JPH04320605A - Seedling-planting unit in transplanter - Google Patents

Abstract

PURPOSE:To transplant seedlings constantly to a prescribed depth by vertically moving a seedling-insertion tine by the amount of the whole stroke without fail when lowering the seedling-insertion tine, inserting the seedlings into the field and planting them. CONSTITUTION:A seedling-insertion tine 16 for inserting seedlings 14 into the field during a process of lowering is equipped so as to be vertically movable interlocking to a shaking arm 56. The seedling-insertion tine 16 is designed so as to be energized downward by a spring 63 and the shaking arm 56 so as to be driven by a cam 53 rotating round a horizontal shaft 19. In its power transmission system for driving the cam 53, a speed change system for reducing the rotational speed of the cam 53 during vertical movement of the seedling- insertion tine 16 is equipped.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seedling planting device for a transplanter used for transplanting sweet potato seedlings and the like.

0002

[Prior Art] As a transplanter for transplanting vine seedlings such as sweet potato seedlings, a pair of seedling insertion claws that hold the base side of the seedlings are attached to a disc that rotates about a horizontal axis in a radial direction to move in and out in the radial direction. In addition, when the seedling insertion claw reaches the lower planting position, a drive mechanism is installed that moves the seedling insertion claw at the planting position up and down by the expansion and contraction of the cylinder, and the rotation of the disk is The applicant has already proposed a device in which the cylinder of the drive mechanism is extended and contracted in synchronization with the seedling insertion claw, and the seedlings are inserted into the field and planted (for example, in Japanese Patent Application No. -2707
No. 86, etc.).

0003

[Problems to be Solved by the Invention] This transplanter has advantages in transplanting vine seedlings, such as having a mechanism for holding the seedlings radially on the side of the disc. However, because the cylinder of the drive mechanism forcibly moves in and out by expanding and contracting the cylinder, even if there is an obstacle such as a stone in the soil of the field, the cylinder will move the seedling claw regardless of the obstacle. There are problems such as the seedling insertion claws being bent and damaged due to being forced down.

[0004] Also, a crank, a cam, etc. are used as the drive mechanism,
It is possible to adopt a configuration in which the seedling insertion claw is moved in and out using a crank, cam, etc., but in this case, as long as the seedling insertion claw is forcibly lowered by the crank, cam, etc., the same problem remains. . In view of this, the present invention is capable of lowering the seedling insertion claw to prevent damage beforehand if there is a predetermined resistance or more when the seedling insertion claw is lowered, and also allows the seedling insertion claw to be lowered by the entire stroke. To provide a planting device for a transplanter that can surely move up and down to plant seedlings at a predetermined depth.

[0005]

[Means for Solving the Problems] The present invention provides a method for reducing seedlings when descending.
A seedling insertion claw 16 for inserting the seedling insertion claw 16 into the field is provided to be movable up and down, a swinging arm 56 is provided for vertically moving the seedling insertion claw 16, and a spring 63 is provided for biasing the seedling insertion claw 16 in the downward direction. A power transmission system 79 that drives the cam 53 is provided, and a cam 53 that rotates around the horizontal axis 19 to swing the swing arm 56 is provided.
A speed change mechanism 81 is provided inside to reduce the rotational speed of the cam 53 when the seedling insertion claw 16 moves up and down.

[0006]

[Operation] When transplanting the seedlings 14, the power transmission system 79
The cam 53 is driven to rotate around the horizontal axis 19. Then, the swing arm 56 swings, and in conjunction with this, the seedling insertion claw 16 moves up and down. At this time, the seedling insertion claw 16 is attached to the spring 63.
The seedling 14 is biased in the direction of insertion, and is lowered by the spring pressure to insert the seedling 14 into the soil. Therefore, if there is an obstacle in the soil, the seedling insertion claw 16 can stop descending against the spring pressure.
This prevents damage such as bending.

During the vertical movement of the seedling insertion claw 16, the power transmission system 79
The speed change mechanism 81 lowers the rotational speed of the cam 53. Therefore, even when the change in the shape of the cam 53 is increased to rapidly move the seedling insertion claw 16 up and down in a very short time,
The swing arm 56 can be rocked following the cam shape. Therefore, the seedling insertion claw 16 can be reliably moved up and down by the stroke according to the cam shape,
The seedlings 14 can always be planted at a predetermined depth without causing insertion failure of the seedlings 14.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below in detail with reference to the drawings. FIGS. 1 and 2 show an outline of a transplanting machine. Reference numeral 1 denotes a machine frame, which is equipped with a front wheel 2 and a rear wheel 3 for driving, and a handle 4 for changing direction at the rear. 5 is a seat for the operator, and 6 is an engine for driving each part, and these are arranged in the rear of the machine frame 1, one behind the other.

Reference numeral 8 denotes a movable frame, and a planting device 9 is attached to this movable frame 8. Movable frame 8 is the rotation axis 1 at the front end
Adjustment mechanism 1 is pivoted to the mounting bracket 1a of the machine frame 1 by 0 so as to be vertically movable, and is interposed between the machine frame 1 and the machine frame 1.
1 allows the rear side to be adjusted up and down. Planting device 9
A rotating drum 13 having eight seedling loading sections 12 arranged at equal intervals in the circumferential direction, and a seedling system in which vine seedlings 14 sent to the lower planting position A by the rotation of the rotating drum 13 are inserted into ridges 15 in the field. The base of the seedling 14 is inserted and planted through a hole made in the multi-film 18 using a punching tool 17.

As shown in FIGS. 3 and 4, the rotating drum 13 is fixed to a horizontal shaft 19 via a disc 23 on one side, and the horizontal shaft 19 is rotatably supported by the movable frame 8. 20
21 is a copying roller for copying and traveling along the ridge 15;
2 is a pressure wheel that suppresses both sides of the seedling 14 after planting, and 22 is a seedling mounting stand. As shown in FIGS. 5 to 8, each seedling loading section 12 of the rotating drum 13 has a mounting plate 25 having a claw extension hole 24 for advancing and retracting the seedling insertion claw 16, and A seedling insertion cylinder 26 is fixed to the mounting plate 25 on the front side in the rotational direction of the rotating drum 13, and a pair of left and right guide plates 27 are fixed to the mounting plate 25 on both left and right sides of the claw extension hole 24. A plate 25 is attached to the rotating drum 13 from the inside via screws 28. A pair of guide plates 27 are connected to the rotating drum 1
3, the outer protruding part serves as a regulating part 29 that makes the base of the seedling 14 correspond to the claw extension hole 24, and the inner protruding part serves as a guide part 30 for the seedling insertion claw 16.

On the front side of the rotating drum 13, a seedling guide member 31 is provided in an arc shape at the upper part to guide the seedlings 14 inserted into the seedling insertion cylinder 26 of the seedling loading section 12 along the circumferential surface of the rotating drum 13. It is being The seedling guide member 31 has a U-shaped cross section as shown in FIGS. 3 to 5, and is attached to a support frame 32 fixed at the lower center of the movable frames 8 and 8 through brackets not shown. It is being

On the entrance side of the upper end of the seedling guide member 31, as shown in FIG.
As shown in FIGS. 9 and 10, a guide roller 34 with a flange 33 is arranged with a seedling passing space between it and the rotating drum 13, and a pair of left and right guide rollers 34 are arranged between the guide roller 34 and the rotating drum 13. and a pair of left and right support rods 36 that support each guide plate 35 from the outside. The guide roller 34 is made of a soft material such as sponge, and is freely rotatably supported by a horizontal shaft 38 in a notch 37 at the upper end of the seedling guide member 31.

The pair of left and right guide plates 35 guide the tip side of the seedling 14 whose base has been inserted into the seedling insertion tube 26 of the seedling loading section 12 from both left and right sides toward the center, and guide it downward from the upper end. The spacing between the left and right sides gradually narrows as the seedling guide member 31 moves, and is attached to a pair of left and right support rods 36 with the lower end inserted into the entrance side of the seedling guide member 31. The pair of left and right support rods 36 are bent inward from the outer peripheral surface of the rotary drum 13 so as to scoop up the seedlings 14 hanging laterally from the rotary drum 13 and guide them to the upper edge of each guide plate 35. Each support rod 36 has a scooping part 39.
The leg portions 40 are fixed to both left and right sides of the seedling guide member 31.

The seedling insertion claw 16 moves up and down from the claw extension hole 24 of the seedling loading section 12 at the planting position A, and when it descends, it pushes down the seedling 14 of the seedling loading section 12 to remove the seedling in the field. Ridge 15
As shown in FIGS. 11 and 12, a seedling engaging recess 41 is formed in a V-shape at the lower end,
Further, the seedling engaging recess 41 is formed into an arcuate curved surface so as to prevent the seedling 14 from being damaged. The seedling insertion claw 16 is shown in Fig. 13.
As shown in FIG. 14, it is arranged in the lower front part of the rotary drum 13 in a vertically downwardly inclined manner, and is supported and guided so as to be movable up and down by a guide rail 42 and a pair of clamping rollers 43 and 44. be done.

The guide rail 42 is connected to the movable frame 8 and the support frame 3.
A guide bearing 46 pivotally supported by a bracket 45 at the upper end of the seedling insertion claw 16 is guided by the guide rail 42 between the two. One of the pinching rollers 43 of the pair of pinching rollers 43 and 44
is rotatably supported on the support frame 32 by a support shaft 47, and the other nipping roller 44 is rotatably supported at the lower end of the swing bracket 48 by a support shaft 49. The swing bracket 48 is swingably supported by a pivot shaft 50 whose upper end is fixed to the support frame 32, and is biased by a helical spring 51 in a direction in which the holding roller 44 approaches the holding roller 43.

As shown in FIGS. 3, 4 and 13, a sprocket 52 is fixed to the horizontal shaft 19, and a first cam 53 for driving the seedling insertion claw 16 and a second cam 53 for adjusting the spring pressure are fixed to the horizontal shaft 19. A cam 54 and a sprocket 55 are fitted together so that they can freely rotate, and a first swing arm 56 is mounted below the first cam 53, and a second swing arm 57 is mounted above the second cam 54.
are placed respectively. The first swinging arm 56 is for moving the seedling insertion claw 16 up and down, and is supported on the movable frame 8 by a pivot 58 on the rear side of the horizontal shaft 19 so as to be able to swing up and down.
A guide bearing 59 is provided at the front end of this first swing arm 56.
is attached by a shaft. The guide bearing 59 is fitted into a long hole 60 formed in the bracket 45.

A swing link 61 is vertically provided at the base of the first swing arm 56 and swings integrally around a pivot shaft 58. The first cam roller 6 is attached to the upper end of this swing link 61.
2 is provided, and one end of a tension spring 63 is connected to the lower intermediate portion to urge the seedling insertion claw 16 in a downward direction so that the first cam roller 62 comes into contact with the first cam 53. The other end of the tension spring 63 is connected to the lower end of a tension arm 65 which is supported by a pivot 64 at the rear end of the movable frame 8 .

The second swing arm 57 is vertically swingably supported on the movable frame 8 by a pivot shaft 66 located above and behind the pivot shaft 58, and has a second cam roller 67 at its front end that comes into contact with the second cam 54. . The second swing arm 57 is operatively connected to the tension arm 65 via a rod 68 so that the tension arm 65 swings in the opposite direction when the second swing arm 57 swings. The first cam 53 includes a holding cam surface 53a that holds the seedling insertion claw 16 in the raised position, and a lowering cam surface 53b that rapidly lowers the seedling insertion claw 16 by the spring pressure of the tension spring 63.
and a lifting cam surface 53c that raises the seedling insertion claw 16 from the lowered position to the raised position. The second cam 54 has a first cam roller 62 attached to the holding cam surface 53 of the first cam 53.
A tensioning cam surface 54a for gradually pulling the tension spring 63 to maximize the spring pressure when the tension spring 63 is in the vicinity of the end of a, and a first cam roller 62 passing over the descending cam surface 53b to the ascending cam surface 53c. It has a release cam surface 54b that releases the tension so that the spring pressure of the tension spring 63 becomes the minimum at the point when the tension is reached. Note that the second cam 54, the second swing arm 57, the tension arm 65, and the like constitute a spring pressure adjustment mechanism.

As shown in FIGS. 17 and 18, the boring tool 17 is made by cutting the lower end rear part of a prismatic material slightly larger than the seedling insertion nail 16 in an oblique direction, and has an edge part 69 on the front edge. It is formed in the lateral direction, and an inclined surface 70 is formed obliquely rearward and upward from this edge portion 69. When the punching tool 17 descends, it cuts the multi-film 18 laterally at the edge portion 69 and bends the cut piece backward and downward at the inclined surface 70 to punch a hole in the multi-film 18. There is.

As shown in FIG. 3, the punching tool 17 is disposed vertically below the front end of the rotating drum 13, and is pivoted to a pivot 72 at the front end of the third swing arm 71 so as to be swingable back and forth. At the same time, it is held in a downward position by a front stopper 73 and a helical spring 74. A helical spring 74 is wound around the pivot 72 and urges the punching tool 17 toward the stopper 73. The third swing arm 71, as shown in FIG.
It is arranged in the front-rear direction on the outside of one support frame 32,
The middle part is supported by the pivot 75 of the support frame 32 so that it can freely swing up and down, and the rear end is connected to the swing link 61 via the rod 76 so that it swings up and down in synchronization with the first swing arm 56.
is linked to.

A presser roller 77 is arranged at the rear and lower part of the punching tool 17 to prevent the multi-film 18 from lifting up.
This pressing roller 77 is rotatably attached to the lower end of a swinging rod 78 which is pivotally connected to the support frame 32 and urged downward. The power transmission system 79 that rotationally drives the rotating drum 13 and the cams 53, 54 by the power of the engine 6 is shown in FIG.
As shown in FIG. 16, it is comprised of first to fifth chain transmission mechanisms 80 to 84. The first chain transmission mechanism 80 includes a drive sprocket 85, a chain 86, and a sprocket 87, and the sprocket 87 is fixed to a shaft 88 supported by the machine frame 1. The second chain transmission mechanism 81 is for configuring a transmission mechanism, and has a shaft 88.
It consists of a sprocket 89 fixed to, a chain 90, an eccentric sprocket 91, and a tension mechanism 92. The eccentric sprocket 91 is eccentrically fixed to one end of the rotating shaft 10, and the first cam roller 62 extends from the terminal area of the holding cam surface 53a of the first cam 53 to the descending cam surface 53b, the ascending cam surface 53c, and the holding cam surface 53b. When the chain 90 is in the starting end area of the cam surface 53a, the chain 90 wraps around the large diameter part and the cam 53
, 54, the rotational speed of the rotating drum 13 is slowed down, and when it is in another range, the chain 90 wraps around the small diameter portion to increase the rotational speed.

The tension mechanism 92 is connected to the machine frame 1 by a pivot 93.
a tension arm 94 pivotably supported by;
This arm 94 includes a pair of tension pulleys 95 and 96 provided at both ends, and a tension spring 97 that biases the tension arm 94 in the tension direction, so as to absorb the amount of eccentricity of the eccentric sprocket 91. . The third chain transmission mechanism 82 consists of a sprocket 98 fixed to the rotating shaft 10, a chain 99, and a sprocket 101 fixed to the shaft 100.
Sprocket 102 fixed at 0, chain 103
, sprocket 52. These chain transmission mechanisms 82 and 83 are designed to reduce the speed of the horizontal shaft 19 by 1/8 rotation for each rotation of the rotating shaft 10. Therefore, since the eccentric sprocket 91 is attached to the rotating shaft 10, the rotating drum 13 repeats high-speed rotation and low-speed rotation eight times during one rotation.

The fifth chain transmission mechanism 84 includes a sprocket 104 fixed to the rotating shaft 10, a chain 105, and a sprocket 55. Therefore, the cams 53 and 54 that rotate integrally with the sprocket 55 rotate at high and low speeds due to the eccentricity of the eccentric sprocket 91. Next, we will explain the porting work. When transplanting, cultivate the field in advance to create one furrow.
5 and cover the ridges 15 with the multi-film 18. Then, while moving the transplanter along the ridges 15, holes 106 are made in the multi-film 18 using the punching tool 17 as shown in FIG. Drill from the hole 106 to the ridge 15
The base side of the seedling 14 is inserted into the soil using the seedling insertion claw 16 and the seedling is planted.

When the transplanter runs, the drive sprocket 85 rotates in synchronization with the running speed, so the rotating drum 13 and the cam 53 are rotated through the first to fifth chain transmission mechanisms 80 to 84 of the power transmission system 79. , 54 rotate around the horizontal axis 19 in the direction of the arrow. At this time, the second chain transmission mechanism 8
Since there is an eccentric sprocket 91 on the driven side of 1, the rotating drum 13 repeats high speed rotation and low speed rotation 8 times, and
Rotate. Therefore, the worker sitting on the seat 5 must hold the seedling insertion tube 26 of the seedling loading section 12 on the upper side of the rotating drum 13.
The base side of the seedling 14 is inserted into the seedling insertion tube 26 while the rotary drum 13 is rotating at a low speed, so the seedling 14 can be easily loaded. Moreover, since the speed is not only reduced but also repeated between low and high speeds, the overall average rotational speed can be maintained to a certain extent without causing a decrease in planting efficiency.

When inserting the seedlings 14 into the seedling insertion tubes 26 of each seedling loading section 12, it is desirable to insert the seedlings 14 so that the leading end of the seedlings 14 rests on the rear side in the rotational direction of the rotary drum 13. However, if the seedling 14 is a vine seedling, it is complicatedly bent, so the tip side may not fit within the width of the rotating drum 13 and may hang outward. Such seedlings 14 are placed on the guide plate 3
5 to guide and correct. That is, the rotary drum 13 rotates in the direction of the arrow in FIG.
When the seedling 14 hangs down from the rotating drum 13, it is scooped up by the scooping part 39 of the support rod 36 and guided to the upper edge side of the guide plate 35. And rotating drum 1
3 rotates further, the base is inserted into the seedling insertion cylinder 26, so it is drawn between the pair of left and right guide plates 35 with the base in front, and this guide plate 35 allows the rotation drum 13 to be moved in the width direction of the rotary drum 13. Positioned in the center. Further, if the tip side of the vine seedling 14 faces forward in the rotation direction, the seedling 14 contacts the guide roller 34 and receives resistance, so the guide roller 34 rotates and moves the tip side of the seedling 14 toward the rotating drum 13. The rotation direction is delayed to the rear, and the posture of the seedlings 14 is kept constant. Therefore, the vicinity of the base of the seedling 14 is located between the pair of left and right regulating portions 29 of the seedling loading portion 12, and is securely held so as to correspond to the claw extension hole 24.

Seedlings 14 that have passed through the pair of left and right guide plates 35
The seedlings are drawn into the seedling guide member 31, and are sent to the planting position A as the rotary drum 13 rotates while their posture is maintained by the seedling guide member 31. At the planting position A, as shown in FIG. 3, the seedlings 14 are inserted into the seedling insertion tube 26 of the seedling loading section 12 at the lower end, and the tip side is held by the lower end of the seedling guide member 31, so that the ridges 15 It is held in a substantially horizontal state close to the top surface of.

On the other hand, each time the rotating drum 13 rotates 1/8, the cams 53 and 54 rotate once around the horizontal axis 19, and as shown in FIG.
As shown in FIGS. 0 to 22, a hole 106 is made in the mulch film 18 using the punching tool 17, and the seedling 14 at the planting position A is protruded downward from the already made hole 106 using the seedling insertion claw 16 to form the ridge 15. Insert it into the soil. In this case, the first cam roller 62 is attached to the holding cam surface 5 of the first cam 53.
3a, the second cam roller 67 moves to the second
Pushed by the tensioning cam surface 54a of the cam 54, the second swinging arm 57 swings around the pivot 66 in the direction of the arrow e in FIG. It swings in the direction of the arrow, gradually pulling the rear end of the tension spring 63 backward, and increasing the spring pressure of the tension spring 63.

Then, the first cam roller 62 is connected to the first cam 5.
The lowering cam surface 53b goes beyond the holding cam surface 53a of No. 3.
When the tension spring 63 reaches the maximum spring pressure, the swing link 61 and the first cam roller 62 are moved along the lowering cam surface 53b as shown in FIG.
The swinging arm 56 suddenly swings around the pivot 58 in the direction indicated by the arrow g. This allows the seedling insertion claw 16 to be attached to the guide rail 42.
, descends linearly in the longitudinal direction while being guided by the holding rollers 43 and 44, hooks the base of the seedling 14 with the engagement recess 41 at the lower end, and bends the seedling 14 through the hole 106 of the multi-film 18.
Insert it into the soil in furrow 15 and plant.

Further, when the swing link 61 swings as shown in FIG.
5 in the direction indicated by the arrow h to lower the drilling tool 17. During this descent, the multi-film 18 is cut by the edge portion 69 of the punching tool 17, and the cut piece 18a is bent downward on the rear side by the inclined surface 70 to form the hole 106.
(see a to d in FIG. 19). Therefore, cut piece 1
Although the hole 8a remains, the hole 106 has a large effective hole diameter.
can be perforated. At this time, if the entire body runs, the punching tool 17
As shown in c and d of FIG. 19, the multi-film 18 is not caught because it swings relatively backward around the pivot 72.

The first cam roller 62 crosses the descending cam surface 53b of the first cam 53 and reaches the ascending cam surface 5 as shown in FIG.
3c, the swinging link 61 moves along the rising cam surface 53c and swings in the anti-g arrow direction against the tension spring 63. The claw 16 rises, and the drilling tool 17 also rises via the rod 76 and the third swing arm 71. At the point when the first cam roller 62 crosses the descending cam surface 53b of the first cam 53,
The second cam roller 67 is connected to the release cam surface 54 of the second cam 54.
b , the spring pressure of the tension spring 63 causes the second swing arm 57 to move in the direction of the arrow e, and the tension arm 65 to move in the direction of the arrow f.
Each swings in the direction of the arrow. Therefore, the tension spring 63 is quickly returned to the minimum spring pressure, so the first cam roller 62 quickly rides up the rising cam surface 53c of the first cam 53, and the swing link 61 is moved without receiving much resistance.
, the first swing arm 56, etc. can be returned.

If the tension spring 63 is kept at maximum tension when lowering the seedling insertion claw 16 and the boring tool 17 in this way, the seedling insertion claw 16 and the boring tool 17 can be driven into the ridge 15 with a strong force. This allows the seedling 14 to be inserted and the hole 106 to be reliably drilled. Moreover, since the spring pressure of the tension spring 63 is reduced when raising the seedling insertion claw 16 and the boring tool 17, there is no need for a large load on the cam 53. Therefore, the seedling insertion claw 16 and the boring tool 17 can be rapidly raised by increasing the change in the raising cam surface 53c.

The first cam roller 62 moves from the terminal end area of the holding cam surface 53a of the first cam 53 to the descending cam surface 53b,
When in the starting end region of the ascending cam surface 53c and the holding cam surface 53a, the first cam 53 and the second cam 54 rotate at low speed due to the eccentricity of the eccentric sprocket 91.
Even if the displacement of the descending cam surface 53b of the first cam 53 is rapidly changed, the first cam roller 62
The first cam roller 62 will not fly from the end of the holding cam surface 53a to the middle of the rising cam surface 53c. Therefore, the seedling insertion claw 16 and the boring tool 17 can be instantly moved by their entire stroke.

At this time, the second cam roller 67 rides on the tensioning cam surface 54a of the second cam 54, so that the tensioning spring 63 can be tensioned without difficulty. When the seedling insertion claw 16 is lowering, there is an obstacle such as a stone in the soil of the ridge 15.
If the tip of the seedling insertion claw 16 hits the obstacle, the seedling insertion claw 16 stops its downward movement against the tension spring 63. When the first cam roller 62 reaches the ascending cam surface 53c, it ascends from its stop position. Therefore, even if there is an obstacle, the seedling insertion claw 16 will not be bent or otherwise damaged.

In the embodiment, the rotary drum 13 is used as an example of the rotary body, but it may be composed of a belt, a chain, etc., or a plurality of support rods may be provided radially. In addition, the seedlings 14 are placed on the rotating drum 13 as shown in FIG.
Alternatively, as shown in FIG. 24, the pulleys 107, 108
A belt 109 wound therebetween may be used as a rotating body.

The transmission mechanism utilizes a chain transmission mechanism 81 using a chain 90 and an eccentric sprocket 91.
Two eccentric gears may be configured to mesh with each other. The punch 17 may be a cylindrical material whose lower end is cut diagonally. The spring 63 may be a compression spring.

[0036]

According to the present invention, the seedling insertion claw 16 for inserting the seedling 14 into the field when descending is provided so as to be movable up and down, and the swinging arm 56 for vertically moving the seedling insertion claw 16 is provided. A cam 5 is provided with a spring 63 that urges the seedling insertion claw 16 in the downward direction, and rotates around the horizontal axis 19 to swing the swing arm 56.
3, and the power transmission system 79 that drives the cam 53 is provided with a transmission mechanism 81 that lowers the rotational speed of the cam 53 when the seedling insertion claw 16 moves up and down. If there is an object, it is possible to stop the descent of the seedling insertion claw 16 against the spring 63 to prevent the seedling insertion claw 16 from breaking, and also to move the seedling insertion claw 16 up and down by the entire stroke to move the seedling 14 to a predetermined depth. can be planted in

[Brief explanation of drawings]

FIG. 1 is a left side view of the entire transplanter.

FIG. 2 is a plan view of the same.

FIG. 3 is a right side view of the planting device.

FIG. 4 is a cross-sectional view of the same plane.

FIG. 5 is a side sectional view of a rotating drum portion.

FIG. 6 is a sectional view of the seedling loading section.

FIG. 7 is a rear sectional view of the same.

FIG. 8 is a bottom view of the same.

FIG. 9 is a front view of the seedling guide portion.

FIG. 10 is a plan view of the same.

FIG. 11 is a front view of the seedling insertion nail.

FIG. 12 is a sectional view of the same.

FIG. 13 is a right side view of the front part of the planting device.

FIG. 14 is a plan view of the guide portion of the seedling insertion claw.

FIG. 15 is a side view of the power transmission system.

FIG. 16 is a cross-sectional view of the same plane.

FIG. 17 is a side view of the piercing tool.

FIG. 18 is a front view of the same.

FIG. 19 is an explanatory diagram of the drilling operation of the drilling tool.

FIG. 20 is an explanatory diagram of a planting operation.

FIG. 21 is an explanatory diagram of a planting operation.

FIG. 22 is an explanatory diagram of a planting operation.

FIG. 23 is a perspective view showing another embodiment.

FIG. 24 is a perspective view showing another embodiment.

[Explanation of symbols]

1 Machine frame 8 Movable frame 10 Rotation axis 12 Seedling loading section 13 Rotating drum 14 Vine seedlings 16 Seedling insertion nail 17　Punching tool 19 Horizontal axis 26 Seedling insertion tube 31 Seedling guide member 35 Guide plate 53 1st cam 54 Second cam 56 First swing arm 57 Second swing arm 63 Tension spring 65 Tension arm 69 Edge part 70 Inclined surface 79 Power transmission system 81 Second chain transmission mechanism 91 Eccentric sprocket

Claims (1)

[Claims] 1. A seedling insertion claw (16) for inserting the seedling (14) into the field when descending is provided so as to be movable up and down, and a swinging arm (56) for vertically moving the seedling insertion claw (16) is provided. established,
A spring (63) is provided to bias the seedling insertion claw (16) in the downward direction, and the swinging arm (56) rotates around the horizontal axis (19).
A cam (53) that swings the cam (53) is provided, and the power transmission system (79) that drives the cam (53) includes a speed change that lowers the rotational speed of the cam (53) when the seedling insertion claw (16) moves up and down. mechanism(
81) A seedling planting device for a transplanter, characterized in that it is provided with: