JP3562510B2 - Seedling machine - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention belongs to the technical field of field seedling planters.
[0002]
[Prior art]
The seedling transplanter that works in the field works by moving the running car body and operating the seedling tool of the seedling planting machine to transplant the seedlings to the ridges. At the same time, the seedling planting tool moves up and down with respect to the ridges, and the planting depth of the seedlings becomes deeper or shallower. In order to solve this problem, conventionally, for example, as described in Japanese Patent Application Laid-Open No. 5-6, a seedling planting apparatus having a grounding wheel that rolls on the upper surface of a ridge is vertically movable with respect to a traveling vehicle body. When mounted, the seedling plant is configured to move up and down so as to be maintained at a constant height relative to the ridges even when the traveling vehicle body moves up and down. Further, a spring is mounted between the seedling plant, which is mounted to be movable up and down, and the center of the traveling vehicle body, so that the seedling plant is elastically supported on the traveling vehicle body. Therefore, in the case of this publication, even if the traveling vehicle body moves up and down, the planting depth of the seedlings hardly fluctuates, and the contact load of the contact wheel can be reduced, so that the contact mark of the contact wheel on the ridge is hardly formed.
[0003]
[Problems to be solved by the invention]
In actual field work, the hardness of the soil changes from time to time due to soil quality and moisture, and the grounding load of the grounding wheel may change due to running on uphill and downhill slopes. Must properly adjust the contact load of the contact wheel while checking the condition of the contact mark on the contact wheel. However, according to the above-mentioned publication, a spring is applied between the front and rear intermediate portion of the seedling plant that moves up and down and the center of the traveling vehicle body, and it is difficult to precisely adjust the elastic supporting force of the spring, Since the adjustment point of the elastic support force of the spring is located at the center of the vehicle body and at the front side of the planting tool, it is easy for the operator who is behind the steering handle for the aircraft to check the state of the grounding mark of the grounding wheel easily and easily. It is in a place where it is difficult to operate quickly.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention provides a steering handle 39 at the rear of a traveling body 7 having a pair of left and right wheels 5 on a front side and a pair of left and right wheels 6 on a rear side. The seedling-planting device 40 provided with the seedling-planting tool 72 for transplanting the seedlings to the ridges on the rear side of the running vehicle body 7 is rotated around horizontal axes 43 and 44 disposed forward of the axle of the rear wheels 6. The rear part of the seedling plant 40, which is attached to the rear wheel 6 behind the axle of the rear wheel 6, is configured to be vertically movable with respect to the running vehicle body 7. A supporting device 82 for supporting the ridge is provided, and the seedling plant 40 is elastically supported by the traveling vehicle body 7 between a position near the handle 39 at the rear of the seedling device 40 and a position near the handle 39 at the rear of the traveling vehicle 7. A spring 91 is provided, and the traveling vehicle body 7 is In that a lever 92 for adjusting operation support load of NaeUe device 40 for lifting the handle 39 near the vehicle body 7 rear was seedling planting machine according to claim.
[0005]
[Action]
The seedling transplanter configured as described above travels while the traveling vehicle body 7 is supported by the pair of left and right wheels 5 on the front side and the pair of left and right wheels 6 on the rear side. The operator controls the aircraft at a position behind the steering handle 39 at the rear of the traveling vehicle body 7. Then, the traveling vehicle body 7 travels forward and the seedling tool 72 of the seedling planting device 40 operates, so that the seedlings are transplanted to the ridges. The seedling plant 40 is rotatably mounted around horizontal axes 43 and 44 disposed forward of the axle of the rear wheel 6, and is located behind the axle of the rear wheel 6. The rear portion of the seedling plant 40 can be moved up and down with respect to the traveling vehicle body 7, and the supporting device 82 provided at the rear portion of the seedling planting device 40 supports the seedling planting device 40 on the ridge. The seedling plant 40 is elastically supported by the traveling vehicle body 7 by a spring 91 provided between the location and a location near the handle 39 at the rear of the traveling vehicle body 7. As a result, the seedling-planting device 40 moves up and down so that the support device 82 contacts the ridge and maintains a constant height with respect to the ridge, and is elastically supported by the traveling vehicle body 7 via the spring 91. Thus, the contact load of the support device 82 is greatly reduced. Further, the operator at the rear of the traveling vehicle body 7 operates the lever 92 provided near the steering handle 39 to adjust the support load of the seedling plant 40 supported by the traveling vehicle body 7 via the spring 91. By doing so, the contact load of the support device 82 is adjusted.
[0006]
【The invention's effect】
Therefore, according to the present invention, since the seedling plant 40 configured to be vertically movable with respect to the traveling vehicle body 7 is provided so as to be supported by the ridges by the supporting device 82, the traveling vehicle body 7 may be vertically moved due to unevenness of the ground or the like. However, the seedling plant 40 is moved up and down so that the grounding state of the support device 82 to the ridge is maintained, so that the planting depth does not easily fluctuate. Since the support device 82 is elastically supported, the contact load of the support device 82 is reduced, and the contact mark of the support device 82 hardly remains even in a ridge of a soft field of soil. Further, the seedling plant 40 is rotatably mounted around horizontal axes 43 and 44 disposed forward of the axle of the rear wheel 6, so that the seedling plant 40 is located behind the axle of the rear wheel 6. The rear portion of the seedling plant 40 is configured to be movable up and down with respect to the traveling vehicle body 7, and the seedling plant 40 is attached to the traveling vehicle body 7 between a portion near the handle 39 at the rear of the seedling plant 40 and a portion near the handle 39 at the rear portion of the traveling vehicle 7. Since the spring 91 for elastically supporting the spring 91 is provided, the front-rear length from the vertical rotation fulcrum of the seedling-planting device 40 to the mounting point of the spring 91 is sufficiently ensured, and the adjustment of the elastic supporting force of the spring 91 is precisely performed. I can do it. In addition, since the lever 92 for adjusting the supporting load of the seedling plant 40 supported by the traveling vehicle body 7 via the spring 91 is provided near the handle 39 at the rear of the traveling vehicle body 7, the lever 92 is located behind the handle 39 and the grounding wheel is grounded. The operator who checks the state of the trace can easily and quickly operate, and can adjust the ground contact load of the support device 82 accurately and easily and quickly according to the hardness of the soil. Furthermore, since the supporting device 82 for supporting the seedling planting device 40 on the ridge is provided at the rear of the seedling planting device 40 located behind the axle of the rear wheel 6, the support is provided from the vertical rotation fulcrum of the seedling planting device 40. The front-to-back length of the device 82 to the ground contact point is also sufficiently ensured, and the up-and-down movement of the seedling plant 40 is performed lightly, so that the contact mark when the planting device 40 moves up and down hardly occurs. Since the seedling plant 72 is also provided on the rear side of the seedling plant 40, the front-rear length from the vertical rotation fulcrum of the seedling plant 40 to the seedling plant 72 is sufficiently secured. Changes in the front-back posture of the seedling planting tool 72 during up and down can be suppressed to a small level, and the planting posture of the seedlings can be favorably maintained.
[0007]
【Example】
Next, an embodiment of the present invention will be described. As shown in FIGS. 1, 2, 3 and 4, the engine 2 is fixed in front of the main gear box 1, and the transmission case 3 and the support frame 4 extend rearward from both sides of the main gear box 1. A pair of left and right drive wheels 5 and auxiliary wheels 6 are arranged on the front and rear sides, respectively, to form a traveling vehicle body 7. The drive wheel 5 and the auxiliary wheel 6 are provided so as to pass through the valley A of the ridge.
[0008]
A pair of wheel cases 8 are mounted on both sides of the main gear box 1 so as to be rotatable around a horizontal axis. The wheel cases 8 extend downward and rearward at an angle, and the drive wheels 5 are provided at the respective rear ends. ing. The power of the engine 2 is transmitted to the small gear 10 via the centrifugal clutch 9, reaches the worm 12 from the large gear 11, passes through the left and right side clutches 14 from the worm wheel 13, passes through the wheel case 8, and drives the drive wheel 5. (FIG. 4).
[0009]
A pair of brackets 15 is fixed downward to the rear ends of the transmission case 3 and the support frame 4 respectively, and the support shaft 16 extends outward from this, and the upper end of the support leg 17 of the auxiliary wheel 6 rotates around the support shaft 16. It is movably mounted. A vertical cylinder 18 is mounted between the transmission case 3 and the support frame 4, and a rear end of the piston rod 19 protruding rearward from the cylinder 18 is fixedly provided at the center of the horizontal rod 20. A pair of arms 21 extend upward from the tip of each wheel case 8, the upper end of the left arm 21 is connected to the left end of the horizontal rod 20 by a rod 22, and a rotating cylinder 23 is attached to the upper end of the right arm 21. The rear end of the piston rod 24 extending from here is connected to the right end of the horizontal rod 20. A pair of arms 25 project upward from the respective legs 17, the upper end of the left arm 25 is connected to the left end of the horizontal rod 20 by a rod 26a, and the upper end of the right arm 25 is connected to the rear of the cylinder 23 by a rod 26b. ing.
[0010]
The oil discharged from the pump 27 is sent into the cylinder 18 by switching the oil path by the valve 28, the piston rod 19 is made to protrude and retract, and the drive wheel 5 and the auxiliary wheel 6 are simultaneously moved up and down. The oil discharged from the pump 29 is sent into the cylinder 23 by switching the oil path by the valve 30, and the piston rod 24 is moved up and down to move the right driving wheel 5 and the auxiliary wheel 6 up and down.
[0011]
A shaft 31 is attached to the bracket 15, and is provided on the shaft 31 so that the tip of an arm 32 projecting forward moves up and down by a lever 33. The tip of a sensor 34 sliding on the top B of the ridge is rotatably attached to the tip of an arm 32 by a pin 35, and the tip of an arm 36 extending upward from the tip is connected to the valve 28 by a rod 37. I have.
[0012]
When the valley A through which the drive wheel 5 and the auxiliary wheel 6 pass is deep, the body (bracket 15) of the traveling vehicle body 7 goes down. Then, the rear end of the sensor 34 is pushed up at the top B, the arm 36 turns counterclockwise, and the rod 37 pushes the valve 28. At this time, the oil discharged from the pump 27 enters the left chamber of the cylinder 18, the piston rod 19 protrudes rearward, and the horizontal rod 20 moves rearward. Therefore, each arm 21 is pulled back by the rod 22 and the integral cylinder 23 and piston rod 24, each arm 25 is pulled forward by the rods 26a and 26b, and the wheel case 8 and the supporting leg 17 are turned clockwise. The drive wheel 5 and the auxiliary wheel 6 move down. That is, the body of the traveling vehicle body 7 is lifted by the cylinder 18 and returns to a certain height from the top B of the ridge. When valley A comes to a shallow place, it operates in reverse. When the lever 33 is operated to change the latching position with respect to the support plate 38 (FIGS. 2 and 5), the position of the pin 35 is adjusted up and down, so that the distance between the traveling body and the top B of the ridge can be selected. .
[0013]
The valve 30 is manually operated in the figure, and is operated when the ridges are provided along the contour line in the inclined field to keep the body of the traveling vehicle body 7 horizontal. It is also possible to provide an inclination sensor on the body of the traveling vehicle body 7 and to automatically configure the valve 30 to operate by a signal from the sensor. A handle 39 having a bifurcated rear end is provided fixed to the right bracket 15, so that the operator can operate while walking.
[0014]
The seedling plant 40 is attached to the traveling vehicle body 7 so as to be vertically movable. That is, the rotating case 41 and the rotating frame 42 are located at the rear ends of the transmission case 3 and the support frame 4, respectively, and are rotatably mounted on the transverse transmission shaft 43 and the rotating shaft 44, respectively. A transmission case 45 extends rearward from the rotating case 41, and a lateral transmission case 46 is fixed to a rear end of the transmission case 45. A planting case 47 extends obliquely upward from the rear. The rear end of the rotating frame 42 is connected to the rear end of the planting case 47 by a connection frame 48. These form a U-shaped planting frame as viewed from above, and are concentric with the transmission shaft 43. It turns around the turning shaft 44.
[0015]
As shown in FIG. 4, a large gear 50 is engaged with a small gear 49 that rotates integrally with the worm wheel 13, and a tooth wheel 51 that rotates integrally with the small gear 49 and a tooth wheel 52 fixed to the transmission shaft 43 are chained. 53 is wound. The tooth wheel 54 is fixed to the transmission shaft 43 in the rotating case 41 so that the rotation of the traveling vehicle body 7 is transmitted to the seedling plant 40 side. The rotation reaches the drive shaft 55 in the transmission case 46 through the transmission case 45.
[0016]
As shown in FIG. 1, a support rod 56 extends obliquely forward from the transmission case 45, and a roller 57 is provided at the tip of the support rod 56. A lateral receiving plate 58 is fixed to the planting case 47, and the seedling mounting table 59 is supported by this and the roller 57 so as to move left and right. As shown in FIG. 4, a chain 63 is wound around a tooth wheel 61 fixed to the lead cam 60 and a tooth wheel 62 fixed to the driving shaft 55, and the rotation of the driving shaft 55 causes the lead cam 60 to rotate. Is reciprocated right and left.
[0017]
A first rotating case 64 is rotatably mounted inside the rear end of the planting case 47, and a chain 67 is wound around a tooth wheel 65 integrated with the first rotating case 64 and a tooth wheel 66 of the driving shaft 55. The case 64 is made to rotate clockwise in FIG. A second rotating case 68 is rotatably mounted on a side surface of the first rotating case 64, and a planetary gear 69 fixed thereto is engaged with a non-rotating sun gear 71 via an intermediate gear 70, and the first rotating case 64 It is designed to rotate counterclockwise. Then, due to the number of teeth of the sun gear 71 and the planetary gear 69, the second rotating case 68 faces forward when the first turning case 64 faces forward and backward, and the second rotating case when the first rotating case 64 faces up and down. The case 68 is arranged on an extension of the case 68.
[0018]
A seedling plant 72 is rotatably attached to the side surface of the second rotating case 68 and is fixed to a tip gear 73 thereof. The tip gear 73 meshes with the base gear 75 integral with the first rotating case 64 via the intermediate gear 74, so that the second rotating case 68 keeps the same posture with respect to the ground when rotating. As shown in FIG. 1, the seedling-planting tool 72 includes a pair of claws 76 that open and close in the left and right directions and a pusher 77 that moves up and down, and is configured to operate with a cam integrated with the second rotating case 68. .
[0019]
That is, the seedling mounting table 59 reciprocates left and right with the seedlings placed thereon. The seedling-planting tool 72 is revolving vertically in a long orbit. When the seedling-planting tool 72 passes through the seedling opening of the receiving plate 58 during the downward movement, the seedling pushed out from the seedling mounting table 59 onto the receiving plate 58 is pinched by the right and left claws 76. When reaching the lower end by lowering, the right and left claws 76 are opened, and the pushing tool 77 is lowered to push the seedling into the ground. Note that the seedlings at the end of the seedling mounting table 59 are taken out one by one in the horizontal direction in this way, and when there are no seedlings in this row, the seedlings in the front are pushed backward by the lower feed belt in the figure. .
[0020]
As shown in FIGS. 1 and 5, the tip of the L-shaped support rod 78 as viewed from above is rotatably attached to the lower abdomen of the planting case 47 by a lateral pin 79. A vertical rod 80 is fixed to the end of the support rod 78 at the center position of the seedling plant 40, and an axle 81 is fixed to the lower end of the vertical rod 80. , The top B of the ridge. Note that this support device may be configured by a sled instead of the wheel.
[0021]
The female screw rod 83 is attached to the left of the support rod 78, the female screw rod 85 is rotatably mounted on a bracket 84 that projects rearward from the mounting case 47, and the female screw rod 85 is screwed into the female screw rod 83 to rotate the male screw rod 85. When this is done, the screw-in depth changes and the wheel 82 moves up and down (the planting depth of the seedling is adjusted). A support bar 86 extends inward from the handle 39, and a sector plate 87 is fixed vertically ahead of the support bar 86. The tip of the arm 88 is rotatably attached to the fan-shaped plate 87, and the height of the rear end is changed by selecting the attachment hole 89. A lever 90 is provided on the vertical rod 80, and both ends of a spring 91 are attached to the lever 90 and the rear end of the arm 88, and most of the weight of the seedling plant 40 is supported by the traveling vehicle body 7 via the spring 91. It is made as follows. Then, the position of the arm 88 is adjusted when the seedling plant is driven up and down on a slope and when the weight of the seedling is different, and the load shared by the wheels 82 is adjusted. The arm 88 can be configured so that a one-touch operation can be performed with the lever 92.
[0022]
As shown in FIG. 1, the support rod 93 extends forward from the handle 39, and both ends of the spring 94 are attached to the tip and the seedling plant 72. The rotating seedling plant 72 is pulled up by the spring 94, and the rotating case 64, The play of the seedling plant 72 based on the backlash of the gear in 68 is made to be killed. As shown in FIGS. 1 and 6, a drilling tool and a cover soiling tool are provided on the lower abdomen of the seedling planting device 40. That is, the tips of a pair of upper and lower links 96 and 67 are rotatably mounted on the support plate 95 integrated with the transmission case 46 by the horizontal shafts 98 and 99, and the hole making claw 100 provided at the rear end thereof moves vertically in parallel. To be provided. A roller 101 is mounted in the middle of the upper link 96, and when the drilling cam 102 fixed to the main drive shaft 55 rotates counterclockwise and pushes down the roller 101, the rear ends of the links 96 and 97 oppose the spring 103. Then, the hole making claw 100 protrudes into the top B of the ridge to form a hole, and then, as described above, the seedling plant 72 transplants the seedling into the hole.
[0023]
The tips of a pair of left and right operating rods 104 bent in an L shape are rotatably attached to the support plate 95. A spherical pressing ring 106 is provided at the rear end of each operating rod 104 via a leaf spring 105. The lever 107 extends upward from the tip of the operating rod 104 and is pulled by the spring 108 so that the pressing wheel 106 is pulled up. When the roller 109 provided at the upper end of the lever 107 is pushed by the earth covering cam 110 fixed to the main driving shaft 55, the pressing wheel 106 is lowered to push the soil next to the hole inward. . In particular, the cover cam 110 is formed bifurcated when viewed from the side, and when the projection 110a on the front side pushes down the roller 109, the left and right pressing wheels 106 are slightly behind the seedling C as shown in FIG. When the traveling vehicle body 7 is moving forward, the left and right pressing wheels 106 move the soil slightly forward of the seedling C to the center. It is coming. The tip of each operating rod 104 is attached to the support plate 95 in a C-shape as viewed from the rear, so that the left and right pressing wheels 106 descend while moving inward from the outside.
[0024]
As shown in FIG. 8, it is effective to move the pin 82, which is the pivot point of the sensor 34, and the wheel 82 up and down in conjunction with each other. That is, the upper end of the downward cylinder 111 is rotatably attached to the bracket 84, and the piston 112 projecting upward from the axle 81 is housed therein, and is provided so as to be pressed down by the spring 113. The upper end of the piston 112 and the front of the arm 32 are connected by a wire 114. Then, when the position of the pin 35 is moved up and down by operating the lever 33, at the same time, the piston 112 moves up and down, and the wheel 82 moves up and down. Therefore, a vertical posture of the transplanted seedlings is always ensured.
[0025]
As shown in FIG. 9, the following measures can be taken in order to make the structure of the spring 94 that raises the seedling-planting tool 72 and kills its play compact. That is, the box-shaped support 115 extends upward from the vehicle frame 48, and four pulleys 117 are rotatably mounted on the shaft 116 at the upper end thereof. A moving frame 118 is slidably housed under the moving frame 118 and is pulled downward by a spring 119. Four pulleys 120 are rotatably mounted on a shaft 121 on the upper part of the moving frame 118. After the wire 122 having one end fixed to the right pulley 120 is wound around the upper and lower pulleys 117 and 120, respectively, the other end is fixed to the seedling plant 72 via the rolling wheel 123 in front of the support 115. Have been. Accordingly, when the seedling-planting tool 72 turns vertically in a long orbit, the moving frame 118 moves up and down against the spring 119, but the moving amount of the moving frame 118 is larger than the moving amount of the seedling-planting tool 72. Is significantly reduced, resulting in a compact configuration.
[Brief description of the drawings]
FIG. 1 is a side view of a seedling transplanter according to the present invention.
FIG. 2 is a plan view of a part of the seedling planter.
FIG. 3 is an explanatory view showing an outline of a seedling planter.
FIG. 4 is a diagram of a transmission mechanism of a seedling transplanter.
FIG. 5 is a rear view of a portion of the seedling plant;
FIG. 6 is an enlarged side view of a hole and a covering portion of the seedling planter.
FIG. 7 is a plan view of a part of a soil covering part of the seedling planter.
FIG. 8 is an explanatory view showing another embodiment of the sensor and the wheel (supporting device).
FIG. 9 is a cut-away side view showing another embodiment of an apparatus for lifting a seedling plant.
[Explanation of symbols]
5 wheels (drive wheels)
6 wheels (auxiliary wheels)
7 Running body 39 Handle 40 Seedling plant 43 Horizontal axis (transmission axis)
44 Horizontal axis (rotating axis)
72 Seedling plant 82 Support device (wheel)
91 Spring 92 Lever

Claims (1)

A steering handle 39 is provided at the rear of the traveling body 7 having a pair of left and right wheels 5 on the front side and a pair of left and right wheels 6 on the rear side, and the seedlings are transplanted into the ridge on the traveling body 7. A seedling plant 40 provided with a seedling planting tool 72 on the rear side is rotatably mounted around horizontal shafts 43 and 44 disposed forward of the axle of the rear wheel 6. The rear part of the seedling plant 40 located further rearward is configured to be able to move up and down with respect to the traveling vehicle body 7, and a supporting device 82 for supporting the seedling plant 40 on the ridge is provided at the rear part of the seedling plant 40. A spring 91 for elastically supporting the seedling plant 40 on the traveling vehicle body 7 is provided between a portion near the handle 39 at the rear portion of the seedling plant 40 and a portion near the handle 39 at the rear portion of the traveling vehicle body 7, and travels via the spring 91. Adjusting the support load of the seedling plant 40 supported by the vehicle body 7 Seedling planting machine according to characterized in that a lever 92 to the handle 39 near the vehicle body 7 rear to.

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