JP2014003947A - Planting apparatus and seedling transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the likelihood of breaking a planting tool due to unstable timing of seedling planting resulting from a large amount of soil attached around the root of a seedling scraped from a frame of a seedling receiver with a seedling picking claw.SOLUTION: A planting apparatus is provided with a rotary case attached rotatably to a frame of a planting power transmission part, and a plurality of planting bodies 27 attached rotatably to the rotary case. Each of the planting bodies has a planting body case 35, a seedling picking claw 36 attached to the planting body case for picking a seedling from a board for loading the seedling, push-out bodies 29, 37 attached to the planting body case for pushing out a seedling held in the seedling picking claw to a field, push-out body moving mechanisms 32, 33, 41 for moving the push-out bodies along the seedling picking claw, and seedling picking claw moving mechanism 39, 40, 42 for retracting the seedling picking claw along the push-out bodies.

Description

  The present invention relates to a seedling transplanter used for a rice transplanter or the like and a planting apparatus provided in the seedling transplanter.

  As a planting device that takes seedlings from a seedling mat placed on a seedling stand placed behind a seedling transplanting machine such as a riding rice transplanter, it rotates around the planting drive shaft in the horizontal direction as the center of rotation. Place seedling planting tools with seedling picking nails and push-out nails at both ends of the left and right rotary cases, and let the tip of the seedling planting tool project to the rotating outer periphery of the rotary case while the rotary case is rotating. In addition, a technique for separating seedlings and performing planting operations by drawing a substantially elliptical planting locus line is known (see, for example, Patent Document 1 and Patent Document 2).

  The planting apparatus of patent document 1 and patent document 2 is equipped with two seedling planting tools which take a seedling while rotating with rotation of a rotary case, and plant a seedling in a farm field.

  FIG. 13: shows the left view of the planting apparatus of the riding type rice transplanter in patent document 2, and FIG. 14 shows the side view of the rotary case part of the planting apparatus. In FIG. 13 and FIG. 14, the left side indicates the front of the riding type rice transplanter.

  A planting drive shaft 201 in the left-right direction is mounted on the rear portion of the planting transmission case 200 and is rotated. The center portions of the left and right rotary cases 202 are fixed to both end portions of the planting drive shaft 201, and the left and right rotary cases 202 rotate together with the planting drive shaft 201.

  In addition, the planting tool case 210 of the seedling planting tool 203 is mounted on the outer side at both ends of the rotary case 202 with the planting tool rotation shaft 208 mounted thereon.

  As shown in FIG. 14, a non-rotating eccentric sun gear 205 fixed to the planting transmission case 200 is provided in the outer periphery of the planting drive shaft 201 in the rotary case 202. Further, an eccentric planetary gear 207 that rotates integrally with the planting tool rotating shaft 208 is provided, and an eccentric sun gear 205 and an eccentric planetary gear 207 are arranged between the eccentric sun gear 205 and the eccentric planetary gear 207 so as to mesh with these gears. A core counter gear 206 is mounted on the counter gear shaft 209.

  In FIG. 13 and FIG. 14 showing the left side surface of the riding type rice transplanter, the rotary case 202 rotates counterclockwise about the planting drive shaft 201. When the rotary case 202 rotates counterclockwise, the two planting tool rotation shafts 208 revolve counterclockwise around the planting drive shaft 201, and the eccentric planetary gear 207 passes through the eccentric counter gear 206. By engaging with the eccentric sun gear 205, each planting drive shaft 201 rotates clockwise, and as a result, the tips of the seedling catching claws 211 fixed to the planting tool cases 210 of the two seedling planting tools 203. Move in a configuration in which the planting tool locus 204 is drawn.

  Then, when the seedling picking claws 211 scrape a predetermined amount of seedlings from the seedling receiving frame 213 at the lower end of the seedling stand and enter the soil, the pushing claws 212 that push out the seedlings held by the seedling picking claws 211 are operated almost simultaneously. The seedling is pushed out and the seedling is planted in the field.

JP 2007-089515 A JP 2001-299029 A

  However, in the configuration of the conventional planting apparatus described above, if a large amount of soil is attached around the root of the seedling that the seedling catching claw 211 has scraped from the seedling receiving frame 213, the planting timing of the seedling becomes unstable. The planting tool could be damaged.

  This problem will be described below.

  In the conventional seedling planting tool 203, since the seedling removing claws 211 are fixed to the planting tool case 210, the static locus drawn by the tips of the seedling harvesting claws 211 of the two seedling planting tools 203 is shown in FIG. As shown, the planting tool trajectory 204 is substantially constant, but when one seedling planting tool 203 is taking a seedling and descending, the other seedling planting tool 203 is raised when planting a seedling and ascending. The tip of the side seedling catching claw 211 is a locus that is closest to the rear part of the descending seedling planting tool 203.

  FIGS. 15A to 15D are views showing the positional relationship between two seedling planting tools 203 attached to the rotary case 202. FIG. FIGS. 15A to 15D are views as seen from the left side of the traveling vehicle body. As shown in FIG. 15E, the shape and posture of the seedling planting tool 203 are set as shown in FIG. The tip of the claw 211 and the center of the planting tool rotation shaft 208 are represented by triangles.

  15A is a position when the seedling 215 held by one seedling planting tool 203 is planted, and FIG. 15B is a diagram when the other seedling planting tool 203 takes a seedling from the seedling receiving frame 213. FIG. 15C shows the position after the other seedling planting tool 203 has taken the seedling 215 from the seedling receiving frame 213, and FIG. 15D shows the other seedling planting tool 203 holding the seedling 215. 15 shows the positions when they are slightly lowered from FIG. 15 (c), the rotary case 202 rotates counterclockwise, and the two seedling planting tools 203 move in the order of FIGS. 15 (a) to 15 (d). To do.

  The planting tool rotation shafts 208 to which the planting tool cases 210 of the two seedling planting tools 203 are fixed revolve in a configuration that draws on the rotation shaft locus 214 in a side view.

  When a lot of soil is attached around the root of the seedling scraped off from the seedling receiving frame 213, the pushing claw 212 cannot push out the seedling 215 held by the seedling removing claw 211 at the time of planting in FIG. As shown in FIG. 15 (b), the soil 216 attached around the root of the seedling 215 after planting remains attached to the seedling picking claw 211.

  Then, as shown in FIG. 15 (c), the other seedling planting tool 203 descends while holding the next seedling 215, and one seedling planting is performed with the soil 216 attached to the seedling picking claws 211. The tool 203 rises.

  Thereafter, at the position shown in FIG. 15 (d), the tip of the seedling catching claw 211 of one seedling planting tool 203 comes closest to the rear part of the other seedling planting tool 203, and If the soil 216 is adhered, the soil 216 comes into contact with the rear portion of the other seedling planting tool 203.

  If the soil 216 attached to the tip of the seedling catching nail 211 contacts the other seedling planting tool 203, it may cause the rotation to stop or the rotation trajectory to be disturbed. The front-to-back distance is disturbed, the work is interrupted, and the work efficiency is lowered.

  Further, the seedling planting tool 203 or the planting device may be damaged due to a load at the time of contact with the other seedling planting tool 203.

  Further, if a large amount of soil adheres around the root of the seedling that the seedling removing claw 211 has scraped from the seedling receiving frame 213, the pushing claw 212 does not completely push out the seedling, and the seedling 215 is caught between the seedling removing claws 211. There are times when you can continue working. At this time, a missing part where a seedling cannot be planted is generated, and an operator needs to manually plant the seedling, resulting in a problem that labor is increased.

  In addition, when the seedling picking claws 211 with the seedlings sandwiched next try to take seedlings from the seedling receiving frame 213, the sandwiched seedlings prevent the seedlings from being picked up, resulting in a continuous lack of stock. There is also an increasing problem.

  An object of the present invention is to provide a planting apparatus and a seedling transplanter that can stabilize the seedling planting timing and prevent the planting tool from being damaged in consideration of the problems of the conventional planting apparatus.

  The above-mentioned problem of the present invention is solved by the following means.

The first aspect of the present invention is
A planting device (23) for taking a seedling placed on a seedling stand (22) mounted so as to be movable up and down behind the traveling vehicle body (10) and planting it in a farm field,
A rotary case (31) rotatably attached to the planting transmission frame (21);
A plurality of planted bodies (27) rotatably attached to the rotary case (31);
The planted body (27)
Planting case (35),
A seedling removing claw (36) attached to the planted case (35) and taking the seedling from the seedling mount (22);
Extrudates (29, 37) that are attached to the planted body case (35) and push the seedlings held by the seedling picking claws (36) to the field,
An extrudate moving mechanism (32, 33, 41) for moving the extrudate (29, 37) along the seedling claw;
The planting apparatus has a seedling removing claw moving mechanism (39, 40, 42) for retracting the seedling removing claw (36) along the extruded body (29, 37).

The second aspect of the present invention is
A rotary shaft (34) is rotatably attached to the rotary case (31),
The planted case (35) is fixed to the rotating shaft (34),
The extrudates (29, 37) are held movably along the seedling claw (36) in the planted case (35),
The extrudate moving mechanism (32, 33, 41)
One end is connected to the extruded body (29), and the extruded arm (32) is rotatably attached to the planted body case (35).
An extrusion cam (33) in contact with the other end of the extrusion arm (32) and fixed to the rotary case (31);
An extrusion body biasing spring (41) for biasing the extrusion arm (32) in a direction in which the extrusion body (29, 37) moves forward;
The push arm (32) moves the push body (29, 37) backward against the push body biasing spring (41) by contact with the push cam (33).
The seedling claw (36) is held by the planted body case (35) so as to be movable along the extruded body (29, 37).
The seedling claw moving mechanism (39, 40, 42)
One end is connected to the seedling picking claw (36), and a seedling picking arm (39) rotatably attached to the planting case (35),
A seedling cam (40) that contacts the other end of the seedling arm (39) and is fixed to the rotary case (31);
A seedling catching claw biasing spring (42) that biases the seedling catching arm (39) in a direction in which the seedling catching claw (36) moves backward,
The seedling picking arm (39) advances the seedling picking claw (36) against the seedling picking claw biasing spring (42) by contact with the seedling picking cam (40). It is the planting apparatus of 1 of this invention.

The third aspect of the present invention
The extrudate moving mechanism (32, 33, 41) and the seedling removing claw moving mechanism (39, 40, 42) are arranged in the planted body case (35),
The seedling removal cam (40) is disposed closer to the rotary case (31) than the extrusion cam (33),
The seedling arm (39) is disposed closer to the rotary case (31) than the push arm (32),
In the planting apparatus according to the second aspect of the present invention, the seedling claw urging spring (42) is disposed between the seedling claw (36) and the extruded body (29). is there.

The fourth aspect of the present invention is
The seedling claw moving mechanism (39, 40, 42)
After the planted body (27) has planted the seedling taken by the seedling picking nail (36) to the field, the seedling picking nail is taken until the next seedling is taken from the seedling placing stand (22). (36) is shaped so that the seedling-taking cam (40) is not in contact with the seedling-taking arm (39) so as to move backward.
The third aspect of the present invention is characterized in that when the planted body (27) comes to a position for picking the next seedling from the seedling placing stand (22), the seedling picking claw (36) is moved forward. Planting device.

The fifth aspect of the present invention is
The seedling removing claw moving mechanism (39, 40, 42) is arranged at a timing before the extrudate moving mechanism (32, 33, 41) moves the extrudate (29, 37) backward. It is the planting apparatus of any one of the first to fourth aspects of the present invention, characterized in that the claw (36) is moved rearward.

The sixth aspect of the present invention
The seedling-claw moving mechanism (39, 40, 44) is configured to plant the seedling held by the seedling-claw claw (36) until the tip of the seedling-claw claw (36) comes out of the field. The planting device according to any one of the first to fifth aspects of the present invention is characterized in that the seedling picking claws (36) are temporarily moved backward in the meantime.

The seventh aspect of the present invention
A seedling stand (22) mounted behind the traveling vehicle body (10);
A seedling stand having a rotary case (31) rotatably attached to the planting transmission part frame (21) and a planting body (27) rotatably attached to the rotary case (31); A planting device (23) for taking the seedlings placed in (22) and planting them in a field;
In conjunction with the turning operation of the traveling vehicle body (10), the raising and lowering the seedling platform (22), and turning on and off the driving of the planting device (23),
A potentiometer for detecting the angle of the rotary case (31),
Based on the angle detected by the potentiometer, the turning interlocking mechanism is such that the position of the planted body (27) when the planting device (23) is stopped is the planted body (27) at the time of seedling planting. If it is determined that the distance from the position is more than a predetermined distance, the planting device (27) is more than the case where the distance from the position of the planted body (27) at the time of planting the seedling is less than the predetermined distance. The seedling transplanting machine is characterized in that the planting start timing according to 23) is controlled to be advanced.

  According to the first aspect of the present invention, the seedling catching claw moving mechanism (39, 40, 42) moves the seedling catching claw (36) backward at a predetermined position so that the tip end side of the seedling catching claw (36) is another planted body. Since it can move away from the locus | trajectory (19) of (27), the seedling planting timing without the seedling and soil which are pinched | interposed into the seedling picking nail | claw (36) does not contact another planting body (27). Is stabilized, and the planted body (27) is prevented from being damaged.

  Further, as the planted body (27) is rotated, the seedling removing claw moving mechanism (39, 40, 42) advances the seedling removing claw (36) at a predetermined position, so that the planted body (27) is moved forward. Since a rotational load can be applied, the planted body (27) is prevented from pulsating and failing to scrape off the seedling, so that the seedling is reliably planted in the field, and the operator does not need to replant the seedling. Become.

  According to the second aspect of the present invention, in addition to the effects of the first aspect of the present invention, the seedling removing claw moving mechanism (39, 40, 42) and the pusher moving mechanism (32, 33, 41) are both planted case (35). ), The movement of the extruded body (29, 37) and the movement of the seedling claw (36) can be synchronized with the operation of the rotating shaft (34). Improvement of seedling planting accuracy and prevention of pulsation can be achieved without a significant increase.

  According to the third aspect of the present invention, since the seedling arm (39) and the extrusion arm (32) can be arranged without crossing each other, the seedling arm (39) and the extrusion arm (32) have a complicated shape. In addition, it is not necessary to form a place where the seedling arm (39) and the extrusion arm (32) intersect in the planted body case (35), and a simple and compact configuration can be obtained. Interference between (27) and the seedling picking nail (36) is prevented, and maintainability is improved.

  In addition, by arranging the seedling claw urging spring (42) between the seedling claw (36) and the extruded body (29), an arrangement utilizing the space in the planted case (35) is used. Therefore, it is possible to prevent the planted body (27) from interfering with each other without increasing the number of protrusions in the planted body case (35).

  According to the fourth aspect of the present invention, the seedling-taking cam (40) is provided so that the seedling-taking cam (40) and the seedling-taking arm (39) are not in contact with each other after the seedling is planted and before the next seedling is taken. Thus, since the tip of the seedling catching nail (36) can be retracted during this time, the seedling catching nail (36) is prevented from coming into contact with another planting body (27), and the planting body (27 ) Is disturbed and the planting timing of the seedling is disturbed and the planting accuracy is prevented from being lowered, and the constituent members of the seedling picking nail (36) and the planted body (27) may be damaged by contact load. Is prevented.

  In addition, when the seedling picking claw (36) passes through the seedling picking port 25 and picks up the seedling, the seedling picking cam (40) and the seedling picking arm (39) are in contact with each other. Can generate rotational torque by pushing against the urging force of the seedling picking claw urging spring (42), so that the planted body (27) is prevented from causing pulsation, and the seedling is securely taken. It can be planted in the field and the seedling planting accuracy is improved.

  According to the fifth aspect of the present invention, the amount of forward and backward movement of the seedling picking nail (36) is made smaller than the amount of forward and backward movement of the extruded body (29, 37), so that the extruded body (37) comes into contact with the seedling picking nail (36). Since the range to be extended can be lengthened, seedlings can be pushed out reliably, the occurrence of missing plants and the planting of seedlings over the set amount can be prevented, the growth of seedlings can be made uniform, and the seedling picking nail (36) The mud adhering to the water can be scraped off, and it is possible to prevent the seedling from being missed by the mud.

  According to the sixth aspect of the present invention, the tip trajectory of the seedling catching nail (36) becomes substantially vertical with respect to the field scene by temporarily retracting the seedling catching nail (36) during seedling planting. Since the hole formed in the field when the nail (36) plants the seedling can be made small, the planted seedling is prevented from falling and the growth of the seedling is stabilized.

  According to the seventh aspect of the present invention, by changing the operation timing of the planting device (23) after turning in accordance with the posture of the planting device (23) when stopped, the occurrence of a shift in the planting start timing is more reliably generated. Since it can prevent, the planting precision of a seedling improves.

Left side view of a riding type rice transplanter according to an embodiment of the present invention The top view of the riding type rice transplanter of embodiment of this invention Sectional drawing of the seedling planting tool of embodiment of this invention Sectional front view of the seedling planting apparatus according to an embodiment of the present invention (A)-(d) The figure which shows the positional relationship of a seedling picking nail | claw and an extrusion nail | claw when a planting rotation axis exists in each predetermined position of a rotary case in embodiment of this invention. (A) to (d) In the embodiment of the present invention, when the moving distance in the front-rear direction of the seedling picking nail is larger than the moving distance in the front-rear direction of the push-out nail, the planting rotation axis is a predetermined value of the rotary case. The figure which shows the positional relationship of the seedling removal nail | claw when it exists in each position of this, and an extrusion nail | claw Sectional drawing of the seedling planting tool of the other structure of embodiment of this invention (A) The figure which showed the static locus | trajectory of the seedling planting tool tip of embodiment of this invention, (b) The figure which showed the movement locus | trajectory of the seedling planting tool tip of embodiment of this invention (A) The partial cross section front view of the seedling planting apparatus which provided the reverse rotation movable mechanism of embodiment of this invention, (b) The planting rotation axis | shaft which provided the reverse rotation movable mechanism of embodiment of this invention Sectional drawing of a part, (c), (d) The figure explaining reverse rotation control operation | movement of an extrusion cam of embodiment of this invention (A), (b) The figure which shows the position of two seedling planting tools when the seedling planting apparatus of embodiment of this invention has stopped (A) Side sectional view of HST of riding type rice transplanter of embodiment of the present invention, (b) Flat sectional view of HST of riding type rice transplanter of embodiment of the present invention (A) Enlarged sectional view of the cylinder block portion of the HST of the embodiment of the present invention, (b) Sectional view of the cylinder block of the HST of the embodiment of the present invention, (c) Sectional view of the cylinder block of the conventional HST Left side view of a conventional seedling planting device for a riding rice transplanter Side view of the rotary case of a conventional seedling planting device for a riding rice transplanter (A)-(d) The figure which shows the positional relationship of two seedling planting tools when the rotary case of the seedling planting apparatus of the conventional riding type rice transplanter rotates, (e) The shape and attitude | position of a seedling planting tool Schematic representation of

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

(Embodiment)
1 and 2 show a left side view and a plan view of a riding type rice transplanter equipped with a seedling planting apparatus according to an embodiment of the present invention.

  This riding type rice transplanter is equipped with an engine 11 and is planted with six-row seedlings via a lifting link device 14 behind a traveling vehicle body 10 having a pair of left and right front wheels 12 and rear wheels 13 that are driven and rotated. The part 15 is connected.

  Further, the traveling vehicle body 10 is provided with a driver seat 16, a steering handle 17 that steers the front wheels 12, and a spare seedling table 18 on which spare seedlings are placed.

  In the present specification, the front / rear and left / right direction reference defines the front / rear and left / right reference based on the traveling direction of the vehicle body as viewed from the driver seat 16.

  The seedling planting section 15 is provided with a seedling mounting table 22 inclined in a configuration in which the front part is higher on the upper side of the planting transmission case 21 input by transmission from the machine body, and the planting transmission section of the planting transmission case 21 One set of seedling planting devices 23 is provided for every two strips at the rear end.

  When the traveling vehicle body 10 is advanced with the center float 24 and the side float 26 in contact with the ground, the seedling stage 22 reciprocates left and right and the mat seedling on the stage is provided on the lower end side of the seedling stage 22. One stock is sequentially supplied to 20 seedling collection ports 25, and the seedling planting device 23 separates them and takes them out and plant them in the field.

  Next, the structure of the seedling planting apparatus 23 of this Embodiment is demonstrated.

  The configuration of the seedling planting device 23 of the present embodiment is the same as that of the conventional planting device shown in FIG. 13, and the structure of the seedling planting tool 27 mounted on the rotary case is the same as that of the conventional seedling planting device. Different from the structure of the planting tool 203.

  FIG. 3 shows a cross-sectional side view of the seedling planting tool 27 of the present embodiment as viewed from the left side of the traveling vehicle body 10, and FIG. 4 shows a partial cross-sectional front view of the seedling planting tool 27.

  In the seedling planting device 23 of the present embodiment, a planting drive shaft is rotatably supported at the rear end portion of the planting transmission case 21, and the center of the rotary case 31 is positioned at the left and right projecting portions of the planting drive shaft. The parts are fixedly attached in a configuration that rotates integrally.

  Further, a planting rotation shaft 34 is rotatably supported at both ends of the rotary case 31, and a planting tool case 35 of the seedling planting tool 27 is fixed to each of the two planting rotation shafts 34. It is attached.

  The planting tool case 35 is provided with a seedling picking claw 36 and an extrusion rod 29 having a pushing claw 37 fixed to the tip thereof so as to be movable in the front-rear direction.

  In the left side view shown in FIG. 1, when the rotary case 31 rotates counterclockwise together with the planting drive shaft, the planting rotation shaft 34 revolves counterclockwise around the planting drive shaft and rotates clockwise. .

  Since the seedling planting tool 27 rotates together with the planting rotation shaft 34 to which the planting tool case 35 is fixed, as the planting drive shaft rotates, the seedling planting tool 27 removes the seedlings. The tip of the nail 36 moves in a configuration in which the seedling planting tool tip locus 19 is drawn. While the planting rotation shaft 34 revolves once, the tip of the seedling picking claw 36 makes a round on the seedling planting tool tip locus 19.

  The seedling planting tool tip locus 19 is a static locus viewed from the left side when the traveling vehicle body 10 is stopped.

  The seedling planting device 23 corresponds to an example of the planting device of the present invention. The planting transmission case 21 corresponds to an example of the planting transmission part frame of the present invention. The planting rotation shaft 34 corresponds to an example of the rotation shaft of the present invention. Moreover, the seedling planting tool 27 corresponds to an example of the planted body of the present invention, and a configuration in which the extruded rod 29 and the extruded claw 37 are combined corresponds to an example of the extruded body of the present invention. The planting tool case 35 corresponds to an example of the planting body case of the present invention.

  The pusher claw 37 of the seedling planting tool 27 is attached to the tip of the pusher rod 29 slidably supported by the planting tool case 35 so as to be close to the back surface of the seedling picking claw 36. The seedling catching claw 36 protrudes toward the tip side and the seedling catching claw 36 is retracted toward the root side. The push rod 29 is moved back and forth by the push body moving mechanism accommodated in the planting tool case 35, and the push claw 37 moves in the front and rear direction along the back surface of the seedling picking claw 36.

  In addition, the seedling picking claw 36 is also moved back and forth by the seedling picking claw moving mechanism housed in the planting tool case 35, and the seedling picking claw 36 moves in the front-back direction along the push-out claw 37.

  Next, the details of the extrudate moving mechanism and the seedling removing claw moving mechanism housed in the planting tool case 35 of the seedling planting tool 27 will be described.

  The push-out cam 33 and the seedling-removing cam 40 are integrally fitted to the projecting portion of the rotary case 31 projecting into the planting tool case 35, and freely rotatable with respect to the planting rotation shaft 34 and the planting tool case 35. Is provided. As shown in FIG. 4, the seedling collecting cam 40 is disposed closer to the rotary case 31 than the push cam 33.

  One end of the pusher arm 32 is connected to the end of the push rod 29 inside the planter case 35 via the push rod connecting member 43, and the other end is slidably contacted with the outer peripheral surface of the push cam 33. It is pivotally supported.

  The push rod 29 is urged toward the protruding side of the seedling picking claw 36 via the push rod connecting member 43, that is, the push claw 37 is urged in the direction of moving forward, and the middle of the push arm 32. An extrusion spring 41 that biases the part is provided.

  The extrusion cam 33 rotates relative to the planting rotation shaft 34 as a reference, and the end portion of the extrusion arm 32 slidably contacting the outer circumferential surface of the extrusion cam 33 moves corresponding to the shape of the outer circumferential surface of the extrusion cam 33. The push arm 32 swings around the arm shaft 30.

  When the push arm 32 is at a position where the push spring 41 is compressed, the push pawl 37 is in a retracted state. When the push-out arm 32 rotates from that position and the compression of the push-out spring 41 is relaxed, the push-out rod 29 is pushed out by the elastic force of the push-out spring 41, and the push-out pawl 37 protrudes.

  The outer peripheral shape of the push cam 33 may be a shape in which the end of the push arm 32 is in contact with the outer peripheral surface of the push cam 33 at a position where the push pawl 37 is projected by the elastic force of the push spring 41. It is good also as a shape where the edge part of 32 does not contact | connect the outer peripheral surface of the extrusion cam 33. FIG.

  In this way, the pusher arm 32, the push cam 33, and the push spring 41 constitute an extrudate moving mechanism.

  The pushing spring 41 corresponds to an example of the pushing body biasing spring of the present invention.

  One end of the seedling catching claw 36 is connected to the end of the seedling catching claw 36 on the inner side of the planting tool case 35, and the other end is slidably in contact with the outer peripheral surface of the seedling catching cam 40. The shaft 30 is rotatably supported. As shown in FIG. 4, the seedling collecting arm 39 is disposed closer to the rotary case 31 than the pushing arm 32.

  And it is the structure urged | biased in the direction which pulls the seedling picking nail | claw 36 into the planting tool case 35 through the seedling picking nail | claw connection member 38, ie, the structure urged | biased in the direction which moves the seedling picking nail | claw 36 back. A seedling-removing spring 42 that biases the upper portion of the seedling-removing arm 39 is provided. As shown in FIG. 3, the seedling removal spring 42 is disposed above the extrusion rod 29, that is, between the seedling removal claw 36 and the extrusion rod 29.

  The end of the seedling-taking arm 39 that is slidably contacted with the outer peripheral surface of the seedling-removing cam 40 corresponding to the shape of the outer peripheral surface of the seedling-removing cam 40 by rotating the seedling-removing cam 40 relative to the planting rotation shaft 34. The part moves, and the seedling collecting arm 39 swings around the arm shaft 30.

  When the seedling collecting arm 39 is in a position where the seedling collecting spring 42 is compressed, the seedling collecting claws 36 are in a state of extending forward. When the seedling collecting arm 39 is rotated from that position and the compression of the seedling collecting spring 42 is relaxed, the seedling collecting claw 36 is drawn by the elastic force of the seedling collecting spring 42 and the tip of the seedling collecting claw 36 is retracted. To do.

  When the seedling is taken out from the seedling collecting opening 25 at the lower part of the seedling placing stand 22, the seedling is taken with the seedling removing claw 36 protruding forward, but the outer peripheral surface of the seedling collecting cam 40 against the seedling removing spring 42. The seedling picking claws 36 are moved forward by the pressing force from the seedling collecting arm 39 to the seedling collecting arm 39, so that the seedling can be surely taken against the resistance force received from the seedling when taking the seedling. If the seedling collecting spring 42 is configured to be biased in a direction in which the seedling removing claws 36 are moved forward, the seedling removing claws 36 are pushed by resistance from the seedlings when the seedlings are taken, and the seedlings cannot be reliably removed. There is a fear.

  The outer peripheral shape of the seedling collecting cam 40 may be a shape in which the end portion of the seedling collecting arm 39 is in contact with the outer peripheral surface of the seedling collecting cam 40 at a position where the seedling removing claw 36 is pulled by the elastic force of the seedling collecting spring 42. However, the end of the seedling collecting arm 39 may not be in contact with the outer peripheral surface of the seedling collecting cam 40.

  As described above, the seedling removal arm 39, the seedling removal cam 40, and the seedling removal spring 42 constitute a seedling removal claw moving mechanism.

  The seedling removing spring 42 corresponds to an example of the seedling removing claw urging spring of the present invention.

  Since the push rod 29 moves back and forth in accordance with the outer peripheral shape of the push cam 33, the push pawl 37 can be placed at an arbitrary position on the revolution trajectory of the planting rotation shaft 34 by designing the outer push shape of the push cam 33. Can be moved back and forth.

  Similarly, since the seedling picking claws 36 move back and forth in accordance with the outer peripheral shape of the seedling collecting cam 40, the design of the outer peripheral shape of the seedling collecting cam 40 allows any arbitrary on the revolution trajectory of the planting rotation shaft 34. At the position, the seedling picking claw 36 can be moved back and forth.

  Further, the extrusion cam 33 and the seedling removal cam 40 are integrally fitted to the same projecting portion of the rotary case 31 and are disposed at a position centered on the axis of the planting rotation shaft 34. Corresponding to the revolving movement of the rotating shaft 34, the forward and backward movement of the pushing claw 37 and the forward and backward movement of the seedling claw 36 operate in synchronization.

  As shown in FIG. 15 (d), the outer shape of the seedling removal cam 40 is set so that the tip of the seedling removal claw 36 of one seedling planting tool 27 is closest to the rear part of the other seedling planting tool 27. Since the distance between the tip of the seedling catching nail 36 and the rear portion of the other seedling planting tool 27 can be increased by making the shape of the catching nail 36 retracted, the tip of the seedling catching nail 36 adhered without being planted normally. It is possible to prevent the remaining seedling or soil from coming into contact with the other seedling planting tool 27, and to stabilize the planting timing and planting posture.

  For example, the shape of the outer periphery of the seedling collecting cam 40 is configured so as not to contact the end of the seedling collecting arm 39 until the next seedling is taken from the seedling collecting opening 25 after the seedling is planted in the field. It is good also as a state which pulled in seedling picking nail 36.

  Further, the outer peripheral shape of the seedling removal cam 40 is kept in a state in which the seedling removal claw 36 is pulled in until the next seedling is taken out from the seedling removal opening 25, and the seedling removal claw 36 is projected when the next seedling is taken out from the seedling removal opening 25. With the shape, the seedling picking claws 36 can surely pick seedlings with the force that moves forward, and the seedling planting tool 27 can be prevented from pulsating.

  5A to 5D show the positional relationship between the seedling picking claws 36 and the pushing claws 37 when the planting rotation shaft 34 is located at each predetermined position of the rotary case 31. FIG.

  FIG. 5 (a) shows the time until the seedling picking nail 36 holds the seedling taken from the seedling outlet 25 and plantes it in the field. FIG. 5 (b) shows the case where the seedling is planted in the field. The positional relationship of the seedling picking claw 36, the extrusion rod 29, and the extrusion claw 37 after planting the seedling in the field is shown. FIG. 5C shows the positional relationship between the seedling picking claw 36, the pushing rod 29 and the pushing claw 37 from when the seedling shown in FIG. 5B is planted until the pushing claw 37 shown in FIG. Is shown. In FIG.5 (c) and FIG.5 (d), the position when the seedling picking nail | claw 36 and the extrusion nail | claw 37 protrude ahead is shown with the broken line.

  Until the seedling is taken from the seedling outlet 25 and the seedling held by the seedling picking claw 36 is planted in the field, the seedling picking claw 36 is in a position protruding forward as shown in FIG. Is pulled in and the push-out pawl 37 is in the retracted position. At this time, the seedling is mainly held by a portion in front of the pushing claw 37 of the seedling picking claw 36.

  And when accepting seedlings, as shown in FIG. 5 (b), the pushing rod 29 moves forward, so that the pushing claws 37 push the seedlings held by the seedling picking claws 36 forward, and the seedlings Is planted.

  After planting the seedlings, as shown in FIG. 5 (d), the push rod 29 is drawn and the push claws 37 move backward.

  In the present embodiment, after the seedling is planted, the seedling claw 36 is moved backward as shown in FIG. 5C at a timing before the pushing claw 37 moves backward.

  By moving the seedling-removing claw 36 rearward before the push-out claw 37 moves backward, the seedlings and soil are still sandwiched between the seedling-removing nails 36 without being properly planted. Even at that time, the seedling and soil can be removed, and the state where the seedling and soil are sandwiched between the seedling picking claws 36 can be prevented.

  By preventing the seedling nail 36 from holding the seedling or soil, there is no place where seedlings cannot be planted or where many seedlings are planted. Occurrence can be prevented.

  In addition, by moving the seedling picking claw 36 backward before the pushing claw 37 moves backward, even when mud in the field adheres to the tip of the seedling planting tool 27, the attached mud is removed. Can be removed.

  In the configuration shown in FIGS. 5A to 5D, the seedling picking nail 36 is moved backward at a timing before the pushing claw 37 moves backward. Even if the moving distance in the direction is made larger than the moving distance in the front-rear direction of the push-out claw 37, the same effect can be obtained.

  6 (a) to 6 (d), the planting rotation shaft 34 when the moving distance in the front-rear direction of the seedling picking claw 36 is larger than the moving distance in the front-rear direction of the push-out claw 37. Shows the positional relationship between the seedling picking nail 36 and the push-out nail 37 when each is at a predetermined position of the rotary case 31.

  FIG. 6 (a) shows how the seedling picking nail 36 holds the seedling taken from the seedling outlet 25 and plantes it in the field, while FIG. 6 (b) shows when seedling is planted in the field, FIG. The positional relationship of the seedling picking claw 36, the extrusion rod 29, and the extrusion claw 37 after planting the seedling in the field is shown. FIG. 6D shows the positional relationship between the seedling removing claw 36, the pushing rod 29 and the pushing claw 37 after the drawing claw 36 is drawn after the pushing claw 37 is drawn in FIG. 6C. Show. In FIG.6 (c) and FIG.6 (d), the position when the seedling picking nail | claw 36 and the extrusion nail | claw 37 protrude ahead is shown with the broken line.

  As shown in FIG. 6D, the movable distance L <b> 2 in the front-rear direction of the seedling picking claw 36 is made larger than the movable distance L <b> 1 in the front-rear direction of the push-out claw 37.

  When the seedling picking nail 36 moves rearward, the tip of the seedling picking nail 36 is drawn to a position behind the tip of the push-out nail 37. Even when the soil remains sandwiched, the seedling and soil are removed when the seedling picking nail 36 moves backward, and the seedling and soiling nail 36 is prevented from being sandwiched. be able to.

  Also, when mud in the field is attached to the tip of the seedling planting tool 27, the attached mud is removed when the seedling picking claw 36 moves backward.

  In FIG. 7, the partial cross section side view seen from the left side of the traveling vehicle body 10 of the seedling planting tool 27 of another structure of this Embodiment is shown. It differs from the seedling planting tool 27 shown in FIG.

  The seedling collecting cam 44 with a recess of the seedling planting tool 27 shown in FIG. 7 is formed with a recess 45 whose radius is temporarily reduced at the front portion where the radius of the outer peripheral portion is reduced.

  The seedling picking claw 36 moves back and forth corresponding to the shape of the seedling collecting cam 44 with a recess. When the end portion of the seedling collecting arm 39 is in contact with the portion of the seedling collecting cam 44 with a concave portion having a large radius, the seedling removing claw 36 moves forward, and the end portion of the seedling collecting arm 39 has the concave portion. The seedling catching claw 36 moves backward when it is in contact with a portion having a small radius or when it is not in contact with the seedling removal cam 44 with a recess.

  In the case of the seedling collecting cam 40 shown in FIG. 3, when the seedling is planted and the tip of the seedling collecting claw 36 moves upward from the top of the field, the contact portion of the end portion of the seedling collecting arm 39 is the radius of the seedling collecting cam 40. Passes through the portion where becomes smaller, and the seedling picking claw 36 is pulled backward.

  In the case of the seedling removal cam 44 with a recess shown in FIG. 7, since the recess 45 is formed in the front portion where the radius becomes small, when the contact portion of the end portion of the seedling taking arm 39 passes through the recess 45, The seedling claw 36 is temporarily pulled backward.

  FIG. 8A shows a static locus drawn by the tip of the seedling planting tool 27, that is, the tip of the seedling catching claw 36 when the planting transmission case 21 is operated when the traveling vehicle body 10 is stopped. ing.

  The seedling planting tool tip locus 19 shows a static locus in which the tip of the seedling planting tool 27 moves when the seedling removal cam 40 is used, and the seedling planting tool second tip locus 46 is a seedling collection cam 44 with a recess. The static locus | trajectory to which the front-end | tip of the seedling planting tool 27 when using is moved is shown. Further, the revolution locus of the planting rotation shaft is indicated by reference numeral 47.

  Further, in FIG. 8B, in response to the tip locus of the seedling planting tool when the traveling vehicle body 10 is stopped, the seedling picking nail 36 of the seedling planting tool 27 when the traveling vehicle body 10 is traveling. It shows the movement trajectory drawn by the tip.

  A seedling planting tool tip movement locus 48 indicates a movement locus when the tip of the seedling planting tool 27 moves when the seedling removal cam 40 is used, and a seedling planting tool second tip movement locus 49 is a seedling removal with a recess. The movement locus | trajectory to which the front-end | tip of the seedling planting tool 27 moves when the cam 44 is used is shown.

  The position 30 mm vertically above the position of the lowest point of the locus of the tip of the seedling picking claw 36 is assumed to be a field scene.

  The concave portion 45 of the seedling collecting cam 44 with a concave portion is configured such that the contact portion of the end portion of the seedling collecting arm 39 passes immediately before the tip of the seedling collecting claw 36 reaches the field scene, and FIG. 8 (a) and FIG. As shown in (b), immediately before reaching the farm scene, the tip of the seedling picking claw 36 is temporarily pulled backward to enter the field, and at the lowest point of the locus of the tip of the seedling picking claw 36, the seedling The tip of the catch claw 36 returns to the position where it protrudes forward.

  By temporarily retracting the tip of the seedling picking claw 36 by the seedling collecting cam 44 with a recess, the digging hole at the time of seedling planting can be made small.

  The hatched portion in FIG. 8B shows a portion of a digging hole that is smaller than when the seedling removal cam 40 is used by using the seedling removal cam 44 with a recess.

  Thus, when the tip of the seedling catching nail 36 passes through the field surface, the seedling catching nail 36 is temporarily retracted, whereby the digging hole in the soil can be reduced, which is suitable for dense planting.

  Moreover, you may provide a reverse possible mechanism in the extrusion cam 33 of the seedling planting tool 27 of FIG.3 and FIG.7.

  A configuration example in which the reverse cam mechanism of the push cam 33 is provided will be described with reference to FIGS. 9 (a) to 9 (d).

  FIG. 9A shows a partial cross-sectional front view of the seedling planting device 23 having a structure in which the reverse rotation mechanism of the push cam 33 is provided, and FIG. 9B is a cross-sectional view of the planting rotation shaft 34 portion. Is shown. FIG. 9C and FIG. 9D are diagrams for explaining the reverse rotation restricting operation of the push cam 33, and shows the relationship between the planting rotation shaft 34 and the rotary case 31 as viewed from the side of the vehicle body. FIG. 9C illustrates the shaft support plate 61 with the shaft support plate 61 omitted, and FIG. 9D illustrates a state in which the shaft support plate 61 is fitted in the plate receiving groove 62.

  The planting rotation shaft 34 is a hollow shaft, and a cam support shaft 63 is provided through the planting rotation shaft 34. Therefore, the planting rotation shaft 34 is configured to freely rotate around the cam support shaft 63 with the cam support shaft 63 as a reference.

  The push cam 33 is fixed to one end of the cam support shaft 63 by a key stopper 64. A shaft support plate 61 is fixed to the other end of the cam support shaft 63. Accordingly, the push cam 33 and the shaft support plate 61 rotate integrally with the cam support shaft 63.

  A plate receiving groove 62 is formed on the inner surface of the rotary case 31 on the planting transmission case 200 side. A concave portion is formed at the center of the plate receiving groove 62, and the other end of the cam support shaft 63 is fitted into the concave portion, and the cam support shaft 63 rotates around the concave portion. Further, the cam support shaft 63 rotates in a state where the shaft support plate 61 fixed to the cam support shaft 63 enters the inside of the plate receiving groove 62.

  As shown in FIGS. 9 (c) and 9 (d), the shape of the plate receiving groove 62 into which the shaft support plate 61 is inserted is a wing shape of an electric fan, and the shaft support plate 61 is inside the wing shape. It is configured to be movable. That is, since the shaft support plate 61 can move only at the wing-shaped inner portion of the plate receiving groove 62, the rotation range of the cam support shaft 63 is restricted. For example, in the shape of the plate receiving groove 62 shown in FIGS. 9C and 9D, the rotation range of the cam support shaft 63 can be restricted within 90 °. Therefore, the push cam 33 fixed to the cam support shaft 63 can also be rotated only within the range of 90 °.

  When the extruding cam 33 is fixed as in the prior art, if the planting rotation shaft 34 rotates in the reverse direction, the extruding cam 33 may be locked and the parts of the seedling planting tool 27 may be damaged. 9 (a) to 9 (d), even when the planting rotation shaft 34 rotates in the reverse direction, the push cam 33 fixed to the cam support shaft 63 is shown in FIG. Since it idles in the direction of the arrow shown in c), breakage of each part of the seedling planting tool 27 can be prevented without locking.

  When the planting rotation shaft 34 rotates in the forward rotation direction, the cam support shaft 63 is regulated with the shaft support plate 61 in contact with the edge portion of the plate receiving groove 62 opposite to the arrow shown in FIG. Works while being. When the planting rotation shaft 34 rotates in the opposite direction, the shaft support plate 61 rotates 90 ° in the direction of the arrow in the plate receiving groove 62 and contacts the edge portion of the plate receiving groove 62 in the arrow direction. The rotation of the planting rotation shaft 34 in the reverse direction is restricted at that position.

  Even when the planting rotation shaft 34 rotates in the reverse rotation direction, the push cam 33 rotates slightly in the reverse rotation direction and stops, so that the push cam 33 can be prevented from being damaged.

  It is preferable to provide a torque spring that returns the push-out cam 33 to a normal position when the rotation of the planting rotation shaft 34 returns to the normal direction.

  By providing a torque spring that returns the pushing cam 33 to the normal position, when the planting rotation shaft 34 returns to the normal rotation, the pushing cam 33 can be immediately returned to the normal position. The seedling can be normally planted without shifting the position of pushing the seedling by the pushing claw 37.

  The riding type rice transplanter of the present embodiment includes a turning interlocking mechanism that raises and lowers the seedling placing table 22 in conjunction with the turning operation of the traveling vehicle body 10 and turns on and off the driving of the seedling planting device 23.

  Moreover, the riding type rice transplanter of the present embodiment is provided with a potentiometer (angle sensor) that detects the stop angle of the rotary case 31 when the seedling planting device 23 is stopped, and the turning interlocking mechanism adjusts the detection angle of the potentiometer. Correspondingly, the planting start timing after turning is controlled.

  FIGS. 10A and 10B show the positions of the two seedling planting tools 27 attached to the rotary case 31 when the seedling planting device 23 is stopped when the traveling vehicle body 10 turns. ing. FIGS. 10A and 10B are schematic diagrams, and the seedling planting tool 27 is schematically represented by a triangle as in FIG. 15E.

  As shown in FIGS. 10A and 10B, the rotation of the rotary case 31 stops at various positions of the two seedling planting tools 27 at the timing when the seedling planting device 23 stops.

  In addition, the triangle shown with the broken line in Fig.10 (a) and FIG.10 (b) has shown the position of the seedling planting tool 27 at the time of seedling planting.

  By detecting the stop angle of the rotary case 31 when it is stopped with the potentiometer, the position of the planting rotation shaft 34 to which the seedling planting tool 27 is fixed is obtained from that angle, and the planting cycle An angle θ formed by the radial direction of the rotary case 31 at the position of the moving shaft 34 and the radial direction of the rotary case 31 at the position of the planting rotation shaft 34 at the time of seedling planting is obtained. That is, based on the stop angle of the rotary case 31, the distance from the position of the seedling planting tool 27 at that time to the position of the seedling planting tool 27 at the time of seedling planting is obtained.

  Based on the detection angle of the potentiometer, the turning interlocking mechanism obtains a moving distance from the stopped seedling planting tool 27 to the position for planting the seedling, and controls the planting start timing after the turning based on the distance. .

  Specifically, when it is determined that the movement distance of the seedling planting tool 27 to the position for planting the seedling is not more than a predetermined distance, planting of the seedling is started at a normal timing, and the movement distance is larger than the predetermined distance. When it is determined, the control is performed so that seedling planting is started at a timing earlier than usual. For example, when it is determined that the moving distance of the seedling planting tool 27 to the planting position is larger than a predetermined distance, the rotation speed of the rear wheel rotation sensor is set lower than the normal operation rotation speed, and planting is performed. Make the start timing earlier. When the rotation speed of the rear wheel rotation sensor is set lower than normal, this setting is returned to the normal setting before the next turn.

  Further, as a reference for determining the movement distance of the seedling planting tool 27 to the position for planting the seedling, for example, when the rotary case 31 is substantially horizontal (for example, the straight line connecting the two planting rotation shafts 34 is based on the horizontal). When it is detected that the movement distance is less than ± 15 °), it is judged that the moving distance is larger than the predetermined distance and planting of the seedling is started at an earlier timing than usual, and at other times, planting of the seedling is performed at the normal timing. Control to start.

  In this way, by controlling the seedling planting start timing corresponding to the stop position of the seedling planting tool 27 of the seedling planting device 23 that is stopped at the time of turning, it is possible to reliably prevent the deviation of the planting start timing. This improves seedling planting accuracy.

  The riding-type rice transplanter of this embodiment is equipped with a hydrostatic continuously variable transmission (HST) as a mechanism for transmitting the power of the engine 11.

  FIG. 11A shows a side sectional view of the HST of the present embodiment, and FIG. 11B shows a plan sectional view.

  FIG. 12A shows an enlarged cross-sectional view of the cylinder block portion of the HST of the present embodiment. FIG. 12B shows a cross-sectional view of the cylinder block of the HST according to the present embodiment, and FIG. 12C shows a cross-sectional view of the cylinder block of the conventional HST.

  The power of the engine 11 is input to the HST by the input shaft 50, and the power for driving the front wheels 12 and the rear wheels 13 is output from the output shaft 51.

  In the HST of the present embodiment, an oil passage 53 for hydraulic oil lubrication is provided inside a cylinder block 52 that rotates integrally with the input shaft 50.

  As shown in FIGS. 11A, 11B, and 12A, the oil passage 53 is provided in a configuration that radially extends from the center lower portion of the cylinder block 52 toward the upper portion of the cylinder block 52.

  By providing the oil passage 53 with this configuration, the hydraulic oil flows outward in the oil passage 53 by centrifugal force, so that the heat dissipation of the entire cylinder block 52 is improved and the durability of the cylinder block 52 is improved. Can be improved.

  In the conventional HST, as shown in FIG. 12C, a missing tooth portion 54 lacking two teeth of the spline portion is provided to lubricate the hydraulic oil. However, in the conventional configuration, the centrifugal force does not work and the lubricating force is weak. In the conventional configuration, the oil passage cannot be increased any more from the viewpoint of the strength of the teeth. If the hydraulic oil is not sufficiently lubricated, the temperature of the needle bearing 55 increases, leading to braking wear and damage to the bearing and shaft.

  In the HST of the present embodiment provided with the oil passage 53, such a conventional problem can be suppressed.

  The planting device and the seedling transplanter according to the present invention can stabilize the timing of seedling planting and prevent the planting tool from being damaged. Therefore, the seedling transplanter and the seedling transplanter such as a riding rice transplanter equipped with a seedling planting device. Industrial applicability, such as planting equipment installed in the machine, is high.

DESCRIPTION OF SYMBOLS 10 Traveling vehicle body 11 Engine 12 Front wheel 13 Rear wheel 14 Elevating link device 15 Seedling planting part 16 Driver's seat 17 Steering handle 18 Preliminary seedling stand 19 Seedling tool tip locus 20 Seedling receiving frame 21 Planting transmission case 22 Seedling stand DESCRIPTION OF SYMBOLS 23 Seedling planting device 24 Center float 25 Seedling outlet 26 Side float 27 Seedling planting tool 29 Extrusion rod 30 Arm shaft 31 Rotary case 32 Extrusion arm 33 Extrusion cam 34 Planting rotation shaft 35 Planting tool case 36 Seedling removal claw 37 Extruding Claw 38 Seedling Claw Connecting Member 39 Seedling Arm 40 Seedling Cam 41 Pushing Spring 42 Seedling Spring 43 Pushing Rod Connecting Member 44 Seedling Cam with Concave 45 Concave 46 Seedling Tool Second Tip Trajectory 47 Rotating Shaft Revolution Trajectory 48 Seedling plant tip movement trajectory 49 Seedling planting tool second tip motion trajectory 50 Input shaft Reference Signs List 51 Output shaft 52 Cylinder block 53 Oil passage 54 Notch portion 55 Needle bearing 61 Shaft support plate 62 Plate receiving groove 63 Cam support shaft 64 Keying 200 Planting transmission case 201 Planting drive shaft 202 Rotary case 203 Seedling planting tool 204 Planting tool trajectory 205 Eccentric sun gear 206 Eccentric counter gear 207 Eccentric planetary gear 208 Planting tool rotation shaft 209 Counter gear shaft 210 Planting tool case 211 Seedling claw 212 Extrusion claw 213 Seedling receiving frame 214 Rotating shaft trajectory 215 Seedling 216 Soil

Claims (7)

A planting device (23) for taking a seedling placed on a seedling stand (22) mounted so as to be movable up and down behind the traveling vehicle body (10) and planting it in a farm field,
A rotary case (31) rotatably attached to the planting transmission frame (21);
A plurality of planted bodies (27) rotatably attached to the rotary case (31);
The planted body (27)
Planting case (35),
A seedling removing claw (36) attached to the planted case (35) and taking the seedling from the seedling mount (22);
Extrudates (29, 37) that are attached to the planted body case (35) and push the seedlings held by the seedling picking claws (36) to the field,
An extrudate moving mechanism (32, 33, 41) for moving the extrudate (29, 37) along the seedling claw;
A planting apparatus, comprising: a seedling removing claw moving mechanism (39, 40, 42) for retreating the seedling removing claw (36) along the extruded body (29, 37). A rotary shaft (34) is rotatably attached to the rotary case (31),
The planted case (35) is fixed to the rotating shaft (34),
The extrudates (29, 37) are held movably along the seedling claw (36) in the planted case (35),
The extrudate moving mechanism (32, 33, 41)
One end is connected to the extruded body (29), and the extruded arm (32) is rotatably attached to the planted body case (35).
An extrusion cam (33) in contact with the other end of the extrusion arm (32) and fixed to the rotary case (31);
An extrusion body biasing spring (41) for biasing the extrusion arm (32) in a direction in which the extrusion body (29, 37) moves forward;
The push arm (32) moves the push body (29, 37) backward against the push body biasing spring (41) by contact with the push cam (33).
The seedling claw (36) is held by the planted body case (35) so as to be movable along the extruded body (29, 37).
The seedling claw moving mechanism (39, 40, 42)
One end is connected to the seedling picking claw (36), and a seedling picking arm (39) rotatably attached to the planting case (35),
A seedling cam (40) that contacts the other end of the seedling arm (39) and is fixed to the rotary case (31);
A seedling catching claw biasing spring (42) that biases the seedling catching arm (39) in a direction in which the seedling catching claw (36) moves backward,
The seedling picking arm (39) advances the seedling picking claw (36) against a seedling picking claw biasing spring (42) by contact with the seedling picking cam (40). Item 10. The planting device according to Item 1. The extrudate moving mechanism (32, 33, 41) and the seedling removing claw moving mechanism (39, 40, 42) are arranged in the planted body case (35),
The seedling removal cam (40) is disposed closer to the rotary case (31) than the extrusion cam (33),
The seedling arm (39) is disposed closer to the rotary case (31) than the push arm (32),
The planting device according to claim 2, characterized in that the seedling claw urging spring (42) is arranged between the seedling claw (36) and the extruded body (29). The seedling claw moving mechanism (39, 40, 42)
After the planted body (27) has planted the seedling taken by the seedling picking nail (36) to the field, the seedling picking nail is taken until the next seedling is taken from the seedling placing stand (22). (36) is shaped so that the seedling-taking cam (40) is not in contact with the seedling-taking arm (39) so as to move backward.
The said seedling picking nail | claw (36) is moved ahead, when the said planting body (27) comes to the position which takes the next seedling from the said seedling stand (22), It is characterized by the above-mentioned. Planting equipment.   The seedling removing claw moving mechanism (39, 40, 42) is arranged at a timing before the extrudate moving mechanism (32, 33, 41) moves the extrudate (29, 37) backward. The planting device according to any one of claims 1 to 4, characterized in that the claw (36) is moved rearward.   The seedling-claw moving mechanism (39, 40, 44) is configured to plant the seedling held by the seedling-claw claw (36) until the tip of the seedling-claw claw (36) comes out of the field. The planting device according to any one of claims 1 to 5, characterized in that the seedling picking claws (36) are temporarily moved in the middle. A seedling stand (22) mounted behind the traveling vehicle body (10);
A seedling stand having a rotary case (31) rotatably attached to the planting transmission part frame (21) and a planting body (27) rotatably attached to the rotary case (31); A planting device (23) for taking the seedlings placed in (22) and planting them in a field;
In conjunction with the turning operation of the traveling vehicle body (10), the raising and lowering the seedling platform (22), and turning on and off the driving of the planting device (23),
A potentiometer for detecting the angle of the rotary case (31),
Based on the angle detected by the potentiometer, the turning interlocking mechanism is such that the position of the planted body (27) when the planting device (23) is stopped is the planted body (27) at the time of seedling planting. If it is determined that the distance from the position is more than a predetermined distance, the planting device (27) is more than the case where the distance from the position of the planted body (27) at the time of planting the seedling is less than the predetermined distance. 23) A seedling transplanting machine, wherein the planting start timing according to 23) is controlled to be advanced.

Images