seedling transport portion 5, but the shift lever guide 121 that supports the shift lever 83 and marks the shift position of the lever support member is disposed by the upper lateral transport portion 5a and the descending transport portion 5b. And a space surrounded by the ascending transport unit 5c. Therefore, the shift lever 83 and the shift lever guide 121 are disposed as far as possible on the front side while maintaining the operability of the shift lever 83. In addition, the shift lever guide 121 is supported by the third casing portion 32c of the planting transmission case 32, and swings up and down around the planting clutch shaft 77 in the left-right direction together with the seedling conveying unit 5 and the seedling planting device 6. Next, a distal end portion of the shift lever 83 (a portion behind the transmission case 9 on the front side of the seedling transport portion 5) is provided with a telescopic portion that can expand and contract in the rod axis direction, and the elasticity of the telescopic portion is utilized. The up-and-down swing of the shift lever 83 is allowed, so that the shift lever guide 121 and the indication portion on the shift lever 83 side are not excessively separated.

Further, a left and right tilting lever 122 as an operating lever is provided extending from the portion of the transmission body 9 toward the rear side, and the left and right tilting levers 122 are configured to switch the hydraulic valves for scrolling provided in the portion of the transmission body 9 to control the hydraulic pressure for the right and left horizontal control. The cylinder 16 is forcibly activated. The left and right tilting levers 122 are extended from the traveling device 4 The space is surrounded by the upper lateral conveying unit 5a, the descending conveying unit 5b, and the rising conveying unit 5c of the seedling conveying unit 5. The grip portion 122a and the right and left tilt rod guides 123 of the right and left tilt levers 122 are disposed in a space surrounded by the upper lateral transport portion 5a, the descending transport portion 5b, and the ascending transport portion 5c. Therefore, the left and right tilting levers 122 are arranged as far as possible on the front side. Further, since the operating frequency of the right and left tilting levers 122 is lower than that of the shifting lever 83, even if the left and right tilting levers 122 are disposed in the space, the operability is not hindered. Further, the right and left tilting levers 122 are rods that are temporarily operated to the left and right and are released to return to the neutral position. Since there is no indicating portion like the shifting lever 83, they do not expand and contract like the shifting lever 83.

In addition, a solution tank (sink) 124 for storing water as a solution is disposed at a position on the front side and the left-right direction (right side) of the seedling conveyance unit 5. Further, the solution tank 124 is disposed at a position on the right side of the seedling stage 82. The planting clutch shaft 77 protrudes toward the right side of the first casing portion 32a of the planting transmission case 32, and the pump driving flange 125 is attached to the planting clutch shaft 77, and is offset from the rotation center of the pump driving flange 125. The front end of the pump cylinder rod 127 constituting a pump (plunger pump) 126 for supplying water is connected to the displaced position. In addition, the pump cylinder portion is coupled to the body. Therefore, the water is supplied from the solution tank 124 to the pump 126 via the supply pipe 128, and the pump drive flange 125 is rotated by the driving of the planting clutch shaft 77, whereby the pump cylinder rod 127 reciprocates by the crank motion, in order The water in the cylinder is sent out. The planting gearbox 32 is mounted on the transmission path of the seedling transplanter 1 to mount the pump 126 to the planting clutch disposed at the uppermost transmission shaft. By the shaft 77, the pump 126 can be placed at a high position, and the drop to the solution discharge port 129, which will be described later, can be ensured, and the water can be smoothly conveyed, and the water remaining in the supply pipe 128 can be easily stored at the end of the work. discharge. The pump drive flange 125 is a double flange structure in which the base flange portion 125a that rotates integrally with the planting clutch shaft 77 and the adjustment flange portion 125b that is attached to the base flange portion 125a by a mounting bolt, and is provided with an adjustment. A mounting bolt is inserted into the long hole of the flange portion 125b. The pump cylinder rod 127 is connected to the connection portion including the adjustment flange portion 125b, and the adjustment flange portion 125b is moved (rotated) along the long hole with respect to the base flange portion 125a, whereby the cylinder rod 127 is pumped. The operation timing (actuation phase) of the reciprocating motion is changed, and the irrigation timing (phase) with respect to the actuation phase of the seedling planting device 6 is changed and adjusted.

In the standard, the irrigation timing discharges water from the solution discharge port 129 from the time when the seedling holding tool 31 enters the soil until reaching the bottom dead center position, and the rotation angle of the driving arm 34 is rotated by about 90 degrees. Timing. Then, the irrigation timing can be continuously adjusted by adjusting the rotation of the flange portion, and when the irrigation timing is the latest, after the seedling holding tool 31 is withdrawn from the soil, the squeegee 108 and the seedling holding tool 31 are Irrigation before contact. On the other hand, when the irrigation timing is the earliest, the seedling cultivation tool 31 starts the irrigation before the planting supply position A holds the seedlings and enters the soil. Therefore, the solution discharge port 129 which is inserted into the soil together with the seedling type holding tool 31 to discharge the solution to the farmland is provided, and is configured to adjust the timing of discharging the solution from the solution discharge port 129 to the solution only. When the discharge port 129 is in the soil, the timing of discharge, the solution discharge port 129 is entering The state of the state in the soil and the timing of discharge in the state of not entering the soil.

In addition, the seedling-type gripping tool 31 is composed of a shaft portion 31a that is attached to the mounting side of the gripper tool 41, and a plate-shaped grip portion 31b that grips the seedling formed at the tip end of the shaft portion, and the grip portion is welded by welding. 31b is fixed to the inner end of the shaft portion 31a in the left-right direction. In the seedling seed holding tool 31 on the left side, the shaft portion 31a is formed of a pipe, and the end portion of the tubular hollow portion of the shaft portion 31a on the side of the grip portion 31b is exposed to the left and right outer sides of the grip portion 31b. The exposed portion constitutes a solution discharge port 129 for discharging water. Therefore, water is discharged to the outside of the seedling-carrying tool 31 (opposite to the left and right sides of the seedling), so that the influence of the water on the planted seedlings can be prevented, and the planting accuracy can be improved. Further, the shaft portion 31a of the seedling culture holding tool 31 on the left side is bent toward the upper right side of the tool holder 41 side, and the end portion is connected to the supply pipe 128 for transferring water from the pump 126. Therefore, by using the solution discharge port 129, the solution can be supplied (irrigated) to the vicinity of the planted seedling. In other words, the end portion of the shaft portion 31a is disposed obliquely toward the other side (right side) of the seedling holding tool 31, and the interference with the position adjusting bolt 151 on the left side is suppressed, and the flow of water is smooth. Next, the solution discharge port 129 is provided only on the seedling seed holding tool 31 on the left side, and the solution solution discharge port 129 is not provided in the seed seed type holding tool 31 on the right side.

Therefore, the seedling transport unit 5 is disposed so as to be shifted toward the left and right sides (left side) of the transport start end side of the upper lateral transport unit 5a, and the storage solution is placed. The solution tank 124 of the agent is disposed so as to be offset from the left and right sides (right side) of the seedling conveyance unit 5, and the solution discharge port 129 is provided only on the seed planting gripping tool 31 on the side (left side) where the seedling conveyance unit 5 is offset. The solution discharge port 129 is configured to discharge the solution toward the farm in the vicinity of the seed dressing tool 31 or the seed plant holding tool 31.

The driving resistance of the pump 126 is transmitted to the planting clutch shaft 77, thereby suppressing the operation of the seedling planting device 6 from being actuated by the desired operation due to its own weight, inertia, or the like. Even when the pump 126 is removed from the body or when the pump 126 is removed from the body, the pump 126 can be replaced by a brake device for transmitting a braking force to the planting clutch shaft 77, thereby suppressing the operation of the seedling device 6 by its own weight or Inertia and other actions are more active than the desired action. Further, when the driving resistance of the pump 126 is small and the preceding operation of the seedling planting device 6 cannot be sufficiently suppressed, the auxiliary spring that suspends the seeding type holding tool 31 from the upper side is provided, and the auxiliary spring is assisted to be suppressed by the elastic pressure of the auxiliary spring. The aforementioned actions are taken first. Further, a shield covering the pump 126 is provided, and even in a state in which the brake device is mounted instead of the pump 126, the shield can be attached to the body to improve safety. A lookup table for planting plant spacing according to the traveling speed or the plant pitch shift is attached to the shield, and the lookup table can be confirmed regardless of whether the pump 126 or the brake device is installed.

Further, when water is temporarily not supplied, the water is circulated by the return pipe for returning the water sent from the pump 126 to the solution tank 124, and the operation can be performed without watering without removing the pump 126. In addition, a switching valve is provided, which The switching valve switches the water sent from the pump 126 to a state of being supplied to the supply pipe 128 of the solution discharge port 129 and a state of being supplied to the return pipe.

According to the above, the seedling transplanting machine 1 self-propelled the body by the traveling device 4 in a state in which the left and right front wheels 8 and the rear wheels 7 are used to straddle the soil, and the rear wheel 7 on the left side is used. The operator who runs on the left side of the front wheel 8 and the rear wheel 7 through which the front wheel 8 and the rear wheel 7 pass is supplied with the potato seedlings toward the upper lateral conveying portion 5a of the seedling conveying portion 5 of the self-propelled body. The seedling transporting unit 5 transports the supplied seedlings, and then the seedling planting device 6 plantes the seedlings transported by the seedling transporting unit 5 toward the planting supply position A into the farmland. The seedling transport unit 5 includes a plurality of seedling storage bodies 26 in the seedling transport direction C, and the sweet potato seedlings are housed in the seedling storage body 26 in a posture in which the vines are oriented in the front-rear direction. The operator supplies the seedlings to the seedling container 26 that is conveyed in the left-right direction on the upper side of the body by the upper lateral conveying unit 5a. That is, the operator supplies the lower end portion of the vine of the seedling to the jig 49 and fixes the seedling to the seedling receiving body 26. The seedling storage body 26 to which the seedlings are supplied is conveyed to the lower side of the body by the descending conveying portion 5b that is continuous with the upper lateral conveying portion 5a. The seedling container 26 conveyed by the descending conveyance unit 5b is conveyed to the upper side of the machine body by the ascending conveyance unit 5c, and returns to the conveyance start end side of the upper lateral conveyance unit 5a. The seedling planting device 6 moves the seedling-carrying gripping tool 31 up and down by the driving unit, and the seedling receiving body that is transported by the descending transporting unit 5b toward the planting supply position A on the rear side of the seedling receiving body 26 The rear end of the seedling of 26 is used to plant the seedlings in the farmland. At this time, the seedlings are clamped and fixed by the jig 49 of the seedling container 26, but the seedlings of the seedling planting device 6 are planted. Since the gripping force of the gripping tool 31 is larger than the gripping force of the jig 49, the seedling planting device 6 is detached from the jig 49 by moving the seedlings toward the rear side along the planting trajectory T.

When the potato seedlings are transplanted, the operator supplies the lower end portion of the seedling rattan to the jig 49 of the seedling storage body 26 of the upper lateral conveying portion 5a of the seedling conveying portion 5, and supplies the lower end of the curved rattan t. When the seedling is supplied to the lower side, the seedling is transported by the seedling transporting unit 5, and at the planting supply position A, the lower end of the rattan t is directed upward, and the leaves of the seedling are oriented upward with respect to the rattan. Next, the seedling planting device 6 is used to transplant the seedlings into the soil in this posture. Therefore, the seedling-growing device 6 has a simple conveying path in the soil, so that the vine is not easily bent or twisted, and the transplanting accuracy is improved, and the potato seedlings can be transplanted in a state in which the leaves are concentrated toward the upper side with respect to the inclined vine. In addition, the pair of seedlings holding tools 31 that are vertically extended are held at the lower end of the vine which is curved upward by the planting supply position A, and the orientation of the seedling holding tool 31 can be made relative to the curved vine. The orientation of the lower end is in a state close to the vertical direction, and even if the position of the seedling is slightly shifted at the planting supply position A, the clamping of the seedling can be stabilized and stabilized, and the seedling can be planted in an appropriate posture to stabilize the seedling. Miao transplant.

Therefore, since the sweet potato seedlings can be transplanted in a state in which the leaves are concentrated toward the upper side with respect to the inclined vines, the leaves of the transplanted seedlings can protrude toward the outside of the soil and receive light such as sunlight, and the elongation of the roots is also strong, and Good growth, so that the cultivation of sweet potatoes can be strong. Also, due to the orientation of the vine, In particular, since the orientation of the leaves with respect to the axial center of the rattan is determined based on the orientation of the lower end of the vine which is easy to bend, the determination is facilitated, and the work of supplying the seedlings to the jig 49 is facilitated, and the worker is moved toward the seedling receiving body 26 In the work efficiency of the seedling supply operation, the seedling transport unit 5 which is intended to improve the efficiency of the transplant operation can be operated at a high speed, and the work efficiency of the seedling transport operation of the seedling transport unit 5 can be improved.

19‧‧‧Main clutch lever

23‧‧‧Handle frame

31‧‧‧ Seedling holding tool

32a‧‧‧First housing part

32c‧‧‧ third shell

34‧‧‧ drive arm

36‧‧‧Support link

37‧‧‧Swing link

38‧‧‧Support frame

43‧‧‧Opening and closing cam

66‧‧‧ linkage rod

90‧‧‧ Third driven sprocket

92‧‧‧Overlay wheel

93‧‧‧Stabilization spring

96‧‧‧Overburrk installation frame

100‧‧‧压地轮

101‧‧‧Compressed frame

102‧‧‧Compressed cam

106‧‧‧Scraper support plate

107‧‧‧Scraper arm

107a‧‧‧ plate rotation pivot shaft

108‧‧‧Scraper

109‧‧‧Blasting device

110‧‧‧Scraper roller

111‧‧‧ Tension Roller

113‧‧‧ front and rear drive rollers

114‧‧‧First driven roller

117‧‧‧ slot

121‧‧‧Shift lever guide

Claims (3)

A seedling transplanting machine comprising: a traveling device (4); a seedling transporting unit (5) for transporting seedlings; and a seedling planting device (6) for transporting the seedling transporting unit (5) to the planting supply position (A) The seedlings are planted in the farmland; the seedling planting device (6) is configured to move the seedlings in the front and rear trajectories (T) by the seedlings holding tool (31) of the seedlings at the feeding position (A). In the farmland, there are: a soil-covering tool on the left and right, and a soil covering the seedlings after planting; and a grounding tool (100), which moves downward between the left and right earth-covering tools and presses the soil above the planted seedlings. The pressing tool (100) is housed in the left and right earth-covering tools (92) when viewed from the side of the machine body in a pressed state, and is disposed at a position offset to the rear side when the soil-covering tool is used as a reference; The tool is provided in a pressing frame (101) that rotates up and down. The pressing frame (101) is moved up and down by the driving of the pressing cam (102) while restricting the rotation of the moving side, and is provided with a pressure. The ground frame (101) is fixed to the fixed tool in an upwardly moving position. The seedling transplanting machine of claim 1, wherein the seedling transplanting tool (100) is adjustable in position. The seedling transplanting machine according to claim 1 or 2, wherein the seedling transporting section (5) and the seedling planting apparatus are provided in such a manner as to swing freely. (6) The structure of the seedling transporting unit (5) and the seedling planting device (6) is supported by the grounding of the earth-covering tool (92), and the seedling transporting unit (5) and the seedling planting device (6) are used as a reference. The earth-covering tool height adjusting operation tool (97) for adjusting the height of the earth-covering tool (92) is inclined to the left and right sides of the steering handle (2) and extends rearward, and is disposed below or below the steering handle (2).